Prediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling

In the automotive industry one of the crucial issues is reduction of CO2 emission to protect environment. A lot of researches have been done to reduce the CO2 emission of cars by improving efficiency of engine and engine parts or lowering the weight. However, a significant reduction of CO2 emission...

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Autores principales:	Shahjada Ahmed Pahlovy, Syeda Faria Mahmud, Masamitsu Kubota, Makoto Ogawa, Norio Takakura
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2016
Materias:	low emission drag torque characte wet clutch automatic transmission analytical model 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/f4d0a6ae356d40078d77660722058516
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spelling	oai:doaj.org-article:f4d0a6ae356d40078d776607220585162021-11-05T09:21:40ZPrediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling1881-219810.2474/trol.11.121https://doaj.org/article/f4d0a6ae356d40078d776607220585162016-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/11/2/11_121/_pdf/-char/enhttps://doaj.org/toc/1881-2198In the automotive industry one of the crucial issues is reduction of CO2 emission to protect environment. A lot of researches have been done to reduce the CO2 emission of cars by improving efficiency of engine and engine parts or lowering the weight. However, a significant reduction of CO2 emission of cars can also be obtained from improvement of efficiency of transmission by reducing drag torque or spin loss in disengaged wet clutch. The reduction of drag torque can be achieved by introducing groove on facing of clutch disk and further reduction can be obtained by optimizing the shape of groove. Generally, the optimum shape of groove is decided by trial and error method which requires time, making sample, conducting a lot of tests and wasting a lot of raw materials. In this research, we proposed a new analytical model to predict the drag torque characteristics of a disengaged wet clutch of transmission without making any samples and performing any tests. The feature of the model: It bases on continuity and Navier-Stokes equation, a real time visualization investigation and laminar flow. The model is validated with tests results and the comparison result shows that they are very close to each other. The significance of the model is: it captures the multiphase drag torque characteristic which changes with changing gaps, speeds and oil flow rates. Moreover, the model is a green environment friendly tool to estimate drag torque characteristics without making any samples or conducting any drag tests.Shahjada Ahmed PahlovySyeda Faria MahmudMasamitsu KubotaMakoto OgawaNorio TakakuraJapanese Society of Tribologistsarticlelow emissiondrag torque charactewet clutchautomatic transmissionanalytical modelPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 11, Iss 2, Pp 121-129 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	low emission drag torque characte wet clutch automatic transmission analytical model Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	low emission drag torque characte wet clutch automatic transmission analytical model Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Shahjada Ahmed Pahlovy Syeda Faria Mahmud Masamitsu Kubota Makoto Ogawa Norio Takakura Prediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling
description	In the automotive industry one of the crucial issues is reduction of CO2 emission to protect environment. A lot of researches have been done to reduce the CO2 emission of cars by improving efficiency of engine and engine parts or lowering the weight. However, a significant reduction of CO2 emission of cars can also be obtained from improvement of efficiency of transmission by reducing drag torque or spin loss in disengaged wet clutch. The reduction of drag torque can be achieved by introducing groove on facing of clutch disk and further reduction can be obtained by optimizing the shape of groove. Generally, the optimum shape of groove is decided by trial and error method which requires time, making sample, conducting a lot of tests and wasting a lot of raw materials. In this research, we proposed a new analytical model to predict the drag torque characteristics of a disengaged wet clutch of transmission without making any samples and performing any tests. The feature of the model: It bases on continuity and Navier-Stokes equation, a real time visualization investigation and laminar flow. The model is validated with tests results and the comparison result shows that they are very close to each other. The significance of the model is: it captures the multiphase drag torque characteristic which changes with changing gaps, speeds and oil flow rates. Moreover, the model is a green environment friendly tool to estimate drag torque characteristics without making any samples or conducting any drag tests.
format	article
author	Shahjada Ahmed Pahlovy Syeda Faria Mahmud Masamitsu Kubota Makoto Ogawa Norio Takakura
author_facet	Shahjada Ahmed Pahlovy Syeda Faria Mahmud Masamitsu Kubota Makoto Ogawa Norio Takakura
author_sort	Shahjada Ahmed Pahlovy
title	Prediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling
title_short	Prediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling
title_full	Prediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling
title_fullStr	Prediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling
title_full_unstemmed	Prediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling
title_sort	prediction of drag torque in a disengaged wet clutch of automatic transmission by analytical modeling
publisher	Japanese Society of Tribologists
publishDate	2016
url	https://doaj.org/article/f4d0a6ae356d40078d77660722058516
work_keys_str_mv	AT shahjadaahmedpahlovy predictionofdragtorqueinadisengagedwetclutchofautomatictransmissionbyanalyticalmodeling AT syedafariamahmud predictionofdragtorqueinadisengagedwetclutchofautomatictransmissionbyanalyticalmodeling AT masamitsukubota predictionofdragtorqueinadisengagedwetclutchofautomatictransmissionbyanalyticalmodeling AT makotoogawa predictionofdragtorqueinadisengagedwetclutchofautomatictransmissionbyanalyticalmodeling AT noriotakakura predictionofdragtorqueinadisengagedwetclutchofautomatictransmissionbyanalyticalmodeling
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Prediction of Drag Torque in a Disengaged Wet Clutch of Automatic Transmission by Analytical Modeling

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