Correlation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing

To improve the transmission efficiency of a continuously variable transmission (CVT) system, it is effective to form a tribofilm with higher friction coefficient. Therefore, understanding of the correlation between the tribofilm formation and friction coefficient in a CVT fluid has been a great deal...

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Autores principales:	Ayako Omura, Atsushi Korenaga, Hiroki Mano, Tsuguyori Ohana, Akira Sugimura, Akira Mizuno, Yoshiyuki Tanaka, Makoto Maeda, Kazumasa Uchida
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2019
Materias:	tribofilm lubricant additives continuously variable transmission boundary lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/123bbf9eb6ce4720bac50ceaa4cba795
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spelling	oai:doaj.org-article:123bbf9eb6ce4720bac50ceaa4cba7952021-11-05T09:17:37ZCorrelation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing1881-219810.2474/trol.14.208https://doaj.org/article/123bbf9eb6ce4720bac50ceaa4cba7952019-11-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/14/4/14_208/_pdf/-char/enhttps://doaj.org/toc/1881-2198To improve the transmission efficiency of a continuously variable transmission (CVT) system, it is effective to form a tribofilm with higher friction coefficient. Therefore, understanding of the correlation between the tribofilm formation and friction coefficient in a CVT fluid has been a great deal. In this study, the tribofilm formation on a bearing steel ball surface under the simulated additive oil was investigated. We used ball-on-disk tribological test and optical microscopy imaging to observe the temporal changes in the tribofilm growth. Atomic force microscopy and energy-dispersive X-ray spectrometry analyses revealed that the tribofilm consisted of pad-like structures derived by tricresyl phosphate and calcium sulfonate additives. A binary imaging analysis showed that the total area of the pad-like structure was a key parameter determining the friction coefficient. The pads were repeatedly desorbed and reformed during the sliding test. These results improve the design of future CVT systems and lubricants.Ayako OmuraAtsushi KorenagaHiroki ManoTsuguyori OhanaAkira SugimuraAkira MizunoYoshiyuki TanakaMakoto MaedaKazumasa UchidaJapanese Society of Tribologistsarticletribofilmlubricant additivescontinuously variable transmissionboundary lubricationPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 14, Iss 4, Pp 208-213 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	tribofilm lubricant additives continuously variable transmission boundary lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	tribofilm lubricant additives continuously variable transmission boundary lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Ayako Omura Atsushi Korenaga Hiroki Mano Tsuguyori Ohana Akira Sugimura Akira Mizuno Yoshiyuki Tanaka Makoto Maeda Kazumasa Uchida Correlation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing
description	To improve the transmission efficiency of a continuously variable transmission (CVT) system, it is effective to form a tribofilm with higher friction coefficient. Therefore, understanding of the correlation between the tribofilm formation and friction coefficient in a CVT fluid has been a great deal. In this study, the tribofilm formation on a bearing steel ball surface under the simulated additive oil was investigated. We used ball-on-disk tribological test and optical microscopy imaging to observe the temporal changes in the tribofilm growth. Atomic force microscopy and energy-dispersive X-ray spectrometry analyses revealed that the tribofilm consisted of pad-like structures derived by tricresyl phosphate and calcium sulfonate additives. A binary imaging analysis showed that the total area of the pad-like structure was a key parameter determining the friction coefficient. The pads were repeatedly desorbed and reformed during the sliding test. These results improve the design of future CVT systems and lubricants.
format	article
author	Ayako Omura Atsushi Korenaga Hiroki Mano Tsuguyori Ohana Akira Sugimura Akira Mizuno Yoshiyuki Tanaka Makoto Maeda Kazumasa Uchida
author_facet	Ayako Omura Atsushi Korenaga Hiroki Mano Tsuguyori Ohana Akira Sugimura Akira Mizuno Yoshiyuki Tanaka Makoto Maeda Kazumasa Uchida
author_sort	Ayako Omura
title	Correlation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing
title_short	Correlation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing
title_full	Correlation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing
title_fullStr	Correlation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing
title_full_unstemmed	Correlation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing
title_sort	correlation between tribofilm formation and friction coefficient in continuously variable transmission at the initial stage of rubbing
publisher	Japanese Society of Tribologists
publishDate	2019
url	https://doaj.org/article/123bbf9eb6ce4720bac50ceaa4cba795
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Correlation between Tribofilm Formation and Friction Coefficient in Continuously Variable Transmission at the Initial Stage of Rubbing

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