Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study on the Emission Characteristics of Korean Light-duty Vehicles in Real-road Driving Conditions

국내 소형자동차의 실제 도로 주행 배출가스 특성에 관한 연구

  • Park, Junhong (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Lee, Jongtae (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Kim, Sunmoon (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Kim, Jeongsoo (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Ahn, Keunwhan (Transportation Pollution Research Center, National Institute of Environmental Research)
  • 박준홍 (국립환경과학원 교통환경연구소) ;
  • 이종태 (국립환경과학원 교통환경연구소) ;
  • 김선문 (국립환경과학원 교통환경연구소) ;
  • 김정수 (국립환경과학원 교통환경연구소) ;
  • 안근환 (국립환경과학원 교통환경연구소)
  • Received : 2013.03.26
  • Accepted : 2013.04.26
  • Published : 2013.11.01
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Abstract

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.

Keywords

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