Synchroniser modeling with application specific to the dual clutch transmission

Walker, PD; Zhang, N; Tamba, RT; Fitzgerald, SP

Synchroniser modeling with application specific to the dual clutch transmission

Walker, PD

Zhang, N

Tamba, RT Fitzgerald, SP

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Publisher:: University of Canterbury, Christchurch, New Zealand
Publication Type:: Conference Proceeding
Citation:: Proceedings of the 13th Asia-Pacific Vibration Conference (APVC 09), 2009, pp. 1 - 10
Issue Date:: 2009-01

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Field	Value	Language
dc.contributor.author	Walker, PD https://orcid.org/0000-0003-3988-3966	en_US
dc.contributor.author	Zhang, N https://orcid.org/0000-0001-6408-0044	en_US
dc.contributor.author	Tamba, RT	en_US
dc.contributor.author	Fitzgerald, SP	en_US
dc.contributor.editor	Committee, CT	en_US
dc.date	2009-11-22	en_US
dc.date.issued	2009-01	en_US
dc.identifier.citation	Proceedings of the 13th Asia-Pacific Vibration Conference (APVC 09), 2009, pp. 1 - 10	en_US
dc.identifier.isbn	978-0-473-16050-0	en_US
dc.identifier.uri	http://hdl.handle.net/10453/11078
dc.description.abstract	The synchromesh type synchroniser has been introduced to dual clutch transmission applications for gear selection prior to shifting. Historical research into this type of mechanism has targeted the application to manual transmission systems only. Such work targets the phenomena associated with driver feel such as shift effort and âdouble bumpâ . Now automated, the control of the synchroniser is less concerned with such aspects of the actuation, focus not trends towards repeatability of the process as well as speed of engagement. The actuation of this type of mechanism relies on the balancing of torques derived from engagement chamfers, the cone clutch and losses experienced in the transmission. These torques affect the displacement of sleeve, asynchronisation of the target gear, as well as the unblocking of synchroniser ring and indexing of the gear to the locked position. Thus a simplified model of the synchroniser mechanism and associated gear is developed for the purpose of simulating its operation in a dual clutch transmission. Unlike similar simulations this model targets the actuation of the mechanism using input forces from the controller, rather than using the control of sleeve displacement to determine maximum forces experience by the driver. To assess how operating characteristics have varied the mechanism has been modelled in the MatlabÂ® environment. This paper presents the techniques used to model the mechanism, including the governing principles of synchroniser actuation and drag torque. Simulation results demonstrate that the primary variation in the mechanism is through the indexing chamfers. Additionally the influence of temperature variation is demonstrated for a fifth gear upshift, and the detrimental effects of cold starts demonstrated.	en_US
dc.publisher	University of Canterbury, Christchurch, New Zealand	en_US
dc.relation.ispartof	Proceedings of the 13th Asia-Pacific Vibration Conference (APVC 09)	en_US
dc.relation.ispartof	Asia Pacific Vibration Conference	en_US
dc.title	Synchroniser modeling with application specific to the dual clutch transmission	en_US
dc.type	Conference Proceeding
utslib.location	New Zealand	en_US
utslib.location.activity	Christchurch, New Zealand	en_US
utslib.for	091304 Dynamics, Vibration and Vibration Control	en_US
dc.location.activity	Christchurch, New Zealand	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access
pubs.consider-herdc	true	en_US
pubs.place-of-publication	New Zealand	en_US
pubs.start-date	2009-11-22	en_US

Abstract:

The synchromesh type synchroniser has been introduced to dual clutch transmission applications for gear selection prior to shifting. Historical research into this type of mechanism has targeted the application to manual transmission systems only. Such work targets the phenomena associated with driver feel such as shift effort and âdouble bumpâ . Now automated, the control of the synchroniser is less concerned with such aspects of the actuation, focus not trends towards repeatability of the process as well as speed of engagement. The actuation of this type of mechanism relies on the balancing of torques derived from engagement chamfers, the cone clutch and losses experienced in the transmission. These torques affect the displacement of sleeve, asynchronisation of the target gear, as well as the unblocking of synchroniser ring and indexing of the gear to the locked position. Thus a simplified model of the synchroniser mechanism and associated gear is developed for the purpose of simulating its operation in a dual clutch transmission. Unlike similar simulations this model targets the actuation of the mechanism using input forces from the controller, rather than using the control of sleeve displacement to determine maximum forces experience by the driver. To assess how operating characteristics have varied the mechanism has been modelled in the MatlabÂ® environment. This paper presents the techniques used to model the mechanism, including the governing principles of synchroniser actuation and drag torque. Simulation results demonstrate that the primary variation in the mechanism is through the indexing chamfers. Additionally the influence of temperature variation is demonstrated for a fifth gear upshift, and the detrimental effects of cold starts demonstrated.

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http://hdl.handle.net/10453/11078