Patent ID: 7469778
Filing Date: 2008-12-30
Classification: B60K,B60L,F16D,Y02T,Y10S

Abstract:
1. A drive unit ( 1 ) arranged between an engine ( 2 ) and a power transmission ( 4 ) of a hybrid motor vehicle for coupling at least one of an internal combustion engine ( 2 ) and an electrodynamic machine ( 3 ) in the form of a motor generator ( 6 ) to the power transmission ( 4 ), said drive unit ( 1 ) comprising an input shaft ( 5 ) which is connected to the internal combustion engine ( 2 ) for rotation therewith, and an output shaft ( 7 ) which is connected for rotation with the power transmission ( 4 ), said motor-generator ( 6 ) being connected to said output shaft ( 7 ) for rotation therewith and a clutch ( 8 ) arranged between said input shaft ( 5 ) and said output shaft ( 7 ) for coupling said engine to said output shaft ( 7 ), said clutch ( 8 ) including friction shoes ( 10 ) mounted so as to be rotatable with the output shaft ( 7 ) for the frictional engagement with the input shaft ( 5 ), spring means ( 12 ) for establishing the frictional engagement between the friction shoes ( 10 ) and the input shaft ( 5 ) and centrifugal weights ( 11 ) supported by said output shaft ( 7 ) and engaging said friction shoes ( 10 ) for lifting the friction shoes ( 10 ) out of their engagement with the input shaft ( 5 ) when the output shaft ( 7 ) reaches a predetermined speed, and a one-way coupling ( 9 ) arranged in said drive unit ( 1 ) in parallel with said clutch ( 8 ) for connecting the input shaft ( 5 ) to the output shaft ( 7 ) via the one-way coupling ( 9 ) for transmitting engine torque to said output shaft ( 7 ), said clutch ( 8 ) being disengaged during power operation of the internal combustion engine so that an engine power torque is transmitted to the output shaft ( 7 ) exclusively via the one-way coupling ( 9 ).