Rear wheel steering device for a vehicle.

摘要

A rear wheel steering device for a vehicle has a steering control mechanism which steers rear wheels of the vehicle on the following formula: TG theta R = -KF . theta F + K THETA . V . psi /<.> where TG theta R : target steering angle of rear wheels theta F : steering angle of front wheels V : vehicle speed psi /<.> : yaw rate KF, KR : coefficients determined by the properties of vehicle To achieve slip angle beta = 0, the device further includes a vehicle condition detecting mechanism which detects various conditions of the vehicle, and a changing mechanism being connected with the steering control mechanism and the vehicle condition detecting mechanism for changing at least one of the coefficients KF, KR based on the conditions of the vehicle