EGR is a primary emission control technique for the suppression of NOx, but combustion instability is occurred occasionally due to mal-distribution of fresh air and EGR gas at each cylinder. In this study, to improve EGR distribution characteristics, ...
EGR is a primary emission control technique for the suppression of NOx, but combustion instability is occurred occasionally due to mal-distribution of fresh air and EGR gas at each cylinder. In this study, to improve EGR distribution characteristics, numerical simulations are performed to obtain the flow, the mixing characteristics and the EGR gas distribution at each cylinder for various configurations of individual EGR supply system in a 4-cylinder engine. The results show that the branch diameter has an important role in the mixing and EGR distribution characteristics. Also, the flow of EGR gas is highly depends on the air flow to each cylinder.