On the Issue of the Degree of Fuel Atomization by Means of Valve and Multi-Nozzle Injectors of Internal Combustion Engines

Methods and means of improving the quality of fuel atomization in combustion chambers of diesel engines are considered in this work. Ignition and combustion of the combustible mixture, carried out in the gas phase, are preceded by evaporation of the fuel, mixing it with air and heating the combustible mixture. The main factors influencing these processes are the fuel physical characteristics, ambient temperature, relative velocity of air and fuel particles, fuel evaporation time and surface evaporation as a function of fuel atomization fineness. It is shown, that the total surface of the sprayed fuel drops has a decisive impact on fuel heating, evaporation and combustion. The use of a valve atomizer contributes to improving the quality of fuel atomization through an annular slot by reducing the minimum size of the spray section.

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