Patent attributes
A clutch device of an oil pump in a power steering system includes a pulley shaft coupled with a pulley connected with a crankshaft of an engine via a belt, a body shaft coupled with a rotor rotatably installed in a pump body and provided with a vein, clutch plates provided in the pulley shaft and the body shaft, and transmitting a rotation power of the pulley shaft to the body shaft or blocking the rotation power therebetween, an elastic member provided in the body shaft, a check valve installed on a supply port connecting an airtight space, a solenoid valve installed on a return port connecting the airtight space in the pump body with an input port through which oil is supplied to the pump body, and a controller to control the operation of the solenoid valve.
