PURPOSE: To prevent the supply of unnecessary oil to each hydraulic control device without adverse effect on the operation of plural hydraulic control devices and suppress the useless workload of a pump so as to save energy.
CONSTITUTION: A hydraulic control system is provided with a hydraulic pump 21 for discharging oil in a reservoir 30, a hydraulic active suspension AS (first hydraulic control device) and a power steering PS (second hydraulic control device) put in operation receiving operating oil, a first flow control valve 22 interposed in an operating oil feed passage R1 from the hydraulic pump 21 to the first hydraulic control device AS so as to feed operating oil to the first hydraulic control device AS side and to feed residual operating oil to the second hydraulic control device PS, and a second flow control valve 60 interposed in an operating oil feed passage R2 from the first flow control valve 22 to the second hydraulic control device PS so as to feed operating oil to the second hydraulic control device PS and to return residual operating oil to the reservoir 30.
MORITA TAKAO
HARAYOSHI MITSUHIKO
