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AssigneeCummins Inc.
InventorsChunyi Xia, Andrew W. Osburn, David B. Snyder, Adam C. Cecil, Anant Puri, Ming-Feng Hsieh, Timothy Shipp
Estimating the term…
In a system having a hybrid powertrain having a piston internal combustion engine, and a motor/generator, and the motor generator being coupleable to a clutch and thereby to a gearbox, the engine further being equipped with a valvetrain control system operable to change the engine valve operation between a first mode in which the engine can operate in a conventional internal combustion mode and a second mode in which pumping losses are reduced when the engine is not operating in a conventional internal combustion mode. This allows it to be rotated without generating power, in a hybrid mode, with minimal losses.
A hybrid powertrain having a piston internal combustion engine, and a motor generator, and the motor generator being coupleable to a clutch and thereby to a gearbox, the engine further being equipped with a valvetrain control system operable to change an engine valve operation between a first mode in which the engine can operate in a conventional internal combustion mode and a second mode in which pumping losses are reduced when the engine is not operating in the conventional internal combustion mode.
The powertrain as claimed in 1, wherein the motor/generator is coupled permanently to the engine.
A method of operating a hybrid powertrain having an internal combustion engine coupled to a motor/generator and a valvetrain controller operable to selectively open and close engine valves, the method comprising:
A non-transitory, computer-readable medium, storing instructions that, when executed by a computer operating a hybrid powertrain having an internal combustion engine coupled to a motor/generator and a valvetrain controller operable to selectively open and close engine valves, causes the computer to perform the steps of:
Dependencies are inferred from the claim text.