Patent ID: 8342997

Claim:
A hydraulic control device for an automatic transmission by which oil is supplied to and discharged from a starter having a hydraulic power transmission interposed between a driving source and an automatic transmission mechanism and a clutch capable of locking up the hydraulic power transmission, oil is fed out to an oil cooler to cool the oil concerned and oil is supplied into the automatic transmission mechanism to lubricate the automatic transmission mechanism, the device comprising: a lockup switching valve that is switched on a lockup state and a non-lockup state of the clutch, the lockup switching valve having a first input pressure and a second input pressure input thereto, wherein under the lockup state the lockup switching valve is switched to a first position at which the first input pressure is supplied to the starter and the second input pressure is supplied through the oil cooler to the automatic transmission mechanism, and under the non-lockup state the lockup switching valve is switched to a second position at which the first input pressure is discharged through the starter and the oil cooler to an oil pan and also the second input pressure is supplied to the automatic transmission mechanism.