Inzwa yomoya-mpilo (Lambda probe)

Inzwa ye-oxygen (OC), eyaziwa nangokuthi i-lambda probe, ikala inani lomoya-mpilo kumagesi okukhipha umoya ngokuthumela isignali kuyunithi yokulawula injini (ECU).

Iphi inzwa ye-oxygen

Inzwa ye-oxygen yangaphambili i-DK1 ifakwe ku-multifold exhaust noma kwipayipi yokukhipha umoya ngaphambi kwesiguquli se-catalytic. Njengoba wazi, isiguquli se-catalytic siyingxenye eyinhloko yesistimu yokulawula ukukhishwa kwemoto.

I-lambda probe DK2 yangemuva ifakwe exhaust ngemva kwesiguquli se-catalytic.

Ezinjinini ezingama-4-cylinder, okungenani kufakwe ama-lambda probe amabili. Izinjini ze-V6 ne-V8 okungenani zinezinzwa ezine ze-O2.

I-ECU isebenzisa isignali kusukela kunzwa ye-oxygen yangaphambili ukuze ilungise ingxube yomoya/yephethiloli ngokungeza noma ukunciphisa inani likaphethiloli.

Isignali yenzwa yomoya-mpilo yangemuva isetshenziselwa ukulawula ukusebenza kwesiguquli se-catalytic. Ezimotweni zanamuhla, esikhundleni se-front lambda probe, kusetshenziswa inzwa ye-air-fuel ratio. Isebenza ngokufanayo, kodwa ngokunemba okwengeziwe.

Indlela inzwa ye-oxygen esebenza ngayo

Kunezinhlobo eziningana zama-lambda probes, kodwa ukuze kube lula, kulesi sihloko sizocubungula kuphela izinzwa zomoya-mpilo ezivamile ezikhiqiza i-voltage.

Njengoba igama liphakamisa, inzwa ye-voltage ekhiqiza umoya-mpilo ikhiqiza i-voltage encane ngokulingana nomehluko wenani le-oxygen egesi ephumayo kanye negesi yokukhipha umoya.

Ukuze isebenze kahle, i-lambda probe kufanele ishiselwe ekushiseni okuthile. Inzwa yesimanje ejwayelekile inento yokushisa kagesi yangaphakathi enikwa amandla yi-ECU yenjini.

Lapho ingxube kaphethiloli-yomoya (i-FA) engena enjinini ithambile (uphethiloli omncane nomoya omningi), i-oxygen eyengeziwe ihlala emagesini aphumayo, futhi inzwa ye-oxygen ikhiqiza i-voltage encane kakhulu (0,1-0,2 V).

Uma ama-fuel cells ecebile (uphethiloli omningi futhi awenele umoya), kukhona umoya-mpilo omncane osele ekukhishweni, ngakho-ke inzwa izokhiqiza i-voltage eyengeziwe (cishe i-0,9V).

Ukulungiswa kwesilinganiso se-air-fuel

Inzwa yomoya-mpilo yangaphambili inesibopho sokugcina isilinganiso esiphezulu somoya/samafutha enjini, esingaba yizingxenye ezingu-14,7:1 noma ezingu-14,7 zezingxenye zomoya ukuya engxenyeni engu-1 kaphethiloli.

Iyunithi yokulawula ilawula ukwakheka kwengxube yesibaseli somoya ngokusekelwe kudatha evela kwinzwa yomoya-mpilo yangaphambili. Lapho i-lambda probe yangaphambili ithola amazinga aphezulu komoyampilo, i-ECU ithatha ngokuthi injini igijima kancane (ayinawo uphethiloli owanele) ngakho yengeza uphethiloli.

Lapho izinga le-oksijini ekukhipheni liphansi, i-ECU ithatha ukuthi injini isebenza ngokucebile (uphethiloli omningi) futhi inciphisa ukunikezwa kukaphethiloli.

Le nqubo iyaqhubeka. Ikhompyutha yenjini ihlala ishintsha phakathi kwezingxube ezithambile nezicebile ukuze igcine isilinganiso esiphezulu somoya/samafutha. Le nqubo ibizwa ngokuthi i-closed loop operation.

Uma ubheka isignali ye-voltage yenzwa ye-oxygen ngaphambili, izosukela ku-0,2 volts (i-lean) iye ku-0,9 volts (ecebile).

Uma imoto iqalwa ngamakhaza, inzwa ye-oxygen yangaphambili ayishisi ngokugcwele futhi i-ECU ayisebenzisi isignali ye-DC1 ukuze ilawule ukulethwa kukaphethiloli. Le modi ibizwa ngokuthi i-loop evulekile. Kuphela uma inzwa isifudumeze ngokugcwele lapho isistimu yomjovo kaphethiloli ingena kumodi evaliwe.

Ezimotweni zanamuhla, esikhundleni senzwa evamile ye-oxygen, inzwa ye-wide-band air-fuel ratio ifakiwe. Inzwa yesilinganiso somoya/iphethiloli isebenza ngendlela ehlukile, kodwa inenjongo efanayo: ukunquma ukuthi ingxube yomoya/yephethiloli engena enjini inothile noma ithambile.

Inzwa yesilinganiso se-air-fuel inembe kakhulu futhi ingakala ububanzi obubanzi.

Inzwa ye-oxygen yangemuva

Inzwa ye-oxygen yangemuva noma engezansi ifakwa ku-exhaust ngemva kwesiguquli se-catalytic. Ikala inani le-oxygen emagesi e-exhaust ashiya i-catalyst. Isignali evela ku-lambda probe yangemuva isetshenziselwa ukuqapha ukusebenza kahle kwesiguquli.

Isilawuli sihlala siqhathanisa amasiginali kusuka kuzinzwa ze-O2 zangaphambili nangemuva. Ngokusekelwe kumasiginali amabili, i-ECU iyazi ukuthi isiguquli se-catalytic sisebenza kahle kangakanani. Uma isiguquli se-catalytic sihluleka, i-ECU ivula isibani esithi "Hlola Injini" ukuze sikwazise.

Inzwa yomoya-mpilo yangemuva ingahlolwa kusetshenziswa isithwebuli sokuxilonga, i-adaptha ye-ELM327 enesofthiwe ye-Torque, noma i-oscilloscope.

Ukuhlonza Inzwa Yomoya-mpilo

I-lambda probe yangaphambili ngaphambi kwesiguquli se-catalytic sivame ukubizwa ngokuthi inzwa "ekhuphukayo" noma inzwa 1.

Inzwa yangemuva efakwe ngemuva kwesiguquli se-catalytic ibizwa ngokuthi inzwa ephansi noma inzwa 2.

Injini ejwayelekile yamasilinda angu-4 inebhulokhi elilodwa kuphela (ibhange 1/ibhange 1). Ngakho-ke, enjinini engu-4-cylinder esemgqeni, igama elithi "inzwa ye-1 yasebhange 1" imane isho inzwa ye-oxygen yangaphambili. "I-Bank 1 Sensor 2" - inzwa ye-oxygen yangemuva.

Funda kabanzi: Yini i-Bank 1, Bank 2, inzwa 1, inzwa 2?

Injini engu-V6 noma i-V8 inamabhulokhi amabili (noma izingxenye ezimbili zaleyo "V"). Ngokuvamile, isilinda esiqukethe isilinda #1 sibizwa ngokuthi "ibhange 1".

Abakhiqizi bezimoto abahlukene bachaza iBhange 1 neBhange 2 ngendlela ehlukile. Ukuze uthole ukuthi ibhange 1 nebhange 2 akuphi emotweni yakho, ungabheka encwadini yakho yokulungisa noma ye-Google yonyaka, ukwakheka, imodeli, nosayizi wenjini.

Ukushintsha inzwa ye-oxygen

Izinkinga zenzwa yomoya-mpilo zivamile. Uphenyo lwe-lambda olunephutha lungaholela ekwenyukeni kokusetshenziswa kukaphethiloli, ukungcola okuphezulu kanye nezinkinga zokushayela ezahlukahlukene (ukwehla kwe-rpm, ukusheshisa okungekuhle, ukuntanta kwe-rev, njll.). Uma inzwa ye-oxygen inesici, kufanele ishintshwe.

Ezimotweni eziningi, ukufaka esikhundleni i-DC kuyinqubo elula. Uma ufuna ukufaka esikhundleni senzwa ye-oxygen ngokwakho, ngekhono elithile kanye nebhukwana lokulungisa, akunzima kangako, kodwa ungase udinge isixhumi esikhethekile senzwa (esithombeni).

Ngezinye izikhathi kungase kube nzima ukususa i-lambda probe endala, njengoba ivame ukugqwala kakhulu.

Okunye okufanele ukukhumbule ukuthi ezinye izimoto kwaziwa ukuthi zinezinkinga zokushintshwa kwezinzwa komoyampilo.

Isibonelo, kukhona imibiko yenzwa ye-oksijeni ye-aftermarket edala izinkinga kwezinye izinjini ze-Chrysler. Uma ungaqiniseki, kungcono ukuthi uhlale usebenzisa inzwa yoqobo.