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Grit Blasting on Synchronizer - To Resolve Early Crashing Complaint
Technical Paper
2017-01-1769
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In today’s automobile market, most OEMs use manual transmission for cars. Gear Shifting is a crucial customer touch point. Any issue or inconvenience caused while shifting gears can result into customer dissatisfaction and will affect the brand image. Synchronizer is a vital subsystem for precise gear shifting mechanism. Based on vehicle application selection of synchronizer for given inertia and speed difference is a key factor which decides overall shift quality of gearbox.
For more demanding driver abuse conditions like skip shifting, conventional brass synchronizers have proved inadequate for required speed difference and gear inertia, which eventually results into synchronizer crashing and affects driving performance. To increase synchronizer performance of multi-cone compact brass synchronizer, a ‘Grit blasting process’ has been added. These components tested with an accelerated test plan successfully.
This paper focuses on synchronizer crashing and its capacity increase by enhancing synchronizer coefficient of friction with the help of addition of grit blasting process. Accelerated testing method and grit blasting process results are found beneficial for future manual synchronizer transmissions.
Citation
Gangvekar, O. and Deshmane, S., "Grit Blasting on Synchronizer - To Resolve Early Crashing Complaint," SAE Technical Paper 2017-01-1769, 2017, https://doi.org/10.4271/2017-01-1769.Data Sets - Support Documents
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References
- Socin , R. and Walters , L. Manual Transmission Synchronizers SAE Technical Paper 680008 1968 10.4271/680008
- Lovas , L. , Play , D. , Marialigeti , J. , and Rigal , J. F. 2006 July Mechanical Behaviour Simulation for Synchromesh Mechanism Improvements Proc. IMechE 220 7 919 945 10.1243/09544070D21604
- Sandooja , A. and Kunal , R. Automotive Synchronizer with Asymetric Toothing SAE Technical Paper 2011-01-0724 2011 10.4271/2011-01-0724
- Back Ottmar Basics of Synchronizers https://www.hoerbiger.com/upload/file/2013_basicsofsynchronizers.pdf January 2013
- Bedmar Ana Pastor Synchronization processes and synchronizer mechanisms in manual transmissions Master’s Thesis in the International Master Programme in Applied Mechanics CHALMERS UNIVERSITY OF TECHNOLOGY Sweden 2013 20
- Sykes , L. The Jaguar XJ220 Triple-Cone Synchronizer A Case Study SAE Technical Paper 940737 1994 10.4271/940737
- Goto , Y. , Yagi , Y. , Morimoto , Y. , and Kawasaki , M. Shift feel in manual transmissions - an analysis of unsmooth shifting and gear clashing JSAE Review 1988 9 4 52 55
- Paffoni , B. , Progri , R. , and Grase , R. The mixed phase of gearbox synchromesh operation Proc. IMechE, Part J: Engineering Tribology 2000 214 157 165
- D’Orazio , A. , Caudano , M. , Uberti , M. , and Urbinati , M. Multicone synchronizer dynamic modelling and experimental bench test rig to improve manual transmission shiftabiltiy Proceedings of the JSME International conference on Motion and Power Transmissions Fukuoka, Japan 15-17 November 2001 649 656