The μ-PW Friction Tester as a New Device to Assess the Value of Friction Coefficient Between Vehicle Wheels and The Road Surface at the Traffic Accident Scene

Witold Luty


The main purpose of this paper is to present a new friction tester named μ-PW. The tester has been developed to use at the traffic accident scene to assess the friction coefficient between vehicle wheels and the road surface. There are many less or more complicated friction testers which could be used in such purpose. But it is very important to provide and control appropriate measurement conditions. There are also many other features of friction tester which are especially expected when used at the traffic accident scene to assess the friction coefficient between vehicle wheels and road surface. These features have been described. Basing on them, the μ-PW Friction Tester has been developed. A design and operation of that tester has been shown. The protocol of measurement and sample measurement results confirming the properties of the tester have been analyzed. But experimental comparative research involving μ-PW Friction Tester and dynamometric trailer SRT-4 with real tire tested were the most important. These research were aimed to obtain a correlation between the friction coefficient of rubber sample and the real tired wheel to the road surface. The research have been performed using many types of tires (summer/winter tires, different manufacturers, new and worn tires) in a wide scope of changes in speed during wheel braking. A model of tire-road interaction has been used in order to correlate the rubber sample-road surface friction coefficient with the friction coefficient between real tire and the road surface. Determined model coefficients make possible to estimate the value of the tire friction coefficients to the road surface basing on the rubber sample friction coefficient to the rod surface, measured with the μ-PW Friction Tester.
Author Witold Luty (FT / DVMO)
Witold Luty,,
- Department of Vehicle Maintance and Operation
Publication size in sheets0.5
Book M. Bogdevicius (eds.): Transbaltica 2013. Proceedings of the 8th International Scientific Conference, Transbaltica, 2013, Saulėtekio al. 11, LT-10223 Vilnius, VGTU Press "Technika", ISBN 978-609-457-469-6, [978-609-457-470-2], 301 p.
Keywords in EnglishTraffic safety; friction coefficient between vehicle wheels and the road surface; traffic accident scene description; traffic accident reconstruction process
Languageen angielski
LicenseRepository; author's original; Uznanie Autorstwa - Użycie Niekomercyjne (CC-BY-NC); after publication
Witold Luty - mi PW friction-1 - references corrected.pdf 630.22 KB
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