7 ms·

Worrisome, but good that it got caught before anyone got into an accident. The issue shouldn't be present in all trucks, but better to recall all of them to be

by yreg 3y ago

Worrisome, but good that it got caught before anyone got into an accident. The issue shouldn't be present in all trucks, but better to recall all of them to be safe. BTW: What happens if you fully press both the acceleration and brake pedals? I would hope for the brakes to be more powerful and stop the car, is that the case?

zaroth 3y ago
Since the accelerator is drive by wire, pushing both pedals disables the accelerator, and produces a warning chime and alert message on the screen. The brakes do not have to be stronger, it’s handled in software. If the accelerator is pinned down, letting up on the brake will cause the car to start accelerating again. So you have to keep on the brake and then put the car in park. Pressing the accelerator while in park does nothing.
- techdmn 3y ago
  > pushing both pedals disables the accelerator Much to the frustration of those of us who occasionally engage in some left-foot braking. (Though TBH in my experience it's usually more effective in FWD cars.)
  - jandrese 3y ago
    What is the point of heel-toe or left foot braking if there is no gearbox to rev match?
    - techdmn 3y ago
      I like the left-foot jab jab jab to induce a slide while still on the power. I've read about other mixed input strategies, but that was the only one I was ever able to pull off to my satisfaction.
deleted 3y ago
[deleted]
randlet 3y ago
I don't know about the Cybertruck specifically, but yes, brakes are virtually always capable of providing more stopping force than the engine can oppose.
Someone1234 3y ago
> The issue shouldn't be present in all trucks, but better to recall all of them to be safe. There is a video floating around of this issue, and based on that I'd call it an issue in all shipped trucks. While only a couple had it loose from the factory, the fact the two plates are only press fitted and when it slides up there is a perfect nook for it to get stuck in is a huge problem. If I was a Cybertruck owner I'd inspect it at least every week and schedule the recall work ASAP.
- brandonagr2 3y ago
  They aren't only press fitted, they are glued together, but a change on assembly line lead to chance that some soap got on pedal and prevented the glue from bonding the two parts
  - yreg 3y ago
    Sounds like a screw would be better.
masklinn 3y ago
> What happens if you fully press both the acceleration and brake pedals? I would hope for the brakes to be more powerful and stop the car, is that the case? You get a “both pedals pressed” alert and the accelerator is ignored, so the brakes don’t even need to overcome the engines. The behaviour is logical at least since tesla added blended braking (though I’d assume it also did that before then). However as soon as you release the brakes the car starts accelerating as whatever the throttle is at again.
sp332 3y ago
NHTSA targets a 5th percentile person being able to stop the car with the engine at full throttle. https://www.autosafety.org/wp-content/uploads/2015/03/The-Brakes-Will-Not-Always-Overcome-the-Engine.pdf https://www.autosafety.org/wp-content/uploads/2015/03/The-Br...
- echoangle 3y ago
  Not related to your comment itself, but that’s a really bad paper/document. When analyzing the case “sudden full throttle when the car is stopped”, it is assumed that breaking only begins after 1.5s. Does a normal driver not keep the brake held while stopped at a traffic light. Also, he later assumes that data from a drag race can be compared to the case of sudden acceleration when at a stop because drag race drivers should floor the throttle, too. As far as I know, flooring is often not the fastest way to accelerate (just like fully braking compared to ABS), so the drag race data does not necessarily represent full throttle from a stop.

by yreg 3y ago

zaroth 3y ago

Since the accelerator is drive by wire, pushing both pedals disables the accelerator, and produces a warning chime and alert message on the screen. The brakes do not have to be stronger, it’s handled in software. If the accelerator is pinned down, letting up on the brake will cause the car to start accelerating again. So you have to keep on the brake and then put the car in park. Pressing the accelerator while in park does nothing.

techdmn 3y ago
> pushing both pedals disables the accelerator Much to the frustration of those of us who occasionally engage in some left-foot braking. (Though TBH in my experience it's usually more effective in FWD cars.)
- jandrese 3y ago
  What is the point of heel-toe or left foot braking if there is no gearbox to rev match?
  - techdmn 3y ago
    I like the left-foot jab jab jab to induce a slide while still on the power. I've read about other mixed input strategies, but that was the only one I was ever able to pull off to my satisfaction.

deleted 3y ago

[deleted]

randlet 3y ago

I don't know about the Cybertruck specifically, but yes, brakes are virtually always capable of providing more stopping force than the engine can oppose.

Someone1234 3y ago

> The issue shouldn't be present in all trucks, but better to recall all of them to be safe. There is a video floating around of this issue, and based on that I'd call it an issue in all shipped trucks. While only a couple had it loose from the factory, the fact the two plates are only press fitted and when it slides up there is a perfect nook for it to get stuck in is a huge problem. If I was a Cybertruck owner I'd inspect it at least every week and schedule the recall work ASAP.

brandonagr2 3y ago
They aren't only press fitted, they are glued together, but a change on assembly line lead to chance that some soap got on pedal and prevented the glue from bonding the two parts
- yreg 3y ago
  Sounds like a screw would be better.

masklinn 3y ago

> What happens if you fully press both the acceleration and brake pedals? I would hope for the brakes to be more powerful and stop the car, is that the case? You get a “both pedals pressed” alert and the accelerator is ignored, so the brakes don’t even need to overcome the engines. The behaviour is logical at least since tesla added blended braking (though I’d assume it also did that before then). However as soon as you release the brakes the car starts accelerating as whatever the throttle is at again.

sp332 3y ago

NHTSA targets a 5th percentile person being able to stop the car with the engine at full throttle. https://www.autosafety.org/wp-content/uploads/2015/03/The-Brakes-Will-Not-Always-Overcome-the-Engine.pdf https://www.autosafety.org/wp-content/uploads/2015/03/The-Br...

echoangle 3y ago
Not related to your comment itself, but that’s a really bad paper/document. When analyzing the case “sudden full throttle when the car is stopped”, it is assumed that breaking only begins after 1.5s. Does a normal driver not keep the brake held while stopped at a traffic light. Also, he later assumes that data from a drag race can be compared to the case of sudden acceleration when at a stop because drag race drivers should floor the throttle, too. As far as I know, flooring is often not the fastest way to accelerate (just like fully braking compared to ABS), so the drag race data does not necessarily represent full throttle from a stop.