INVESTIGATION OF THE LIQUID FUEL SINGLE-HOLE INJECTION IN THE COMBUSTION CHAMBER

On modern engines fuel injection has completely replaced the carburetor power system. But at the same time, among automakers there is still no consensus about which injection system is preferable, since each of them has its own advantages and limitations. In this work it was conducted the study of the atomization and combustion processes of single-hole injection of liquid fuel in a model chamber of the internal combustion engine. In this injection system air is mixed with fuel in the intake manifold, a complex and sensitive carburetor has been replaced by an injector, therefore this type of spray is called single-point. In multi-hole injection systems an individual injector is installed in the intake manifold of each cylinder, which supplies fuel directly to the intake valve. Thus, the fuel mixture is prepared immediately before being fed into the combustion chamber. Therefore, it turns out to be homogeneous in its composition and approximately the same in quality for each of the cylinders. As a result, this has a beneficial effect on the power and economy of the engine, as well as on the toxicity of exhaust gases. As a result of the computational experiments, the thermal and aerodynamic characteristics of the flow in the combustion chamber were obtained. The obtained computer simulation data were compared with experiments, which showed that the proposed in our work numerical model of liquid fuels spray adequately describes the real processes of atomization and combustion of various types liquid fuels.