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 and becoming a Supporting Member. For more info: Support TMC

First unnecessary massive tantrum (emergency brake) from M3

Discussion in 'The UK and Ireland' started by elecTED, Dec 4, 2019.

  1. elecTED

    elecTED Member

    Joined:
    Jun 21, 2019
    Messages:
    324
    Location:
    Bristol, UK
    I guess it had to happen sooner or later.

    I have had a fair few phantom brakes of varying degrees of strength and quite a fair few unnecessary shrieking collision warnings but first time I’ve had an unnecessary emergency brake applied by car.

    Was very slowly approaching a gormless white (actually silver) van man who had his door open restricting the passage for vehicles to pass. I was about a couple of meters away from the car door almost coming to a halt when the car threw a massive wobbly and applied the emergency brakes with some force. The white van man gave me a dirty look as he closed his door and the M3 tantrum gave me a little fright too.

    Much room for improvement with all this fancy auto collision detection/warning/avoidance stuff.
     
    • Like x 2
  2. ewoodrick

    ewoodrick Well-Known Member

    Joined:
    Apr 13, 2018
    Messages:
    5,285
    Location:
    Buford, GA
    I'm guessing that wasn't the emergency breaking, but the new one pedal driving function.

    Did the alarms go off?
     
  3. JCremonini

    JCremonini Member

    Joined:
    Sep 11, 2019
    Messages:
    285
    Location:
    Bucks
    One pedal driving is to do with regenerative braking which uses the motor to slow the car down, when the accelerator is lifted, rather than apply the brakes. It won’t be that.
     
  4. ewoodrick

    ewoodrick Well-Known Member

    Joined:
    Apr 13, 2018
    Messages:
    5,285
    Location:
    Buford, GA
    And when you are right at the speed of stopping, the car applies the parking brake. When going very slow, the car prematurely applies the brake and can jerk the car a little.
     
  5. culverwood

    culverwood Member

    Joined:
    Oct 13, 2016
    Messages:
    216
    Location:
    Herts
    Phantom braking has annoyed me dozens of times but the other day it saved me from a certain accident.
     
  6. elecTED

    elecTED Member

    Joined:
    Jun 21, 2019
    Messages:
    324
    Location:
    Bristol, UK
    This was defo was an emergency brake as the car was brought to a violent halt. I think there was a warning shriek. One pedal slowdown is much gentler and gradual. Phantom breaking generally slows the car down (rather than bringing to a halt) with varying degrees of force and not really experienced the phantom at really low speeds.
     
  7. Alex987854

    Alex987854 Member

    Joined:
    Aug 30, 2019
    Messages:
    134
    Location:
    UK
    Any details? Or even dashcam footage?
     
  8. culverwood

    culverwood Member

    Joined:
    Oct 13, 2016
    Messages:
    216
    Location:
    Herts
    No dash cam but it was a slow speed incident and was the first time it had really slammed on the brakes as the car in front of me stopped rapidly while I was distracted.
     
  9. elecTED

    elecTED Member

    Joined:
    Jun 21, 2019
    Messages:
    324
    Location:
    Bristol, UK
    If it saved you from an accident then it’s not phantom braking - it’s collision avoidance (using automatic braking).

    By its nature the phantom (braking) strikes in mysterious circumstance, one which real humans find hard to explain.
     
  10. Electric Dream

    Electric Dream Pilots the Millennium Milkfloat

    Joined:
    Jul 21, 2016
    Messages:
    1,452
    Location:
    UK
    It's AEB. I've had it happen once when there wasn't going to be a collision. It can be a bit over-cautious at times.
     
  11. Yev000

    Yev000 Active Member

    Joined:
    May 3, 2019
    Messages:
    1,041
    Location:
    Knaphill
    Hed it emergency brake twice for me. Both times when I tried to regen to hold and it deemed I would not stop in time before hitting the car in front. Both times I would have stopped by using the brakes a bit gentler.

    One time it didn't brake but gave alarms when giving way and ducking in a gap in parked cars and not stopping.

    Really not sure how much improvement can be had without a lot more image processing and computing within the second the situation arises.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC