Patent ID: 7694773

Claim:
A hybrid electric motor vehicle having an internal combustion engine, a transmission to transmit power from the engine to a front pair of wheels through a front final drive unit and to a rear pair of wheels through a rear final drive unit and an electric motor/generator to drive one of said pairs of wheels, the electric motor/generator being arranged in one of the final drive units and comprising a casing, a stator and a rotor, the stator being fastened with the casing and the rotor driving said one pair of wheels through a reduction gearing arrangement and a differential and the electric motor/generator being arranged transversely in said one of the final drive units, the rotor of the electric motor/generator being hollow such that a drive shaft connecting the differential to one of said one pair of wheels extends concentrically through the rotor, wherein the reduction gearing arrangement comprises a layshaft reduction gear train including a spur input gear driven by the electric motor/generator, a large diameter spur gear and a small diameter spur gear fixed on a layshaft and a large diameter driving gear fastened with the differential, the large diameter spur gear meshing with the spur input gear and the small diameter spur gear meshing with the large diameter driving gear.