Onumata, Y, Zhao, H, Wang, C et al. (2 more authors) (2018) Interactive Effect between Organic Friction Modifiers and Additives on Friction at Metal Pushing V-Belt CVT Components. Tribology Transactions, 61 (3). pp. 474-481. ISSN 1040-2004
Abstract
The interactions between organic friction modifiers (FMs) and other additives in a continuously variable transmission (CVT) fluid (CVTF) are investigated with the goal of optimizing friction management of metal pushing V-belt CVTs. Three types of FMs (oleic acid, oleyl alcohol, and glycerol mono-oleate [GMO]) were formulated in poly-α-olefin (PAO) and a fully formulated CVTF, and the friction performance was evaluated in a reciprocating test apparatus (TE77). To estimate their effect on the major frictional components in the CVTs, a steel belt–pulley and a torque converter clutch, the tribotests were carried out with both steel–steel and paper–steel sliding configurations. Then, the posttest materials were assessed by surface analysis techniques to observe the chemical nature of any reacted layers at the surface.
The results indicate that the friction on the steel surface was significantly influenced by a combination of the FMs and the CVTF additives as well as the functional group of the FMs. Although oleic acid and GMO typically present greater friction reduction than oleyl alcohol under most conditions, oleic acid did not decrease friction at the steel–steel contact with the presence of the other additives in the CVTF formulation; the friction reduction effect was impaired by the presence of other additives. Surface analysis of the posttest specimens implied that it was interactions with the calcium detergent that inactivated the FM effect of oleic acid.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Society of Tribologists and Lubrication Engineers. This is an Accepted Manuscript of an article published by Taylor & Francis in Tribology Transactions on 24 Jul 2017, available online: http://www.tandfonline.com/10.1080/10402004.2017.1355502. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Friction modifiers; continuously variable transmissions (CVTs); automatic transmission fluids |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Functional Surfaces (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 26 Sep 2017 09:00 |
Last Modified: | 08 Oct 2018 08:53 |
Status: | Published |
Publisher: | Taylor & Francis |
Identification Number: | 10.1080/10402004.2017.1355502 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:121642 |