Journal
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
Volume 234, Issue 6, Pages 1563-1571Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0954407019898959
Keywords
High-altitude; portable emissions measurement system; vehicle specific power; driving cycle; emissions
Funding
- National Key Research and Development Plan [2017YFC0211005-01]
- National Engineering Laboratory for Mobile Source Emission Control Technology [NELMS2017A15]
- National Natural Science Foundation of China [51608221]
- Project of Jiangsu education department [18KJB580002]
- China Scholarship Council
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Vehicle emissions standards and regulations remain weak in high-altitude regions. In this study, vehicle emissions from both the New European Driving Cycle and the Worldwide harmonized Light-duty driving Test Cycle were analyzed by employing on-road test data collected from typical roads in a high-altitude city. On-road measurements were conducted on five light-duty vehicles using a portable emissions measurement system. The certification cycle parameters were synthesized from real-world driving data using the vehicle specific power methodology. The analysis revealed that under real-world driving conditions, all emissions were generally higher than the estimated values for both the New European Driving Cycle and Worldwide harmonized Light-duty driving Test Cycle. Concerning emissions standards, more CO, NOx, and hydrocarbons were emitted by China 3 vehicles than by China 4 vehicles, whereas the CO2 emissions exhibited interesting trends with vehicle displacement and emissions standards. These results have potential implications for policymakers in regard to vehicle emissions management and control strategies aimed at emissions reduction, fleet inspection, and maintenance programs.
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