Patent ID: 8083021

Claim:
A method for operating a steering system for a motor vehicle with at least one steerable wheel, a servo drive and a superimposed gear mechanism, comprising: initiating a steering movement by the driver of the vehicle to create a steering wheel angle (δ s ); creating a control signal (δ Md ) based upon useful functions (VSR, LAFN), each of said useful functions corresponding to a steering component by which the steering wheel angle (δ S ) is adjusted at the superimposed gear mechanism to achieve a desired wheel angle (δ Fm ) of the at least one steerable wheel; triggering the servo drive for initiating movement of the servo drive creating a motor angle (δ M ) by an amount indicated by the control signal (δ Md ), said control signal being generated based upon said useful functions (VSR, LAFN); superimposing said motor angle (δ M ) on the steering wheel angle (δ S ) by operation of the superimposed gear mechanism to create a pinion angle (δ G ) for producing the desired wheel angle (δ Fm ) of the at least one steerable wheel; and turning back the servo drive in a controlled manner by at least one said steering component to eliminate an inclined position of the at least one steerable wheel when at least one of said useful functions of the steering system, corresponding to at least one said steering component for turning back the servo drive, is disabled.