User:Gwernol/SSCE

The Scuderi Split Cycle Engine design is proposed variant of the four-stroke Otto cycle internal combustion engine conceived by Carmelo J. Scuderi. No working prototype of the engine exists and no data has been made available to demonstrate claims of efficiency made by the Scuderi Group.

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 Scuderi 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. In a standard engine the pistons only fire every other revolution; in comparison the Scuderi Split Cycle Engine fires every revolution. The power cylinder fires just after the piston has begun its downward motion (after top dead center, or ATC). This is in contrast to engine design convention, which calls for combustion just before top dead center (BTC) in order to allow combustion pressure to build. This property of firing ATC is a key feature of the design, and it is claimed this leads to higher efficiency and lower emissions.