DefinePK

Abstract

One of the main challenges for the engine manufacturers is to reduce engine emissions to match Euro IV and Euro V standards. Many techniques have been adopted to improve the combustion process and reduce emissions. In this study, the effect of Exhaust Gas Recirculation (EGR) on performance and emissions of 4-cylinders Gasoline engine was investigated. A model was built using GT-Power professional software. The model was equipped with catalytic converter and EGR controller. The EGR were varied from 0.2 to 0.05 fraction. The engine speed was 4000 rpm and kept constant for all simulation runs. The engine torque, power, efficiency, fuel consumption, and emissions were calculated and discussed. The results showed that, the decrease of EGR ratio increase engine torque, power, and brake efficiency; while decrease fuel consumption. Moreover, the increase of EGR ratio resulting in decreased NO and HC and increased CO emissions.