MOTOR-DRIVEN POWER STEERING DEVICE FOR CAR WORKING ALSO AS AUTOMATIC STEERING DEVICE

摘要

PURPOSE:To have easy and safe garaging as well as parking in a row by continuing the automatic steering until the values from sensing become identical to the corresponding stored values in memory about the moving distance and steering angle, and actuating applicable motions only at braking with the car speed zero. CONSTITUTION:A motor 4 is controlled by a controller 3 on the basis of signals from a steering torque sensor 1 and a car speed sensor 2, and thereby power assist is given to a steering device 5. When a switch 9 is put on to set in the memory mode, the signals from a wheel rotational angle sensor 7 and a steering angle sensor 8 are stored in the memory device 3a of the controller 3 at certain time intervals. When another switch 10 is put on to set in the automatic steering mode, the control is performed so that the values from the sensors 7, 8 become identical to their corresponding stored values in memory. When the switches 9, 10 are put on, these motions shall be started only when a brake switch 11 to sense the braking condition is on.