| 摘要 |
PURPOSE:To enhance the response at cornering without impairing the running stability in straight running by setting the reference value for the rear wheel steering angle when the front wheel steering angle is zero, to a certain point on the toe-out side. CONSTITUTION:For the front wheel steering angle thetaH, No.1, No.2 specific value theta1, theta2 are selected in accordance with the car speed sensed by a car speed sensor S1. The operating amount of a steering wheel 6, i.e., the front wheel steering angle thetaH, is sensed by a steering angle sensor S4. The reference value for the rear wheel steering angle when the front wheel steering angle thetaH is 0, i.e., the initial toe, is set to a certain point slightly on the toe-out side. When the steering angle thetaH is smaller than the No.1 specific value theta1, a drive means E shall remain out of operation while the revolution is continued with the toe- out condition held as it is, to provide a high revolving characteristic. Further, when the steering angle thetaH exceeds the No.1 specific value theta1, the drive means E is actuated to control the rear wheels into the toe-in direction, and the neg. toe-in amount is approached to zero, that shall be attained when the No.2 specific value theta2 is reached. When this No.2 specific value theta2 is exceeded, the pos. toe-in amount is increased. |
