9 hours? Nobody had an extension cord?
Tesla breaks down mid-turn and causes more than nine hours of travel chaos
11–20 of 82 posts
Re: Tesla breaks down mid-turn and causes more than nine hours of travel chaos
#12Running out of fuel is something it’s obviously “easy” to do with other cars. But I’m surprised that the electronics have _no_ power redundancy, there isn’t a manual release for the parking break, and running out of power causes the parking break to fail-closed?
yeah its a problem that comes up regularly, fails and can’t be rolled away. probably need legislation because so many ev fanboys pretend this isnt a problem. (i am an ev fanboy)
Re: Tesla breaks down mid-turn and causes more than nine hours of travel chaos
#139 hours? Nobody had an extension cord?
Or a portable generator?
Re: Tesla breaks down mid-turn and causes more than nine hours of travel chaos
#14Running out of fuel is something it’s obviously “easy” to do with other cars. But I’m surprised that the electronics have _no_ power redundancy, there isn’t a manual release for the parking break, and running out of power causes the parking break to fail-closed?
There seems to be some discrepancy as the article mentions that it ran out of power, but the owner, Mr Grigg, 57, said that the vehicle had failed despite having shown that it had several miles of charge remaining.
And yes, I'm surprised that an important component doesn't have a manual override. Imagine if the vehicle blocked access to a hospital or a busy bridge or tunnel.
Re: Tesla breaks down mid-turn and causes more than nine hours of travel chaos
#15They have a separate 12V battery that I imagine runs things like the handbrake, steering lock etc. Just like any other modern car. Probably some electrical failure in the 12V system.
Re: Tesla breaks down mid-turn and causes more than nine hours of travel chaos
#16Running out of fuel is something it’s obviously “easy” to do with other cars. But I’m surprised that the electronics have _no_ power redundancy, there isn’t a manual release for the parking break, and running out of power causes the parking break to fail-closed?
indeed - I would have thought a separate battery to run the cabin and safety features would be a good idea. I would only have to be 1/100th the size of the motor batteries.
Re: Tesla breaks down mid-turn and causes more than nine hours of travel chaos
#17Earlier quoted context omitted.
From the fine article: > The handbrakes of electric cars, and some other modern cars, are controlled electronically, unlike those of traditional petrol and diesel cars, which are mechanical. This means that the handbrake often locks when the power fails and the car cannot be pushed or towed. This sounds like a major oversight by Tesla as there should be some override in case a vehicle breaks down in a dangerous posit…
My diesel and my wife's petrol card both have electronic handbrakes. I'm not sure what would happen if either has a battery failure.
Most electronic handbrakes just push out a cam against the rotor. Most designs have a way to back the cam out with a wrench or tool.
However sometimes access can be ridiculous I believe BMW's release requires you digging around in the rear seating area for a socket to put a allen-key like shaft into to ultimately back it out. Some vehicles you'd have to jack up a corner to ultimately back it out.
It can vary widely from manufacturer to manufacturer, so it's unlikely something a recovery service would know off-hand since in general a "stuck" parking brake (or automatic transmission parking pawl) is an edge case situation for them.
Re: Tesla breaks down mid-turn and causes more than nine hours of travel chaos
#18Cars break down all the time but at least they can be moved to the side of the road. Are Teslas not able to be moved once they run out of juice? They’re heavy and even with a few folks pushing from the back, is it able to disengage the parking brake?
From the fine article: > The handbrakes of electric cars, and some other modern cars, are controlled electronically, unlike those of traditional petrol and diesel cars, which are mechanical. This means that the handbrake often locks when the power fails and the car cannot be pushed or towed. This sounds like a major oversight by Tesla as there should be some override in case a vehicle breaks down in a dangerous posit…
That is an unhelpful quote. Yes, some cars have electronic parking brakes. It is quite common on new cars today. But they typically require being affirmatively commanded to change between their applied and unapplied states. Nothing about the general existence of electronic parking brakes explains why this particular vehicle would have one engaged mid-turn.
Re: Tesla breaks down mid-turn and causes more than nine hours of travel chaos
#19Running out of fuel is something it’s obviously “easy” to do with other cars. But I’m surprised that the electronics have _no_ power redundancy, there isn’t a manual release for the parking break, and running out of power causes the parking break to fail-closed?
Safety-wise it's better option.
Breaking vs just rolling without working brakes.
And I really do not like trend of making brakes drive-by-wire instead of mechanical just to (presumably) save few pennies...
Re: Tesla breaks down mid-turn and causes more than nine hours of travel chaos
#20Earlier quoted context omitted.
My diesel and my wife's petrol card both have electronic handbrakes. I'm not sure what would happen if either has a battery failure.
Most electronic handbrakes just push out a cam against the rotor. Most designs have a way to back the cam out with a wrench or tool. However sometimes access can be ridiculous I believe BMW's release requires you digging around in the rear seating area for a socket to put a allen-key like shaft into to ultimately back it out. Some vehicles you'd have to jack up a corner to ultimately back it out. It can vary widely f…
If the power failed on most vehicles with electronic parking brakes while you were driving, you wouldn’t have the parking brake applied. And it would remain that way. As there wouldn’t be any power to rotate the mechanism into the applied position.