Patent ID: 8444529

Claim:
A hydraulic control apparatus for a vehicle equipped with an automatic transmission, the vehicle having a function of idling stop of an engine, the automatic transmission including a hydraulic circuit connected to an oil pump which is driven by the engine, the hydraulic control apparatus comprising: a cut valve disposed in the hydraulic circuit; a hydraulic storage device comprising a piston, the hydraulic storage device being connected to the hydraulic circuit through the cut valve; a stroke amount detecting means for detecting an amount of a stroke of the piston in the hydraulic storage device; and a control means for discharging a hydraulic pressure from the hydraulic storage device to the hydraulic circuit so as to compensate a lack of a hydraulic pressure from the oil pump upon restarting the engine from the idling stop, wherein the control means is configured to open the cut valve upon restarting the engine and, after opening the cut valve, close the cut valve in a case where a change in the detected amount of a stroke of the piston is reversed from such a direction as to discharge the hydraulic pressure from the hydraulic storage device to such a direction as to supply the hydraulic pressure to the hydraulic storage device.