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Beginning of Paper
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Internal Combustion Engines
An internal-combustion engine is a heat engine that burns fuel and air
inside a combustion chamber located within the engine proper. Simply stated, a
heat engine is an engine that converts heat energy to mechanical energy. The
internal- combustion engine should be distingui ....
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Middle of Paper
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.... Gottlieb Daimler designed the first high-speed internal-
combustion engine (1885) and carburetor. Rudolf Diesel invented a successful
compression-ignition engine (the diesel engine) in 1892.
The operation of the internal-combustion reciprocating engine employs
either a four-stroke cycle or a two-stroke cycle. A stroke is one continuous
movement of the piston within the cylinder.
In the four-stroke cycle, also known as the Otto cycle, the downward
movement of a piston located within a cylinder creates a partial vacuum. Valves
located inside the combustion chamber are c ....
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