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균일혼합기 가솔린 직분사 엔진의 다중 영역 유사차원 해석을 통한 배기 및 노킹 예측
이재서(Jaeseo Lee),허강열(Kang Y. Huh),권혁모(Hyuckmo Kwon),박재인(Jae In Park) 한국연소학회 2013 한국연소학회지 Vol.18 No.1
A quasidimensional program is developed for a four stroke cycle homogeneous GDI(Gasoline Direct Injection) engine. It includes models for spray, burning rate and chemistry to predict knock and emissions. With early injection a homogeneous GDI engine goes through spark ignited, turbulent premixed combustion as in PFI(Port Fuel Injection) engines. The cylinder charge is divided into unburned and burned zone with the latter divided into multiple zones of equal mass to resolve temperature stratification. Validation is performed against measured pressure traces, NOx and CO emissions at different load and RPM conditions. Comparison is made between an empirical knock model and predictions by the chemistry model in this work.