If Cybertruck power lost while driving, will the steer by wire system fail?

[jjban]

If Cybertruck power lost while driving, will the steer by wire system fail?

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[mark555055c]

Negative, there is a 48v battery(or two) that will provide enough power for vehicle control while you come to a stop.

 

[Outdoors]

Negative, there is a 48v battery(or two) that will provide enough power for vehicle control while you come to a stop.

I am sure the system checks those batteries all the time to make sure they would be ready.

 

[electricAK]

A few weeks ago, my power steering went out on my Honda while my wife was driving. While she probably *could* have still turned the wheel, it was hard enough for her that she could not steer at all. Major safety concern. Turned out to be a blown belt, basically guaranteed to happen eventually.

I'd much rather have steer by wire which is not designed to fail (like belts are), and has redundancy built in if it does fail.

 

[HaulingAss]

If Cybertruck power lost while driving, will the steer by wire system fail?

It's really no different from asking if an Airbus loses power will the pilot lose control of the control surfaces. The answer is no, due to built-in redundancies. Sure, there is always a tiny chance that multiple failures could happen at the same instant. But probably about as likely as an undetected metal flaw in the steering column causing the loss of steering in a car with a purely mechanical steering system. It's just so unlikely that there are better things to worry about. Like paying attention while driving.

 

[Woodrick]

If Cybertruck power lost while driving, will the steer by wire system fail?

How do you expect it to lose power? It's not as if the gas engine stops running.

 

[CyberGus]

How do you expect it to lose power? It's not as if the gas engine stops running.

1. Loose connector
2. Pyro fuse
3. Faulty circuitry
4. Racoons

The list goes on and on

 

[mongo]

If Cybertruck power lost while driving, will the steer by wire system fail?

Nope
Steering is controlled by both the left and right front control units.
Each is fed by both the 48V battery and the Power Conversion System (PCS) which is fed by the pack.

So to lose steering requires loss of both front modules or both the 48V battery and PCS.

The vehicle goes into limp mode on a single failure, so encountering a sudden dual failure should be an extremely rare event.

 

[mongo]

I'd much rather have steer by wire which is not designed to fail (like belts are), and has redundancy built in if it does fail.

Belts are designed to be checked and replaced before failure. They typically don't spontaneously break. Typical steering does have human powered backup for redundancy.
Dealing with old project cars, I do appreciate the ability to steer even if there is not a running engine.

A really bad setup was hydroboost where a pump failure would lose power steering and power brakes simultaneously. Astro vans had an issue where turning the steering wheel to the limit and pushing the brake could snap the pump shaft...

 

[Woodrick]

1. Loose connector
2. Pyro fuse
3. Faulty circuitry
4. Racoons

The list goes on and on

And different problems have different reasons and different outcomes.

I think that it was a fair question, since different scenarios would have different outcomes.

Or do you think that there is only one answer?

And I don't remember you being the OP.

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