Patent ID: 8403787

Claim:
A hydraulic control system of a power train for a hybrid vehicle, comprising: a line pressure and lubrication pressure generating unit that generates predetermined line pressure and lubrication pressure for lubrication, using hydraulic pressure supplied from an oil pump; a first reducing valve that generates first reducing pressure by decreasing the line pressure; a second reducing valve that generates second reducing pressure by decreasing the line pressure; a first clutch control unit that receives the line pressure, the first reducing pressure, and the second reducing pressure and controls a first clutch; a second clutch control unit that receives the line pressure, the first reducing pressure, and the second reducing pressure and controls a second clutch; a first brake control unit that receives the line pressure, the first reducing pressure, and the second reducing pressure and controls a first brake; a second brake control unit that receives the line pressure, the first reducing pressure, and the second reducing pressure and controls a second brake; and a manual valve MV that receives the line pressure, and supplies the line pressure to the first brake control unit, the second brake control unit, and the first clutch control unit in a D-stage state, and supplies the line pressure to the second brake-control unit in the R-stage state; wherein the manual valve has a D-stage port supplying the line pressure to the first brake control unit, the second brake control unit, and the first clutch control unit, an R-stage port supplying the line pressure to the second brake control unit, and a D-R check valve selectively supplying hydraulic pressure supplied from the D-state port and the R-stage port of the manual valve to the first clutch control unit and the second brake control unit.