| 摘要 |
PURPOSE:To stabilize the switching characteristics and to improve the responsiveness in a suspension system capable of variable damping force and spring characteristics by switching the damping force and spring characteristics of the suspension system based on the reference rate of steering input relative to the vehicle speed and the detected rate of steering input. CONSTITUTION:Steering angle 2, vehicle speed 3 and other inputs are inputted to a CPU16 via an input circuit 15. The CPU computes the average shift of the pulse frequency based on the latest N pulses in the vehicle pulse signal 3 in accordance with the predetermined program. Next, based on the information from the steering sensor 2, the change in the pulse edge and the sequence of the change are checked to determine the presence or non-presence of the change in the turning direction. If it is a positive turning, one cycle of the pulse is measured and the aggregate of the rate of steering input is computed. When it is greater than the reference value, an actuator 6 and a pneumatic spring 10 are set ''hard'', and is set ''soft'' when it is smaller. If turning in the negative direction, the ''soft'' setting is selected. In this manner, the switching characteristics are stabilized, and the responsiveness can be improved. |
