This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Exhaust Emissions of Gaseous and Solid Pollutants Measured over the NEDC, FTP-75 and WLTC Chassis Dynamometer Driving Cycles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 05, 2016 by SAE International in United States
Annotation ability available
Concern over greenhouse gas (GHG) emissions and air quality has made exhaust emissions from passenger cars a topic interest at an international level. This situation has led to the re-evaluation of testing procedures in order to produce more “representative” results. Laboratory procedures for testing exhaust emissions are built around a driving cycle. Cycles may be developed in one context but later used in another: for example, the New European Driving Cycle (NEDC) was not developed to measure fuel consumption, but has ended up being used to that end. The new Worldwide harmonized Light vehicles Test cycle (the WLTC) will sooner or later be used for measuring regulated exhaust emissions. Legal limits for emissions of regulated pollutants are inherently linked to the test conditions (and therefore to the driving cycle); inter-cycle correlations for regulated pollutants are an important research direction. This study considers the current European cycle (the NEDC), the WLTC and the main US legislative cycle (known as the FTP-75). Quantitative comparisons of the three driving cycles are presented. The experimental study tested nine European vehicles over the three driving cycles, measuring regulated emissions according to the applicable test procedure. All testing was performed on a chassis dynamometer within a climate controlled laboratory, using a constant volume sampler (CVS) system. Both increases and decreases from the NEDC emissions baseline were observed. Inter-cycle changes in regulated pollutants were found to be up to two orders of magnitude greater than the corresponding changes in CO2 emissions.
CitationBielaczyc, P., Woodburn, J., and Szczotka, A., "Exhaust Emissions of Gaseous and Solid Pollutants Measured over the NEDC, FTP-75 and WLTC Chassis Dynamometer Driving Cycles," SAE Technical Paper 2016-01-1008, 2016, https://doi.org/10.4271/2016-01-1008.
- Sousanis, J., “World Vehicle Population Tops 1 Billion Units,” Wards Auto, Aug 15 2011, http://wardsauto.com/ar/world_vehicle_population_110815, accessed 29 Sept 2014.
- Joumard, R., André, M., Vidon, R., Tassel, P., Pruvost, C., “Influence of driving cycles on unit emissions from passenger cars,” Atmospheric Environment, Volume 34, Issue 27, 2000, Pages 4621-4628, ISSN 1352-2310, doi:0.1016/ S1352-2310(00)00118-7.
- de Haan, P., Keller, M., “Emission factors for passenger cars: application of instantaneous emission modeling,” Atmospheric Environment, Volume 34, Issue 27, 2000, Pages 4629-4638, ISSN 1352-2310, doi:10.1016/S1352-2310(00)00233-8.
- Barlow, T.J., Latham, S., McCrae, I.S. and Boulter, P.G., “A reference book of driving cycles for use in the measurement of road vehicle emissions,” Report PPR354, 2009, https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/4247/ppr-354.pdf, accessed 01 May 2013.
- Bielaczyc, P., Woodburn, J. and Szczotka, A., “The WLTP as a New Tool for the Evaluation of CO2 Emissions,” FISITA Automotive World Congress, 2-6 June 2014, Maastrich (The Netherlands), paper F2014-CET-139, 2014.
- Marotta, A., “An Overview of WLTP and its Implementation in the European Legislation plus some Preliminary Comparison with NEDC,” Trends in Automotive Emissions, fuels, lubricants, legislation and test methods - present and future - 2014, proceedings of The 4th International Exhaust Emissions Symposium, 22-23 May 2014, Bielsko-Biala (Poland), 2014, paper no. PTNSS-2014-310, ISBN: 978-83-931383-7-1, (CDROM), included in Combustion Engines, No. 3/2014 (158), 2014.
- Marotta, A., Pavlovic, J., Ciuffo, B., Serra, S., and Fontaras, G., “Gaseous Emissions from Light-Duty Vehicles: Moving from NEDC to the New WLTP Test Procedure,” Environmental Science & Technology 2015 49 (14), 8315-8322, doi:10.1021/acs.est.5b01364.
- Favre, C., Bosteels, D., and May, J., "Exhaust Emissions from European Market-Available Passenger Cars Evaluated on Various Drive Cycles," SAE Technical Paper 2013-24-0154, 2013, doi:10.4271/2013-24-0154.
- Demuynck, J., Bosteels, D., De Paepe, M., Favre, C. et al., “Recommendations for the new WLTP cycle based on an analysis of vehicle emission measurements on NEDC and CADC,” Energy Policy, Volume 49, October 2012, Pages 234-242, ISSN 0301-4215, doi:10.1016/j.enpol.2012. 05.081.
- United Nations Economic Commission for Europe, “Addendum 15: Global technical regulation No. 15 - Global technical regulation on the Worldwide harmonized Light vehicles Test Procedures,” 12 May 2014, http://www.unece.org/fileadmin/DAM/trans/main/wp29/wp29r-1998agr-rules/ECE-TRANS-180a15app1e.pdf, accessed 13 October 2014.
- May, J., Bosteels, D., Favre, C., “A Comparison of Light-Duty Vehicle Emissions over Different Test Cycles and in Real Driving Conditions,” FISITA paper F2014-CET-058, 2014.
- Sileghem, L., Bosteels, D., May, J., Favre, C. and Verhlest, S., “Analysis of Vehicle Emission Measurements on the new WLTC, the NEDC and the CADC,” Transportation Research Part D 32 (2014) 70-85, 2014, doi:10.1016/j.trd.2014.07.008.
- Cécile Favre, John May & Dirk Bosteels, “Emissions control technologies to meet current and future European vehicle emissions legislation,” [undated], available online: http://www.aecc.eu/content/pdf/Emissions%20Control%20Technologies%20to%20meet%20current%20and%20future%20European%20vehicle%20emissions%20legislation.pdf, accessed 01 October 2015.
- Heywood, J.B., “Internal Combustion Engine Fundamentals,” 1988, (McGraw-Hill, New York, USA), ISBN: 978-0070286375.
- Bielaczyc, P., Woodburn, J., and Szczotka, A., “A Comparison of Carbon Dioxide Exhaust Emissions and Fuel Consumption for Vehicles Tested over the NEDC, FTP-75 and WLTC Chassis Dynamometer Test Cycles,” SAE Technical Paper 2015-01-1065, 2015, doi:10.4271/2015-01-1065.
- United Nations Economic Commission for Europe, “Addendum 82: Regulation No. 83 Revision 5,” 4 February 2015, available online: http://www.unece.org/fileadmin/DAM/trans/main/wp29/wp29regs/R083r5e.pdf, accessed 04 March 2015.
- United States Code of Federal Regulations, 40 CFR 1066 - Vehicle-Testing Procedures, available online: https://www.gpo.gov/fdsys/granule/CFR-2012-title40-vol34/CFR-2012-title40-vol34-part1066, accessed 04 September 2015.