A Survey on EGR System in 2 Stroke SI Engine in Two Wheeler
Many industrious cities face a serious air pollution problem from two wheelers that run on two stroke engines. Since two stroke engines burn an oil gasoline mixture, they emit more smoke, carbon monoxide, hydrocarbons, and particulate matter than the gas run four stroke engines found in newer motorcycles. However, this problem can be reduced by fixing an ERG system to the two stroke SI engines in two wheelers. This EGR system is already been executed in CI engines but an efficient system to control pollution in two stroke SI engines is yet to be designed. In Internal Combustion Engine when combustion chamber temperature reaches 2500oF or 1370oC, nitrogen and oxygen combine to form oxides of nitrogen (NOx).EGR works by recirculating a portion of (10 to 15% exhaust gas to inlet manifold. The recycled exhaust gas lowers the oxygen concentration in the combustion chamber and increase the temperature of intake charge which lowers the flame temperature and leads to lower NOx formation. It also slightly increases the efficiency of the engine.