Real-road NO x and CO 2 emissions of city and highway China-6 heavy-duty diesel vehicles

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) techno...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2025-03, Vol.149, p.330
Main Authors: Ge, Zihao, Li, Wanyang, Wang, Junfang, Wang, Yachao, Huang, Ying, Wang, Xin, Ge, Yunshan
Format: Article
Language:English
Subjects:
Air Pollutants - analysis
Air Pollution - analysis
Air Pollution - statistics & numerical data
Carbon Dioxide - analysis
China
Cities
Environmental Monitoring - methods
Gasoline - analysis
Nitrogen Oxides - analysis
Vehicle Emissions - analysis
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Summary: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 and CO emissions of China-6 heavy-duty vehicles have been examined. The results showed that city heavy-duty vehicles had higher NO emission levels, which was mostly due to longer time of low SCR temperatures below 180°C. The application of novel methods based on 3B-MAW also found that heavy-duty diesel vehicles tended to have high NO emissions at idle. Also, little difference had been found in work-based CO emissions, and this may be due to no major difference were found in occupancies of hot running.
ISSN:1001-0742