采用EGR和催化還原技術(shù)降低柴油機NO-,x-排放的試驗研究.pdf

1、大連理工大學(xué)碩士學(xué)位論文采用EGR和催化還原技術(shù)降低柴油機NO排放的試驗研究姓名：周文彬申請學(xué)位級別：碩士專業(yè)：動力機械及工程指導(dǎo)教師：高希彥20060601采用EGR和催化還原技術(shù)降低柴油機NO。的試驗研究ExperimentalStudyofDieselNOxemissioncontrolwithEGRaildAftertreannentAbstractWiththcdevelopmentofglobalautomobileindu

2、st叮，thepollutioncausedbyautomobileexhausthasbecolllemorea11dmoreseVere，especiallyN0xpollutionDuringmeseyears，megoVemmentrecognizetlleproblemand1egislateto1imittheexhaustemissionAsmemainpowersowceofVehicle，thequestionhowt

3、o叫母NOxemissionfordieselh船becomeoneoft11ehotspotsNow，tecllIlologyofEGRaIldaRer七ma衄entareknownasthetwoeffectivememodstopuri白NOxemissionwhichareavailablefordieselTllcobjectiVeofthethesisistodosomeresearchontllc印plicationofE

4、GRandafter峙eatmentThef01lowingaremem血contents：Thefirstpanisaboutexpcfimental咖dyon也eeffectsofcoolEGRforTRcombustionsystemTestresultsshowtllat，themaXmmmofEGRrateis154％；Comparedwithoriginaldata，memaximurnofin—cylillderpress

5、ureandaveragetemperatIlreall出opalittleInⅡomiIlalenginespeed，stanofcombustion(SOc)doesn’tchangeina11kindsofloadbutthedumtionperiodofcombuStionlooks10ngerinmallyw口rkingcondi舶nsItmeans，ifthem骶sofrecirculationexhaustislow，me

6、mainRmctionofEGRwhichhasinnuenceoncombustionprocessisheatef詫ctAboutemissioncon由吣l，matchedwimTRcombustionsystem，coolEGRcouldp“母N0xemissions，butonnleomerhalld，PMand矗lelmassratewillincrcasealimeThesecondpartisaboutexperimen

7、talstudyontlleefrectsof1eanNoxc刪ystfordieselemissionconⅡ01Int11ethesis，combinedwimDPF，P七瓜h伊dandCu—ZSM5catalvstsarepr印aredThereducerareHCmixtureswhicharegivenout丘DmtheengineTheobjectiveoftlletcstistogainunder曲吼dingt11eper

8、fonllancea_boutcatalystavidity，stability，lowestca伽ystictemperaturea11d廿le姍geofef詫ctiveca協(xié)lystictempemture，etcTestresultsshowthat，comparedwitllCuzSM5，noblementalcatalystshavebeneravidi夠，stabilityaIldⅡlerange0fef傳ctivec削ys