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> you brake with the electric motors first This is not true. At least for Teslas, the brake pedal only controls the friction brakes (they are hydraulically cou

> you brake with the electric motors first This is not true. At least for Teslas, the brake pedal only controls the friction brakes (they are hydraulically coupled). Same with a Chevy bolt. Unsure on other EVs

josephcsible 4y ago
In Teslas, any time your foot is completely off the accelerator, you're getting maximum regenerative braking. If you then press the brake pedal too, you're getting maximum regenerative braking plus friction braking.
- potatochup 4y ago
  I think I misunderstood your use of "actual pedal" in the GP comment. You meant accelerator by that? I assumed brake pedal
  - josephcsible 4y ago
    My point was that unless you do something bizarre or go out of your way to make regeneration not happen (e.g., hit both pedals at once, or shift into neutral while braking), the friction brakes will never get used except for when full regen is already getting used.
- Tagbert 4y ago
  Teslas don’t use regen on the brake pedal. That is only using the friction brakes.
  - josephcsible 4y ago
    Right, but they use regen just by releasing the accelerator. So unless you're hitting both pedals at once, you will be regenerating every time you're braking.
    - sliken 4y ago
      If you use both pedals at once it will reduce acceleration and warn you.
    - Tagbert 4y ago
      Does the one-pedal regen continue to operate when you are pressing on the brake pedal?
      - josephcsible 4y ago
        Yes.
deleted 4y ago
[deleted]
Tagbert 4y ago
Yes, Tesla is an outlier in the EV business. They only have one-pedal driving with regen or fully friction braking with the brake pedal. That is not true of the Chevy Bolt. Almost every other EV (and hybrid) on the market does blended regen with the brake pedal. Regen is applied when you first press on the brake pedal. As long as the pressure is mild to moderate, regen is used. If you press hard (as in emergency braking) the friction brakes are engaged. When you get below about 10mph the friction brakes are also applied as regen is minimal at that speed. The result is that these cars will do regen whether you are using one pedal driving or not and their brakes will wear much less often. I’m not sure why Tesla doesn’t do blended regen. Early one the manufacturers didn’t have the algorithms tuned and you could feel the transitions but that has not been the case for several year. It seems that Tesla just never bothered. They seem to expect you to only use one-pedal driving and some people do. One think to watch for if you only use one-pedal driving, your friction brake pads can get rusty from disuse. Then when you do press on the brake pedal, the brakes may grab or may not decelerate as quickly as expected. Some people find that their brake pads are actually frozen from rust and don’t work at all. It is a good idea to once in a while use those friction brakes to scrub off the surface rust.
- sliken 4y ago
  Well regenerative braking is limited and even more limited when cool. So Tesla's trying to train you to use the brake pedal when you want stronger braking. Makes sense to me, last thing I want is to get half as much braking as I expected. So with regen I get variable braking, but I get a reward (more range and less brake wear) if I plan ahead enough to make it work. However if there is surprise or immediate need for more braking then the brake pedal is there. So it's pretty much the best of both worlds, once you get used to it.
  - gambiting 4y ago
    In a well designed system you have absolutely no idea whether the car is using the regenerative brake or proper brakes when you use the pedal - my Volvo XC60 uses regerative brakes first and you honestly can't tell when the transition happens. There is no "oh shit I need more braking" moment because the pedal operates in a very predictable linear fashion, like in any normal car. Same in my VW e-UP. The algorithms for this have been sorted out for a while now.

josephcsible 4y ago

In Teslas, any time your foot is completely off the accelerator, you're getting maximum regenerative braking. If you then press the brake pedal too, you're getting maximum regenerative braking plus friction braking.

potatochup 4y ago
I think I misunderstood your use of "actual pedal" in the GP comment. You meant accelerator by that? I assumed brake pedal
- josephcsible 4y ago
  My point was that unless you do something bizarre or go out of your way to make regeneration not happen (e.g., hit both pedals at once, or shift into neutral while braking), the friction brakes will never get used except for when full regen is already getting used.
Tagbert 4y ago
Teslas don’t use regen on the brake pedal. That is only using the friction brakes.
- josephcsible 4y ago
  Right, but they use regen just by releasing the accelerator. So unless you're hitting both pedals at once, you will be regenerating every time you're braking.
  - sliken 4y ago
    If you use both pedals at once it will reduce acceleration and warn you.
  - Tagbert 4y ago
    Does the one-pedal regen continue to operate when you are pressing on the brake pedal?
    - josephcsible 4y ago
      Yes.

deleted 4y ago

[deleted]

Tagbert 4y ago

Yes, Tesla is an outlier in the EV business. They only have one-pedal driving with regen or fully friction braking with the brake pedal. That is not true of the Chevy Bolt. Almost every other EV (and hybrid) on the market does blended regen with the brake pedal. Regen is applied when you first press on the brake pedal. As long as the pressure is mild to moderate, regen is used. If you press hard (as in emergency braking) the friction brakes are engaged. When you get below about 10mph the friction brakes are also applied as regen is minimal at that speed. The result is that these cars will do regen whether you are using one pedal driving or not and their brakes will wear much less often. I’m not sure why Tesla doesn’t do blended regen. Early one the manufacturers didn’t have the algorithms tuned and you could feel the transitions but that has not been the case for several year. It seems that Tesla just never bothered. They seem to expect you to only use one-pedal driving and some people do. One think to watch for if you only use one-pedal driving, your friction brake pads can get rusty from disuse. Then when you do press on the brake pedal, the brakes may grab or may not decelerate as quickly as expected. Some people find that their brake pads are actually frozen from rust and don’t work at all. It is a good idea to once in a while use those friction brakes to scrub off the surface rust.

sliken 4y ago
Well regenerative braking is limited and even more limited when cool. So Tesla's trying to train you to use the brake pedal when you want stronger braking. Makes sense to me, last thing I want is to get half as much braking as I expected. So with regen I get variable braking, but I get a reward (more range and less brake wear) if I plan ahead enough to make it work. However if there is surprise or immediate need for more braking then the brake pedal is there. So it's pretty much the best of both worlds, once you get used to it.
- gambiting 4y ago
  In a well designed system you have absolutely no idea whether the car is using the regenerative brake or proper brakes when you use the pedal - my Volvo XC60 uses regerative brakes first and you honestly can't tell when the transition happens. There is no "oh shit I need more braking" moment because the pedal operates in a very predictable linear fashion, like in any normal car. Same in my VW e-UP. The algorithms for this have been sorted out for a while now.