Patent ID: 7255188

Claim:
A hybrid vehicle comprising an internal combustion engine, a crank shaft driven by the engine, a power transmission connected to the crank shaft to transmit power from the engine to a drive wheel that is mounted on an axle, a drive shaft behind the crank shaft and connected to a driven side of the power transmission and also connected to the drive wheel, the drive shaft is not coaxial to the axle, an electric motor connected to the drive shaft, the electric motor including a rotor that is rotatable about an axis that is coaxial with the drive shaft, and the motor is an inner rotor type wherein the rotor comprises an inner rotor, and a unidirectional power transmission provided between the power transmission and the drive shaft capable of transmitting power in one direction from the power transmission to the drive shaft, the unidirectional power transmission is arranged inside the inner rotor and includes an outer clutch member that serves as the inner rotor.