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김종춘(J.C.Kim),정일록(I.R.Jung),박용희(Y.H.Park),황순홍(S.H.Hwang) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
In this study, In-use vehicle emission were investigated/compared in operating conditions for gasoline and LPG vehicles produced during 1988-1995. The following conclusions could be drawn from the study.<br/> 1. Non-load operating condition and load condition were carried out for 153 in-use gasoline as well as LPG vehicles. The exhaust emission of HC and CO in non-load operating condition was two times higher than load operating condition, but the emission of NOX was 87.0 % higher in the load operating condition.<br/> 2. The load operating condition, which is similar to practical operating condition, turned out to be more appropriate for the measurement of NOX emission. A lot of research for reducing NOx measures are proceeding in developed country because vehicle which exhaust gas purification system burn downed, exhaust a lot of NOx in this case Therefor our country should be established by the law for reducing NOx anf develop the operating procedures and test limit.<br/> 3. The one of test procedure is applicable of exhaust emission test procedure for loaded operating because 50% loaded 25mile speed's operating condition and 25% loaded 15 mile speed's has similar to the results of exhaust emission and is forecasted same exhaust emission reduction.<br/>
운행중인 승용차의 공연비 변화에 따른 배출가스 특성에 관한 실험적 연구
김종춘(J. C. Kim),한영출(Y. C. Han),엄명도(M. D. Eom),강호인(H. I. Kang) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
In gasoline engine, it is well known that the combustion mechanism is spark-ignition by mixing the air and fuel. The change of excess air ratio causes to the change of combustion conditions, the exhaust emissions are changing as a result. In this study the characteristics of exhaust emissions for in-use passenger cars (gasoline and LPG) were investigated by changing the execss air ratio. The excess air ratio and exhaust emissions were measured at idling state(emission measurement method for in-use vehicles in Korea) as well as fast idling state (measures at 2500rpm, used in U.S.A) and common exhaust emissions such as CO. CO₂ HC and O₂ were analyzed.<br/>
김종춘(J.C. Kim),엄명도(M.D Eom),박용희(Y.H Park),이종태(J.T Lee),이상문(S.M Lee),신용호(Y.H. Shin) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1
At this study. the research showed the compared analysis results for the limited regulation of emission gas CO. HC. Nox. Also. it classified by combustion system. displacement. odometer and before-after of maintenance among 47 vehicles of 50250cc 5 fleets which made in Korea. 55 vehicles of 400-1800cc 7 fleets which imported. It is 102 vehicles of 12 fleets in total. Regarding some vehicles below 50cc. We compared the difference of emission gas and visible colors according to various engine oils.<br/> The test methods of emission gas are as follows.<br/> The vehicles of below 50cc is tested by ECE-47 mode. And the others is tests by ECE-40 mode.<br/>
김종춘(J.C. KIM),엄명도(MD. EOM),이종태(J.T. LEE),유영숙(Y.S. LYU),곽숙철(S.C. GWOAKk),전상진(S.G. JEON) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
LPG engines are similar to the gasoline engines. But there are some differences betwee them because liquid phase LPG have to be vaporized. Most of current LPG vehicles use the mixer type fuel system. While the new LPG vehicle technique LPLi(Lidquid Phase LPG Injection) is now developing. This technique will give the solution for emission and cold start problems.<br/> In this study, we investigated the emission characteristics of LPLi type and mixer type, and also studied the effects of LPG fuel composition on the emission characteristics.<br/> The results of this study are as follows. When tested with 90% butane fuel, two mixer type vehicles test results show that the one which has longer driving distance emitted more pollutants in the range of 49-92%. And compared LPLi type with mixer type when drived by CVS-75mode, LPLi type vehicles emitted less pollutants about 25~56%. When tested wit various composition fuels, mixer type emitted more VOCs than LPLi type regardlees of fuel composition, but the emission characteristics are similar in both vehicle type.
LPG자동차의 연료성분에 따른 오염물질 배출특성에 관한 연구
김종춘(J.C Kim),엄명도(M.D Eom),박용희(Y.H Park),이종태(J.T Lee) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_1
A Study of Exhaust Emission Characteristics Depending On Fuel Contents of LPG Vehicles. <br/> Diesel engine vehicles emitting the particulate matters (PM) and Nitrogen Oxides (NOx) into the air take 29% of the whole car population in Korea, which is higher than that of the advanced countries.<br/> Therefore, the government is encouraging to use LPG fueled vehicles in place of diesel fueled vehicles, and the number of LPG vehicles is increasing.<br/> The LPG having less carbons in molecular structure compared with gasoline is evaluated as clean fuel as it creates less hydrocarbon (HC) and carbon dioxide (CO2), and less PM and NOx.<br/> However, the current fuel supply system of an LPG engine supplying the fuel into an engine is of a mixer type by which fuel is supplied in a gas state, and the air-fuel ratio is not controlled as precise as the liquid injection type used in a gasoline engine, and it results in more emissions as the engine ages due to varying air-fuel ratio.<br/> Therefore, it is inevitable to develop a technology enabling a liquid injection of LPG to achieve low emission of LPG vehicles. LPG is a mixture of butane and propane which have different number of carbon and hydrogen, and it causes difficulty in starting a cold engine in winter affecting emissions as well.<br/> Therefore, by changing the contents butane and propane of LPG and by measuring and analyzing the emission in different driving modes, the study is focused on finding a fuel suitable for an LPLi system to be developed in the future.<br/> As a result, it was learned that the emission is dependent on the fuel content, i.e. higher rate of propane causes less emission in general.
김종춘(J.C.Kim),정일록(I.R.Jung),황순홍(S.H.Hwang),장은성(E.S.Jang) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
Exhaust emission characteristics was investigated on gasoline vehicle which exceed by exhaust emission guarantee period(5 year:80,000 km). Before exhaust emission control equipped parts of vehicle which exceed by exhaust emission guarantee period(5 year:80,000 km). each pollutants emission was HC 0.41g/km, CO 4.17g/km, NOx 0.62g/km. These HC and CO emission was double of exhaust emission standard within exhaust emission guarantee period. After repair of these gross pollutant emission vehicle, each pollutant emission was HC 0.16g/km, CO 1.06g/km, NOx 0.19g/km. These emission characteristics was similar to new vehicle's. Although exhaust emission of vehicle was not related uesd year, Exhaust emission was highly increased on 5 year over used vehicle.<br/>
DME와 경유연료의 사용에 따른 자동차배출가스 특성 비교
김종춘(J.C. Kim),서충열(C.Y Seo),곽순철(S.C Gwoak),이종태(J.T Lee),강대일(D.I Kang),박정민(J.M Park),임윤성(Y.S Lim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, lots of researchers have been attracted to develop various alternative fuels and to use renewable fuels in order to solve the exhaust emission problems. DME(Dimethylether) is synthetic fuel, and can be produced from natural gas, coal and biomass. The emission is clean because it contains little sulfur and aromatic components In this study, the fuel was tested to investigate the applicability as an alternative fuel for diesel. This study was carried out by comparing the exhaust emissions and performance of diesel engine with DME, ULSD(ultra low sulfur diesel), respectively In order to measure regulated emissions, CO, NOx, HC, PM, from vehicle different diesel fuel types were used on chassis dynamometer CVS(constant volume sampler)-75 mode.
류정호(J.H.YOU),정일록(I.R. CHUNG),엄명도(M.D.EOM),김종춘(J.C.KIM),신영조(Y.J.SHIN),임철수(C.S.LIM),이호영(H.Y.LEE) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
The effects of sulfur content of diesel fuel on oxidation catalyst were investigated using from 0.2 weight % to 0.05 weight % sulfur content fuel on engine dynamometer and the characteristics of the emission reduction were tested using the prepared catalyst at various operating conditions such as T-6 mode with and without Pt/V and Pt catalysts in the exhaust system.<br/> In addition. the prepared catalytic converter was installed to a heavy-duty diesel engine and light-duty diesel vehicle. Then the emission reduction performance of Pt/V and Pt catalyst was also compared with each regulation test mode such as D-13 CVS-75 mode<br/> The emission reduction performance of Pt catalyst with respect to CO, HC, SOF and aldehyde was found to be a little bit higher than that of Pt/V catalyst, but Pt catalyst showed the innate disadvantage of causing the increase of PM due to the sulfate formation via high SO₂ conversion at high exhaust temperature especially above 500℃ in heavy-duty diesel engine.<br/> In the D-13 mode, PM reduction efficiency of Pt catalyst equipped heavy-duty diesel engine is lower than that of Pt/V catalyst caused by increasing sulfate in the high exhaust temperature but in the CVS-75 mode. Pt catalyst equipped light-duty vehicle showed higher PM reduction efficiency than that of Pt/V catalyst.<br/>
디젤기관에서 산화촉매장치에 의한 배출가스 저감에 관한 시뮬레이션 연구
한영출(Y. C. Han),김종춘(J. C. Kim),김재섭(T. S. Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
Among aftertreatment devices which reduce exhaust gas of diesel engine, diesel oxidation catalyst(DOC) with high reduction efficiency for gaseous matter and particulate matter is now studied actively. In this study, a transient one-dimensional model developed to simulate the thermal and conversion characteristics of adiabatic monolithic converterss operating under warm-up conditions is presented. This model takes into account the gas-solid heat and mass transfer, axial heat conduction. chemical reactions and the related heat release. The model has been used to analyze the transient response of an axisymmetric catalytic converter during a warm-up as a function of catalyst design parameters and operation conditions in order to observe their effects on th e lightoff behaviour. The experimental test was carried out in two steps: the first on a sample for lightoff test and the second on 2400 cc light diesel engine whthDOC.