4 ms·

> Fortunately, the owner who experienced this issue was able to stop the acceleration by pressing the brake, which cuts power to the drive motors. However, as s

> Fortunately, the owner who experienced this issue was able to stop the acceleration by pressing the brake, which cuts power to the drive motors. However, as soon as the driver lifted their foot off of the brake, they reported that the truck immediately accelerated at full throttle. Kind of scary considering the 6,800-pound truck can sprint from 0-60 mph in under 2.7 seconds. There's got to be a system/UX design thing somewhere to prevent this. It's extremely rare for someone to want to brake while keeping the foot fully pressed on the accelerator, and then want to accelerate fast moments later.

sebastianavina 3y ago
have you seen people burning tires? guess how do they do it
- deleted 3y ago
  [deleted]
sgarland 3y ago
Not in an EV, anyway. In ICEV (especially turbocharged), the scenario is at least plausible, since that’s how you preload the drivetrain, spool the turbo, etc. It’s not strictly for track, either – my wife’s Mazda CX-9 has a turbo inline-4 that is gutless until boost (which comes on blessedly low, to be fair). If you need to jump out into traffic from a side street or the like, it’s much safer to perform the above so there isn’t a huge delay between driver input and meaningful response.
pelagicAustral 3y ago
Seems like a must-have if your employer is Immortan Joe.
infecto 3y ago
Is that how some launch control systems work in automobiles? On the day-to-day I agree its probably not common but I also am not sure I would want a system that decides to not apply acceleration. Too many edge cases in the real world to try and determine what the user would want. Not bad UX but very bad hardware design/QC for having a pedal cover that is just attached with some clips
- user_7832 3y ago
  Isn't launch control starting from start though? This incident sounds like they were already driving.
  - infecto 3y ago
    Sure, but again the issue is not the behavior of the input systems. It would be near impossible to design a system as you describe. Overriding human behavior is especially difficult, especially a decision of when to allow accelerator input or not.
    - user_7832 3y ago
      Honestly I think other solutions would be possible if manufacturers cared enough. Easy solution: pressure plate that measures which part of the pedal is getting pushed. Floor mats/loose pedals press on the bottom, humans press at the top. Fancy but probably excellent when functioning solution: Use computer vision to detect foot position using camera(s) down there. Maybe IR lighting too. There's more possible ways but I think you get what I'm trying to say.
lukan 3y ago
"It's extremely rare for someone to want to brake while keeping the foot fully pressed on the accelerator, and then want to accelerate fast moments later. " It can happen in near accident situations. First slow down, then after seeing the reaction of the other vehicle, accelerate in a different direction. I wouldn't want to confirm a touchscreen in that situation.
- amenhotep 3y ago
  Not full accelerate, then switch to brake, then full accelerate again, I think that's fairly clearly within normal parameters of human control. What's being discussed here is full accelerate, then full brake while still fully engaging accelerator, holding both down even to the point of the car stopping, then releasing the brakes and fully accelerating again. I struggle to think of any situation where this, holding the two pedals down at once, doesn't represent either an error or such a total failure of human control that the car should stop anyway. If it was a manual you'd stall it, and that's a perfectly fine behaviour to emulate.
SkyPuncher 3y ago
This is exactly what you want to do if you’re launching your vehicle. Like for a 0-60 run. That being said, that should really only happen on an actual track.

sebastianavina 3y ago

have you seen people burning tires? guess how do they do it

deleted 3y ago
[deleted]

sgarland 3y ago

Not in an EV, anyway. In ICEV (especially turbocharged), the scenario is at least plausible, since that’s how you preload the drivetrain, spool the turbo, etc. It’s not strictly for track, either – my wife’s Mazda CX-9 has a turbo inline-4 that is gutless until boost (which comes on blessedly low, to be fair). If you need to jump out into traffic from a side street or the like, it’s much safer to perform the above so there isn’t a huge delay between driver input and meaningful response.

pelagicAustral 3y ago

Seems like a must-have if your employer is Immortan Joe.

infecto 3y ago

Is that how some launch control systems work in automobiles? On the day-to-day I agree its probably not common but I also am not sure I would want a system that decides to not apply acceleration. Too many edge cases in the real world to try and determine what the user would want. Not bad UX but very bad hardware design/QC for having a pedal cover that is just attached with some clips

user_7832 3y ago
Isn't launch control starting from start though? This incident sounds like they were already driving.
- infecto 3y ago
  Sure, but again the issue is not the behavior of the input systems. It would be near impossible to design a system as you describe. Overriding human behavior is especially difficult, especially a decision of when to allow accelerator input or not.
  - user_7832 3y ago
    Honestly I think other solutions would be possible if manufacturers cared enough. Easy solution: pressure plate that measures which part of the pedal is getting pushed. Floor mats/loose pedals press on the bottom, humans press at the top. Fancy but probably excellent when functioning solution: Use computer vision to detect foot position using camera(s) down there. Maybe IR lighting too. There's more possible ways but I think you get what I'm trying to say.

lukan 3y ago

"It's extremely rare for someone to want to brake while keeping the foot fully pressed on the accelerator, and then want to accelerate fast moments later. " It can happen in near accident situations. First slow down, then after seeing the reaction of the other vehicle, accelerate in a different direction. I wouldn't want to confirm a touchscreen in that situation.

amenhotep 3y ago
Not full accelerate, then switch to brake, then full accelerate again, I think that's fairly clearly within normal parameters of human control. What's being discussed here is full accelerate, then full brake while still fully engaging accelerator, holding both down even to the point of the car stopping, then releasing the brakes and fully accelerating again. I struggle to think of any situation where this, holding the two pedals down at once, doesn't represent either an error or such a total failure of human control that the car should stop anyway. If it was a manual you'd stall it, and that's a perfectly fine behaviour to emulate.

SkyPuncher 3y ago

This is exactly what you want to do if you’re launching your vehicle. Like for a 0-60 run. That being said, that should really only happen on an actual track.