부산대학교 도서관

In order to comply with increasingly stringent emission regulations, including EURO7, it is necessary to enhancement of fuel evaporation under cold start, when fuel vaporization and atomization are insufficient, and to significantly reduce unburned components that do not contribute to combustion. It has been shown that controlling the in-cylinder gas properties to be equivalent to that at high temperature, fuel vaporization can be accelerated and emission at cold start can be reduced. In this study, the mechanism of cold emission reduction was clarified through high-speed exhaust gas measurements on an actual engine, PN particle size distribution measurements, and combustion observations on a visualized engine.