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Influence of a bellows-type flexible joint on exhaust system dynamics
Responsible organisation
2004 (English)In: Proceedings of the Institution of mechanical engineers. Part D, journal of automobile engineering, ISSN 0954-4070, Vol. 218, no 12, 1473-1478 p.Article in journal (Refereed) Published
Abstract [en]

Most modern cars have a bellows-type flexible joint between the manifold and the catalytic converter to allow for thermal expansion and to decouple large engine movements and vibrations from the rest of the exhaust system. To obtain better understanding of the influence of this joint, the dynamic response of a typical exhaust system is studied when excited via different joint configurations. Measurements show the great order of reduction of vibration transmission to the exhaust system that a bellows joint, with and without an inside liner, gives in comparison with a stiff joint. For the combined bellows and liner joint vibration transmission is however higher than for the bellows alone. Together with some other aspects this makes the choice of including a liner in the exhaust system application complex. For a system in general the possibility of tuning the friction limit of the liner, to minimise overall vibrations through friction based damping, depends on how close to ideal the excitation source is and its location. Anyhow, the combined bellows and liner joint makes the exhaust system behaviour significantly non-linear, whereas the system behaviour proves to be essentially linear when the bellows has no liner, which imply that the liner needs to be included in theoretical models when present in the real system.

Place, publisher, year, edition, pages
Professional Engineering Publishing , 2004. Vol. 218, no 12, 1473-1478 p.
Keyword [en]
Bellows, Dynamics, Exhaust system, Experimental investigation, Flexible joint, Vibration transmission
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:bth-9438ISI: 000228672000009Local ID: oai:bth.se:forskinfoE3559A610B4C8F3AC125707B002BFB6EOAI: oai:DiVA.org:bth-9438DiVA: diva2:837285
Available from: 2012-09-18 Created: 2005-09-13 Last updated: 2015-06-30Bibliographically approved

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Wall, JohanBroman, Göran
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CiteExportLink to record
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Citation style
  • apa
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  • vancouver
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More styles
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  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • asciidoc
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