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Inspection station in my state made comment to me that EVs are failing inspection for rusted brake components because of their heavy use of regen. Add to cost

by beezle 3y ago

Inspection station in my state made comment to me that EVs are failing inspection for rusted brake components because of their heavy use of regen. Add to cost of ownership.

Terr_ 3y ago
> Inspection station in my state made comment to me that EVs are failing inspection for rusted brake components because of their heavy use of regen. Are you suggesting some metal brake components have unusual rust because of disuse, where they aren't being used regularly enough for friction to "clean" their surfaces? Otherwise I don't see how regenerative breaking could cause rust, since the braking force is supplied by electrical fields.
- vimwizard 3y ago
  its pretty obvious he's saying its because the main brakes dont get used because regenerative breaking is enough to stop the car.
- rypskar 3y ago
  >>Are you suggesting some metal brake components have unusual rust because of disuse Yes, the brake disks, especially if you drive some place where they salt the roads during the winter. I had to change the rear disks on my hybrid after two years because they started to fall apart from rust, now I have learned to do some heavy braking at the end of trips to clean and dry the disks
eichin 3y ago
My 2021 EV simply favors mechanical braking over regen for a short period at the start of each trip, specifically to avoid this. (Seems a trivial software feature once you have hybrid braking at all...)
fy20 3y ago
I own a 2010 Prius and I've had to replace the brake pads more often than a regular car because of this, around every two years or 20k miles. I've had to replace the brake rotors twice over 80k miles, as the pads rusted and then wore it down unevenly. Below 5mph the brakes are used, but it doesn't seem to be enough. Compared to my ICE car they always look a lot worse, and after parked for a day when it's damp have surface rust. As another comment says, it seems like a software change could fix it by using the physical brakes more. I believe the issue is they get wet, and then don't get hot enough to dry out before parking.

by beezle 3y ago

Inspection station in my state made comment to me that EVs are failing inspection for rusted brake components because of their heavy use of regen. Add to cost of ownership.

Terr_ 3y ago

> Inspection station in my state made comment to me that EVs are failing inspection for rusted brake components because of their heavy use of regen. Are you suggesting some metal brake components have unusual rust because of disuse, where they aren't being used regularly enough for friction to "clean" their surfaces? Otherwise I don't see how regenerative breaking could cause rust, since the braking force is supplied by electrical fields.

vimwizard 3y ago
its pretty obvious he's saying its because the main brakes dont get used because regenerative breaking is enough to stop the car.
rypskar 3y ago
>>Are you suggesting some metal brake components have unusual rust because of disuse Yes, the brake disks, especially if you drive some place where they salt the roads during the winter. I had to change the rear disks on my hybrid after two years because they started to fall apart from rust, now I have learned to do some heavy braking at the end of trips to clean and dry the disks

eichin 3y ago

My 2021 EV simply favors mechanical braking over regen for a short period at the start of each trip, specifically to avoid this. (Seems a trivial software feature once you have hybrid braking at all...)

fy20 3y ago

I own a 2010 Prius and I've had to replace the brake pads more often than a regular car because of this, around every two years or 20k miles. I've had to replace the brake rotors twice over 80k miles, as the pads rusted and then wore it down unevenly. Below 5mph the brakes are used, but it doesn't seem to be enough. Compared to my ICE car they always look a lot worse, and after parked for a day when it's damp have surface rust. As another comment says, it seems like a software change could fix it by using the physical brakes more. I believe the issue is they get wet, and then don't get hot enough to dry out before parking.