歐四排放發(fā)動機知識copy

Tier4Enginesaizaixi2007@163.comDefinitionThermalenergyMechanicalworkFuelOxigen(air)內(nèi)燃機CylinderNumberofcylinderes:3cylinders4cylinders5cylinders6cylinders7cylinders8cylinders12cylinders108mmcylinder1.1LX3=3.3Ldisplacement1.1LX4=4.4Ldisplacement排量Displacement壓縮比DisplacementCompressionRatio壓縮比與工作溫度爆震壓縮比沖程StrokeTwoStroke二沖程FourStroke四沖程360°完成一次做功720°完成一次做功SixStroke六沖程720°+360°完成兩次做功FourStrokeIntakecompressionpowerexhaust吸氣壓縮做功排氣做功FourStroke四沖程優(yōu)劣SixStrokePowerSequence3Cyl

Crankshaft4Cyl

Crankshaft工作順序PowerSequencePowerSequencePowerSequencePowerSequencePowerSequenceTier4GeneralDataTier4GeneralDataTier4EngineTier4EngineTier4EngineComponentsLinerCylinderHeadValvemechanismCrankshaftConrodPistonPistonRingEmission2C8H18（g）+23O2（g）→12CO2（g）+4CO（g）+18H2OFuelFeedSystemEEM4HighPressureCommonRailSystemCommonRailFeedDataRailPressureSystemEEM4RailPressureSystemHigh-PressurePump更換后排氣FuelFilterInjectorEEM4-EngineElectricManagementECU-ElectricControlUnit12Vor24Vsupplyvoltage

154connectorpins(CV54)192connectorpins(CV41)

14digitalinputs

17analogueinputs

2xCAN-interface(SAEJ1939)InternalambientairpressuresensorInternaltemperaturesensor3internalmainrelaysCoolant-andfueltemperaturesensor5VdcsupplyvoltageLocatedincylinderhead(coolant)andonmainfuelfilterhousingNegativeTemperatureCoefficient(Sensorresistancedecreaseswhenwarmingup)Nominalresistance:at20oC=2,5kat100oC=0,186kECUconnection:1/A28analoginput2/A29groundOil-andfuelfeedpressuresensorMeasuresabsolutepressure(atmosphericpressure)5VdcsupplyvoltageOutputvoltage:at100kPa(~atmosphericpressure)=0,5Vat1100kPa=4,5V(absolutepressure)ECUconnection:PinA24;5VdcreferencesupplyPinA44;analoginputPinA57;groundVoltagebetweenA24andA57shouldbe5VdcwithoutsensorLocatedonleftsideoftheengine(oil)andonmainfuelfilterhousingRailpressuresensorMeasuresrelativepressureagainstambientairpressure5VdcsupplyvoltageOutputvoltage:at0MPa=0,5Vat200MPa=4,5VECUconnection:PinA07;5VdcreferencesupplyPinA26;analoginputPinA25;groundVoltagebetweenA07andA25shouldbe5VdcwithoutsensorLocatedonRailNotallowedtotestwithresistancemetering!Tighteningtorqueis70NmBoostpressure-/airtemperaturesensorBosch5VdcsupplyvoltageAbsolutepressuresensorTemperatureside: NegativeTemperatureCoefficient(Sensorresistancedecreaseswhenwarmingup)Nominalresistance:at20oC=2,5kat100oC=0,186kVoltagebetweenA42andA21shouldbe5VdcwithoutsensorPressureside:Outputvoltage:at100kPa(~atmosphericpressure)=1,07Vat200kPa=2,21VVoltagebetweenA21andA42shouldbe5VdcwithoutsensorSameinEEM2/EEM3/EEM4Speedsensor(crankshaft)Thecrankspeedsensorisaninductivesensor.Thesensor”reads”atriggerwheelmountedonthecrankshaftandtheECUreadspulsesgeneratedbythesensor60-2teethonwheel.Onetoothis3°incrankshaftIfthissensorisbroken,theenginecanrunwiththecamshaftsensor,butwithreducedpower1.Permanentmagnet2.Rotationspeed-/positionsensor3.Cylinderblock4.Soft-ironcore5.Pick-upcoil6.TriggerwheelSpeedsensor(crankshaft)

Thecamspeedsensorisaninductivespeedsensor.

Thesensor”reads”atriggerwheelmountedonthecamshaftandtheECUreadspulsesgeneratedbythesensor

Locatedintiminggearhousing7+1teethin7-cylinderengine6+1teethin6-cylinderengine4+1teethin4-cylinderengineIfthissensorisbroken,theenginewillrun,butwithreducedpowerandstartingmighttakelongertime3Cyl-6+1teeth4Cyl-4+1teethWiringSetsTwodifferentwiringsets:EngineVehicleSomecustomersareusingtheirownvehiclewiringset

EngineOilAmericanPetroleumInstituteAssociationdesConstructersEuropeans歐洲汽車制造協(xié)會黃色或淡黃色，清澈、透明OilSupplySystemCCV正常2.5-5bar怠速1.5bar冷卻CCV-ClosedCrankshaftVentilationCCVSystemCCV-ClosedCrankshaftVentilation接增壓器后進氣管接空濾后增壓器前進氣管接油底殼接氣門室罩蓋通風口（呼吸器）CCV-MainComponentsCoolingSystemCoolingSystem風冷水冷CoolingWaterCoolingPackageCoolingFan擋風罩軸流式風扇WaterPumpExpansionTank產(chǎn)生氣穴膨脹水箱多用半透明(如塑料)制成，透過箱體可直接觀察到液面高度，無須打開散熱器蓋。膨脹水箱的上部用一個較細的軟管與水箱的加水管相連，底部通過水管與水泵的進水側相連接，通常位置略高于散熱器。膨脹水箱第一次注人冷卻液時，應在膨脹水箱內(nèi)注人2/3的冷卻液，可以保證系統(tǒng)的正常工作。Thermostat小循環(huán)大循環(huán)混合循環(huán)CoolingTemperatureSensorOilCoolingSystemIntakeSystemValveMechanismAirFilterIntakeSystemCCV分離氣IntercoolerTurboCharge排出的廢氣進氣管壓縮機渦輪葉輪連接壓縮機和渦輪的公共軸渦輪殼排氣管TurboChargeBy-passTurboChargeEGRSystemEGRCoolingSystemEGRMainComponentsEGR–valveExhaustGasComponentsExhaustCause&HazardCatalyticConverterEmissionControlWords吸附器綜合系統(tǒng)結合主動再生被動再生氧化顆粒物中的可溶性有機部分固體顆粒物EmissionControlTechnicalDOC–DieselOxidationCatalystDOC–DieselOxidationCatalystDPF-DieselParticulateFilter顆粒物（ParticulateMatter，簡稱PM）DPF-DieselParticulateFilterDPF-DieselParticulateFilterEmissionControlTechnicalSCR-SelectiveCatalyticReductionSCR-SelectiveCatalyticReductionSCR-SelectiveCatalyticReductionDEFSCR-SelectiveCatalyticReductionDEF-DieselExhaustFluidLNT-LeanNOxTrapN2+CO2+H2O類似汽油機三元催化器工作原理VolkswagenVolkswagenVolkswagenEmissionStandard車輛類別基準質量

（RM）KgHC+NOx限值g/km汽油柴油ⅠⅡⅢ

(HC)Ⅲ

(NOx)Ⅳ

(HC)Ⅳ

(NOx)ⅠⅡⅡ

（直噴）Ⅲ

(NOx)Ⅲ

(HC+NOx)Ⅲ

(HC+NOx)直噴Ⅳ

(NOx)Ⅳ

(HC+NOx)Ⅳ

(HC+NOx)直噴第一類/全部0.970.5000.081.360.700.900.500.560.050.250.300.025第二類1級RM13050.970.5000.081.360.700.900.500.560.050.250.300.0252級1305<RM17601.400.600