Importance

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Abstract

The engines, engine components, and related methods disclosed herein generally involve closing an exhaust valve through which exhaust gasses and other combustion products are evacuated from the expansion cylinder of a split-cycle engine before opening a crossover expansion valve through which a fresh charge of air and/or fuel is supplied to the expansion cylinder. The exhaust valve is preferably closed as late as possible after a combustion event, but with sufficient margin before opening of the crossover expansion valve and, in the case of an inwardly-opening exhaust valve, before valve-to-piston contact occurs. Preferably, the exhaust valve is closed about 0 CA degrees to about 15 CA degrees before the crossover expansion valve is opened.

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First Claim