The adaptive air suspension in the Audi SQ7 features an electromechanical active roll stabilization system. That’s a fancy way of saying they’ve put an electric motor inside their sway bar. Each sway bar (front and rear) has access to a 48V power supply, and is capable of delivering 1200 Nm of torque from a 1.5kW motor.
source/image: Engineering Explained
That’s in part thanks to a three-step planetary gear reduction of 200:1. The fascinating thing about this system is it allows for the vehicle to change it’s understeer/oversteer tendencies in real time.
By stiffening the front sway bar relative to the rear, this increases the amount of load transfer the outside front tire sees, increasing understeer.
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By stiffening the rear sway bar relative to the front, this increases oversteer. This can be balanced for ideal handling. The video describes how this all works!
