Experimental Study on Blending of Ethanol & Diesel with EGR System in IC Engine

Internal combustion engines are established as the main power source for the automobile vehicles. At present emission norms becomes strict for any I.C. Engine. The main pollutant are CO, HC, NOx,PM, soot, etc from which NOx are one of the most harmful component. It is possible to limit the negative effect of NOx on the environment by various methods like exhaust gas recirculation (EGR), catalyst and water injection. The aim of this work is to review the effect of exhaust gas recirculation (EGR) to reduce the NOx emission from tailpipe of homogeneous charged C.I.engines. Cooled exhaust gas recirculation (EGR) is a common way to control the NOx generation in engine cylinder .It was found that the thermal resistance and thickness of the fouling layer as well as the fouling rate decrease with increasing gas velocity in EGR coolers It was found that adding EGR to the fresh air charge to homogeneous charged engines will beneficial to reduce the NOx emission substantially. Substantial reductions in NOx emission are achieved by previous investigators with 10% to 30% EGR. ethanol is suitable In diesel engine as a substitute fuel. up to 15% (v/v) ethanol/85% (v/v) diesel fuel blends can be recommended as fuel for diesel engines once flash point and blend stability are improved by the use of additives.