Urea filler neck and urea tank for prevention of urea overflow ...

A urea filler neck for preventing a urea overflow includes a filler housing forming a urea path in which urea flows to a urea tank. US9644518B2-Ureafillerneckandureatankforpreventionofureaoverflowandureaafter-treatmentsystemwithoutsidefillerneck -GooglePatents Ureafillerneckandureatankforpreventionofureaoverflowandureaafter-treatmentsystemwithoutsidefillerneck DownloadPDF Info Publicationnumber US9644518B2 US9644518B2 US14/559,433 US201414559433A US9644518B2 US9644518B2 US9644518B2 US9644518B2 US201414559433A US201414559433A US201414559433A US9644518B2 US9644518B2 US9644518B2 Authority US UnitedStates Priorartkeywords urea housing injectiongun injection filler Priorartdate 2014-07-07 Legalstatus(Thelegalstatusisanassumptionandisnotalegalconclusion.Googlehasnotperformedalegalanalysisandmakesnorepresentationastotheaccuracyofthestatuslisted.) Active,expires2035-05-26 Applicationnumber US14/559,433 Otherversions US20160003122A1 (en Inventor Chang-HoHam Pil-SeonChoi Dong-MyoungRyoo Young-JaeLim Myung-KeunCHAE CurrentAssignee(Thelistedassigneesmaybeinaccurate.Googlehasnotperformedalegalanalysisandmakesnorepresentationorwarrantyastotheaccuracyofthelist.) HyundaiMotorCo KoreaFuelTechCorp OriginalAssignee HyundaiMotorCoKoreaFuelTechCorp Prioritydate(Theprioritydateisanassumptionandisnotalegalconclusion.Googlehasnotperformedalegalanalysisandmakesnorepresentationastotheaccuracyofthedatelisted.) 2014-07-07 Filingdate 2014-12-03 Publicationdate 2017-05-09 2014-07-07 PrioritytoKR1020140084292A priority Critical patent/KR101567229B1/en 2014-07-07 PrioritytoKR10-2014-0084292 priority 2014-12-03 ApplicationfiledbyHyundaiMotorCo,KoreaFuelTechCorp filed Critical HyundaiMotorCo 2014-12-03 AssignedtoHYUNDAIMOTORCOMPANY,KOREAFUEL-TECHCORPORATION reassignment HYUNDAIMOTORCOMPANY ASSIGNMENTOFASSIGNORSINTEREST(SEEDOCUMENTFORDETAILS). Assignors:CHOI,PIL-SEON,CHAE,MYUNG-KEUN,HAM,CHANG-HO,LIM,YOUNG-JAE,RYOO,DONG-MYOUNG 2016-01-07 PublicationofUS20160003122A1 publication Critical patent/US20160003122A1/en 2017-05-09 Applicationgranted granted Critical 2017-05-09 PublicationofUS9644518B2 publication Critical patent/US9644518B2/en Status Active legal-status Critical Current 2035-05-26 Adjustedexpiration legal-status Critical Links USPTO USPTOPatentCenter USPTOAssignment Espacenet GlobalDossier Discuss XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemicalcompound 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NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 746 239000004202 carbamide Substances 0.000 title claims abstract description 373 239000000945 filler Substances 0.000 title claims abstract description 138 230000002265 prevention Effects 0.000 title description 9 238000002347 injection Methods 0.000 claims abstract description 204 239000007924 injection Substances 0.000 claims abstract description 204 230000000903 blocking Effects 0.000 claims abstract description 4 238000003780 insertion Methods 0.000 claims abstract description 3 230000002093 peripheral Effects 0.000 claims description 18 230000003111 delayed Effects 0.000 claims description 7 230000003139 buffering Effects 0.000 claims description 6 239000012528 membrane Substances 0.000 description 9 239000000446 fuel Substances 0.000 description 7 229910002089 NOx Inorganicmaterials 0.000 description 6 238000009423 ventilation Methods 0.000 description 5 QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemicalcompound 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N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4 238000001514 detectionmethod Methods 0.000 description 4 238000010531 catalyticreductionreaction Methods 0.000 description 3 230000035484 reactiontime Effects 0.000 description 3 230000015572 biosyntheticprocess Effects 0.000 description 2 238000006243 chemicalreaction Methods 0.000 description 2 238000005260 corrosion Methods 0.000 description 2 238000005516 engineeringprocess Methods 0.000 description 2 238000005755 formationreaction Methods 0.000 description 2 230000005484 gravity Effects 0.000 description 2 230000001105 regulatory Effects 0.000 description 2 229940095054 Ammoniac Drugs 0.000 description 1 239000003054 catalyst Substances 0.000 description 1 238000011109 contamination Methods 0.000 description 1 238000002425 crystallisation Methods 0.000 description 1 230000005712 crystallization Effects 0.000 description 1 239000002828 fueltank Substances 0.000 description 1 239000002184 metal Substances 0.000 description 1 239000007769 metalmaterial Substances 0.000 description 1 239000000203 mixture Substances 0.000 description 1 230000004048 modification Effects 0.000 description 1 238000006011 modificationreaction Methods 0.000 description 1 238000006722 reductionreaction Methods 0.000 description 1 238000004904 shortening Methods 0.000 description 1 230000035943 smell Effects 0.000 description 1 Images Classifications F—MECHANICALENGINEERING;LIGHTING;HEATING;WEAPONS;BLASTING F01—MACHINESORENGINESINGENERAL;ENGINEPLANTSINGENERAL;STEAMENGINES F01N—GAS-FLOWSILENCERSOREXHAUSTAPPARATUSFORMACHINESORENGINESINGENERAL;GAS-FLOWSILENCERSOREXHAUSTAPPARATUSFORINTERNALCOMBUSTIONENGINES F01N3/00—Exhaustorsilencingapparatushavingmeansforpurifying,renderinginnocuous,orotherwisetreatingexhaust F01N3/08—Exhaustorsilencingapparatushavingmeansforpurifying,renderinginnocuous,orotherwisetreatingexhaustforrenderinginnocuous F01N3/10—Exhaustorsilencingapparatushavingmeansforpurifying,renderinginnocuous,orotherwisetreatingexhaustforrenderinginnocuousbythermalorcatalyticconversionofnoxiouscomponentsofexhaust F01N3/24—Exhaustorsilencingapparatushavingmeansforpurifying,renderinginnocuous,orotherwisetreatingexhaustforrenderinginnocuousbythermalorcatalyticconversionofnoxiouscomponentsofexhaustcharacterisedbyconstructionalaspectsofconvertingapparatus F01N3/28—Constructionofcatalyticreactors F01N3/2896—Liquidcatalystcarrier B—PERFORMINGOPERATIONS;TRANSPORTING B60—VEHICLESINGENERAL B60K—ARRANGEMENTORMOUNTINGOFPROPULSIONUNITSOROFTRANSMISSIONSINVEHICLES;ARRANGEMENTORMOUNTINGOFPLURALDIVERSEPRIME-MOVERSINVEHICLES;AUXILIARYDRIVESFORVEHICLES;INSTRUMENTATIONORDASHBOARDSFORVEHICLES;ARRANGEMENTSINCONNECTIONWITHCOOLING,AIRINTAKE,GASEXHAUSTORFUELSUPPLYOFPROPULSIONUNITSINVEHICLES B60K13/00—Arrangementinconnectionwithcombustionairintakeorgasexhaustofpropulsionunits B60K13/04—Arrangementinconnectionwithcombustionairintakeorgasexhaustofpropulsionunitsconcerningexhaust B—PERFORMINGOPERATIONS;TRANSPORTING B60—VEHICLESINGENERAL B60K—ARRANGEMENTORMOUNTINGOFPROPULSIONUNITSOROFTRANSMISSIONSINVEHICLES;ARRANGEMENTORMOUNTINGOFPLURALDIVERSEPRIME-MOVERSINVEHICLES;AUXILIARYDRIVESFORVEHICLES;INSTRUMENTATIONORDASHBOARDSFORVEHICLES;ARRANGEMENTSINCONNECTIONWITHCOOLING,AIRINTAKE,GASEXHAUSTORFUELSUPPLYOFPROPULSIONUNITSINVEHICLES B60K15/00—Arrangementinconnectionwithfuelsupplyofcombustionenginesorotherfuelconsumingenergyconverters,e.g.fuelcells;Mountingorconstructionoffueltanks B60K15/03—Fueltanks B—PERFORMINGOPERATIONS;TRANSPORTING B67—OPENING,CLOSINGORCLEANINGBOTTLES,JARSORSIMILARCONTAINERS;LIQUIDHANDLING B67D—DISPENSING,DELIVERINGORTRANSFERRINGLIQUIDS,NOTOTHERWISEPROVIDEDFOR B67D7/00—Apparatusordevicesfortransferringliquidsfrombulkstoragecontainersorreservoirsintovehiclesorintoportablecontainers,e.g.forretailsalepurposes B67D7/02—Apparatusordevicesfortransferringliquidsfrombulkstoragecontainersorreservoirsintovehiclesorintoportablecontainers,e.g.forretailsalepurposesfortransferringliquidsotherthanfuelorlubricants B67D7/0288—Containerconnectionmeans B67D7/0294—Combinedwithvalves B—PERFORMINGOPERATIONS;TRANSPORTING B67—OPENING,CLOSINGORCLEANINGBOTTLES,JARSORSIMILARCONTAINERS;LIQUIDHANDLING B67D—DISPENSING,DELIVERINGORTRANSFERRINGLIQUIDS,NOTOTHERWISEPROVIDEDFOR B67D7/00—Apparatusordevicesfortransferringliquidsfrombulkstoragecontainersorreservoirsintovehiclesorintoportablecontainers,e.g.forretailsalepurposes B67D7/06—Detailsoraccessories B67D7/36—Arrangementsofflow-orpressure-controlvalves B67D7/362—Arrangementsofflow-orpressure-controlvalvescombinedwithover-fillpreventingmeans B—PERFORMINGOPERATIONS;TRANSPORTING B67—OPENING,CLOSINGORCLEANINGBOTTLES,JARSORSIMILARCONTAINERS;LIQUIDHANDLING B67D—DISPENSING,DELIVERINGORTRANSFERRINGLIQUIDS,NOTOTHERWISEPROVIDEDFOR B67D7/00—Apparatusordevicesfortransferringliquidsfrombulkstoragecontainersorreservoirsintovehiclesorintoportablecontainers,e.g.forretailsalepurposes B67D7/06—Detailsoraccessories B67D7/42—Fillingnozzles F—MECHANICALENGINEERING;LIGHTING;HEATING;WEAPONS;BLASTING F01—MACHINESORENGINESINGENERAL;ENGINEPLANTSINGENERAL;STEAMENGINES F01N—GAS-FLOWSILENCERSOREXHAUSTAPPARATUSFORMACHINESORENGINESINGENERAL;GAS-FLOWSILENCERSOREXHAUSTAPPARATUSFORINTERNALCOMBUSTIONENGINES F01N3/00—Exhaustorsilencingapparatushavingmeansforpurifying,renderinginnocuous,orotherwisetreatingexhaust F01N3/08—Exhaustorsilencingapparatushavingmeansforpurifying,renderinginnocuous,orotherwisetreatingexhaustforrenderinginnocuous F01N3/10—Exhaustorsilencingapparatushavingmeansforpurifying,renderinginnocuous,orotherwisetreatingexhaustforrenderinginnocuousbythermalorcatalyticconversionofnoxiouscomponentsofexhaust F01N3/18—Exhaustorsilencingapparatushavingmeansforpurifying,renderinginnocuous,orotherwisetreatingexhaustforrenderinginnocuousbythermalorcatalyticconversionofnoxiouscomponentsofexhaustcharacterisedbymethodsofoperation;Control F01N3/20—Exhaustorsilencingapparatushavingmeansforpurifying,renderinginnocuous,orotherwisetreatingexhaustforrenderinginnocuousbythermalorcatalyticconversionofnoxiouscomponentsofexhaustcharacterisedbymethodsofoperation;Controlspeciallyadaptedforcatalyticconversion;Methodsofoperationorcontrolofcatalyticconverters F01N3/2066—Selectivecatalyticreduction[SCR] Abstract Aureafillerneckforpreventingaureaoverflowincludesafillerhousingformingaureapathinwhichureaflowstoaureatank.Aninjectiongunguideisprovidedinthefillerhousing.Anendofaninjectiongunisfixedbytheinjectiongunguidetolimitaninsertionpositionoftheinjectionguninsertedintoaninletofthefillerhousing.Aninjectiongunguidefloodingphenomenonisgenerated,inwhichureaflowingbackwardfromtheureatankrisestoblockanairflowinthefillerhousingbeinggeneratedintheinjectiongunguide.Afillerhousingpressureincreasingphenomenonisgenerated,inwhichapressureinthefillerhousingisincreasedduetoblockingoftheairflowbytheinjectiongunguidefloodingphenomenonbeinggeneratedintheinjectiongunguide. Description CROSS-REFERENCETORELATEDAPPLICATIONS ThisapplicationclaimsthebenefitofprioritytoKoreanPatentApplicationNo.10-2014-0084292,filedonJul.7,2014,whichisincorporatedhereinbyreferenceinitsentirety. TECHNICALFIELD Thepresentdisclosurerelatestoaureatank,andmoreparticularly,toaureatankhavingaureafillerneckcapableofpreventinganoverflowofureaduringapressureincreaseintheureatankevenwhenamembranevalveisappliedthereto,andaureaafter-treatmentsystemhavinganoutsideureafillerneck. BACKGROUND Aureaafter-treatmenttechnologyisamethodofreducingNOxusingareactionformulaof2NO+2CO(orHC)→N2+2CObywhichureaistransformedintoammonia(NH3),andthen,theammoniareactsselectivelywithNOxthroughaselectivecatalyticreduction(SCR)catalyst.Theureaafter-treatmenttechnologyincludesaureatankstoringammoniaastheureawhichisharmlesstohumans,aSCR,andaninjectorforinjectingtheureaintotheSCR. Inrecentyears,sincetheexhaustemissionstandards(forBin5)ofNorthAmericarestricttheamountofNOxemissioninexhaustgasandparticularlyrestrictvehiclesfrombeingdrivenduringexhaustionofureaintheureatank,itisnecessarytoperiodicallyreplenishtheurea. Typically,replenishmentofureaintheureatankisperformedbyopeningaureainjectionportlocatedinsidethetankusingatrunkroomorbyopeningaureainjectionportlocatedoutsidealongwithafuelinjectionportlocated.Inaddition,ureaisinjectedintotheureatankathighspeedusingaureainjectiongunorisinjectedusingaseparateureacontainer. However,whenamembranevalvehavingasmallventilationrateisappliedtotheureatank,themembranevalvehasalimittoendureapressureincreaseintheureatankcausedbyinjectionofurea.Structuralweaknessofthemembranevalvecausesanoverflowphenomenoninwhichureaflowingbackwardattheendofinjectionisspoutedfromtheureainjectionportviaalevelingpipe,resultingindissatisfactionofauseroninjectionorreplenishmentofurea. Whentheureainjectionportisparticularlyprovidedinthetrunkroom,theoverflowofureathroughtheureainjectionportcausescontaminationofthetrunkroom,metalcorrosion,andammoniacsmellinsidethevehicle. Inaddition,theureatankhasarelativelysmallcapacityof25˜30Lto15˜20Lonthegroundofareductioninweightandanimprovementinlayout.However,thesmallcapacityoftheureatankinturncausesureatobefrequentlyinjected.Forthisreason,itisveryimportanttopreventtheureaoverflowgeneratedthroughtheureainjectionport. Forthepreventionoftheureaoverflow,arollovervalve(ROV)maybeappliedtoafueltank,insteadofthemembranevalve.However,theapplicationoftheROVcausescorrosionofureaandcrystallizationofureaduringexposurethereoftotheatmosphere.Accordingly,itisdifficulttoapplytheROV. SUMMARY Anaspectofthepresentinventiveconceptprovidesaureafillerneckandaureatankforpreventionofaureaoverflowandaureaafter-treatmentsystemwithanoutsidefillerneck,capableofshorteningashut-offreactiontimeofaninjectiongunandpreventinganoverflowofureathroughtheureafillerneckattheendofureainjection,thuscausingapressureincreaseintheureatankbyformationofaureainjectionpathextended,suchthatariseofureaflowingbackwardisdelayed,andabufferspaceinwhichtheureaflowingbackwardremains.Inparticular,anaspectofthepresentinventiveconceptprovidesaureafillerneckandureatankforpreventionofaureaoverflowandaureaafter-treatmentsystemwithanoutsidefillerneck,capableofconvenientlyinjectingureaasininjectionoffuelthroughafuelinjectionportbyalayoutofanoutsideureafillerneckdrawnoutofavehicle. Otherobjectsandadvantagesofthepresentdisclosurecanbeunderstoodbythefollowingdescription,andbecomeapparentwithreferencetotheembodimentsofthepresentinventiveconcept.Also,itisobvioustothoseskilledinthearttowhichthepresentdisclosurepertainsthattheobjectsandadvantagesofthepresentdisclosurecanberealizedbythemeansasclaimedandcombinationsthereof. Inaccordancewithanembodimentofthepresentinventiveconcept,aureafillerneckforpreventionofaureaoverflowincludesafillerhousingformingaureapathinwhichureaflowstoaureatank.Aninjectiongunguideisprovidedinthefillerhousing,andanendofaninjectiongunisfixedbytheinjectiongunguidetolimitaninsertionpositionoftheinjectiongun.Aninjectiongunguidefloodingphenomenonisgeneratedinwhichureaflowingbackwardfromtheureatankrisestoblockanairflowinthefillerhousingbeinggeneratedintheinjectiongunguide.Afillerhousingpressureincreasingphenomenonisgeneratedinwhichapressureinthefillerhousingisincreasedduetoblockingoftheairflowbytheinjectiongunguidefloodingphenomenonbeinggeneratedintheinjectiongunguide.Theinjectiongunisshut-offbydetectingapressurebythefillerhousingpressureincreasingphenomenonintheinjectiongunguide.Anoverflowoftheureaflowingbackwardisdelayedbyabackflowbufferingphenomenoninwhichtheureaflowingbackwardisstoredinaninnerspaceofthefillerhousingintheinjectiongunguide. Theinjectiongunguidemayincludeaureabufferportionwhichcomesintoclosecontactwithaninnerperipheralportionofahousingbodyofthefillerhousingandisformedwithagenerationspaceofthebackflowbufferingphenomenon.Aureainjectionportisspacedapartfromaconnectionsectioninwhichadiameterofthehousingbodyisreducedtoadiameterofahousingextensionportionsuchthatthehousingextensionportionconnectedtothehousingbodyhasachangeinsection,andthusagenerationspaceofthefillerhousingpressureincreasingphenomenonbytheinjectiongunguidefloodingphenomenonisformedintheureainjectionportandtheendoftheinjectionguniscaughtbytheureainjectionport.Thehousingextensionportionmaybeconnectedwithaureainjectionpipeconnectedtotheureatank. Asideventinglinehavingahollowpipeshapemaybeconnectedtoaspaceformedbetweenanouterperipheralportionoftheureainjectionportandtheinnerperipheralportionofthehousingbody,andthesideventinglinemaybeconnectedwithalevelingpipeconnectedtotheureatank. Thehousingbodymayfurtherincludeasealblockwhichcomesintoclosecontactwithaninnerperipheralportionofthehousingbodytopassthroughtheinjectiongun,andthesealblockmaybedisposedabovetheinjectiongunguidetosealaninletofthehousingbody.Thesealblockmayincludeamagneticringandamagnetholderintowhichthemagneticringisfittedinthevicinityoftheinjectiongun,andanouterperipheralportionofthemagnetholdermaycomeintoclosecontactwiththeinnerperipheralportionofthehousingbody. Thehousingbodymayfurtherincludeaureainjectionportthroughwhichtheinjectiongunpassesabovethesealblock,andtheureainjectionportmaybefittedandcoupledtothehousingbody.Theureainjectionportmaybesubjectedtoattractiveforcebymagneticforceofamagneticringinsertedintoamagnetholderofthesealblock. Thehousingbodymayfurtherincludeamountingflangetowhichtheureainjectionportisfittedandcoupled,andthemountingflangemayhaveadrilledmountinghole. Theureatankmayincludeamembranevalveforregulationofaventilationrate.Alevelingpipemaintainsanairflowblockedbytheinjectiongunguidefloodingphenomenoninsuchamannerthattheinnerspaceofthefillerhousingcommunicateswithaninnerspaceoftheureatankbody.Aureainjectionpipeguidestheureadischargedfromthefillerhousingtotheinnerspaceoftheureatank.Acheckvalveisprovidedatanoutletportionoftheureainjectionpipe. Inaccordancewithanotherembodimentofthepresentinventiveconcept,aureaafter-treatmentsystemwithanoutsidefillerneckincludesaureafillerneckcoupledtoanoutsideinjectionportdoorexposuretotheoutsideofavehicle.Ureaisinjectedbyopeningtheoutsideinjectionportdoor.Aureatankincludesaureainjectionpipeconnectedtoanoutletoftheureafillernecktoguidetheureainjectedintoaureatankbodyforstoringtheurea.Alevelingpipeconnectstheureafillernecktotheureatankbodytoformanairflowbywhichaninnerspaceoftheureafillerneckcommunicateswiththeatmosphere.Aureainjectorinjectstheureaintoanexhaustpipe,andaselectivecatalyticreductionremovesNOxinexhaustgas. Theureafillerneckmayincludeafillerhousinghavinganinletintowhichaureainjectiongunisinsertedandanoutletthroughwhichtheureadischargedfromtheureainjectiongunisdischargedtotheureainjectionpipe.Aureainjectionportiscoupledtotheinletofthefillerhousing.Theinjectiongunisinsertedintotheureainjectionport,andasealblockisdisposedbeneaththeureainjectionportsoastosealtheinletofthefillerhousing.Theinjectiongunpassesthroughthesealblock,andaninjectiongunguideisprovidedinthefillerhousing.Theinjectiongunisshut-offduetoapressureincreaseinthefillerhousingbyureaflowingbackwardduringinjectionoftheurea.Anoverflowoftheureaflowingbackwarddischargedtotheinletofthefillerhousingisdelayedbystoringtheureaflowingbackwardinaninnerspaceofthefillerhousing.Asideventinglineisdrawnfromtheinjectiongunguidebywhichanendoftheinjectiongunisfixed.Aninnerspaceisformedbythefillerhousingandconnectedwiththelevelingpipe. Theureatankmayincludeacheckvalveprovidedatanoutletportionoftheureainjectionpipe,amembranevalveforregulationofaventilationrateattheureatankbody,aureadetectionsensorwhichdetectsanamountofthestoredurea,andaureapumpwhichpumpsandsuppliesthestoredureatotheureainjector. BRIEFDESCRIPTIONOFTHEDRAWINGS FIG.1isaviewillustratingaureatankwithaureafillerneckforpreventionofaureaoverflowaccordingtoanembodimentofthepresentinventiveconcept. FIG.2isaviewillustratingadetailedviewoftheureafillerneckappliedforpreventionoftheureaoverflowaccordingtotheembodimentofthepresentinventiveconcept. FIG.3isaviewillustratingastateinwhichureaisinjectedintotheureatankusingtheureafillerneckaccordingtotheembodimentofthepresentinventiveconcept. FIG.4isaviewillustratingastateinwhichtheureafillerneckcopeswithabackflowofureacausedbyanincreaseinpressureintheureatankattheendofureainjectionaccordingtotheembodimentofthepresentinventiveconcept. FIG.5isaviewillustratinganexampleofaureaafter-treatmentsysteminwhichaureafillerneckforpreventionofaureaoverflowisconfiguredasanoutsidetypefillerneckaccordingtoanembodimentofthepresentinventiveconcept. DETAILEDDESCRIPTION Exemplaryembodimentsofthepresentinventiveconceptwillbedescribedbelowinmoredetailwithreferencetotheaccompanyingdrawings.Thepresentinventiveconceptmay,however,beembodiedindifferentformsandshouldnotbeconstruedaslimitedtotheembodimentssetforthherein.Rather,theseembodimentsareprovidedsothatthisdisclosurewillbethoroughandcomplete,andwillfullyconveythescopeofthepresentdisclosuretothoseskilledintheart.Throughoutthedisclosure,likereferencenumeralsrefertolikepartsthroughoutthevariousfiguresandembodimentsofthepresentinventiveconcept. FIG.1showsaureatankaccordingtoanembodimentofthepresentinventiveconcept. AsshowninFIG.1,aureatank30includesamembranevalve35providedonaureatankbodyforregulatingaventilationrate.Alevelingpipe20injectsurea,suchthatapressureintheureatankbodycommunicateswiththeatmosphere.Aureainjectionpipe10guidestheureainjectedfromtheoutsidetotheureatankbody.Aureafillerneck1isconnectedtothelevelingpipe20andtheureainjectionpipe10inordertoreleaseapressureincreaseintheureatankbodyandtoformtheatmosphericpressureintheureatankbodywhentheureaisinjectedthereto. Theureatankbodydeterminesaureainjectioncapacityoftheureatank30.Theureatankbodyfurtherincludesaninjectionconnector31-1forconnectingtheureainjectionpipe10.Aventingconnector31-2connectsofthelevelingpipe20.Acheckvalve33closesanoutletoftheinjectionconnector31-1,suchthattheureaintheureatankbodyisnotejectedthroughtheinjectionconnector31-1.Theureatankbodymayfurtherincludeaureadetectionsensor(notshownfortheremainingurea. Theureainjectionpipe10hasahollowshapetherein,whichconnectstheinjectionconnector31-1totheureafillerneck1.Theureainjectionpipe10hasastraightsectionformedtosomeextentfromaconnectionportionoftheureafillerneck1,suchthataflowoftheureainjectedthroughtheureafillerneck1isaffectedbygravity. Thelevelingpipe20hasahollowshapetherein,whichconnectstheventingconnector31-2totheureafillerneck1. Theureafillerneck1isconnectedtotheureainjectionpipe10atanendofthestraightsectionintowhichaureainjectiongun(referto‘100-1’inFIG.3)isinsertedinastraightline.Theureafillerneck1isconnectedtothelevelingpipe20atasideofthestraightsection.Therefore,aninletoftheureainjectionpipe10formsarightanglewithaninletofthelevelingpipe20. Tothisend,theureafillerneck1includesahollow-cylindricalfillerhousing3havingaureadischargeportreducedinsection.Ahollowureainjectionport5guidestheinsertedureainjectionguninastraightline.Ahollowsealblock7sealsaconnectionportionbetweenthefillerhousing3andtheureainjectionport5.Aninjectiongunguide8guidesanendoftheureainjectionguninsertedintothefillerhousing3.Asideventingline9isprovidedatasideofthefillerhousing3tobeperpendiculartotheureadischargeportofthefillerhousing3. FIG.2showsdetailedviewsofthefillerhousing3,theureainjectionport5,thesealblock7,theinjectiongunguide8,andthesideventingline9. AsshowninFIG.2,thefillerhousing3includesahollow-cylindricalhousingbody3-1,ahollow-cylindricalhousingextensionportion3-2extendingfromthehousingbody3-1tohaveareducedcross-sectionalareacomparedtoacross-sectionalareaofthehousingbody3-1,andadiamond-shapedmountingflange3-3whichhasboltingholesdrilledatoppositesidesthereofandisformedatthehousingbody3-1oppositethehousingextensionportion3-2.Particularly,aninclinedcross-sectionalareaDdisformedatacertainsectionatwhichthehousingbody3-1havingabodycross-sectionalareaDisgentlyconnectedtothehousingextensionportion3-2havingareducedcross-sectionalaread.Therefore,themountingflange3-3formsaninletofthefillerhousing3intowhichtheureainjectiongunisinserted,whereasthehousingextensionportion322formsanoutletofthefillerhousing3throughwhichtheureainjectedbytheureainjectiongunisdischarged.Theureainjectionpipe10oftheureatank30isconnectedtothehousingextensionportion3-2. Theureainjectionport5hasahollowthreadedbody5-1havingathreadformedonanouterperipheralsurfacethereofandafixedflange5-2formingaconcentriccirclewiththethreadedbody5-1tobecoupledtothemountingflange3-3ofthefillerhousing3.Particularly,thefixedflange5-2istightlyfittedtothemountingflange3-3usingagrooveformedatthemountingflange3-3ofthefillerhousing3,therebyformingafixationforce.However,ifnecessary,thefixedflange5-2maybescrewedorboltedtothemountingflange3-3.Accordingly,theureainjectionport5isassembledtothefillerhousing3ataninletportionthereoftobeintegralwiththefillerhousing3. Thesealblock7includesanannularmagneticring7-1asapermanentmagnetandahollow-cylindricalmagnetholder7-2.Themagneticring7-1isfittedintothemagnetholder7-2andisintegraltherewith.Themagnetholder7-2hasacirculargrooveintowhichthemagneticring7-1isinsertedandfitted.Anouterperipheralportionofthemagnetholder7-2istightlyfittedtoaninnerperipheralportionofthehousingbody3-1ofthefillerhousing3,andthus,theinletportionofthefillerhousing3issealedtogetherwithformationofafixationforce.However,ifnecessary,themagnetholder7-2maybescrewedintothehousingbody3-1.Particularly,themagneticring7-1pullstheureainjectionport5bymeansofmagneticforce,andthus,thefixationforceoftheureainjectionport5maybefurtherenhanced.Here,theureainjectionport5ismadeofametalmaterialsoastobepulledbythemagneticforce.Therefore,thesealblock7isassembledbeneaththeureainjectionport5coupledtotheinletportionofthefillerhousing3soastobeintegralinaninnerspaceofthefillerhousing3. Theinjectiongunguide8includesahollowureainjectionport8Aandahollowureabufferportion8Bconnectedtotheureainjectionport8A. Theinjectiongunguide8hasacross-sectionaldifferencebetweentheureainjectionport8Aandtheureabufferportion8B.Forthisreason,theureabufferportion8Bhasalargerdiameterthanthatoftheureainjectionport8A.Forexample,theureabufferportion8Bhasanouterdiametersized,suchthatanouterperipheralportionoftheureabufferportion8Bistightlyfittedtoaninnerperipheralportionofthehousingbody3-1ofthefillerhousing3,andthuscreatingafixationforce.Theureainjectionport8Ahasalargerdiameterthananinnerdiameterofthehousingextensionportion3-2soasnottobeinsertedintoaninnerperipheralportionofthehousingextensionportion3-2ofthefillerhousing3.Inaddition,theinjectiongunguide8hasalengthformedsoasnottointerferewiththesideventingline9servingasapassageforanincreaseinpressureintheureatank30andsuchthatapressuredischargedfromthesideventingline9mayacttowardthehousingextensionportion3-2ofthefillerhousing3.Tothisend,theureabufferportion8Bhasalengthformedsoasnottocoverthesideventingline9inastateassembledtothehousingbody3-1ofthefillerhousing3,andtheureainjectionport8Ahasalengthformedsoastobespacedapartfromthehousingextensionportion3-2attheconnectionsectionbetweenthehousingbody3-1andthehousingextensionportion3-2. Therefore,theinjectiongunguide8isassembledbeneaththesealblock7tobeintegralintheinnerspaceofthefillerhousing3. Thesideventingline9isdrawntoasideofthehousingbody3-1fromaspaceformedbythehousingbody3-1ofthefillerhousing3andtheureainjectionport8Aoftheinjectiongunguide8,andhasahollowpipeshape.Therefore,thesideventingline9hasanoutletthroughwhichtheincreasedpressureintheureatank30isdischargedtothehousingbody3-1ofthefillerhousing3.Thelevelingpipe20oftheureatank30isconnectedtothesideventingline9. FIG.3showsastateinwhichureaisinjectedintotheureatank30usingtheureafillerneck1. AsshowninFIG.3,theureafillerneck1enablesureatobeinjectedusingaureaautomaticinjector100oraureacontainer200.Forexample,theinjectionoftheureausingtheureaautomaticinjector100mayberealizedbyasimpleoperationinwhichaninjectiongun100-1oftheureaautomaticinjector100isinsertedintotheureainjectionport5,pushedtotheureainjectionport8Aoftheinjectiongunguide8,andthenoperated.Alternatively,theinjectionoftheureausingtheureacontainer200mayberealizedbyasimpleoperationinwhichacontainerinjectionport200-1oftheureacontainer200islocatedattheureainjectionport5andtheureacontainer200isslightlylifted. Forconvenienceofdescription,theureainjectedusingtheureaautomaticinjector100willbedescribedbelow. Theureadischargedfromtheureaautomaticinjector100bytheoperationoftheinjectiongun100-1isintroducedintothehousingextensionportion3-2ofthefillerhousing3viatheureainjectionport8Aoftheinjectiongunguide8comingintocontactwithanendoftheinjectiongunguide8.Inthiscase,anoutercircumferenceoftheinjectiongunguide8formsafixedstatewiththeureainjectionport8Aoftheinjectiongunguide8.Accordingly,theinjectedureaisdischargedtotheureainjectionpipe10connectedtothefillerhousing3throughthehousingextensionportion3-2bygravity.Theureadischargedtotheureainjectionpipe10byopeningthecheckvalve33duetotheureapressureisintroducedintotheureatank30.Asaresult,theinjectionoftheureausingtheureafillerneck1isaccomplished.Inthiscase,thesideventingline9formsanairflowwithinthefillerhousing3sothattheureaissmoothlydischargedusingtheinjectiongun100-1. FIG.4showsanoperationstateoftheureafillerneck1whentheureaflowsbackwardduetoapressureincreaseintheureatank30attheendofureainjectionusingtheinjectiongunguide8. AsshowninFIG.4,anincreaseamountofureaintheureatank30increasesapressureintheureatank30attheendofureainjection,andthepressureincreaseintheureatank30causestheinjectedureatoflowbackwardtothehousingextensionportion3-2ofthefillerhousing3.Thebackflowoftheureageneratedduringtheureainjectionistypicallyexhibitedasanoverflowbywhichtheureaisdischargedtooutside,buttheureafillerneck1preventstheoverflowduetothebackflowoftheurea. Specifically,whenureaflowingbackwardUrisestothehousingextensionportion3-2ofthefillerhousing3andthebackflowoftheureaproceeds,aninjectiongunguidefloodingphenomenonAisgeneratedinwhichanendoftheureainjectionport8Aoftheinjectiongunguide9isblockedbytheureaflowingbackward.Theairflowformedbythesideventingline9andtheinjectiongun100-1areblockedbytheinjectiongunguidefloodingphenomenonA. TheblockingoftheairflowbytheinjectiongunguidefloodingphenomenonAbringsaboutafillerhousingpressureincreasingphenomenonBinwhichthepressureinthefillerhousing3isincreased.ThepressureincreasingphenomenonBisexhibitedaspressuredetectionbyasensor(omittedbecauseofatypicalconfiguration)oftheinjectiongun100-1,andshut-offoftheinjectiongun100-1proceedsaccordingtoavariationinpressurebythedetectedpressure.Therefore,theureafillerneck1changesthebackflowoftheureaintotheshut-offoftheinjectiongun100-1soastopreventcontinuousinjectionoftheureabytheinjectiongun100-1whichcausestheureaoverflow. Furthermore,whenthebackflowoftheureatemporarilyproceedsafterremovaloftheinjectiongun100-1andthustheureaflowingbackwardUfurtherrisestothehousingextensionportion3-2ofthefillerhousing3,abackflowbufferingphenomenonCisgeneratedinwhichthebufferspaceportion8Boftheinjectiongunguide8isfilledwiththeureaflowingbackwardU.Atimeforfillingtheinsideofthefillerhousing3withtheureaflowingbackwardUisdelayedbythebackflowbufferingphenomenonC,suchthattheoverflowoftheureaflowingbackwardUisnotimmediatelygeneratedthroughtheureafillerneck1afterremovaloftheinjectiongun100-1bytheshut-off. FIG.5showsanexampleofaureaafter-treatmentsysteminwhichtheureafillerneckforpreventionofaureaoverflowaccordingtothepresentdisclosureisanoutsideureafillerneck. AsshowninFIG.5,theureaafter-treatmentsystemincludesaureatank30whichstoresurea,aureainjector40whichinjectstheureaintoanexhaustpipe60,aselectivecatalyticreduction(SCR)50whichremovesNOxinexhaustgas,andaureafillerneck1whichiscoupledinsideanoutsideinjectionportdoor70toinjecttheureaintotheureatank30. Theureafillerneck1includesafillerhousing3connectedwithaureainjectionpipe10connectedtotheureatank30,aureainjectionport5intowhichaninjectiongunforinjectionoftheureaisinserted,asealblock7,aninjectiongunguide8,andasideventingline9connectedwithalevelingpipe20connectedtotheureatank30.Suchcomponentshavethesamestructuresandoperationsasthoseoftheureafillerneck1describedinFIGS.1to4. Theureatank30includesamembranevalve35forregulatingaventilationrate.Theureainjectionpipe10isconnectedtothefillerhousing3oftheureafillerneck1,andthelevelingpipe20isconnectedtothesideventingline9oftheureafillerneck1.Aureadetectionsensor37detectstheureaoftheureatank30,andaureapump(notshown)pumpsandsuppliesthestoredureatotheureainjector40. Theureainjector40injectstheureapumpedbytheureapumpatafrontpositionoftheSCR50intotheexhaustpipe60.TheSCR50isinstalledtotheexhaustpipe60andremovesNOxinexhaustgasby2NO+2CO(orHC)→N2+2CO(reactionformula)usingtheureainjectedintotheexhaustpipe60. Therefore,intheureaafter-treatmentsystem,theureamaybeinjectedbyasimpleandconvenientoperationinwhich,whentheureaisinjectedintotheureatank30,theoutsideinjectionportdoor70providedoutsidethevehicleisopenedsothataninjectiongun100-1ofaureaautomaticinjector100isinsertedintotheureainjectionport5locatedinsidetheinjectionportdoor70oracontainerinjectionport200-1ofaureacontainer200islocatedattheureainjectionport5locatedinsidetheinjectionportdoor70. Asdescribedabove,theureaafter-treatmentsystemwithanoutsidefillerneckaccordingtothepresentdisclosureincludestheureafillerneck1providedinthefillerhousing3throughwhichtheureaisdischargedtotheureatankbodyformingastoragespaceoftheurea.Theinjectiongun100-1isinsertedintotheinletofthefillerhousingbeingshut-offduetothepressureincreaseinthefillerhousingbytheureaflowingbackwardUduringtheinjectionoftheurea.TheoverflowoftheureaflowingbackwardUisdischargedtotheinletofthefillerhousing3beingdelayedbystoringtheureaflowingbackwardUintheinnerspaceofthefillerhousing3.Theureatank30isconnectedtotheureafillerneck1bytheureainjectionpipe10andthelevelingpipe20.Consequently,itmaybepossibletoshortenashut-offreactiontimeoftheinjectiongunandpreventtheoverflowoftheureaattheendofureainjection,andparticularlytoconvenientlyinjecttheureaasininjectionoffuelthroughafuelinjectionportbythelayoutoftheoutsidetypeureafillerneckdrawnoutofthevehicle. Inaccordancewiththeexemplaryembodimentsofthepresentinventiveconcept,itispossibletopreventanoverflowofureathroughaureafillerneckeventhoughtheureaflowsbackwardduetoapressureincreaseinaureatankattheendofureainjection,byformingabufferspaceinwhichtheureaflowingbackwardtoaninnerspaceoftheureafillerneckiscollected. Inaddition,itispossibletoshortenashut-offreactiontimeofaninjectiongunattheendofureainjectioncausingthepressureincreaseintheureatankbyformingaureainjectionpathsuchthatariseoftheureaflowingbackwardtotheureafillerneckisdelayed. Furthermore,itispossibletoconvenientlyinjecttheureaasininjectionoffuelthroughafuelinjectionportbyanoutsideureafillerneckdrawnoutofthevehicle. Whilethepresentinventiveconcepthasbeendescribedwithrespecttothespecificembodiments,itwillbeapparenttothoseskilledintheartthatvariouschangesandmodificationsmaybemadewithoutdepartingfromthespiritandscopeoftheinventionasdefinedinthefollowingclaims. Claims(8) Whatisclaimedis: 1.Aureafillerneckforpreventingaureaoverflow,comprising: afillerhousingformingaureapathinwhichinjectedureaflowstoaureatank;and aninjectiongunguideprovidedinthefillerhousing,anendofaninjectiongunfixedbytheinjectiongunguidetolimitaninsertionpositionoftheinjectionguninsertedintoaninletofthefillerhousing, whereinaninjectiongunguidefloodingphenomenonisgenerated,inwhichureaflowingbackwardfromtheureatankrisestoblockanairflowinthefillerhousingbeinggeneratedintheinjectiongunguide, afillerhousingpressureincreasingphenomenonisgenerated,inwhichapressureinthefillerhousingisincreasedduetoblockingoftheairflowbytheinjectiongunguidefloodingphenomenonbeinggeneratedintheinjectiongunguide, theinjectiongunisshut-offbydetectingthepressureinthefillerhousingpressureincreasingphenomenonintheinjectiongunguide,and theareaoverflowflowingbackwardisdelayedbyabackflowbufferingphenomenoninwhichtheureaflowingbackwardisstoredinaninnerspaceofthefillerhousingintheinjectiongunguide, whereintheinjectiongunguidecomprises: aureabufferportionwhichcomesintocontactwithaninnerperipheralportionofahousingbodyofthefillerhousingandisformedwithagenerationspaceofthebackflowbufferingphenomenon;and aureainjectionportspacedapartfromaconnectionsectioninwhichadiameterofthehousingbodyissmallerthanadiameterofahousingextensionportionsuchthatthehousingextensionportionconnectedtothehousingbodyhasachangingsection,sothatagenerationspaceofthefillerhousingpressureincreasingphenomenonbytheinjectiongunguidefloodingphenomenonisformedintheureainjectionportandtheendoftheinjectiongunisfixedbytheureainjectionport,and whereintheinjectiongunguideisassembledtobepress-fittedintotheinnerspaceofthefillerhousing. 2.Theureafillerneckofclaim1,whereinthehousingextensionportionisconnectedwithaureainjectionpipeconnectedtotheureatank. 3.Theureafillerneckofclaim1,whereinasideventinglinehavingahollowpipeshapeisconnectedtoaspaceformedbetweenanouterperipheralportionoftheureainjectionportandtheinnerperipheralportionofthehousingbody,andthesideventinglineisconnectedwithalevelingpipeconnectedtotheureatank. 4.Theureafillerneckofclaim1,whereinthehousingbodyfurthercomprisesasealblockwhichcontactstheinnerperipheralportionofthehousingbodytopassthroughtheinjectiongun,andthesealblockisdisposedabovetheinjectiongunguidetosealaninletofthehousingbody. 5.Theureafillerneckofclaim4,whereinthesealblockcomprisesamagneticringandamagnetholderintowhichthemagneticringisfittedinthevicinityoftheinjectiongun,andanouterperipheralportionofthemagnetholdercomesintoclosecontactwiththeinnerperipheralportionofthehousingbody. 6.Theureafillerneckofclaim4,whereintheinjectiongunpassesabovethesealblockthroughtheureainjectionportwhichisfittedandcoupledtothehousingbody. 7.Theureafillerneckofclaim6,whereintheureainjectionportispulledbyamagneticforceofamagneticringinsertedintoamagnetholderofthesealblock. 8.Theureafillerneckofclaim6,whereinthehousingbodyfurthercomprisesamountingflangetowhichtheureainjectionportisfittedandcoupled,andthemountingflangehasadrilledmountinghole. 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