A Study of Exhaust Gas Recirculation in Diesel Engines

Abstract

This review provides a comprehensive evaluation of the impact of Exhaust Gas Recirculation (EGR) on performance parameters (BSFC, BMEP, and BTE) and emission characteristics  ( and smoke opacity) in diesel engines. By synthesizing existing literature, key findings regarding the effects of EGR on fuel consumption, power output, nitrogen oxide ( ) emissions, particulate matter, and other pollutants are highlighted. The review critically discusses the mechanisms through which EGR influences combustion processes, thermal efficiency, and exhaust gas composition, clarifying the balance between emission reduction and engine performance. Additionally, challenges and opportunities associated with EGR implementation, such as finding the optimum value of the EGR rate without affecting engine performance, are explored. Insights from this review paper offer valuable guidance for optimizing EGR strategies to achieve an equilibrium between meeting emission regulations and maintaining efficient diesel engine operation.