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SCR 및 LNT가 적용된 Euro-6 소형 경유차의 실제도로 주행과 인증모드에서의 CO<sub>2</sub> 및 NO<sub>x</sub> 배출특성의 비교
이종태 ( Jongtae Lee ),김정수 ( Jeongsoo Kim ),전문수 ( Mun Soo Chon ),차준표 ( Junepyo Cha ) 한국액체미립화학회 2016 한국액체미립화학회지 Vol.21 No.4
Recently, the certification procedure for exhaust emission regulation of LDV has tested with the NEDC mode in the laboratory. But the on-road exhaust emissions exceed the standard emission limits. Therefore, it is important to analyze the realdriving emissions (RDE) with a portable emissions measurement system (PEMS). In present study, the on-road emissions were measured with a PEMS and evaluated by moving averaging window (MAW) method. Also, it was compared with the CO2 and NOx emissions for real-driving and test modes from euro-6 light-duty vehicles equipped with SCR and LNT systems. In results, on-road NO<sub>x</sub> emission has been 2.3-10.0 times higher than the standard NO<sub>x</sub> emission limit on NEDC mode. The reason was that the test modes did not reflect traffic and various real-driving patterns sufficiently.
미립화와 환경 2 : 이륜자동차(EURO-3) 오염물질 및 미량유해물질 배출특성평가
이종태 ( Jongtae Lee ),유흥민 ( Heung-min Yoo ),손지환 ( Jihwan Son ),윤창완 ( Changwan Yun ),박규태 ( Gyu-tae Park ),문선희 ( Sunhee Mun ),김정수 ( Jeongsoo Kim ) 한국액체미립화학회 2015 한국액체미립화학회 학술강연회 논문집 Vol.2015 No.-
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.
주행 경로 및 계절의 변화가 소형 경유차의 실제 주행 시 질소산화물 배출량에 미치는 영향
이태우(Taewoo Lee),김지영(Jiyoung Kim),박준홍(Junhong Park),전상진(Sangzin Jeon),이종태(Jongtae Lee),김정수(Jeongsoo Kim) 한국자동차공학회 2014 한국 자동차공학회논문집 Vol.22 No.1
The objective of this study is to compare NOx emissions from light duty diesel vehicles measured from on-road tests that conducted under various driving routes and seasonal conditions. We measured real-driving NOx emissions using PEMS, portable emissions measurement system, under the urban, rural and motorway road traffic conditions. On-road tests were repeated at summer, fall and winter season. The accumulated driving distance is more than 1,200 km per each vehicle. Route average NOx emission factors were compared among nine route-season combinations. The emission characteristics of each combinations were investigated using time series mass emission rates and vehicle operation-based emission rates and activities, which is based on U.S. EPAs MOVES model. Most concerned route-season combination is “urban road condition at summer”, which shows two to eleven times higher NOx emissions than other combinations. The emission rates and activities under low speed operating conditions should be managed in order to reduce urban-summer NOx. From a NOx control strategy perspective, the exhaust gas recirculation, EGR, is observed to be properly operated under wide range of vehicle driving conditions in Euro-5 vehicles, even if the air conditioner turns on. In high power demanding conditions, the effect of overspeeding could be more critical than that of air conditioner activation.
국내 소형자동차의 실제 도로 주행 배출가스 특성에 관한 연구
박준홍(Junhong Park),이종태(Jongtae Lee),김선문(Sunmoon Kim),김정수(Jeongsoo Kim),안근환(Keunwhan Ahn) 한국자동차공학회 2013 한국 자동차공학회논문집 Vol.21 No.6
Strengthening vehicle emission regulation is one of important policies to improve air quality in urban area. Due to the limitation of specified driving cycles for certification test to reflect real driving conditions, additional off-cycle emission regulations have been adopted in US and being developed in Europe. The driving cycles of US or Europe have been used in emission certification for Korean light-duty vehicles, but it has not been known how well the driving cycles reflect various real driving patterns in Korea. In that point of view, it is required to estimate vehicle emission based on real road driving conditions to raise the effectiveness of vehicle emission regulation in Korea. In this study, real driving emission measurements have been conducted for three Korean light-duty vehicles with PEMS. The driving routes consisted of urban, rural and motorway in Seoul and Incheon. The data have been analyzed with various averaging methods including moving averaging windows method and compared to emission limits set with emission certification modes applied to tested vehicles. The results have shown that the real driving pollutant emissions of a gasoline and a LPG vehicles have been ranged quite lower than those of emission limits on CVS-75 driving cycle. But real driving NOx of a light duty diesel vehicle has been considerably higher than emission limit of NEDC driving cycle. The higher than expected NOx emission of a diesel vehicle might be caused by different strategy to control EGR in real driving condition from NEDC driving.