Lubricant Additives for Improving the Performance of Metal V-Belt Type CVTs

Lubricants for metal V-belt type CVTs (B-CVTFs) must be able to produce a higher metal-metal friction coefficient and give excellent anti-shudder properties for lock-up clutch used in B-CVTs. This study intends to optimize various kinds of lubricant additive such as anti-wear additive, detergent and...

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Autores principales:	Keiichi Narita, Toshiaki Iwai, Daisuke Takekawa
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2012
Materias:	velt cvt lubricants anti-wear additive friction modifier anti-shudder tribofilms afm 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/52f034ca61de44e79824070c6396653c
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spelling	oai:doaj.org-article:52f034ca61de44e79824070c6396653c2021-11-05T09:24:57ZLubricant Additives for Improving the Performance of Metal V-Belt Type CVTs1881-219810.2474/trol.7.152https://doaj.org/article/52f034ca61de44e79824070c6396653c2012-09-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/7/3/7_152/_pdf/-char/enhttps://doaj.org/toc/1881-2198Lubricants for metal V-belt type CVTs (B-CVTFs) must be able to produce a higher metal-metal friction coefficient and give excellent anti-shudder properties for lock-up clutch used in B-CVTs. This study intends to optimize various kinds of lubricant additive such as anti-wear additive, detergent and friction modifier (FM) for improving these performances of B-CVTs. In addition, contact mode atomic force microscopy was utilized to investigate links between friction performance and the morphology of tribofilms formed from candidate additives. As a result, an additive formulation consisting of a phosphorus additive, calcium detergent and dispersant showed a higher friction coefficient between the metals. The results of the surface analysis on the wear scar indicate that calcium tribofilm species formed fine depositions on the rubbing surface, which might attribute to a higher friction between the metals. Moreover, it is found that a sort of friction modifier gave an excellent anti-shudder performance for wet clutch with keeping higher friction coefficient between the metals, which would result in improving the performance of B-CVTs.Keiichi NaritaToshiaki IwaiDaisuke TakekawaJapanese Society of Tribologistsarticlevelt cvtlubricantsanti-wear additivefriction modifieranti-shuddertribofilmsafmPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 7, Iss 3, Pp 152-158 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	velt cvt lubricants anti-wear additive friction modifier anti-shudder tribofilms afm Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	velt cvt lubricants anti-wear additive friction modifier anti-shudder tribofilms afm Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Keiichi Narita Toshiaki Iwai Daisuke Takekawa Lubricant Additives for Improving the Performance of Metal V-Belt Type CVTs
description	Lubricants for metal V-belt type CVTs (B-CVTFs) must be able to produce a higher metal-metal friction coefficient and give excellent anti-shudder properties for lock-up clutch used in B-CVTs. This study intends to optimize various kinds of lubricant additive such as anti-wear additive, detergent and friction modifier (FM) for improving these performances of B-CVTs. In addition, contact mode atomic force microscopy was utilized to investigate links between friction performance and the morphology of tribofilms formed from candidate additives. As a result, an additive formulation consisting of a phosphorus additive, calcium detergent and dispersant showed a higher friction coefficient between the metals. The results of the surface analysis on the wear scar indicate that calcium tribofilm species formed fine depositions on the rubbing surface, which might attribute to a higher friction between the metals. Moreover, it is found that a sort of friction modifier gave an excellent anti-shudder performance for wet clutch with keeping higher friction coefficient between the metals, which would result in improving the performance of B-CVTs.
format	article
author	Keiichi Narita Toshiaki Iwai Daisuke Takekawa
author_facet	Keiichi Narita Toshiaki Iwai Daisuke Takekawa
author_sort	Keiichi Narita
title	Lubricant Additives for Improving the Performance of Metal V-Belt Type CVTs
title_short	Lubricant Additives for Improving the Performance of Metal V-Belt Type CVTs
title_full	Lubricant Additives for Improving the Performance of Metal V-Belt Type CVTs
title_fullStr	Lubricant Additives for Improving the Performance of Metal V-Belt Type CVTs
title_full_unstemmed	Lubricant Additives for Improving the Performance of Metal V-Belt Type CVTs
title_sort	lubricant additives for improving the performance of metal v-belt type cvts
publisher	Japanese Society of Tribologists
publishDate	2012
url	https://doaj.org/article/52f034ca61de44e79824070c6396653c
work_keys_str_mv	AT keiichinarita lubricantadditivesforimprovingtheperformanceofmetalvbelttypecvts AT toshiakiiwai lubricantadditivesforimprovingtheperformanceofmetalvbelttypecvts AT daisuketakekawa lubricantadditivesforimprovingtheperformanceofmetalvbelttypecvts
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Lubricant Additives for Improving the Performance of Metal V-Belt Type CVTs

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