| 摘要 |
A first piston (3) and a second piston (4) coupled to a piston rod (10) are fitted in a cylinder (2), and an intermediate chamber (2C) is formed between the first and second pistons. A compression-side check valve (13) and an extension-side check valve (16) are provided at the first piston and the second piston. An extension-side main valve (18) and a compression-side main valve (23) are disposed in the intermediate chamber. A downstream side of a damping force adjusting valve is connected to the intermediate chamber. Inner pressures of an extension-side backpressure chamber (19) and a compression-side backpressure chamber (24) are adjusted by the damping force adjusting valve, whereby valve opening of the extension-side and compression-side main valves is controlled. Hydraulic fluid of the downstream side of the damping force adjusting valve is first sent into the intermediate chamber, and then is sent to a cylinder upper chamber (2A) or a cylinder lower chamber (2B). Due to this arrangement, it is possible to prevent a sudden drastic change in a hydraulic fluid pressure and thereby to generate a stable damping force. |
