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Valve recession: From experiment to predictive model

Lewis, R., Dwyer-Joyce, R.S., Slatter, T. and Brooks, A. (2004) Valve recession: From experiment to predictive model. VDI Berichte (1813). pp. 79-93. ISSN 0083-5560

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Abstract

Increasing demands on engine performance and cost reductions have meant that advances made in materials and production technology are often outpaced This frequently results in wear problems occurring with engine components. Few models exist for predicting wear, and consequently each wear problem has to be investigated, the cause isolated and remedial action taken. The objective of this work was to carry out experimental studies to investigate valve and seat insert wear mechanisms and use the test results to develop a recession prediction tool to assess the potential for valve recession and solve problems that occur more quickly. Experimental apparatus has been developed that is capable of providing a valid simulation of the wear of diesel automotive inlet valves and seats. Test methodologies developed have isolated the effects of impact and sliding. A semi-empirical wear model for predicting valve recession has been developed based on data gathered during the bench testing. A software program, RECESS, was developed to run the model. Model predictions are compared with engine dynamometer tests and bench tests. The model can be used to give a quantitative prediction of the valve recession to be expected with a particular material pair or a qualitative assessment of how parameters need to be altered in order to reduce recession. The valve recession model can be integrated into an industrial environment in order to help reduce costs and timescales involved in solving valve/seat wear problems.

Item Type: Article
Copyright, Publisher and Additional Information: This is an author produced version of a paper published in 'VDI Berichte'.
Keywords: Automobile engines Automobile seats Computer simulation Computer software Intake systems Mathematical models Problem solving Wear resistance Engine performance Inlet valves Model predictions Valve recession Valves (mechanical)
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
Depositing User: Mr Christopher Hardwick
Date Deposited: 13 Aug 2009 13:46
Last Modified: 08 Feb 2013 16:58
Status: Published
Publisher: VDI The Association of German Engineers
URI: http://eprints.whiterose.ac.uk/id/eprint/9084

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