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경유자동차의 인증시험 모드 외 질소산화물 배출 특성에 관한 연구
이종태 ( Jong-tae Lee ),박준홍 ( Junhong Park ),윤창완 ( Chang-wan Yun ),강건우 ( Gunwoo Kang ),이상현 ( Jeong-soo Kim ),김정수 한국액체미립화학회 2016 한국액체미립화학회 학술강연회 논문집 Vol.2016 No.-
Emission regulations for diesel vehicles have been dramatically strengthened to reduce air pollutions of urban area. Korea has introduced European strict regulations to light-duty diesel vehicles which Euro6 emission limit was enforced from 2014. Recent studies of on-road NOx emissions have shown that considerable NOx discrepancies exist in driving certification test cycle and on-road. It is regarded as a reason of ineffectiveness of strict vehicle emission regulations on reducing air pollutants such as NO<sub>2</sub>. In this study 20 Euro6 vehicles have been tested in various driving conditions on chassis dynamometer beside conventional certification driving cycle, NEDC. The results have shown very large range of NOx emission values as tested vehicles and engine calibration rather than emission reduction technologies impacted on increased NOx emissions. When vehicles were driven in high ambient temperature with operating air conditioner and in low ambient temperature, reduced EGR function caused excessive NOx emissions. A vehicle emitted high NOx emission in slightly different driving conditions caused by shut-off EGR and was considered to use defeat device.
이중 분사 적용에 따른 단기통 디젤엔진의 연소특성에 관한 연구
이종태(Jong-Tae Lee),신달호(Dalho Shin),김형준(Hyung Jun Kim),윤창완(Chang-Wan Yun),김정수(Jeong-Soo Kim),박수한(Suhan Park) 한국연소학회 2017 한국연소학회지 Vol.22 No.1
This paper presents an experimental study on the effect of double injection strategies on combustion characteristics in a single-cylinder diesel engine. These studies are applied to the double injection strategies, such as 2<SUP>nd</SUP> injection timing variations with fixed injection interval (8 degree) and variations of injection pressures with fixed injection timing and intervals. The injection quantity was 7 + 7 ㎎ for double injections, and 14 ㎎ for single injection. When the injection pressure was increased, the ignition delay was shortened, and the ISFC (indicated specific fuel consumption) was increased due to the fast termination of combustion by the shortened energizing duration. In addition, the retardation of injection timings toward TDC (top dead center) caused the reduction of ignition delay and the decrease of ISFC with the decrease of FMEP (friction mean effective pressure).
이종태 ( Jong Tae Lee ),김기준 ( Ki Joon Kim ),김정수 ( Jeong Soo Kim ),윤창완 ( Chang Wan Yun ),장지환 ( Ji Hwan Jang ),박성욱 ( Sung Wook Park ) 한국액체미립화학회 2014 한국액체미립화학회 학술강연회 논문집 Vol.2014 No.-
In this study, PM and PN emission characteristics of GDI vehicles were compared to MPI vehicles using the Condensation Particle Counter (CPC) measurement equipment. In addition, driving modes were divided into normal driving mode (CVS-75, NEDC, NIER 6, NIER 9) and a constant speed driving mode (10km/h, 35km/h, 80km/h, 110km/h) to evaluate the characteristics in the various operating conditions. In the results, most of the driving mode, PM and PN from GDI vehicle were higher than those of MPI vehicle. However, in the constant speed modes of 110km/h, PM and PN from MPI vehicle were as high as those of GDI vehicles. It is believed that less accurate fuel injection of the MPI vehicle causes higher PM and PN emissions at high velocity.
이종태 ( Jong Tae Lee ),유흥민 ( Heung Min Yoo ),손지환 ( Ji Hwan Son ),윤창완 ( Chang Wan Yun ),문선희 ( Sun Hee Mun ),박규태 ( Gyu Tae Park ),김정수 ( Jeong Soo Kim ) 한국분무공학회 2015 한국액체미립화학회지 Vol.20 No.1
Recently, some researchers have been carried out risk assessment of vehicles exhaust on human health. Especially, some of VOCs which is non-controlled, was classified to hazardous pollutant, such as 1,3-Butadiene and BTEX(Benzene, Toluene, Ethylbenzene and Xylene). Therefore, the profile on non-controlled pollutant may be needed in the future, because it would be critical data or information to control them. Additionally, with increasing amount of motorcycle, the source profiling is essential for estimating emission factor and amount on motorcycle exhaust. For these, in this study, imported motorcycles (8 vehicles) were selected as a test model while considering the increasing ratio on sales volume between 2013 and 2014; it was also compared with domestic motorcycles on those. The experiment was conducted by driving mode, UDC and ECE+EUDC that made from EURO III. In addition, it was performed at cold start driving mode without effect by displace- ment, for evaluating only correlation of BTEX with HC. In order to apply the ratio (m,p-Xylene/o-Xylene) as a marker, the ratio was compared with those of tunnel, road side and residential area. As a result, it showed best correlation (R2=0.98) among those. In the future, it has to be considered as a marker for effect evaluation to atmospheric environment by exhaust emission.
단 실린더 디젤기관에서 연료 내 극 미세기포 혼합에 따른 기관성능에 및 배출가스 특성에 관한 실험적 연구
이종철 ( Jong-chul Lee ),이종태 ( Jong-tae Lee ),윤창완 ( Chang-wan Yun ),김정수 ( Jeong-soo Kim ),박기영 ( Gi-young Park ),이성욱 ( Seang-wock Lee ) 한국액체미립화학회 2016 한국액체미립화학회 학술강연회 논문집 Vol.2016 No.-
Nowadays, globally air pollution is getting worse and worse and becomes a serious problem. Therefore, high fuel efficiency and low emission vehicle was developed due to the depletion of petroleum resources and solving the environmental pollution in the automotive industry. The purpose of this study is to reduce CO2 emissions and improve fuel economy by supplying fuel including microbubbles in compression ignition (CI) engine. Through a combustion analyzer, combustion visualization and an exhaust gas analyzer, the combustion and emission characteristics of microbubble fuel were showed with various conditions of engine speed and load using a single cylinder engine. In the test result, fuel consumption was decreased 1.4~4.5% with bubbled fuel in the same condition. Also, NOx was slightly decreased due to lower combustion temperature in the cylinder based on decreased ignition delay. The knowledge from this experiment will facilitate the application a new diesel fuel of low specific fuel consumption and for the strict CO2 emissions regulation in internal combustion engines.
휘발유 승용자동차의 엔진 배기량이 실도로 주행시 이산화탄소 및 질소산화물 배출에 미치는 영향
이종태 ( Jongtae Lee ),김형준 ( Hyung Jun Kim ),임윤성 ( Yun Sung Lim ),윤창완 ( Chang Wan Yun ),길지훈 ( Ji Hoon Keel ),홍유덕 ( You Deug Hong ) 한국액체미립화학회 2018 한국액체미립화학회지 Vol.23 No.3
Recently, registrated passenger cars have increased and were close about seventy million at the end 2017 year in Korea. Among the passenger car using gasoline fuel make up forty six percentage of total registrated vehicles. In this study, investigation on real driving emission characteristics in the passenger car using gasoline fuel with various engine displacements were carried out. The real driving emission characteristics were measured and analyzed by using PEMS (Portable Emission Measurement System). PEMS was composed of gas analyzer, emission flow meter and sample conditioning system et al. Also, test six vehicles were selected to the gasoline passenger car with engine displacement from 1.6L to 3.7L. Two test routes with engine start of cold and hot conditions were applied to analyze the emission characteristics of RDE, respectively. The results show that the CO<sub>2</sub> emission have a increasing trend as the engine displacement and vehicle weight. Also, it is guessed that the CO<sub>2</sub> emission and vehicle weight were more correlated than the engine displacements. On the other hand, NOx emissions of RDE have not increasing or decreasing tendency according engine displacements or vehicle weight because the activation of three-way catalyst in the gasoline vehicles.
박규태 ( Gyu Tae Park ),김기준 ( Ki Joon Kim ),이종태 ( Jong Tae Lee ),문선희 ( Sun Hee Mun ),윤현진 ( Hyun Jin Yun ),윤창완 ( Chang Wan Yoon ),김정수 ( Jeong Soo Kim ) 한국액체미립화학회 2014 한국액체미립화학회 학술강연회 논문집 Vol.2014 No.-
The PAHs (polycyclic aromatic hydrocarbons) emitted from diesel vehicles are well known to have carcinogenic to humans. The particulate and gaseous PAHs are emitted from diesel vehicles. In this study, the characteristics of particulate PAHs emitted from medium duty trucks were studied. The medium duty trucks (EURO 4 and EURO 5) were tested by heavy-duty chassis dynamometer system with NIER driving cycle mode. The particulate PAHs were collected by fiberglass filter and determined by a GC/MS (gas chromatograph/mass spectrometer). The PAHs such as acenaphthylene, fluorene, phenanthrene were mainly exhausted from EURO 4 and EURO 5 trucks.
EURO 3에 의한 이륜자동차의 미량유해물질 배출특성평가
유흥민 ( Heung Min Yoo ),손지환 ( Ji Hwan Son ),박규태 ( Gyu Tae Park ),문선희 ( Sun Hee Mun ),윤창완 ( Chang Wan Yun ),김정수 ( Jeong Soo Kim ),이종태 ( Jong Tae Lee ) 한국분무공학회 2015 한국액체미립화학회지 Vol.20 No.4
Recently, the researches for air pollutant control technologies have been performing in Korea, while considering an one of the latest main topics as problems on air pollutant control. However, it is difficult to investigate emission amount of air pollutant by passenger cars, because of lack of the domestic information about mobile source; the number of research institutes are less in the whole. Especially, the informations on registered numbers and emissions of motorcycles are less. Thus, in this study, the analysis that is based on experimental results was conducted for finding out source profiling and emission characteristics on motorcycles exhaust. For these experiments, the domestic motorcycles were chosen and evaluated by EURO III standard. From the result, controlled pollutants (CO, HC, NOx) were met to EURO III, but low displacement motorcycles showed a higher incomplete combustion reaction than that of 250 cc motorcycles. Additionally, uncontrolled pollutants (BTEX and 1,3-butadiene) were decreased with increasing a displacement of motorcycles. However, the emission trend of aldehydes was not followed that of those; the formaldehyde ratio increased upto approximately 33%, with increasing a displacement of motorcycles. In the future, it would be used to support the CAPSS as basic data of Korea.