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대응출력 200마력 선박용 과급기에 의한 디젤기관의 배출특성 연구
이기봉(Kibong Lee),이원욱(Wonuk Lee),이민형(Minhyoung Lee),이치우(Chiwoo Lee) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.11
This is a thesis about the experiment of comparison characteristic of exhaust gas in the same condition between diesel engine that is equipped response power 200HP turbocharger to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment with natural aspiration diesel engine and turbocharger diesel engine, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is much higher than the other one. In other hand, in exhaust gas experiment, turbocharger model exhausts more NOX and O2, but it doesn’t significantly affect the result when it comes with decreasing of CO2 and effectiveness of increased power characteristic. As a result, the turbocharger diesel engine is economically effective comparing with the natural aspiration diesel engine.
대응출력 150마력 및 240마력 터보차저 선박용 디젤기관의 동력성능 및 배출특성 비교에 관한 연구
이민형(Minhyoung Lee),정경철(Gyeongchul Jung),이기봉(Kibong Lee),이원욱(Wonuk Lee),이치우(Chiwoo Lee) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.4
This is a thesis about the experiment of comparison characteristic of power and exhaust gas in the same condition between diesel engine that is equipped turbocharger different from response power to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment with natural aspiration diesel engine and turbocharger diesel engine, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is much higher than the other one. In other hand, in exhaust gas experiment, turbocharger model exhausts more NOX and O₂, but it doesn’t significantly affect the result when it comes with decreasing of CO₂ and effectiveness of increased power characteristic. As a result, the turbocharger diesel engine is economically effective comparing with the natural aspiration diesel engine.
대응출력에 따른 선박용 과급기에 의한 디젤기관의 배출특성 비교 연구
이민형(Minhyoung Lee),이기봉(Kibong Lee),이원욱(Wonuk Lee),이치우(Chiwoo Lee) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.11
This is a thesis about the experiment of comparison characteristic of exhaust gas in the same condition between diesel engine that is equipped turbocharger to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment turbocharger diesel engine according to response power, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is almost the same in four turbocharger. In other hand, in exhaust gas experiment, high response power turbocharger model exhausts less NOX, but it doesn’t significantly affect the result when it comes with decreasing of CO2 and effectiveness of similar power characteristic. As a result, the high response power turbocharger diesel engine is economically effective comparing with the low response power turbocharger diesel engine.
고온가스에 의한 표면부착분자 증발ㆍ제거과정의 분자동역학적 연구
양영준(Youngjoon Yang),이치우(Chiwoo Lee),시바하라 마사히코(Masahiko Shibahara) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The interaction between adherent molecules and gas molecules was modeled in molecular scale and simulated by the molecular dynamics method in order to understand the evaporation and removal processes of adherent molecules on metallic surface using high temperature gas flow. Methanol molecules were chosen as adherent molecules to investigate effects of adhesion quantity and gas molecular collisions because the industrial oil has too complex structures of fatty acid. The effects of adherent quantity, gas temperature and surface temperature for the evaporation rate of adherent molecules and the molecular removal mechanism were investigated and discussed in the present study. Evaporation and removal rates of adherent molecules from metallic surface calculated by the molecular dynamics method showed the similar dependence on surface temperature shown in the experimental results.
심한섭(Hansub Sim),이치우(Chiwoo Lee) 한국자동차공학회 2005 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
Gaseous fuels use to gas power generation systems such as a compressed natural gas (CNG) engine, a hydrogen combustion engine, and a fuel cell system. In these systems, injection rate of gaseous fuels is precisely controlled to improve performances of systems. ln this paper, injection control characteristics of a solenoid valve for gaseous fuel injection are studied. Static and dynamic injection rate for on-time variation of a solenoid valve open signal are measured in basic bench test. The solenoid valve is applied to a CNG engine test for validation of injection rate control performance. The experimental results show that fuel injection rate can be controlled precisely on a gas power generation system such as the CNG engine.
직접분사방식 디젤엔진의 6σ 기법을 적용한 비틀림 최적화에 대한 연구
김장수(Jangsu Kim),이치우(Chiwoo Lee) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5
Due to a low stiffness of cranktrain and a failure experience from a history within short development time, a viscous torsional vibration damper was applied in order to reduce the torsional vibration and keep the high reliability for the durability of cranktrain system in the direct injection diesel engine. As an improvement of the crankshaft stiffness by increasing the diameter of main and pin journal, a rubber type damper could be considered. In this study, the control factors of rubber damper, the moment of inertia ring, stiffness of damper and damping coefficient of ring, were investigated by DFSS method through the analysis work and the measurement in the real engine condition.
T/F Driven Gear 동심도 향상을 위한 브로치 형상에 관한 연구
박세제(SeJe Park),박민철(MinCheol Park),이치우(ChiWoo Lee),이권수(KwonSoo Lee),김동환(DongHwan Kim) 한국자동차공학회 2012 한국자동차공학회 지부 학술대회 논문집 Vol.2012 No.11
Broaching machine is widely used for machining inner shaped slots in the work-pieces, and provides vertical motion (usually hydraulically powered) between tool and work-piece. Broaching process takes place with out fixed while broach tool traversed shearing course. For T/F driven gear is made up out-side blade and in-side blade. The out-side blade determining tooth profile and the in-side blade determining minium dimension. Broaching process can cause problems such as concentricity. Therefore, in this study, the characteristics of shear on cutting blade and T/F driven gear broaching the formability of cutting blade are considered in the shearing process.