Patent ID: 6854558

Claim:
An overlay steering system for a motor vehicle comprising: a mechanical steering apparatus for the transfer of a steering torsional moment with a predetermined transfer ratio to at least one steered wheel, an overlay actuator between the steering apparatus and the at least one steered wheel for overlay of the steering torsional moment, an overlay torsional moment in relation to a wheel torsional moment, a steering angle sensor connected to the steering apparatus for generating a steering angle signal corresponding to an angle of the steering apparatus, a wheel angle sensor connected to at least one steered wheel for generating a wheel angle signal that corresponds to an angle of the at least one steered wheel, a comparison device for comparing the steering angle signal and the wheel angle signal and for the generation of a comparison signal based on the steering angle and wheel angle, and an electromechanical converter for generating the overlay torsional moment, wherein the comparison signal indicates the presence of a deviation from the predetermined relation between the steering angle and wheel angle of the at least one steered wheel, resulting in a reduction of the deviation.