Inter-Comparison of Particle and Gaseous Pollutant Emissions of a Euro 4 Motorcycle at Two Laboratories

Piotr Bielaczyc, Wojciech Honkisz, Joseph Woodburn, Andrzej Szczotka, Fabrizio Forloni, Dominique Lesueur and Barouch Giechaskiel
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Piotr Bielaczyc: BOSMAL Automotive R&D Institute Ltd., 43300 Bielsko-Biala, Poland
Wojciech Honkisz: BOSMAL Automotive R&D Institute Ltd., 43300 Bielsko-Biala, Poland
Joseph Woodburn: BOSMAL Automotive R&D Institute Ltd., 43300 Bielsko-Biala, Poland
Andrzej Szczotka: BOSMAL Automotive R&D Institute Ltd., 43300 Bielsko-Biala, Poland
Fabrizio Forloni: Joint Research Centre (JRC), European Commission, 21027 Ispra, Italy
Dominique Lesueur: Joint Research Centre (JRC), European Commission, 21027 Ispra, Italy
Barouch Giechaskiel: Joint Research Centre (JRC), European Commission, 21027 Ispra, Italy

Energies, 2021, vol. 14, issue 23, 1-16

Abstract: The Euro 4 regulation, applicable since 2016 for L-category vehicles (i.e., two and three-wheelers, and mini cars) reduced the emission limits, but also introduced a new cycle, the WMTC (World Harmonized Motorcycle Test Cycle). The emission studies of Euro 4 motorcycles are limited, and most importantly there are no published studies comparing the results of different laboratories applying the new cycle. In this study we compared the particle and gaseous pollutants of one Euro 4 motorcycle measured in two laboratories in 2017 and 2020. The gaseous pollutant results had a variance (one standard deviation of the means) of 0.5% for CO 2 , 4–19% for CO, NO x , HC (hydrocarbons) and SPN (Solid Particle Number). The particulate matter mass results had higher variance of 50–60%. Additional tests with open configuration to mimic dilution at the tailpipe gave equivalent results to the closed configuration for the gaseous pollutants and SPN. The total particles (including volatiles) had significant differences between the two configurations, with the closed configuration giving higher results. The main conclusion of this study is that the new procedures have very good reproducibility, even for the SPN that is not regulated for L-category vehicles. However, the measurement of total particles needs attention due to the high sensitivity of volatile particles to the sampling conditions.

Keywords: air pollution; vehicle emissions; L-category; inter-laboratory comparison; particulate matter (PM); particle number; catalytic stripper (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: 2021
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