Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Characteristics of Real-road Driving NOx Emissions from Korean Light-duty Vehicles regarding Driving Routes

주행경로에 따른 국내 소형자동차 실제도로 주행 질소산화물 배출량 특성

  • Oak, Seonil (Department of Energy System Engineering, Korea National University of Transportation) ;
  • Eom, Myoungdo (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Lee, Jongtae (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Park, Junhong (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Kim, Jichul (Department of Energy System Engineering, Korea National University of Transportation) ;
  • Chon, Mun Soo (Department of Energy System Engineering, Korea National University of Transportation)
  • 옥선일 (한국교통대학교 에너지시스템공학과) ;
  • 엄명도 (국립환경과학원 교통환경연구소) ;
  • 이종태 (국립환경과학원 교통환경연구소) ;
  • 박준홍 (국립환경과학원 교통환경연구소) ;
  • 김지철 (한국교통대학교 에너지시스템공학과) ;
  • 전문수 (한국교통대학교 에너지시스템공학과)
  • Received : 2014.09.26
  • Accepted : 2014.10.15
  • Published : 2015.01.01
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Abstract

Despite of recently strengthened vehicle emission regulations, NOx emissions are not decreased in urban areas because of discrepancies between certification emission test modes and real driving conditions. Thus, researches on RDE-LDV (Real-driving Emission-Light-duty Vehicle) have been conducted actively using PEMS (Portable Emissions Measurement Systems). In the present study, NOx emissions were measured for 5 Korean light duty vehicles for real driving conditions including city, combined, highway, and up-downhill test route. Emission characteristics were analyzed for averaged NOx emissions per unit driving distance of each driving test routes. Furthermore, MAW (Moving Average Window) method based on $CO_2$ emissions from WLTC, which will be supported for EU regulations, was utilized. It was revealed that DRs (deviation ratios) for diesel vehicles (i.e., 5.1 ~ 8.4) were greater than gasoline vehicles (less than 0.15). Especially DR of diesel vehicle for up-downhill test route was 8.4, which indicates severe NOx emissions.

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References

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