Patent ID: 8191694

Claim:
A lock-up clutch hydraulic pressure supply apparatus comprising: an electromagnetic valve that outputs a hydraulic pressure increases as a current supplied to the electromagnetic valve increases; and a switch valve having a valve element that is moved, in response to the hydraulic pressure supplied from the electromagnetic valve, from a first position at which the supplied hydraulic pressure is sent from the switch valve to the lock-up clutch so as to establish one of an applied state and a released state of the lock-up clutch to a second position at which the supplied hydraulic pressure is sent from the switch valve to the lock-up clutch so as to establish an other of the applied state and the released state of the lock-up clutch, wherein an area of the switch valve on which the hydraulic pressure supplied from the electromagnetic valve acts when the valve element of the switch valve is at the second position is larger than the area of the switch valve on which the hydraulic pressure supplied from the electromagnetic valve acts when the valve element of the switch valve is at the first position.