Effect of Inlet Air Pressure and EGR Rate on the Diesel Engine Emission

by using D.I. Engines, main pollutants contributed are NOx, Co, unburned hydrocarbons (HC) and other particulate emissions. This paper mainly focuses on reducing exhaust emission and energy saving by investigating diesel combustion with Exhaust Gas Recirculation (EGR) system. The number of experiments was conducted on a four stroke direct injection water cooled constant speed diesel engine with EGR systems. In the experiment, EGR system was made individually and also with varying inlet air pressure. In this experiment, compressor was used to pressurize the intake air. The experiments were held away to measure the emission event at different EGR rates and varying inlet air pressure of the Diesel engine. In the result, emission effect such as NOx, Co, Hc were observed. So the modified engine provides greater NOx reduction and better fuel economy without reducing useful characteristics (brake power, brake thermal efficiency etc.) of the Diesel engine.