Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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A Study on Exhaust Emission Characteristics of Medium-Duty Trucks according to Emission Standards and Driving Modes

배출허용기준 및 주행모드에 따른 중형화물차의 대기오염물질 배출특성

  • 정택호 (국립환경과학원 교통환경연구소) ;
  • 김선문 (국립환경과학원 교통환경연구소) ;
  • 이종철 (국립환경과학원 교통환경연구소) ;
  • 임윤성 (국립환경과학원 교통환경연구소) ;
  • 김인구 (국립환경과학원 교통환경연구소) ;
  • 이종태 (국립환경과학원 교통환경연구소) ;
  • 김형준 (국립환경과학원 교통환경연구소)
  • Received : 2020.02.24
  • Accepted : 2020.03.07
  • Published : 2020.03.30
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Abstract

NOx, PN and CO emissions from diesel trucks make up a significant portion of domestic air pollutant emissions. Therefore, test vehicles with various emission standards and driving modes were selected to evaluate the emission characteristics of regulated pollutants (NOx, PN, CO) in medium-duty trucks. As a result of test, all test vehicles were satisfied with Euro 5 or 6 regulation. NOx emissions of Euro 6 vehicles with after-treatment of LNT + DPF were lower than those of Euro 5 vehicles with DPF. In WLTC mode, all vehicles have high NOx emissions at section of extra high speeds, which are determined by increased fuel consumption and high combustion temperatures. CO and PN emissions from all vehicles were found to be low at section of low speeds. Also, The NO2/NOx ratio was analyzed at 7-23% in each mode, and the NO2/NOx ratio increased as the average vehicle speed increased. In NIER 9 mode, the CO, HC, and PN emissions were higher under cold conditions of engine than hot conditions of engine. In addition, vehicles with after-treatment system of LNT have similar NOx emissions level in this study.

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References

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