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Case Study: the Influence of Oil-based Friction Modifier Quantity on Tram Braking Distance and Noise
Tribology in Industry (2017)
  • Rondos Galas, Brno University of Technology
  • Milan Omasta, Brno university of technology
  • Martin Klapka, Brno University of Technology
  • Sakdirat Kaewunruen, University of Birmingham
  • Ivan Krupka, Brno University of Technology
  • Martin Hartl, Brno University of Technology
In the present study, the twin disc machine and the light rail system was employed in order to investigate the ability of oil-based friction modifier (FM) to optimize adhesion and to reduce noise. The risks associated with poor adhesion conditions after the application of FM were evaluated. Both laboratory and field experiments showed that if the contact is overdosed by FM, the poor adhesion, which results in the extension of braking distance, can occur. In contrast, the smaller quantities do not cause critical adhesion but the effect of FM on the noise reduction is negligible. This study indicates that it can be quite difficult to achieve a reasonable noise reduction without a significant impact on braking distance of tram when the oil-based FM is applied. The field experiments also showed that the carry distance of FM is rather limited, approximately 100 m.
  • Adhesion,
  • Braking distance,
  • Friction modifier,
  • Noise,
  • Wheel-rail contact
Publication Date
July 4, 2017
Publisher Statement
Citation Information
Creative Commons license
Creative Commons License
This work is licensed under a Creative Commons CC_BY International License.