Patent ID: 7028794

Claim:
A transmission gear apparatus for a motor vehicle, comprising: a dynamo-electric machine designed to operate as an electric motor and an electric generator; dynamo-electric machine changeover control means for changing over operation of said dynamo-electric machine to an electric motor operation mode and an electric generator operation mode; a dynamo-electric machine pulley mounted on a rotatable shaft of said dynamo-electric machine; an auxiliary machine pulley operatively coupled to a rotatable shaft of an auxiliary machine for transmitting a motive power to said auxiliary machine; a crank pulley operatively connected to a crank shaft of an internal combustion engine to be changed over such that said crank pulley can rotate relative to or alternatively integrally with said crank shaft of said internal combustion engine to thereby receive or deliver a motive power; power transmitting means for operatively coupling said dynamo-electric machine pulley, said auxiliary machine pulley and said crank pulley for transmission of rotational motive power to one another; a sun gear operatively coupled to said crank pulley and supported rotatably by means of a bearing; planetary gears each supported by means of bearings so as to be each rotatable around its own axis and revolvable along an outer periphery of said sun gear; a carrier for supporting said planetary gears rotatably and revolvably and connected to said crank shaft; an internal gear meshing at an inner peripheral side thereof with said planetary gears; an electromagnetic clutch for changing over said internal gear between a restrained state and an unrestrained state; electromagnetic clutch changeover control means for electrically energizing and deenergizing said electromagnetic clutch; and a one-way clutch provided between said internal gear and said carrier, wherein said internal gear is coupled to a first side of said one-way clutch and said carrier is coupled to a second side of said one-way clutch.