- Split cycle engine
The split cycle engine is a type of
internal combustion engine .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 thecrankshaft 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.History
The Backus Water Motor Company of
Newark, New Jersey was producing an early example of a split cycle engine as far back as 1891. The engine, of "a modified A form, with the crank-shaft at the top", was water-cooled and consisted of one working cylinder and one compressing cylinder of equal size and utilized aHot-tube ignitor system. It was produced in sizes ranging from 1/2 to 3 horsepower and the company had plans to offer a scaled-up version capable of 25 horsepower or more. [ [http://www.lindsaybks.com/arch/backus/index.html The Backus Gas Engine --- Reprint of a January 15, 1891 "American Machinist" article] ]The
Twingle engine is a two stroke engine that also uses a displacer piston to provide the air for use in the power cylinder. This was patented in 1912.References
ee also
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