摘要
为对比南京市市区轻型车实际行驶工况与标准工况(含检测工况)在工况特征和排放特性上的差异水平,以南京市轻型汽油车为对象,采用车载测试系统和底盘测功机对各种工况进行排放测试。标准工况的CO2、CO和HC的平均排放速率是实际工况下的1.2～2.4倍,实际行驶工况下对应的污染物排放速率是标准工况下的1.1～2.2倍。由于实际道路运行条件下的车辆频繁加减速,导致实际工况的NOx排放速率高于标准工况的NOx排放速率(达到1.3倍)。结果显示,检测工况可以合理反映出实际道路下的匀速和怠速排放情况,但检测工况下的排放速率较低。标准工况仅能反映出污染物的基本排放规律,不能较好地表达实际工况车辆频繁加速、减速导致的污染物排放差异。
To compare the difference between the real-world driving cycle and standard driving cycle (including a test cycle), light-duty gasoline vehicles were tested on urban roads in Nanjing using a portable emission measurement system and chassis dynamometer. The pollutant emission rates of CO2, CO, and HC under the standard driving cycle were observed to be 1.2 to 2.4 times the corresponding rates under the constructed driving cycle. Emission rates of CO2, CO, and HC under the constructed driving cycle were observed to be 1.1 to 2.2 times these rates under the test driving cycle. The results show that the current test driving cycle can be adopted to predict the pollutant emission under conditions of cruising and idle;however, the values are lower than actual. The frequent acceleration and deceleration under the real-world driving conditions cannot be represented in totality by the new European driving cycle.
作者
陈许冬
李铁柱
胡鸿飞
CHEN Xu-dong;LI Tie-zhu;HU Hong-fei(School of Transportation,Southeast University,Nanjing 210096,China)
出处
《交通运输工程与信息学报》
2019年第1期101-109,共9页
Journal of Transportation Engineering and Information
基金
国家自然科学基金(51008155)
江苏省普通高校研究生科研创新计划(CXLX_0138)
关键词
轻型车
行驶工况
车载系统
标准工况
底盘测功机
light-duty vehicle
driving cycle
portable emission measurement system(PEMS)
standard driving cycle
chassis dynamometer
