Static analysis of exciting force in chain continuously variable transmissions (CVT) with a geometric model
CVT chains have become widely used in vehicles because the slip between parts is very small, which enables efficient power transmission. However, the motion caused by the pins of the CVT chain entering and leaving the pulleys one after another during the power transmission process results in periodi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2018-05-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/84/862/84_17-00543/_pdf/-char/en |
| _version_ | 1797989161755475968 |
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| author | Teruhiko NAKAZAWA Haruhiro HATTORI Ichiro TARUTANI Shinji YASUHARA Tsuyoshi INOUE |
| author_facet | Teruhiko NAKAZAWA Haruhiro HATTORI Ichiro TARUTANI Shinji YASUHARA Tsuyoshi INOUE |
| author_sort | Teruhiko NAKAZAWA |
| collection | DOAJ |
| description | CVT chains have become widely used in vehicles because the slip between parts is very small, which enables efficient power transmission. However, the motion caused by the pins of the CVT chain entering and leaving the pulleys one after another during the power transmission process results in periodic motion of the whole chain. This behavior is known to affect noise and other basic performance aspects of CVTs. Therefore, it is important to study the geometrical specifications of the chain that affect periodic motion, such as the shape and dimensions of the parts. This study aimed to (1) identify the periodic motion that affects noise, and (2) formulate a motional theory to derive the ideal specifications of a CVT chain. First, after measuring the acceleration of the pulleys under conditions that generate large CVT noise, it was found that noise was greatly affected by periodic motion caused by the chordal action of the chain. Based on this result, a mathematical model was proposed to describe this chordal action. The pin profile curve was particularly considered in the model since it determines the motion of the chain at both ends of the chord part and has an important effect on the chordal action. Next, the chordal action of the chain was measured using an accelerometer, and the measured results were compared with the results calculated by the model. The results were consistent, which confirmed the validity of the model. |
| first_indexed | 2024-04-11T08:14:45Z |
| format | Article |
| id | doaj.art-55bb45617d004052bba2a10e1d13b4b6 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:14:45Z |
| publishDate | 2018-05-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-55bb45617d004052bba2a10e1d13b4b62022-12-22T04:35:11ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612018-05-018486217-0054317-0054310.1299/transjsme.17-00543transjsmeStatic analysis of exciting force in chain continuously variable transmissions (CVT) with a geometric modelTeruhiko NAKAZAWA0Haruhiro HATTORI1Ichiro TARUTANI2Shinji YASUHARA3Tsuyoshi INOUE4Toyota Central R&D Labs., Inc.Toyota Central R&D Labs., Inc.Toyota Central R&D Labs., Inc.JTEKT CorporationDepartment of Mechanical Systems Engineering, Nagoya UniversityCVT chains have become widely used in vehicles because the slip between parts is very small, which enables efficient power transmission. However, the motion caused by the pins of the CVT chain entering and leaving the pulleys one after another during the power transmission process results in periodic motion of the whole chain. This behavior is known to affect noise and other basic performance aspects of CVTs. Therefore, it is important to study the geometrical specifications of the chain that affect periodic motion, such as the shape and dimensions of the parts. This study aimed to (1) identify the periodic motion that affects noise, and (2) formulate a motional theory to derive the ideal specifications of a CVT chain. First, after measuring the acceleration of the pulleys under conditions that generate large CVT noise, it was found that noise was greatly affected by periodic motion caused by the chordal action of the chain. Based on this result, a mathematical model was proposed to describe this chordal action. The pin profile curve was particularly considered in the model since it determines the motion of the chain at both ends of the chord part and has an important effect on the chordal action. Next, the chordal action of the chain was measured using an accelerometer, and the measured results were compared with the results calculated by the model. The results were consistent, which confirmed the validity of the model.https://www.jstage.jst.go.jp/article/transjsme/84/862/84_17-00543/_pdf/-char/encontinuously variable transmissioncvtchainbeltvibrationnoisecurve of pin profilegeometric theorygeometry model |
| spellingShingle | Teruhiko NAKAZAWA Haruhiro HATTORI Ichiro TARUTANI Shinji YASUHARA Tsuyoshi INOUE Static analysis of exciting force in chain continuously variable transmissions (CVT) with a geometric model Nihon Kikai Gakkai ronbunshu continuously variable transmission cvt chain belt vibration noise curve of pin profile geometric theory geometry model |
| title | Static analysis of exciting force in chain continuously variable transmissions (CVT) with a geometric model |
| title_full | Static analysis of exciting force in chain continuously variable transmissions (CVT) with a geometric model |
| title_fullStr | Static analysis of exciting force in chain continuously variable transmissions (CVT) with a geometric model |
| title_full_unstemmed | Static analysis of exciting force in chain continuously variable transmissions (CVT) with a geometric model |
| title_short | Static analysis of exciting force in chain continuously variable transmissions (CVT) with a geometric model |
| title_sort | static analysis of exciting force in chain continuously variable transmissions cvt with a geometric model |
| topic | continuously variable transmission cvt chain belt vibration noise curve of pin profile geometric theory geometry model |
| url | https://www.jstage.jst.go.jp/article/transjsme/84/862/84_17-00543/_pdf/-char/en |
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