Patent ID: 8074753

Claim:
A drive device of a vehicle comprising: a first rotating electric machine; a circulating mechanism for lubricating oil lubricating and cooling said first rotating electric machine; a power control unit controlling said first rotating electric machine and cooled by heat exchange with said lubricating oil; and a casing accommodating said first rotating electric machine, said circulating mechanism and said power control unit, and provided with a circulation path of said lubricating oil, wherein: said vehicle includes an internal combustion engine used together with said first rotating electric machine for rotating a wheel, said casing is in contact with said internal combustion engine in a thermally conductive fashion, a heat of said lubricating oil is transmitted to a housing of said internal combustion engine through said casing, said housing of said internal combustion engine is provided with a water passage circulating cooling water, and said casing has a radiator projection projected into said water passage.