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From lab-to-road & vice-versa: Using a simulation-based approach for predicting real-world CO2 emissions

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  • Tsiakmakis, Stefanos
  • Fontaras, Georgios
  • Dornoff, Jan
  • Valverde, Victor
  • Komnos, Dimitrios
  • Ciuffo, Biagio
  • Mock, Peter
  • Samaras, Zissis

Abstract

CO2 emissions of light-duty vehicles are certified over standardised, laboratory-based conditions and reported to the consumers. Such tests reflect specific operating conditions that differ from what an individual driver experiences. Vehicle simulation can bridge the gap and help provide customised, vehicle and trip-specific values. This study investigates the potential of using a simulation-based approach for calculating CO2 emissions over real-world operation, when limited information and test-data are available. The methodology introduced in the European vehicle certification regulation since 2017 is used as a basis. Seven vehicles were tested over multiple on-road trips and in some cases on a chassis dyno. First, the analysis focused on the accuracy of the simulations when only limited information for the vehicle and its components are used. Subsequently, the model was calibrated on test data. The first case presented an error between 1.0% and 4.4% depending on the test, while the standard deviation was 10.0%. When using WLTP for calibration, the average error dropped to −2.9% to −0.2%, and the standard deviation decreased to 2.0%. When calibrating over on-road tests, the average error was 0.7% for the on-road tests and 4.5% for the WLTP.

Suggested Citation

  • Tsiakmakis, Stefanos & Fontaras, Georgios & Dornoff, Jan & Valverde, Victor & Komnos, Dimitrios & Ciuffo, Biagio & Mock, Peter & Samaras, Zissis, 2019. "From lab-to-road & vice-versa: Using a simulation-based approach for predicting real-world CO2 emissions," Energy, Elsevier, vol. 169(C), pages 1153-1165.
    • Handle: RePEc:eee:energy:v:169:y:2019:i:c:p:1153-1165
    DOI: 10.1016/j.energy.2018.12.063
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    3. Hugo Ferreira & Carlos Manuel Rodrigues & Carlos Pinho, 2019. "Impact of Road Geometry on Vehicle Energy Consumption and CO 2 Emissions: An Energy-Efficiency Rating Methodology," Energies, MDPI, vol. 13(1), pages 1-27, December.
    4. Song, Jingeun & Cha, Junepyo, 2022. "Development of prediction methodology for CO2 emissions and fuel economy of light duty vehicle," Energy, Elsevier, vol. 244(PB).
    5. Karol Tucki & Andrzej Wasiak & Olga Orynycz & Remigiusz Mruk, 2020. "Computer Simulation as a Tool for Managing the Technical Development of Methods for Diagnosing the Technical Condition of a Vehicle," Energies, MDPI, vol. 13(11), pages 1-24, June.
    6. Karol Tucki & Remigiusz Mruk & Olga Orynycz & Katarzyna Botwińska & Arkadiusz Gola & Anna Bączyk, 2019. "Toxicity of Exhaust Fumes (CO, NO x ) of the Compression-Ignition (Diesel) Engine with the Use of Simulation," Sustainability, MDPI, vol. 11(8), pages 1-15, April.
    7. Rosero, Fredy & Fonseca, Natalia & López, José-María & Casanova, Jesús, 2020. "Real-world fuel efficiency and emissions from an urban diesel bus engine under transient operating conditions," Applied Energy, Elsevier, vol. 261(C).

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