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It's a system that changes the ratio of the steering wheel rotation to the wheel angle dynamically while still mechanically linking the wheels to the steering w
by pandaman 3y ago
It's a system that changes the ratio of the steering wheel rotation to the wheel angle dynamically while still mechanically linking the wheels to the steering wheel. It does not have the same parameters as Lexus system but many other things differ between BMWs and Lexuses too.
- simondotau 3y agoI’ve been driving a BMW with the variable ratio steering rack for over 10 years. It’s great. But it’s only variable ratio, not a dynamic ratio. Don’t confuse the two. A variable ratio is just a regular rack and pinion setup, except the teeth on the rack are more narrowly spaced at the centre. It’s pre-defined, fixed and static. 30 degrees of steering input will always result in the same movement of the front wheels. It’s mechanically fixed. The Cybertruck is a truly dynamic steering ratio. 30 degrees of steering input will result in a different outcome depending on othe variables such as road speed.
- pandaman 3y agoActive Steering is dynamic. It's not in every BMW though, you can test if your car has it by turning the steering wheel when stopped: it should only require 2 turns between locks with AS.