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Electric cars produce less brake dust pollution than combustion-engine cars

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Re: Electric cars produce less brake dust pollution than combustion-engine cars

#361

Post by masklinn »

mschild wrote: post #298
pkolaczk wrote: post #274

Earlier quoted context omitted.

I confirm and that’s an unpleasant surprise. Already had to replace the rear rotors and pads on my Highlander… because of rust. They should add some “brake cleaning” mode to temporarily disable regenerative braking.

> They should add some “brake cleaning” mode Also known as breaking. You could just do that once in a while.

Modern EVs tend to do blended braking (at least by default) in which case pressing the brake pedal gently will likely just do more regen braking. It’s only when you request more than regen braking can provide that physical brakes engage.

Re: Electric cars produce less brake dust pollution than combustion-engine cars

#363

Post by throw0101d »

cperciva wrote: post #176
nine_k wrote: post #41

I suppose the same should apply to hybrid cars, which outnumber pure EVs significantly [1]. The effect comes from converting the kinetic energy back to the battery charge via generation instead of wasting it via friction, which is the whole point of hybrids. [1]: https://www.consumeraffairs.com/automotive/how-many-electric...

which is the whole point of hybrids 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.

> […] 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.

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.

Re: Electric cars produce less brake dust pollution than combustion-engine cars

#364

Post by masklinn »

pkolaczk wrote: post #274
fho wrote: post #184

Earlier quoted context omitted.

The rear brake rotors on my Yaris hybrid are basically always rusty because they get used so little. After some time you just know when to start braking so you only use regen instead of the brakes.

I confirm and that’s an unpleasant surprise. Already had to replace the rear rotors and pads on my Highlander… because of rust. They should add some “brake cleaning” mode to temporarily disable regenerative braking.

There’s been a few suggestions that drum brakes should make a come back, for EVs.

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.

Re: Electric cars produce less brake dust pollution than combustion-engine cars

#365

Post by londons_explore »

seb1204 wrote: post #357
nine_k wrote: post #41

I suppose the same should apply to hybrid cars, which outnumber pure EVs significantly [1]. The effect comes from converting the kinetic energy back to the battery charge via generation instead of wasting it via friction, which is the whole point of hybrids. [1]: https://www.consumeraffairs.com/automotive/how-many-electric...

Many hybrids are not driven to max regenerative breaking. You need to drive and look ahead to make good use of the regeneration. Short distance breaking is still fast and using the discs.

Hard braking is an insane power. Eg. A typical 4,400 lb car emergency stopping from 80 mph has a braking power of 940 horsepower.

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.

Re: Electric cars produce less brake dust pollution than combustion-engine cars

#366

Post by TreeInBuxton »

pjc50 wrote: post #359
spuz wrote: post #352

Earlier quoted context omitted.

Your source doesn't consider non-plug-in hybrids also known as HEVs because zapmap are a company that sell charging services. The number of HEVs in the UK is about twice the the number of PHEVs so the total number of hybrids is still higher than the total number of BEVs. In 2024, 6% of vehicles on the road were hybrid compared with 3.7% fully electric. https://www.smmt.co.uk/more-than-a-million-evs-on-uk-roads-a...

I wonder which vehicles that is - is that predominantly the non-pluggable Prius?

There is a wide variety, MHEV is quite popular here due to lack of home charging, as many people live in terraces, etc

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

Re: Electric cars produce less brake dust pollution than combustion-engine cars

#368

Post by throw0101d »

mschild wrote: post #298
pkolaczk wrote: post #274

Earlier quoted context omitted.

I confirm and that’s an unpleasant surprise. Already had to replace the rear rotors and pads on my Highlander… because of rust. They should add some “brake cleaning” mode to temporarily disable regenerative braking.

> They should add some “brake cleaning” mode Also known as breaking. You could just do that once in a while.

*braking

* https://www.dictionary.com/e/brake-vs-break/

The two words are:

* https://en.wikipedia.org/wiki/Homophone

Re: Electric cars produce less brake dust pollution than combustion-engine cars

#369

Post by andrepd »

lotsofpulp wrote: post #308
mort96 wrote: post #278

Earlier quoted context omitted.

And, you can make much lighter and lower range electric cars without all those heavy batteries, and boost the range with diesel when needed. Very attractive in principle. Most cars are not using their full range all the time, for a lot of people a 50 mile range car would be more than enough 98% of the time, but that remaining 2% means that people end up buying 200 mile range cars instead. But then, do you end up remo…

Smaller cars have always been available, but people have shown a preference for bigger cars where they can sit higher up, even though it costs them more.

Maybe they should be at least charged for the catastrophic externalities that that "preference" results in.

Re: Electric cars produce less brake dust pollution than combustion-engine cars

#370

Post by stavros »

apelapan wrote: post #356
stavros wrote: post #297

Earlier quoted context omitted.

Hmm, what do you hate about it? I have a BYD and I always leave it at "strong", as otherwise it's too little braking (same as an ICE).

There are two aspect I don't like: 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 co…

Hmm, I don't really understand what you mean. If I want to reduce speed far ahead, I just ease up on the throttle pedal a little, and the car slows down a little. If I ease up a lot, it slows down a lot. I'm not sure what you mean...
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