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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sivebæk, Ion Marius
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2023Wear and friction of PEEK composites, dry or lubricatedcitations
- 2022Wear and friction of PEEK composites, dry or lubricated
- 2021Dynamic mechanical analysis as a predictor for slip resistance and traction in footwearcitations
- 2020Role of lattice trapping for sliding frictioncitations
- 2020Cylinder-flat-surface contact mechanics during slidingcitations
- 2017Editorial
- 2017Editorial: Special Issue: Selected conference papers from the Nord-Trib 2014 conference
- 2015Preface to NORDTRIB 2014
- 2011Asperity deformation during running-in
- 2010Velocity Dependence of Friction of Confined Hydrocarbonscitations
- 2010Asperity deformation during running-in
- 2009Velocity dependence of friction of confined polymers
- 2008On the origin of Amonton’s friction lawcitations
- 2008The effect of gasses on the viscosity of dimethyl ethercitations
- 2007The viscosity of dimethyl ethercitations
- 2006New Tribotester For Polymeric Materials
- 2006A Preliminary Study Of The Effect Of Some Pressurising Gasses On The Viscosity Of Dimethyl Ether
- 2003On the nature of the static friction, kinetic friction and creepcitations
- 2003Lubrication and wear in diesel engine injection equipment fuelled by dimethyl ether (DME)
- 2002Dimethyl Ether (DME) - Development and Test of the New Volatile Fuel Tribo-Tester VFTT
- 2002The influence of molecule size and structure on the lubricity of liquids: An experimental study
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document
The influence of molecule size and structure on the lubricity of liquids: An experimental study
Abstract
In the 1980s, the sulphur content of diesel oil was reduced for environmental reasons. As a result of this, breakdowns of diesel engine injection equipment due to extensive wear were observed. It appeared that the cause of this was the contribution of sulphur containing species to the lubricity of the fuel. The lubricity of a liquid is defined as its ability to protect the surfaces in the boundary lubrication regime. The wear was reduced, as it is today, by addition of anti-wear agents to the fuel. In order to establish the adequate amount of additive, laboratory tests appeared based on a steel ball sliding on a steel disk, the contact only being lubricated by the tested fuel. The result of a test is the measure of the size of the wear scar on the ball.In 1995 a new clean fuel for diesel engines appeared: Dimethyl Ether (DME). DME is a volatile fuel meaning that it has to be pressurised in order to stay liquid. Recently a lubricity test capable of handling DME was developed [1], as well as a volatile fuel viscometer [2].As a result of this development it has become possible to test the lubricity of small hydrocarbons such as propane and butane as well as liquids with larger molecules. The results of these tests are very well suited for comparison with the outcome of friction and wear models [3], as only simple molecules can be included in these today.