Abstract: Spark ignited and Compression ignited internal combustion engines are the two types under the classification of IC engines based on ignition mechanism. In spark ignited IC engines the pressurized air fuel mixture will be given the spark ignition in the chamber just after sufficient fraternization where as in compression ignited IC engines the pressurized air gets ignited of the fuel spray in the chamber. In spark ignited engines, a carburetor may be used where the fuel and air gets mixed and the resulting mixture will be supplied to the chamber, or electronic controlled mechanism may be used where based on the load and required speed the concentration of fuel in the mixture will be varied whereas it is usually fixed in the carburetor based systems. In compression ignited engines, the spraying mechanism is crucial for satisfactory combustion. The injector may be moved toward the chamber and in the reverse direction. The number of nozzles and the angle of injection of fuel may be varied. In this paper, the above described phenomena are modeled and results are compared.
Keywords - air-fuel mixture, nozzle, injector, bowl axis.
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