Mathematical on-board engine-out soot emission model

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1、DEVELOPMENTDEVEloPmEnTmEThoDsMATHEMATICALON-BOARDENGINE-OUTSOOTEMISSIONMODELInviewofemissionstandardsEuro6,Tier2Bin5andthosetofollow,IAVhasdevelopedanalgorithmthatisconsistentlyoptimisedformaximisingautomationofcalibrationwhileensuringextremelyprecisedynamicsandalsoprovidingahighlevelofresilien

2、cetochangesincombustioncalibrationoreffectsofaging.Enhancingmodelquality,thismakesitpossibletoshortenthetimeneededtocalibrateDPFcontrolordiagnosticsandsavecostsinmassproductioncalibration.26AUThoRsINADEQUATERESULTSINusedtodevelopthemodelusingtheTay-DYNAMICDRIVINGCONDITIONSlorseriesapproachandst

3、ructureitfromtheoutsetforefficientlyintegratingtran-Suitableforcontrolunituse,modelsforsientandmobilesootparticlemeasure-computingengine-outsootemissionarementtechnology(Eq. 1).employedforcontrollingDPFregenera-tionorforOBD(on-boarddiagnostics).n∂DR.-ING.ECKHARDSTÖLTINGAlthoughthedemandsonmodel

4、accu-____c0,kcSoot=cSootMap+∑isChiefDieselProjectmanagerintheracyareusuallyonlyintegral,theycanEQ.1k=1∂zVar,kPowertrainmechatronicsDivisionatbedescribedasaltogetherhigh.Attain-(zVar,k–z0,k)theIAVGmbhinGifhorn(Germany).ablemodelqualityislargelygovernedherebythecorrectnessofcomputingsootForeachen

5、gineoperatingpoint,engine-emissionsinoperatingrangesinwhichitoutsootemissionsarecomputedontheisnotoronlypartlypossibletomeetset-basisofEq.1asthesumofbasemappointvaluesdynamically–inparticularcSootMapandthepartialderivativesofallthoseoftheairsystem.Particularlyinrelevantinfluencingvariablesmulti

6、plieddynamicdrivingconditions,currentbythedifference(zVar,k–z0,k).Here,theDR.-ING.DANIELECKARDTcontrolunitmodelsforcomputinginputvariablesaredeterminedsolelyisDieselAlgorithmDeveloperinthePowertrainmechatronicsDivisionatengine-outsootemissionsoftenonlyfromthemeasurementvariablesthataretheIAVGmb

7、hinGifhorn(Germany).deliverinadequateresults.Thisproducespresentanywayinthecontrolunit.Con-discrepancies,forexample,betweensequently,noothermeasurementtech-modelledandmeasuredregenerationnologyisneeded.BasemapcSootMapde-intervalso