Patent ID: 7413417
Filing Date: 2008-08-19
Classification: F16H,Y10S

Abstract:
1. A motor vehicle drive arrangement, comprising a motor vehicle drive gear mechanism ( 2 ) with a variable transmission ratio for transmitting torque in a drive train between a vehicle travel drive motor ( 4 ) and at least one motor vehicle wheel, an oil pump ( 6 ) for supplying the drive gear mechanism ( 2 ) with pressurized oil for operating shifting elements and for cooling the drive gear mechanism ( 2 ), and an electric motor ( 8 ) for driving the oil pump ( 6 ) with permanent drive connection ( 10 ) between the electric motor ( 8 ) and the oil pump ( 6 ), and neither the electric motor ( 8 ) nor the oil pump ( 6 ) having a mechanical drive connection to the torque transmission path of the vehicle drive train, the oil pump ( 6 ) and its electric motor ( 8 ) being arranged on the transmission input side of the drive gear mechanism ( 2 ), and a space ( 14 ) being provided between the arrangement of the oil pump ( 6 ) and of its electric motor ( 8 ) and the vehicle travel drive motor ( 4 ), said space ( 14 ) including a torque transmission device ( 16 ) for transmitting torque between the vehicle travel drive motor ( 4 ) and the torque transmission device ( 16 ) and the travel drive gear mechanism ( 2 ), the torque transmission device ( 16 ) including at least one of the elements comprising a clutch ( 18 , 20 ), a torque converter and at least one further electric machine, positioned in the space ( 14 ), the oil pump ( 6 ) and its electric motor ( 8 ) being disposed around a transmission input shaft ( 22 ) of the vehicle travel drive train extending to the drive gear mechanism ( 2 ), with its rotor ( 11 ) being arranged in a housing ( 42 ) in an oil chamber ( 60 ) through which oil from the oil pump ( 6 ) is conducted, the oil chamber ( 60 ) being delimited by the electric motor housing ( 42 ) and by the pump housing ( 5 ), and the rotor ( 11 ) of the electric motor ( 8 ) extending between these two housings and being spaced from the two housings so that oil passages are formed between the rotor ( 11 ) and the two housings ( 42 , 5 ).