3 ms·

I'm no fancy automotive engineer but it seems like there's no reason the brake shouldn't directly break the circuit supplying power to the wheels.

by Kye 2y ago

sn0wf1re 2y ago
It's a legal requirement for motorized bicycles in BC (Canada), crazy that it isn't a requirement for automobiles.
- ulfw 2y ago
  There seem to be barely any legal requirements for Teslas in the US. The Cybertruck as is wouldn't be legal in the EU (and hence is not sold). How the lack of indicator stalks is legal is beyond me, as is the utter lack of buttons or the lack of speed indication in a driver's line of sight. The behaviour of using a screen with submenus to setup things while you're driving is madness if you think about it. We're not allowed to use our touch screen phones while driving but are allowed to use a touch screen bolted-on touch screen.
  - buffington 2y ago
    I’m currently renting a new Ford F-150 ICE truck and all of its UI is controlled through the enormous touch screen. There are physical buttons too, but they’re just remote inputs to the central UI. It also has a video display behind the steering wheel, where half the display is dominated by a menu, and gauges are displayed on either side of the menu. You can barely see the speedometer. I own a Tesla Model 3, and have ranted about how awful its touchscreen only control is bad for ages, but the Ford is significantly worse. Just today, the truck’s UI bugged out in such a way that half the exterior lights were blinking, while a period bell sound would blast every few seconds. A message on the screen complained that the car “needed to be running to…” with the rest cut off by a nondescript grey square.
  - me_me_me 2y ago
    I dont remember who was it, but a guy on yt tried to find pedestrian crash test for cybertruck, finding out that US has no such requirement at all.
rainbowzootsuit 2y ago
With regeneration you do have a desire to have power coming in from the wheels so a hard disconnect isn't desirable in all circumstances. I know, by observation, on my Prius that "panic stop" brake pressure disconnects the hybrid system due to all the noise that the contactors make when this happens, vs. lighter braking within the regeneration limits. Braking and power never ever fight one another though. I've tried "power braking" the Prius, like you can with a normal automatic transmission car to load the engine, and it just doesn't do anything at all. This article about the physically stuck pedals says that "Thankfully the truck cuts acceleration when you press the brake pedal..." but this seems to show otherwise. https://jalopnik.com/tesla-cybertruck-slippery-pedal-recall-caused-by-soap-1851423229 https://jalopnik.com/tesla-cybertruck-slippery-pedal-recall-...
somerandomqaguy 2y ago
Burns outs and drifting for the most part, assuming we're talking less then legal on public roads reasons. On a manual ICE vehicle it makes some sense to since you need to hold some brake while raising engine RPM for until the clutch engages. Not really sure what reason there would be on an electric vehicle to command the main motors to accelerate while brakes are applied.

I'm no fancy automotive engineer but it seems like there's no reason the brake shouldn't directly break the circuit supplying power to the wheels.

by Kye 2y ago

I'm no fancy automotive engineer but it seems like there's no reason the brake shouldn't directly break the circuit supplying power to the wheels.

sn0wf1re 2y ago

It's a legal requirement for motorized bicycles in BC (Canada), crazy that it isn't a requirement for automobiles.

ulfw 2y ago
There seem to be barely any legal requirements for Teslas in the US. The Cybertruck as is wouldn't be legal in the EU (and hence is not sold). How the lack of indicator stalks is legal is beyond me, as is the utter lack of buttons or the lack of speed indication in a driver's line of sight. The behaviour of using a screen with submenus to setup things while you're driving is madness if you think about it. We're not allowed to use our touch screen phones while driving but are allowed to use a touch screen bolted-on touch screen.
- buffington 2y ago
  I’m currently renting a new Ford F-150 ICE truck and all of its UI is controlled through the enormous touch screen. There are physical buttons too, but they’re just remote inputs to the central UI. It also has a video display behind the steering wheel, where half the display is dominated by a menu, and gauges are displayed on either side of the menu. You can barely see the speedometer. I own a Tesla Model 3, and have ranted about how awful its touchscreen only control is bad for ages, but the Ford is significantly worse. Just today, the truck’s UI bugged out in such a way that half the exterior lights were blinking, while a period bell sound would blast every few seconds. A message on the screen complained that the car “needed to be running to…” with the rest cut off by a nondescript grey square.
- me_me_me 2y ago
  I dont remember who was it, but a guy on yt tried to find pedestrian crash test for cybertruck, finding out that US has no such requirement at all.

rainbowzootsuit 2y ago

With regeneration you do have a desire to have power coming in from the wheels so a hard disconnect isn't desirable in all circumstances. I know, by observation, on my Prius that "panic stop" brake pressure disconnects the hybrid system due to all the noise that the contactors make when this happens, vs. lighter braking within the regeneration limits. Braking and power never ever fight one another though. I've tried "power braking" the Prius, like you can with a normal automatic transmission car to load the engine, and it just doesn't do anything at all. This article about the physically stuck pedals says that "Thankfully the truck cuts acceleration when you press the brake pedal..." but this seems to show otherwise. https://jalopnik.com/tesla-cybertruck-slippery-pedal-recall-caused-by-soap-1851423229 https://jalopnik.com/tesla-cybertruck-slippery-pedal-recall-...

somerandomqaguy 2y ago

Burns outs and drifting for the most part, assuming we're talking less then legal on public roads reasons. On a manual ICE vehicle it makes some sense to since you need to hold some brake while raising engine RPM for until the clutch engages. Not really sure what reason there would be on an electric vehicle to command the main motors to accelerate while brakes are applied.