EF.2-6
Delphienginemanagementsystm-MT20Usystemcontrol
6.Accelerating/decelerating/fuelcut&overflowcontrol
Whenevertheenginerotatingspeedisgreaterthanthesethighestrotatingspeed,systemwillcutofffuelsuppy,protecttheengine
bystoppingitsrotatingspeedfromrisingunlimitedly,andpreventvehiclefrom flying
Andsystemwillimmediatelyresume
thefuelsupplywhentherotatingspeedreturnstoalevellowerthanMax.rotatingspeedspecifiedbythesystem.
Duringthenormalrunningofengine,drivermayreleasethegaspedaltomakevehicleenteraslidingmode,andcounter-pulltheengine
andvehicledoesnotneedanydynamicforceprovidedbytheengine;Andasasmallerairinletamountafterthrottlevalvehasbeen
completelyclosedwillcauseaninsufficientcombustioninsideengine,whichresultsinanincrementofexhaustedharmfulmatters,
therefore,systemwillcutofffuelsupplyaccordinglytodramaticallydecreasethegenerationofharmfulmattersexhausted,fromengine,
andimprovethecost-effectivenessoffuel.
Afterrepeatedlyunsuccessfulstartingsofengine,petrolresidualswithoutsufficientcombustionwillremaininsidethecylind er,that
istheso-called floodedengine .Insuchcase,drivermaysteponthegastotheendtostarttheengine
andsystemwillauto.adopt
averyleanair/fuelratiotohaveexcessivepetrolinsidecylindertobeexhaustedwhiletheengineisrotating.
7.Play&plugairconditionercontrol
ECUwillmonitorA/CrequestinputandA/Cevaporatortemperaturesensorinput andcontroltheclutchforairconditioner
compressorviaanairconditionerrelay.Andsystemmayauto.identifytheairconditionersystembasedonaplay&plugbasis.
Workingconditionsofairconditioner
Theenginehasbeenstartinglongerthanfiveseconds.
Theairconditionermaybestartedwhentheenginerotatingspeedishigherthan600r/minandlessthan6200r/min.
Aftertheairconditionerandevaporatorarestarted,thedesiredengineidle-speedwillincreaseby150revolutions.
Theairinlettemperatureisgreaterthan3.75 .
hecooling-watertemperatureisgreaterthan3.75 .
Thecompressorwillbestartedwhenthecooling-watertemperatureislessthan105
.
Theairconditionercompressorwillbestoppedwhenthecooling-watertemperatureisgreaterthan108
.
Theairconditionercompressorwillbestoppedwhenthetemperatureforfrontairconditionerevaporatorislessthan1. 5 .
Thecompressorwillbestartedwhenthetemperatureforfrontairconditionerevaporatorisgreaterthan3.75
.
Toensurethedynamicperformance,airconditionerwillbecutoffwhenTPSisgreaterthan90%,ortheengineiswithheavyload.
C ar bon-canister solenoidvalvecontr ollogic
Fueltankiswithexteriorheatradiationandfuel-returnheattransfer;fuelinsidefueltankshallbeheatedtoformafuelevaporation,
whichwillbecollectedintoanactivatedcarboncanister.Andthecarbon-canistersolenoidvalvemaybeusedtocontrolthetimeas
toopenorclosethepassagebetweentheactivatedcarboncanisterandtheinletmanifold.
Workingconditionforcarbon-canistersolenoidvalve
Systemvoltagelessthan17V .
65.25 <enginewatertemperature<110.25 .
Theopeningdegreeofthrottleshallbegreaterthan1.2%andlessthan100%.
Theenginehasbeeninaclosed-loopworkmode,ortheoil-cuttimehasbeenlongerthantwoseconds.
Workmodeofcarbon-canistersolenoidvalve;ItsopeningdegreemaybedeterminedbyECUinaccordancewiththeoccupation
ratio
(PWM)signalbasedontheenginestatus.Whenunderanon-idle-speedcondition,Max.openingdegreeofcarbon-canister
solenoidvalvewillbedeterminedbyclosed-loopairflowamount,andMax.valueis100%.
9.Temper aturecontrollogicforthree-waycatalyticconver ter
A ttheinitialstageofstarting,thethree-waycatalyticconverterneedsarapidheatingprocesstostartworkanddecreasethe
exhaustof waste gas.Normally, the heatingprogress may bequickenedbyappropriately delayingthe ignition lead-angle.
Protectioncontrolforthree-waycatalyticconverter:Systemwillpredicttheworkingtemperatureofthree-waycatalyticconverter
whiletheengineisrunning:whenthepredictedtemperatureishigherthantheprotectiontemperature,thetimestartstocount;Ifthe
workingtemperatureofcatalyticconverterisalwayshigherthantheprotectiontemperaturewithinaspecifictime systemwill
decreasetheworkingtemperaturebycontrollingthefuelsupplyamountandincreasingtheair/fuelratio Aftersometimethatthe
predictedtemperatureforcatalyticconverterhasbeendecreased,resumetheoriginalair/fuelratio,andcontinuetopredicatethe
workingtemperatureofcatalyticconvertertoprepareforanactualprotection.
10.C oolingfancontr ol
WhethertoopeneachcoolingfanprovidedforsystemcontrolengineandairconditionermaybedeterminedbyECUdepending
onthetemperaturevalueofenginecoolant,andwhetherit’ sincompliancewithappropriaterequirementsforopeningtheair
conditioner.
-Whenwatertemperatureisgreaterthan92.25
thelow-speedfanwillrun.
-Whenwatertemperatureislessthan87
thelow-speedfanwillstoprunning.
-Whenwatertemperatureisgreaterthan98.25
thehigh-speedfanwillrun.
-Whenwatertemperatureislessthan93
thelow-speedfanwillstoprunning.
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