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I disagree that Tesla would have to design their own braking system from the ground up. The friction brakes remain the same, it is just a question of when they get actuated. That is a function of the controller software that typically comes from Bosch who pioneered ABS systems. So my guess is that the manufacturers like Fisker who use regen for initial braking provide additional requirements/specifications to their provider of the braking system software, as opposed to having to do everything themselves.
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Model S - FAQ
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I'd be a little pissed if regen was on the brakes and love it as is. It is much nicer to be able to slow a bit without moving your foot over or flashing your brake lights at people.
The regen doesn't peak when you push the brake because of physics.
someone please correct me if I'm wrong
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Does The Fisker have an AC induction motor like the S? or are there some magnets in it?
2 motors on the Fisker? maybe that is the difference.
Until someone has an answer, I think it is the physics of the motor fields (someone educate us please? where are the ME/EE's)
Last edited by Zextraterrestrial; 2013-01-28 at 10:28 AM.
And we need to stop with 'Tesla should make this user selectable' on everything. What if I wanted the brake pedal to work the as the accelerator, and the accelerator to work as the brakes? In reality people HATE making all of these choices. I know we all want the car to work the way we want it but give it some time.
If there must be regen on the brake pedal there should be a defined point one could easily detect where mechanical braking begins. But my opinion is that the current Tesla system is much, much better as you always know which type of braking you do.
I often have no regen at all now in the Leaf, because of the cold battery. This has not caused any problems at all, I see this as a non-issue. I quickly detect the amount of regen available and adjust the driving automatically without thinking of it.
If regen could be made exceptionally strong (like with multiple motors on the model X, or even one motor on each wheel) then it might make more sense to have regen integrated more into the brake pedal (and have the brake lights go on, etc. to warn people behind you of your sudden deceleration.)
I think there are a lot of Model S owners who fit in that category
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