> "Even when summing up emissions from tires, brakes, and road wear, BEVs produce 38% less particulate pollution than gas-powered cars before even considering their lack of tailpipe emissions."
https://www.cars.com/articles/do-evs-wear-through-tires-more...
I leave it in eco mode, so acceleration is nerfed, too.
We’ll see how long the new set of Michelin Defenders last.
Performance oriented EVs, just like performance oriented ICE cars, are going to have softer, stickier tires that wear faster.
brtkwr has a Kia Niro, not a Taycan. It's not a performance vehicle.
That said, I agree he's likely got tires with shit longevity.
The other thing is poor alignment (especially toe settings) which cause the tyres to fight each other constantly. It can be a very small difference, almost imperceptible but still accelerate the wear.
10k miles is very short for a tyre.
Often you can tell a lot from the tyre temperature after a drive: if they're getting very warm, it can indicate problems, e.g. if one axle has much warmer tyres than the other (hard to give an objective standard on that, though, so many factors)
A friend got hit by this as well and since readjusting his driving style (read: not flying through corners for the fun of it) he gets more (but still not equal) miles on his EV's tires before he needs new ones.
I assure you. If your EV tires are only lasting 10K miles you have one of the following cases:
- You are driving VERY aggressively
- Your car has an alignment issue or some sort of torque vectoring problem
- Your tires are absolute shit
Cheap tyres are often a bad investment, but I drive country lanes with a higher risk of punctures and I was burning through brand name tyres, a full set is worth more than my car!
Alignment is fine, had it checked when I had a new set of continentals fitted.
My problem is purely that I drive like an asshole, on very windy, empty roads. Every day is track day.
Decent tyres, too, continentals - soft compound, hard roads. Means it corners like a dream right up until the tyres are bald.
If driving Tesla, you can reduce the regenerative breaking from Maximum setting to Medium.
this will reduce regeneration and will increase the "breaking distance" when you just let go of accelerator pedal.
but it will increase your tire life significantly.
also make sure to buy the "commuter tire" models - tires with high mileage warranty (50k miles+) and harder compound. Even if it wears out faster, tire manufacturer's warranty will make up for it by giving you discount for the replacement tire purchase
by reducing regeneration, you will increase tire life by virtue of modifying your acceleration behavior. Its hard for me to explain, but I just suggest trying the medium regenerative setting and you will see it yourself.
You will feel it, because the most of the tire wear happens when car decelerates. On less regeneration your car will decelerate less and will wear out tires slower
I could come up with a list of plausible sounding reasons why regenerative braking leads to less tire wear. Unless you have some actual measurements, I wouldn't trust either one.
I'll also throw another anecdote in for this thread, 500hp EV, 50k miles on the tyres.
Is this generally true? I imagine it depends on the car/driver to a certain extent, but still I'd be curious what numbers are out there.
Up to 60% goes back to battery, part goes to air resistance and rolling tire resistance (can be ignored for our case as its the same regardless of regen setting), the rest goes to friction of tire/road due to slowing down tire speed
The two claims you've made are that deceleration results in more tire wear than acceleration, and that regenerative deceleration results in more tire wear than non-regenerative deceleration. These are what people are questioning you about.
what is relevant to prolong the tire lifetime is reducing the unnecessary tire friction against the road.
There is constant component that depends on the weight * velocity * mileage - you gonna encounter it in all scenarios
There is also a variable component that is driven by 1st derivative of speed (rate of acceleration/deceleration).
The high regeneration allows you faster acceleration/deceleration, but medium/lower will (1) change your driving behavior so that you accelerate more smoothly, and (2) change your deceleration so that you coast more and decelerate less
remember, car's kinetic energy is not a perfect energy storage, so that you could freely move energy from battery into car speed, and regenerate it back into battery.
apart from air resistance, there is 60% loss on the way back + tire wear penalty depending on accel/decel curve (1st speed derivative)
No, it doesn’t. The tires don’t care if it’s the car’s motor slowing things down, or some friction material grabbing a disc.
But my inlaw has a neo from new and hasn't replaced the tyres yet, and hes an auto obsessive. He lives in the midlands and drives 18k a year.
I'm likely to end up replacing mine based on age-related degradation rather than wear.
I've got a Model 3 Performance which came with the Michelin Pilot Sport 4 tires which are only warrantied for 30,000 miles. I had them for 5 years and 35,000 miles and they STILL had plenty of tread left. I had to replace them anyways because I hit a nasty pothole that caused the tread to separate.
Lower profile rims also beat up tires way harder if you drive hard because the lack of sidewall flex lets you put more force to the ground which has to go through the tread of the tire to get there.
Modern tires for modern cars also bias toward soft and high wearing because there's pretty much no other way to keep higher end vehicles stuck to the ground with the power to weight they're making these days.
There’s no good reason why you should be changing your tires at 10k miles.
Next time get tires with a 50k mile warranty, like Pirelli Scorpions.
Accelerating and decelerating, in regards to the tire, don't care what is causing the force.
The Model X's curb weight ranges from 5,148 lbs to 5,531 lbs, while the Telluride's curb weight falls between 4,112 lbs and 4,482 lbs.
The tires are doing the stopping. As you said the engine is the part that doesn't matter. But if it increases the stopping power, it's doing that by increasing the load on the tires.
I know I know, people aren't supposed to be taking off from every light at full chat, but, given the capability some people can't help themselves.
What this means is that you can push tires to the absolute limit and not chirp them (which, is best for traction anyways) which absolutely roasts them. Most people associate chirp = too fast, but with EVs you can never hear a chirp even when you stomp on the accelerator so they might think everything is ok.
Nobody should be shredding a set of tires in 10k miles in any EV unless they’re super low tread wear (poor tire choice, hard to do that bad), there’s an issue with the car suspension, or they’re just being idiots.
Though it might fall under the "being idiot" category.
If you're track racing, it should be obvious you'll blow through a set of tires much faster than the treadwear ratings would suggest.
Although I may drive a bit more sensibly for now as €4K a year on tyres wasn’t in my budget.
Of course the tyre companies love that little trick as they can pretend they are being green while selling more tyres.
Always check how much tyre you’re buying
- evs have a reputation for fast acceleration, and many drivers use it. More wear.
- evs are heavy due to large batteries trying to match ICE range. More wear.
- evs often come with low friction tires to improve range, they wear faster
The second two issues should gradually go away as battery (and charging) tech improves.
They're not low friction tires, they're low rolling resistance tires.
Friction relates to the grip, rolling resistance relates to the heat generated by the deformation of the tire. A less compliant, often narrower tire may wear faster than a more compliant wider one.
It depends.
"Tyres account for about a fifth of the energy required to power a car. They provide friction, so that the vehicle can grip the road, but some of the power supplied to the tyres is then lost as heat. Indeed, Michelin, a French tyremaker, estimates that this “rolling resistance” accounts for 4% of the world's carbon-dioxide emissions. Tyre designers have therefore sought to improve fuel economy by reducing rolling resistance. However, this not only reduces a tyre's ability to grip, making drivers take corners sideways, it also wears out the tyres more rapidly."
from: https://www.economist.com/technology-quarterly/2009/12/02/ro...
without login: https://archive.is/TiIUk
Those two attributes are pretty decently tied together, can't get one attribute maxed out without a solid showing of the other.
Some of the lowest rolling resistance tires also last 80k+ miles. It's not a tradeoff in the way you're claiming.
I know road damage is far higher (fourth power of weight) so maybe wear on tires is also worse than linear?
heavier vehicles are also worse in many other ways (e.g. less safe for pedestrians, require more space for parking,...) and we really should be encouraging smaller vehicles.
And tires of course aren't created equally. There are many different types of tires and they are optimized for different circumstances. If you mismatch your tires to e.g. weather conditions, you are going to have issues. Not just with EVs, but with any car.
I can vouch for the very low brake pad usage as well.
How could you possibly measure that just from your personal experience?
Sounds more like a wild guess that is in contradiction with actual studies.
Simple napkin math by comparing longevity of parts with volume of parts consumed.
FWIW I think the qualitative difference between tire and brake dust is going to mean a lot more than individual variance.
1) Aggressive driving which is easier to do in a number of EVs due to instant torque. 2) tire compound, a lot of oem tires are soft 3) something wrong with the cars drivetrain or suspension.
10k is comically low, my model y oem tires lasted to 30k before tread depth passed the safety threshold. I also keep it in chill mode.
Zero tailpipe emissions, drastically removed brake dust, slightly higher tire wear (due to weight), but much better overall than ICE.
Over say 50km part of highway, maybe 2000 cars need to overtake such almost stationary object (to regular traffic which generally moves exactly at the speed limit). Fine if you have 3+ lanes, but most highways in Europe have 2 only. Then you have all the trucks, buses and rest of traffic trying to overtake via that 1 free lane, which in heavier (but still cca smooth) traffic will create a massive moving traffic jam immediately.
If I didn't see this every other day (and for some reasons its 90% tesla drivers where I live and rest is caravans) I wouldn't believe it to be so common, but it is. Summer now makes it even worse with all holiday drivers.
Was very concerned until I realized you were talking about kilometers and not miles.
Otherwise, I'd hope the average driver would firce themselves to drive slower than 120mph out of some sense of fear, or at least a sense of self-preservation.
80km/h is the usual maximum allowed speed for trucks, at least in Germany, so no idea how a car driving 90km/h is such a big problem. That's not a "stationary object" at all, far from it. You are even allowed to drive vehicles with a minimum speed of 60km/h on the Autobahn.
If a car driving 90km/h is the cause for a traffic jam there are definitely other factors at play. Not just in zones with a limit of 120km/h but everywhere even without limits.
so just like any truck.
if you think it's a problem, you're the problem. sorry.
But yes, they can be turned off.
With Tesla it's all-or-nothing, and when it inevitably drives poorly, I can only turn it off. It physically resists me turning the steering wheel while it's driving, and overcoming the resistance results in an unpleasant and potentially dangerous jerk.
OTOH in IONIQ I can control lane assist and adaptive cruise control separately. The lane assist is additive to normal steering. It doesn't take over, only makes the car seem to naturally roll along the road.
It will be very interesting to see the data for the same car that has many powertrain versions for example the Lexus UX with the UX 200 (ICE), UX 300h (hybrid) and UX 300e (EV) to test which one the best and the worst in term of brake dust residue.
My hypotheses is that for brake dust residue the best is hybrid, 2nd will be ICE and the 3rd will be EV. This is due to the fact that the EV version has at least several hundreds kg extra weight (about 400 kg extra), that makes the brake dust residue comparable to ICE if not worst based on the approximately 30% extra vehicle weight for the battery. The hybrid however only has approximately 5% more weight or extra 80 kg different compared to the ICE version.
EV versus hybrid I couldn't say, it comes down to exactly how strong the hybrid regen is and how aggressively the owner brakes in comparison.
Why is your hypothesis so different from mine? How much use do you expect the EV brakes to get?
You could achieve the same with engine braking with ICE but most don’t bother.
It will regeneratively brake all the way to a stop.
The brake disks are there for emergencies and spirited driving.
Did you miss pretty much all data on EV brakes, notably that they get used so little they’ll rust to slick and manufacturers have to implement de-rusting cycles to ensure they can actually do something? Your hypothesis is nonsensical on its face. Calling it a hypothesis is insulting. Even to flat earthers.
Extracting rare metals from Africa, sending to China for transformation into batteries and back to US/EU for putting into an EV (that we cannot properly recycle yet) just cannot be cleaner than melting an ICE with processes that are 100+ years old and that can be done locally without the use of ships to make 3 roundabouts on earth.
Yeah established on a truncated view of reality !
Saying it must be inefficient because it includes ship transit instead of trucking "locally" is innumerate.
> In countries that get most of their energy from burning dirty coal, the emissions numbers for EVs don’t look nearly as good—but they’re still on par with or better than burning gasoline.
Trump's own EPA calls your argument the #1 myth about EVs. https://www.epa.gov/greenvehicles/electric-vehicle-myths
Same goes for myth#1 IMO numbers are Trump related propaganda and have nothing to do with reality. Furthermore on myth #1 they talk about efficiency of EV vs ICE but totally forget to mention the efficiency of generating that said energy : 33% efficiency for coal based electricity generation VS 90% for petroleum refinement .... In the end when you sum up overall efficiencies are identical so I call bullshit and propaganda ...
I also trust MIT more than Trump (I'll trust a poodle over him), especially on EVs. The point is even Trump's loony EPA clearly states they're better for the environment, inclusive of coal power. (Which MIT agrees with; I quoted your source!)
Ships are indeed more efficient if you look at it on per mile comparison but distances are much bigger. Shipping things from one side of the planet to the other is not something too efficient imo. It's just makes sense if you look at economics and differences in price of labor, regulations and so on but these do have externalities that eventually cancel out the benefits.
> just cannot be cleaner...
Someone doesn't!
Quote : This intensive battery manufacturing means that building a new EV can produce around 80% more emissions than building a comparable gas-powered car
Show me anything else if you have ; just don't troll dude...
It seems you agree with the poster upthread, who stated "much better overall than ICE".
Also this article does not take into account recycling of batteries which is way dirty that recycling ICEs.
And my initial remark was show me data, show me interesting stuff and you just dumbly troll (quoting truncated stuff) on what I have shown you. Nice man, u smart !!!
It changes nothing. People buy cars to drive them.
> Also this article does not take into account recycling of batteries which is way dirty that recycling ICEs.
I'm sorry you can't be bothered to read your own link. This is in the footnotes as a source for it:
Erik Emilsson and Lisbeth Dahllöf. "Lithium-ion vehicle battery production: Status 2019 on energy use, CO2 emissions, use of metals, products environmental footprint, and recycling." IVL Swedish Environmental Research Institute, in cooperation with the Swedish Energy Agency, Report C444, November 2019.
'I'm sorry you can't be bothered to read your own link. This is in the footnotes as a source for it:' just click on the damn link, use google trad, find the paper and READ (not just troll as if I didn't) the recycling chapter by yourself ! It does not include real-world data, it's theoretical/research data IF batteries were recycled in EU/US with up to date processes. As of today 2025 all batteries are 'recycled' (joke..) in China/India by underqualified people with a CO2 cost WAY higher and this is NOT taken into account in the study. So yeah I'll say again : real recycling, the one we do right now IS NOT ACCOUNTED FOR !
Useless discussion anyway, you don't add any argument or source, just trolling on my words, nice !
Again, I reference your source:
"Yet when the MIT study calculated a comparison in which EVs lasted only 90,000 miles on the road rather than 180,000 miles, they remained 15 percent better than a hybrid and far better than a gas car."
Both of my cars have 100k+ miles on them, with plenty of life left. Modern vehicles seem to do 200-300k miles regularly.
I am not an outlier: https://www.reuters.com/business/autos-transportation/americ...
"The average age of U.S. cars and light trucks this year rose to a record 12.6 years, according to the report by S&P Global Mobility on Wednesday, up by two months from 2023."
The average American drives 12k miles a year.
I'm not sure why you zeroed in on a source that openly debunks all of your arguments, but I do appreciate the assist.
And thus higher tire particle pollution. And it's not slightly, EVs are on average 10-15% heavier than similar ICE vehicles. We've now found that a lot of the various small particle pollution (e.g. in bodies of water) come from tires.
So, while still drastically better than ICEs, they still have externalities (pollution, time wasted in traffic, vehicle accidents) and there should still be efforts to try to reduce the number of cars on the roads instead of just replacing them 1:1 and calling it a day.
That this is considered a valid response to someone suggesting we need more mass transit is a sign that our discourse has fallen off a cliff. You can and should do better.
EVs are better than ICE cars, but shared-use buses/trains/etc. are often even better. We can do more than one thing.
Nobody is trying to take your car away, you scared person who cannot fathom not being attached to a car.
I'm merely saying there must be alternatives to driving. I don't care what they are, they will be location dependent. If you want to drive, as long as you pay your externalities, nobody cares. But it's fundamentally wrong to gatekeep all of society behind a fundamentally inefficient manner of transport (individual cars). It's wrong socially (no social mobility), it's wrong ecologically (cars are still the most polluting way of transportation, even EVs), it's wrong economically (very inefficient), it's wrong from the amount of people dying from cars, it's wrong on every possible measurable metric.
So, alternatives should be present, so that those that wish to do so, or for whom it's better/faster/more efficient/can't use anything else because of mobility issues/can't afford anything else, they can take them. Bike lanes, trains, buses, whatever, doesn't matter.
How many people die in cell phone accidents yearly where you live? How many have reduced lifespans due to the pollution of cell phones? And how many hours can be saved per year per human with good cell phone sharing? I would guess the number is 0 for all of those, but quite a bit higher for cars alternative transportation options.
If you feel personally offended by the mere idea that there might be alternatives to cars, and that at the scale of a human settlement, they're often better, you need to take a step back and consider why you identify yourself with cars so much. And if that doesn't help, consider that more people having alternatives means less cars on the roads, so more space for you to vroom vroom around and less people bothering you on the road!
Irrelevant on the topic of there being more efficient modes of transportation of humans in dense environments.
> There is no other object that has been a greater detriment to mental and physical health in human history
While potentially true, that's entirely ignoring all the extremely useful things people do with their phones.
> only using public transport
The fact that you take a mention of providing alternatives to cars as a stance on "only using public transport" indicates to me that you're not interested in having an actual discussion, and your car is part of your core identity. None of that is healthy, so again, step back and consider the benefits. Even purely selfishly, more people out of cars because they can bike or take the train is better for you because there will be less traffic for you.
To be fair: thousands. https://www.ncsl.org/transportation/distracted-driving-cellp...
They can't make it into their garages on the narrow road, and there are no curb side plugs in the front (NEC safety rules.) Funny until the Garbage truck rage mashes the horn at 6am... lol =3
Plus, most people can charge at home with an extension cord. It's not particularly fast, but you should be able to get 4-5 miles an hour. In the worst case scenario where you can only charge at home and can only charge for 10 hours overnight, that's still 40 miles of driving which is enough for a lot of commuters. Even if it falls short—again—you can use public chargers.
Lastly, eliminating the sale of ICE cars will be a pretty rapid forcing function on the deployment of EV chargers. Still, I'd be all for locations that ban combustion engines mandating that landlords provide EV charging facilities.
EV is not for everyone, but those Rivian are nice though. =3
EV are meant for people that live in 4'C to 42'C weather, and have excess capacity on their solar installations. Everyone else is getting subsidized by their neighbors paying for excess electrical capacity. =3
In the UK at least, there are more EV chargers than gas/petrol stations: https://www.vertumotors.com/news/there-are-more-charging-poi...
In case it sounds like I'm gas station lobby: I'm not against EVs at all and don't own a car, I'm just wondering if this is a fair comparison
FWIW a fast charge is like 10-15 mins usually while you grab a coffee or something - in modern EV cars you have 100-200kw (or more!) charging where you can get like 400 or 500 miles in an hour, so 15mins gives you 100-125 miles extra range etc. If you time it, filling up a gas tank and going in to pay and all that is not like 40 seconds but more in the 5-10 mins mark, so 15 mins top up on a longer journey is not that much longer than filling up.
It's a bit of a different mentality really - with petrol/gas I'd fill up to the brim then drive until I was almost empty, but with an EV I wake up with a full tank and just do a quick top off here and there during the day (assuming I ever need it which 99% of the time I don't) until I can get home and charge overnight where is way way cheaper.
With petrol I'd never stop to just put in a few litres at a time, but doing it with an EV is so simple and easy, and you can go do something else while it's happening. Picking up some groceries, getting a coffee, bio break etc - perfect time for a top up
The tracking, the module security lockdown, and that in a couple years particulate filter systems like DEF for diesel that everyone just loves… is coming to petrol by regulation.
Now quadruple this.
"super extra 1gigawatt charging" isn't coming to my area, potentially ever. Afaik there's two "super chargers" in my metro area, both at dealerships. i've actually never seen a Tesla charger in person.
But you have to do that probably weekly. And then also spend a lot of money while doing it. It seems you believe those driving EVs are "suckers", but do you realize you probably spend hours and hours more in a year going to the station and pump compared to most EV owners never having to do that in their daily life?
for instance, my nearest gas station is 2 miles away. The nearest place to actually buy fresh food is a 36 mile round trip.
furthermore calling the gigawatt charging stations "electric plugs" is real disingenuous.
Zero to a hundred, you know that isn’t even remotely true.
Your display says that. And your display is bullshit.
I work with the people that make the displays man. There are entire groups dedicated to deciding what is indefensible lies, and what “could be true under the right circumstances so we’re allowed to say/show that”
> Why are you talking about charging from 0 to 100 % when that's NOT how you charge an EV,
lol, go to a charging station sometime and see the people sleeping or watching tv. If it’s your primary vehicle and you want to go somewhere, you are going from 0 to 100.
Only laws (accommodate EVs and/or WFH) or spending time sitting at a gas station will help me here. No landlord is interested in accommodating an EV unless it's a net benefit to them (and thus a net negative to me, who already spends 40% income just to have a place to work.)
Having a car right out one's door is a real luxury though, no more than two steps through any weather. I can see the appeal, just not sure if the collective downsides are worth it compared to arranging good transport inside of, and between, cities. Outside of populated areas, yeah, whatcha gonna do, but at least inside of major settlements we ought to be able to get this done (in many cities it's already okay to not have a car, but imo the facilities to get to the countryside are relatively annoying and needlessly expensive)
I'm sure there are some homeowners who can't - maybe listed buildings, or these weird HOA rules I hear about from Americans.
Make EVs chargeable for those who choose to live in the urban jungle and then talk about their merits.
So far its like 1 or 2 a street (and not all streets either), but hopefully one day it will basically be all of them in every street so you don't need to worry.
So if you need to park overnight on the street anyway, park next to a lamp post that has the socket. Its "slow" charging at 4 to 5 KW, but if you're parked for 8-12 hours (while you are asleep), that is quite a considerable top-up in the 40-50KWh range.
Either of those two common types of companies you can possibly "win" an easy way to charge your daily commute.
By solving the renters-think-they-need-to-own-a-car problem.
It’s still been a problem in several places though, because it forced poor people with old cars to either upgrade or stop driving. An equitable alternative would have included a way to get a new car free or at least cheap.
B100 is almost carbon neutral, and has the energy density necessary for commercial logistics. Finding responsible manufacturing methods is far more feasible.
EV only make sense with distributed generation like home solar. =3
It is cleaner from a sulfur content and long-term carbon cycle perspective, but is very similar to regular fuels.
The dilemma is whether B100 it more difficult to scale than trying to retool our entire global energy infrastructure with finite rare earth metals. =3
I would love to switch to electric but at current charging times and absolutely horrendously incompetent grid deployments, there’s no way all of the thousand people in my building could, much less the million other renters in the city. (And certainly transit can’t cope with us either, given the continued homeowner hostility to paying taxes for such things.)
What city has charging available for an average of greater than one spot per five hundred multifamily-housing residents? What parking garages anywhere in the U.S. have 25 or more electric vehicle chargers per 100 daytime and/or overnight and/or reserved parking spots, in order to diffuse the grid cost through trickle charging? What funding model is proposed to ensure that’s built whether corporate garage owners like it or not? How will states who depend on fuel tax to keep roads in repair avoid cutting off city services to suburban outregions when their asphalt budgets crater?
Technology has downstream effects, and it’s not as simple as “buy a Prius” when you consider U.S. non-homeowners. (I assume the prospect for India electric conversions would be much worse, too.) “Ban combustion vehicles” is a lofty goal, but until the charging grid problem is solved, it’s an unattainable one.
Of course if you're commuting 2 hours every day, things will be different. But for us, it's been great.
We use perhaps 5% battery of our VW ID.3 on a typical day (school run, shops, visiting friends or whatever) so we just do an over-night top-up back to 80% maybe once a week when we get down to ~50%. Working surprisingly well - I am not sure I can be bothered to get the proper charger installed (which is annoying as I have already bought it and the cable for about £800 and its just sitting in my shed!)
Assuming a 120V / 20A = 2400W circuit (more or less standard in a garage):
100 parking spots = 200A / 24000W; 300 parking spots = 600A / 72000W.
So a distribution line can carry 72kW readily enough — that seems to be about where they are anyways — but if it's carrying that load, it cannot carry any other load, which means that each high-capacity parking garage will need a dedicated line from the nearest substation is.
Then, that parking garage will need to distribute that current to 300 parking spot chargers. Even at 120V/20A, that's 300 new circuit taps; 300 wires, initially. You can use three-phase to reduce that to 100 wires @ 120/20A or equivalent each, which is a lot. Or you can reduce that to 3 wires @ 120V/200A or equivalent, at which point you now have the safety considerations of an outdoor distribution wire in a small enclosed fire-prone space, and you're facing the christmas light problem of "one blown bulb" versus one third of your garage.
Then you need to confront "the chargers need to support burst-mode" so that people can push a button to get a temporary fast-charge ignoring all other concerns — but also "the chargers need to default to trickle-mode", while also considering that trickle-mode should run faster when fewer cars are plugged in (or else tenants will take offense that the chargers aren't using provisioned and available capacity), and that Time-of-Day concerns should cap trickle-mode during peak so that the grid doesn't fail. And that electric vehicles are foreseen as a component of localized grid storage, so garages might need to support backfeeding from cars.
And this all has to be coordinated across three hundred chargers and who knows how many feeder circuits, between one three-phase and three-hundred one-phase, assuming that 72kW (120V/600A) is provisioned to trickle-charge the entire garage each evening at 15A per car max (have to leave some headroom for the burst needs, for momentary overdraw before a charger fuses out a defective vehicle, etc).
This is all doable, but it is logistically expensive, and I would estimate that cost at perhaps tens of millions of dollars at that scale. Doing this for my old 12-apartment complex would merely require 2.4kW of new power delivery, taps, and distribution under the pavement (there's no room for overhead poles to be introduced), without sinking the property into the riverbed it's built on, and without breaking the local emergency services grid that it's drawing from when the creek next door floods every few years.
Retrofit costs are estimated at $5000-$15000 per single parking spot (new buildings are wired more efficiently so halve that cost for anything built since the Model S came out). California at one point was offering a 30% subsidy on retrofits; so, for my example, 300 spots * $5000-$15000 = ~2-4 million dollars (napkin rounded) for a single apartment complex. At local 1-bedroom housing prices, that's around 1000 rent-months of capital investment with no future gain — and that's the most critical part here. The complex cannot recoup that investment through maintenance and usage fees, because those will have to be paid out in actual maintenance and kilowatt-hours — and tenants, in this economy, cannot afford to subsidize the buildout cost.
So until retrofits are either state-funded or state-mandated, landlords have little to no reason to invest their money into the future of electric cars, because they'll get pennies on the dollar at best from their investment. And, given their tendency to collude via RealPage, no one will be the first to build out a 100% EV charging garage because that will not only long-term devalue their other properties without increasing the short-term value of the one improved, but also will start a race to the bottom that they are already colluding to try and prevent.
Yes, trickle-charging is electrically feasible — it's compelling the profitless capital investment that is not.
Other countries have figured this out. Norway in particular. Working transportation models exist and this country has the funds to make it happen. However because of American Exceptionalism, we have very limited options.
Yet every single morning and evening there is huge traffic jam around every city. Every single year highways are more full, more issue with parking.
If it can't be solved in such ideal country for public transport, I am not holding breath for rest of the world, and just wishing something ain't gonna make it real. There are many reasons why situation is as it is (it costs a lot, even such transport doesn't cover many people's cases well enough and nobody wants to spend 120 mins every day commuting via public transport when its say 60 with cars).
What I can imagine actually working - uber style shared robo (meaning cheap) taxis/minibuses. Big enough network that one can even switch a car in some 'taxi station' for more efficient trip that would take just marginally longer than driving oneself. This solves a lot of parking issues in cities and would reduce traffic to maybe half or a bit less.
Banning gasoline vehicles is the goal. In the U.S., all known solutions require capital investments that corporations can't extract a 'growth in profit growth over time' from, while disadvantaging the vehicle owners caste. Solve that, and you'll solve a lot more than just gasoline vehicles.
We have scaled it! We're a country of 330 million people where almost everyone drives.
> However because of American Exceptionalism, we have very limited options.
It's only "American Exceptionalism" insofar as Americans are rich compared to Europeans. Upper middle class people across Europe also live in suburbs and drive to places. American wealth/land space simply enables middle and lower middle class people to do the same thing.
said the man, 37 trillion dollars in debt. Go team!
Landlords can charge tenants over the price of electricity.
> What city has charging available for an average of greater than one spot per five hundred multifamily-housing residents?
Shanghai: https://english.shanghai.gov.cn/en-Latest-WhatsNew/20240508/...
Napkin math time. Assuming that Shanghai has ~1% of China's 420 million vehicles, given that Shanghai has ~2% of China's population (~8 million) and assuming a car ownership rate of 0.5; then Shanghai can be estimated to have 4 million vehicles, while only having 0.8 million charging locations (as the article indicates). 20% certainly does exceed 0.2%, and they're ahead of the game with ~2 charging locations per EV today — but that also means that they've only converted ~10% of Shanghai's gasoline vehicle population and are only provisioned to support 20% conversion right now.
However, I think that China has a significant advantage versus the U.S. — they are primarily selling very small vehicles for intra-city use. So, their charger capacities can be significantly lower per vehicle than in the U.S., which reduces their difficulty of electric conversations probably by a full order of magnitude from ours.
This does not match what I’ve seen in China at all. Nor does it match up with any data I’ve seen about the best selling cars in China. Do you have any data on this?
This doesn't really matter that much. The average car commute in the US is less than 40 miles per day. Even if we assume that everyone gets a fairly giant Model X, that's still around 12kWh of energy per day.
You can get that much power from a regular 120V wall plug within 8 hours.
Typical car density for my nearest three grocery stores is 25-100 vehicles fluctuating during three or four peak hours. The highest number of chargers at any of those stores is 8, followed by 2 and 0; of those, 8 have been out of service for the past 60 days because someone is playing negotiation hardball with the charging services provider.
When the chargers were working, they were nearly at capacity for the entire day, at current (low) levels of electric car fraction of the population; there's no way they're prepared to cope with a full conversion, at which point the same power density and distribution problem that impacts multifamily parking garages instead (or as well!) affects grocery stores.
There are smaller and more practical changes that would have huge benefits. More public transport, pedestrianised areas, encouraging people to drive smaller cars (lots of ways to do that - e.g. reserve some parking for small cars, tax vehicles on weight) would all have huge benefits.
Annoyingly, I've already invested in a 11kW charger (with 22kW infrastructure) which I've never used!
You don't need "magical DC-charging" to go EV.
[1] My wife, being from the west coast, used to walk around NYC in flip flops, and would come home with her feet black from brake dust and soot and god knows what else.
You know how Tesla makes a fuckton of money? Selling their carbon credits to industry so they can pollute. So all the pollution reduction caused by people driving Teslas enables industry to pollute instead of controlling their emissions, reducing energy waste, decarbonizing, etc.
Credits are indeed a scam but they are not a mandatory component of a carbon externality tax.
Well, I like that the people that think like this also probably live I places where you are actually driving a coal powered car.
Like the clowns in Hawaii that have extra subsidies for EVs… their power comes directly from burning crude oil.
I’m an automotive EE, and and the truth about EVs is in a rush to push them out the door, the media and politicians have set the tech back at least a decade by pretending it is something it’s not.
EVs for most people outside of California. Make a great town vehicle or second vehicle.
A ban on ICE… wow.
Exactly, as long as no one sees it, it isn’t happening. Same with them burning plastic and trash.
That's still an improvement for both global and local emissions.
Because of math.
A 6 kW house, to charge a 60 kW battery… so long as everyone with an electric vehicle is charging them at their house for 10 sunny hours to charge from empty, you’re right and I’m wrong.
Some people could get by, but it leaves the solar for nothing else. If you leave the house while the sun is up you better get back because you’re losing daylight!
The average is 8900 miles per year which is a little under 24 miles per day and a little under 750 miles a month.
If you can charge with solar at 6 kW on a typical EV that will give you about 20 miles per hour of charging. If you can do a little over an hour a day you will be covered.
If you find plugging in for an hour a day to much of a hassle it is under 9 hours a week or 37 hours a month.
Good to know how wrong I am on this topic. Let me guess, you own an EV? Well, that certain explains it everything.
You made some basic mistakes in your previous reply, such as confusing power (kW) and energy (kWh) and assuming that a typical driver in HI commutes something like 250mi each day. This isn't even typical for drivers on the mainland, where plenty of EV+solar owners manage to replenish most or all of their EV usage using rooftop solar generation just fine.
(If you're going to answer "well, I never said I was considering the median distance/day case - I was talking about the most extreme scenarios!" then I'd suggest at least bumping up the hypothetical solar installation to 10kW instead of going with the median.)
First, EV engines are far, far more energy efficient than ICEs. Secondly, fossil fuel power plants are far more efficient at converting fossil fuels to energy than ICEs are (since the energy efficiency of a thermal engine is proportional to its volume).
The result is that the EV car mileage you'll get by burning 1t of oil in an oil power plant is much, much higher than the mileage you'll get from that same 1t of oil in ICE cars. I'm not 100% sure if this holds true for coal based power plants, but those should be getting relatively rarer.
Not to mention, fossil fuel power plants can have much better filters and some CO2/CH4 capture technologies, so the mileage you get per ton of greenhouse gas emissions is even better than the energy per ton of fossil fuels.
Changes on this scale take time. But to make the islands much less dependent on fossil fuels, a two-pronged strategy is in play. Reduce fossil fuel generation, but also reduce the dependence on fossil fuel in transport.
As a long-term strategy, reducing the cost of importing all that fuel, over vast distances, seems to be a huge win for the islands. In every way (politically, economically, socially, environmentally) generating their own energy is a win.
Literally the most unrefined and dirty way to create power, as long as the tourists don’t see it, and the EV owners that think they’re making a different don’t know, g2g.
Seems a pretty simple choice from my point of view.
We can either do drastic things now, or desperate things later.
Pollution and environmental destruction are big problems, but there are no remotely likely scenarios where the Earth "is wrecked by pollution" and a HN reader would need to question the viability of remaining on the planet.
If all their electricity comes from burning crude oil than they'd get about the same amount of miles in an ICE by refining that oil to gasoline for the cars and an EV by burning the crude oil for electricity, distributing that over the grid to drivers to charge their EVs.
However, about 22% of Hawaii's electricity comes from solar, so the EVs will come out ahead.
Even if we ignore solar and assume the EVs only use electricity from burning crude oil, the crude oil fueled generators should be cleaner than ICE engines, so there would be a significant reduction in total green house gases and particulates.
The all people here shitting on reality - are doing so because they’re defending their purchases.
Most people with EV as a primary vehicle were fooled into marketing that does not accurately reflect the product, and they don’t want to hear otherwise.
We don't actually want to scrap working cars unless they have reached the end of their life or passed an air quality threshold (UK tests every car over 3 years old, every year, called an MOT). Reduce, reuse, recycle etc.
Make streets narrower. Reduce parking. Return road infrastructure in favor of walkability, green areas, and reducing urban heat islands.
https://www.vox.com/future-perfect/23939076/norway-electric-...
Modern gasoline and hybrid cars are fine, banning them at this point in time would mean a drop in quality of life for negligible gain.
Hybrid cars might be good enough, but banning pure combustion cars from cities sounds perfectly reasonable to me. No real quality of life impact.
And how will all the people that are buying 500€ second hand cars afford electric?
Don't get me wrong, I think there is merit in a ICE free future, especially in urban areas, but the practicalities.. And I am not convinced the long term impacts of EV are fully appreciated necessarily.
Tyre wear isn't that important to me.
That's your choice.
We jack the car, pull the wheel, extract the screws, and use a tyre plug kit.
Howto repair tubeless tyres with plugs: https://www.youtube.com/watch?v=nCwWPlaghfs
Tyres with inner tubes can also be repaired, that's slightly more involved.
Again, that's your personal choice.
We've got off road and on road tyres we still use with four to five tyre plugs in them that have lasted a few years since their last puncture.
I'm in non urban Australia and have cars actively used with > 500,000 km on the clock. We were raised to maintain gear; be it cars, trucks, aircraft, excavators, bob cats, etc.
Understandable if you're rural though.
What I can say is that properly fitted plugs in the tread can last a long time with little leakage and that three or four plugs in the tyre tread (widely spaced, not all jammed in a big hole) seem to last a fair few years.
Annoyingly, plugs are not perfect either: after a tyre has been plugged I’m putting air in it like every 2 months, so anecdotally I guess the plugs leak really slowly.
Yeah a proper internal glue on patch would likely perform better in the shoulder but ain't nobody got time for that, that's like 90% of the work of changing the tire.
I've owned a Pirus (hybrid), Camry Hybrid and now a Rav4 Hybrid plus a MG4 EV.
The rav and MG4 are too new to count, but the other two I owned for about 10-13 years each.. we NEVER needed to change the brake pads.
Not once.
If you're having to change the brake pads on a car like this, you're a leadfoot with no core strength issues :-P
[1]: https://www.consumeraffairs.com/automotive/how-many-electric...
Not saying it's smart but when predictably decelerating on the highway I sometimes shift gears by rev matching and changing without even touching the clutch, for the fun of it.
I’d wager bordering on 100% of my clutch use is when coming to a complete stop.
Hence Quattroportes eating clutches like nobody’s business while the harder-ridden higher-power Ferraris don’t.
As such downshifting would not wear clutches much.
And anecdotally I’ve never suffered from or heard of engine braking causing clutch issues.
Idk how the Ferraris are different. They're lighter at least. Think they also have a different version of the "Superfast" software.
Anyway... I do engine-brake it. The real brakes appreciate not having to stop that limo by themselves.
Also, I have never ever had to replace a clutch, and I drive my cars way past 100k miles.
If your comment wasn't meant to imply that engine braking wears the clutch more than normal gearing, if you just want to avoid gear changes as much as possible, disregard this comment. (Although... I'm not sure that that's a valid worry, modern clutches last a LONG time when used properly)
You don't make it slip when shifting gear.
It wears the clutch but clutch wear is massively dominated by starts from a stop or other cases where you actively slip it any noteworthy amount so just rowing the gears up and down doesn't do much.
You can do it in an automatic, you just have to force it to select a lower gear using the gear number options (1, 2, 3, 4) or using the tiptronic mode. The lower gear means the engine will displace more air in the same amount of time, increasing the rate it pulls energy from the wheels.
People think you can't do it in automatics because they try very hard to keep engine RPM low where the effect is diminished.
If you release the compressed air without pushing the cylinder down you would lose that energy, but you would need a extra device to do so (by lifting a valve at the right time). This option does exist for large vehicles like trucks as a compression release engine brake [0], but this isn't something you'd have on a family car.
In a petrol engine you always want the same ratio of petrol to air in the mix that is taken into a cylinder. As you want to vary the amount of fuel, and therefore power developed, you have to be able to therefore limit the amount of air that is sucked in. Otherwise the engine would always run at full power.
There is a mechanical restrictor called a throttle plate that lives inside the throttle body that restricts how much air the cylinder can pull in (and therefore how much fuel is injected to get the same fuel/air mix). This is controlled by the throttle. When you are coasting, this plate is in its most closed position. This creates significant resistance on the intake stroke, and is where the majority of energy is lost during engine braking. This is also known as a pumping loss.
Diesels always intake the same amount of air, so they can compress it enough to autoignite the fuel. They vary the amount of fuel injected to the same volume of air. This means no throttle body or plate, so unless an extra exhaust restrictor has been added there is minimal engine braking on a diesel engine.
[0] https://en.wikipedia.org/wiki/Compression_release_engine_bra...
Though the ECU would be doing the AFR management on modern EFI engines as the injectors aren't vacuum operated like Carburetors were. You should be able to cut fuel injection when coasting in a modern engine, can't run lean if there's no fuel at all. Not sure if carbs could do the same.
More modern engines have electronically controlled throttle plates, and this is definitely somewhere you could do something clever like you suggest - cutting fuel flow but also maximising airflow when there is zero throttle input.
I assume engine braking is generally considered a beneficial thing by manufacturers, but it could be fun to be able to customise the amount. Or do something like have the braking come on gently at first then harder. Maybe even try and have a linear or flat response curve vs. engine rpm.
You can do this by letting go of gas pedal slowly. I have "current amount of fuel used" info in my car (liters/100km), it shows pretty clearly, that when going fast and slowly letting go of gas, amount of fuels slowly goes to 0. If I let go of gas fast, the engine is intelligent enough to not close throttle as fast as possible, still probably takes 1 second.
> More modern engines have electronically controlled throttle plates, and this is definitely somewhere you could do something clever like you suggest - cutting fuel flow but also maximising airflow when there is zero throttle input.
They cut fuel flow and close throttle plate almost completely but still allow some small amount of air, in order to actually do engine braking. If you need to coast, you can apply clutch in manual. Don't know that much about automatic, but from what I've driven, they use "lift gas" as a "engine braking" signal, so probably they can't really coast that good.
Funny because the cars build dates are only 2 years apart, 2005 and 2007, and they're both K20 engines but the engines handle so different.
The OEMs try real hard to prevent this because the amounts of emissions byproducts that aren't water or C02 they're allowed to produce are on the order of single digit grams per multiple miles (you can mentally file it as "about the baseline air quality in urban areas" though the rules are hugely more complex than that) so these edge cases matter.
Some recentish motorbikes have an option to customise the amount of engine brake, I suppose cars could have something similar, too.
You don't want to do this. Much of the engine braking effect is from pulling the intake air charge past the mostly closed throttle plate. On a car with a wide open throttle plate [even with no fuel], the engine is acting more like a spring than a damper. On the intake stroke, it will pull an intake air charge past the small restriction of the open intake valve(s), then compress it on the compression stroke, then release that compressed energy on the "power" stroke, then exhaust it past the small restriction of the open exhaust valves. Pushing air past the valves will cost energy, but it's not much.
This is why diesel trucks' engine braking works differently. (Diesels don't have a throttle plate.) They can open the exhaust valves to prevent the energy recovery in the "power" stroke to create a higher net braking force. Jake Brake: https://en.wikipedia.org/wiki/Compression_release_engine_bra...
It's basically like an air compressor that just keeps running despite hitting max pressure and every pump just goes out the blow off valve.
Toyota Sienna 2015 - the braking effect is unfortunately minor.
Using the numbered gear options will enable clutches/bands that provide more engine braking.
For example, if I brake somewhat hard from 130 km/h to 90, it will downshift from 6th to 5th. When riding normally, it would stay in 6th down to around 50.
Even with paddles, there's a delay, or it briefly goes neutral, or it doesn't rev-match well. Or you can't double/triple-downshift, which is worse when you have 8-12 gears. Allegedly wears them down faster too, which idk but would not be surprised if it were true given how unhappy it feels.
It’s just trivially easy with electric thanks to regen braking.
Though with modern cars getting heavier if you have a small ICE these days you have almost no engine brake which makes some cases more difficult (unless it’s a mild hybrid with an electric kers like some of the small engined fords). SUVs tend to have giant engines and pretty high rolling resistance, which I’d think would somewhat compensated for their higher inertia.
It’s all about learning your car’s behaviour and planning for it.
Your very old tires makes you a serious threat on the road while completely oblivious about this fact... not cool, please change them if you drive on public roads, if not for you just for the sake of others.
I just trashed some 15yo Firestones last month, after wearing them completely bald of course.
My manual car could do this 20 years ago. My fully ICE motorcycle can do it today.
I know engine braking is cool but it’s not some amazing new thing only EVs can do. Altho granted it only produces heat and noise in petrol vehicles. But it also makes your heart sing so that’s nice
2 kWh for the drivetrain
809 Wh regenerated
On the way home: 2 kWh for the drivetrain
547 Wh regenerated
For the round trip that's 33% less energy use than if the car did not have regenerative braking.I'm mostly happy about that but there is one thing that annoys me. 33% is close to how much a kilometer is shorter than a mile (38%).
Why the fuck would I care that these two numbers are that close? It is because of a mystery in the Hyundai app. When you look up the trip details for an EV trip it gives you mileage, duration, and energy use (drivetrain, climate, accessories) and regeneration.
The mileage is substantially less than what the car shows. For example for the aforementioned trip home that trip odometer shows 8.0 miles but the Hyundai app shows 5 miles. The car odometer has the correct distance.
There are two theories to explain this.
1. The app is showing how many miles worth of energy you used rather than your actual trip mileage. All the other data it shows (except for the duration) is energy related. For my 8.0 mile trip I got 3 miles worth of the energy the drivetrain used back via regeneration, so I only actually paid for 5 miles worth of electricity.
Based on the Wh given it should actually be 5.4 miles, but the app only displays integer mileage so 5 it is.
2. It's a botched unit conversion. E.g., the car uploads the data in miles but the expects the data to be in km, so it is doing a conversion. That would turn the 8.0 into 5.0, which would be 5 in the app and so matches what theory #1 predicts.
I've checked several of my trips and they have always happened to have the right amount of regeneration so that the two theories match due to the app only showing an integer mileage.
I did a test today to try to tell them apart. I changed the car's settings to km and took a trip. The idea was if the car had been uploading in miles that would hopefully change it to upload in km, matching the app's expectation, and so the miles shown in the app would match the actual miles of the trip if theory #2 was correct, and show the regeneration corrected miles if theory #1 was correct.
The result was that the app still showed miles consistent with theory #1. So mystery solved, right?
Maybe not. When the car was set to miles everything showed in miles. Speedometer, odometers, efficiency (mi/kWh), speed limits it read from traffic signs, and speed limits it gets from the map data when using navigation on highways.
I expected than when I switched it to km all of those would be in km, and I would not see miles anywhere. Also, I expected that when it saw a speed limit sign that said say 60 it would interpret that as 60 km/hr.
What actually happened is that miles mostly did go away, except on the speedometer it added a smaller mi/hr display under the km/hr display. For the traffic signs it still knew they were in mi/hr and it converted them, so when I got on the freeway as soon as I passed the sign that said 60 the speed limit sign shown on the instrument cluster said 97, and the red dot on the speedometer showing the current limit was placed in the right place.
That suggests that the car knows it is in a country that uses miles, and doesn't just go by whatever the units setting in the setup screen is set to. It could be that in miles countries the car also uploads in miles all the time, and so switching the units setting to km would not change the results if theory #2 was true.
Now my plan is to find a big parking lot that is mostly empty overnight, such at a Walmart or Home Depot or a mall, go there and turn the car off and then back on which starts a new trip, set regeneration to 0 which turns off automatic regeneration on the accelerator so the car only regenerates when you use the brake pedal, and then drive around the parking lot for about 10 miles without using the brakes, then coast to a stop and turn the car off the end the trip.
Then I'll turn it back on, drive home, and check the trip details in the app. If theory #1 is right then the miles in the app should match the odometer miles. If theory #2 is correct the app miles should still be 38% shorter than the odometer miles.
With an EV I don't touch breaks unless in situations I fail to/couldn't predict (maybe up to 10% of all speed reductions and even less stops).
Oh all the time. I used to drive like a typical youth. I've been in USA for 10 years now and still hate driving automatics because they shift into too high a gear and then you have to constantly use the brakes. It's annoying.
Are you comparing to an automatic ICE or a manual?
In my experience of driving EVs their engine braking is sub-par to what I'm used to at least from my motorcycle. Bikes have silly high compression compared to their weight. You def have to be careful about chopping the throttle.
I also like the noise, but it is noise pollution that is very annoying to everyone else.
(They also don't do blending between friction brakes and regen, so the cars behaviour when letting of the accelerator is highly inconsistent depending on temperature and charge level).
One of the reasons I long for the lease on my Model Y to end so I can replace it with a less stupid vehicle.
Many thousands kilometers later I hate it almost as much as at the start, so lack of regen configuration will be a dealbreaker next time I pick a new car.
1. It is inconsistent, especially during winter and when fully charged.
2. Crossings with shrubbery/objects that hides approaching pedestrians/cars/bikes and it is rare that there is anyone actually crossing. I encounter these several times per day.
My preferred way of approaching #2 is to reduce speed well ahead, start gliding and put my foot on the break pedal to be ready for a complete halt in the rare case (once in a 500 maybe) that I need to give way to someone. In the Tesla I must reduce speed to almost standstill and creep slooooowly, since it would take half a second to move the right foot to the break.
I understand it sounds like an extreme corner case, but for me it is all the time every day. Central Scandinavia.
I want my right foot on the break pedal, ready to brake hard and fast in the rare case that something comes across the road.
I don't want to reduce speed any further than is necessary to have a safe breaking distance at fully ready state.
With any other car (that I have driven) than the Tesla, I can approach a situation like this at between 20kmh and 40kmh, depending on the specifics. In the Tesla I need to go at between 5 and 10kmh.
I generally turn off the auto regen braking because i find it uncomfortable.
Importantly, regenerative braking is a danger on icy roads. I disable it entirely in the winter in eastern Canada because it often causes the tires to lose grip.
They didn't care much for convential wisdom and car building competence in the early days of Tesla.
> was difficult to get used to
To ask the obvious, how used to something are you going to get on a test drive? It takes time.
The key takeaway is that there are differences to driving an EV to driving an ICE vehicle. Equally those differences are in fact easy to adjust to given a bit of practice.
Of course cars have always had different control options. Automatic and Manual gearboxes spring to mind. When I first learned some cars had a gear selector as an arm on the steering column, and so on.
EVs like a somewhat gentler foot, because the torque is instant, so a heavy foot is likely to be a more uncomfortable ride.
So yes, different cars, different styles. But of course we adjust very quickly, and its not really difficult to drive anything- it just takes a bit of practice.
All to say, check out a few to be sure, im still shocked how much i love driving this thing (and how criminally fast it is, totally absurd).
Secondly, I rented an EV for a week and by the end of it actually preferred the strong regen setting. It was convenient in stop-start traffic, and on a twisty road, you could use it to tighten the nose as you entered the corner.
Are you not? Do you drive by blipping the gas every few seconds?
I've had Uber drivers do this and it is annoying bordering on nauseating as a passenger. It is probably pretty bad for mileage and transmission wear as well (constantly taking up and releasing the backlash in the gears).
For example here is how it works in Hyundai EVs (and I'd guess Kia too). It is easy to set them so that they drive very similar to an ICE. I believe several others also work similarly. There are only a few that try to really push you to one pedal driving.
1. When use explicitly use the brake pedal that car uses regenerative braking unless you are trying to stop faster than regeneration can handle in which case it will also use the friction brakes.
There may be a setting somewhere in the settings menus where you can adjust how strong the braking is, but I don't remember because the way the car comes from the factory the brake peddle feels a lot like an ICE car's brake peddle.
2. There is a regeneration level setting that controls what happens when you ease up on the accelerator or remove your foot from it. This setting has 6 possible settings: Level 0, 1, 2, 3, i-Pedal, and Auto.
There are two paddles on the steering wheel that let you move through these settings quickly and easily, and you can do this while driving so you are free to pick whatever setting fits the conditions and your mood the best. Here's what they do.
• In level 0 there is no braking associated with the accelerator. Take your foot off and the car coasts is if it was in neutral.
• Level 1 provides a small amount of automatic braking when you let up on the accelerator. In ICE terms it is similar to the engine braking you would get on level ground going fast enough to be in 3rd gear in a 3 speed automatic. You slow down faster than coasting, but not so fast that if you were on the freeway and your felt the need to shake your right leg around a little it would slow enough to be a problem.
• Levels 2 and 3 step up the amount of automatic braking. 3 is enough that in city driving most of the time you can be quite leisurely when it comes to moving your foot from the accelerator to the brake at most stop signs, but it will not bring your car to a complete stop. It will get quite slow and then creep at that speed.
• i-Pedal is one pedal driving mode and corresponds to what that EV you test drove was doing. In this the braking is similar to level 3 as far as aggressiveness goes, but it will take you all the way to a stop most of the time. Once you get used to it you should be able to do most city driving and most highway driving without touching the brake pedal. About the only times you would need the brake pedal (outside of emergencies) is if a light changes on you when you are too close to the intersection.
• Auto mode automatically switches between 0, 1, 2, and 3 based on the distance to the vehicle in front (using the same system that adaptive cruise control uses) and the slope of the road. If you are on the freeway for example with a good distance between cars it will be in 0 or 1. In the city where you are close to the next car it might be in 2 or 3.
• If you press and hold the "increase regen level" paddle for at least 0.5 seconds it will switch from whatever your current setting is to i-Pedal and stay in i-Pedal as long as you continue to hold the paddle. Release the paddle and it switches back to whatever your previous setting was.
This system gives you plenty of flexibility and you should be able to easily find a setting you like. Some people really like one pedal driving and so they can just put it in i-Pedal and leave it there (with a slight annoyance...when you turn the car off in i-Pedal it comes back on in level 3, so you will have to hit the regen up paddle once).
Some people set it to one of the numbered levels and leave it there (again with slight annoyance at startup where it comes on at 1 so they need a paddle flick or two).
Some people use the paddles instead of the brake pedal, mixing levels to get the kind of deceleration curve they want.
I normally drive in level 0, with an occasional day or two in i-Pedal just for a change of pace, but if I'm coming up on a series of roundabouts I might switch it to i-Pedal. That's great for say a 35 mph road with 10-15 mph roundabouts every couple of blocks. (If it is just one roundabout I'd probably use the "hold regen up paddle for 0.5 seconds" option to just turn on i-Pedal for that intersection.
This seems a bit exaggerated. Staying regenerative-only does require sticking to about half or so of how fast I could stop, but so far that seems to work fine unless a light turns right in front of me or traffic acts up. Usually it says it gets high 90's or 100%, and it didn't go below 50% even when a stoplight did turn at exactly the wrong time. (2022 Ford Escape non-plug-in hybrid, recently bought used.)
It's NOT relevant to overall (tyre, brake system & engine braking & regen braking) braking system performance since that's a dynamic value variable over many factors constantly.
Bigger battery is more capacity sure. But their point was that even without a big battery they have enough capacity to get close to maximum effectiveness, contrary to ajross saying that a hybrid's capacity is "not really" effective and "at best" helps "some".
braking system = circa 1G of deceleration possible (depending on tyres, coeff of friction, temperature, ... etc etc)
So max effectiveness is unreachable for any regen system on a consumer car hybrid or ev, by a factor of around 6x i believe?
With recognition of the mistaken framing (near max effectiveness) we're back to the larger ev pack has a greater ability to sink current, a larger ability to slow the vehicle than does a smaller battery (obvious considerations about inverter capability, wire gauge etc etc aside)
Their definition of effectiveness is the percentage of braking force that turns back into electricity and goes into the battery. If your regen system can only do .15G, but 90% of your braking is under .15G, then you'll have about 94% effectiveness by that definition. 94% is not max but it's near max.
It's not about what happens during peak braking, it's about what happens over entire drives.
And when they say "half or so of how fast I could stop" they're underestimating, that's a comparison to a normal but aggressive stop, not pushing the pedal into the ground.
Every other EVs and HVs assign first half of brake pedal for regen and bottom half for mechanical brakes. Tesla uses bottom half of gas pedal for the same, which eliminates the need to accurately determine the appropriate pedal force that corresponds to intended braking force to be added up with regen to match intended deceleration. Mapping regen to gas is `set_motor_torque(1.25 * gas_pedal - 25);` and that's much simpler.
Hybrid makers just don't really care about that.
And it's not a problem when you get used to regenerative-only braking distances, which are surprisingly long at highway speeds.
It only becomes a problem when idiots thinking "the shorter the distance between first and last car, the smaller the traffic" start cutting you off when you leave enough distance for regenerative braking.
Part of the point, not the whole point. Regenerative breaking is absolutely a win; but there can also be a significant benefit from allowing the ICE to remain in the RPM "sweet spot" rather than moving around a larger range.
edit: Thanks for the correction. They do indeed use resistors and just dump the energy as heat. Unfortunate.
Hopefully this will change as supercaps continue to improve. Maxwell tech's modules are already used in light rail, and looks like some work towards smaller locomotives in Switzerland here:
Dynamic brake
i believe there is also a chinese company which is making such a car, their cars have nearly 1000 miles range.
Close: they have the highest efficiency at about 90% of maximum torque for most of the RPM range. So if you want double the power, you want to be able to double the RPM; and if you want half the power, you want to be able to drop the RPMs in half. To pull this off, you either need a very quick shifting gearbox or some sort of CVT.
This is also why automatic transmissions, despite being ~80% efficient versus ~95% manual transmissions, are not much worse on mileage. Because they can quickly switch between low RPM and higher RPM (first by torque converter lockup, second by switching gears).
There are a handful but most hybrids are either parallel or series-parallel. I assume because the power range is so low that the conversion losses are way too noticeable compared to a mechanical drivetrain.
Honda even recently announced that they're scaling back on electric to focus on hybrids:
https://www.reuters.com/business/autos-transportation/japans...
[1] https://www.bloomberg.com/news/articles/2023-12-19/hybrid-ca...
The Toyota Prius powerchain has two motor generators, and can take part of the ICE power from one and transfer it electrically to the other, remapping the engine RPM into more efficient power bands at the same time. It has a mode that can do this even when no power is being used from the battery.
It’s kind of a best of both worlds. They can avoid the extra weight of a full series hybrid, because they don’t need a motor generator pair that handles the full engine power.
Actually, power bands remapping is essential for the Prius to operate.
There is no clutch, there is no neutral gear, there is no torque converter. The ICE is always connected directly to the wheels with a fixed gear ratio on a planetary gear set. (Which improves transmission efficiency over a automatic/CVT gearbox, and actually reduces maintenance costs)
One of the motor-generators is on the 3rd input of the planetary gear. For the ICE to idle (during warm up, or when you have the heater on), the motor-generator much be spinning backwards at the exact same speed so that the wheels stay stationary.
Power band remapping can also be used for reversing when the battery is empty.
https://www.youtube.com/watch?v=QLUIExAnNcE has more info.
But then, do you end up removing enough battery weight to offset the weight of a whole ICE?
I hate to break it to you but something like a Rogue or HRV does circles around an Altima or Civic when it comes to daily flexibility and utility for a fairly paltry additional cost. It doesn't take a degree in rocket surgery to figure out why they fly off the shelves. For the average person they're a good combination of attributes.
A practical car is a station wagon, not an SUV, many of which have less storage space.
Please, cut the needless snark. People do buy vehicles for edge cases but the lack of smaller, practical vehicles is driven is large part by manufacturer profit.
I agree that there's a lot of stupidity going on when it comes to station wagons vs crossovers vs compact SUVs and the OEMs really do SUV-ify a lot of things that ought not to be.
The shape of these vehicles is fairly preordained by the nature of the fuel economy regulations and wind resistance and other regulations that apply equally to all of them. You're not gonna find "more space" in something like a Subaru Outback by squashing it on the vertical axis unless you stretch it in another dimension or find somewhere else to find space. Maybe you might be able to eek out a slightly better angle on the hatch or something but it ain't gonna be much. Fuel economy regulations make cars with thicc asses like the big sedans and station wagons of yesterday nonsensical.
The snark is not needless. It is tautologically impossible for the overwhelming majority of people do be "doing it wrong" on a matter that is in large part a subjective one of preference. If someone wants to assert that then I will talk down to them.
People buy these small SUVs left and right because they're seemingly the best option when it comes to well rounded boring A to B vehicles.
Toyota is the biggest seller of HEV's, Stellantis of PHEV. That's the difference. EV's on paper should be the most reliable, but Tesla is the biggest seller of those. If you want reliability, choose by brand rather than engine type.
Mostly issues with 12V battery, it seemed like.
In the end I bought a Stellantis EV so I probably deserve everything I get - but they are cheap!
Eh, it's not so much nonsensical, as it is that you're just misinterpreting the data.
This conversation here is specifically about powertrain reliability, but that isn't what consumer reports measures. They measure complaints about any feature on the vehicle, including ancillary accessories unrelated to the vehicle's ability to transport people.
But also as you point out, shitty engineering (Stellantis's specialty) is a bigger issue than any particular drivetrain type.
Just think - if two drivetrains were less reliable, wouldn't you see that with the Prius?
On the other hand, a Toyota hybrid doesn’t have a gearbox at all, not even a CVT. Instead it has something similar to a differential, it’s mechanically simple and very reliable. It uses the electric motor in place of a turbo, so that’s another common failure point removed. It doesn’t have a starter motor, and the Atkinson cycle engine should suffer less stress than an equivalent petrol.
Practically the biggest problem is finding a 3rd party garage who will inspect the hybrid parts as part of a service.
In 2010 with the Chevrolet Volt.
They go test-drive cars, probably glance at performance specifications and/or read/watch a test drive review of the cars. They can look at the 0-60mph/0-100 kph times and get a feel for "this car will be able to get out of its own way" vs "this car will be a rolling roadblock".
So "actually understand"? Maybe not, but "understand enough to guide their purchasing decision?" and therefore enough for the actual automobile product teams to design to accommodate? I think they do.
Toyota Yaris - HSD - 1.5L 4cyl Renault Clio - E-Tech - 1.6L Hyundai Kona (SUV) - 1.6L Honda Jazz - 1.5L Peugeot 208 - 1.2L Peugeot 3008 (SUV) - 1.6L Peugeot 5008 (Family SUV) - 2L And the list goes on. Even BMW with it's xDrive puts out 1.5L engines.
Huge engines are only common in two places: sports cars (and even then, only a specific category like AMGs and friends, because even a Porsche 992 only has a 3L engine) and the US.
1.5L is an incredibly small engine, especially when previous versions required much larger. The Renault Scénic IV is a 1.5 ton brick that is happily running on a 1.2L engine. The Scénic II's most sold motorization was a 2L engine.
edit: oh it was mine heh, my first car was a 1979 ford with a 460 ( 7.5L v8 ). It was a hand me down from my grandfather, he said if i could get it running i could have it.
Like absolutely, unless you consider 1.4L petrol engine large for something with over 170KW (over 220hp). Such kind of offerings are quite common at the East side of the pond.
I have no doubt that some people behave as you describe, but I think some of that is driven from a rational position of not wanting to buy a car that is incapable of anything more than their normal daily driving. If you need to accelerate quickly to merge safely into traffic, bringing only 75 [or 71] peak horsepower to the table isn't a comfortable position to be in.
I hired one on holiday and it worked fine. Maybe I'm getting old but I see less point in getting something that does 0-60 in 4 sec when most traffic goes from 0-40 in about two minutes and doesn't get much faster. It still has a top speed over 100mph.
So what is the well to wheel efficiency of this vs. pure electric? There are fuel transportation losses in one, and transmission line losses in the other. In many cities electricity is quite a bit more expensive than gas so hybrids are a better deal financially.
Which is why I'm surprised electric cars with range extenders aren't a bigger thing:
* https://en.wikipedia.org/wiki/Range_extender
Have the powertrain be all-electric, and have a battery pack, but for those with range anxiety have a small generator as an option that would go in the frunk (front truck). A (proverbial) small Honda EU2200i would be less maintenance than a traditional engine.
> The LEVC TX is powered by a full-electric hybrid drivetrain. It drives in full-electric mode all the time, but is recharged by an 81-horsepower (60 kW; 82 PS) Volvo-sourced 1.5-litre turbocharged three-cylinder petrol engine.
The #1 reason for (european) companies not buying full EV vans is range, they need to drive a LOT during the day.
REX would solve that with minimal emissions. And depending on the battery size, they could drive on full EV in city centres and only allow the REX to charge the battery during longer drives.
The BMW i3 REX is a fantastic car, if you can find one, buy it.
I think a Diesel indirect injection REX would be awesome. It could burn vegetable oil, which is more viscous, but indirect injection doesn't need to atomize the fuel as much.
Could you expand on this? What was the actual problem? For example, did the range extender start and run? Did it put any energy into the battery at all?
I don't know what to call this.
"Legislated fragility"
Assume the car gets 4 miles per kWh delivered and the charging cycle is 90% efficient (measured from generator output). The 2.2kW generator can add 8 miles/hour of generator runtime (2.2 kW * 0.9 * 4 miles/kWh).
For range anxiety of the form "we're driving to a destination pretty far away and I'm not sure we can get there", that's not very helpful. For range anxiety of "I'm driving to a destination that's over half my range and then going to spend a full day [or overnight] there, but I'm not sure there will be working chargers available there", charging 8 mph times 8-10 hours is very helpful.
Worrying about being stuck in the boondocks without a charger is addressed by an 8 mph on-board charger, but I think that's the less common form of range anxiety.
The Chevy Volt range extender was 75kW; the i3's was 26.6kW. 2.2kW is literally an order of magnitude too small to replace those.
Also, something I didn’t mention in my post; at full power they’ll suck their tank dry in a little over 3 hours. You’ll get about 20 miles of range (using your assumptions above) from one. Tbf you can also parallel two of them, or buy a slightly larger model (EU3200i), but either way, it’s still not going to be anything other than an emergency backup where you have a lot of time to kill.
Re: maintenance, small engines typically are pretty needy. That one wants an oil change, spark plug gap adjustment, and spark arrestor cleaning every 100 hours of use. The latter two are only usage-based, but the oil is time-based as well (6 months) since it oxidizes, and suffers from fuel dilution. Then there’s the fuel: god help you if you put ethanol gas into a small engine and let it sit for any period of time. It’s often difficult to find E0 fuel, and while there are external fuel tanks for generators that can hold quite a bit, they also tend to vent vapor in the heat (as does any tank, including a car’s), which is unpleasant when it’s in your frunk.
Finally, engines of all kinds really don’t like being left sitting for months on end unless prepared to do so. Generally you want to run them monthly, getting them up to operating temperature, putting a load on them for a bit to fully exercise all components.
I say all this because I have an EU2200i and dearly love it, but am also painfully aware of its limitations and needs. I got it when I lived in Texas because the power outages were getting to be absurd, and my house wasn’t plumbed for natural gas, so a whole-house was out of the question. The 2200i was plenty to power two fridges, a deep freezer, TV, fans, and my server rack. I got really good at quickly running extension cords (which is a whole other discussion on ensuring proper amperage ratings and calculating voltage drop, something most people ignore).
proverbial
Today, if I run out of petrol|gasoline somewhere, even if I'm in the middle of nowhere and don't have a gas can, I can still recover from that situation within an hour or so (hitch a ride to the next gas station, buy gas can, fill with gas, hitch back to my vehicle). With an EV the density of fueling/charging locations is orders of magnitude lower than for gas, and if I end up discharged I'm looking at finding a flat bed truck, or perhaps a mobile high power generator.
Disclosure: I own both kinds of vehicles.
As dboreham says in the sibling comment, the range anxiety morphs into charger-availability anxiety. Even if I know a charger physically exists at my destination, if it's 45% or more of the range away, I still need to worry that it will be working, that my access will work, that it won't be occupied or blocked, etc.
In nearly 40 years of driving, I almost never researched gasoline availability (through the Nevada desert and in Central America, I did).
In a little over a decade of BEV driving, I've done a lot of EVSE (charger) researching.
I've had my BEV for about 5 1/2 years. My first road trip (Portland -> Santa Clara, ~560 miles each way), I planned it out ahead of time with ABRP. These days, I'll just let the nav figure it out.
I have been totally unconcerned about it since.
You’d need to tow around a 7.2kW 240V for 30A at 240V (more likely a 14.4kW generator for 240V 60A).
Using the small Honda inverter generator (which is amazing for plenty of stuff!) is akin to covering your car in solar panels to get range extension, the math just doesn’t work out.
The "gas pedal" becomes a "I want to go faster/slower" pedal, its position has zero impact on the RPM.
As an anecdote: A security company I know only buys Toyota Hybrids for their guards just because of that. They have a habit of driving cars like they stole them and normal ICE cars break down from that kind of abuse. Hybrids won't let you abuse them, they pick the RPM and you deal with it.
(They also swap the passenger seat for a plastic box because the guards threw heavy crap like safety boxes on it, wearing down the seat in months)
I'm also surprised for the first few minutes when I drive it how little "engine braking" it has (my habit is from riding a big motorbike).
Both will rev on neutral, but when the gear selector is on Drive there is no link between the pedal and RPM.
With other hybrids: depends on the generator they have installed, but it matches the consumption in amps by the engine in order to "go" if it is not directly coupled with the transmission, or they just downshift to accelerate with help of the electric engine.
I am assuming a lot here: Toyotas (specially RAV4) mount CVTs among others, assuming pure electric generator by the ICE or coupled to it... So it depends a lot on specific configuration.
I know it's not exactly the same, but I was a teenager and curious, and you can rev them and shift into drive with some heel-toe finesse. Not sure if this works on the newer ones, this one was an early 2010s model.
Trees, multiple motorcycles, final destination esque road debris, an accident that should have totalled it if not for an insurance mistake, leading to repairs worth more than the car. Three teenage drivers and two adult drivers with heavy feet. Not to mention many many hardware store runs hauling various sacks of yard materials, baby trees, lumber, etc.
My favorite times were rallying on compacted un-plowed snow. The thin tires and light weight meant it absolutely shredded.
It's my opinion that the Toyota Prius is one of the greatest vehicles ever built and they should be respected and feared.
China has banned "one pedal driving" as a default.
Regardless, your point stands. People that have gotten used to not directly using brakes to indicate you are slowing down is a dangerous thing with how reliant we are on the standard indications that you are slowing. All the more so if you need to rapidly lose a ton of speed, where even regenerative brakes often fall back to friction.
Most, if not all, EVs will light up the brake lights when you're slowing via regen braking as long as the deceleration rate is above a certain threshold. I know my Tesla does.
Emergency brake systems probably help a lot with this problem, of course. Still seems wise to follow some of the older practices that we used to drill into people.
Losing muscle memory of pressing the brake pedal. Makes sense, actually.
There are some really good videos out there going over how newer CVTs work. Looks like some people are working on ones that are teeth driven, to reduce the loss from being free belt driven. Borderline magical stuff, all told. (Obviously, not magic magic. But very very impressive designs.)
From a mechanical engineering standpoint, the Subaru CVT uses a fairly conventional lock-up torque converter at the input, but that gets locked as you pass something like 15-20 mph (once the lowest gear ratio is satisfactory w/o the torque converter function) and beyond that all shifting of the CVT is done w/ the torque converter locked. In addition, the clamping force of the sheaves is adjusted per the torque load of the transmission to minimize the frictional losses.
Anyway I'm curious about data comparing efficiency of conventional and CVT automatics.
The videos online that look at various CVT systems is truly an amazing resource that I regret not having when I was younger. :D
This would be similar to hitting the optimal torque point. The idea there would be that you can get out of the acceleration phase faster, so that you can transition to a more efficient gear to maintain the speed for longer.
The wikipedia looks to cover this well. One of the cites is specific on the efficiency of the CVT. I think I overstated how much higher the loss is, so maybe that is confusing things? I thought it was 10-20, but the cite on the page shows it solidly around 10.
Interestingly, my car gets better gas mileage around the 40ish speeds than I do at full highway speeds. That somewhat surprises me. It is very dependent on not having a heavy foot, of course.
The main reason why city mileage is usually lower is because of all the stopping.
They use a series-parallel hybrid transmission which is sometimes called eCVT, but works completely different from a classic CVT. There are no pullies, belts, chains, none of that. What they do have is a couple of motor-generators and a differential to link the system up with the engine and the drive shaft. No friction losses like CTVs have.
See https://prius.ecrostech.com/original/PriusFrames.htm, or look up "Hybrid Synergy Drive" on Wikipedia or Youtube or your favorite search engine.
Is fascinating to watch these things work.
A direct mechanical connection is more efficient at highway cruise speeds than a mechanical->electric->mechanical conversion.
The main win a gasoline hybrid has is in running the Atkinson cycle gaining efficiency while losing torque which the electric motor makes up. This brings the gasoline engine up into diesel efficiency territory.
This is also why you don't really diesel hybrids, the engine is already very efficient but it is more expensive and heavier and hybrid adds more expense and weight.
Though H/K have recently introduced a new hybrid system with a CVT, so maybe 2026 or 27 model years will be different.
Since I'm only making one comment, I also want to say hybrid cars are better than ICE because there are fewer belt-driven accessories. Aircon in particular on an electric motor is a big improvement. Without the idling engine producing heat, hybrids are much nicer in hot stop-and-go conditions!
Also my Prius made it its whole life (200k miles and ~20 years) without ever changing the brake pads... amazing!
Toyota and Lexus, obviously, use eCVT in their cars.
Honda is also in eCVT camp for most of their models but for example new CR-V has weird setup. It acts as an BEV until ~80-100kmh and then shifts completely to ICE with a single gear. While in EV mode the engine is constantly charging batteries.
Then you have KIA and Hyundai with their dual clutch setup in all HEV and PHEV range.
I find it a pity that Lexus uses CVTs as I would probably sell my BMW 330e and get a Lexus.
> The gas engine has maximum efficiency at about 80% throttle.
ICE efficiency varies in multiple dimensions based on load and RPM, and in a series hybrid, you have some ability to dynamically influence these... throttle would be one of those inputs.
However in practice the vast majority of hybrids do not use this approach and have motors that vary RPM with road speed (depending of gearing of course).
The common case of maintaining ideal RPM is the CVT, which most folks dislike, so much so that some models have a switch to pick how many fake gears you have to break up the boring drone of a constant RPM engine.
BTW, the chevy bolt was advertised as a serial hybrid, right up to the day it shipped.
I believe the most common serial hybrid today is an EV with a range extender.
Also known as breaking. You could just do that once in a while.
Car producers can and do resolve this, e.g. iirc Audis don't use recuperation for the first breaking of the day. That way you don't have to remember to use the no-recuperation/break cleaning mode or break unnecessarily hard every now and then.
(When I say "the manual", I mean both the manual of my previous car which was a hybrid Toyota Auris, and my current car which is a fully electric Volvo XC40.)
It's 2025 and hybrids have enough software to automate some non-hybrid braking action.
* https://www.dictionary.com/e/brake-vs-break/
The two words are:
They’re enclosed so they don’t get dirty, the inner face of drum will rust less than discs, fade is not an issue thanks to regen braking, and before they get too hot and fade drums will brake harder than disks (thanks to a higher pad surface area). And they’re enclosed so they also keep the brake dust inside the drum, making it easier to dispose of safely.
Drums are heavier tho.
> They should add some “brake cleaning” mode to temporarily disable regenerative braking.
Some manufacturers do that (iirc tesla calls it burninshing, others will switch regen off completely if you switch to neutral or something).
I've read that Audi and Porsche will use regular brakes once or twice at the start of every drive instead of regen, I assume using electronic control to imitate the current state of regen braking.
But I understand the factory tires are a bit stickier to create a quieter ride which may be throwing more rubber dust into the air. High torque launches don't help either. ;-)
> As of the end of June 2025, there were 2,450,462 plug-in cars, with over 1,585,000 battery-electric cars and nearly 865,000 PHEVs, registered in the UK.
> There are more fully electric cars than there are plug-in hybrids on UK roads and the gap has been widening. In 2021, fully electric cars accounted for 60% of all plug-in cars but with the increase in options, range and popularity of fully electric cars, and by May 2025 this has increased to 65%.
(That stat does exclude non-pluggable-hybrids, but those are kind of pointless stalling of the transition off petrol)
https://www.smmt.co.uk/more-than-a-million-evs-on-uk-roads-a...
We have a selection of smaller popular hatchbacks with MHEV available (ie, the Hyundai i20) that I believe were not released in some markets
The leasing culture for "luxury" cars is quite prevalent here too, and many new cars from popular brands such as Land Rover are at minimum MHEV from new nowadays, in order to get fleet emissions down
Hybrid cars have smaller motors, inverters, and battery packs - and none of those components can absorb 940 horsepower!
A 2nd gen prius battery for example has a max in/out of 30 horsepower.
Some cars it's quite an abrupt change from the regen braking to the hydraulic brakes.
Also is it only pedal braking? Or does it "fake" things out if you use one-pedal driving?
Quote from the actual report:
> As the level of electrification of a vehicle rises, the dependence on regenerative braking also increases, thus lowering PM emissions from brake wear. Based on recent evidence [30], regenerative braking can reduce, in the worst- case scenario (i.e. highest usage of mechanical brakes or equivalently lowest usage of regenerative braking), brake wear emissions by 10-48% for hybrid electric vehicles (HEVs), 66% for plug-in hybrid electric vehicles (PHEVs), and 83% for battery electric vehicles (BEVs
Tire wear is an extremely strong function of torque. If you accelerate and decelerate calmly then the stiff tires they put on EVs will last a long time.
A lot of people drive EVs extremely aggressively because the motor provides a ton of instant torque and they find it fun.
The human suffering and ecological impact reduced if only there would be a focus on enforcing speed minimums...
Let me guess this straight, the plan would be that:
1. in a global environment (the following steps are done everywhere around the world)
2. where maximum speeds, though:
- clearly marked everywhere
- mentioned during driving lessons and driving codes/books
- part of the written driving exam every driver has to pass
- enforced by police, cameras, a myriad of automated systems etc
3. are still ignored by, say, 40%+ of drivers
... so, the plan would be that in this environment, mandating minimum speeds would actually improve anything? :-)))
I'd be super happy to read the study proving this. Where by study, I mean actual physical trial.
Exactly. Rush hour is like dumping 5gal bucket into a sink. You'll always be bottlenecked by the drain but a better drain will mean all the drops get where they're going faster and with less waiting around.
What we need is fewer cars and better shared transportation.
Heck, we should replace ALL cars with busses, and then they could go super fast with all the other buses. Make 'em small, so it's maybe 20 people per bus. That's 20 cars off the road, right there.
When everyone is following at a reasonable distance (ie, there's a couple of car lengths between cars), if someone has to hit the brakes for some reason (sun in their eyes, car cuts them off, etc), then the car behind can slow instead of stopping, and it doesn't propagate. Notably, the person who triggered the wave doesn't even need to stop. If the person behind them is following close enough, just slowing down a little bit will cause the person behind to slow _more_, and the person behind them to stop.
Once everyone is stacked on top of each other, any interruption in the flow of traffic propogates backwards. That's why when you get to the "end" of the traffic congestion it looks like people stopped for "no reason". But you've just hit the front of a pressure wave. You'll probably hit another one in a little while if density doesn't ease up ahead of you.
The only way to eliminate stop and go traffic is to stop people from entering onto the freeway after it hits a certain density.
There are ceramic brakes that produce very little particulate matter by comparison to semi-metallic. The only downside is performance can degrade more in extreme driving conditions (sustained racing with heavy braking). For a daily driver, it's a quieter and cleaner material.
And this is just one the many nuisances produce by cars.
Electric cars do not massively reduce almost any of the pollution produced by cars.
We have to reduce the automobile fleet by at least 95% to solve all the nuisances produces by cars.
This is like the March of Dimes syndrome. We got rid of exhaust with electric cars, but the cars-are-bad activists continue to exist and need something to gripe about.
I always use the cruise control to decelerate and accelerate. Anyone else has that habit?
At most, I've felt it shift down (on an automatic, obviously) to use engine braking while it was trying to reduce speed going downhill.
Any other time, it's only slowed down by coasting.
EVs are like an inferior product being shoved down everyone's throat when consumer cars don't even account for the most emissions globally.
The first Li-Ion battery revolution has already happened, it's just not evenly distributed.
https://www.androidpolice.com/what-are-silicon-carbon-batter...
And that's before we get into stuff like solid state batteries.
10 years from now we'll probably have battery packs which are at least 20% lighter, available in some mid-range vehicles.
That's nothing compared to all the savings (tail pipes emissions, break dust, noise, ICE maintenance issues…). And we're just getting started with battery chemistries and renewables energy. This can only get better.
Which means 40% more road maintenance.
> And we're just getting started with battery chemistries and renewables energy. This can only get better.
Which implies it is better to delay switching until we have better batteries
Let's discard everything but road maintenance?
No thanks. https://ourworldindata.org/grapher/co2-mitigation-15c
not what I said. The points were:
1. its not all good.
2. if we buy cars with battery chemistries that will soon be replaced with better ones there is a good argument for delaying purchases. Not having to replace the cars again, for example.
Air quality tier list:
S-tier: African/American/Australasian countries that were never discovered by the West, and have no energy sources (hypothetical)
B-tier: Western countries and similar (e.g. Japan), and those who've had a resource that they've traded for Western advances (e.g. Asia/Middle East) that can afford nuclear and renewables
D-tier: Sub-Saharan African/South American countries that now have energy needs but are burning coal or diesel to meet them
I’m not sure how you get more tire wear but less brake dust.
Rusty rarely exercised drum brakes have a ton of failure modes that result in severely degraded or nonexistent performance that the average motorist probably wouldn't care about until they really need the brakes and they don't all work well enough.
The heat capacity of drums is pretty easily made noticeable, not "exceeded" to the point of substantially reduced capacity, but noticeable from the driver's seat in just a few good stops in high ambient temps (think like stop and go light to light in somewhere like DC or Miami) or one decent hill. Yeah you can polish the turd with fancy fins and materials and airflow, etc. but discs are just so much better per dollar and per pound.
Most of the problems discs have are NVH and rotor problems that are easily solved for intermittent/lesser use with the simple use of better alloys (Dexter even makes stainless for boat trailers, which are probably the ultimate example of extreme intermittent usage, so it's not like this is groundbreaking). Dominant slider pin designs these days are highly optimized for performance/NVH at the expense of longevity but there's an entire catalog of historical designs that one could easily conclude have better tradeoffs for less demanding usage.
But people already had this entire debate decades ago when disc brakes were first implemented. If you are racing or using a lot of braking power, discs are obviously better, they have better heat dissipation, they are quicker to repair and replace, more predictable for analog/dumb traction and stability control systems, and getting them rusty and dirty isn't a concern because you are racing and/or using the shit out of them. And most of the disadvantages became of little concern to consumers because when the consumer market moved towards automatic transmissions and smaller displacement engines people stopped engine braking constantly and were instead clearing their brakes off at literally every stop so dirty disc brakes stopped being a common concern. But the downsides still exist and is why disc brakes haven't taken over all applications.
Like yeah, drums have less heat capacity and worse cooling, but the entire point of regenerative braking is that you don't use them as much and so heat issues don't matter, only a small fraction of your braking force will use the physical brakes. Ideally in an EV your physical brakes are 100% a safety item, not a common usage item, and so reliability should be the top concern.
My ass. They might be "trouble free" in that you don't notice them not doing anything whereas a well rusted rotor will be very clearly cranky and/or felt in the brake pedal or steering wheel and perhaps the driver will elect to take it to the shop.
>Or in trailers brakes that are utilized far less often.
And which have a pretty strong reputation for always being in some degraded state or otherwise not working to full capacity.
>Ideally in an EV your physical brakes are 100% a safety item, not a common usage item, and so reliability should be the top concern
In which case a disk is far more likely to work, if poorly and loudly whereas a drum is much more likely to be completely out to lunch for some huge fraction of the cylinder's travel from a long ago seized adjuster or whatever.
Yeah, drum brakes "can" be made to work. I bet wagon style friction brakes "can" be made to work. But discs are just soooo much easier. Throw an 80s style stainless slider arrangement on it so pins aren't a concern and pony up for a galvanized or stainless rotor and it becomes a basically a "good for the life of the car" item if you don't go through the pads.
And those people who would lose money are the EV manufacturers. AFAIK in the US EV manufacturers are barely making money even with gov’t subsidies (baring Tesla). They can’t charge what would be necessary without subsidies because most people simply wouldn’t want or couldn’t afford such a product at that price point.
It makes me wonder about this from a policy perspective. China, more than any other country, has the power to dump products at a net loss to the country for the sake of a long term victory. That's tough to combat.
Yes I know the KIA is only faster during acceleration and theres more to cars than acceleration/top speed that ... but the commentary was too funny. It made ferrari look like a car from the past.
EVs as they are being pushed on us are made for cities. Outside of a dense urban area, EVs without a gas/diesel powered charger (aka hybrid) are much less useful, but I do not want to see charging stations everywhere either.
Kinetic recovery is great, but as there are orders of magnitude less braking required driving outside of cities, the recovered energy is also much less, and the brake dust generated is also much less. Also there are far fewer cars per mile of road (let alone size of the area) and any brake dust pollution is spread over a much wider area.
Many of the negative pollution issues associated with cars are due to excessive density in urban areas, the added amount of braking, the added idling, and the extra acceleration repeatedly required in a city with a stop light every block.
So as soon as you tap the brake pedal just a little, you start regenerating and see the amps flow back into the battery (I have a little display on my dashboard). Only when you press the pedal further, do you start engaging the friction brakes.
I have no statistics on brake pad differences because we didn't build enough cars/didn't cover enough mileage to measure, but it is obvious that you would cut down on brake pad usage.
Everything I know about EVs and the tech behind it I share on: youtube.com/@foxev-content
Another way of further reducing brake dust might be to have a higher regen setting that dumps excess power to a heat sink and cooling system, up to its limit before engaging the mechanical brake pads/discs.
In the first gen Nissan Leaf you can toggle between two levels of regeneration by toggling "B mode" which mimics automatic transmission car's behavior in "Hill mode" or when disabling "Overdrive". In the Leaf it just increases regeneration strength when you let off the accelerator. Similarly you can adjust the acceleration curve by disengaging "Eco mode".
Turning Eco mode off and Hill mode on makes the Leaf a lot of fun to drive on winding mountain roads. Unfortunately you only get like 15 minutes of drive time...
Exactly, they already do regen first, then mechanical braking, and just hide all the details.
I would like to see those details available so I can tune them (it'd be ok if they put safety limits on where they know the capabilities of the batteries, electronics, etc. far better than I ever could). Just a nice to have...
Series hybrids also have the ability to dump excess power just like you are suggesting as well. Instead of resistor banks (like trains) they often dump energy by using the generator to spin the engine… literally engine braking.
So the premise in the title of the article does not surprise me, but I thought that the primary pollution complaint about electric vehicles was tire pollution and not brake dust.
My EV is set on max regen mode though, and I sometimes drive without pressing the brakes, as there’s a paddle I can use to use regen for all my braking needs bar an emergency. It even has a name - single pedal driving.
I preferred downshifting VS braking, personally
I also use the built in "hilltop reserve" feature, which limits charging to 90%. This ensures that there is always regen resistance, and therefore a consistent experience.
The number that I've seen bandied about is ~20% greater tire wear.
Prompted by your comment I had a look at vehicle weights and two facts stood out
- ALL new cars are getting heavier EVERY YEAR because we keep adding more stuff (average car weight, and average SUV weight trend upwards from 2016 to 2023)
- The average electric car is heavier than a petrol equivalent but is lighter than an SUV
Weight certainly a problem, but the focus on EVs for weight is generally blown out of proportion.
https://www.thisismoney.co.uk/money/cars/article-13588773/Ne... https://www.sustainabilitybynumbers.com/p/weighty-issue-of-e...
But you do raise a good point at the holistic condition, and assessing a broader population with less than ideal configuration.
They are looking at lightweight EVs at lower speeds. But Americans drive heavier EVs at highway speeds. The rotors & pads are huge.
Perhaps other EV drivers can chime in but, if anything, I think I use my friction brakes less at highway speeds where, in general, you're not really supposed to do a lot of braking. I'd say, overall and regardless of speed, my friction brakes are really used only to bring the car to a complete stop or for emergency braking to avoid a potential accident.
Some people are very responsible with money - they have an emergency fund, contribute to their retirement fund, and don't carry a credit card balance.
Other people (who have a choice) spend to 0 every month, don't save, and have maxed out credit cards.
In the same way, some people drive very safely; they keep a responsible distance between them and the driver in front of them, and don't tend to speed much. I think this style of driving would naturally lead to what you say - less use of friction breaks in general, and especially at highway speeds.
And other people are constantly speeding, and tailgate the person in front of them when their path is blocked. For the people who drive this way, the greater acceleration of EVs just lets them drive that much more recklessly. Which ends up necessitating even more usage of friction brakes.
I still expect EVs to be a net improvement on brake dust. just not as massive as the study. maybe about 1/2 - 1/3 of the study's results
If you are getting lower MPG than the EPA rating, you are also burning up your brakes from heavy deceleration. Improve your MPG to 15% over EPA and your brakes will last a lot longer.
Also their studies were in European markets with tiny EVs and low speeds. Americans are favoring 7k-9k lb EVs (Hummer, Rivian), with massive brake rotors and PADs— at highway speeds 75mph+. A good driver of a 3k lb vehicle will produce less brake dust than a typical driver of a 9k EV.
Studies like this are helpful, but they are not comprehensive. Similar to the marketing that home LEDs would have 10-20 year longevity, yet in practice they burn out after a few years. The full supply and application chain has to align for the ideal results in practice.
Another factor is speed.
Of course there's little use in having this conversation since we all think ourselves above average drivers. I've had acquaintances reply "I don't even need a clutch I can shift so smooth!" (Do not attempt.)
There are _moments_ where I would like to exercise more control, like the long downhill example or maybe staying in a low gear in bad weather.
But, I'm still unconvinced that engine braking on a manual transmission in a consumer sedan for every stoplight is helpful. Cars weigh a lot, simply let off the gas a few seconds earlier.
When done properly , clutch wear is minimal. My clutch lasted > 150k miles and still going
100%.
People need to understand that the brake pedal is an evil device that converts your cash into brake dust and heat, so use it as little as possible.
Stop accelerating so much in stop-and-go traffic. Drop the "You have to tailgate or else people get in front of you" nonsense attitude. Release the gas sooner when approaching a red light. And for fuck's sake, stop hitting the brakes when you're only trying to shave off a couple mph, especially when going up hill.
I've gotten better-than-EPA mileage on every car I've owned, and I don't even drive slow. Always at or slightly above the speed limit. Economy is all about speed management, not absolute speed, until you're going 75+ mph.
I broke an engine mount from heavy acceleration (and hitting a huge pothole) . A lot of strain is put on the chassis from gassing and braking.
After a bit you learn how much you can slow down with it and (for me at least) it becomes a bit of a game to see if you can avoid using the mechanical brakes by choosing early enough to lift your foot.
As a result, the mechanical brakes get squeezed on every trip, but nearly all uses are during low speed maneuvering. If a light changes at the last moment or someone pulls out in front of me I will then have to make a substantial use of the mechanical brakes but that doesn't happen on every trip.
I never have to ride the brakes down a long hill, and it was really satisfying the one time I went down a hill long enough to see the battery state of charge increase by a percent or two.
What we do with that knowledge is another question, but right now my feeling is a lot of bad actors skew the picture to make themselves look good while regular people are left to breath the dust.
> The health effect is especially critical for urban disadvantaged groups, where exposure to partical matter has been shown to be related to increased asthma rates, cardiovascular disease, and other respiratory conditions.
Why would the health effect be more critical for disadvantaged groups than for other urban groups?The sentence, while poorly written, isn't saying that "health impacts don't matter for 'non-disadvantaged people'". A reading that is disingenuous.
Makes sense now. Thanks.
I think it would have radically improved air-quality around roads and highways
Every runner and cyclist would have greatly appreciated it
chasebank•1d ago
fossuser•1d ago
ab_testing•1d ago
justinholt•1d ago
bityard•1d ago
EVs eat tires when people drive them like they're on a race track, which is most of the time.
nostrademons•1d ago
If Teslas specifically are in the tire shop more, perhaps it's that Teslas ship with shitty tires. I've heard of a number of car makes that ship with really fragile OEM tires as a way to get you back into the shop for service.
derektank•1d ago
cheald•1d ago
nostrademons•1d ago
cheald•22h ago
xeonmc•23h ago
https://www.youtube.com/watch?v=O1kdxm5cKfA
cyberax•1d ago
rayiner•1d ago
BLKNSLVR•23h ago
Interested in the FUD level going on.
As an owner of a (2014 model) Nissan Leaf, which my wife and I both love, it does seem that Nissan somehow dropped the ball on electric given how good the Leaf still is (11 years later) as a suburban commuter vehicle and how it was a very early electric production car.
rayiner•13h ago
I get the criticism--why pay Tesla prices to fall 10-20% short of Tesla specs? But the fit and finish is a cut above the Model Ys we drove, the ride is very comfortable, and the electronic features are, while more primitive, more intuitive and predictable. We'll probably get the 2025 to replace our Subaru Forester (which we've been very unhappy with in terms of reliability). I hear the 2025 model squeezes another 30 miles or so out of the battery, which would enable us to make the trip to NYC on a single charge, which is the only complaint we have.
qwerty_clicks•1d ago
thefourthchime•1d ago
thebruce87m•20h ago
It’s easy to spot when people are just making stuff up. Why would he tell you lifespan in months rather than distance?