MPI Dual Injection 엔진의 온도 조건 변화에 따른 엔진 내부 유동 및 연료 거동 특성에 관한 연구

Abstract

The MPI dual injection engine can enhance the fuel efficiency and engine power. By using one injector perone intake port, MPI dual injection engine has an excellent fuel atomization and targeting injection. As the basicresearch for the MPI Dual injection engine design, this research was investigated in order to understand thecharacteristic of the in-cylinder flow and fuel behavior according to engine temperature condition and the fuel type inthe MPI dual injection engines. The 3D unsteady CFD simulation for the MPI Dual injection engine was performedusing STAR-CD. The engine operating condition was 2,000 rpm/WOT. The parameters for this study were fuel types,fuel temperatures and wall temperatures. As a result, the intake air amount, evaporated fuel in the cylinder and the fuelfilm on the wall were presented according to parameters that depend on the fuel properties and engine wall temperature. Also, the results were influenced by in-cylinder flow such as the intake flow, back flow and so on.