Patent ID: 6712175
Filing Date: 2004-03-30
Classification: B62D

Abstract:
Steering system for a motor vehicle, for providing steer-by-wire made of operation, said system comprising:a hand-torque actuator connected, in the steer-by-wire mode, to a steering handle for simulating a steering resistance or a restoring torque; and damping means which damp adjusting movements of the steering handle by a driver in the steer-by-wire mode only when the hand-torque actuator fails, wherein the hand-torque actuator includes an electric motor, which is connected to the steering handle whereby adjusting movements of the steering handle are associated with relative rotation between a rotor and a stator of the electric motor, in that the damping means have a circuit arrangement that switches windings of the electric motor in such a way that voltages induced by relative rotation between the rotor and the stator produce damping torques that counteract the relative rotation.