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The Principle of Operation of a Diesel Engine (Basic Knowledge of Diesel Engines)

A diesel engine operates in four (intake-compression-combustion-exhaust) strokes. In the engine, the work is achieved by pushing the piston down and rotating the crankshaft of the connecting rod, the pressure created by the diesel-air mixture that burns by exploding at the time of combustion. 

For combustion, three basic components are required: combustible (air-oxygen), combustible (diesel) and temperature (temperature formed as a result of compression). Combustion in a diesel engine occurs as follows; the piston compresses the air at the time of compression, and the pressure and temperature of the air increase, while in very hot air, the fuel ignites by pressurizing the fuel at the time of compression, igniting the fuel.  In order for the diesel engine to burn, the air compressed in the cylinder must have a minimum temperature of 400-500 oC. 



78% of the air is Nitrogen and 21% oxygen, the more air (oxygen) can be supplied to the cylinders in a diesel engine, the more combustion-performance will increase. However, since most of the air is nitrogen, as a result of the reaction of nitrogen(N) with oxygen (O) during combustion, a lot of harmful nitrogen oxide (NOx) emissions are released in diesel engines

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