_Modelling_and_Simulation_of_Variable_Displacement_Vane_Pumps_for

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1、2004-01-1601ModellingandSimulationofVariableDisplacementVanePumpsforICEngineLubricationS.Mancò,N.Nervegna,M.RundoPolitecnicodiTorinoG.ArmenioPierburgSpACopyright©2004SocietyofAutomotiveEngineers,Inc.ABSTRACTringandthepumpcover.Vanesareexposedattheirrootstodeliverypressurev

2、iaanarrowductmanufacturedintheThepaperpresentsgeometric,kinematicandfluid-dynamiccaseandareheldinplacebyaninnerringtoavoidpossi-modellingofvariabledisplacementvanepumpsforlowblestitchingespeciallyincoldstartoperatingconditions.pressureapplicationsininternalcombustionengine

3、slubri-cation.Allthesefundamentalaspectsareintegratedinasimulationenvironmentandformthecoreofadesigntoolleadingtotheassessmentofperformance,criticalissues,relatedinfluencesandpossiblesolutionsinawellgroundedengineeringsupporttodecision.INTRODUCTIONAsignificanteffortincurre

4、ntautomotiveresearchisori-entedtoidentifyareaswhereapotentialexistsforfuelcon-sumptionandemissionsreduction.Variabledisplacementlubricatingoilpumpscanmakeacontributioninthisdirec-tionowingtotheirintrinsiccapabilityofmatchingoilcon-sumersdemandatvariousoperatingconditionsbe

5、sidesthecriticalsituationathotengineidling.Accountingforlowpressureoperationandadditionalconstraintsinvolvingcostandpackagingcriteriathevanepumptypelendsitselfasoneofthemostpromisingcandidate.ThisisconfirmedbyFigure1:pumpschematicrecentcontributionsinthetechnicalliterature

6、andbyacon-sistentstriveinprototypesdevelopmentbycarmanufactur-ersworldwide.However,timetomarketabbreviationMATHEMATICALMODELrequirespowerfulsimulationtoolsforproperandpreventiveappraisalofpotentialsolutionsandthispresumestheavail-REFERENCEFRAMESabilityofcarefulmodellingreg

7、ardingthebasicgeometrylayout,thekinematicinterrelations,thefluid-dynamicConsideringO1andO2astherotorand,respectively,theaspectsleadingtointernalpressuredistributionandthestatorcentres,a“vectorray”[1]canbedefinedastheseg-dynamicbehaviourofdisplacementcontrolsystems.mentconn

8、ectingavane-ringcontactpointwithcentreO1.Fig.1showsthevanepumpprototype.Thestatorringpos-