基于工况分布与测试的轻型车实际道路排放因子的求取

天津科技 ›› 2023, Vol. 50 ›› Issue (4): 51-57.

基于工况分布与测试的轻型车实际道路排放因子的求取

罗佳鑫¹, 温溢¹, 李贺², 赵笑春²

1.中汽研汽车检验中心（天津）有限公司天津 300300;
2.北京奔驰汽车有限公司北京 100176

收稿日期:2023-04-07 出版日期:2023-04-25 发布日期:2023-12-27

Calculation of Real Driving Emission Factors of Light-duty Vehicles Based on Distribution of Driving Conditions

LUO Jiaxin¹, WEN Yi¹, LI He², ZHAO Xiaochun²

1. CATARC Automotive Test Center <Tianjin> Co.,Ltd.,Tianjin 300300,China;
2. Beijing Benz Automotive Co.,Ltd.,Beijing 100176,China

Received:2023-04-07 Online:2023-04-25 Published:2023-12-27

摘要/Abstract

摘要： 基于27辆不同排放阶段的轻型汽油车实际道路排放试验结果,通过划分冷启动过程与热运行过程,结合中国工况中的VSP Bin区间分布,计算了轻型车实际道路排放因子。结果表明：随着排放标准的趋严,轻型车实际道路的CO与NO_x排放呈现明显的下降趋势,同时PN排放在国Ⅵ阶段迅速下降;热运行过程中,在VSP较高的Bin 25与Bin 37内,CO、NO_x与PN排放均较高;国Ⅵ轻型车CO、NO_x与PN热运行加权排放因子分别为0.133 g/km、0.019 g/km、2.67×10¹¹个/km;结合北京市机动车使用场景,计算表明国Ⅵ轻型车单日CO、NO_x与PN排放量最高可达12.47 g、1.47 g、2.60×10¹³个/km;通过不同环境温度WLTC工况试验,得到了环境温度对污染物排放的影响系数,并加权计算了不同环境温度下的排放因子。

关键词: 中国工况, 实际道路排放, 轻型汽油车, 环境温度

Abstract: Based on the real driving emission test results of 27 light gasoline vehicles meeting different emission stages,the real driving emission factors of light vehicles are calculated by dividing the cold start process and hot running process,combined with the VSP Bin interval distribution in CLTC cycle. The results show that with the tightening of emission standards,the CO and NO_x emissions of light vehicles show an obvious downward trend,and the PN emission decreases rapidly in the China VI stage. During hot running,the emissions of CO,NO_x and PN are higher in Bin 25 and Bin 37 with higher VSP. The hot running weighted emission factors of CO,NO_x and PN of China VI light vehicles are 0.133g/km,0.019g/km and 2.67×10¹¹/km respectively. According to the calculation of vehicle usage scenarios in Beijing,the daily emissions of CO,NO_x and PN of China VI light vehicles can reach 12.47g,1.47g and 2.60×10¹³/km respectively. Through the WLTC test of different ambient temperatures,the influence factors of ambient temperature on pollutant emission are obtained,and the emission factors under different ambient temperatures are calculated.

Key words: CLTC, real driving emission, light-duty gasoline vehicles, ambient temperature

中图分类号:

X734.2

罗佳鑫, 温溢, 李贺, 赵笑春. 基于工况分布与测试的轻型车实际道路排放因子的求取[J]. 天津科技, 2023, 50(4): 51-57.

LUO Jiaxin, WEN Yi, LI He, ZHAO Xiaochun. Calculation of Real Driving Emission Factors of Light-duty Vehicles Based on Distribution of Driving Conditions[J]. TIANJIN SCIENCE & TECHNOLOGY, 2023, 50(4): 51-57.