Patent ID: 7195573
Filing Date: 2007-03-27
Classification: B60K,B60W,F16H,Y02T

Abstract:
1. A device for power transmission between a heat engine ( 1 ) and wheels ( 2 ) of a motor vehicle, the device comprising two independent electric machines ( 3 , 4 ), at least two planetary gear trains ( 5 , 15 , 25 , 35 ; 6 , 16 , 26 , 36 ) connecting the heat engine and the electric machines together and to the wheels of the vehicle, a mechanical switching device ( 7 ) providing for the shift from one mode of operation of the transmission device to another, each mode of transmission corresponding to a different range of transmission ratios, the switching device ( 7 ) making it possible to connect one of the electric machines ( 4 ) directly to the wheels ( 2 ) of the vehicle and a drive device controlling the heat engine ( 1 ), the two electric machines ( 3 , 4 ) and the mechanical switching device ( 7 ), in such a way that the operating points of the heat engine and of the electric machines correspond to the minimum instantaneous consumption and make it possible to obtain the requested power at the wheels.