| 摘要 |
PURPOSE:To prevent car height from its rapid decrease when a car stops, by providing a check valve, which allows fluid to flow passing in the output direction of a hydraulic pressure supply device, in the primary side of a pressure control valve and a gate valve, which operates when a supply pressure low decreases, in the return side of the pressure control valve. CONSTITUTION:While an engine 2 is in operation, a pressure of oil in an output side pressure oil pipe 5 rises to the preset value of a relief valve 8 by an oil hydraulic pump 4, being input to a pilot port of a pilot control type check valve 18. While the pressure of oil is supplied through a check means 9 and through a pressure control valve 11, and an active type suspension device functions. And even if the engine 2 stops low decreasing the pressure of oil in a hydraulic pressure supply device 1, the pressure of oil in a hydraulic pressure circuit, reaching a hydraulic cylinder 14 and the pilot control type check valve 18 from the check valve 9, is left as held by actuating the check valves 9, 18. Accordingly, car height can be prevented from rapidly low decreasing. |
