| 摘要 |
PURPOSE:To restrain the rapid increasing of yaw rate by gradually increasing the ratio of the turn steering angle of rear wheels against the turn steering angle of front wheels to the same phase side in association with the increasing of the turn steering angle of the front wheels. CONSTITUTION:A signal from a steering angle sensor 26 which detects the turn steering angle of front wheels and a signal from a vehicle speed sensor 27 are inputted into the controller 25 of the turn steering mechanism 7 of rear wheels. And the controller 25 controls motors 14, 24 so as to cause the turn steering angle of the rear wheels to become an aiming turn steering angle in accordance with the given characteristic of turn steering ratio of the front and rear wheels. At this time, the turn steering ratio of the front and rear wheels is set to be a reverse phase at a low speed, and is set to be the same phase at a high speed, and is set to gradually increase to the same phase side in association with the increasing of the turn steering angle of the front wheels at each vehicle speed, irrespective of the high speed and the low speed. |
