LXE Engine Control System.docx
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LXEEngineControlSystem
Firstlistthemaincomponentsoftheenginecontrolsystem
EICUTheEICUreceivenavigationalinputfromthecontrolstations.
Themainnavigationalcommandisthespeedsetpoint（requestedspeedanddirectionofenginerotation）.
IntheEICUstherawspeedsetpointisprocessedbyaseriesofprotectivealgorithms.Theseensurethatthespeedsetpointfromwhichtheengineiscontrolledisneverharmfultotheengine.Anexampleofsuchanalgorithmisthe‘barredspeedrange’
NowtheprocessedspeedsetpointsignalandtheselectedenginerunningmoderequestareavailableviathecontrolnetworktobeusedbytheECUsasareferenceforthespeedcontrolandenginerunningmodecontrol.
FromtheinstructionmanualweknowthemaininterfacefortheEICU.
Duringshaftgeneratorrun.
Plunger
INFO
ID
Function
J1?
?
?
Powersupply
J23
DI,OFF
2142-A/B
IncreaselimitfromECR
J24
DI,OFF
2205-A/B
Slowdownpre-warning
J27
AI,
2140-A/B
SpeedsetECR
J32
DI,OFF
2141-A/B
StopCmd.ECR
J34
DI,OFF
2143-A/B
TakecommandECR
J37EICU-B
AI,
2904-B
ECSisolation（kOhm）
J40
DI,ON
1190-A/B
Shaftgeneratorrequest
J48
DO,OFF
2128-A/B
ECRCmd.takeover
J49
DO,OFF
2170-A/B
Loadlim.IndicatedBridge
J52
DO,OFF
2210-A/B
Enginestopped
J53
DO,OFF
2180-A/B
Loadlim.IndicatedECR
J60
DO,OFF
2021-A/B
Cancelableshutdown
J70
AO,
21830-A/B
AnalogengineRPMOutput
J71
AO
21841
Calc.Gov.Index
J80
DO,ON
1191-A/B
Shaftgeneratorpermission
J81
DO,OFF
2020-A/B
Non-cancelableshutdownsignal
J82
DO,OFF
2005-A/B
Slowdownrequest
J83
DO,ON
2130-A/B
Cmd.RundirectionAhead
J84
DO,OFF
2131-A/B
Cmd.RundirectionAstern
ECU
Theenginespeedcontrolrequiresthattheamountoffueliscalculatedforeachcylinderfiring.Thecalculationmadebythespeedcontroller（ECU）isinitiatedinrelationtothecrankshaftposition,sothattheexecutionisstartedjustintimetomakethefuelinjection.Thisiscontrolledbythetachofunction.
Theoutputfromthespeedcontrollerisa‘requestforfuelamount’tobeinjectedforthenextcombustion.Thisrequestisrunthroughdifferentprotectivealgorithms‘thefuellimit’andthe‘resultingamountoffuelcommand’isproduced.
Basedonthealgorithmoftheselectedenginerunningmode,theinjectionprofileisselected,thetimingparametersforthefuelinjectionandexhaustvalvearecalculatedandthepressuresetpointforthehydraulicpowersupplyderived.
Theresultingamountoffuelcommand,therequestedfuelinjectionprofileandthetimingparametersareallsenttoCCUofthecylinderinquestionviathecontrolnetwork.Likewise,thehydraulicpressuresetpointissenttoallACUS.
Forredundancypurposes,thecontrolsystemcomprisestwoECUsoperationinparallelandperformingthesamework,onebeingahotstand-byfortheother.IfoneoftheECUsfail,theotherunitwilltakeoverthecontrolwithoutheinterruption.
FromtheinstructionmanualweknowthemaininterfacefortheECU
Plunger
INFO
ID
Function
J21
DI,OFF
2152-A/B
LocalIncreaselimiter
J22
DI,ON
2151-A/B
LocalStop
J23
DI,OFF
2114-A/B
LocalAirrun
J24
DI,OFF
2115-A/B
LocalSlowturn
J25
DI,OFF
2153-A/B
LocalTakecommand
J26
AI
1006
LocalSpeedSet
J32
DI,OFF
1117-A/B
Blockedstartairdistribution
J34
DI,OFF
2001-A/B
Shutdown
J35
AI,
8601-A/B
Scavengeairpressure
J40ECUA/B
DI,Fa/Tu
4001-A
MarkermasterfromTSA-A
J41ECUA/B
DI,Fa/Tu
4002-A
MarkerslavefromTSA-A
J42ECUA/B
DI,Fa/Tu
4003-A
QuadraturemasterfromTSA-A
J43ECUA/B
DI,Fa/Tu
4004-A
QuadratureslavefromTSA-A
J44ECUA/B
DI,Fa/Tu
4001-B
MarkermasterfromTSA-B
J45ECUA/B
DI,Fa/Tu
4002-B
MarkerslavefromTSA-B
J46ECUA/B
DI,Fa/Tu
4003-B
QuadraturemasterfromTSA-B
J47ECUA/B
DI,Fa/Tu
4004-B
QuadratureslaverfromTSA-B
J52ECUA/B
DO,N/A
011501
Lubricatorbackupsignal
J61
DO,OFF
2005-A/B
Resetshutdown
J70ECUA
AO,
2184
Governorindex
J70ECUB
AO,
8502
Rawunsig.speed
J71ECUA
AO,
8501
Startairpressure
J71ECUB
AO,
1250
Hydraulicpressure
J80
DO,OFF
1114
Slowturnvalue
J81ECUA
DO,OFF
1217-4
Drivenpump4AH/AS
J81ECUB
DO,OFF
1217-5
Drivenpump5AH/AS
J82
DO,OFF
1121-A/B
Mainstartairvalue
J83
DO,OFF
2206-A/B
Slowdownlocalindication
J84
DO,OFF
2154-A/B
Localtakecommand
J85
DO,OFF
2159-A/B
Increaselimitindication
CCU
Inappropriatetimeforthenexttimefiring,theCCUensurethatithasreceivednewvaliddata.Whereaftertheinjectionprofilestartangleissetupusingthetachofunction.Onthecorrectstartangletheinjectionisinitialedandiscontrolledaccordingtothefuelamountcommandandtheinjectionprofilecommand.
Wheninjectioniscompleted,theexhaustopenandcloseanglearesetupusingthetachofunctionandtheexhaustvalvecontrolsignalisthenactivatedontheappropriatecrankangles.
AlloftheCCUsareidentical,andintheeventofafailureoftheCCUforonecylinderonlythiscylinderwillautomaticallybeputoutofoperation.
FromtheinstructionmanualweknowthemaininterfacefortheCCU
Plunger
INFO
ID
Function
J1
PowersupplyforMPCboard
J9
PowersupplyforcylinderFIVAamp.
J20
DI,ON
4105
ElFi/FiVaAmplifierOK
J21
DI,OK
8285
CylinderLubeoillevel
J30
AI,
4102
ElFi/FiVapositionfeedback
J31
AI
4114
Fuelpumpplungerposition
J32
DI,OFF
2002_
Shutdownsafetysystem
J33
AI
4106
ElFi/FiVaAmp.Actualcurrent
J34
AI
4111
Exhaustvalveposition
J35
AI
3030
Noisedetection
J40
DI,Fa/Tu
4001-A
MarkermasterfromTSA-A
J41
DI,Fa/Tu
4002-A
MarkerslavefromTSA-A
J42
DI,Fa/Tu
4003-A
QuadraturetachomasterfromTSA-A
J43
DI,Fa/Tu
4004-A
QuadraturetachoslavefromTSA-A
J44
DI,Fa/Tu
4001-B
MarkermasterfromTSA-B
J45
DI,Fa/Tu
4002-B
MarkerslavefromTSA-B
J46
DI,Fa/Tu
4003-B
QuadraturetachomasterfromTSA-B
J47
DI,Fa/Tu
4004-B
QuadraturetachoslavefromTSA-B
J50
DO,N/A
112001
Startairpilotvalve
J51
DO,N/A
011601
Lubricatorpilotvalve
J52
DI,N/A
0117
CylinderLubricatorfeedback
J60
DO,ON
4104
ElFi/FiVaAmplifierenable
J70
AO
4107V
ElFi/FiVaValvecontrol
J71
AO
3031
Noisepulsecounter
排气阀的位置信号是用来控制阀的开关的，当其检测不到信号或者信号没有达到系统要求的排气阀的高度那么就会有SLOWDOWN信号发出。
排气阀的对应的检测信号的值为13.6MM/MA就是每移动13.6毫米对用的信号就变化1MA。
在系统中要求最低是开启66MM。
所以变化超过5MA系统就认为正常。
Fuelplungerpsitionsensorisformonitoring.
ForcontrollingFIVAvalveistheFIVAfeedbacksignal.BecausetheinjectionamountoilcanbecalculatedbytheFIVAmainspoolmovedistance.
ACU
TheACUscontrolthepressureofthehydraulicpowersupplysystemandtheelectricalstart-uppumpsusingthe‘pressuresetpoint’givenbytheECUsasareference.Furthermorethestartandstopoftheauxiliaryblowersarecontrolledaccordingtothescavengeairpressure.
ThecontroloftheauxiliaryequipmentontheengineisnormallydividedamongthreeACUssothat,intheeventofafailureofoneunit,thereissufficientredundancytopermitcontinuousoperationoftheengine.
FromtheinstructionmanualweknowthemaininterfacefortheEICU
Plunger
INFO
ID
Function
J1
Powersupply
J20ACU1/2/3
DI,ON
1224-1/2/3
Proportionvalveamplifier
J21ACU1/2
DI,OFF
1111-A/B
Mainstartvalveblocked
J22ACU1/2
DI,OFF
1110-A/B
Turninggearengaged
ACU3
AI
1233
Doublepipepressure（bar）
J23ACU1/2
DI,ON
1109-A/B
Turninggeardisengaged
J24ACU1/2
DI,ON
1112-A/B
Mainstartvalveinservice
J25ACU1/2
DI,ON
1116-A/B
Startairdistributioninservice
J26ACU1
DI,OFF
2158-A
LamptestforLOP
J27ACU1
DI,OFF
1236bypass
Hydraulicleakageshutdownlevel
ACU2
DI,OFF
1235
Hydraulicleakagealarmlevel
ACU3
DI,ON
8775-3?
?
Compressorvalveopen
J30ACU1
AI
1238-1
Proportionalvalvefeedback
ACU2
AI
1238-2
Proportionalvalvefeedback
ACU3
AI
1238-3
Proportionalvalvefeedback
J31ACU1
AI
1201-1
Hydraulicpressure（bar）
ACU2
AI
1201-2
Hydraulicpressure（bar）
ACU3
AI
1201-3
Hydraulicpressure（bar）
J32ACU1
AI
1204-1
Lube.Oilpressure（bar）for1pump
ACU2
AI
1204-2
Lube.Oilpressure（bar）for2pump
ACU3
AI
1204-3
Lube.Oilpressure（bar）for3pump
J33ACU2
AI
1204-4
Lube.Oilpressure（bar）for4pump
ACU3
AI
1204-5
Lube.Oilpressure（bar）for5pump
J34ACU1
AI
1222-1
Swashplatepositionfeedback
ACU2
AI
1222-2
Swashplatepositionfeedback
ACU2
AI
1222-3
Swashplatepositionfeedback
J35ACU3
DI,OFF
8776-3
Compressorvalveclosed
J36ACU1/2
AI
8503-A/B
Controlairpressure（bar）
ACU3
DI,ON
8777-3
Turbinevalveopen
J37ACU1/2
AI
8501-A/B
Startingairpressure（bar）
ACU3
DI,OFF
8778-3
Turbinevalveclosed
J40ACU1
DI,ON
8621-1
Blower1remoteOP./Poweron
ACU2
DI,ON
8621-2
Blower2remoteOP./Poweron
ACU3
DI,ON
8621-3
Blower3remoteOP./Poweron
J41ACU1
DI,OFF
8623-1
Blower1running
ACU2
DI,OFF
8623-2
Blower2running
ACU3
DI,OFF
8623-3
Blower3running
J42
DI,ON
8621-4
Blower4remoteOP./Power
J43
DI,OFF
8623-4
Blower4running
J44ACU1/2
DI,ON
1212-A/B
RemoteOP./Poweron（startuppump）
J45ACU1/2
DI,OFF
1213-A/B
Startuppumprunning
J47ACU1
DI,ON
ASUP
Suplnp.Systembypassopen
ACU3
DI,ON
BSUP
Suplnp.Systembypassopen
J48ACU1
DO,ON
1223-1
Proportionvalveamplifierenable
ACU2
DO,ON
1223-2
Proportionvalveamplifierenable
ACU3
DO,ON
1223-3
Proportionvalveamplifierenable
J49
DO,OFF
2106-A
Loadlimitation
J50
DO,OFF
2107-A
Startfailure
J51
DO,OFF
1264-A
Aux.blowerswarning
J52
DO,OFF
1263-A
Aux.blowersrunning
J53
DO,ON
218
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