Reduction of Pollutant Emission of I.C Engine

The automobiles play an important role in the transport system. With an increase in population and living standard, the transport vehicles as well as car, bike population is increasing day by day. The main pollutants contributed by I.C. engines are CO, NOX, unburned hydrocarbons (HC) and other particulate emissions. Lot of efforts are made to reduce the air pollution from petrol and diesel engines and regulations for emission limits are also imposed in few cities of India. Various emission control technologies exist for IC engines which can afford substantial reductions in all four criteria pollutants listed above. However depending on whether the engine is being run rich, lean, or stoichiometrically and the emission control technology used, the targeted emissions vary as do the levels of control. PM emissions from stationary diesel engines are more of a concern than those for IC engines using other fuels. ceramic coatings applied to the combustion zone surfaces of the piston crown, valve faces, and head have shown the ability to significantly reduce NOx and PM emissions in diesel engines.