Design
In a conventional Otto cycle engine, each cylinder performs four strokes per cycle: intake, compression, power, and exhaust. This means that two revolutions of the crankshaft are required for each power stroke. The split-cycle engine divides these four strokes between two paired cylinders: one for intake/compression, and another for power/exhaust. Compressed air is transferred from the compression cylinder to the power cylinder through a crossover passage. Fuel is then injected and fired to produce the power stroke.
Note: not to be confused with the Split Cycle engine invented by Rick Mayne that used a multitude of small cylinders arranged in a radial arrangement with pistons operated by a geneva mechanism. This engine was never successfully run in a meaningful demonstration, but significant capital was raised through a share plan.
Read more about this topic: Split Cycle Engine
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