Patent ID: 7308960

Claim:
A vehicle drive train unit used for a vehicle in which some wheels are driven by an engine and other wheels are driven by a motorized machine; the unit comprising: a motor-generator used for the motorized machine, a capacitor device including at least one of a battery and a capacitor, and a translator for electric power; wherein the motor-generator has a regenerative function for converting mechanical energy of the wheels other than wheels driven by the engine into electric energy during regenerative braking and storing the electric energy into the capacitor device, and a motor function for driving the wheels other than wheels driven by the engine, during power running, with electric power from the capacitor device by way of the translator, wherein the motor-generator, the capacitor device and the translator are integrated into a single assembly, being housed in a housing together; and wherein the assembly is independent of an electric system of the engine, and integrally joined with another housing for a differential gear for transmitting the power of the motor-generator to the wheels such that the assembly is attached to the vehicle together with the differential gear.