ORVR和蒸发排放

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1、USEmissionRegulationORVRandEvaporativeEmission美国排放法规ORVR和蒸发排放July15th,2014Agenda议程•USregulationforORVR美国ORVR法规•ORVRtestmethodsORVR测试方法•ORVRtestequipmentORVR测试设备•CanisterDesignforORVR针对ORVR要求的碳罐设计•ORVRimplementationORVR的实施Goal:目标•ReduceSmog减少雾霾•GroundLevel

2、Ozoneistheprimarycomponentofsmogandisformedwhennitrogenoxideandhydrocarbonsareexposedtosunlight.地面臭氧是雾霾的最主要组成部分，它是当氮氧化物和碳氢化物暴露在阳光下时产生的。
HC’s+NO+Sunlight=GroundLevelOzonexUSregulationforORVR美国ORVR法规EvaporativeEmissions:Classification&Terminology分类及术语3.Runn

3、ingLoss运转损耗1.Diurnal(Bleed)日间蒸发排放Vehicledriven,HotengineVehicleparkedHotfuelreturnedtotankduetoExpansionoftankvaporduringheatfromfuelpump,exhaust,daytimeparkingFuelVaporSystemengineandroadFuelDelivery4.Refueling加油排放DisplacementofvaporsfromthefueltankFuelS

4、torage2.HotSoak热侵蚀5.Permeation渗透排放Vehiclestopped–RapidheatingoffuelDiffusionofgasolinethroughTankaftervehicleisturnedoffrubberandplasticofthefuelFueltemperatureincreasesforup1hrsystemUSRegulationforORVR美国ORVR法规OnboardRefuelingVaporRecovery车载加油油气回收•Vehicle

5、-basedcontrol;routesvaporfromvehicletanktoactivatedcarboncanister…vaporpurgedandburnedasfuelduringvehicleoperation车辆控制，将油气从燃油箱运送至碳罐，当整车运转时油气被脱附被当做燃料燃烧。•WhyORVR?为什么使用ORVR？
Thesimpleactofrefuelingiscostingus1.5gHCsperliterdispensed.加油的一个简单动作就会造成碳氢化合物排放达1.5克

6、/升。
For50litersdispensed,75gramsofvaporwhichisequivalentto100mlliquid.加50升油会产生75克油气，相当于100毫升的燃油。EvaporativeEmissionsControl-SystemFundamentals蒸发排放控制–系统基本原理•Theprimaryfunctionoftheevaporativeemissionssystemistopreventhydrocarbonsfrombeingreleasedintotheatm

7、osphereandstoretheminacanisteruntiltheycanbereintroducedintotheintakeairstreamatalatertime.蒸发排放系统的最主要功能就是防止碳氢化合物排放到大气中，这些碳氢化合物被存储碳罐中而后被进气气流引入发动机。ORVRSystemsORVR系统•Formorethan10yearsintheUS,theevaporativeemissionsystemhas2majorjobs–capturediurnalemissionsa

8、ndcapturerefuelingemissions.在美国实施长达10多年，蒸发排放系统的两种主要工作是：捕获日间蒸发排放、捕获加油排放•TheUSregulationwaswrittensothatORVRsystemisanintegratedsystem美国法规中提到ORVR系统是一个整合式系统ORVRSystemsORVR系统•IntegratedSystem-Withtheaddedresponsibilityo