Patent ID: 8910768

Claim:
A clutch control apparatus for a vehicle, comprising: a normally-closed clutch disposed between a driving power source and driving wheels, the clutch being held in engagement by an elastic force applied to the clutch by an elastic member; a hydraulic cylinder serving as a hydraulic actuator of the clutch, the hydraulic cylinder disengaging the clutch by a hydraulic force overcoming the elastic force of the elastic member; a piston slidably disposed in a piston housing of the hydraulic cylinder, the piston having one end to which the elastic force of the elastic member is applied and the other end to which a hydraulic pressure in a piston chamber is applied; a seal member disposed on the piston, the seal member enhancing sealability between the piston and a housing slide surface of the piston housing in accordance with an increase in the hydraulic pressure in the piston chamber; and a pressure holding controller, wherein upon engagement of the clutch, the pressure holding controller is programmed to: if an engine speed rotation is equal to or greater than a threshold speed, apply additional hydraulic pressure to increase a sealing pressure between the seal member and the housing slide surface of the piston housing while maintaining an engagement condition of the clutch, wherein the threshold speed is a predetermined engine rotation speed at which vibration causes oil leakage from the piston chamber.