Experimental Investigation of Combustion Characteristics and Emission in IC Engine by Using Recirculation of Exhaust Gases

Exhausted gas recirculation (EGR) technique is the main subject for the development of internal combustion engine and also one of the most prevalent methods for controlling the nitrogen oxides (NOx) and other exhausted gases from a petrol combustion engine. Present experiment investigation was conducted to explore the EGR impact on emissions and performance in a 4-cylinder, water chilled, direct injection petrol engine. In this study, an experimental study was investigated to find the exhausted gases recirculation (EGR) influence on engine’s emissions and performance for different EGR rate in the engine. The consequences demonstrated that the exhausted gases recirculation (EGR) impact on the engine’s performance is highly increased in term of brake thermal efficacy (ȠBth). Comparing to the reference (standard) combustion case, the brake thermal efficiencies (ȠBth) were 2%, 6.5%, 11.6%, and 15.4% at the EGR rates 95,215,430, and 700 L/M, respectively. Furthermore, a clear decrease in specific consumption fuel brake (Bsfc) was noted with this adopted technique. For emissions, the results were found increasing in HC and CO concentrations with using of EGR technique. The emission of NOx is incredibly reduced from 406-199 ppm with engine’s speeds from 1000-2750 rpm.