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Which factor contributes more to the fuel consumption gap between in-laboratory vs. real-world driving conditions? An independent component analysis

Author

Listed:
  • Fan, Pengfei
  • Yin, Hang
  • Lu, Hongyu
  • Wu, Yizheng
  • Zhai, Zhiqiang
  • Yu, Lei
  • Song, Guohua

Abstract

A widening vehicle fuel consumption gap has been found between in-laboratory and real-world driving conditions, which can undermine policy-making concerning energy saving and greenhouse gas reduction. Various factors have been identified as contributors to the gap; however, their contributions have not been independently assessed, which hinders the gap's narrowing. This study confirmed an average gap of 42% based on 0.95 billion records of second-by-second vehicle operating (speed, acceleration, etc.) and fuel consumption data collected from 395 light-duty vehicles through On-board Diagnostics (OBD) devices in Beijing. Contributions of fuel consumption rate (FCR)-related, engine load-related, and road grade discrepancies between the in-laboratory test procedure vs. real-world driving conditions to the gap were independently assessed. Results indicated that the FCR-related, engine load-related, and road grade discrepancies contributed 20.7%, 17.0%, and 3.2% to the gap, respectively (only 1.0% of the gap has not been explained). Replacing the test cycle from the New European Driving Cycle (NEDC) with the China Light-duty vehicle Test Cycle (CLTC-P) has the potential to reduce the engine load-related gap from 17.0% to 6.9% in Beijing. Policies should focus on developing more local test procedures or recording real-world fuel consumption through onboard devices to evaluate vehicle economy with higher reality representation.

Suggested Citation

  • Fan, Pengfei & Yin, Hang & Lu, Hongyu & Wu, Yizheng & Zhai, Zhiqiang & Yu, Lei & Song, Guohua, 2023. "Which factor contributes more to the fuel consumption gap between in-laboratory vs. real-world driving conditions? An independent component analysis," Energy Policy, Elsevier, vol. 182(C).
    • Handle: RePEc:eee:enepol:v:182:y:2023:i:c:s0301421523003245
    DOI: 10.1016/j.enpol.2023.113739
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    1. Huo, Hong & Yao, Zhiliang & He, Kebin & Yu, Xin, 2011. "Fuel consumption rates of passenger cars in China: Labels versus real-world," Energy Policy, Elsevier, vol. 39(11), pages 7130-7135.
    2. Ntziachristos, L. & Mellios, G. & Tsokolis, D. & Keller, M. & Hausberger, S. & Ligterink, N.E. & Dilara, P., 2014. "In-use vs. type-approval fuel consumption of current passenger cars in Europe," Energy Policy, Elsevier, vol. 67(C), pages 403-411.
    3. Wang, An & Tu, Ran & Xu, Junshi & Zhai, Zhiqiang & Hatzopoulou, Marianne, 2022. "A novel modal emission modelling approach and its application with on-road emission measurements," Applied Energy, Elsevier, vol. 306(PA).
    4. Greene, David L. & Khattak, Asad J. & Liu, Jun & Wang, Xin & Hopson, Janet L. & Goeltz, Richard, 2017. "What is the evidence concerning the gap between on-road and Environmental Protection Agency fuel economy ratings?," Transport Policy, Elsevier, vol. 53(C), pages 146-160.
    5. Pavlovic, J. & Ciuffo, B. & Fontaras, G. & Valverde, V. & Marotta, A., 2018. "How much difference in type-approval CO2 emissions from passenger cars in Europe can be expected from changing to the new test procedure (NEDC vs. WLTP)?," Transportation Research Part A: Policy and Practice, Elsevier, vol. 111(C), pages 136-147.
    6. Pavlovic, Jelica & Marotta, Alessandro & Ciuffo, Biagio, 2016. "CO2 emissions and energy demands of vehicles tested under the NEDC and the new WLTP type approval test procedures," Applied Energy, Elsevier, vol. 177(C), pages 661-670.
    7. Rosero, Fredy & Fonseca, Natalia & López, José-María & Casanova, Jesús, 2021. "Effects of passenger load, road grade, and congestion level on real-world fuel consumption and emissions from compressed natural gas and diesel urban buses," Applied Energy, Elsevier, vol. 282(PB).
    8. Tietge, Uwe & Mock, Peter & Franco, Vicente & Zacharof, Nikiforos, 2017. "From laboratory to road: Modeling the divergence between official and real-world fuel consumption and CO2 emission values in the German passenger car market for the years 2001–2014," Energy Policy, Elsevier, vol. 103(C), pages 212-222.
    9. Zhang, Shaojun & Wu, Ye & Liu, Huan & Huang, Ruikun & Un, Puikei & Zhou, Yu & Fu, Lixin & Hao, Jiming, 2014. "Real-world fuel consumption and CO2 (carbon dioxide) emissions by driving conditions for light-duty passenger vehicles in China," Energy, Elsevier, vol. 69(C), pages 247-257.
    10. Ben Dror, Maya & Qin, Lanzhi & An, Feng, 2019. "The gap between certified and real-world passenger vehicle fuel consumption in China measured using a mobile phone application data," Energy Policy, Elsevier, vol. 128(C), pages 8-16.
    11. Costagliola, Maria Antonietta & Costabile, Marianeve & Prati, Maria Vittoria, 2018. "Impact of road grade on real driving emissions from two Euro 5 diesel vehicles," Applied Energy, Elsevier, vol. 231(C), pages 586-593.
    12. Evangelos G. Giakoumis & Alexandros T. Zachiotis, 2017. "Investigation of a Diesel-Engined Vehicle’s Performance and Emissions during the WLTC Driving Cycle—Comparison with the NEDC," Energies, MDPI, vol. 10(2), pages 1-19, February.
    13. Yu, Rujie & Ren, Huanhuan & Liu, Yong & Yu, Biying, 2021. "Gap between on-road and official fuel efficiency of passenger vehicles in China," Energy Policy, Elsevier, vol. 152(C).
    14. Wu, Tian & Han, Xiao & Zheng, M. Mocarlo & Ou, Xunmin & Sun, Hongbo & Zhang, Xiong, 2020. "Impact factors of the real-world fuel consumption rate of light duty vehicles in China," Energy, Elsevier, vol. 190(C).
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