Remix.run Logo
teleforce 2 days ago

>drastically removed brake dust

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.

Dylan16807 2 days ago | parent | next [-]

My hypothesis is that in normal driving the EV with 30% extra weight will be using its brakes 90% less, making it beat the ICE version by a lot.

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?

sjducb 2 days ago | parent | prev | next [-]

My EV doesn’t use the brakes in normal driving. It can pull ~ 0.3G of regen before the physical brakes engage.

It will regeneratively brake all the way to a stop.

The brake disks are there for emergencies and spirited driving.

doikor 2 days ago | parent | prev | next [-]

EVs don’t really use the brakes during normal driving being mainly used for emergency braking.

You could achieve the same with engine braking with ICE but most don’t bother.

potato3732842 2 days ago | parent | prev | next [-]

I think buyer demographics are gonna play hugely into it. Some makes and models are highly popular among the drivers who are on the low side of the bell curve and basically never hit the brake when not stopping because they're almost never coming upon slower traffic. Some makes and models are highly popular on the other side of the peak of the bell curve where the drivers are always hitting the brake way more than the median or average. An ICE Tacoma may very well use way less brake than a EV Altima because the venn-diagram of people who drive like a bat out of hell and the people who buy Tacomas is approximately two circles.

masklinn 2 days ago | parent | prev | next [-]

> that makes the brake dust residue comparable to ICE if not worst based on the approximately 30% extra vehicle weight for the battery.

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.

eptcyka 2 days ago | parent | prev | next [-]

Yea, but the EV need not use the disc brakes to stoppe.

p_j_w 2 days ago | parent | prev [-]

Your hypothesis has already been tested multiple times. It has always failed.