Speed variation transmission device for motor vehicle powertrain and hybrid motor vehicle using same

摘要

The present invention relates to a speed variation transmission device for a motor vehicle powertrain comprising an epicyclic gear train (26) with a sun gear (36) and a crown (50) connected to shaft (12) of thermal engine (10) of said vehicle, as well as a planet gear carrier (58) connected by a motion transmission track (102) to drive axle (16) of this vehicle.;According to the invention, sun gear (36) and crown (50) are connected each to engine shaft (12) by a controlled coupling (28, 30) and to a fixed part (48a, 48b) of the vehicle powertrain by a one-way coupling (32, 34).

主权项

1. A hybrid type motor vehicle comprising a powertrain with a speed variation transmission device, the transmission device comprising an epicyclic gear train, the epicyclic gear train comprising a first sun gear and a first crown, the first sun gear and the first crown being connected to an engine shaft of a thermal engine of the vehicle, the epicyclic gear train further comprising a planet gear carrier connected by a motion transmission track to a drive axe of the vehicle, characterized in that the first sun gear is connected to the engine shaft by a first controlled coupling and to a first fixed part of the vehicle by a first one-way coupling, the first crown is connected to the engine shaft by a second controlled coupling and to a second fixed part of the vehicle by a second one-way coupling, and a second sun gear and a second crown are not connected between the first sun gear and the first controlled coupling or the first crown and the second controlled coupling,
characterized in that the vehicle further comprises an electric machine electrically connected to electric accumulators, and a rotor of the electric machine is connected to the motion transmission track, and characterized in that the transmission track comprises a sliding pinion, and the sliding pinion is configured to connect a toothed wheel to the epicyclic gear train and/or to the drive axle.