| 摘要 |
PURPOSE:To obtain an optimum characteristic in accordance with frequency, by providing a means for detecting a load acting upon a cylinder support means and for generating a control signal in accordance with the transfer function of a differentiating filter so as to regulate the flow rate and pressure of working liquid is regulated. CONSTITUTION:A control unit 60 for generating a control signal receives signals from sensors for detecting the internal pressures of cylinders 2FR and the like so that the signals are delivered to a control circuit 66 through a filter 64. Similarly, it receives a signal from a pressure sensor 65, and therefore, hydraulic oil is returned to a tank 32 when the pressure thereof exceeds a predetermined value. In this arrangement, the dynamic spring characteristic of a suspension device 1 may be changed in accordance with frequency by the transfer function of a differentiating filter in the control circuit 66. With this arrangement, it is possible to give a suspension characteristic preferably for every frequency. |
