Patent ID: 8066492
Filing Date: 2011-11-29
Classification: F04C,F16H,Y10T

Abstract:
1. A drive device for driving an oil pump of an automatic transmission of a motor vehicle, the oil pump ( 6 ) being coupled to a drive motor (M) via an overrunning clutch and a supplementary electric motor ( 22 ) being powered by a vehicle on-board power system, the electric motor ( 22 ) being co-axial to a transmission input shaft ( 4 ) outside of a pump housing ( 8 ) in a separate electric motor housing ( 18 ), and featuring an internal radial rotor ( 28 ), the electric motor ( 22 ) being connected to a driven ring gear ( 10 ) of the oil pump ( 6 ) arranged in the pump housing ( 8 ) such that the electric motor ( 22 ) and the driven ring gear ( 10 ) are rotationally fixed relative to each other, and the rotor ( 28 ) being rotatably mounted in the electric motor housing ( 18 ) and forming a hub extension ( 32 ) that encompasses the transmission input shaft ( 4 ), the rotor ( 28 ) being connected, in a rotationally fixed manner, to the driven ring gear ( 10 ) of the oil pump ( 6 ) via a mechanical drive connection and the rotor ( 28 ) being directly coupled to both the hub extension ( 32 ) and the overrunning clutch ( 34 ).