| 摘要 |
<p>A motor-driven type front and rear wheel steering apparatus comprises a steering sensor (21) to detect at least one between a steering torque and a steering angle, a motor-driven type power-assisted steering unit (7, 8, 22) to assist in steering the front wheels (5a, 5b) in response to a torque signal from the steering sensor (21), a motor-driven type rear wheel steering unit (11 - 15) for steering the rear wheels (19a, 19b) in response to at least one of a signal representing the steering torque and a signal representing the steering angle which are generated from the steering sensor (21), and a control unit (9) which receives signals from the steering sensor (21), a vehicle speed sensor (10), a motor revolution angle sensor (12) and a rear wheel steering angle sensor to control the motor-driven type power-assisted steering unit and the motor-driven type rear wheel steering unit, wherein the control unit actuates only the motor-driven type power-assisted steering unit (7, 8, 22) when the automobile stops or runs at a low speed, and actuates both the motor-driven type power-assisted steering unit and the motor-driven tpye rear wheel steering unit (11 - 15) when the automobile runs at an intermediate speed or at a high speed.</p> |
