Momwe mungayang'anire valavu yotsuka ndi multimeter

Vavu yoyeretsa ndi gawo lagalimoto la Evaporative Emissions Control (EVAP). Makinawa amathandizira kuti mpweya wamafuta opangidwa ndi injini usathawire ku chilengedwe kapena kubwerera mgalimoto. Amazisunga kwakanthawi mumtsuko wamakala. Valavu imathandizanso kuwongolera kuchuluka kwa nthunzi yamafuta yomwe pamapeto pake imatuluka mumtsuko wa makala.

M'magalimoto amakono, dongosololi ndi solenoid yoyendetsedwa ndi magetsi yolumikizidwa ndi mphamvu ya injini. Valavu yoyeretsa imayamba pang'onopang'ono kuyatsa kuyatsa, koma dongosolo la EVAP silimagwiranso ntchito injini ikatha.

Pali nthawi zina pomwe dongosolo limalephera, zomwe zimawononga thanzi lagalimoto yanu! Izi ndizothandiza mukadziwa kuyesa valavu ya purge ndi multimeter. Kupatula izi, tikambirananso mfundo zotsatirazi: 

• Zotsatira za kulephera kwa adsorber purge valve
• Kodi valavu yoyeretsa iyenera kudulidwa?
• Kodi valavu yoyeretsa yoyipa ingayambitse moto wolakwika

Njira zoyesera valve yoyeretsa ndi multimeter

Chodziwika bwino chotchedwa multimeter ndi chida chothandiza chomwe chimatha kuyeza ma voltage, kukana, ndi mphamvu yamagetsi.

Kuti muyese valve yoyeretsa, yang'anani kukana pakati pa ma terminals.

Njirayi imatha kusiyana kutengera mtundu wagalimoto, koma njira zoyambira zimakhala zofanana.

Pansipa pali njira zomwe zingagwiritsidwe ntchito kuyesa valavu yoyeretsa yomwe ili gawo la dongosolo la EVAP: 

1. KupezaChinthu choyamba kuchita ndikuzimitsa injini kwa mphindi zosachepera 15-30. Pambuyo pake, yesani kupeza mavavu oyeretsa agalimoto. Moyenera, imatha kupezeka kuseri kwa muffler kapena muffler ndikuyika pamwamba. Ichi ndi EVAP mpweya fyuluta ndi valavu purge mkati. Kuti mudziwe zambiri za komwe kuli makina, yesani kufufuza bukhu la eni galimoto yanu kapena kupeza chitsanzo pa intaneti chokhala ndi chithunzi cha injini.
2. Kusintha kwa chingweMukapeza valavu yotsuka, mudzawona kuti chingwe cha 2-pin chikugwirizana ndi chipangizocho. Chotsatira ndikuchotsa ndikuzilumikizanso pogwiritsa ntchito zingwe za adapter multimeter zomwe nthawi zambiri zimaphatikizidwa muzoyesa. Akhozanso kugulidwa mosiyana. Ma terminal a valve purge ayenera kulumikizidwa ndi zingwe za multimeter.
3. Kuyesa Gawo lomaliza ndikuyesa kukana. Miyezo yoyenera iyenera kukhala pakati pa 22.0 ohms ndi 30.0 ohms; chilichonse chapamwamba kapena chotsika chidzatanthauza kuti valve iyenera kusinthidwa. Izi zitha kuchitika patsamba ngati muli ndi zotsalira; apo ayi, ngati mukufuna kupita nayo ku sitolo, onetsetsani kuti mwalumikizanso ma waya monga kale.

Kodi ndingadziwe bwanji ngati valavu yanga yoyeretsa ili yolakwika?

Pali zizindikiro zambiri za dongosolo la EVAP lomwe silikuyenda bwino. Samalani ndi:

Kuwala kwa injini Injini imayang'anira purge solenoid ndipo ngati china chake sichikuyenda bwino, kuwala kwa injini kumayaka. Ngati mulingo wapamwamba kapena wotsika wa mpweya wotsuka upezeka, ma code olakwika amawonetsedwa, kuphatikiza P0446 kapena P0441. Tikukulimbikitsani kupita ndi galimoto kumalo okonzera ngati muwona zizindikiro zomwe zili pamwambazi.

Mavuto a injini Ngati valavu yotsuka sinatsekedwe, chiŵerengero chamafuta a mpweya chikhoza kukhudzidwa kwambiri ndi nthunzi yothawira ku chilengedwe. Injini imayankha kusinthako, zomwe zimapangitsa kuti pakhale zovuta kuyambitsa kapena kusokoneza.

Kugwiritsa ntchito mafuta ochepa Pamene dongosolo la EVAP silikugwira ntchito bwino, limachepetsa mtunda wa mpweya. M'malo mounjikana mu valavu yoyeretsa, mpweya wamafuta umayamba kulowa m'malo, ndikupangitsa kuyaka kwamafuta.

Kuchita bwino pamayeso akunja EVAP canister ili ndi udindo wowongolera mpweya wamafuta ku injini. Izi zimathandiza kupewa kutuluka kwa utsi wapoizoni m'chilengedwe. Pakachitika solenoid yolakwika, sichitha kuwongolera utsi ndikulephera kuyesa kwa mpweya.

Mapepala owonongeka Popeza nthunzi sangathe kudutsa ngati valavu ikulephera, kuthamanga kumayamba kuwonjezeka. M'kupita kwa nthawi, imakhala yochuluka kwambiri moti imatha kuwomba zisindikizo za rabara ndi gaskets. Zotsatira zake zidzakhala kutayikira kwamafuta, komwe kumatha kulowa mu injini yayikulu kuchokera ku utsi, kuwononga kwambiri. Chifukwa chomwe chimapangitsa kuti valavu ya blowdown igwire bwino ntchito ndikuti zidutswa za carbon kapena zakunja zimakakamira, ndikusiya makinawo atatsekedwa kapena kutseguka. Imafunika kusinthidwa kapena kuyeretsedwa.

Kodi valavu yoyeretsa iyenera kudulidwa?

Yankho lalifupi la funsolo ndi inde! Valavu yoyeretsa nthawi zambiri imapanga phokoso kapena kugwedeza. Komabe, m'galimoto yokhala ndi mawindo otsekedwa, izi siziyenera kuonekera. Ngati ikulira kwambiri ndipo imatha kumveka mkati mwagalimoto, ikhoza kukhala chifukwa chodetsa nkhawa. Solenoid iyenera kuyang'aniridwa.

Chotheka chimodzi ndi chakuti valavu yoyeretsa inayamba kulowetsa mpweya mu injini pamene ikuwonjezera mafuta. Izi zitha kuyambitsa zovuta komanso zovuta monga tafotokozera pamwambapa.

Kodi valavu yoyeretsa yoyipa ingayambitse kusawombera?

 Valve yolakwika yoyeretsa imatha kupangitsa kuti pakhale vuto ngati zinthu sizikuyendetsedwa kwakanthawi. Pamene utsi umayamba kuwonjezereka kwambiri mu dongosolo la EVAP kapena mu fyuluta ya malasha, valavu sidzatha kutsegula nthawi.

Ntchitoyi ikapitirira pakapita nthawi, utsi umalowa mu masilinda a injini, zomwe zimapangitsa kuyaka kwamafuta ndi utsi wambiri. Kuphatikizikaku kumapangitsa injini kuyimitsa kenako ndikuwotcha. (1)

Chigamulo chomaliza

Valve ya solenoid ndi gawo lofunikira pamagalimoto. Ngati muwona vuto lililonse lomwe latchulidwa pamwambapa, galimotoyo iyenera kukonzedwa mwamsanga. Ngati mukufuna kuyesa canister nokha, mukhoza kutsata ndondomekoyi ndi multimeter ndipo chipangizocho chidzakuuzani ngati muli ndi valve yoipa! (2)

Popeza takuwonetsani momwe mungayang'anire valavu ya purge ndi multimeter, mutha kuyang'ananso. Mungafune kuyang'ana kalozera wabwino kwambiri wosankha ma multimeter ndikusankha yomwe ikugwirizana ndi zosowa zanu.

Tikukhulupirira kuti nkhaniyi ikuthandizani. Zabwino zonse!

ayamikira

(1) EVAP dongosolo - https://www.youtube.com/watch?v=g4lHxSAyf7M (2) valavu solenoid - https://www.sciencedirect.com/topics/earth-and-planetary-sciences/solenoid-valve