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

Natalia Szymlet, Michalina Kamińska, Andrzej Ziółkowski () and Jakub Sobczak
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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

Energies, 2024, vol. 17, issue 15, 1-20

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.

Keywords: non-road mobile machinery; rail bus; exhaust emission; NRTC cycle; real operating conditions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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