Dual-pump fluid distribution system for a hybrid electric vehicle

摘要

The dual-pump fluid distribution system of the present invention preferably includes a sump having hydraulic fluid disposed therein. A first pump driven by an electric motor and a second pump driven by an engine are disposed in fluid communication with the sump. A plurality of vehicle systems are disposed in fluid communication with the first and second pumps. The first pump is configured to transfer hydraulic fluid to the vehicle systems when the engine is off. The first and second pumps are both configured to transfer hydraulic fluid to the vehicle systems when the engine speed is at or below a predetermined value. The second pump is configured to transfer hydraulic fluid to the vehicle systems when the engine speed exceeds the predetermined value. Accordingly, the hydraulic pressure needs of the vehicle systems are met for any given engine speed. A corresponding method in accordance with the present invention is similarly provided.