Mfundo ndi kuyesa kwa sensa yamagetsi yamagetsi yamagalimoto

Air flow sensor (MAF), yomwe imadziwikanso kuti air flow mita, ndi imodzi mwama sensor ofunikira a injini ya EFI.Amasintha kutuluka kwa mpweya wokokedwa kukhala chizindikiro chamagetsi ndikutumiza ku gawo lowongolera zamagetsi (ECU).Monga chimodzi mwazizindikiro zodziwira jakisoni wamafuta, ndi sensor yomwe imayesa kutuluka kwa mpweya mu injini.YASEN ndiwopanga makina otsogola a MAF ku China.

Sensor ya air flow (MAF) imayikidwa pakati pa fyuluta ya mpweya ndi manifold olowa kuti ayeze momwe mpweya umalowa mu injini.ECM imawerengera kuchuluka kwa jakisoni wamafuta ndi mbali yoyambira yoyatsira kutengera chizindikiro cha MAF.

Kuthamanga kwa mpweya wotentha (MAF)

The hot wire mass air flow (MAF) sensor circuit imapangidwa ndi sensa, module control ndi waya wolumikiza mbali zina ziwiri.Sensa imatulutsa chizindikiro cha banki yamagetsi ya DC ku gawo lowongolera mphamvu (ECM), matalikidwe ake omwe amafanana ndi kuchuluka kwa mpweya wa injini.

Kapangidwe kake ka sensa yotentha ya air flow sensor imakhala ndi waya wotentha wa platinamu (waya wotentha wamagetsi) womwe umamva kutuluka kwa mpweya, chowongolera kutentha (waya wozizira) chomwe chimakonzedwa molingana ndi kutentha kwa mpweya, chowongolera chowongolera ma waya opanda zingwe. yomwe imayang'anira mawaya otentha ndikutulutsa chizindikiro, ndi chipolopolo cha sensa ya mpweya ndi zigawo zina.

Mukayatsa chosinthira cha sensor yoyatsira, waya wotentha wa platinamu umakhala ndi mphamvu ndikupanga kutentha.Mpweya ukadutsa muwayawu, kuziziritsa kwa waya wotentha kumafanana ndi kuchuluka kwa mpweya.ECM imasunga kutentha kwa waya wotentha nthawi zonse poyang'anira momwe mpweya ukuyendera kudzera mu waya wotentha, kotero kuti panopa ndi yofanana ndi kuchuluka kwa mpweya, pamene ECM imatha kuyeza kuchuluka kwa mpweya wamakono pozindikira mphamvu yamagetsi.

Makhalidwe a sensa ya mpweya ndi kukula kwazing'ono, kulemera kwake, kuwerengera momveka bwino komanso momveka bwino, kudalirika kwakukulu, osakhudzidwa ndi magetsi akunja, ndi anti-mphezi.

Chochitika cholakwika ndi kuzindikira kwa sensa ya air flow

Zolakwika za sensa ya air flow(MAF) zimagawidwa m'magulu awiri.Chimodzi ndi chakuti chizindikirocho chimaposa mzere wotchulidwa, kusonyeza kuti mpweya wa mpweya walephera.Magalimoto amakono oyendetsedwa ndi magetsi ali ndi ntchito yoteteza kulephera.Chizindikiro cha sensa chikalephera, chipangizo chowongolera zamagetsi (ECU) chidzalowa m'malo mwake ndi mtengo wokhazikika, kapena m'malo mwa chizindikiro cha sensor yolakwika ndi chizindikiro cha masensa ena.Sensa ya MAF ikalephera, ECU imalowetsamo chizindikiro cha throttle position sensor.Vuto lina ndi chizindikiro cholakwika (mwachitsanzo, kuyendetsa bwino).Chizindikiro cholakwika cha sensa ya mpweya chikhoza kukhala chovulaza ngati salmosan azamethiphos kusiyana ndi kusazindikira.Popeza kuti chizindikirocho sichikupitirira malire otchulidwa, chipangizo chowongolera zamagetsi (ECU) chidzalamulira kuchuluka kwa jekeseni wa mafuta molingana ndi chizindikiro cholakwika cha mpweya, motero, kusakaniza kudzakhala kochepa kwambiri kapena kolemera kwambiri.Ngati palibe chizindikiro choyendetsa mpweya, ECU idzagwiritsa ntchito chizindikiro cha throttle position m'malo mwake, ndipo kuthamanga kwa injini kumakhala kokhazikika.

Pamene chizindikiro cha sensa ya mpweya chikulephera, zochitika zazikulu zolephera zimakhala zovuta poyambira, kusagwira ntchito bwino, kuthamangitsidwa kofooka, kuperewera kwa mafuta ndi kutulutsa mphamvu (EGR), ndi zina zotero. Zotsatira zake, sensa imamasuka galimoto ikayamba.Mwanjira iyi, mtengo wamakina amagetsi odziwika ndi sensor ya MAF imakhala ndi ma portafilter othamanga (zosintha zazikulu ndi zotsika).ECM imayang'anira kuchuluka kwa jakisoni wamafuta kutengera chizindikiro ichi, zomwe zimapangitsa kuti injini isayende bwino.

Zifukwa zazikulu za kulephera kwa MAF:

• Kuwonongeka kwamkati kwa sensa;
• Kuyika kolakwika kwa sensa (reverse)
• Tsegulani / lalifupi la sensor terminal kapena mzere

Chithandizo cha sensa yowonongeka ya hot film air flow (MAF).

Mphamvu yamagetsi ikakhala yokwera kwambiri kapena pali voteji yam'mwamba nthawi yomweyo, sensa yotulutsa mpweya wotentha imakhala yosavuta kuwotcha.Chifukwa chomwe nsonga yamagetsi yamagetsi imakhala yokwera kwambiri (kuposa 16V) nthawi zambiri ndikuti batire imakhudzidwa kwambiri, zomwe zimachepetsa mphamvu yake ndipo sizitha kuyamwa mphamvu yayikulu ya jenereta.Choncho, batire vulcanization ndi chimodzi mwa zifukwa kuwonongeka kwa otentha filimu mpweya otaya kachipangizo.Yankho lake ndikukhazikitsa "7812" ma voltage terminal atatu okhazikika okhazikika kumapeto kwa sensa yotentha ya air flow.

Mapeto

MAF sensor ndi gawo lofunikira pagalimoto, ndikofunikira kuti anthu amvetsetse mwachidule momwe angadziwire ndikukonza kuwonongeka kwake.Kwenikweni pali ambiri ogulitsa ma sensor aku China, kuti mumve zambiri, pls lemberani YASEN.