| 摘要 |
PURPOSE:To maintain an adequate rear wheel steering amount and to improve the operation safety of the vehicle by using a fixed operation parameter not depending on the car speed as the operation parameter of the rear wheel steering control device when it is detected that the reliability of the car speed is reduced. CONSTITUTION:A car speed reliability detecting device 6 to detect that the reliability of the car speed detected by a car speed detecting device 4 is lowered, and an operation parameter converting device 7 to make a fixed operation parameter not depending on the car speed into an operation parameter in a rear wheel steering control device 1 instead of an operation parameter decided by an operation parameter deciding device 5 when it is detected that the reliability of the car speed is reduced by a detector 6, are provided. And when the reliability of the detected car speed is low, the steering is converted to a stable general control not dependent to the car speed, and the steering amount of the rear wheels determined depending on an inaccurate car speed is prevented. Consequently, the operation safety of the vehicle can be improved not by depending on the reliability of the detected car speed. |
