Patent ID: 8298105

Claim:
A hybrid drive device including a motor generator on a power transmission path between an engine and an automatic transmission apparatus, the hybrid drive device comprising: a fluid clutch having a pump impeller, to which a rotational force generated by the engine is inputted, and a turbine impeller being rotated when receiving a fluid from the pump impeller and outputting a rotational force to the automatic transmission apparatus; a first clutch mechanism provided on a power transmission path between the engine and the pump impeller and selectively executing a torque transmission from the engine to the pump impeller and a torque transmission from the pump impeller to the engine; a second clutch mechanism for connecting the pump impeller and the turbine impeller to establish a power transmission therebetween and disconnecting the pump impeller and the turbine impeller to interrupt the power transmission therebetween; and an oil pump integrally rotating with the pump impeller and generating a hydraulic pressure for actuating the automatic transmission apparatus, the first clutch mechanism and the second clutch mechanism, wherein the motor generator integrally rotates with the pump impeller; and wherein the first clutch mechanism is configured with a clutch, which interrupts and establishes a power transmission between the engine and the pump impeller, and a first one-way clutch, which is arranged in parallel with the clutch and transmits a torque only from the engine to the pump impeller.