《轮机英语轮机长大管轮》-Lesson 41 AutoChief C20 Propulsion Control System

NewWordsandExpressionstelegraph['telɪgrɑːf]n.[航海学]车钟manoeuvre[mə'nuːvə]vt.操纵控制wheelhouse['wiːlhaʊs]n.驾驶室，舵手室reverse[rɪ'vɜːs]n.背面，相反，倒退speed-set

引擎governor['gʌv(ə)nə]n.调节器comply[kəm'plaɪ]vi.遵守，顺从，遵从，答应periodically[,pɪərɪ'ɒdɪkəlɪ]adv.定期地，周期性地，间歇NewWordsandExpressionsconform[kən'fɔ:m]vi.遵照，适应，顺从，一致module['mɒdjuːl]n.模块，组件，模数incorporate[ɪn'kɔːpəreɪt]vt.包含，吸收，加入hardware['hɑ:dwεə]n.金属构件，金属制品multifunction[,mʌltɪ'fʌŋkʃən]n.多功能，多用途，一体机graphically['græfɪkli]adv.生动地，活灵活现地console[kən'səʊl]n.控制台，操纵台transmit[trænz'mit;]vt.传导，传递，传达，输送NewWordsandExpressionsnavigation[nævɪ'geɪʃ(ə)n]n.航行，航海astern[ə'stə:n]adv.[航海学]在船的后面，在(或向)船的尾部interface['intəfeis]n.界面，分界面，交界potentiometer[pə(ʊ),tenʃɪ'ɒmɪtə]n.电位计，分压计accessory[ək'ses(ə)rɪ]n.配件；附件destruction[di'strʌkʃən]n.破坏，消灭，毁灭sequence['si:kwəns]n.连续，接续distinct[dɪ'stɪŋ(k)t]adj.明显的，独特的，清楚的NewWordsandExpressionspermanent['pɜːm(ə)nənt]adj.永久的，永恒的，不变的simultaneously[,sɪml'teɪnɪəslɪ]adv.同时地excessive[ɪkˈsesɪv]adj.过多的，极度的，过分的

Fig.1ComponetoverviewoftheAutoChief®C20propulsioncontrolsystemTheAutoChief®C20PropulsionControlSystemisdesignedforremotecontrolofthemainenginefromthecombinedtelegraphandmanoeuvringleverinthewheelhouse.Bymovingthislever,thesystemwillautomaticallystart,reverse,stopandspeed-setthemainengine.ThemaincomponentsoftheAutoChief®C20PropulsionControlSystemare:ControlpanelsRemotecontrolsystemEnginetelegraphsystemEnginesafetysystemDigitalgovernorsystemManoeuvringrecorderDistributedprocessingunitsThecontrolpanelisdesignedforeasyoperation.Anadvancedyetsimpletousemultifunctioncontrollergivesaccesstoallsystemfunctions.Informationisprovidedonlywhenneededtokeepoperationsimple.Acolourdisplaypresentskeyinformationgraphicallyforeasyunderstanding.Customdesignedmimicpicturesareavailableforeachenginetype,andallmainvariablessuchasRPM,startairandscavengingairpressure,enginestateetc.arealwaysavailable(设计定制的模拟图像可用于各种主机类型，诸如转速、启动空气和扫气压力、主机状态等所有主要变量均都始终可用).Thecontrolpanelcanbeinstalledintoanystandardconsole.Todistinguishbetweenusergroupsseverallevelsofcontrolareavailable.Essentially,anEngineTelegraphSystemisdesignedtocontroltheengineandcomprisesanAutoChief®C20LeverTelegraphUnit(LTU)atthefollowinglocations:BridgeControlroomTheAutoChief®C20LeverTelegraphUnit(LTU)isacombinedtelegraph&manoeuvringleverwithtelegraphhandleandemergencystopswitch.InadditiontotheLeverTelegraphUnit,anotherunitprovidesasimplesubtelegraphsystemfortheengineroom.ThePushButtonTelegraph(PBT)enablesanoperatortotransmit/receivemessagesbetweenthebridge,controlroomandengineroom.Thefollowingstandardfunctionsareavailableasexplainedabove:EngineTelegraphModes:EngineTelegraphControlLocationEngineTelegraphStatusEmergencyStopThefollowingtelegraphdivisionsareprovidedbypushbuttonswithindicators:Ahead:D.Slow,Slow,Half,Full,NavigationFullStopAstern:D.Slow,Slow,Half,Full,EmergencyAsternTheremotecontrolsystemisequippedwithasemi-automaticcontrolsystemwhileoperatingincontrolroomcontrol.TheseparatecontrolsystemconsistsofaleverwhichisdirectlyconnectedtotheMainEngineInterfaceunit.ThelevercontainsswitchesforAhead,AsternandStop.AdditionallyitincludesapotentiometerwhichprovidesaspeedsetsignaltotheMEI.Thefollowingdivisionsareprovided:Ahead:StartAhead,Speed-set1–10aheadStopAstern:StartAstern,Speed-set1–10asternTheindicationpanelunitislocatedintheenginecontrolroomconsole.Themainfunctionsincludedaredirectindicationofengine,enginesub-systemsandcontrolofauxiliaryblowers.RemotecontrolsystemfunctionsStartblockAslongasanyofthebelowmentionedconditionsisactivetheengineisinhibitedforstarting.StartingthemainengineIftheengineispreparedforstarttheengineisstartedautomaticallyinahead(orastern)directionfromsimplybysettingthebridgehandlefromstoptoanypositioninahead(orastern)direction.RemotecontrolsystemfunctionsRPMlimitersForprotectingtheengineanditsaccesoriesagainstthermalstressanddestructionandunnecessarywearandtearsomefixedRPMLimitersareincludedinthesystem.ManualRPMLoadprogramAccelerationlimiterMinimumRPMSlowDownBarredspeedrange/CriticalRPMlimiterShaftGeneratorcontrolmodeRemotecontrolsystemfunctionsTheengineisreversedautomaticallytoahead(orastern)directionfrombridgebysettingthebridgehandlefromstoptoanypositioninahead(orastern)direction.Reversingsequencewillbecarriedoutpriortothestartingsequence.Iftheengineisrunningabovethebrakeairlevel,brakeairwillbesuppliedwhenenginehasreacheddowntobrakeairlevel,inordertoperformthereversingsequenceasfastaspossible(如果主机正运行在制动空气水平以上，那么当主机降低到制动空气水平之下时，制动空气应被供应，以便尽可能快地执行换向过程).RemotecontrolsystemfunctionsCrashmanoeuvringmeansquickreversingoftheenginefromaheadtoastern.It’susedinemergencysituation,whenthebridgeleverismovedfromfullaheadtofullasternposition.Movethebridgeleverfromfullaheadtofullasternposition."crashastern"indicationonbridgeandcontrolroomACP.Stopsignalwillbegiventomainengine.EnginespeedwillreducetobrakeairlevelEnginewillbereversed,andstartairwillbesuppliedHeavystartandcancellimiterssignalswillbegiventothegovernor.Whenthespeedreachesthefuel/startairchangelevelinasterndirection,thestartairwillbeswitchedoff,andfuelwillbesupplied.RemotecontrolsystemfunctionsStoppingthemainengineTheengineisstoppedautomaticallybysettingthebridgehandletoSTOPposition.Thestopsolenoidvalveisactivated,andstopsignalisgiventogovernortosetthefuelrackinzeroposition.Asabackupforthestopfunction,emergencystopswitchesareprovidedonthetelegraphpanelinbridgeandcontrolroom(andontheenginesidecontrolbox),hardwireddirectlytosafetysystem(作为备用的停车功能，在驾驶台和控制室（以及主机侧控制箱）的车钟面板上提供紧急制动开关，以直接连接到安全系统).RemotecontrolsystemfunctionsLoadChangeDependantCylinderLubricationFunctionThisfunctionallowsforadditionalcylinderlubrication.Theconditiontogiveextracylinderlubricationiswhenadistinctandpermanentloadchangeisdetected.CCO,CylindercutoutfunctionThisfunction’smainpurposeistoimprovethestabilityofrpmwhentheengineisoperatedatlowloadandrpm.Thesystemiscuttingtheoperationofcylindersingroups,normally2.RemotecontrolsystemfunctionsMeaningthatduringthisoperationonlyhalfofthecylinderswillbeinoperationsimultaneously.Theoperationofthecylindergroups(Group1and2)isalternatingonatimebasis.Thereasonistoavoidexcessiveamountsofcylinderlubricatingoilasthesurplusoilisburned.Anotherreasonisforkeepingthesamethermalloadonallcylinders.Inordertoobtainasafestartthe