Abstract: A plug-in hybrid accessory belt drive system comprising a vehicle engine accessory belt drive, the accessory belt drive comprising engine accessories, a motor/generator engaged with the accessory belt drive, the motor/generator for driving the accessory drive, a rechargeable electrical energy source connected to the motor/generator for driving the motor/generator on demand, the rechargeable electrical energy course connected to a vehicle electrical load, and the rechargeable electrical energy source connectable to a recharging energy source.

Abstract: The present invention relates to a cooling device for inverter and DC/DC converter (LDC) elements for hybrid electric vehicle (HEV) and, more particularly, to a cooling device for inverter and LDC elements for HEV that enhances the cooling efficiency by applying a cooling device that uses a heat pipe principle to convect coolant to an inverter system that radiates heat of high temperature.

Abstract: When a shift lever is in a parking position, a rotation restriction index Jm2 is set based on a drive state of an engine or a first motor (S130, S160, S240, and S290). A current value based on the rotation restriction index Jm2 is set to a current command of the d axis in an electric angle when motoring of the engine in a stop state is started and a second motor is controlled such that the magnetic field direction of a stator of the second motor is fixed. This method can appropriately prevent a power shaft from rotating.

Abstract: A control system for a hybrid vehicle, in which an engine is connected to a first motor generator and to an output shaft through a power distributing mechanism (12), in which a second motor generator is connected to the output shaft through a transmission (6) wherein a torque capacity is varied in accordance with an oil pressure, and which has an electric oil pump (OPM) for generating an oil pressure, comprising: an oil pressure judging means for judging whether or not the oil pressure established by operating OPM is raised higher than a preset value; an electric oil pump output lowering device for lowering an output of OPM in case the oil pressure judging device judges that the oil pressure is raised higher than the preset value; and a cranking device for carrying out a cranking of E/G by the first motor generator.

Abstract: A hybrid drive system is provided which includes a first damper that is connected to an output shaft of an engine; an electric motor which is provided adjacent to the first damper and connected to the output side of the first damper; a power split device that distributes power from the engine to the electric motor and a wheel side output shaft; and a second damper that is connected to the output side of the first damper between the first damper and the electric motor. Accordingly, a hybrid drive system can be provided which reduces vibration caused by resonance of a torsional damper without increasing the size of the hybrid drive system.