Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Evaluations for Representativeness of Light-Duty Diesel Vehicles' Fuel-based Emission Factors on Vehicle Operating Conditions

연료 소비량에 기반한 소형 경유차 대기오염물질 배출계수의 운전조건별 대표성 평가

  • Lee, Taewoo (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Kwon, Sangil (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Son, Jihwan (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Kim, Jiyoung (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Jeon, Sangzin (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Kim, Jeongsoo (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Choi, Kwangho (Department of General Education, Nam Seoul University)
  • 이태우 (국립환경과학원 교통환경연구소) ;
  • 권상일 (국립환경과학원 교통환경연구소) ;
  • 손지환 (국립환경과학원 교통환경연구소) ;
  • 김지영 (국립환경과학원 교통환경연구소) ;
  • 전상진 (국립환경과학원 교통환경연구소) ;
  • 김정수 (국립환경과학원 교통환경연구소) ;
  • 최광호 (남서울대학교 교양과정부)
  • Received : 2013.06.12
  • Accepted : 2013.09.14
  • Published : 2013.12.31
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Abstract

The purpose of this study is to evaluate representativeness of fuel-based emission factors. Twelve light-duty diesel vehicles which meet Euro-3 to 5 legislative emission limits were selected for emission tests. Second-by-second modal emission rates of vehicles were measured on a standard laboratory chassis dynamometer system. An off-cycle driving cycle was developed as a representative Korean real-world on-road driving cycle. Fuel-based emission factors were developed for short trip segments that involved in the selected driving cycle. Each segment was defined to have unit travel distance, which is 1 km, and characterized by its average speed and Relative Positive Acceleration (RPA). Fuel-based $NO_x$ emission factors demonstrate relatively good representativeness in terms of vehicle operation conditions. $NO_x$ emission factors are estimated to be within ${\pm}20%$ of area-wide emission factor under more than 40% of total driving situations. This result implies that the fuel-based $NO_x$ emission factor could be practically implemented into the on-road emission management strategies, such as a remote sensing device (RSD). High emitting vehicles as well as high emitting operating conditions heavily affect on the mean values and distributions of CO and THC emission factors. Few high emitting conditions are pulling up the mean value and biasing the distributions, which weaken representativeness of fuel-based CO and THC emission factors.

Keywords

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