Development Prospective of EGR System Applied on Gasoline Engine—A Review

Abstract

With the fuel consumption regulations and emission standards becoming more and more stringent, many new technologies have been used on gasoline engine, and applying EGR (Exhaust Gas Recirculation) system on gasoline engine is becoming a mainstream. On the basis of giving an introduction to high pressure and low pressure EGR architecture, this paper has elaborated the principle of EGR system, analyzing the advantages of EGR. Then the brake specific fuel consumption improvement of EGR has been put forward with the universal curves of gasoline engine, and emission reducing function of EGR was analyzed and explained. Finally, a conclusion was drawn that EGR system will be a necessary factor of modern gasoline engine.