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Heavy-Duty Aerodynamic Testing for CO2 Certification: A Methodology Comparison
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 2, 2019 by SAE International in United States
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Aerodynamic drag testing is a key component of the CO2 certification schemes for heavy-duty vehicles around the world. This paper presents and compares the regulatory approaches for measuring the drag coefficient of heavy-duty vehicles in Europe, which uses a constant-speed test, and in the United States and Canada, which use a coastdown test. Two European trucks and one North American truck were tested using the constant-speed and coastdown methods. When corrected to zero yaw angle, a difference of up to 12% was observed in the measured drag coefficients from the US coastdown procedure and the EU constant-speed test. The differences in the measured drag coefficient can be attributed, among others, to the assumptions in the speed-dependence of the tire rolling resistance and axle spin losses, the data post-processing required by each methodology, unaccounted frictional losses in the transmission, the behavior of the automated manual transmission during the coastdown run, and the yaw angle correction.
- J. Felipe Rodriguez - Intl. Council on Clean Transportation
- Oscar Delgado - Intl. Council on Clean Transportation
- Berk Demirgok - West Virginia University
- Cem Baki - West Virginia University
- Marc Besch - West Virginia University
- Arvind Thiruvengadam - West Virginia University
- Martin Rexeis - University of Technology Graz
- Martin Röck - University of Technology Graz
CitationRodriguez, J., Delgado, O., Demirgok, B., Baki, C. et al., "Heavy-Duty Aerodynamic Testing for CO2 Certification: A Methodology Comparison," SAE Technical Paper 2019-01-0649, 2019, https://doi.org/10.4271/2019-01-0649.
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- Rodríguez, F., “Certification of CO2 Emissions and Fuel Consumption of On-Road Heavy-Duty Vehicles in the European Union,” International Council on Clean Transportation, Policy update, Feb. 2018, https://www.theicct.org/publications/certification-co2-emissions-and-fuel-consumption-road-heavy-duty-vehicles-european.
- Rodríguez, F., “Fuel Consumption Simulation of HDVs in the EU: Comparisons and Limitations,” The International Council on Clean Transportation, White Paper, Mar. 2018, https://www.theicct.org/publications/fuel-consumption-simulation-hdvs-eu-comparisons-and-limitations
- U.S. EPA and U.S. DOT, “Final Rule: Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles-Phase 2,” Federal Register 81(206), Oct. 2016 https://www.gpo.gov/fdsys/pkg/FR-2016-10-25/pdf/2016-21203.pdf.
- “Regulation (EU) 2017/2400 of 12 December 2017 implementing Regulation (EC) No 595/2009 of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles and amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EU) No 582/2011,” Off. J. Eur. Union, vol. L 349, Dec. 2017, http://eur-lex.europa.eu/legal-content/EN/TXT/?uri=OJ:L:2017:349:TOC.
- Gururaja, P., “Wind-Averaged Drag Determination for Heavy-Duty Vehicles Using On-Road Constant-Speed Torque Tests,” SAE Technical Paper 2016-01-8153, 2016, doi:10.4271/2016-01-8153.
- Gururaja, P., “Evaluation of Coastdown Analysis Techniques to Determine Aerodynamic Drag of Heavy-Duty Vehicles,” SAE Technical Paper 2016-01-8151, 2016, doi:10.4271/2016-01-8151.
- Fontaras, G., Dilara, P., Berner, M., Volkers, T. et al., “An Experimental Methodology for Measuring of Aerodynamic Resistances of Heavy Duty Vehicles in the Framework of European CO 2 Emissions Monitoring Scheme,” SAE Int. J. Commer. Veh. 7(1):102-110, Apr. 2014, doi:10.4271/2014-01-0595.
- Rexeis, M., Röck, M., and Hausberger, S., “Comparison of Fuel Consumption and Emissions for Representative Heavy-Duty Vehicles in Europe,” Technische Universität Graz, FVT-099/17/Rex EM 16/18-6790, Mar. 2018, https://www.theicct.org/publications/HDV-EU-fuel-consumption-and-emissions-comparison.
- Thiruvengadam, A., Besch, M., Demirgok, B., Carder, D. et al., “Fuel Consumption and Emissions Testing of a Best-In-Class Tractor-Trailer in the US,” West Virginia University, May 2018, www.theicct.org/publications/HDV-US-best-in-class-fuel-consumption-testing.
- Rodríguez, F., “The European Commission’s Proposed CO2 Standards for Heavy-Duty Vehicles,” The International Council on Clean Transportation, Policy update, Jun. 2018, https://www.theicct.org/publications/european-commissions-proposed-co2-standards-heavy-duty-vehicles.
- Touma, J.S., “Dependence of the Wind Profile Power Law on Stability for Various Locations,” Journal of the Air Pollution Control Association 27(9):863-866, September 1, 1977, doi:10.1080/00022470.1977.10470503.
- Hall, D.E. and Moreland, J.C., “Fundamentals of Rolling Resistance,” Rubber Chem. Technol. 74(3):525-539, Jul. 2001 http://www.rubberchemtechnol.org/doi/abs/10.5254/1.3547650.
- U.S. EPA and U.S. DOT, “Final Rule: Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles-Phase 2. Regulatory Impact Analysis,” Environmental Protection Agency and Department of Transportation, EPA-420-R-16-900, Aug. 2016, https://nepis.epa.gov/Exe/ZyPDF.cgi/P100P7NS.PDF?Dockey=P100P7NS.PDF.
- Frank, T., “Aerodynamik von schweren Nutzfahrzeugen - Stand des Wissens -,” Forschungsvereinigung Automobiltechnik e. V. (FAT), Berlin, 241, 2012, https://www.vda.de/de/services/Publikationen/fat-schriftenreihe-241.html.