FOUR WHEEL STEERING DEVICE OF VEHICLE

摘要

PURPOSE: A four-wheel steering device of vehicle is provided to improve the manipulation of the vehicle and to prevent the collision with an obstacle when parking by freely changing the phase of a steering angle of a rear wheel in the low speed area of vehicle travelling speed. CONSTITUTION: The four-wheel steering device for improving safety by changing the phase of the steering angle of the rear wheel when parking or driving at a low speed includes:an electromotive motor(1) for steering the rear wheel, a steering angle sensor(2) for detecting the steering angle of a front wheel; a left side obstacle sensor(4L) for sensing the obstacle placed in the left side of the vehicle; a right side obstacle sensor(4R) for sensing the obstacle placed in the right side of the vehicle; a controller(10) for steering the rear wheel by generating a signal in the electromotive motor based on a certain control algorithm by receiving a signal from the sensors.