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김용태(Yongtae Kim),배상수(Sangsoo Pae),민경덕(Jyoungdoug Min) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To simulate the combustion process under stratified charged conditions, like GOI engines, the new combustion model is proposed, which is based on Weller's FAE model and Peters' PDF model for considering primary reactions. In addition to these models, the new laminar burning velocity correlation and diffusion flame model are also included in the proposed model. The former can be applicable to much wider range of equivalence ratio, pressure and temperature than the others, such as Keck's and Guider's models, and the latter has been derivred from water-gas shift reaction and hydrogen oxidation, by which the secondary reactions can be considered after primary reactions.<br/> 3-D computation has been performed by using STAR-CD v3.05 in the simple cylindrical geometry under stratified charged condition. Judging from the calculated results, the present model proves to be reasonable to simulate the characteristics of name propagation and concentrations of products in burned regions.<br/>
[디젤엔진부문] 축소 화학반응 모델링에 의한 탄화수소 연료의 점화지연 특성
김형욱(Hyunguk Kim),배상수(Sangsoo Pae),민경덕(Kyoungdong Min) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Reduced chemical kinetics model has been derived, which can be applicable for ignition model of hydrocarbon fuels, and contains 23 reactions and 18 species. The present model is validated with the experimental data, where the ignition delays of several hydrocarbon fuels, such as n-heptane, i-octane, n-decane and DME(dimethylether), are measured as equivalence ratios are varied. Especially, the effects of different fuels on ignition delays can be explained by changing the rate constants of three reactions among the present model. As a result, the proposed model can be applicable to two stage ignition model of Diesel combustion
이성하(Sungha Lee),문두성(Dusung Moon),방성훈(Sunghun Bang),강호균(Hogyoun Kang),배상수(Sangsoo Pae),조성문(Sungmun Cho) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11
Fuel economy of the engine can be improved by reducing output pressure of the engine oil pump. This paper presents electronic pressure feedback control system which controls oil pressure of the engine lubrication system. We developed oil pressure feedback control system which runs according to engine operating condition by integrating variable oil pump, sensors and control logic. Dual-chamber type variable oil pump is controlled by proportional solenoid valve using hydraulic pressure of the engine oil. Evaluation result showed that fuel economy was improved by reducing oil pressure using developed continuously controlled variable oil pump system.
EGR을 이용한 승용디젤엔진의 오일웜업 특성에 관한 연구
한정재(JungJae Han),정충수(ChoongSoo Jeong),김중현(JoongHyun Kim),김태우(TaeWoo Kim),박성진(SungJin Park),정영록(YoungRock Chung),배상수(SangSoo Pae) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
During a cold start, engine consumes more fuels compared with in hot operating condition. Because high viscosity of engine oil at low temperature increases mechanical frictions and thermal losses. Therefore, many warm up devices were researched about shortening its heat-up time to reduce mechanical frictions and fuel consumptions for decades. An exhaust gas with high temperature and volumetric flow rate can provide a possibility of high thermal potential to an engine. In this paper, heat exchanger system was consisted of engine oil circuit and heating components installation using EGR. The oil heater stand on CFD and engine numerical optimization applied to real engine test. And it is analyzed the effects of engine oil heater about the warm-up characteristics of engine variables and the fuel consumption in WLTP cycle. The results were compared with analytical modeling and engine bench test results in WLTP cycle.