Development of Fluids for Chain Type CVTs

In the area of transmissions, continuously variable transmissions (CVTs) have been adopted for cars with various engine displacements mainly in Japan and North America because of their better fuel economy and smooth shift feeling. Continuously variable transmission fluids (CVTFs) with lower viscosit...

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Autores principales:	Toshiaki Iwai, Keiichi Narita, Mitsugu Kudo, Masato Ogawa
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2017
Materias:	chain cvtf afm metal friction clutch friction anti-seizure property 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/e5a090a545d44cf590eee0fc298552f4
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spelling	oai:doaj.org-article:e5a090a545d44cf590eee0fc298552f42021-11-05T09:20:26ZDevelopment of Fluids for Chain Type CVTs1881-219810.2474/trol.12.147https://doaj.org/article/e5a090a545d44cf590eee0fc298552f42017-07-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/12/3/12_147/_pdf/-char/enhttps://doaj.org/toc/1881-2198In the area of transmissions, continuously variable transmissions (CVTs) have been adopted for cars with various engine displacements mainly in Japan and North America because of their better fuel economy and smooth shift feeling. Continuously variable transmission fluids (CVTFs) with lower viscosity and optimal friction property for chain and pulley will be effective for improving fuel saving performance in CVT. In this study, compared with a market chain CVTF, the developed oil had a lower viscosity, a higher metal friction coefficient, and higher clutch transmission capacity, while its anti-seizure property was better than a market chain CVTF. As to higher metal friction coefficient, small islands were observed on friction surface by atomic force microscopy (AFM) .It is supposed that those islands promote a shift to the boundary lubrication regime, contributing to a higher friction coefficient. The developed oil containing some additives demonstrated 10% higher variator torque capacity compared with a commercial CVTF.Toshiaki IwaiKeiichi NaritaMitsugu KudoMasato OgawaJapanese Society of Tribologistsarticlechain cvtfafmmetal frictionclutch frictionanti-seizure propertyPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 12, Iss 3, Pp 147-150 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	chain cvtf afm metal friction clutch friction anti-seizure property Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	chain cvtf afm metal friction clutch friction anti-seizure property Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Toshiaki Iwai Keiichi Narita Mitsugu Kudo Masato Ogawa Development of Fluids for Chain Type CVTs
description	In the area of transmissions, continuously variable transmissions (CVTs) have been adopted for cars with various engine displacements mainly in Japan and North America because of their better fuel economy and smooth shift feeling. Continuously variable transmission fluids (CVTFs) with lower viscosity and optimal friction property for chain and pulley will be effective for improving fuel saving performance in CVT. In this study, compared with a market chain CVTF, the developed oil had a lower viscosity, a higher metal friction coefficient, and higher clutch transmission capacity, while its anti-seizure property was better than a market chain CVTF. As to higher metal friction coefficient, small islands were observed on friction surface by atomic force microscopy (AFM) .It is supposed that those islands promote a shift to the boundary lubrication regime, contributing to a higher friction coefficient. The developed oil containing some additives demonstrated 10% higher variator torque capacity compared with a commercial CVTF.
format	article
author	Toshiaki Iwai Keiichi Narita Mitsugu Kudo Masato Ogawa
author_facet	Toshiaki Iwai Keiichi Narita Mitsugu Kudo Masato Ogawa
author_sort	Toshiaki Iwai
title	Development of Fluids for Chain Type CVTs
title_short	Development of Fluids for Chain Type CVTs
title_full	Development of Fluids for Chain Type CVTs
title_fullStr	Development of Fluids for Chain Type CVTs
title_full_unstemmed	Development of Fluids for Chain Type CVTs
title_sort	development of fluids for chain type cvts
publisher	Japanese Society of Tribologists
publishDate	2017
url	https://doaj.org/article/e5a090a545d44cf590eee0fc298552f4
work_keys_str_mv	AT toshiakiiwai developmentoffluidsforchaintypecvts AT keiichinarita developmentoffluidsforchaintypecvts AT mitsugukudo developmentoffluidsforchaintypecvts AT masatoogawa developmentoffluidsforchaintypecvts
_version_	1718444441507725312

Development of Fluids for Chain Type CVTs

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