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권석주(Seokjoo Kwon),엄준식(Junsik Um),강은정(Eunjeong Kang),서영호(Youngho Seo) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
In this study, analysis the influence through fuel economy test of gasoline vehicle for each of the various test conditions. (e.g. battery state, cooling fan, laboratory temperature, soaking time) It showed a difference fuel economy results at least about 3 % or more between low (88 %) and high (99 %) battery SOC (State of charge) conditions because alternator saving function gives a positive effects on fuel economy. Fuel economy performance test of laboratory temperature changes were slight fall at 21℃ temperature condition and increase at 29℃ temperature condition. Meanwhile, the fuel economy results of the cooling fan changes were almost negligible level.
임의주행 사이클을 이용한 실제도로 주행 배출가스 특성 모사에 관한 연구
권석주(Seokjoo Kwon),권상일(Sangil Kwon),김형준(Hyung-Jun Kim),서영호(Youngho Seo),박성욱(Sungwook Park),전문수(Mun Soo Chon) 한국자동차공학회 2016 한국 자동차공학회논문집 Vol.24 No.4
This study was conducted in order to estimate the exhaust emissions analysis method of the real driving emission(RDE). The Association for Emissions Control by Catalyst(AECC) has developed a test procedure by using a random cycle method based on the chassis dynamometer. In order to confirm this approach in Korea, Euro 5(DPF), Euro 6(DPF + LNT), and Euro 6(DPF + SCR) were performed on three different vehicles to determine the exhaust gas characteristics of the random cycle, real-road driving test(PEMS), and emission certification driving mode(NEDC). Six different random cycle driving modes were generated by the vehicle specifications(e.g. curb weight, engine power, gear ratio, and maximum acceleration). The NOx emissions were increased in the NEDC, random cycle, and PEMS order in this study regardless of the test vehicles. The random cycle method has the advantage because it utilizes a chassis dynamometer in the laboratories for a repeatable data collection, and it allows any eminent emission improvement checked prior to a real-road driving test with PEMS.
DME 연료에 첨가제를 혼합하였을 때의 연소 특성 및 배출가스 특성에 관한 연구
권석주(Seokjoo Kwon),차준표(Junepyo Cha),강민구(Mingu Kang),이창식(Chang Sik Lee),박성욱(Sungwook Park),임영관(Young-Kwan Lim) 한국자동차공학회 2012 한국 자동차공학회논문집 Vol.20 No.5
This study describes effects of DME additives on combustion and exhaust emissions characteristics including nano-particle in a single cylinder compression ignition engine. Considered additives include bio-diesel, n-butanol, and MTBE for increasing kinematic viscosity. Among three additives, n-butanol showed the greatest kinematic viscosity. In addition MTBE showed the highest vapor pressure. In the present study mixing ratios of additives were kept constant at 1 and 10% by volume. Experiments were performed at 1200rpm engine speed and nano-particles were measured by SMPS (Scanning mobility particle sizer) devices. Results of combustion characteristics showed that considered additives had little effects on combustion pressure. However, patterns of heat release rate were dependent on properties of additives. Nano-particles of MTBE were the lowest among considered additives.
디젤 엔진에서 디젤-가솔린 Dual fuel이 연소 및 배기 특성에 미치는 영향
권석주(Seokjoo Kwon),차준표(Junepyo Cha),이창식(Chang Sik Lee),박성욱(Sungwook Park) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.41
The purpose of this paper is to investigate the combustion and emission characteristics in compression ignition engines using diesel-gasoline dual fuel. For investigating combustion characteristics, diesel fuel was injected directly in a single-cylinder compression ignition engine with a common-rail injection system and gasoline fuel was injected into premixed chamber installed in intake port. In order to investigate exhaust emission characteristics, exhaust gas was measured by emission analyzer and smoke meter. The experimental results showed that the case of diesel-gasoline dual fuel combustion had longer ignition delay and lower combustion pressure compared to those of directly injected diesel fuel case. Furthermore, premixed gasoline-air mixture reduced NOx emissions due to low peak of rate of heat release (ROHR).
첨가제가 혼합된 DME 연료가 압축착화 엔진의 연소 및 미세입자 배출 특성에 미치는 영향
권석주(Seokjoo Kwon),차준표(Junepyo Cha),강민구(Mingu Kang),이창식(Chang Sik Lee),박성욱(Sungwook Park) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The purpose of this study is to investigate combustion and exhaust characteristics including nano-particles in compression ignition engines fueled with DME. Considered additives of the present study are bio-diesel, butanol, and MTBE. DME fuel was directly injected into the cylinder at 50㎫ injected pressure. 10% mass fractions of additives were blended with DME. Experiments were performed at 1200rpm engine speed and nano-particle was measured by SMPS (Scanning Mobility Particle Sizer) devices. Results of combustion characteristics is showed that considered additives have little effect on combustion pressure. However, patterns of heat release rate were dependent on properties of additives. Nano-particles of MTBE were the lowest among considered additives
중대형 차량 에너지소비효율 측정과 개별 모드주행에 따른 실차 연비영향에 관한 연구
권석주(Seokjoo Kwon),차준표(Junepyo Cha),서동명(Dong Myung Seo),강우(Woo Kang),서영호(Youngho Seo),박성욱(Sungwook Park) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
The purpose of this study is to know the impact of difference driving mode on medium-heavy duty vehicle. Two driving modes (JE05 and WHVC) are tested to understand the difference of energy consumption efficiency and exhaust emissions. Experiment was used the HYUNDAI e-AERO TOWN performed at chassis dynamometer and exhaust emission analysis system for medium-heavy duty vehicles. JE05 mode energy consumption efficiency was reduced about 6% than WHVC mode. Such a conclusion has been shown by difference of average speed and driving mileage.