PURPOSE: To improve stability of a vehicle attitude by accurately controlling supply and discharge of working fluid from an accumulator through performing the control according to the differential pressure which is obtained from the pressure near the respective cylinders of the front and rear wheels and the internal pressure of the cylinders.
CONSTITUTION: Supply and discharge of working fluid is controlled by inputting the outputs from a system oil pressure gauge 42, cylinder pressure gauges 58 provided for each hydraulic cylinder 4, acceleration sensors 76 provided for respective wheels 12FR to 12RL and a car level sensor 78. In this case, a control unit 74 calculates the difference of the respective detected oil pressure between cylinder oil pressure gauges 58 and a system oil pressure gauge 42. Then, a supply and discharge control valve connected to respective high pressure pipings 26F and 26R is controlled by opening and closing the valve according to the calculated differential pressure. By this constitution, assembling of a differential pressure gauge into a flow control valve is unnecessary, and operation troubles due to dust clogging or the like can be prevented.
MORITA TOSHIKI
HAMADA KENJI
