Complete process of SI AND CI ENGINE IN 2 STROKE AND FOUR STROKE

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Accepted Answer

SI and CI engines are used in both 2-stroke and 4-stroke cycles, with differences in fuel injection and combustion processes.

In a 2-stroke SI engine, the intake, compression, power, and exhaust strokes occur in two cycles of the piston, with fuel-air mixture being ignited by a spark plug.
In a 4-stroke SI engine, the four strokes are separate and sequential, with fuel-air mixture being ignited by a spark plug in the combustion chamber.
In a 2-stroke CI engine, the intake, compression, power, and exhaust strokes occur in two cycles of the piston, with fuel being injected directly into the combustion chamber and ignited by compression.
In a 4-stroke CI engine, the four strokes are separate and sequential, with fuel being injected into the combustion chamber and ignited by compression.
Examples of SI engines include gasoline engines, while examples of CI engines include diesel engines.

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