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박정권,김현철,정수진,전문수,Park, JungKwon,Kim, Hyunchul,Jeong, SooJin,Chon, MunSoo 한국교통대학교 융복합기술연구소 2013 융ㆍ복합기술연구소 논문집 Vol.3 No.1
The next generation alternative fuel of diesel, DME (Dimethyl Ether) discharges particulate matter hardly due to chemical structural as oxygen-fuel so it has the eco-friendly property. Despite these advantages, the DME has the technical difficulties to apply to the diesel engine because of a low calorific value, viscosity and compressibility effects. From this point of view, we performed experimental studies on improved reliability of DME common-rail vehicle and lubricity enhancement of DME fuel for empirical distribution of eco-friendly DME fuel. Also we analyzed solubility of lubrication enhancer according to a drop in temperature, try to secure reliability about core parts of DME vehicle by applying lubrication enhancer in the DME common-rail vehicle.
연비 개선 및 CO₂ 저감을 위한 승용 디젤 차량의 클러치타입 워터펌프 적용에 따른 실험적 연구
박정권(Jungkwon Park),정수진(Soojin Jeong),이호길(Hokil Lee),오세두(Sedoo Oh),오창복(Changboke Oh) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The present studies for clean diesel engines are focused on the reduction of emissions and the improvement of fuel consumption. Generally, the conventional water pumps driven by a crank shaft through mechanical links prevent fast heating of the engine in the cold starting. It is a major reason that the oil-consumption rate and CO₂ emission were increased. The clutch type water pump (CWP) can force cooling water to supply into an engine by the operation of an electromagnetic clutch equipped as the inner part of pump system. The operation of CWP is decided by temperature of cooling water and engine oil. In this study, CWP was applied on a 2.0 liter diesel engine with CRDi system. The emission and fuel consumption were evaluated under NEDC test mode. Also, tests were carried out at temperature of 70℃, 80℃and 94℃, starting the operation of CWP. As the results, applying CWP can improve the fuel consumption and CO₂ emission of about 3%.
클러치 타입 워터펌프 적용에 따른 승용 디젤 엔진의 냉각수 온도 변화 특성에 관한 실험적 연구
박정권(Jungkwon Park),정수진(Soojin Jeong),이호길(Hokil Lee),오세두(Sedoo Oh),오창복(Changboke Oh) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Recently automotive engines require high performance with low emissions satisfy many emission regulations. Generally, conventional water pump driven from crank shaft through a mechanical link, prevents a fast heating of the engine in the cold phase(Warm-up), leading to increasing oil-consumption rate and CO₂ emission. CWP(Clutch type Water Pump) system get into operation electromagnetic on-off clutch, and incorporated into the overall envelope of the water pump. The CWP is able to improve friction loss of the conventional water pump and engine warm-up time. In addition, CWP is controlled by temperature of cooling water and engine oil. In this study, was investigated for emissions and coolant temperature characteristics which an automotive cooling system controlled by CWP. CWP cooling system was modified in a 2.0 liter CRDi engine, and engine bench test was carried out on a idle condition. Also, CWP engagement controlled 70℃, 80℃, 94℃ for cylinder block temperature of 3 cases though a engine bench test. As results, the engine warm-up time is reduced by 25.74%. Also, 34.07% of THC and 6.3% of CO are reduced.