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The Influence of Lubricant Degradation on Measured Piston Ring Film Thickness in a Fired Gasoline Reciprocating Engine

Yes / A laser induced fluorescence system has been developed to visualise the oil film thickness between
the piston ring and cylinder wall of a fired gasoline engine via a small optical window mounted in the
cylinder wall. A fluorescent dye was added to the lubricant in the sump to allow the lubricant to
fluoresce when absorbing laser radiation. The concentration of the dye did not disturb the lubricant
chemistry or its performance. Degraded engine oil samples were used to investigate the influence of
lubricant quality on ring pack lubricant film thickness measurements. The results show significant
differences in the lubricant film thickness profiles for the ring pack when the lubricant degrades which
will affect ring pack friction and ultimately fuel economy.

Identiferoai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/16583
Date19 August 2018
CreatorsNotay, Rai S., Priest, Martin, Fox, M.F.
Source SetsBradford Scholars
LanguageEnglish
Detected LanguageEnglish
TypeArticle, Accepted manuscript
Rights(c) 2019 Elsevier. This article is distributed under the Creative Commons CC-BY-NC-ND license., CC-BY-NC-ND

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