View Poll Results: Do you want creep or no-creep?

Voters
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  • No creep - the car doesn't move if the accelerator isn't pressed

    44 60.27%
  • Creep - the car rolls forwards if the accelerator isn't pressed

    29 39.73%
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Thread: Automatic creep makes it impossible to come to a smooth stop

  1. #171
    Quote Originally Posted by vfx View Post
    As stated upthread #1 the "problem with creep" is that it fights with the brake. This makes the jerky stops. So I would say no, it does not shut off when the brake is depressed.
    It definitely shuts off on my car. Yours may be different. Here's what happens: You brake and slow to 1-2 mph when it transitions from regen to creep. You keep applying brakes but more lightly in hopes of coming to a smooth stop. Meanwhile creep is still on so the brakes are applied more than they need to be if you had no creep. Then suddenly just before final stop, creep shuts off and you come to a jerky stop because your brakes are still applied hard enough to overcome creep, but creep is now off. If you keep your foot on the brake while stopped, creep will stay off. Cinergi described it in post 28 and you can observe the amps drop when fully stopped and creep is off. If they kept creep on a second longer you could stop smoother, but still not perfect.

    One solution to the jerky stop would be to transition the creep off a little slower so you could adjust brake pressure accordingly and stop smoothly. Not sure why they don't do that. There may be a minimum amount of power they have to send the motor due to a minimum duty cycle of the PWM electronics, preventing a smoother shut-down of power. Maybe they tried other methods of shutting down creep and it created other problems... So many times I wish I could interview the engineers who worked on this or that.

  2. #172
    ERIC VFX vfx's Avatar
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    So creep should be on for a second more or shut off a second earlier.


    The world loves to be deceived.


  3. #173
    Want ME one'a them squeeze horns!!

  4. #174
    Roadster 919, S 2006 Doug_G's Avatar
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    There's a hill near my house, where if I let off the brake the car just sits there. It consumes more power when my foot is off the brake, because the creep is holding it stationary. When I put my foot back down again the power drops back.

    Incidentally, the Model S seemed very smooth to me. Maybe they've done it a bit better.
    Roadster #919, Model S #2006
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