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Study The Transverse Vibration In A Pushrod Of A Diesel Engine Valvetrain Using Contact Element In Flexible Multibody Dynamics
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2012 (English)In: Proceedings Of The ASME International Mechanical Engineering Congress And Exposition 2010, Vol 3, Pts A And B, ASME Press, 2012, 121-126 p.Conference paper (Refereed)
Abstract [en]

Dynamic simulations of the engine valvetrain and detailed studies on the operating mechanisms have long been a centre of attention. In heavy duty diesel engines, heavier valvetrain parts lead to higher inertia force. On the other hand, the opening and closing of valves is very fast and high overlap in Valves lifts and necessity for increase the exhaust and inlet valve opening time by dwelling, individuates cam design basis of these engines, which cause to increase in inertia forces. A common practice in valvetrain dynamic analysis is to use rigid multibody dynamics model. However, some assumptions are to be considered to simplify the model, especially in attachments and joints. In this paper, an under development heavy duty medium speed diesel engine valvetrain system has been studied. The valvetrain mechanism has been modeled using ADAMS commercial software. The flexible valvetrain parts have been considered by means of Component Mode Synthesis (CMS) method. Instead of using simple joint assumption of rigid multibody dynamics model, contact has been employed to study the exact interaction between each two parts. In this method the clearances in the system could easily considered. The dynamic behavior of valvetrain has been investigated and the forces for the parts have been obtained and compared with rigid multibody dynamics model.

Place, publisher, year, edition, pages
ASME Press, 2012. 121-126 p.
Keyword [en]
Commercial software, Component mode synthesis, Flexible multi-body dynamics, Heavy-duty diesel engine, Medium speed diesel engine, Multibody dynamics model, Operating mechanism, Transverse vibrations
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-124743DOI: 10.1115/IMECE2010-39894ISI: 000320286400016ScopusID: 2-s2.0-84881408681ISBN: 978-0-7918-4427-4OAI: diva2:638560
ASME 2010 International Mechanical Engineering Congress and Exposition, IMECE 2010; Vancouver, BC; Canada; 12 November 2010 through 18 November 2010

QC 20130731

Available from: 2013-07-31 Created: 2013-07-29 Last updated: 2014-08-19Bibliographically approved

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Mehrgou, Mehdi
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Aeronautical and Vehicle Engineering
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