Real-road NO_(x)and CO_(2)emissions of city and highway China-6 heavy-duty diesel vehicles  

作　　者：Zihao Ge Wanyang Li Junfang Wang Yachao Wang Ying Huang Xin Wang Yunshan Ge 

机构地区：[1]School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Weichai Power Co.Ltd.,Weifang 261061,China [3]Chinese Research Academy of Environmental Sciences,Beijing 100012,China

出　　处：《Journal of Environmental Sciences》2025年第3期330-341,共12页环境科学学报(英文版)

基　　金：supported by the National Key Research and Development Project of China(No.2022YFC3701802);the National Natural Science Foundation of China(No.52272342);the Major Science and Technology Projects of Qinghai Province(No.2019-GX-A6).

摘　　要：The emission of heavy-duty vehicles has raised great concerns worldwide.The complex working and loading conditions,which may differ a lot from PEMS tests,raised new challenges to the supervision and control of emissions,especially during real-world applications.On-board diagnostics(OBD)technology with data exchange enabled and strengthened the monitoring of emissions from a large number of heavy-duty diesel vehicles.This paper presents an analysis of the OBD data collected from more than 800 city and highway heavy-duty vehicles in China using remote OBD data terminals.Real-world NO_(x)and CO_(2)emissions of China-6 heavy-duty vehicles have been examined.The results showed that city heavy-duty vehicles had higher NO_(x)emission levels,which was mostly due to longer time of low SCR temperatures below 180°C.The application of novel methods based on 3BMAWalso found that heavy-duty diesel vehicles tended to have high NO_(x)emissions at idle.Also,little difference had been found in work-based CO_(2)emissions,and this may be due to no major difference were found in occupancies of hot running.

关 键 词：Remote monitor On-Board diagnostics NO_(x)emission CO_(2)emission Heavy-duty vehicles 

分 类 号：X734.2[环境科学与工程—环境工程]