Yuav ua li cas txheeb xyuas lub valve nrog lub multimeter
Txheem
Lub valve ntxuav yog ib feem ntawm lub tsheb Evaporative Emissions Control (EVAP) system. Lub tshuab pab tiv thaiv cov roj vapors tsim los ntawm lub cav los ntawm kev khiav mus rau ib puag ncig lossis rov qab mus rau hauv lub tsheb. Nws khaws cia rau lawv ib ntus hauv ib lub kaus poom. Lub valve tseem pab tswj cov roj vapor uas nws thiaj li tshuab tawm ntawm lub tshuab hluav taws xob.
Nyob rau hauv cov tsheb niaj hnub, lub kaw lus yog ib qho hluav taws xob tswj solenoid txuas nrog lub cav fais fab. Lub pob valve maj mam tig rau sai li sai tau thaum lub ignition yog qhib, tab sis EVAP system kuj tsis ua hauj lwm thaum lub cav tawm.
Muaj qee lub sij hawm thaum lub kaw lus tsis ua haujlwm, uas ua rau kev noj qab haus huv ntawm koj lub tsheb! Qhov no yog ib qho yooj yim thaum koj paub yuav ua li cas kuaj lub valve nrog lub multimeter. Ntxiv rau qhov no, peb tseem yuav tham txog cov ntsiab lus hauv qab no:
- Qhov tshwm sim ntawm qhov tsis ua haujlwm ntawm qhov adsorber tshem tawm valve
- Yuav tsum tau tshem tawm valve nyem?
- Puas tuaj yeem ua rau lub cev tsis zoo ua rau muaj qhov tsis zoo
Txoj hauv kev los ntsuam xyuas lub valve nrog lub multimeter
Lub npe hu ua multimeter yog ib qho khoom siv uas tuaj yeem ntsuas qhov voltage, tsis kam, thiab hluav taws xob tam sim no.
Txhawm rau kuaj xyuas lub valve, xyuas qhov kev tawm tsam ntawm cov terminals.
Cov txheej txheem yuav txawv nyob ntawm tus qauv tsheb, tab sis cov kauj ruam yooj yim tseem zoo ib yam.
Cov npe hauv qab no yog cov kauj ruam dav dav uas tuaj yeem siv los kuaj lub valve uas yog ib feem ntawm EVAP system:
- Qhov chawThawj qhov uas yuav tsum tau ua yog tua lub cav rau tsawg kawg 15-30 feeb. Tom qab ntawd, sim nrhiav lub tsheb tshem tawm li qub. Qhov zoo tshaj plaws, nws tuaj yeem pom tom qab muffler lossis muffler thiab muab tso rau saum. Qhov no yog ib qho EVAP carbon lim nrog ib tug huv valve sab hauv. Yog xav paub ntxiv txog qhov chaw ntawm lub kaw lus, sim tshawb xyuas lub tsheb tus tswv phau ntawv lossis nrhiav tus qauv hauv online nrog lub cav duab.
- Kev hloov kho cableThaum koj pom lub pob valve, koj yuav pom tias 2-pin harness txuas nrog lub cuab yeej. Cov kauj ruam tom ntej yog txiav tawm thiab rov txuas dua lawv siv cov multimeter adapter cables uas feem ntau suav nrog hauv cov khoom siv kuaj. Lawv kuj tuaj yeem yuav khoom sib cais. Lub purg valve terminals yuav tsum tau txuas nrog lub multimeter cables.
- Kev Ntsuam Xyuas Cov kauj ruam kawg yog ntsuas qhov tsis kam. Qhov zoo tshaj plaws yuav tsum nyob nruab nrab ntawm 22.0 ohms thiab 30.0 ohms; txhua yam siab dua lossis qis dua yuav txhais tau tias lub valve yuav tsum tau hloov. Qhov no tuaj yeem ua tiav ntawm qhov chaw yog tias koj muaj qhov seem; txwv tsis pub, yog tias koj xav coj nws mus rau lub khw, nco ntsoov rov txuas cov hlua hlua khi li qub.
Kuv yuav ua li cas thiaj paub yog tias kuv lub qhov purg valve faulty?
Muaj ntau cov tsos mob ntawm kev ua haujlwm tsis zoo ntawm EVAP. Ua tib zoo mloog rau:
Cav teeb Lub cav tswj cov kua dej solenoid thiab yog tias muaj qee yam yuam kev, lub teeb lub cav yuav tuaj. Yog tias kuaj pom qhov siab dua lossis qis dua ntawm cov pa nqus pa, cov lej yuam kev tau tshwm sim, suav nrog P0446 lossis P0441. Peb pom zoo kom coj lub tsheb mus rau lub khw kho yog tias koj pom cov tsos mob saum toj no.
Teeb meem cav Yog tias lub valve tsis raug kaw, huab cua-roj piv yuav raug cuam tshuam los ntawm kev khiav tawm ntawm cov pa mus rau ib puag ncig. Lub cav yuav teb rau qhov kev hloov pauv, uas ua rau pib nyuaj lossis idling ntxhib.
Tsawg roj noj Thaum lub EVAP system tsis ua hauj lwm zoo, nws inevitably txo roj mileage. Es tsis txhob accumulating nyob rau hauv lub purge valve, roj vapor yuav pib nkag mus rau hauv ib puag ncig, ua rau muaj zog combustion ntawm cov roj.
Kev ua haujlwm tsis zoo nyob rau hauv qhov kev xeem outlier Lub EVAP canister yog lub luag hauj lwm rau redirecting roj vapors rov qab mus rau lub cav. Qhov no pab tiv thaiv kev tso tawm cov pa phem rau hauv ib puag ncig. Nyob rau hauv qhov kev tshwm sim ntawm ib tug faulty solenoid, nws yuav tsis muaj peev xwm tswj cov pa luam yeeb thiab ua tsis tiav cov emissions xeem.
Cov ntaub qhwv puas lawm Txij li cov vapors yuav tsis tuaj yeem dhau yog tias lub valve tsis ua haujlwm, lub siab yuav pib tsim. Nyob rau tib lub sijhawm, nws yuav khaus heev uas nws tuaj yeem tshuab tawm cov roj hmab ntsaws ruaj ruaj thiab gaskets. Qhov tshwm sim yuav yog cov roj to, uas tuaj yeem nkag mus rau lub cav tseem ceeb los ntawm cov pa tawm, ua rau muaj kev puas tsuaj loj. Feem ntau yog vim li cas rau lub tshuab nqus tsev vacuum ua haujlwm zoo kawg nkaus yog cov khoom ntawm cov pa roj carbon lossis cov khoom txawv teb chaws tau daig, tawm hauv lub tshuab ua haujlwm ib nrab los yog qhib. Xav tau kev hloov lossis tu.
Yuav tsum tau tshem tawm valve nyem?
Cov lus teb luv luv rau cov lus nug yog yog! Lub purg valve feem ntau ua rau nyem los yog ticking suab. Txawm li cas los xij, hauv lub tsheb nrog lub qhov rais kaw, nws yuav tsum tsis txhob hnov qab. Yog tias nws nrov dhau thiab tuaj yeem hnov hauv lub tsheb, nws tuaj yeem ua rau muaj kev txhawj xeeb. Lub solenoid yuav tsum tau kuaj xyuas.
Ib qho ua tau yog tias lub tshuab ntxuav tais diav pib cia vapor rau hauv lub cav thaum refueling. Qhov no yuav ua rau kev pib tsis zoo thiab teeb meem raws li tau hais los saum no.
Lub valve puas tuaj yeem ua rau tsis zoo?
Lub faulty purge valve tuaj yeem ua rau muaj qhov tsis zoo yog tias qhov xwm txheej raug tso tseg tsis saib xyuas ib ntus. Raws li cov pa taws pib tsim ntau dhau hauv EVAP system lossis hauv cov lim dej, lub valve yuav tsis tuaj yeem qhib rau lub sijhawm.
Yog tias cov txheej txheem txuas ntxiv mus dhau sijhawm, cov pa taws yuav nkag mus rau hauv lub tog raj kheej lub cav, uas ua rau muaj qhov sib txawv ntawm cov roj thiab cov pa taws. Qhov kev sib xyaw ua ke no yuav ua rau lub cav nres thiab tom qab ntawd misfire. (1)
Thaum kawg kev txiav txim
Lub solenoid valve yog ib qho tseem ceeb ntawm lub tsheb. Yog tias koj pom ib qho teeb meem hauv qab no, lub tsheb yuav tsum tau kho tam sim ntawd. Yog tias koj xav sim lub kaus mom koj tus kheej, koj tuaj yeem ua raws li cov kauj ruam nrog lub multimeter thiab cov cuab yeej yuav qhia rau koj yog tias koj muaj lub valve tsis zoo! (2)
Txij li thaum peb tau qhia koj yuav ua li cas txhawm rau txhawm rau tshem tawm lub valve nrog multimeter, koj tuaj yeem tshawb xyuas. Tej zaum koj yuav xav tshawb xyuas cov ntawv qhia kev xaiv multimeter zoo tshaj plaws thiab txiav txim siab seb qhov twg haum rau koj cov kev xav tau kuaj.
Peb cia siab tias tsab xov xwm no yuav pab tau koj. Hmoov zoo!
tswv yim pom zoo
(1) EVAP system - https://www.youtube.com/watch?v=g4lHxSAyf7M (2) solenoid valve - https://www.sciencedirect.com/topics/earth-and-planetary-sciences/solenoid-valve
