DOC2bPOC在直列泵柴油机上的应用分析

DOC2bPOC在直列泵柴油机上的应用分析

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时间:2019-06-24

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1、武汉理工大学硕士学位论文AbstractElectronicfuelinjectionpumpshavelotsofadvantages,suchasstablerunning,fastresponse,highprecision,compactstructure,convenientmaintenance,andSOon.However,thetraditionalmechanicalfuelinjectionpumpsstillhavemarketcompetitivenessindieselenginefieldbecauseof10Wcost,sim

2、pleinjectioncontrol,andotheredge.Therefore,toworkonemissioncontrolaboutdieselengineswhichareequippedwithmechanicalfuelinjeetionpumpswouldbeveryimportantforthepurposeofenergysavingandemissionreductionofvehicles.TmspapermainlydiscussesemissionupgradetechnicalroutesoftheYC6Lenginewitl

3、linlinefuelinjectionpumps.DieselenginedischargepollutantsincludePM,NOx,HC,CO,andSOon.Emissioncontrolregulationshavegovernedstrictlimitvalues,especiallyPMandNOx.Duetotheexistenceof“trade-off'’relationshipbetweenPMandNOxemissioncontrol,wecouldn’tonlyusepurifyin-enginetechniquetoreduc

4、ePMandNOxemissioneffectivelyatthesanletime.Consequently,thisarticlechoosesaftertreatmentsystemassolutiontoupgradeYC6Ldieselengineemission.砸spaperfirstlytoexpoundtheharmfulness,formationmechanism,andinfluencefactorsofdieselenginedischargepollutants;afterthat,mainlytointroducetheafte

5、rtreatmenttechnology,suchasDOC/DPF/PoC/SCRtoresearchtheire彘ctingmechanism,abilitiesandrestrictedfactors.Further,thesefundamentaltheorieswouldofferhelpfortheselectionofcatalyst.ConsideringtheeconolIliccostandtheemissionregulations,thefinallydeterminedtechnicalrouteforYC6Ldieselengin

6、eemissionmeetingStageIVstandardisDOC&POC&SCRcombined—typeafter-treatmentsystem.EmissionupgradingfromStageIIItoIVstandardrequiresPMconversionefficiencycouldexceed80%,SOPMemissioncontrolisthekeyfactortoattaintoStage1Vstandardfordieselengine.Further,thispaperwouldputmoreemphasisonreas

7、onableevaluationoftheselectionofPOCcatalyst,whichisassemblyincombinedaftertreatmentsystemusingforpurifyingPM.InordertoevaluatetherationalityoftheselectionofthePOCcatalyst,dieselII武汉理工大学硕士学位论文enginetestshouldbecarriedoutforinspection.Therefore,thethruststandshouldbesetup,andtestsubj

8、ect,controldevice,POCcatal

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