车辆工程外文翻译内燃机的燃油供应系统.docx

车辆工程外文翻译内燃机的燃油供应系统.docx

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车辆工程外文翻译内燃机的燃油供应系统

附录A外文翻译—原文部分

FuelSupplySystemForAnInternalCombustionEngine

Abstract

Apulsationdamperisprovidedbetweenandinserieswithalowpressurefuelsystempipeandahighpressurepumpofafuelsupplysystem.Duringstartupofanengine,lowpressurefuelsuppliedviathelowpressurefuelsystempipeisinjectedfromanintakepassagefuelinjector.Whenthefuelpressureisequaltoorlessthanafuelpressureatwhichgoodstartabilitycanbemaintained,thepulsationdamperclosesoffcommunicationbetweenthehighpressurefuelsystempipeandthelowpressurefuelsystempipeusingthespringforceofaspring.

Keywords:

Fuelsupplysystem;Aninternalcombustionengine;Apulsationdamper;Alowpressurefuelsystempipeandahighpressurepump;

Afuelsupplysystemforaninternalcombustionengine,comprising:

alowpressurepumpthatiscapabletopressurizefuel;alowpressurefuelsupplypassagethatiscapabletosupplyfuelthatwaspressurizedbythelowpressurepumptoalowpressurefuelinjectionmechanismwhichinjectsfuelintoanintakepassage;abranchpassagethatbranchesofffromthelowpressurefuelsupplypassageandthroughwhichthefuelthatwaspressurizedbythelowpressurepumpflows;ahighpressurepumpwhichiscapabletopressurizethefuelsuppliedviathebranchpassage,thehighpressurepumpbeingdrivenbytheinternalcombustionengine;ahighpressurefuelsupplypassagethatiscapabletosupplyfuelthatwaspressurizedbythehighpressuretoahighpressurefuelinjectionmechanismwhichinjectsfuelintoacylinder;andapulsationreducingmechanismprovidedonanintakesideofthehighpressurepump,wherein,whentheinternalcombustionengineisstartedbyonlyinjectingfuelfromthelowpressuresupplypassageintotheintakepassage,thepulsationreducingmechanismclosesoffcommunicationbetweenthelowpressurefuelsupplypassageandthehighpressurefuelsupplypassageuntilapressureoffuelinthelowpressurefuelsupplypassagereachesapredeterminedpressurevaluerequiredforstartingtheinternalcombustionengine.

Backgroundoftheinvention:

1.FieldoftheInvention

Theinventionrelatestoafuelsupplysystemforaninternalcombustionengineprovidedwithafuelinjectionmechanismthatinjectsfuelathighpressureintoacylinder（i.e.;afuelinjectorforin-cylinderinjection,hereinafterreferredtoas“in-cylinderfuelinjector”）andafuelinjectionmechanismthatinjectsfuelintoanintakepassageoranintakeport（i.e.,afuelinjectorforintakepassageinjection,hereinafterreferredtoas“intakepassagefuelinjector”）.Moreparticularly,theinventionrelatestoafuelsupplysystemthatcanimprovestartabilityofaninternalcombustionengine.

2.DescriptionoftheRelatedArt

Agasolineengineisknownwhichisprovidedwithafastfuelinjectionvalveforinjectingfuelintoacombustionchamberoftheengine（i.e.,anin-cylinderfuelinjector）andasecondfuelinjectionvalveforinjectingfuelintoanintakepassage（i.e.,anintakepassagefuelinjector）,anddividestheinjectedfuelbetweenthein-cylinderfuelinjectorandtheintakepassagefuelinjectoraccordingtotheenginespeedandengineload.Also,adirectinjectiongasolineengineisalsoknownwhichisprovidedwithonlyafuelinjectionvalveforinjectingfuelintothecombustionchamberoftheengine（i.e.,anin-cylinderfuelinjector）.Inahighpressurefuelsystemthatincludesanin-cylinderfuelinjector,fuelofwhichthepressurehasbeenincreasedbyahighpressurefuelpumpissuppliedtothein-cylinderfuelinjectorviaadeliverypipe.Thein-cylinderfuelinjectortheninjectsthehighpressurefuelintothecombustionchamberofeachcylinderoftheinternalcombustionengine.

Inaddition,adieselengineisalsoknownwhichhasacommonrailtypefuelinjectionsystem.Inthiscommonrailtypefuelinjectionsystem,fuelwhichhasbeenincreasedinpressurebyahighpressurefuelpumpisstoredinacommonrail.Thehighpressurefuelistheninjectedintothecombustionchamberofeachcylinderofthedieselenginefromthecommonrailbyopeningandclosinganelectromagneticvalve.

Inordertoincreasethepressureof（i.e.,pressurize）thefuelinthiskindofinternalcombustionengine,ahighpressurefuelpumpisprovidedwhichisdrivenbyacamprovidedonadriveshaftthatisconnectedtoacrankshaftoftheinternalcombustionengine.

JapanesePatentApplicationPublicationNo.JP-A-2005-139923describesahighpressurefuelsupplysystemforaninternalcombustionenginethatcanreducevibrationalnoisewhenonlyasmallamountoffuelisrequiredbytheinternalcombustionengine,suchasduringidling,whilebeingabletodeliverthenecessaryamountoffuelovertheentireoperatingrangeoftheinternalcombustionengine.Thishighpressurefuelsupplysystemforaninte