FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1995710063> ?p ?o ?g. }

• W1995710063 abstract "The exhaust valve system of combustion engines experiences a very complex contact situation of frequent impact involving micro sliding, high and varying temperatures, complex exhaust gas chemistry and possible particulates, etc. In addition, the tribological situation in the exhaust valve system is expected to become even worse due to strict future emission regulations, which will require enhanced combustion and cleaner fuels. This will substantially reduce the formation of combustion products that might ease the contact conditions by forming tribofilms on the contacting surfaces. The lack of protective films is expected to result in increased wear of the contact surfaces.The aim of the work presented in this thesis has been to increase the tribological understanding of the valves. The wear that takes place in the valve sealing interface and how the change in operating conditions affects it have been studied. Such understanding will facilitate the development of future valve designs.A test rig has been developed. It has a unique design with the ability to insert ppm amounts of media into a hot air flow, in order to simulate different environmental changes, e.g. varying amount and composition of combustion residue particles.PVD coated valves were evaluated in a dry atmosphere. It was concluded that although some of the coatings showed potential, the substrate could not support the thin, hard coatings.Investigations with an addition of different oils have been performed. Fully formulated oils proved to build up a protective oil residue tribofilm. This tribofilm has been in-depth analysed and proved to have similar composition and appearance as tribofilms found on low wear field tested valves. With a non-additivated oil, wear particles from the valve seat insert formed a wear particle tribofilm on top of the valve sealing surface. Without any oil the surfaces showed severe wear with wear particles spread over the surfaces.The results presented give a hint about what to be expected in the future, when the engine oils are replaced with ash less oils with reduced amount of additives and the consumed amount of oil within the cylinders are reduced." @default.
• W1995710063 created "2016-06-24" @default.
• W1995710063 creator A5077459468 @default.
• W1995710063 creator A5082383729 @default.
• W1995710063 creator A5084882623 @default.
• W1995710063 date "2012-04-16" @default.
• W1995710063 modified "2023-09-23" @default.
• W1995710063 title "Wear Study of Coated Heavy Duty Exhaust Valve Systems in a Experimental Test Rig" @default.
• W1995710063 cites W1539113942 @default.
• W1995710063 cites W1585017743 @default.
• W1995710063 cites W1593430854 @default.
• W1995710063 cites W1976389376 @default.
• W1995710063 cites W1979502864 @default.
• W1995710063 cites W1989687433 @default.
• W1995710063 cites W1992489707 @default.
• W1995710063 cites W1998567107 @default.
• W1995710063 cites W2007604859 @default.
• W1995710063 cites W2059865613 @default.
• W1995710063 cites W2069171513 @default.
• W1995710063 cites W2096221447 @default.
• W1995710063 cites W2154069640 @default.
• W1995710063 cites W2280529296 @default.
• W1995710063 cites W2281251237 @default.
• W1995710063 cites W2285806155 @default.
• W1995710063 cites W2485753710 @default.
• W1995710063 cites W2572147005 @default.
• W1995710063 doi "https://doi.org/10.4271/2012-01-0546" @default.
• W1995710063 hasPublicationYear "2012" @default.
• W1995710063 type Work @default.
• W1995710063 sameAs 1995710063 @default.
• W1995710063 citedByCount "4" @default.
• W1995710063 countsByYear W19957100632012 @default.
• W1995710063 countsByYear W19957100632013 @default.
• W1995710063 countsByYear W19957100632015 @default.
• W1995710063 crossrefType "proceedings-article" @default.
• W1995710063 hasAuthorship W1995710063A5077459468 @default.
• W1995710063 hasAuthorship W1995710063A5082383729 @default.
• W1995710063 hasAuthorship W1995710063A5084882623 @default.
• W1995710063 hasConcept C127313418 @default.
• W1995710063 hasConcept C127413603 @default.
• W1995710063 hasConcept C146978453 @default.
• W1995710063 hasConcept C151730666 @default.
• W1995710063 hasConcept C171146098 @default.
• W1995710063 hasConcept C192562407 @default.
• W1995710063 hasConcept C199104240 @default.
• W1995710063 hasConcept C2777267654 @default.
• W1995710063 hasConcept C2993573757 @default.
• W1995710063 hasConcept C39432304 @default.
• W1995710063 hasConceptScore W1995710063C127313418 @default.
• W1995710063 hasConceptScore W1995710063C127413603 @default.
• W1995710063 hasConceptScore W1995710063C146978453 @default.
• W1995710063 hasConceptScore W1995710063C151730666 @default.
• W1995710063 hasConceptScore W1995710063C171146098 @default.
• W1995710063 hasConceptScore W1995710063C192562407 @default.
• W1995710063 hasConceptScore W1995710063C199104240 @default.
• W1995710063 hasConceptScore W1995710063C2777267654 @default.
• W1995710063 hasConceptScore W1995710063C2993573757 @default.
• W1995710063 hasConceptScore W1995710063C39432304 @default.
• W1995710063 hasLocation W19957100631 @default.
• W1995710063 hasOpenAccess W1995710063 @default.
• W1995710063 hasPrimaryLocation W19957100631 @default.
• W1995710063 hasRelatedWork W2099158781 @default.
• W1995710063 hasRelatedWork W2331911012 @default.
• W1995710063 hasRelatedWork W2365814427 @default.
• W1995710063 hasRelatedWork W2555518771 @default.
• W1995710063 hasRelatedWork W2613156129 @default.
• W1995710063 hasRelatedWork W2899084033 @default.
• W1995710063 hasRelatedWork W2911299815 @default.
• W1995710063 hasRelatedWork W2947843619 @default.
• W1995710063 hasRelatedWork W3187398315 @default.
• W1995710063 hasRelatedWork W4238949903 @default.
• W1995710063 isParatext "false" @default.
• W1995710063 isRetracted "false" @default.
• W1995710063 magId "1995710063" @default.
• W1995710063 workType "article" @default.