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On-Road Emissions and Fuel Consumption Testing of Heavy-Duty Vehicles via PEMS - Comparisons of Various Performance Metrics
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 29, 2022 by SAE International in United States
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For over a decade, the EU has required in-service conformity testing of heavy-duty road vehicles. This paper briefly discusses the practical aspects of the test requirements, how they have evolved and how they compare to other precedents, such as the heavy-duty engine dynamometer-based type approval testing procedure, as well as broadly equivalent EU requirements for light duty vehicles. Emissions requirements for heavy-duty vehicles are work-specific, but based on standard test results a range of other parameters can be calculated to yield distance-specific, tonnage-distance specific, CO2-specific and (gravimetric) fuel-specific results. At present, CO2 and fuel consumption are not subject to any limits per se during on-road testing (and this is the case for both heavy and light duty vehicles); nevertheless, the aforementioned parameters must be measured and such results can be of interest for a variety of reasons. Insightful results in the form of fuel-specific emissions of pollutants, as well as work-specific fuel/energy consumption and the resulting empirical efficiency coefficient can all be calculated based on the standard result set commonly recorded during such testing. In this study, the factors mentioned above are introduced and discussed and sample test results are analyzed. The test results were obtained by carrying out the aforementioned EU test procedures on several heavy-duty vehicles with varying payloads (and with various powertrains, using Diesel or CNG fuel). The aforementioned metrics are used to characterize and normalize the results and compare them to various precedents. Comparisons are made with the case of light duty vehicles, their laboratory and on-road test procedures and the emissions limits they are subject to according to EU requirements.
CitationBielaczyc, P. and Woodburn, J., "On-Road Emissions and Fuel Consumption Testing of Heavy-Duty Vehicles via PEMS - Comparisons of Various Performance Metrics," SAE Technical Paper 2022-01-0571, 2022, https://doi.org/10.4271/2022-01-0571.
- Bielaczyc , P. and Woodburn , J. Trends in Automotive Emission Legislation: Impact on LD Engine Development, Fuels, Lubricants and Test Methods: A Global View, With a Focus on WLTP and RDE Regulations Emission Control Science and Technology 5 1 2019 86 98 https://doi.org/10.1007/s40825-019-0112-3
- Fontaras , G. , Rexeis , M. , Dilara , P. , Hausberger , S. et al. The Development of a Simulation Tool for Monitoring Heavy-Duty Vehicle CO2 Emissions and Fuel Consumption in Europe SAE Technical Paper 2013-24-0150 2013 https://doi.org/10.4271/2013-24-015
- Bonnel , P. , Kubelt , J. , Provenza , A. 2011 http://dx.doi.org/10.2788/54662
- Pajdowski , P. , Woodburn , J. , Bielaczyc , P. , and Puchalka , B. Development of RDE Test Methodology in Light of Euro 6d Emissions Limits Combustion Engines 178 3 2019 274 282 https://doi.org/10.19206/CE-2019-348
- Perujo , A. , Bonnel , P. , Mendoza Villafuerte , P. PEMS Based In-Service Testing: Practical Recommendations for Heavy-Duty Engines/Vehicles JRC Report JRC95958 2015 http://dx.doi.org/10.2790/442422