Patent ID: 7909729

Claim:
A control unit for an electric oil pump that supplies a hydraulic pressure to a friction engagement device that enables driving power from an electric motor that is a driving source of a vehicle to be supplied or suspended between the electric motor and wheels of the vehicle, comprising: a one-way valve that permits a circulation of an operating fluid from the electric oil pump to the friction engagement device and blocks the circulation in an opposite direction; an accumulator that is connected to a fluid supply path joining the one-way valve to the friction engagement device and accumulates a hydraulic pressure required for operating the friction engagement device; a hydraulic pressure measuring device that measures hydraulic pressure inside the fluid supply path; a vehicle speed measuring device that measures a vehicle speed of the vehicle; and a pressure setting device that sets a first predetermined pressure based on the vehicle speed measured by the vehicle speed measuring device, wherein when the friction engagement device is in an engaged state and the hydraulic pressure inside the fluid supply path measured by the hydraulic pressure measuring device falls below the first predetermined pressure, the electric oil pump is operated in a high-pressure mode and the hydraulic pressure is supplied from this electric oil pump to the fluid supply path.