壓縮天然氣汽車減壓器建模與仿真

1、分類號：U4610710—20051197滾步犬海碩士學位論文壓縮天然氣汽車減壓器建模與仿真導師姓名職稱申請學位級別張曉煒司利增副教授工學碩士學科專業(yè)名稱載運工具運用工程論文提交日期2008年5月19日論文答辯日期2008年5月30日學位授予單位長安大學答辯委員會主席學位論文評閱人曹建明教授曹建明教授劉圣華教授鶯AbstractInrecentyears，governmentsofcountriesofthewholeworldhave

2、beenseekingforasolutiontothedilemmabetweentheairpollutionresultedfromrepaidgrowthofvehiclepossessivequantityandthechangeofvehiclefuelstructure，forwhichnatural—gas—drivenvehicleisbeingencouragedgreatlyinmostcountriesNatur

3、algas—drivenvehicleisgenerallyabbreviatedasNGV(namelysuchvehicleisdrivenbypurelycompressednaturalgas—CNGliquefiednaturalgas—LHG)Foritsbetteremissionperformance，NGVisgoodforreformingcurrentvehiclefuelstructurewithlowerrun

4、ningcost，ripetechnologyandstablefunction，SOthatithasbeenacceptedasthebestchoiceforsubstitutetogasolinedrivenvehicleDecompressorisamostimportantcomponentinthefuelsupplysystemofCNGVwhosemajorfunctionislevelbyleveltodecompr

5、essthehighlycompressedNGtoadegreeforgasfuelpressuredegreethatisacceptablefortheengineHoweverastothedecompressorstructuredesigninChina，itiSraretoanalyzetheeffectofdecompressor’Sstructureparameteronitsperformanceintheviewp

6、ointofmathematicsmodeling，ratherthandetermineandregulatethedecompressor’SspecificstructuralparameterthroughpracticaltryoutInordertounderstandtheeffectofthedecompressor’Sstructuralparameteronitsactualworkingperformance，th

7、isdissertationappliesthemethodofcombiningtheoryandmodelinganalysistothestudysetsupphysicalandmathematicmodelsrespectivelyforthetransformationofinnergasandthemovablepartsofvalvesinthedecompressorandthroughusingtheMATLABma

8、thematicanalysisemulationsoftwareandtakingsuchperformanceindexrequirementasforevaluatingthesystematicstabilityandthevelocity’Sinfluencecapabilityofsystematiccontrolprincipleintoconsideration，makespressurevariationcurveem

9、ulationandstructureparameterperformanceanalysisfortheeffectfromchangingthedecompressor’Sstructureparameterinthemodels，thenbasedonthemodelsestablished，recommendsareasonablerangefortheoptionofparameterTheconclusionofthestu