歐四排放發(fā)動(dòng)機(jī)知識(shí)copy

Tier4Enginesaizaixi2007@163.comDefinitionThermalenergyMechanicalworkFuelOxigen(air)內(nèi)燃機(jī)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(huì)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(jìn)氣管接空濾后增壓器前進(jìn)氣管接油底殼接氣門(mén)室罩蓋通風(fēng)口（呼吸器）CCV-MainComponentsCoolingSystemCoolingSystem風(fēng)冷水冷CoolingWaterCoolingPackageCoolingFan擋風(fēng)罩軸流式風(fēng)扇WaterPumpExpansionTank產(chǎn)生氣穴膨脹水箱多用半透明(如塑料)制成，透過(guò)箱體可直接觀察到液面高度，無(wú)須打開(kāi)散熱器蓋。膨脹水箱的上部用一個(gè)較細(xì)的軟管與水箱的加水管相連，底部通過(guò)水管與水泵的進(jìn)水側(cè)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(shí)，應(yīng)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(jìn)氣管壓縮機(jī)渦輪葉輪連接壓縮機(jī)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(jié)合主動(dòng)再生被動(dòng)再生氧化顆粒物中的可溶性有機(jī)部分固體顆粒物EmissionControlTechnicalDOC–DieselOxidationCatalystDOC–DieselOxidationCatalystDPF-DieselParticulateFilter顆粒物（ParticulateMatter，簡(jiǎn)稱PM）DPF-DieselParticulateFilterDPF-DieselParticulateFilterEmissionControlTechnicalSCR-SelectiveCatalyticReductionSCR-SelectiveCatalyticReductionSCR-SelectiveCatalyticReductionDEFSCR-SelectiveCatalyticReductionDEF-DieselExhaustFluidLNT-LeanNOxTrapN2+CO2+H2O類似汽油機(jī)三元催化器工作原理VolkswagenVolkswagenVolkswagenEmissionStandard車輛類別基準(zhǔn)質(zhì)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(jí)RM13050.970.5000.081.360.700.900.500.560.050.250.300.0252級(jí)1305<RM17601.400.600