Patent ID: 7396024

Claim:
A hydraulic pressure control apparatus for a plurality of stabilizers provided in a vehicle for controlling hydraulic fluid in a hydraulic communication path hydraulically connecting a plurality of cylinders each operatively connected to each of the plurality of stabilizers, comprising: a spool valve provided in the hydraulic communication path, the spool valve including a housing, a spool movably accommodated in the housing, a first spool chamber defined by the housing and one end of the spool, a second spool chamber defined by the housing and the other end of the spool and hydraulically connected to an accumulator, and a biasing member provided in the second spool chamber for biasing the spool toward the first spool chamber, and the spool relatively moved in the housing selectively toward the first spool chamber or toward the second spool chamber to selectively open or close the hydraulic communication path; a first hydraulic communication passage hydraulically connecting the accumulator and the hydraulic communication path and having a cross sectional area smaller than that of the hydraulic communication path; a first solenoid valve provided in the first hydraulic communication passage for selectively opening or closing the first hydraulic communication passage; a second hydraulic communication passage hydraulically connecting the first spool chamber and the hydraulic communication path and having a cross sectional area smaller than that of the hydraulic communication path; a second solenoid valve provided in the second hydraulic communication passage for selectively opening or closing the second hydraulic communication passage; a check valve provided in the second hydraulic communication passage for bypassing the second solenoid valve from the first spool chamber to the hydraulic communication path as a forward direction; and a control device for controlling the first and second solenoid valves to open and close.