Patent ID: 8899397

Claim:
A clutch control system of a clutch apparatus for a vehicle, the clutch apparatus being a normally-closed type and including a clutch portion selectively connecting and disconnecting an input shaft that is rotatably connected to an engine and an output shaft that is rotatably connected to an electric motor, a compression spring biasing a piston member in a direction in which the clutch portion is connected, a pressurized chamber causing the piston member to move in a direction opposite from a biasing direction of the compression spring to disconnect the clutch portion in a state to be supplied with a hydraulic fluid including a predetermined pressure, and a canceller chamber generating a fluid pressure for cancelling a centrifugal fluid pressure that is generated at the hydraulic fluid remaining at the pressurized chamber by being supplied with a hydraulic fluid in a state where the clutch portion is connected, the clutch control system comprising: an electric oil pump supplying the hydraulic fluid to the pressurized chamber, the canceller chamber, and the clutch portion; a regulator valve being switchable between a first mode in which a fluid pressure of the hydraulic fluid supplied from a first output port to the pressurized chamber is regulated to a first predetermined fluid pressure and a second mode in which the fluid pressure of the hydraulic fluid supplied from a second output port to the canceller chamber is regulated to a second predetermined fluid pressure, the regulator valve discharging a portion of the hydraulic fluid at the first predetermined fluid pressure in the first mode or at the second predetermined fluid pressure in the second mode as a drain lubricant to be supplied to the clutch portion; a switching valve connected between the first output port and the pressurized chamber and being switchable between a supply mode in which the hydraulic fluid regulated to the first predetermined fluid pressure is supplied to the pressurized chamber and a discharge mode in which the pressurized chamber is connected to a reservoir; and a control valve connected to the electric oil pump, the regulator valve, the switching valve, and the canceller chamber, the control valve controlling the regulator valve to be switched between the first mode and the second mode and controlling the switching valve to be switched between the supply mode and the discharge mode.