Patent ID: 9221489
Filing Date: 2015-12-29
Classification: B62D

Abstract:
1. A method for operating an electromechanical steering system for a motor vehicle with variable chassis height, the electromechanical steering system including a steering shaft having a steering wheel at an upper end of the steering shaft and a steering pinion at a lower end of the steering shaft, a toothed steering rack, which is configured to be driven by a servo motor through a re-circulating ball screw drive, wherein the steering pinion meshes with teeth of the toothed steering rack, and a control unit configured to receive input signals and to generate output signals for driving the servo motor, the output signals being representative of an assist torque to be provided by the steering system, the method including: receiving or generating, by the control unit, a chassis height signal indicative of a current chassis height of the vehicle, and limiting the assist torque, on the basis of the chassis height signal, to an upper limit, wherein the upper limit is decreased with an increase of a difference between the current chassis height and a mean chassis height.