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An investigation into the oil transport and starvation of piston-ring pack

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journal contribution
posted on 13.03.2018 by Rickie Bewsher, Mahdi Mohammadpour, Homer Rahnejat, Gunter Offner, O. Knaus
In order to accurately predict the lubricant film thickness and generated friction in any tribological contact, it is important to determine appropriate boundary conditions, taking into account the oil availability and extent of starvation. This paper presents a two-dimensional hydrodynamic model of a piston ring pack for prediction of lubricant film thickness, friction and total power loss. The model takes into account starvation caused by reverse flow at the conjunctional inlet wedge, and applied to a ring-pack, comprising a compression and scraper ring. Inlet boundaries are calculated for an engine cycle of a 4-cylinder, 4-stroke gasoline engine operating at 1500rpm with conditions pertaining to the New European Drive Cycle (NEDC). The analysis shows that the two main sources of starvation; firstly due to a physical lack of inlet meniscus and secondly due to reverse flow at the inlet wedge, significantly affect the prevailing conditions from the generally assumed idealised boundary conditions. Such an approach has not hitherto been reported in literature.

Funding

The authors would like to express their gratitude to the Engineering and Physical Sciences Research Council (EPSRC) and AVL List for the financial and technical support extended to this research.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology

Citation

BEWSHER, S.R. ...et al., 2018. An investigation into the oil transport and starvation of piston-ring pack. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 233(1), pp. 112-124.

Publisher

SAGE Publications Ltd (© The authors)

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Acceptance date

02/03/2018

Publication date

2018

Notes

This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

ISSN

2041-305X

Language

en

Licence

Exports