瓦锡兰主机RT-flex资料之一(彩色)课件.ppt

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1、TrainingMakesADifference@WärtsiläTrainingCenterWinterthur/issue01.2005/hkMechanicalFeaturesSupplyunitonFUEL-sideRailUnitincl.WECS-9520SupplyunitonEXH-sideAutomaticFilerCrankanglesensordrive(freeendside)TrainingMakesADifference@WärtsiläTrainingCenterWinterthur/i

2、ssue01.2005/hkRailUnitTrainingMakesADifference@WärtsiläTrainingCenterWinterthur/issue01.2005/hkPreviousandnewdesignofRailUnit(RU)RailUnitRe-designedRailunitE95.nBoxeswithWECS-9520modulesinthefrontofRUE90andE95.nBoxeswithWECS-9520modulesunderneathRUTrainingMakes

3、ADifference@WärtsiläTrainingCenterWinterthur/issue01.2005/hkNewDesignRailUnitFueloilrail:Thefuelrailcontainshighpressurefuelof~600-900bardeliveredbythefuelpumpsofthesupplyunitduringengineoperation.Therailpressureisregulateddependingonengineload.Foreachcylinder,

4、thereisanInjectionControlUnit(ICU)installedonthefuelrail.TheICUsareactuatedbyhelpofservooilpressureviahydr.HP-hoses.WECSisactivatingtheICUsforinjectioncontrol.Therailisheatedbyatraceheatingpipingsystem.Servooilrail:Theservooilrailcontainsfinefiltered(6-micron)h

5、ighpressureservooil,~80-190bar,deliveredbytheservooilpumpsofthesupplyunit,dependingonengineload.ForeachcylinderthereisaValveControlUnit/exhaustvalveactuatorinstalledontheservooilrail.WECSisactivatingtheVCUsforexh.valvecontrol.Thehighpressurerailsofnewdesignarem

6、adeofsinglepipes.Theonesofolddesignrailofrailpipesections.FuelrailServooilrailICUsVCUsTrainingMakesADifference@WärtsiläTrainingCenterWinterthur/issue01.2005/hkNewDesignRailUnitAdditionalreturn/leakagepiping:-Onefuelleakagepipe(backtooverflowtank)-Onecommonservo

7、oilreturnpipe(backtocrankcase)-Traceheating(steamorthermooil)Fuelsystemoverpressurevalves:-SHDandoverpressureregulatingvalve.Openingpressureapprox.1050Barforoverpressureregulation.TheSHD-solenoidisactivatedbySafetySystemtodepressurizethefuelsystem.(fueldrainedt

8、oreturnpipetoboosterunit).-Safetyvalve.Openingpressure1250Bar.(fueldrainedtooverflowtank).SafetyvalveSHDandoverpressureregulatingvalveFuelleakagepipeTraceheatingServooilretu