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Airborne wear particles from passenger car disc brakes : A comparison of measurements from field tests, a disc brake assembly test stand, and a pin-on-disc machine

Wahlström, J. LU orcid ; Söderberg, A. ; Olander, L. ; Olofsson, U. and Jansson, A. (2010) In Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 224(2). p.179-188
Abstract

Most modern passenger cars have disc brakes on the front wheels. Unlike drum brakes, disc brakes are not sealed off from the ambient air. During braking, both the rotor and the pads wear, and this wear process generates particles that may become airborne. In field tests it is difficult to distinguish these particles from others in the environment. It is thus preferable to conduct tests using laboratory test stands where the cleanness of the surrounding air can be controlled. However, the validity of results from these test stands should be verified by comparison with field tests. This article presents a comparison of the number and volume distributions of airborne wear particles as measured online in field tests, in a disc brake... (More)

Most modern passenger cars have disc brakes on the front wheels. Unlike drum brakes, disc brakes are not sealed off from the ambient air. During braking, both the rotor and the pads wear, and this wear process generates particles that may become airborne. In field tests it is difficult to distinguish these particles from others in the environment. It is thus preferable to conduct tests using laboratory test stands where the cleanness of the surrounding air can be controlled. However, the validity of results from these test stands should be verified by comparison with field tests. This article presents a comparison of the number and volume distributions of airborne wear particles as measured online in field tests, in a disc brake assembly test stand, and in a pin-on-disc machine. In all cases, grey cast iron rotors and low metallic pads were tested. A promising correlation between the three different test methods is shown. The number- and volume-weighted mean particle diameter for all test methods is about 0.4 and 2-3 μ m, respectively.

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author
; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Airborne particles, Disc brake, Field test, Test stand, Wear
in
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
volume
224
issue
2
pages
10 pages
publisher
Professional Engineering Publishing
external identifiers
  • scopus:77249128420
ISSN
1350-6501
DOI
10.1243/13506501JET633
language
English
LU publication?
no
id
637938b1-b842-4cc1-9175-630accbb2408
date added to LUP
2020-04-14 12:43:44
date last changed
2022-03-11 00:29:34
@article{637938b1-b842-4cc1-9175-630accbb2408,
  abstract     = {{<p>Most modern passenger cars have disc brakes on the front wheels. Unlike drum brakes, disc brakes are not sealed off from the ambient air. During braking, both the rotor and the pads wear, and this wear process generates particles that may become airborne. In field tests it is difficult to distinguish these particles from others in the environment. It is thus preferable to conduct tests using laboratory test stands where the cleanness of the surrounding air can be controlled. However, the validity of results from these test stands should be verified by comparison with field tests. This article presents a comparison of the number and volume distributions of airborne wear particles as measured online in field tests, in a disc brake assembly test stand, and in a pin-on-disc machine. In all cases, grey cast iron rotors and low metallic pads were tested. A promising correlation between the three different test methods is shown. The number- and volume-weighted mean particle diameter for all test methods is about 0.4 and 2-3 μ m, respectively.</p>}},
  author       = {{Wahlström, J. and Söderberg, A. and Olander, L. and Olofsson, U. and Jansson, A.}},
  issn         = {{1350-6501}},
  keywords     = {{Airborne particles; Disc brake; Field test; Test stand; Wear}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{2}},
  pages        = {{179--188}},
  publisher    = {{Professional Engineering Publishing}},
  series       = {{Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology}},
  title        = {{Airborne wear particles from passenger car disc brakes : A comparison of measurements from field tests, a disc brake assembly test stand, and a pin-on-disc machine}},
  url          = {{http://dx.doi.org/10.1243/13506501JET633}},
  doi          = {{10.1243/13506501JET633}},
  volume       = {{224}},
  year         = {{2010}},
}