Live data from Hacker News

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

modernengineeringmarvels.com

151–160 of 783 posts

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

#151
post #4

An an EV owner, I can testify that the tyre wear more than makes up for the reduction in brake dust. I’ve had to change tyres every 10K miles.

> An an EV owner, I can testify that the tyre wear more than makes up for the reduction in brake dust

How could you possibly measure that just from your personal experience?

Sounds more like a wild guess that is in contradiction with actual studies.

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

#152

Earlier quoted context omitted.

And manual transmission cars kinda, though the energy is still wasted of course

Depends on how you drive. I never engine braked on my manual. Brakes are easy to replace. Clutches are not.

engine braking does not have any effect on the clutch, other than while downshifting, which if you're blipping/rev-matching has practically no effect

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

#153
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...

And manual transmission cars kinda, though the energy is still wasted of course

Surprisingly you can get nearly same effect in automatics. I put around 60k miles on my first automatic (after120k+ on my first two cars, manual transmissions) and when i got my brakes checked at 63k they noted my brakes were still "brand new". I do gamify reading traffic to try and brake as little as possible (to help pass time etc), but was still surprised how far this takes you given i do plenty of stop and go traffic driving. This was a v6 sedan so lighter than an suv / truck. I expected it to not work in automatics but it does to at least some extent. I swapped for an EV before taking it the usual distance and curious if anyones pushed further and how far.

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

#154

Earlier quoted context omitted.

And manual transmission cars kinda, though the energy is still wasted of course

Depends on how you drive. I never engine braked on my manual. Brakes are easy to replace. Clutches are not.

You don't engine brake with the clutch, you engine brake by downshifting and using the higher engine RPM in lower gears to brake the car via wasted compression.

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

#155
post #88

Earlier quoted context omitted.

To some extent, but not really. Effectiveness of regenerative braking depends on having an extremely large battery that can sink enough current to stop the car. An EV can do that, hybrids at best help the brakes out some. You just can't charge the battery fast enough doing anything but a very slow rolling stop. My model Y can effect a very reasonable stop in traffic without touching the brake pedal except to hold the…

I test drove an EV and the regenerative braking was difficult to get used to. You have to constantly ride the gas pedal. I would buy an EV if it weren't for this feature.

I don't think this comment should be down-voted since it is indeed a real point of difference and it is worth discussing.

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.

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

#156
post #131

Earlier quoted context omitted.

Huh? What do you imagine is the tradeoff between regenerative braking and tire life? Are you suggesting that stopping the car with conventional iron brakes is somehow easier on the tires?

the level of regenerative braking directly impacts your accelerator pedal behavior. 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 wil…

That's a whole lot of assumptions based on what?

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.

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

#157
post #88

Earlier quoted context omitted.

To some extent, but not really. Effectiveness of regenerative braking depends on having an extremely large battery that can sink enough current to stop the car. An EV can do that, hybrids at best help the brakes out some. You just can't charge the battery fast enough doing anything but a very slow rolling stop. My model Y can effect a very reasonable stop in traffic without touching the brake pedal except to hold the…

I test drove an EV and the regenerative braking was difficult to get used to. You have to constantly ride the gas pedal. I would buy an EV if it weren't for this feature.

To be constructive, took me a little over a week to get used to. Also i test drove four, and absolutely hated 2 of them. One felt very similar to my ICE car (VW ID4). Eventually settled on ioniq and after a week, it quickly became my favorite driving car ever (which coming from sporty manual transmissions, is not at all what i expected or why i bought it).

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).

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

#158

Earlier quoted context omitted.

Everytime I fill my truck up, I’m at the gas station thinking “man, I wish I could just hang out here for two hours!!”

More like 20 minutes, but ok, not everyone likes that.

what happens when there's more people that need 20 minutes? it takes me less than five to pull up, fill up, and go. when the gas station is packed, i might have to wait 4-5 minutes for my turn.

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.

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

#159

Ban the stop and go hell of rush hour. Cars rolling at freeway speed without stopping pollute way less than drivers stuck behind idiots who can't just go forward down the road at the speed limit. The human suffering and ecological impact reduced if only there would be a focus on enforcing speed minimums...

Even if everyone drove optimally, every road is going to reach a capacity where its physically impossible to maintain a certain speed. It's similar to network congestion. Mandating that everyone drive faster won't solve anything.

It would reduce the duration of rush hour... once the least skilled drivers were improved or removed from the pool. I do agree it wouldn't solve a complete lack of capacity, civic planning, transportation infrastructure. Including lack of busses that travel frequently enough and where people want to go.
Post reply on HN