Internal combustion engines for hybrid powertrain

Details Internal combustion engines for hybrid powertrain Internal combustion engines for hybrid powertrain

2006-04-18

2006-04-18

Phan, Hau (Department: 3618)

Motor vehicles

Power

Electric

C180S065510

Reexamination Certificate

active

07028793

ABSTRACT:
A hybrid powertrain and method for operating same in which the operation of the engine is modified to effect an improvement in the fuel economy and/or emissions performance of the hybrid powertrain. In one embodiment, the battery of the powertrain is employed to provide auxiliary heat to an engine aftertreatment system to thereby improve the effectiveness of the aftertreatment system. In another embodiment, various components of the engine, such as a water pump, are wholly or partly operated by electric motors that receive power from the battery of the powertrain. In another embodiment, engine braking can be employed in situations where regenerative braking does not provide sufficient braking torque. In a further embodiment, the engine valves may be selectively opened to reduce pumping losses associated with the back-driving of the engine.

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