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Permeability of sinter bronze friction material for wet clutches
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-3157-4632
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-1033-0244
2008 (English)In: Tribology Transactions, ISSN 1040-2004, E-ISSN 1547-397X, Vol. 51, no 3, p. 303-309Article in journal (Refereed) Published
Abstract [en]

The characteristics of wet clutches are of great importance for the overall behavior of the drive trains of many modern vehicles. It is considered that the clutch characteristic is affected by the permeability of the friction material. The permeability is considered to influence both the time of engagement and the temperature in the clutch due to the lubricant flow in the permeable material. In this work, a permeability measurement method suitable for wet clutch friction materials is thus used to measure the permeability of a friction material made of sintered bronze. This friction material is suitable for application such as limited slip differentials or other wet clutches that have to withstand high temperature and high torque transfer. The permeability is also investigated for friction materials with pressed groove patterns. Wet clutch friction material permeability is often accounted for in simulations but the method used to measure the permeability is seldom described. The permeability of the investigated friction material is shown to be so small that it will hardly will affect the temperature in the material due to cooling oil flow inside the material. However, the engagement time can be influenced by the permeability. It is also shown that pressed groove patterns can seal the friction material so that it becomes almost impermeable.

Place, publisher, year, edition, pages
2008. Vol. 51, no 3, p. 303-309
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear) Fluid Mechanics and Acoustics
Research subject
Machine Elements; Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-5841DOI: 10.1080/10402000701732292ISI: 000257058100008Scopus ID: 2-s2.0-46249133550Local ID: 406664a0-71af-11dc-86ab-000ea68e967bOAI: oai:DiVA.org:ltu-5841DiVA, id: diva2:978717
Note
Validerad; 2008; 20071003 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Marklund, PärLarsson, RolandLundström, Staffan

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Tribology (Interacting Surfaces including Friction, Lubrication and Wear)Fluid Mechanics and Acoustics

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