some doesn't has any direct mechanical link between steering and wheels. Typical those cheap system use this kind of design
Steer by wire yo
You are so WRONG!!! I actually thought the same thing for many years. Until i saw an actual electric assisted power steering assembly!! It is actually a motor that is either added to an existing steering assembly, or motor build over steering assembly. When you turn, the motor assists according to speed. You can increase the torque/ speed of the motor to regulate the assist. Steer by wire actually means additional controls to the steering. NOT WIRELESS STEERING. If there was a WIRELESS steering assist, that might be possible. But a physical shaft that push and pulls the wheels to either side was never removed.
DID YOU KNOW the electrically assisted steering also acts like a balancing gimball? Its like those 3 axis camera gimballs that gives you anti shake images. NO? Which is why bump/ jump steer is almost eliminated in modern electrically assisted steering cars.
The only reason why an electrically assisted steering could fail is electrical failure in the motor/ wiring/ ECU or software. If you (i know cannot, but lets say the motor died) totally turn off the eletcric assist, your steering would be heavy to turn. It will not jam as the gears can be designed not to be aggressive that hold a steer position it in place.
Steering return to centre is affected by suspension geometry specially caster , nothing to do with power assistance or not and affected by speed
Same effect is seen on bicycle , you ride slowly the handle bars need constant correction, ride fast enough the handlebars maintain straight ahead and you can release your hands if your balance good enough
Same concept on a car , slow speed the caster effect is reduced , hence return to centre is not automatic
True. But when you drive power assisted and non power assisted, the steering return to center speed also differs. Which is why sometimes i expect the steering to come back to me at certain turns but it does not on power assisted ones. Steering fight back to me is the one that determines feel. Hydraulic steering offers less road damping than electric ones. Non assisted feels like the whole steering assembly wanna fall off. hahaha.
This post has been edited by netmatrix: Aug 1 2017, 10:52 AM
You realise that power steering was invented to eliminate steering kick back ?
And power steering doesn't react to wheel inputs , only steering inputs specifically to stop steering kick back .
This way the wheel remain straight forward when hitting a bump instead of jerking to the right or left
That is not feel , that mate is progress
No really the fight back is the one that determines how much angle you have input. When you have assist it remove some of the mental estimation that we are built with. We rewire ourselves to adapt to the assisted version. But to be fair i have driven non assisted version far more than assisted ones. First thing that comes to me when i drive assisted one is it REMOVED FEAR. In a way that is a good thing and bad thing. Steering kick back is only bad when you start to scream and cover your face when you hit an obstacle.....
Its bad for controlling the car properly and maintaining directional control
This movie explains a lot and also why i always say steering feel is bullshit journalism , power steering is meant to remove feedback from wheels
Yes i know. I quoted electric assist is actually like a camera gimball smoothing out unwanted vibrations and feedbacks in another (Ohhh yet another Axia related subject) thread.
AXIA spin again ! 
Jul 31 2017, 06:55 PM
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