Combustion Simulation of a Four Stroke Single Cylinder S.I Engine for Reducing Emissions

Abstract

The requirement to reduce the pollutants from the atmosphere is currently needed and the major part of it is caused by IC engine, so as to reduce such emissions, an analysis is being carried out in Ansys IC engine Fluent model. A design of basic combustion engine with a bowl type piston is modeled and a simulation is carried out in Ansys 17.1 Workbench. Simulation of combustion cycle from IVC to EVO is being simulated and the pollutants evolved during this process is being calculated and tabulated by varying the pressure and temperature accordingly and obtaining the best outcome possible from it. The design of valves, inlet, and outlet manifolds and a piston is created which would be further decomposed in the simulation software and chamber is created inside which the pollutants data are collected from. By providing the fuel composition that needs to be injected at 4.5° CA bTDC up to 35.5° CA aBDC as it is a gasoline direct injection engine. Spark at 11° CA bTDC is introduced to make sure whole of the fuel is burnt without any unburnt fuel which may produce soot in the system. The results show a variation when the pressure and the temperature of the intake is varied when compared to that of the intake parameter which has high pressure and temperature. The experimental value of pressure 101,325 Pa (1 atm) and temperature 300 K is taken as the initial condition values and is being used as ideal value for comparison and determining the best among the results obtained.