Design of Over Center Valves Based on Predictable Performance

M.R. Hansen, T.O. Andersen, P. Pedersen, Finn Conrad

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


A typical oil hydraulic over center valve system and a time domain simulation model is introduced together with a hypothesis that flow force compensation should reduce the inherent oscillatory behavior of such hydraulic systems. A few results are shown from a parameter study that confirms this assumption and an approach to design over center valve geometries that have negative flow forces is presented with emphasis on predictability. In conclusion it is made clear that negative flow forces in the over center valve cannot solve the instability problem in general, however, it might very well be a method like lowering the pilot ratio, that can be used to application specific instability problems.
Original languageEnglish
Title of host publicationProceedings of ASME Intl Mechanical Engineering Congress IMECE´04 : Fluid Power Systems and Technolgy
Place of PublicationNew York, USA
PublisherAmerican Society of Mechanical Engineers
Publication date2004
ISBN (Print)0-7918-4179-0
Publication statusPublished - 2004
EventASME International Mechanical Engineering Congress IMECE´04 - Anaheim, CA, United States
Duration: 14 Nov 200419 Nov 2004


ConferenceASME International Mechanical Engineering Congress IMECE´04
Country/TerritoryUnited States
CityAnaheim, CA
Internet address


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