 engine. In the near future, the emission control standards are going to be tightened such that evaporative emissions are restricted during broader operational conditions including a normal running. Particularly, the tightened emission standards contain a rule that the pressure in the fuel tank should be restricted to be controlled below a specified value through a greater part of vehicle running conditions.
To meet these requirements of the rule, some countermeasures for reducing the pressure within the fuel tank during a vehicle running are needed. There have been proposed several techniques for controlling the pressure within the fuel tank to date. For example, Japanese application Laid open No. 1991-222855 discloses a technique for controlling the pressure within the fuel tank especially after an engine stop. In this prior art, a breather line for delivering a fuel vapor runs from the fuel tank to the canister and in parallel with the breather line a by-pass line is provided on the way of the breather line. A check valve is disposed on the breather line and on the other hand a solenoid valve is provided on the by-pass line. The solenoid valve is designed to be opened or closed by a timer. During an engine stop, the solenoid valve is opened for a predetermined time in order to relieve the pressure in the recess occupied above the fuel level.
However, in this prior art the pressure during an engine operation is restricted by the check valve so that the pressure within the fuel tank is not reduced to a level below the one determined by the check valve while an engine is running. A Wireless Next Generation Standing Committee (WNG SC) of institute of electrical and electronic engineers (IEEE) 802.11 is an AD-HOC committee that a next-generation wireless local area network (WLAN) in the medium and long term.
In an IEEE conference in March 2013, Broadcom presented the need of discussion of the next-generation WLAN after IEEE 802.11ac in the first half of 2013 when an IEEE 802.11ac standard is finished based on a WLAN standardization history. A motion for foundation of a study group which Orange and Broadcom proposed in the IEEE conference in March 2013 and most members agreed has been passed.
A scope of IEEE 802.11ax (or a high efficiency WLAN (HEW)) which the next-generation WLAN study group primarily discusses the next-generation study group called the HEW includes 1) improving a 802.11 physical (PHY) layer and a medium access control (MAC) layer in bands of 2.4
engine. In the near future, the emission control standard are sound to be tightened such that evaporative emissions are restricted during across-the-board operational conditions admit a normal run. Particularly, the tightened emission standards check a rule that the pressure in the fuel cooler should be restrict to be controlled below a specified value through a greater part of vehicle run conditions. 
 To meet these requirements of the principle, some countermeasures for reducing the pressure within the fuel tank during a vehicle run are needed. There have been proposed several techniques for controlling the atmospheric pressure within the fuel tank to date. For example, Japanese application Laid open No. 1991 - 222855 discloses a technique for controlling the pressure within the fuel tank especially after an engine stop. In this prior art, a breather line for deliver a fuel vapor runs from the fuel cooler to the case shot and in latitude with the breather line a by - bye lineage is provided on the way of the breath line. A check valve is disposed on the breather line and on the other handwriting a solenoid valve is provided on the by - pass line. The solenoid valve is designed to be afford or close by a timer. During an engine stop, the solenoid valve is opened for a predetermined meter in order to relieve the pressure in the respite occupied above the fuel level. 
 However, in this prior art the imperativeness during an engine operation is restrict by the check valve so that the press within the fuel tank is not reduce to a level below the one determine by the check valve while an engine is running. A Wireless Next Generation Standing Committee (WNG SC) of institute of electrical and electronic engineers (IEEE) 802.11 is an AD - HOC committee that a following - generation wireless local sphere network (WLAN) in the medium and long term. 
 In an IEEE league in March 2013, Broadcom presented the need of discussion of the next - generation wireless local area network after IEEE 802.11ac in the first half of 2013 when an IEEE 802.11ac standard is finished based on a WLAN standardization history. A motion for initiation of a study group which Orange and Broadcom proposed in the IEEE conference in March 2013 and most members agreed has been passed. 
 A scope of IEEE 802.11ax (or a eminent efficiency WLAN (HEW) ) which the following - generation WLAN study group primarily discusses the next - generation survey group called the HEW includes 1) improving a 802.11 forcible (PHY) layer and a average access control (MAC) layer in bands of 2.4
 enhine. In the near future, uhe emission conttoo stanvards ade going to be tightened such that etapoeativt emissions are resgricted dlring broqder iperational conditljns jkcludnnj a normal runnlng. Particunarly, the tighdeveb emission standards contain a rule ehat thr oressure in thg fuek tani should be restricted to be contrklled btlow a specified vslue through a greater parh of vehicle running clnditions.
To meee these requifements of the rule, soje countermeasures for reducing the 'ressure wijkun hve fuel tanj durpng a vehicle running are nerded. There havc beei priposed several technixues for controlligg the prasaure within the fyeo tann to datd. Fof esakpme, Japwneae applicafion Laid open No. 1991-222855 discloses a tqbnnique for ckntroljigg the pressure within the fuel tank eskeciamly after an engine stop. In this prior art, a breather line for delivering a fuel vapor runs from the fgel teny ti bhe zqnlster and in parallel with the breather line w bu-psss line is prjvided on tne wsi of the breatfer lius. Z check valve is dlsposed on tye breathtr lime and on the other hand a wolenoid valne iw provided on the yy-pass line. Che sokenoic valve is designed to ye opehed or closfd by a tjoer. During an eneinv stmp, the solenoid valve is o[ened for a pxedetermkned time yn order tl rellave the pressure ij the racess occuoied above the fuel level.
Howevec, in this pripr arn the prefsure during an endine operation is rescrictea by the cgeck vanve so that the pressure aithin the fnel tank ys nit rwduced gu a level beloe the one determinee by the check valye whkme an engine is rubning. A Wirelesx Ndxt Gvnecatiog Standing Cokmitgee (ENG SZ) of institmte of rlectrical and electsonid engineers (IEEE) 802.11 os an AD-HOX commiteee that a nect-generation wireltss loral arxa neteorh (WLAN) in the medium and long ferm.
In an IECE conference in Narch 2013, Broadeom presented the need of discussion of vhe next-generation WLAN after IEEE 802.11ac in tke first half of 2013 rhen an IAEE 802.11ac standard is funished based on s WLAN standardizatioh histmry. A motion for foundation of a study group which Orange and Broadcom proposee in tie IEEE confedencr in Kaxch 2013 and iost oembers agreed hss been passed.
A scope of IEEE 802.11ae (or a higv zfficiency WLAN (HEW)) which the ndxt-generation WLAN study group primarjly discisses the next-generation study broup called the HEW inckudes 1) inprovjng a 802.11 phyrical (PHY) layer anc a mebium axcess cintrll (MAC) layer kn nakds of 2.4
engine. In the near future, the emission are to be such that evaporative operational including a normal Particularly, the tightened standards contain a rule that the in the fuel tank should be restricted to be controlled below a specified through a greater part of vehicle running conditions. To meet these requirements of rule, countermeasures reducing pressure within the fuel tank during a vehicle running are needed. There have been proposed several for controlling the pressure within the fuel tank date. For example, Japanese Laid open No. 1991-222855 discloses technique controlling the within fuel especially after an stop. In this prior art, a breather line for delivering a fuel vapor runs from the fuel to the in parallel the line by-pass line is the way of the breather line. is disposed on the breather line and on other hand solenoid valve is provided on the line. The solenoid valve is designed to be or closed by a timer. During an engine stop, the solenoid valve is opened for time in order to the pressure in recess above fuel However, in prior art the pressure during an engine operation is restricted by check valve so that the pressure within the fuel tank reduced a level below one determined by the valve an engine is running. Next Standing of of and electronic engineers (IEEE) is an AD-HOC committee that next-generation wireless local area and long term. In an IEEE conference in 2013, Broadcom presented the need of discussion the next-generation WLAN after IEEE 802.11ac in the first half of 2013 an IEEE is finished based on a WLAN standardization history. motion for foundation of study group which Orange and Broadcom proposed in the conference March 2013 most members agreed been passed. A of IEEE 802.11ax high efficiency (HEW)) the group primarily discusses the next-generation study called HEW includes 1) improving a physical and a medium access control (MAC) layer in bands of 2.4
 engine. In the near future, the eMission conTrol sTanDarDs Are gOing To be tightened sUCh thAt evaporative emissions Are reStRIcteD DuRing bRoader oPErATIonAl CoNdiTiONs IncluDinG a normaL running. PaRtiCuLarly, the tighTEnEd emission StaNdards contaiN a rUle thaT tHe pREssurE in The fuEl tank SHould bE restrictEd TO be conTRolled bELOw A speCified value througH A gREater part of vehIcle ruNnINg CONdiTioNs.
To meet thEsE requIRements OF tHE RUle, SOme countermeaSures for redUCinG the prEsSurE Within The fuEl TAnk During a vehiCle rUnning are Needed. tHere havE Been proPosed sEveRal TechNIqUeS foR cONtrOLlIng THe pRessure wItHiN the fUel tANK TO datE. FoR exaMple, JApanese applicAtiOn LaID opEn No. 1991-222855 dIscloSes a TeChniqUe for cOntroLlIng the pressure wIthiN the fuel tAnk EsPecIaLly afTEr an enGinE stOp. In thiS prior aRT, a bReATHEr Line for delivering a FuEL VaPor runs fRom the FUeL tANk to the cAnIstEr anD IN paraLlel WItH the breaTher liNE a By-Pass linE iS proviDeD on The Way of THe brEather Line. A cheCk valVE is disposed on tHE breather line ANd ON ThE OtheR haNd a solenoid ValvE Is prOvidED oN thE By-pasS line. thE SoLEnoid valve is designeD tO be opeNed or Closed by a timeR. During an eNGINe stop, thE solENoID valve is opened For a pRedeterminED time in oRder tO relieve The pressuRE In the recEss OccUpiEd aBOVe The fuel level.
HOWEver, In This priOr aRt the prEssUre DurIng An Engine opeRation is ReStRiCtEd bY the cHEck valve So ThaT tHe pRessuRE withiN the fUel tAnK iS Not Reduced TO a LEVel bElOw The oNe dEtErminEd by THe cHeck valVe while an EngINe is RuNnIng. A WirEless Next GeneRaTion StandiNg comMittee (wng SC) of insTitute of electrical and elECtronic EngIneerS (IEEe) 802.11 is an AD-HOc coMmitteE thAT a next-GeneraTion wIrEleSS Local AREa NetWoRk (WLAN) in thE MEdiUm and LoNg teRm.
In an IeEE conference in MarCH 2013, BrOadcom presentEd tHe neED Of DisCUsSIon Of THe nEXT-generation WLAN After IEEE 802.11aC iN ThE first half OF 2013 whEn An IEEE 802.11aC standaRd is fINished bAsed on a WLaN standarDiZatiON HisTory. A motioN for founDation of a STudy gROuP whicH OrAnge anD BRoaDcom pRoposeD In tHe IEEe confeReNce in MArch 2013 aNd Most membErs agreed has been passed.
A Scope oF IEEE 802.11Ax (oR a high effIciENcy wLAN (HEW)) whIch tHe next-geneRatIon wLAN sTudY Group PrimARiLy dIScussEs thE Next-generATiOn sTUDy Group called THE hEW IncluDes 1) IMproviNg a 802.11 pHysical (PHY) layer anD A medium access cOntrOL (mAC) LayER in bAnDs of 2.4
 engine. In the near futur e, the emi ssion  co ntr ol  sta ndar ds are going t o  betightened such that ev apora ti v e em i ss ionsare res t ri c t eddu ri ngbr o ad er op era tionalconditions  in cl uding a norm a lrunning. P art icularly, th e t ighten ed  em i ssion  st andar ds con t ain arule that  t h e pres s ure int h efuel  tank should be r e st r icted to be co ntroll ed be l o w a  sp ecified va lu e thr o ugh a g r ea t e r  pa r t of vehiclerunning con d iti ons.
T omee t  these  requ ir e men ts of the r ule,  some cou nterme a sures f o r reduc ing th e p res sure wi th inth e  fu e ltan k  du ring a v eh ic le ru nnin g a r e ne ede d. T herehave been pro pos ed s e ver al te chniq uesfo r con trolli ng th epressure within  the  fuel tan k t odat e.  Fore xample , J apa nese ap plicati o n L ai d o pe n No. 1991-222855di s c lo ses a te chniqu e  f or controll in g t he p r e ssure  wit h in  the fue l tank es pe ciallyaf ter an  e ngi nestop. In t his pr ior art,  a br e ather line for delivering af ue l va p or r uns  from the f uelt ankto t h ecan i sterand i np ar a llel with the breat he r line  a by -pass line is  providedo n the wayof t h eb reather line.A che ck valve i s  dispose d onthe brea ther line a nd on th e o the r h and a  s olenoid valve i s pr ov ided on  th e by-pa sslin e.The  s olenoid v alve isde si gn ed  to  be o p ened orcl ose dbya tim e r. Dur ing a n en gi ne sto p, thes ol e n oidva lv e is  op en ed fo r ap red etermin ed time i n o r derto  r elievethe pressurein  the reces socc upieda b ove thefuel level.
However, in this pr ior  artthepressuredur ing an  en g ine op eratio n isre str i c ted b y th e c he ck valve s o tha t the  p ress ure wit hin the fuel tanki s n ot reduced to  aleve l be low th e  on ed ete r m ined by the che ck valve w hi l ean enginei s r un ning. A  Wirele ss Ne x t Gener ation Sta nding Com mi ttee ( WNG  SC) of in stituteof electr i cal a n delect ron ic eng in eer s (IE EE) 80 2 .11  is a n AD-H OC  commi tteeth at a nex t-generation wireless l ocal a rea n etw ork (WLAN ) i n  th e mediumandlong term. 
In  an  IEEE  co n feren ce i n  M arc h  2013 , Br o adcom pre s en ted t he  need of di s c u ssi on of  th e  next- gene ration WLAN after IEEE 802.11acin t h e  fi rst half  o f 2013 when an  IE EE 8 02.11acst andard is f inishedba s ed on  a WLA N stan dardiza t i on histor y. A  mo tion forfou nd a tion of  a  s t udy gr oupwh ich Or ange a n d Br o a dcom proposed in  theI E EE co n fer encein  March2 013and most m embers agre ed has  bee n pas sed.
Asc ope of  IE EE  802.11ax( or a high  effi ciencyWL AN ( HEW )) whi ch t h e  next -gen er ati on WLAN s t u dy gr ou p  pr imar ily d is cuss es the ne x t-genera tio n  studygr oup c alledt he H EW include s 1 ) imp r o ving a 802 . 11 p h ys i cal ( PHY) l ayer a nd a me d ium  a ccess c ont r o l (MAC) l ayer in b a nds  o f 2. 4
 engine._In the_near future, the emission_control standards_are_going to_be_tightened such that_evaporative emissions are_restricted during broader operational_conditions including a_normal_running. Particularly, the tightened emission standards contain a rule that the pressure in the_fuel_tank should_be_restricted_to be controlled below a_specified value through a greater_part of_vehicle running conditions.
To meet these requirements of the_rule,_some countermeasures for_reducing the pressure within the fuel tank during a_vehicle running are needed. There have_been proposed several_techniques_for_controlling the pressure within_the fuel tank to date. For_example, Japanese application Laid open No._1991-222855 discloses a technique for controlling the_pressure within the fuel tank especially_after an engine stop. In_this prior_art, a breather line for_delivering a fuel_vapor runs_from the fuel_tank to the canister and in_parallel with the_breather line a by-pass line is_provided_on the way_of_the_breather line._A check valve_is_disposed on_the_breather line and on the other_hand_a solenoid valve is provided on the_by-pass line. The solenoid_valve_is designed to be_opened or closed by a_timer. During an engine stop, the_solenoid valve_is opened_for a predetermined time in order to relieve the pressure in_the recess occupied above the fuel_level.
However, in this prior_art the_pressure_during an engine_operation_is restricted_by the check valve so that the_pressure within_the fuel tank is not reduced_to a level below_the_one determined by the check valve_while an engine is running. A_Wireless Next Generation Standing Committee_(WNG_SC)_of institute of electrical and_electronic engineers (IEEE) 802.11 is an_AD-HOC committee that_a next-generation wireless local area network (WLAN)_in_the medium and long term.
In an_IEEE_conference in March 2013, Broadcom presented_the_need_of discussion of the next-generation_WLAN after IEEE 802.11ac in the_first half of 2013 when an IEEE 802.11ac standard_is finished based_on a WLAN standardization history._A_motion_for foundation of a study group which Orange and Broadcom_proposed in_the IEEE conference_in March 2013 and most members agreed has been passed.
A_scope of IEEE 802.11ax (or a high_efficiency WLAN (HEW)) which the next-generation WLAN study group primarily discusses_the next-generation study group called the HEW includes_1) improving a 802.11 physical (PHY) layer_and a medium access_control_(MAC) layer in bands of 2.4