欧四排放发动机知识copy

Tier4Enginesaizaixi2007@163.comDefinitionThermalenergyMechanicalworkFuelOxigen(air)内燃机CylinderNumberofcylinderes:3cylinders4cylinders5cylinders6cylinders7cylinders8cylinders12cylinders108mmcylinder1.1LX3=3.3Ldisplacement1.1LX4=4.4Ldisplacement排量Displacement压缩比DisplacementCompressionRatio压缩比与工作温度爆震压缩比冲程StrokeTwoStroke二冲程FourStroke四冲程360°完成一次做功720°完成一次做功SixStroke六冲程720°+360°完成两次做功FourStrokeIntakecompressionpowerexhaust吸气压缩做功排气做功FourStroke四冲程优劣SixStrokePowerSequence3Cyl

Crankshaft4Cyl

Crankshaft工作顺序PowerSequencePowerSequencePowerSequencePowerSequencePowerSequenceTier4GeneralDataTier4GeneralDataTier4EngineTier4EngineTier4EngineComponentsLinerCylinderHeadValvemechanismCrankshaftConrodPistonPistonRingEmission2C8H18（g）+23O2（g）→12CO2（g）+4CO（g）+18H2OFuelFeedSystemEEM4HighPressureCommonRailSystemCommonRailFeedDataRailPressureSystemEEM4RailPressureSystemHigh-PressurePump更换后排气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欧洲汽车制造协会黄色或淡黄色，清澈、透明OilSupplySystemCCV正常2.5-5bar怠速1.5bar冷却CCV-ClosedCrankshaftVentilationCCVSystemCCV-ClosedCrankshaftVentilation接增压器后进气管接空滤后增压器前进气管接油底壳接气门室罩盖通风口（呼吸器）CCV-MainComponentsCoolingSystemCoolingSystem风冷水冷CoolingWaterCoolingPackageCoolingFan挡风罩轴流式风扇WaterPumpExpansionTank产生气穴膨胀水箱多用半透明(如塑料)制成，透过箱体可直接观察到液面高度，无须打开散热器盖。膨胀水箱的上部用一个较细的软管与水箱的加水管相连，底部通过水管与水泵的进水侧相连接，通常位置略高于散热器。膨胀水箱第一次注人冷却液时，应在膨胀水箱内注人2/3的冷却液，可以保证系统的正常工作。Thermostat小循环大循环混合循环CoolingTemperatureSensorOilCoolingSystemIntakeSystemValveMechanismAirFilterIntakeSystemCCV分离气IntercoolerTurboCharge排出的废气进气管压缩机涡轮叶轮连接压缩机和涡轮的公共轴涡轮壳排气管TurboChargeBy-passTurboChargeEGRSystemEGRCoolingSystemEGRMainComponentsEGR–valveExhaustGasComponentsExhaustCause&HazardCatalyticConverterEmissionControlWords吸附器综合系统结合主动再生被动再生氧化颗粒物中的可溶性有机部分固体颗粒物EmissionControlTechnicalDOC–DieselOxidationCatalystDOC–DieselOxidationCatalystDPF-DieselParticulateFilter颗粒物（ParticulateMatter，简称PM）DPF-DieselParticulateFilterDPF-DieselParticulateFilterEmissionControlTechnicalSCR-SelectiveCatalyticReductionSCR-SelectiveCatalyticReductionSCR-SelectiveCatalyticReductionDEFSCR-SelectiveCatalyticReductionDEF-DieselExhaustFluidLNT-LeanNOxTrapN2+CO2+H2O类似汽油机三元催化器工作原理VolkswagenVolkswagenVolkswagenEmissionStandard车辆类别基准质量

（RM）KgHC+NOx限值g/km汽油柴油ⅠⅡⅢ

(HC)Ⅲ

(NOx)Ⅳ

(HC)Ⅳ

(NOx)ⅠⅡⅡ

（直喷）Ⅲ

(NOx)Ⅲ

(HC+NOx)Ⅲ

(HC+NOx)直喷Ⅳ

(NOx)Ⅳ

(HC+NOx)Ⅳ

(HC+NOx)直喷第一类/全部0.970.5000.081.360.700.900.500.560.050.250.300.025第二类1级RM13050.970.5000.081.360.700.900.500.560.050.250.300.0252级1305<RM17601.400.600