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Adsorption of ATF additives on wet clutch friction interfaces under water contaminated lubricant conditions
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0002-8972-2944
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Kemiteknik.ORCID-id: 0000-0001-9794-8305
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0003-3157-4632
Vise andre og tillknytning
2014 (engelsk)Konferansepaper, Oral presentation only (Fagfellevurdert)
Abstract [en]

Stable friction and positive slope of friction-speed is the typical criterion for a good clutch performance. Lubricated friction interfaces used for wet clutches produces different friction behavior depending on the lubricant conditions. Usually the lubricant conditions vary for different automatic transmission fluid (ATF) formulations implying e.g. water contamination and these conditions might influence the deterioration of the clutch plates. The aim of this paper is to verify additive adsorption on friction interfaces and ageing of the friction material in wet clutch system for a water contaminated commercial ATF (DEXRON® VI). Standard clutch plates are employed in an automated wet clutch test rig to evaluate the friction characteristics of the tested lubricant. For controlled test conditions (speed, contact pressure, oil temperature) and specific number of test cycles, the mean friction coefficient and the friction vs. speed relations are monitored during sliding test. The resultant tribofilms on the tested friction interface surfaces are characterized by means of Scanning Electron Microscopy-Energy Dispersive X-ray spectroscopy (SEM- EDS), Attenuated Total Reflectance -Fourier Transform Infrared Spectroscopy (ATR-FTIR) and X-ray Photoelectron Spectroscopy (XPS analysis). The spectroscopic techniques were used to analyse adsorbed additives on friction interfaces and made it possible to correlate measured data to the specific friction behavior obtained after water contamination of the ATF.

sted, utgiver, år, opplag, sider
2014.
HSV kategori
Forskningsprogram
Maskinelement; Kemisk teknologi
Identifikatorer
URN: urn:nbn:se:ltu:diva-34688Lokal ID: 8f48826e-0d1e-41e7-ace4-2404bb506b13OAI: oai:DiVA.org:ltu-34688DiVA, id: diva2:1007939
Konferanse
Nordic Symposium on Tribology : 10/06/2014 - 13/06/2014
Merknad
Godkänd; 2014; 20140618 (andbra)Tilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2018-04-05bibliografisk kontrollert

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Fatima, NowshirMinami, IchiroHolmgren, AllanMarklund, PärLarsson, Roland

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