Patent ID: 8157686
Filing Date: 2012-04-17
Classification: B60K,B60L,F16H,Y02T

Abstract:
1. Power transmission device for a motor vehicle, comprising: a heat engine having an engine shaft and wheels having a shaft of wheels, a first electrical machine with a first machine shaft and a second electrical machine with a second machine shaft, and a mechanical assembly connecting the shaft of the engine, the first and second machine shafts and the shaft of wheels to one another, so that the wheels are drivable by any one of the engine, the first machine and the second machine, via the mechanical assembly, an oil or water pump having a pump shaft, a freewheel mechanism that drives the pump shaft, the engine shaft and the first and second machine shafts being connected to the freewheel mechanism, wherein the freewheel mechanism has a first freewheel unit and a second freewheel unit distinct and independent of one another, the first and second freewheel units being ring-shaped and concentric with one another, the pump shaft and the engine shaft being concentric, wherein the first freewheel unit is directly coupled mechanically to the engine shaft, and wherein the second freewheel unit is directly coupled mechanically to an element of the mechanical assembly which is also directly coupled mechanically to the shaft of wheels, wherein the mechanical assembly has a Ravigneaux-type gear train, and the element of the mechanical assembly directly coupled to the second freewheel unit and to the shaft of wheels is a ring gear of the gear train, the first machine shaft is connected, in a first connection mode of the first machine, to a second sun gear of the gear train, and in a second connection mode of the first machine, to the engine shaft, the second machine shaft is connected, in a first connection mode of the second machine, to the shaft of wheels, and in a second connection mode of the second machine, to a first sun gear of the gear train.