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Comparison between the WLTC and the FTP-75 driving cycles applied to a 1.4 L light-duty vehicle running on ethanol
Technical Paper
2019-36-0144
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The forecast scenarios regarding the environmental pollution raises a question whether the current vehicle emission certification is reliable enough to assure fleet agreement with the legal limits. Type approval tests have been performed on chassis dynamometer in order to evaluate the emission factors and fuel consumption for passenger cars. Standardized procedures such as the FTP-75 proposed in the United States (currently incorporated in the Brazilian legislation) and the Worldwide harmonized Light vehicles Test Cycle (WLTC), a transient driving cycle model designed by the European Union to overcome the shortcomings of the New European Driving Cycle (NEDC), are discussed in this paper. Both cycles were performed in a chassis dynamometer with a flex-fuel passenger car running on ethanol blend (E92W08). The driver, vehicle and fuel were kept constant so the comparison between the cycles would not be compromised. The vehicle chosen was a 1.4 dm3 displaced volume FIAT sedan with maximum power of 60 kW at 5500 rpm and maximum torque of 122 Nm at 2250 rpm. The cycle dynamics and the engine operation points were assessed in this paper. The five points estimated as the most representative of both tests were selected for steady-state investigations conducted using hydrous-ethanol (E97W03), which is the ethanol blend available in Brazilian fuel stations. These points were evaluated in terms of fuel consumption and air excess factor. The results showed that the FTP-75 demanded greater average and maximum acceleration values, implying on more aggressive driving conditions. The WLTC presented a more homogeneous acceleration per speed diagram, providing higher average speed and speed standard deviation (e.g. more transient conditions) which is more like the real drive conditions. It could be seen that the WLTC covers a wider range of engine operation conditions holding more dispersed points than the FTP-75. In addition, the WLTC contained points with higher load, which made the results for fuel consumption to be higher compared to FTP-75. The engine operation points provided by the FTP-75 were excessively condensed. Therefore, it could be concluded that the FTP-75 can be a predictable test with repeated points of operation. The WLTC does not have sufficient number of trips in its schedule, which is different from the behavior expected in real-world driving conditions. Also, it could be observed that depending on the test specifications the driver can largely influence the performance of the vehicle.
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Authors
- Maria F. P. Mazer - Federal University of Santa Maria
- Leonardo S. Hatschbach - Federal University of Santa Maria
- Igor R. dos Santos - Federal University of Santa Maria
- Juliano P. Silveira - Federal University of Santa Maria
- Roberto A. Garlet - Federal University of Santa Maria
- Mario E. S. Martins - Federal University of Santa Maria
- Macklini Dalla Nora - Federal University of Santa Maria
Topic
Citation
Mazer, M., Hatschbach, L., dos Santos, I., Silveira, J. et al., "Comparison between the WLTC and the FTP-75 driving cycles applied to a 1.4 L light-duty vehicle running on ethanol," SAE Technical Paper 2019-36-0144, 2020, https://doi.org/10.4271/2019-36-0144.Data Sets - Support Documents
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References
- Krzyzanowski , Michal , Birgit Kuna-Dibbert , and Jürgen Schneider 2005 Health Effects of Transport-Related Air Pollution Michal Krzynawoski Copenhagen World Health Organization
- Laumbach , Robert J. , and Howard M. Kipen 2012 Respiratory Health Effects of Air Pollution: Update on Biomass Smoke and Traffic Pollution Journal of Allergy and Clinical Immunology 129 1 3 11 https://doi.org/10.1016/j.jaci.2011.11.021
- Sydbom , A. , A. Blomberg , S. Parnia , N. Stenfors , T. Sandström , and S.-E. Dahlén 2001 Health Effects of Diesel Exhaust Emissions European Respiratory Journal 17 4 733 46 https://doi.org/10.1183/09031936.01.17407330
- European Parliament, and Council of the European Union June (2007 http://eurlex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2004:139:0 001:0054:en:PDF
- Council, International 2017
- Rios-torres , Jackeline , Jun Liu , and Asad Khattak 2019 https://doi.org/10.1080/15568318.2018.1445321
- Donateo , T. and Giovinazzi , M. Some Repeatability and Reproducibility Issues in Real Driving Emission Tests SAE Technical Paper 2018-01-5020 2018 https://doi.org/10.4271/2018-01-5020
- Merkisz , J. , Pielecha , J. , Bielaczyc , P. , and Woodburn , J. Analysis of Emission Factors in RDE Tests As Well as in NEDC and WLTC Chassis Dynamometer Tests SAE Technical Paper 2016-01-0980 2016 https://doi.org/10.4271/2016-01-0980
- Thomas , D. , Li , H. , Wang , X. , Song , B. et al. A Comparison of Tailpipe Gaseous Emissions for RDE and WLTC Using SI Passenger Cars SAE Technical Paper 2017-01-2391 2017 https://doi.org/10.4271/2017-01-2391
- Kay , P. Feasibility of Virtual Environments to Develop Future Driving Cycles SAE Technical Paper 2018-01-1816 2018 https://doi.org/10.4271/2018-01-1816
- Varella , Roberto A. , Marta V. Faria , Pablo Mendoza-villafuerte , Patrícia C. Baptista , Luis Sousa , and Gonçalo O. Duarte 658 2019 879 94 https://doi.org/10.1016/j.scitotenv.2018.12.053
- Esser , A. , Zeller , M. , Foulard , S. , and Rinderknecht , S. Stochastic Synthesis of Representative and Multidimensional Driving Cycles SAE Int. J. Alt. Power. 7 3 263 272 2018 https://doi.org/10.4271/2018-01-0095
- Kamguia Simeu , S. and Kim , N. Standard Driving Cycles Comparison (IEA) & Impacts on the Ownership Cost SAE Technical Paper 2018-01-0423 2018 https://doi.org/10.4271/2018-01-0423
- Kageson , Per 1998 10
- Pelkmans , Luc , and Patrick Debal Comparison of On-Road Emissions with Emissions Measured on Chassis Dynamometer Test Cycles Transportation Research Part D: Transport and Environment 11 4 July 2006 233 41 https://doi.org/10.1016/j.trd.2006.04.001
- Weiss , Martin , Pierre Bonnel , Jörg Kühlwein , Alessio Provenza , Udo Lambrecht , Stefano Alessandrini , Massimo Carriero , et al. Will Euro 6 Reduce the NOx Emissions of New Diesel Cars? - Insights from on-Road Tests with Portable Emissions Measurement Systems (PEMS) Atmospheric Environment 62 2 December 2012 657 65 https://doi.org/10.1016/j.atmosenv.2012.08.056
- Nyberg , Peter , Erik Frisk , and Lars Nielsen Driving Cycle Adaption and Design Based on Mean Tractive Force IFAC Proceedings Volumes 46 21 2013 689 94 https://doi.org/10.3182/20130904-4-JP-2042.00113
- de Melo , T. , Botero , S. , de Carvalho , R. , Villela , A. et al. Light duty vehicle fuel economy Comparison of ice, hybrid and electric vehicles based on different driving cycles SAE Technical Paper 2018-36-0035 2018 https://doi.org/10.4271/2018-36-0035
- Giakoumis , Evangelos G. , and Alexandros T. Zachiotis Comparative Evaluation of Elight Legislated Driving Schedules in Terms of Cycle Metrics and Emissions from a Diesel-Powered Turbocharged Van Transportation Research Part D: Transport and Environment 58 January 2018 139 54 https://doi.org/10.1016/j.trd.2017.11.002
- Sileghem , Louis , Dirk Bosteels , John May , Cécile Favre , and Sebastian Verhelst Analysis of Vehicle Emission Measurements on the New WLTC, the NEDC and the CADC Transportation Research Part D: Transport and Environment 32 October 2014 70 85 https://doi.org/10.1016/j.trd.2014.07.008
- Olmos , A. , Banhara , R. , Engler Pinto , C. , and Georges , M. Emissions, fuel economy and energy consumption of a flex fuel vehicle in different driving cycles SAE Technical Paper 2018-36-0225 2018 https://doi.org/10.4271/2018-36-0225
- Suarez-Bertoa , R. , A.A. Zardini , H. Keuken , and C. Astorga Impact of Ethanol Containing Gasoline Blends on Emissions from a Flex-Fuel Vehicle Tested over the Worldwide Harmonized Light Duty Test Cycle (WLTC) Fuel 143 March 2015 173 82 https://doi.org/10.1016/j.fuel.2014.10.076
- Heywood , John B. 1988 Internal Combustion Engine Fundamentals 21 1988 https://doi.org/10987654
- PARK , J , and H WI ANALYSING UNCERTAINTY IN EVALUATION OF VEHICLE FUEL ECONOMY USING FTP-75 14 3 2013 471 77 https://doi.org/DOI 10.1007/s12239-013-0051-x
- Pathak , S. , Singh , Y. , sood , V. , and Channiwala , S. On-Road Vehicle Driving and Energy Requirements and Impact on Unregulated Exhaust Emissions under Urban Driving Conditions SAE Int. J. Engines 10 4 1866 1879 2017 https://doi.org/10.4271/2017-01-1013