DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx

上传人:b****6 文档编号:21120712 上传时间:2023-01-27 格式:DOCX 页数:19 大小:188.85KB
下载 相关 举报
DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx_第1页
第1页 / 共19页
DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx_第2页
第2页 / 共19页
DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx_第3页
第3页 / 共19页
DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx_第4页
第4页 / 共19页
DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx_第5页
第5页 / 共19页
点击查看更多>>
下载资源
资源描述

DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx

《DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx》由会员分享,可在线阅读,更多相关《DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx(19页珍藏版)》请在冰豆网上搜索。

DelphiEngine test bench calibration methodology for Delphi Diesel common rail systemWord下载.docx

BSFC:

BrakeSpecificFuelConsumption

TDC:

TopDeadCenter

PWM:

PulseWidthModulation

I/D:

InnerDiameter

ECU:

ElectronicControlUnit

HP:

HighPressure

I2C:

IndividualInjectorCharacteristic

APC:

Accelerometerpilotcontrol

ERPM:

EngineRevolutionPerMinute

APV:

ApplicationProgrammableVariable

APM:

ApplicationProgrammableMap

4.Testcelldefinitionandenginechecking

4.1.Instrument

Thetestcellshouldincludeallthenecessaryinstrumentsforperformancetest,andemissiontestifneeded.Generallybelowinstrumentsarerequiredinatestcell.

_dynamometerandcontrolunit

_fuelbalancerwithreasonableaccuracy

_fuelcooler

_cylinderpressuremeasurementequipment

_temperaturesensortomeasuretheexhausttemperatureforeachcylinder

_airfilterandflowmeter

_intercooler

_temperaturesensors

temperaturesensorsbeforeandafterintercooler,exhausttemperaturesensor,coolanttemperaturesensor,oiltemperaturesensorarenecessarytomonitortheenginestatusandkeeptheengineruninsafeconditions

Sensorstomonitorthefueltemperaturebeforepumpinlet,fueltemperaturesforinjectorreturnandpumpreturnareoptionalandwhichwillhelptomonitorthelowpressuresystem.

_pressuresensors

exhaustpressuresbeforeandafterturbo,oilpressure,airpressuresbeforeandafterintercooler

_emissioninstrumentifemissionmeasurementisrequired

_SteadyvoltagesupplytopowerECU;

10-16voltageisacceptable

_Atmospheremeterandhumiditymeter

4.2Lowpressuresystem

4.2.1Circuitfortestcell

Thepipeworkandfittingstobeminimum8mmI/D

Thepipeworkthatisincontactwithfuelshouldnotcontaincopperorzinc

Therecommendedgenericconfigurationofthelowpressurecircuitforatestcellisdescribedinthefollowingdiagram:

FUELCOOLER

(IFREQD)

4.2.2.PressureConditions

ThedepressionattheHPpumpinlet(measured50mmfromthepumpinlet)mustbeabove-400mbarinrelationtotheatmosphericpressure.

Ifthislevelisreached,STOPTESTandinvestigatecause.

ThepressureattheHPpumpreturn(measured50mmfromtheventurioutlet)mustbebelow300mbarabovetheatmosphericpressure.

Theselimitationsaregeneric,specificlimitationsforeachapplicationwillbeprovidedinsystemobjectivespecification.

4.2.3TemperatureConditions

Thefueltemperatureshouldbekeptas40-45degreeCatnormalrunningconditions.

Forthehottest,thetemperatureatpumpinletshallremainbelow85°

C(Peaktemperatureof90°

Ccanbeacceptedduring30secondswhenrunning).Thelowpressurecircuitmustallowtheadditionalheatwhichcomesmainlyfromtheleakreturnoftheinjectors,tobedissipated.Thistemperaturecouldbeashighas110DegCathighengineloads.

IfthetemperaturedifferentialacrosstheHPpump,INLETtoRETURNexceeds50degC,STOPTESTandinvestigatecause.

Theselimitationsaregeneric,specificlimitationforeachapplicationwillbeprovidedinsystemobjectivespecification.

4.2.4FilterChangeInterval

Thefilterelementshouldbechangedafter200hoursofenginerunning.

Thislimitationisgeneric,specificlimitationforeachapplicationwillbeprovidedinsystemobjectivespecification.

Seealsofilterteamrecommendationofthefilteranalysis.

4.2.5Watersedimentor

Checkandemptyifneeded.Sameintervalasfilterchange

4.3Airinletandexhaustsystem

-monitorpressuredropacrossintercoolerifapplicable

-monitorbackpressure

4.4Electricalsystem

4.4.1.BatteryVoltage

ThesystemensuresnormalfunctionforbatteryvoltagesattheECUsupplypinconnectorsbetween10to16V.ThevoltageshouldbekeptsteadytoguaranteetheFIEsystemworkproperly.Ifthevoltageisnotatnormalcondition,somerecoveryactionsneedtobetakenintoaccounttoputbackthevoltagetonormalsteadyvoltagelevel.

Thesystemcanoperateforamaximumof1hourbetween16Vand18VatECUsupplypin,andthefunctionmaybedeteriorated.Duringjumpstart(between18Vand24VatECUsupplypin),thesystemcanmeetatleastthefunctionalrequirementrelevantforthestartofvehicle,theover-voltage(between18Vand24VatECUsupplypin)timeshallbelessthan1minutewithambienttemperaturelessthan20°

C.

4.4.2.Powersupplyrequirements

ThepowersupplyconnectionsshouldhaveminimumDCresistance,ideally<

40mOhmstotal.

Inthecaseofdynamometerinstallationsthepowersupplyunit(PSU)shouldbechosentomanagethepeakcurrentrequirement,ieaminimumof25A.IdeallythePSUshouldbeoftheswitch-modetypeasthisisbettersuitedtotransientdemandchanges.ThesupplyshouldbelocatedascloseaspossibletotheECU(<

1.5m)tominimisevoltdrop.

4.5Enginecheckingbeforefirststart

Anenginestartattemptshouldonlybemadewith:

_anadequatefuelsupplysystem.

_afullyassembledhighpressurefuelsystem

_allthesensorsconnected

_thekeyswitchONtomaketheECUpoweron,butnostart

_allinjectorcorrectiondata(C2I)enteredintotheECU.

_faultlistbecheckedandallfaultsbeclearedbeforestartingtheengine.

Afterthefirststartoftheengine,(eitheranewengineorafterdismantlingofthefuelsystem),theengineshouldbestoppedafteraperiodofbetween1and5minutesrunningatidletocheckforfuelleaks.AvisualONLYinspectionshouldbemadeofthelowandhighpressuresystem.

5Softwarerelease

Delphiwillreleasethesoftwareatthebeginningofanewapplication.

ThelevelofthissoftwarewillbedefinedbytheEMSteamandwilldependonthesystemfunctiondefinition.

6Systemlimitsdefinition

Beforeanyfullloadtests,enginelimitsandthesystemlimitsshouldbedefinedtoguaranteesafeoperation.

6.1.Purpose

Thissubjectdescribesthesystemlimitsthatshouldbetakenintoaccountwhenanapplicationiscarriedout.

6.2.Enginelimits

Theenginelimitsmustbeknownbeforestartinganengineonatestbench.

Themostimportantvaluestoknoware:

_themaximalcylinderpressure,

_themaximalenginespeed,

_themaximaltemperaturebeforeturbine,

_themaximalintakeairtemperatureaftertheturbocharger.

Note:

alltheseitemsarecustomer’sresponsibilities.Inordertomonitorthecylinderpressure,customerneedstomachineaspecificcylinderheadtoinstallthecylinderpressuregauge.

Exceedingtheselimitscoulddamagetheengine.Someautomatedtestsbenchesareabletolookafteruser-definedlimits.

Themaximalfueldemandshouldbedefinedbeforerunningtheengineonatestbench,topreventbringatoobiginjection,whichcouldmaketheengineexceedthemaxexhausttemperatureandcylinderpressurelimitsanddamagetheengine.Thetimingsshouldalsobeconsidered:

it'

simportanttoestimatethetimingslimitsforthemultipleinjections,whichcouldcausethemaxexhausttemperatureandcylinderpressure.

6.3.FuelSystemLimits

Toguaranteethesystemoperation,somelimitsmustbetakenintoaccount.

6.3.1.Fuelcharacteristics/customer’sresponsibility

ThecommonrailsystemistobeusedwithEN590fuels,orEMC5(ie:

EN590+5%ofester).Ifothersfuels,orpoorqualityfuels,areusedthenthedurabilityofthesystemcannotbeguaranteedwithoutspecificmeasurestobedefinedwiththecustomer.

Delphireservestherighttorequestthecustomertoprovidethefuelspecification.

6.3.2.Railpressurelimits/Delphi’sresponsibility

Thedemandedpressuremustbewithinminimalandmaximallimitsthatvaryagainstspeed.Thislimitationisgeneric,specificlimitationforeachapplicationwillbeprovidedinsystemobjectivespecification.

Belowisagenericexample:

6.3.3.Fuellinglimits/Delphi’sresponsibility

Theminimumfueldemandforpilotinjectionisafunctionofrailpressure.Itisintendedtobeabletoguaranteethatatleast0.5mm³

/shotisinjectedintotheenginetakingintoaccountshot-to-shotandvariationofmeandelivery,ascontrolledbyAPC.

Belowisagenericexampleshowstheminimumdeliverylimit:

6.3.4.Pilotandmaininjectionsseparationlimits/Delphi’sresponsibility:

TakingintoaccounttheI2CandtheAPCstrategiesandlowbatteryoperation,theminimumuseableelectricseparationshouldbesetatthebeginningat1000µ

s(starttostart).

Theshownexampleisgeneric.Specificlimitationforeachapplicationwillbeprovidedinsystemobjectivespecificationtoallowmorecalibrationpossibilities.

7Nozzledefinition/customer’sresponsibility

Oncetheenginelimitsandsystemlimitsarecreated,thenextstepinthedevelopmentprocessistochoosethehydrauliccomponentswhichwillallowtheperformancetargets.

7.1.Purpose

Thefirstpurposeoftheenginebenchdevelopment

展开阅读全文
相关资源
猜你喜欢
相关搜索

当前位置:首页 > 高等教育 > 研究生入学考试

copyright@ 2008-2022 冰豆网网站版权所有

经营许可证编号:鄂ICP备2022015515号-1