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Title: Optimisation of piston compression ring for improved energy efficiency of high performance race engines
Authors: Morris, Nicholas J.
Mohammadpour, Mahdi
Rahmani, Ramin
Rahnejat, Homer
Keywords: Piston compression ring
Fuel efficiency
Light weight
Compactness
Multi-objective optimization
Genetic algorithm
Issue Date: 2017
Publisher: SAGE (© the authors)
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, [not yet published].
Abstract: 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.
Description: 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/
Sponsor: 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.
Version: Accepted for publication
DOI: 10.1177/0954407016686249
URI: https://dspace.lboro.ac.uk/2134/23499
Publisher Link: https://doi.org/10.1177/0954407016686249
ISSN: 2041-2991
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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