Steering system for a motor vehicle
AssigneeDaimlerChrysler AG
InventorsThomas Kind, Reinhard Orthmann, Juergen Trost
Life of this patent
Estimating the term…
Abstract
A steering system for a motor vehicle, which allows steer-by-wire operation, a hand-torque actuator being connected in the steer-by-wire mode to a steering handle, e.g. a steering wheel, to simulate a steering resistance or a restoring torque. In order to be able to ensure adequate operating safety for the vehicle if the hand-torque actuator fails, even if the steering system is operated on a steer-by-wire basis, damping means are provided, which damp adjusting movements of the steering handle by the driver in the steer-by-wire mode if the hand-torque actuator fails.
Claims12
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.
Dependencies are inferred from the claim text.