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Optimisation of piston compression ring for improved energy efficiency of high performance race engines

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journal contribution
posted on 16.12.2016, 11:06 by Nick Morris, Mahdi Mohammadpour, Ramin Rahmani, Homer Rahnejat
The primary function of the piston compression ring is to seal the combustion chamber from the bottom end of the engine. As a result its conformance to the cylinder liner surface is of prime importance. This close contact contiguity results in increased friction, making this contact conjunction responsible for a significant proportion of energy losses. The frictional losses can be as much of 2-6% of expended fuel energy, which is quite significant for such a diminutive contact. Under these conditions, geometrical profile, surface topography and inertial properties of the ring assume significant importance. The paper presents an integrated mixed-hydrodynamic analysis of the compression ring-cylinder liner contact with multi-parameter optimisation, based on the use of genetic algorithm. The multi-objective functionality includes minimisation of parasitic energy loss, reduction of incidence of asperity level interactions as well as minimisation of ring mass. Both cold and hot running engine conditions in line with the New European Drive Cycle have been considered. Hitherto, such an approach has not been reported in literature.

Funding

The authors would like to express their thanks to the Engineering and Sciences Research Council (EPSRC) for the sponsorship of the Encyclopaedic Program Grant, under its auspices the reported research was carried out.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

Citation

MORRIS, N. ... et al., 2017. Optimisation of piston compression ring for improved energy efficiency of high performance race engines. Proceedings of the Institution of Mechanical Engineers. Part D, Journal of Automobile Engineering, 231(13), pp.1806-1817.

Publisher

SAGE (© the authors)

Version

AM (Accepted Manuscript)

Publisher statement

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

Publication date

2017

Notes

This is an Open Access Article. It is published by Sage under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

ISSN

2041-2991

eISSN

0954-4070

Language

en

Licence

Exports