Multi-stroke internal combustion engine

Details Multi-stroke internal combustion engine Multi-stroke internal combustion engine

2011-08-16

2011-08-16

Moulis, Thomas N (Department: 3747)

Internal-combustion engines

Convertible cycle

C123S090150, C123S090160, C123S090170

Reexamination Certificate

active

07997237

ABSTRACT:
An example engine method utilizes a first intake valve actuated by a first camshaft once every four piston strokes and a second intake valve actuated by a second camshaft once every four piston strokes, but out of phase with the first intake valve actuation, to provide two-stroke operation. Transitions between two and four stroke operation are provided by deactivation and activation of the second intake valve. In this way, the engine may be selectively operated in a two stroke cycle or a four stroke cycle by activating or deactivating one of the intake valves while another of the intake valves continues to operate.

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