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1、分類號(hào)：TB051071020050381譴孝夫海碩士學(xué)位論文氣體燃料發(fā)動(dòng)機(jī)電控系統(tǒng)研究導(dǎo)師姓名職稱申請(qǐng)學(xué)位級(jí)別論文提交日期學(xué)位授予單位李建勛張春化教授答辯委員會(huì)主席學(xué)位論文評(píng)閱人邊耀璋教授李鵬飛副教授AbstractBecauseenergyshortagesandenvironmentalproblemsbecomemoreprominent，enginecontroltechnologyandcleanenergyresearch

2、concerniSgainingmoreattentionMeanwhile。thereareabundantgasresourcesinourcountryAndtheapplicationofalternativefuelsingaseousengineshasimportantpracticalsignificanceLowexhaustemissionsandfuelconsumptioncanbeobtainedbyusing

3、gaseousfuel(compressednaturalgasandliquefiedpetroleumgas)inmotorvehiclesTheapplicationofnaturalgas(NG)vehiclesisveryactiveinrecentyearsAndnaturalgasvehiclesaccountedforaveryhighmarketshareamongthecity’SbusandtaxiTheappli

4、cationofnaturalgashasattractedtheworldattentionbecauseitisacleanfuelManydomesticandforeignresearchinstitutesarecommittedtostudytheautomotiveenginefueledwithnaturalgasOnthebasisofthestudyofimprovingthedynamicperformanceof

5、naturalgasengine，thispaperdesignthegasfuelengineelectroniccontrolsystem，whichincludes：theenginespeedsignal，throttlepositionsignaltotheengineoperatingconditions，consideringthestudyofthegaseousenginecontroltechnologyandthe

6、currentexperimentalconditionsTocontrolsomefunctionsoftheenginefuelsupplyandtheoptimallyairfuelratioaftertheopen—loopcontrolsystemandclosed100pcontrolstrategyaredeterminedTheemphasesoftheopen100pcontrolsystemaretheenginep

7、owercharacterandthetimingoffuelsupplywhiletheemphasesoftheclosedloopcontrolsystemsaretoimprovefueleconomythroughcollectingreal—timeoxygensensorsignaltocontrolthefuelairratiooptimallyThecontroloftheengineignitiontimingand

8、temporarilyclosedangleisalsodominatedbycurrentECUofgasolineengineThepurposesofdesigninggaseousfuelenginesarethebelowtwo：oneistoimprovethecurrentenginecontrolsystemandtomakeitmoreresponsivetodifferentengineoperatingcondit

9、ionsandtoimprovetheenginestarting，acceleratepowercharacteristicsandthemajoreconomyunderpartloadoperatingconditionsTheotheriStoprovidetheessentialreferencesfordesigningthesinglegaseousengines’ECUTheexperimentalresultsshow

10、thatthecontroloffuelsupplysystemandthestepmotorresponsecanfullymeetthedesignrequirementsforgaseousfuelenginesThedesignreachestheexpectedeffectsThesystemsoftwaredesigniSscientificrationalandrealisticItprovidesthenecessary

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