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최창렬(Changryul Choi),권순혁(Sunhyuk Kwon),조성환(Sunghwan Cho) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
High specific power, additional hardware and mapping optimization was done to achieve reduction of fuel economy for current engine in this study. 2 stage turbocharger with serial configuration was best candidate not only for high specific power at high engine speed but also for increase of low end torque tor current engine. This increase of low end torque is important tor development of transient characteristic of vehicle. DoE and efficient EGR Cooler was applied for optimization of fuel economy. DoE was useful for optimization of fuel consumption affected by various fuel injection parameters. This DoE was also efficient for matching optimal fuel economy after change of engine hardware. Performance improvement of engine with 2 stage turbocharger VGT was evaluated and additional development of fuel economy was performed in this study.
MFB50 값을 이용한 디젤 엔진의 주 분사시기 Closed-Loop 제어
구태형(Taehyung Koo),유성은(Seungeun Yu),최회명(Hoimyung Choi),민경덕(Kyuoungdoug Min),한경찬(Kyungchan Han),김장헌(JangHeon Kim),권순혁(Sunhyuk Kwon),조성환(Sunghwan Cho) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Combustion of diesel engine is very difficult to control due to the combustion characteristic of diesel engine which is compression ignition operated by self-ignition. To improve this weak point and enhance combustion efficiency, sensitive and precise control about operation variables dleing combustion process is needed. In this research, 'Close-Loop Control' is used to accomplish accurate diesel combustion control. At first, control logic is made by ASCET program which controls main injection timing using MFB50 values. Next, experiments at steady state and transient state are fulfilled to correct MFB50 real values to target values in conventional engine. Finally, emission values from controlled mode are evaluated through comparing with uncontrolled mode in real engine operation mode.