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Assessment of friction from compression ring conjunction of a high performance internal combustion engine: a combined numerical and experimental study

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journal contribution
posted on 07.08.2015 by Michael Gore, Ramin Rahmani, Homer Rahnejat, Paul King
The paper presents direct measurement of in-cylinder friction from a single cylinder motocross race engine under motored conditions and compares the same with a new analytical predictive method. These conditions are encountered in piston-cylinder system with the application of cylinder deactivation (CDA) technology, which is a growing trend. The analytical method takes into account the various regions within instantaneous contact of compression ring-cylinder liner, including lubricant film rupture, cavitation zone and the subsequent lubricant film reformation. The analysis also includes the effect of boundary friction and lubricant rheology. The predictions and direct measurements of cyclic friction show good agreement and indicate dominance of viscous friction under the investigated engine running conditions. In particular, it is shown that the compression ring contribution to in-cycle friction is most pronounced in the region of high cylinder pressures because of combined Poiseuille friction and some boundary solid interactions. The combined experimental-analytical 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) for the sponsorship of this research under the Encyclopaedic Program Grant (www.encyclopaedic.org).

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science

Pages

1 - 13 (13)

Citation

GORE, M. ...et al., 2015. Assessment of friction from compression ring conjunction of a high performance internal combustion engine: a combined numerical and experimental study. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 230 (12), pp.2073-2085

Publisher

SAGE Publications/© IMechE 2015

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/

Publication date

2015

Notes

This is an Open Access article licensed under a Creative Commons Attribution 3.0 Unported Licence.

ISSN

2041-2983

Language

en

Licence

Exports