Patent ID: 7946389

Claim:
An oil supply system for a vehicle, comprising: a mechanical oil pump that is driven by an engine; an electric oil pump that is driven by an electric motor; a hydraulic pressure control circuit that is supplied with oil from the mechanical oil pump and the electric oil pump through an oil discharge passage for the mechanical oil pump and an oil discharge passage for the electric oil pump, the oil discharge passage for the mechanical oil pump and the oil discharge passage for the electric oil pump being connected to each other at a junction point upstream of the hydraulic pressure control circuit; a lubrication/cooling oil passage that is supplied with the oil from the hydraulic pressure control circuit; and a communication passage that branches off from the lubrication/cooling oil passage and that is supplied with the oil from the electric oil pump via the hydraulic pressure control circuit, the communication passage providing communication between the lubrication/cooling oil passage and the mechanical oil pump, wherein a pump-side port of the communication passage is connected to an oil intake passage for the mechanical oil pump, at a position close to an inlet port of the mechanical oil pump.