Inzwa yokugeleza komoya (MAF), eyaziwa nangokuthi imitha yokugeleza komoya, ingenye yezinzwa ezibalulekile zenjini ye-EFI.Iguqula ukugeleza komoya ohogeliwe kube isignali kagesi futhi iyithumele ku-electronic control unit (ECU).Njengenye yezimpawu eziyisisekelo zokunquma umjovo kaphethiloli, iyinzwa ekala ukugeleza komoya enjinini.I-YASEN ingumkhiqizi ohamba phambili we-MAF sensor china.
Inzwa yokugeleza komoya (i-MAF) ifakwa phakathi kwesihlungi somoya kanye ne-multifold intake ukukala ikhwalithi yomoya engena enjinini.I-ECM ibala ububanzi bokushaya komjovo kaphethiloli kanye ne-engeli eyisisekelo yokuthungela ngokusekelwe kusignali ye-MAF.
I-hot-wire mass flow flow (MAF)
I-hot wire mass air flow (MAF) isiyingi senzwa yakhiwe inzwa, imojula yokulawula kanye nocingo oluxhuma ezinye izingxenye ezimbili.Inzwa ikhipha isignali yebhange lamandla kagesi we-DC kumojula yokulawula amandla (ECM), ubude bayo obulingana nomthamo womoya wokungenisa injini.
Isakhiwo esiyisisekelo senzwa yokugeleza komoya yentambo eshisayo sihlanganisa i-platinamu yocingo olushisayo (intambo yokushisisa kagesi) ezwa ukugeleza komoya, into evimbela isinxephezelo sezinga lokushisa (intambo ebandayo) elungiswayo ngokuya ngezinga lokushisa lokungenisa umoya, ishaja engenantambo yebhodi lesifunda. elawula ukusebenza kwentambo eshisayo futhi ikhiqize isignali yokuphumayo, kanye negobolondo lenzwa yokugeleza komoya nezinye izingxenye.
Ngemva kokuvula iswishi yenzwa yokunyakaza kokukhanyisa, intambo eshisayo yeplatinamu iba namandla futhi ikhiqize ukushisa.Lapho umoya ugeleza kule ntambo, ukupholisa kwentambo eshisayo kuhambisana nenani lokungenisa komoya.I-ECM igcina izinga lokushisa locingo olushisayo lingaguquki ngokulawula ukugeleza kwamanje ocingweni olushisayo, ukuze okwamanje kulingane nenani lokungenisa komoya, kuyilapho i-ECM ingakwazi ukukala inani lamanje lokungenisa komoya ngokuthola amandla amanje anamandla.
Izici zenzwa yokugeleza komoya ziwusayizi omncane, isisindo esilula, ukufundwa kokubonisa okunembile nokucacile, ukuthembeka okuphezulu, okungathinteki ukunikezwa kwamandla kwangaphandle, kanye nokuphikisana nombani.
Iphutha elenzeka nokuxilongwa kwenzwa yokugeleza komoya
Amaphutha enzwa yokugeleza komoya (MAF) ahlukaniswe izigaba ezimbili.Enye iwukuthi isignali idlula ububanzi obucacisiwe, okubonisa ukuthi inzwa yokugeleza komoya yehlulekile.Izimoto zesimanje ezilawulwa ngogesi zinomsebenzi wokuvikela ukwehluleka.Uma isignali yenzwa yehluleka, iyunithi yokulawula ye-elekthronikhi (ECU) izothatha indawo yayo ngevelu engashintshi, noma imiselele isignali yenzwa engalungile ngesignali yezinye izinzwa.Ngemuva kokuthi inzwa ye-MAF ihlulekile, i-ECU iyishintsha ngesignali yenzwa ye-throttle position.Enye inkinga isignali engalungile (okungukuthi ukusebenza kwe-drift).Isignali yenzwa yokugeleza komoya enganembile ingase ibe yingozi kakhulu njenge-salmosan azamethiphos kunokungabi nasignali.Njengoba isignali ingeqi ububanzi obucacisiwe, iyunithi yokulawula i-electronic (ECU) izolawula inani lomjovo wephethiloli ngokusho kwalesi siginali sokugeleza komoya esingalungile, ngakho-ke, ingxube izoba mncane kakhulu noma icebile kakhulu.Uma ingekho isignali yokugeleza komoya, i-ECU izosebenzisa isignali yenzwa ye-throttle position esikhundleni, futhi isivinini sokungenzi lutho senjini sizinzile.
Uma isignali yenzwa yokugeleza komoya ihluleka, izenzakalo eziyinhloko zokwehluleka kuwubunzima bokuqalisa, ukungenzi kahle, ukusheshisa okubuthakathaka, ukusetshenziswa kabi kukaphethiloli nokusebenza kokukhipha umoya (EGR), njll. Isibonelo, isixhumi senzwa ye-MAF yemoto asifakiwe kahle, njenge- umphumela, inzwa iyaxega ngemva kokuba imoto iqale.Ngale ndlela, inani lesignali ye-voltage elitholwe inzwa ye-MAF ine-portafilter eshintshashintshayo ngokushesha (izinguquko eziphezulu neziphansi).I-ECM ilawula ububanzi bokushaya komjovo kaphethiloli ngokusekelwe kule siginali, okubangela ukuthi injini ingasebenzi kahle.
Izizathu eziyinhloko zokwehluleka kwe-MAF:
- Ukulimala kwangaphakathi kwenzwa;
- Indlela yokufaka engalungile yenzwa(reverse)
- Isekhethi evuliwe/efushane yetheminali yezinzwa noma ulayini
Ukwelashwa kwenzwa ye-hot film air flow (MAF) eyonakele
Uma i-voltage yokunikezwa kwamandla iphezulu kakhulu noma kukhona i-voltage ephezulu esheshayo, inzwa yefilimu eshisayo yokugeleza komoya kulula ukuyishisa.Isizathu sokuthi kungani i-voltage ephezulu yesekethe iphezulu kakhulu (ngaphezu kuka-16V) imvamisa ukuthi ibhethri ihlukumezeka kakhulu, okwehlisa umthamo wayo futhi ayikwazi ukumunca i-voltage ephezulu yejeneretha.Ngakho-ke, i-vulcanization yebhethri ingenye yezizathu zokulimala kwenzwa yefilimu eshisayo yokugeleza komoya.Isixazululo ukufaka i-"7812" i-terminal voltage voltage stabilizing integrated circuit in the end of the hot film air flow sensor.
Isiphetho
Inzwa ye-MAF iyizingxenye ezibalulekile zemoto, kuyadingeka ukuthi abantu babe nokuqonda kafushane ukuthi bangaxilonga kanjani futhi balungise umonakalo wayo.Empeleni baningi abahlinzeki benzwa base-China abaningi, ukuze uthole ulwazi olwengeziwe, pls xhumana no-YASEN.
Isikhathi sokuthumela: Nov-24-2021