| 摘要 |
PURPOSE:To enhance the drive comfortability of a vehicle on a wavy surface road, by providing such an arrangement that the road surface is judged as a wavy road surface when the relative displacement between the spring load member and the nonspring load member exceeds a predetermined value and the relative speed therebetween is below a predetermined value, and then the suspension characteristic is made rigid. CONSTITUTION:A vehicle level sensor 30 detects the relative displacement X between the spring load member and the nonspring load member and the relative speed V therebetween,and delivers detection signals to a control circuit 32. CPU 36 judges the condition of the road surface in accordance with the relative displacement X and the relative speed V under the control of a program stored in a memory. That is, when the relative displacement X exceeds a predetermined value but the relative speed V is below a predetermined value, the road surface is judged as a wavy road surface, and a drive circuit 46 is energized to drive an actuator 28 to make the suspension characteristic harder. With this arrangement it is possible to enhance the drive comfortability of the vehicle even on a wavy road surface. |
