STEERING CONTROLLING DEVICE FOR VEHICLE WITH FOUR-WHEELED STEERING MECHANISM

摘要

PROBLEM TO BE SOLVED: To provide a steering controlling device for a four-wheeled steering vehicle in which a rear wheel steering control is corrected in such a way that the vehicle can be moved sufficiently in a lateral direction of the vehicle when a driver wants to move it substantially in the lateral direction in the case of an emergency escape under a condition of in phase steering between the front and rear wheels.;SOLUTION: A four-wheel steering controlling device for a vehicle is characterized in that the same comprises a rear wheel steering controlling unit for use in controlling a rear wheel steering angle in such a way that the rear wheels are steered in respect to the front wheels under the same phase or opposite phase in response to some driving conditions of the vehicle, and a desired moving distance determining unit for detecting a state in which the vehicle should be moved in its lateral direction and for determining a desired moving distance in a lateral direction, and when the state in which the vehicle should be moved in the lateral direction is detected, the rear wheels are steered in the opposite phase in respect to the front wheels and the steering for the rear wheels under the same phase is delayed for a period determined in response to the desired moving distance.;COPYRIGHT: (C)2010,JPO&INPIT