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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.
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이동구간평균법을 이용한 소형화물트럭의 도로 주행 배출가스 평가
박준홍(Junhong Park),김정수(Jeongsoo Kim),이종태(Jongtae Lee),김선문(Sunmoon Kim),안근환(Keunwhan Ahn),한보영(Boyoung Han) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Vehicle emission test with conventional driving cycle and equipment could provide data with good representation and repeatability. But the laboratory test has limit to reflect various real driving patterns and conditions. With the improvement of PEMS, real driving emission regulation has been set up for heavy duty vehicles. European Commission is studying the feasibility that the PEMS could be applied to light duty vehicles. The real driving emission is varied as much as driving parameters and conditions. The moving averaging window method has been introduced to EURO-6 PEMS regulation for heavy duty vehicles. In principle the method could be applied to light duty vehicles. The real road emissions of a diesel fuelled light duty truck have been analyzed with CO₂ based moving averaging windows method. The result show that NOx emission is deviated considerably from emission standard due to the uncontrolled EGR in highway driving.
ScienceON
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