NewWordsandExpressionsparallel[?p?r?lel]a.并行的ohm[??m]n.歐姆（電阻單位）resistor[r??z?st?(r)]n.電阻，電阻器panel[?p?nl]n.面板Arcnet

令牌總線網(wǎng)cable[?ke?bl]n.電纜spool[spu?l]n.線軸，軸calibrate[?k?l?bre?t]v.標(biāo)定，校準(zhǔn)NewWordsandExpressionsfeedback[?fi?db?k]n.反饋ECSEngineControlSystem

發(fā)動(dòng)機(jī)控制系統(tǒng)MOPMainOperationPanel

主操作面板MPCMultiPurposeController

多用途控制器ECREngineControlRoom

集控室EICUEngineInterfaceControlUnit

發(fā)動(dòng)機(jī)界面控制單元ECUEngineControlUnit

發(fā)動(dòng)機(jī)控制單元CCUCylinderControlUnit

氣缸控制單元NewWordsandExpressionsACUAuxiliaryControlUnit

輔助控制單元RCSRemoteControlSystem

遙控系統(tǒng)FIVAFuelInjectionValveActuation

燃油噴射閥，噴油閥驅(qū)動(dòng)PleaserefertoFig.9-1fortheoverallconfigurationoftheEngineControlSystem.Afterthatisabriefdescriptionofthemaincomponents.TheArcnetcontrolnetworkisusedbytheECS,whichtransferssignalsbetweeneachMPC.Tworedundantnetworksarerunninginparallel,onebeingahotbackupfortheother(兩個(gè)冗余的網(wǎng)絡(luò)并聯(lián)運(yùn)行，一個(gè)作為另一個(gè)的熱備份).The120ohmsterminationresistorislocatedatbothendsofeachnetworkconnections.TheresistorsfornetAarelocatedatMOPBandECUBJ65respectively,theresistorfornetBatMOPAandECUAJ65.9.1NETWORKMainOperationPanelisthehumanmachineinterface.Wecancarryoutenginecommands,adjusttheengineparameters,selectenginerunningmodes,observethestatusofthecontrolsystemanddoservicejobetc.However,therunningoftheengineisnotdependantontheMOP,becausethecommands/ordersarecommunicateddirectlybetweentheMPCs.但是，發(fā)動(dòng)機(jī)的運(yùn)行并不依賴MOP（主操作面板），因?yàn)橹噶?命令直接在MPC（多用途控制器）之間傳輸。9.2MOPEICUistheinterfacebetweenECSandexternalsystemssuchasAMS,PMSandRemoteControl/SafetySystemetc,showninFig.9-2.EICUreceivesnavigationalcommands,suchasspeedsetpoint,directionofenginerotation,increaselimitationandslowdowncommandetc,fromtheRemoteControlsystem.Therawspeedsetpointisfilteredbythespeedpre-processorintheEICU,suchasLoadprogram,Slowdownspeed,Minspeed,Maxspeed,PTOandBarredspeedrangeetc(原始速度設(shè)定值被EICU（發(fā)動(dòng)機(jī)界面控制單元）中的速度預(yù)處理器過(guò)濾處理，例如負(fù)荷加載程序(速度限制)，減速速度，最低速度，最高速度，軸帶輸出（速度）和禁用速度區(qū)等等).Thenthepre-processedspeedsetpointisavailableonArcnetfortheECU.Uponreceivingslowdowncommand,EICUwillsendthepresetslowdownspeedsetpoint(41.6RPM)toECU.ThetworedundantEICUunitsoperateinparallel,onebeingahotbackupfortheother.9.3EICUECUimplementsthefunctionsofthetraditionalgovernorandotherfunctionsrequiredbyMEtypeengine,e.g.hydraulicpressuresetpoint.TheamountoffuelinjectioniscalculatedherebyECUbasedonvariousfuellimiters,suchasscavengeairlimiter,torquelimiteretc(這里噴油量由ECU（發(fā)動(dòng)機(jī)控制單元）基于各種燃油限制計(jì)算出來(lái)，例如掃氣空氣限制，扭矩限制等).Thetimingparametersforfuelinjectionandexhaustvalve,thecylinderlubricationfeedratearecalculatedalsoinECUandthenallthecalculatedresultsaresenttoCCUviaArcnet.Likewise,thecalculatedhydraulicpressuresetpointissenttoACU.9.4ECUCCUreceivesthevaliddata,suchasfuelinjectionamount,timing,cylinderlubricationfeedrateetc,fromECUviaArcnet.Atthecorrectstartangletheinjectionisinitiatedandcontrolledaccordingtothefuelamountcommand.Whentheinjectioniscompleted,theexhaustvalveopenandclosecontrolsignalisthenactivatedandCCUensuresthecorrectexhaustvalveopen/closeprocesshasbeencarriedout.ThecylinderlubricatorisactivatedbyCCUaccordingtothefeedrateamountreceivedfromtheECU.9.5CCUIntheeventofafailureoftheCCUforonecylinder,thiscylinderwillautomaticallybeputoutofoperation.Tokeepcylinderlubrication,connectthelubricatorsolenoidvalvetoECUJ52bysparespecialrunningcable(為了保持氣缸潤(rùn)滑，通過(guò)備用的特殊的電纜把氣缸注油器的電磁閥連接到ECU（發(fā)動(dòng)機(jī)控制單元）的J52上).ThenthecylinderlubricatorwillbeactivatedbyECUrandomly.9.5CCUACUcontrolsthepressureoftheHydraulicPowerSupplysystemandtheelectricalstart-uppumpsusingthe‘PressureSetpoint’givenbytheECUasareference.Furthermore,thestartandstopoftheauxiliaryblowersarecontrolledaccordingtothescavengeairpressure.ThecontroloftheauxiliaryequipmentontheengineisnormallydividedamongthreeACUssothat,intheeventofafailureofoneunit,thereissufficientredundancytopermitcontinuousoperationoftheengine.9.6ACU9.7InterfacebetweenECSandRCSAtbridgecontrol,thespeedsetpointandothernavigationalcommandsaresentfromremotecontrolsystemtoECSviaRS485serialcommunicationchannel(EICUJ68).Theslowdowncommandisalsotransferredviathisport,i.e.softwarewise.AtECRcontrol,thespeedsetpointsignal(4-20mA)isconnectedtoEICU(J27)directly.Theslowdownfunctionworksinthesamewayasunderbridgecontrol.Atlocalcontrol,thespeedsetpointsignal(4-20mA)isconnecteddirectlytoECU,sotheslowdownfunctioniscancelled.Theshutdownfunctionishardwarewiseandalwayseffectiveunderwhatevercontrolstation.9.7InterfacebetweenECSandRCS9.8FIVABasedonthefuelinjectionamountandexhaustvalveopen/closetiming,theCCUsendstherequiredFIVAvalvemainspoolpositionsignaltotheFIVAvalve(seeFig.9-3).TheFIVAvalveisaproportionalvalvewhichcontrolsthehydraulicoilflowratetotheHydraulicCylinderUnit.Theoilflowzeropoint(30L/min)andthemainspoolzeropositionarecalibratedaccuratelybyCWATandMBDrespectively.ThemainspoolactualpositionfeedbackismonitoredbyCCUcontinuously.Ifunexpectedvalueisreceived,theCCUwillinhibittheoperationoftheFIVAvalveinquestion,thuscorrespondingcylinderwillbeputoutofoperationandslowdowncommandisreleased.如果接收到意外值，CCU（氣缸控制單元）將會(huì)禁止故障的FIVA閥動(dòng)作，相應(yīng)氣缸將停止運(yùn)行并發(fā)出減速指令。9.8FIVAThefuelplungerpositionsensorisalsoadopted,whichisusedforsupervisingofthefuelplungermovement.Ifunexpectedpositionencountered,analarmwillbereleased,butnoslowdowncommandreleased.Theexhaustvalvepositionsensorisusedfortheexhaustvalveopen/closecontrol.Basedonthepositionfeedback,theCCUensurestheexhaustvalvehasbeenopenedorclosedjustincorrecttiming.Ifunexpectedfeedbackencountered,thiscylinderwillbeputoutofoperationandslowdowncommandisreleased.9.8FIVA

Exercises1.

implementsthefunctionsofthetraditionalgovernor.A.ECU B.CCUC.ACU D.MOP2.

,thespeedsetpointsignal(4-20mA)isconnecteddirectlytoECU,sotheslowdownfunctioniscancelled.A.Atbridgecontrol B.AtECRcontrolC.Atlocalcontrol D.alloftheaboveAC

Exercises3.________receivesthevaliddata,suchasfuelinjectionamount,timing,cylinderlubricationfeedrateetc,fromviaArcnet.A.ECUCCU B.ACUCCUC.CCUECU D.CCUACU4.Ifunexpectedpositionof

encountered,analarmwillbereleased,butnoslowdowncommandreleased.A.mainspoolofFIVAvalve B.fuelplungerC.exhaustvalve D.alloftheaboveCB