| 摘要 |
PURPOSE:To reduce the error ratio and improve followability by moving rear wheels by little by means of a rear wheel steering device when the front wheel steering speed is low at a high car speed and moving them faster when the front wheel steering speed in high at a low car speed. CONSTITUTION:A steering device 2 steering front wheels 1 and a rear wheel steering device 4 steering rear wheels 3 are provided, and the rear wheel steering device 4 is driven by a pulse motor 5. The steering angle of the steering handle 6 of the steering device 2 is detected by a steering angle sensor 7, and a control means fed with at least the signal of this steering angle sensor 7 feeds a control signal in response to the front wheel steering angle to the pulse motor 5. A step angle setting means outputs a signal increasing the step angle of the pulse motor when the car speed is low and relatively decreasing the step angle of the pulse motor 5 when the car speed is high to the pulse motor 5 via the control means. |
