TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

Creep Mode.. drifting backwards...a third option needed?

Discussion in 'Model X: Driving Dynamics' started by Calgary, Jul 25, 2016.

  1. Calgary

    Calgary Member

    Joined:
    May 11, 2016
    Messages:
    13
    Location:
    Calgary
    #1 Calgary, Jul 25, 2016
    Last edited: Jul 25, 2016
    I like to keep Creep Mode OFF, but the issue I have is that without creep mode, the car is in total free wheel mode (forward and backwards), and so once or twice I have found myself drifting backwards when the road has even the slightest of inclines on a normal "flat" road...

    It would be great if the car would restrict backward drift when not in creep mode. I don't want it to go forward with out the gas pedal, but I don't want it to go backwards without either being in reverse or or neutral.
     
  2. Saghost

    Saghost Active Member

    Joined:
    Oct 9, 2013
    Messages:
    3,017
    Location:
    Delaware
    If you press the brake hard after stopping you should get the hill hold mode, where it holds brake line pressure until you hit the accelerator. Does that not work with creep of?
     
    • Like x 3
    • Informative x 1
  3. Derek Kessler

    Derek Kessler Member

    Joined:
    Apr 15, 2016
    Messages:
    39
    Location:
    Cincinnati
    Hill hold does work with creep turned off. I use it every day.
     
  4. gfb107

    gfb107 Member

    Joined:
    Sep 3, 2015
    Messages:
    125
    Location:
    Cary, NC
    It works whether creep mode is enabled or disabled.
     
  5. Calgary

    Calgary Member

    Joined:
    May 11, 2016
    Messages:
    13
    Location:
    Calgary
    Thanks all, I had missed that feature entirely. I will give it a try.
     
  6. chipmunk

    chipmunk Member

    Joined:
    Mar 21, 2016
    Messages:
    150
    Location:
    Orange County, CA
    Just FYI, while hill hold works regardless of whether creep mode is active, there is one small difference. Without creep mode on, you do not have to push nearly as hard on the brake for it to activate.
     
  7. PacManMX

    PacManMX Member

    Joined:
    Jul 14, 2016
    Messages:
    53
    Location:
    Seattle
    Drives me nuts too! When I'm in drive I only want to move forward. Period. I NEVER want to roll backwards. It's really annoying when in traffic or a stoplight on a road with a slight incline. You think you've stopped and take your foot off the break a millisecond too early so instead of it going into "hold", it rolls backwards. In this situation, when the car shifts from forward movement to backward movement, when in drive, the car should go into hold!
     
  8. Calgary

    Calgary Member

    Joined:
    May 11, 2016
    Messages:
    13
    Location:
    Calgary
    After testing this...
    It seems to come down to, if your foot is actually on the brake when you come to a speed of Zero (not 1 or 2) , then Vehicle Hold is enabled and all is good. If you drift in that last km/hr or two, say if you are on a slight incline, then hold is not activated and you can drift backwards.
     
  9. tennis

    tennis Member

    Joined:
    May 6, 2016
    Messages:
    54
    Location:
    New England
    The hold is activated when the dash shows (H). If you have your foot very lightly on the brake (i.e. because the surface is level) then the hold won't activate unless you give the brake a firmer push. I love this feature as I'd rather keep my foot on the accelerator ready to go than on the brake.
     
  10. ptsagcy

    ptsagcy Member

    Joined:
    Nov 4, 2013
    Messages:
    443
    Location:
    NJ
    @Calgary - Even if you "drift in" a firm press of the brake pedal engages hill hold.
     
    • Like x 1
  11. gavine

    gavine Petrol Head turned EV Enthusiast

    Joined:
    Apr 1, 2014
    Messages:
    1,009
    Location:
    Southern New Jersey
    The BMW i3 does this. When the car is in "drive" it will not roll backwards and when the car is in reverse it will not roll forwards. While this is a nice feature, I still prefer the Tesla hill hold option.

    The i3 does NOT have creep as an option by the way. No creep at all.
     
  12. Norge

    Norge Member

    Joined:
    Jan 16, 2016
    Messages:
    34
    Location:
    Bethesda, MD
    Hill hold works, but it requires a deliberate action. Most ICE cars don't slide back when you stop on an incline, and Tesla should be likewise. This is really perilous and could be fixed by a software update, one would think.
     
    • Like x 1
  13. systemcrashed

    systemcrashed Please Reboot

    Joined:
    Apr 7, 2016
    Messages:
    798
    Location:
    USA
    Drifting back even when creep is enabled.
    Prior to v8.0 update, this never happened. Since updating, Model X has drifted back twice when releasing the brake on a very subtle incline. There may be some delay between when the brake release signals the drive motor. The electronic control differs from an automatic transmission in that drivetrain torque is not constant while in D and depressing the brake. In an EV the release of the brake pedal simultaneously engages the motor if creep mode is enabled to simulate the constant torque of an automatic tranny. The timing of the electric motor's torque, if delayed enough, will allow the MX to drift back before it creeps forward. I'm not sure if tesla has changed this timing in v8.0
    The use of Brake hold on any incline resolves this.
     
  14. jonman

    jonman Member

    Joined:
    May 22, 2016
    Messages:
    80
    Location:
    MD
    i don't creep around much but when i do it's in a Tesla Model X. ;)

    all kidding aside, i have never enabled creep and i almost always use hard hold. the only time i don't is when backing up into my garage. it is a decent grade and i take it slow since i only have 2" MAX on either side of me. if i let off the gas the X naturally rolls forward instead of holding still. it has been tricky finding that sweet spot to where i can hold the X in place and not move either direction.
     
    • Funny x 1
  15. systemcrashed

    systemcrashed Please Reboot

    Joined:
    Apr 7, 2016
    Messages:
    798
    Location:
    USA
    Today I tried to replicate the drift I experienced and I noticed that when letting go of the brake slowly the motor's torque is felt just as the brake calipers release from the rotors. Although, when I very quickly let off the brake there's almost a half-second pause before the motor begins the creep. This pause may be enough to allow the car to roll back a bit when on an incline. The problem is that some inclines are not that obvious.
     

Share This Page