Tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication

Fuel efficiency is the main IC engine attribute, with the compression ring-bore contact consuming nearly 5% of the fuel energy. Analyses are often idealised, such as isothermal condition and smooth surfaces, the former being particularly contrary to practice. An analytic solution to the average flow...

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Bibliographic Details
Main Authors:	Nick Morris, Ramin Rahmani, Homer Rahnejat, Paul King, Brian Fitzsimons
Format:	Default Article
Published:	2013
Subjects:	Mechanical engineering not elsewhere classified Piston ring Mixed lubrication Friction Heat Mechanical Engineering not elsewhere classified Mechanical Engineering
Online Access:	https://hdl.handle.net/2134/11868
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id	rr-article-9569912
record_format	Figshare
spelling	rr-article-95699122013-01-01T00:00:00Z Tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication Nick Morris (1256529) Ramin Rahmani (1250418) Homer Rahnejat (1247550) Paul King (1247412) Brian Fitzsimons (7206908) Mechanical engineering not elsewhere classified Piston ring Mixed lubrication Friction Heat Mechanical Engineering not elsewhere classified Mechanical Engineering Fuel efficiency is the main IC engine attribute, with the compression ring-bore contact consuming nearly 5% of the fuel energy. Analyses are often idealised, such as isothermal condition and smooth surfaces, the former being particularly contrary to practice. An analytic solution to the average flow model is presented for this contact with a new analytical thermal model. The generated contact temperatures, particularly at the inlet result in thinner films than the idealised analyses. For the simulated city driving condition the power loss is mainly due to viscous shear under cold engine condition, whilst for a hot engine boundary friction dominates. 2013-01-01T00:00:00Z Text Journal contribution 2134/11868 https://figshare.com/articles/journal_contribution/Tribology_of_piston_compression_ring_conjunction_under_transient_thermal_mixed_regime_of_lubrication/9569912 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Mechanical engineering not elsewhere classified Piston ring Mixed lubrication Friction Heat Mechanical Engineering not elsewhere classified Mechanical Engineering
spellingShingle	Mechanical engineering not elsewhere classified Piston ring Mixed lubrication Friction Heat Mechanical Engineering not elsewhere classified Mechanical Engineering Nick Morris Ramin Rahmani Homer Rahnejat Paul King Brian Fitzsimons Tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication
description	Fuel efficiency is the main IC engine attribute, with the compression ring-bore contact consuming nearly 5% of the fuel energy. Analyses are often idealised, such as isothermal condition and smooth surfaces, the former being particularly contrary to practice. An analytic solution to the average flow model is presented for this contact with a new analytical thermal model. The generated contact temperatures, particularly at the inlet result in thinner films than the idealised analyses. For the simulated city driving condition the power loss is mainly due to viscous shear under cold engine condition, whilst for a hot engine boundary friction dominates.
format	Default Article
author	Nick Morris Ramin Rahmani Homer Rahnejat Paul King Brian Fitzsimons
author_facet	Nick Morris Ramin Rahmani Homer Rahnejat Paul King Brian Fitzsimons
author_sort	Nick Morris (1256529)
title	Tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication
title_short	Tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication
title_full	Tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication
title_fullStr	Tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication
title_full_unstemmed	Tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication
title_sort	tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication
publishDate	2013
url	https://hdl.handle.net/2134/11868
_version_	1797468975242674176

Tribology of piston compression ring conjunction under transient thermal mixed regime of lubrication

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