基于动力学参数的国Ⅵ重型天然气车实际道路排放特性研究  

Study on Real Road Emission Characteristics of National Ⅵ Heavy Natural Gas Vehicle Based on Dynamic Parameters

作　　者：王志红[1,2] 黄钰焜 张远军[3] 丁玲 王志军 Wang Zhihong;Huang Yukun;Zhang Yuanjun;Ding Ling;Wang Zhijun(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan Universityof Technology,Wuhan 430070,China;National Automotile Quality Supervision and Test Center(Xiangyang),Xiangyang441004,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [2]武汉理工大学汽车零部件技术湖北省协同创新中心,湖北武汉430070 [3]国家汽车质量监督检验中心(襄阳),湖北襄阳441004

出　　处：《华东交通大学学报》2022年第4期32-40,共9页Journal of East China Jiaotong University

基　　金：高等学校学科创新引智计划(B17034);教育部创新团队发展计划(IRT_17R83)。

摘　　要：为研究国Ⅵ重型天然气车道路排放特性,采用便携式排放测试系统(PEMS),对国Ⅵ天然气重型半挂牵引车进行实际道路排放试验,分析了污染物排放因子与车辆行驶参数之间的关系。结果表明,市区由于驾驶工况较差,频繁加减速,两个动力学参数最高,市郊高速路段行驶工况较好,动力学参数较低,CO,CO_(2),NO_(x),THC排放因子市区排放最高,市郊最低,与动力学参数正相关;随着车速的升高,污染物排放逐渐下降,且在中低速时下降迅速,车速从0~10 km/h升高到10~20 km/h,CO,CO_(2),NO_(x),THC排放因子分别下降了25%,69%,43%,60%;随着加速度的增加,污染物排放逐渐降低,并且在低速高加速度状态下(v≤30km/h,a≥0.8 m/s^(2))汽车污染物排放最高,建议驾驶员在驾驶该类型车辆时应尽量避免低速高加速状态行驶,以减少车辆排放;污染物排放因子和排放率与比功率VSP呈现良好的正相关性,作为车速加速度及道路等级的函数,VSP可以很好的量化国Ⅵ重型天然气车的排放,从而模拟出不同驾驶条件下的汽车排放特性。In order to study the road emission characteristics of national Ⅵ natural gas heavy-duty vehicle, the portable emission test system(PEMS) was used to carry out the actual road emission test of national Ⅵ natural gas heavy-duty semi-trailer tractor, and the relationship between pollutant emission factors and vehicle driving parameters was analyzed. The results show that due to the poor driving conditions in the urban area and frequent acceleration and deceleration, the two dynamic parameters are the highest. The driving conditions of the suburban expressway section are better, and the dynamic parameters are low.and the emission factors of CO, CO_(2), NO_(x) and THC are the highest in the urban area and the lowest in the suburbs, which are positively correlated with the dynamic parameters. With the increase of vehicle speed, pollutant emissions gradually decreased, and the decline was relatively rapid at low and medium speeds. As the vehicle speed increased from 0~10 km/h to 10~20 km/h,and the emission factors of CO, CO_(2), NO_(x), and THC decreased by 25%, 69%, 43%, and 60% respectively;With the increase of acceleration, the pollutant emission gradually decreased, the emission factors are highest in the low-speed and high-acceleration range(v≤30 km/h, a≥0.8 m/s^(2)). It is recommended that the driver should avoid driving at low speed and high acceleration when driving this type of vehicle to reduce vehicle emissions.At the same time, the emission rates as well as the emission factors exhibited a strong positive correlation with the vehicle specific power(VSP). As a function of vehicle speed acceleration and road grade, VSP can quantify the emissions of China Ⅵ natural gas heavy vehicles, and thus model bus emission under the different driving conditions.

关 键 词：污染物排放 PEMS 重型天然气车 动力学参数 VSP 

分 类 号：U461[机械工程—车辆工程]