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A Test Stand Study on the Volatile Emissions of a Passenger Car Brake Assembly
Brembo S.p.A., 24040 Stezzano (BG), Italy.
Department of Chemistry, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic.
Brembo S.p.A., 24040 Stezzano (BG), Italy.
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Design (Div.).ORCID iD: 0000-0003-0696-7506
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2019 (English)In: Atmosphere, ISSN 2073-4433, E-ISSN 2073-4433, Vol. 10, no 5, article id 263Article in journal (Refereed) Published
Abstract [en]

Brake-related airborne particulate matter contributes to urban emissions in the transport sector. Recent research demonstrated a clear dependence of the number of ultra-fine particles on the disc brake temperature. Above the so-called transition temperature, the number of ultra-fine particles increases dramatically (several magnitudes). As for exhaust emissions, part of the emissions released during braking can be in the volatile fraction. For this reason, a disc brake test stand specifically designed for aerosol research was equipped with three different aerosol sampling instruments: (i) a standard cascade impactor, (ii) a cascade impactor operating at high temperature with a heated sampling line, and (iii) a standard cascade impactor with a thermodenuder. Tests with a brake assembly representative of European passenger vehicles were executed, and the concentration of released airborne particles was determined. The results showed a decrease by several magnitudes in the concentration (in the size range of below 200 nm) using the cascade impactor operating at 180 °C with the sampling line heated to 200 °C. A further decrease in the concentration of airborne particles with size fractions below 200 nm was measured using a standard cascade impactor with a thermodenuder heated to 300 °C.

Place, publisher, year, edition, pages
2019. Vol. 10, no 5, article id 263
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:kth:diva-254155DOI: 10.3390/atmos10050263ISI: 000472677600037OAI: oai:DiVA.org:kth-254155DiVA, id: diva2:1327900
Funder
EU, FP7, Seventh Framework Programme, 324385
Note

QC 20190624

Available from: 2019-06-20 Created: 2019-06-20 Last updated: 2019-11-12Bibliographically approved

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Publisher's full texthttps://doi.org/10.3390/atmos10050263

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Wahlström, JensOlofsson, Ulf

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