Release bearing characteristic of diaphragm spring under dynamical condition

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dc.authorid0000-0003-3350-1509en_US
dc.contributor.authorKaraduman, A.
dc.contributor.authorLekesiz, Hüseyin
dc.contributor.authorYildiz, A.
dc.date.accessioned2021-03-20T20:26:59Z
dc.date.available2021-03-20T20:26:59Z
dc.date.issued2019
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Makine Mühendisliği Bölümüen_US
dc.description20th SAE Asia-Pacific Automotive Engineering Conference: Next Revolution in Automotive Industry, APAC 2019 -- 1 April 2019 through 4 April 2019 -- -- 146986en_US
dc.description.abstractDiaphragm spring design has a critical importance on engagement and disengagement mechanism for a clutch system. The release bearing load characteristic of diaphragm springs determines the quality of disengagement. Release bearing load may change significantly especially under dynamic conditions compared to static conditions. For instance, a significant drop in release bearing load may be experienced under high engine velocities. This is an undesirable situation in terms of clutch performance. Drop in release bearing load may cause not to be transmitting reliably torque from engine to gearbox since minimum release bearing load is not ensured. Drop in release bearing load increases incrementally in proportion to the engine speed increase. This problem has not been addressed in technical literature. Therefore, new design of diaphragm spring becomes necessary to avoid weakening of clutch performance as the engine speed increases which leads to highly dynamic conditions. In this study, the effect of some design parameters for diaphragm springs such as outer radius and embossing are investigated using nonlinear finite element modeling. Three different outer radius with and without embossing were analyzed under boundary conditions representing actual diaphragm tests. Based on the results of FEA, it is concluded that unwanted load drops increases as the outer radius increases while embossing also leads to higher load drop. On the other hand, embossing increases the stiffness of diaphragm fingers and therefore a smaller deformation and a more long-lasting clutch load performance. As a result, an optimum design is required as the diaphragm outer radius increases for a robust disengagement behavior. © 2019 SAE International. All Rights Reserved.en_US
dc.description.sponsorship3151259en_US
dc.description.sponsorshipThe authors gratefully acknowledge the support of Turkish Technology and Science Minister under grant Teydeb 1505 project 3151259 ongoing with collaboration between Bursa Technical University and Valeo Company in Turkey.en_US
dc.identifier.doi10.4271/2019-01-1424en_US
dc.identifier.issn0148-7191
dc.identifier.issueMarchen_US
dc.identifier.scopus2-s2.0-85064663843en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.urihttp://doi.org/10.4271/2019-01-1424
dc.identifier.urihttps://hdl.handle.net/20.500.12885/1387
dc.identifier.volume2019-Marchen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorLekesiz, Hüseyin
dc.language.isoenen_US
dc.publisherSAE Internationalen_US
dc.relation.ispartofSAE Technical Papersen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subject[No Kerywords]en_US
dc.titleRelease bearing characteristic of diaphragm spring under dynamical conditionen_US
dc.typeConference Objecten_US

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