Diesel engines work by compressing only the air. This increases the air temperature inside the cylinder to such a high degree that atomised diesel fuel that is injected into the combustion chamber ignites spontaneously. The diesel engine (also known as a compression-ignition or CI engine), named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel which isinjected into the combustion chamber is caused by the elevated temperature ofthe air in the cylinder due to mechanical compression (adiabatic compression).
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