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That was my question too . . . align with what? I'm having a hard time getting my head around this. Unless something is severely bent or broken, issues of toe and camber would seem to be meaningless.
If the rear wheel is trying to push the vehicle right or left while going straight the result will be:
Poor handling, the vehicle will try to turn the direction the rear wheel is guiding it.
This means the driver must keep pressure on the steering-wheel in the opposite direction to go straight.
High tire wear. The wheels will act as erasers against the road.
It’s kind of like driving in a curve all the time.
All of this causes higher than normal fuel consumption.
It will also cause driver fatigue from trying to compensate all the time.
I don’t know how the stability control will affect all of this?
On the chassis production line they will ensure the rear cross member is (welded) at ninety degrees to the centreline of the full length of the car. Simple enough to do, especially as this will be done by robots welding components held on a jig.
From the photo supplied, it appears that the swing arm pivots from bolted on lugs located on the rear face of that rear cross member. If the rear swing arm allows the wheel to point off centre, they can very easily put shims between the cross member and the lugs, to bring it straight.
There's nothing new or radical about this technology, it's all been done before.