INVESTIGATION OF ENGINE INTERNAL COMBUSTION TO REDUCE EXHAUST EMISSION: A REVIEW

Biofuels are derived from vegetable oil or animal fat or non-edible oils such as Jatropha methyl ester (JME), Coconut (CME), Soybean Methyl Ester (SME) by chemical or physical process, and palm Ester (PME). However, the supply of these biofuels is limited and emissions of NOXCO, HC, Soot, PM, etc., which burn these fuels have a negative impact on the environment. Reducing exhaust emissions, the exhaust gas recirculation (EGR) is used that can make the exhaust gas into engine chamber again, then make the fuel air ratio thin when the combustion timing can be used to generate eddy currents in air and fuel mixing due to changes in the engine ignition delay or the shape of the piston used. In recent years, environmental and air pollution are mainly problems due to emissions of diesel engines and other vehicles, which may be related to different health effects. In the past few years, the vehicles have caused serious air pollution due to exhaust emissions, so we can solve the effort to find biofuels to reduce air pollution. In this paper, the main problem is that how to solve the carbide, PM, soot, nitride emissions. Therefore, this paper analyzes and compares the emissions and health effects of various biofuels, and the methods minimize the emissions of fuels that can be found during the combustion process.