| 摘要 |
PURPOSE:To improve quickness in low speeds and response stability in medium and high speeds by modifying the distance between the center of gravity of vehicle and a position making the side slip angle of a vehicle body zero depending on vehicle speeds in a device wherein the rear wheel steering angle is controlled against front wheel steering angle based on vehicle speeds and steering angle. CONSTITUTION:When control constants operated by a formula I be K, T1 and T2, the steering angle theta of a handle and vehicle speeds V are detected by a steering angle sensor and a vehicle speed sensor respectively, the rear wheel steering angle deltar(S) is controlled against the front wheel steering angle deltaf(S) based on a formula II. In this case, when the distance between the center of gravity of a vehicle and a position making the side slip angle of a vehicle of a vehicle body zero is l3 (the direction toward rear wheels shall be positive), the distance l3 is modified depending on vehicle speeds so as to control the rear wheels. |
