Friction model of a marine diesel engine piston assembly

Livanos, GA; Kyrtatos, NP

dc.contributor.author	Livanos, GA	en
dc.contributor.author	Kyrtatos, NP	en
dc.date.accessioned	2014-03-01T01:26:23Z
dc.date.available	2014-03-01T01:26:23Z
dc.date.issued	2007	en
dc.identifier.issn	0301-679X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18048
dc.subject	Engines	en
dc.subject	Friction	en
dc.subject	Piston	en
dc.subject	Piston rings	en
dc.subject	Piston secondary motion	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Diesel engines	en
dc.subject.other	Friction	en
dc.subject.other	Lubricants	en
dc.subject.other	Marine engines	en
dc.subject.other	Piston rings	en
dc.subject.other	Marine diesel engines	en
dc.subject.other	Mechanical efficiency	en
dc.subject.other	Piston secondary motion	en
dc.subject.other	Rotational speed	en
dc.subject.other	Engine pistons	en
dc.title	Friction model of a marine diesel engine piston assembly	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.triboint.2007.01.020	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.triboint.2007.01.020	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	In modern marine diesel engines, power output and in-cylinder firing pressures are constantly increasing, leading to higher friction in engine components and especially in the piston assembly. A good understanding of the friction contributions of the various engine components is needed, if mechanical efficiency is to be improved. A friction model for the engine piston assembly has been developed and is presented in this paper. The model, based on lubrication theory, considers the detailed engine geometry and the complete lubricant action, and thus can be applied to a wide range of engines. In detail, the analysis takes into account the friction components of compression rings, oil control rings, piston skirt and gudgeon pin of the engine piston assembly. The model was applied to a four-stroke (medium speed) marine diesel engine and the effect of engine speed and load on friction was examined and compared with results from other semi-empirical models. The engine friction was predicted at constant rotational speed (generator operation) and variable rotational speed (propulsion operation). (C) 2007 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Tribology International	en
dc.identifier.doi	10.1016/j.triboint.2007.01.020	en
dc.identifier.isi	ISI:000249878100005	en
dc.identifier.volume	40	en
dc.identifier.issue	10-12 SPEC. ISS.	en
dc.identifier.spage	1441	en
dc.identifier.epage	1453	en