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Analysis of Non-Road Mobile Machinery Homologation Standards in Relation to Actual Exhaust Emissions

Author

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  • Natalia Szymlet

    (Faculty of Civil Engineering and Transport, Institute of Combustion Engines and Powertrains, Poznan University of Technology, Piotrowo 3, PL-60965 Poznan, Poland)

  • Michalina Kamińska

    (Faculty of Civil Engineering and Transport, Institute of Combustion Engines and Powertrains, Poznan University of Technology, Piotrowo 3, PL-60965 Poznan, Poland)

  • Andrzej Ziółkowski

    (Faculty of Civil Engineering and Transport, Institute of Combustion Engines and Powertrains, Poznan University of Technology, Piotrowo 3, PL-60965 Poznan, Poland)

  • Jakub Sobczak

    (Faculty of Civil Engineering and Transport, Institute of Combustion Engines and Powertrains, Poznan University of Technology, Piotrowo 3, PL-60965 Poznan, Poland)

Abstract

This article presents issues related to the current approval procedures in the group of off-road vehicles. Our research aimed to demonstrate significant differences between actual railway vehicle operation and stationary homologation tests regarding exhaust emissions. The research cycle consisted of analyzing emissions of toxic compounds from exhaust systems under real operating conditions, supplemented by a temporal share analysis based on the denormalized NRTC test upon which the tested object was homologated. Based on the conducted analyses, a significant difference was found between the actual operation of the tested railway vehicle and the stationary homologation test. By interpreting emission intensities within the parameter ranges of the propulsion unit’s operation, key areas with a significant impact on the vehicle’s overall emissions were identified. Based on the obtained results, a critical opinion is expressed regarding current homologation standards for the off-road vehicle group and the necessity for further empirical research in the area of actual operation of the tested vehicle group.

Suggested Citation

  • Natalia Szymlet & Michalina Kamińska & Andrzej Ziółkowski & Jakub Sobczak, 2024. "Analysis of Non-Road Mobile Machinery Homologation Standards in Relation to Actual Exhaust Emissions," Energies, MDPI, vol. 17(15), pages 1-20, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:15:p:3624-:d:1441427
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    References listed on IDEAS

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    1. 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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