| 摘要 |
<P>PROBLEM TO BE SOLVED: To shorten time required for vehicle height adjustment in controlling vehicle height to increase. <P>SOLUTION: A pressure accumulation control valve 90 is made in an open state and a pump 81 to made to work in starting vehicle height adjustment. Working fluid is supplied to a suspension cylinder 10 from both of the pump 81 and an accumulator 86 for pressure accumulation. In this state, the pressure accumulation control valve 90 is changed over to be in a closed state when hydraulic pressure source hydraulic pressure changes to increasing tendency from decreasing tendency. Consequently, working fluid of the accumulator 86 for pressure accumulation is effectively used. The working fluid of the pump 81 is never supplied to the accumulator 86 for pressure accumulation, and consequently, by that amount increased a flow rate of the working liquid to be supplied to the suspension cylinder is 10, and the time required for vehicle height adjustment is shortened. <P>COPYRIGHT: (C)2007,JPO&INPIT |
