汽油机燃料供给系Gasoline engine fuel supply system.docx

汽油机燃料供给系Gasoline engine fuel supply system.docx

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汽油机燃料供给系Gasolineenginefuelsupplysystem

汽油机燃料供给系（Gasolineenginefuelsupplysystem）

Thefourthchaptergasolineenginefuelsupplysystem

First,themultiple-choicequestion:

Theamountoffuelsuppliedbythe1.diaphragmtypegasolinepumpdependsonthesizeofthepump.

A.patchuplink

B.patchdownlink

C.diaphragmspringtension

D.rockerswingmomentum

2.iftheeccentriconthecamshaftisbadlyworn,thegasolinepump（）.

A.fuelpressurerise

B.lowerfuelpressure

C.increaseofoilpercycle

D.thefuelsupplypercycledecreases

3.whenthegasolineengineisinthemiddleloadcondition,theexcessairvalueshouldbe（）

A.0.2,~0.6

B.0.7~0.9

C.0.8,~0.9

D.0.9~1.1

4.,ifthegasolinepumpdiaphragmspringisperfect,willmake（）.

A.fuelsupplyincreased

B.fuelsupplydecreased

C.fuelpressureistoohigh

D.lowfuelpressure

5.now,theidlespeedratingofthegasolineengineishigherthaninthepast.

A.canincreasetheratedspeedofengineandincreasepoweraccordingly

B.reducesfuelconsumption

TheC.speedsuptheengine

D.canmakeuseoflowermixtureatidleandreduceexhaustpollution

6.whentheengineisunderheavyloadcondition,theexcessaircoefficientshouldbein（）range.

A.0.6~0.8

B.0.8~0.9

C.0.9~1.1

D.1.1~1.2

Whenthe7.gasolineengineworks,theinletpipeentersthecylinder

A.gasoline

B.air

C.gasmixture

D.diesel

8.themaincomponentsofthegasmixtureare:

（）

A.airfilter

B.carburetor

C.gasolinepump

D.gasolinefilter

9.themainassembliesusedtocompletethedeliveryofgasolineduringtheoperationofthegasolineengineare:

（）

A.airfilter

B.carburetor

C.gasolinepump

D.gasolinefilter

10.themainassembliesusedtoprovidecleanairduringtheoperationofthegasolineengineare:

（）

A.airfilter

B.carburetor;

C.gasolinepump;

D.gasolinefilter

11.theexcessairfactorofthetheoreticalmixtureis:

（）

A.1

B.0.85~0.95

C.1.05~1.15

D.

Fourteenpointseven

Theexcessairfactorofthe12.powermixtureis:

（）

A.1

B.0.85~0.95

C.1.05~1.15

D.14.7

13.theexcessairfactorofthemixedgasis:

（）

A.1

B.0.85~0.95

C.1.05~1.15

D.14.7

14.theair-fuelratioofthetheoreticalmixtureis:

（）

A.1

B.0.85~0.95

C.1.05~1.15

D.14.7

15.whatextentdoestheexcessaircoefficientofthemixtureleadtowhenthecombustionrateslowsdownandtheperformanceoftheenginebeginstodecrease?

（）

A.<0.4to0.5;

B.>1.15;

C.<0.88;

D.>1.3to1.4

Two、judgmentquestions:

1.thegasolineenginemixtureisformedinthecylinder.（）

2.whenthegasolineengineisworking,themixtureiscompressedandspontaneouscombustion.（）

3.thethrottlevalveinthecarburetorisusedtocontroltheintakeoftheengine.（）

4.whenthegasolineengineburnsnormally,theflameshouldtravelatacertainspeed.（）

5.thefunctionoftheventuriinthecarburetoristolimittheintake.（）

6.atidle,thethrottlevalveopenswithminimalentryintothecylinderandrequiresasmallamountofconcentratedmixture.（）

7.whenthesmallload,thequantityandqualityofthemixtureishigherthantheidlespeed,sothemixtureisrequiredtobestrongerthantheidlespeed.（）

8.enginesoftenworkundermoderateloadsandshouldbesuppliedwithastrongermixturetoensureagoodengineperformance.（）

9.,inordertoensuretheengineunderlargeloaddynamicrequirements,shouldbesuppliedwithahighconcentrationofpowermixture.（）

10.inidleconditions,theenginedoesnotoutputpower,thesupplyofathinnermixturecanmeettherequirements.（）

11.whentheengineisspeedingup,itshouldbeaddedwithastrongmixturetoincreaseenginepowerrapidly.（）

12.theairvalveonthelidofthegasolinetankpreventsthepressureinthetankfromtoolowandaffectsthenormalsuctionofthegasolinepump.（）

Thesteamvalveonthetopofthe13.gasolinetankpreventsthepressureinthetankfrombeingtoohigh,soastoensuresafety.（）

14.inuse,thegasolinefiltercanbeinstalledinanydirection.（）

15.thefunctionofthegasolinepumpistofilterthemoistureandimpuritiesinthegasoline.（）

16.whentheengineworks,thefuelsupplyofthegasolinepumpremainsconstant.（）

17.withthehandrockerpumpoil,ifthefloatchamberoilleveluptotherequiredheight,willnotpulltherockerarm.（）

18.whentheengineworks,nomatterhowmuchgasolinepumpsupplies,therockerarmanddiaphragmstrokearefixed.（）

19.whentheengineworks,nomatterhowmuchfuelthepumpsupplies,theswingrangeoftherockerarmisfixed.（）

20.gasolinepumpisgenerallyinstalledonthecylinderside,theuseofeccentricwheelonthecamshafttodrive.（）

21.useairfilterstofilteroutimpuritiesintheair,mainlytoreduceenginewear.（）

22.airfiltercanonlyeliminatetheimpurityparticlesintheairof.（）

23.paperdryairfiltermainlyfiltertheimpuritiesintheairbyitsfiltercore.（）

24.thepaperdryairfiltermainlyusestheinertiawaytofilterouttheimpurityintheair.（）

25.whenmaintaining,thefiltercoreofpaperdryairfiltershouldbesoakedinoil,andtheninstalledagain.（）

26.inthewholerangeoftheautomobileengine,themainoilsupplydeviceactsasanoilsupply.（）

27.themainoilsupplydeviceusesthemethodofreducingthevacuumatthemainorificetoensurethatthemixturebecomesthinnerastheopeningofthevalveincreases.（）

28.,theidledeviceistoensurethattheengineinidleandverysmallloadconditions,thesupplyoflessdensemixture.（）

29.whentheengineisidletheidlejetandtransitionnozzleoftheidledevicearebothinjectedwithoil.（）

30.whetherthemechanicalenrichmentdeviceworksdependsontheenginespeedandload.（）

31.whetherthevacuumconcentrationdeviceworksdependsonlyontheenginespeed.（）

32.,thethrottlevalveopeningincreases,theaccelerationdevicewillwork.（）

33.whentheenginestartscold,thechokevalveisclosed,mainlybyreducingtheamountofairsuppliedtoincreasetheconcentrationofthemixture.（）

34.themainpurposeofthecarburetorwithmultiventuriistomakethefuelatomizationbetter.（）

35.carburetorthrottlevalveismainlyusedtocontroltheamountofairintake,usuallybythedriverthroughthefootpedalcontrol.（）

36.thefunctionoftheintakemanifoldistocollecttheexhaustgasesfromthecylindersandtoexhaustthemintotheatmosphere.（）

37.thefunctionoftheexhaustmanifoldistocollecttheexhaustgasesfromthecylindersandtoexhaustthemintotheatmospherebytheexhaustmuffler.（）

38.duetotheinstallationofexhaustmufflertoincreasetheexhaustresistance,enginepowerdecreasedslightly.（）

Three.Questionsandanswers:

Whatisthefunctionofthefuelsupplysystemofthe4-1.gasolineengine?

Whatarethecarburetorfuelsupplysystemsforthe4-2.gasolineengine?

Whatisthecompositionandfunctionofthe4-3.floatmechanism?

4-4.whatisthefunctionofthemeteringholeinthesimplecarburetor?

Howdoesthe4-5.mixtureform?

4-6:

gasolineenginecombustionprocessishowtocarryout?

4-7.whatisexcessairfactor?

4-8.whatistheair-fuelratio?

Whatistheeffectof4-9.mixtureconcentrationonengineperformance?

4-10:

whatistheengineworkingcondition?

Howtoexpress?

4-11:

whatistheengineload?

Howtoexpress?

4-12:

whentheengineworks,what'stherequirementforthegasmixtureconcentration?

4-13:

whatvalvesarethereonthelidofthegasolinetank?

Whatisitsfunction?

Whatisthefunctionofthe4-14.gasolinefilter?

Howmanykindsarethere?

Whatisthefunctionofthe4-15.gasolinepump?

Whyisthereaventinthelowerpartofthe4-16.gasolinepump?

Howdoesthe4-17.gasolinepumpadjustthefuelsupplyautomatically?

What'sthefunctionofthe4-18.airfilter?

Whattypesofairfiltersareusedin4-19.atpresent?

Howdoesitfilteroutimpuritiesintheair?

Whataretheadvantagesanddisadvantagesofthe4-20.paperdryairfilter?

Whatisthefunctionofthemainoilsupplydeviceofthe4-21.carburetor?

Howtoachieveitsfunctioninstructure?

Whatisthefunctionofthe4-22.idledevice?

Howdoesitwork?

Whatisthefunctionofthe4-23.enrichmentunit?

Whyaretheretwosetsofcondenserinstalledonthecarburetor?

Whatisthefunctionofthe4-24.accelerationdevice?

Whatisthefunctionofthe4-25.starter?

Whatistheusualstartingdevice?

Whattypesof4-26.carburetordoyouhave?

Whatarethemaincontrolmechanismsforthe4-27.carburetor?

Whatisitsfunction?

Whatisthefunctionofthe4-28.intakeandexhaustmanifold?

Whatisthefunctionofthe4-29.exhaustmuffler?

Howdoesthe4-30.checkandadjusttheheightoftheoillevelinthefloatchamber?

Howdoesthe4-31.checkandadjustengineidlespeed?

Howdoesthe4-32.adjustthecarburetorvacuumenrichmentdevice?

Howdoesthe4-33.adjustthecarburetormechanicalenrichmentdevice?

Howdoesthe4-34.overhaulthecarburetoracceleratorpump?

Howdoesthe4-35.checkthepumpcapacityofthegasolinepump?