Patent ID: 8251194

Claim:
A solenoid valve device, comprising: a solenoid valve having a hollow sleeve in which a first port group including an input port, an output port, and a drain port, and a second port group including a suction port and a discharge port are formed, a spool which is a shaft member to be inserted into the sleeve and capable of opening/closing the respective ports by sliding in an axial direction, a spring that urges the spool in the axial direction, and a solenoid section that generates a thrust with respect to the spool in a direction opposite to the spring, the solenoid valve being formed with a pressure control chamber formed between the sleeve and the spool to serve as a pressure control valve that adjusts the thrust generated in the solenoid section to control a pressure of a hydraulic fluid input into the input port through a discharge of the fluid from the drain port and outputs the fluid from the output port, and a pump chamber formed by being divided as a space isolated from the pressure control chamber between the sleeve and the spool to serve as a solenoid pump that sucks the hydraulic fluid via the suction port and discharges the fluid from the discharge port by repeatedly making the solenoid section generate the thrust and stop the generation thereof; a drive circuit that drives the solenoid section; a current sensor that detects a current applied to the solenoid section; and a control unit that controls, when the solenoid valve is served as the pressure control valve, the drive circuit by performing a feedback control based on the current detected by the current sensor so that a current in accordance with an output pressure command is applied to the solenoid section, and controls, when the solenoid valve is served as the solenoid pump, the drive circuit without performing the feedback control so that a pump current is applied to the solenoid section.