engine noise synthesis based on cylinder pressure data

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1、RESEARCHACOUSTICSAUTHORSENGINENOISESYNTHESISBASEDONCYLINDERPRESSUREDATANoisequalityevaluationsduringthecombustionprocessdevelopmentaredifficult.DIPL.-ING.In aFVVproject,amethodforutilisingthermodynamicdatatocreateanaudibleMICHAELKAUTHisResearchAssociateatenginenoisehasbeendevelopedattheInst

2、ituteforCombustionEnginesofthetheInstituteforCombustionEngines(VKA)attheRWTHAachenUniversity.Thus,anassessmentofthenoisequalityintheearlyRWTHAachenUniversitystagesoftheenginedevelopmentbecomespossiblewithouttheneedofdirect(Germany).NVH measurements.PROF.DR.-ING.STEFANPISCHINGERisDirectoroft

3、heInstituteforCombustionEngines(VKA)attheRWTHAachenUniversity(Germany).ALFORSCIENTIFICOVAPPRRTICFALOESLAINESMETZH.T

4、PEERREVIEW

5、DR.-ING.RRECEIVED2013-02-01.EYKLAUSPFLEIDERERVREVIEWED2013-03-27RITEWACCEPTED2013-07-13SUisLeadNoiseEngineerEDDNBIforDieselEnginesatYENDXPEHAAdamOpelAGinRTSFRARCOMR

6、ESERüsselsheim(Germany).DR.-ING.MARTINNIJSisChiefEngineerattheInstituteforCombustionEngines(VKA)attheRWTHAachenUniversity(Germany).581MOTIVATIONorwiththehelpofaccelerationsensors.Therearedifferentmeth-2MODELCONCEPTodsforthesuccessfulpredictionofnoiselevelsandsometimes3USEDDATABASEthespectra

7、lcompositionofthecombustionnoiseaswell[1-4].4NOISEPREDICTIONANDSYNTHESISThemethodscanbeimplementedinthemeasurementsystems5RESULTSofthethermodynamictestbenchesorintegratedintothemeas-6SUMMARYANDOUTLOOKurementchainintheformofadditionalhardwarecomponents.Apartfromthethermodynamicparameters,ani

8、ndexforthecharacterisationoftheacousticsisgeneratedtoallowanevalua-1MOTIVATIONtionofthedifferenttargetparameters.ThecurrentlyappliedproceduresonthebasisofthecylinderPassengercarsofallclasseshavebeenandarecontinuouslybeingpressuredatahaveincommonthatnoiselevelvaluesaregainedimprovedwithregar

9、dstoimpressionofthevehicles’qualityandasbaselinedataforthetotalnoise,thetotalcombustionnoiseorcomfort.Thenoisebehaviourofthevehiclesandinparticularthefortheirfrequencycomponents.However,thisonlyallowsalimitedcombustionenginesisacriticalaspect.Despitethes