Patent ID: 6505700
Filing Date: 2003-01-14
Classification: B62D

Abstract:
A rear wheel steering device for use in a vehicle, comprising:two electric motors serving as drive sources for steering rear wheels of the vehicle; a rear wheel steering control device for controlling the two electric motors such that the two electric motors are driven when the two electric motors are both judged to be normal on the basis of motor condition signals indicative of operating conditions of the two electric motors; and a vehicle speed sensor for detecting a vehicle speed, and wherein, when one of the electric motors is in an abnormal state while the other one of the electric motors is in a normal state, the rear wheel steering control device is designed to control steering of the rear wheels using the electric motor in the normal state only when the vehicle speed detected by the vehicle speed sensor exceeds a given speed so that the resulting steering torque is small enough to enable steering of the rear wheels at a desired angle by only the electric motor in the normal state.