Vehicular drive unit

A vehicular drive unit, comprising:

• a combustion engine;
• a motor-generator for one of converting electric energy coming from a battery into mechanical energy to output the converted mechanical energy and for converting mechanical energy into electrical energy to store the converted electrical energy in the battery;
• a planetary gear including at least three rotary elements;
• a continuously variable transmission for changing the revolution of an input member continuously variably to output the changed revolution to drive wheels, wherein said planetary gear has a first rotary element connected to the output shaft of said combustion engine, a second rotary element acting in reaction against said first rotary element and said second rotary element connected to said motor-generator, and third rotary element connected to the input member of said continuously variable transmission;
• and
• split mode control means for controlling the output of said motor-generator by one of adding and subtracting it to and from the output of said combustion engine, said combustion engine held in a predetermined state, so that said third rotary element may have a constant torque but may change its revolution number to satisfy the output required by the vehicle, and for controlling the torque ratio of said continuously variable transmission so that the revolution number of said third rotary element may satisfy the revolution number required by the vehicle.