Regulated emission characteristics of in-use LNG and diesel semi-trailer towing vehicles under real driving conditions using PEMS

作     者：Liqun Lv Yunshan Ge Zhe Ji Jianwei Tan Xin Wang Lijun Hao Zhiwei Wang Mengzhu Zhang Chunjie Wang Haidan Liu Liqun Lu;Yunshan Ge;Zhe Ji;Jianwei Tan;Xin Wang;Lijun Hao;Zhiwei Wang;Mengzhu Zhang;Chunjie Wang;Haidan Liu

作者机构：National Laboratory of Auto Performance&Emission TestSchool of Mechanical EngineeringBeijing Institute of TechnologyBeijing 100081China Vehicle Emission Control CenterChinese Research Academy of Environmental SciencesBeijing 100081China Tangshan Environmental Monitoring CentreTangshan 063000China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2020年第32卷第2期

页      面：155-164页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Key Research and Development Program of China(No.2016YFC0208005) the Open Research Program of State Key Laboratory of Engine Combustion(No.K2018-11) 

主　　题：Semi-trailer towing vehicles Regulated emission PEMS 

摘      要：On-road driving emissions of six liquefied natural gas(LNG) and diesel semi-trailer towing vehicles(STTVs) which met China Emission Standard IV and V were tested using Portable Emission Measurement System(PEMS) in northern *** characteristics of these vehicles under real driving conditions were analyzed and proved that on-road emissions of heavy-duty vehicles(HDVs) were underestimated in the *** were large differences among LNG and diesel vehicles, which also existed between China V vehicles and China IV *** factors showed the highest level under real driving conditions, which probably be caused by frequent acceleration, deceleration, and *** emission factors ranged from 2.855 to 20.939 g/km based on distance-traveled and 6.719–90.557 g/kg based on fuel consumption during whole tests, which were much higher than previous researches on chassis *** was inferred from tests that the fuel consumption rate of the test vehicles had a strong correlation with NOx emission, and the exhaust temperature also affected the efficiency of Selected Catalytic Reduction(SCR) aftertreatment system, thus changing the NOx emission *** emission factors of LNG vehicles were 2.012–10.636 g/km, which were much higher than that of diesel vehicles(0.029–0.185 g/km).Unburned CH4 may be an important reason for this *** on-road emission tests, especially CH4 emission test should be carried out in subsequent *** addition, the Particulate Number(PN) emission factors of diesel vehicles were at a very high level during whole tests, and Diesel Particulate Filter(DPF)should be installed to reduce PN emission.