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Diesel Engine


An internal combustion piston engine that works by the compression ignition of oil, named after its German inventor Rudolf Diesel who patented it in 1892. Diesel engines are widely used to power lorries, buses, locomotives , ships and many more. They are in general cheaper to run than petrol engines but require more robust construction because of the higher pressures developed inside their cylinders. In the four-Stroke diesel engine cycle, air is drawn into the engine cylinder on the first down stroke of the piston. It is compressed and is raised to a high temperature as the piston moves up. Oil is then injected into the cylinder and ignites immediately, forming gases that force the piston down on its power stroke. On the next (upward) piston stroke the piston expels the burnt gases. Two-stroke diesel engines

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