Oxygen Sensor (Lambda bincike)
Abubuwa
Na'urar firikwensin oxygen (OC), wanda kuma aka sani da binciken lambda, yana auna adadin iskar oxygen a cikin iskar gas ta hanyar aika sigina zuwa sashin kula da injin (ECU).
Inda iskar oxygen take
Ana shigar da firikwensin iskar oxygen DK1 a cikin ma'ajin shaye-shaye ko a cikin bututun shaye-shaye na gaba kafin mai juyawa. Kamar yadda kuka sani, mai canza motsi shine babban ɓangaren tsarin sarrafa hayaƙin abin hawa.
An shigar da binciken lambda na baya DK2 a cikin shaye-shaye bayan mai canzawa mai kati.
A kan injuna 4-Silinda, aƙalla ana shigar da binciken lambda biyu. Injin V6 da V8 suna da aƙalla firikwensin O2 guda huɗu.
ECU tana amfani da sigina daga firikwensin iskar oxygen na gaba don daidaita mahaɗin iska / man fetur ta ƙara ko rage yawan man fetur.
Ana amfani da siginar firikwensin iskar oxygen ta baya don sarrafa aikin mai canza kuzari. A cikin motocin zamani, maimakon binciken lambda na gaba, ana amfani da firikwensin rabon iskar mai. Yana aiki iri ɗaya, amma tare da ƙarin daidaito.
Yadda firikwensin oxygen ke aiki
Akwai nau'ikan binciken lambda da yawa, amma don sauƙi, a cikin wannan labarin za mu yi la'akari da na'urori masu auna iskar oxygen na yau da kullun waɗanda ke haifar da ƙarfin lantarki.
Kamar yadda sunan ya nuna, wutar lantarki da ke haifar da firikwensin oxygen yana haifar da ƙaramin ƙarfin lantarki daidai da bambancin adadin iskar oxygen a cikin iskar gas da kuma a cikin iskar gas.
Don aiki mai kyau, dole ne a yi zafi da binciken lambda zuwa wani zafin jiki. Na'urar firikwensin zamani yana da kayan dumama wutar lantarki na ciki wanda injin ECU ke aiki dashi.
Lokacin da cakuda man fetur-iska (FA) shiga cikin injin ya kasance mai laushi (ƙadan man fetur da iska mai yawa), ƙarin iskar oxygen ya rage a cikin iskar gas, kuma firikwensin oxygen yana samar da ƙananan ƙarfin lantarki (0,1-0,2 V).
Idan ƙwayoyin man fetur suna da wadata (man fetur da yawa kuma bai isa ba), akwai ƙarancin iskar oxygen da ya rage a cikin shaye, don haka firikwensin zai haifar da ƙarin ƙarfin lantarki (kimanin 0,9V).
Daidaita rabon iskar man fetur
Na'urar firikwensin iskar oxygen na gaba shine ke da alhakin kiyaye mafi kyawun yanayin iska / man fetur don injin, wanda shine kusan 14,7: 1 ko sassan 14,7 iska zuwa kashi 1 mai.
Naúrar sarrafawa tana daidaita abubuwan da ke tattare da cakuda iskar man fetur dangane da bayanai daga firikwensin iskar oxygen na gaba. Lokacin da binciken lambda na gaba ya gano manyan matakan iskar oxygen, ECU yana ɗaukan injin ɗin yana aiki da ƙarfi (bai isa ba) don haka yana ƙara mai.
Lokacin da iskar oxygen a cikin shaye-shaye ya yi ƙasa, ECU yana ɗauka cewa injin yana gudana mai wadata (man mai da yawa) kuma yana rage wadatar mai.
Wannan tsari yana ci gaba. Kwamfutar injin tana canzawa koyaushe tsakanin gaurayawan raɗaɗi da wadataccen gauraya don kula da mafi kyawun yanayin iska/man mai. Ana kiran wannan tsari rufaffiyar madauki aiki.
Idan ka kalli siginar firikwensin iskar oxygen na gaba, zai kasance daga 0,2 volts (kwanciyar hankali) zuwa 0,9 volts (mai arziki).
Lokacin da abin hawa ya fara sanyi, firikwensin oxygen na gaba baya dumama kuma ECU baya amfani da siginar DC1 don daidaita isar da mai. Ana kiran wannan yanayin buɗe madauki. Sai kawai lokacin da firikwensin ya ɗumama sosai, tsarin allurar mai yana shiga yanayin rufaffiyar.
A cikin motocin zamani, maimakon na'urar firikwensin oxygen na al'ada, ana shigar da na'urar firikwensin iska-mai fadi. Na'urar firikwensin rabon iskar / man fetur yana aiki daban, amma yana da manufa ɗaya: don sanin ko cakuda iska / man da ke shiga injin yana da wadata ko jingina.
Firikwensin rabon iskar mai ya fi daidai kuma yana iya auna kewayo mai faɗi.
Rear oxygen haska
Ana shigar da firikwensin iskar oxygen na baya ko na ƙasa a cikin shaye-shaye bayan mai canzawa. Yana auna adadin iskar oxygen a cikin iskar gas da ke barin mai kara kuzari. Ana amfani da sigina daga binciken lambda na baya don lura da ingancin mai canzawa.
Mai sarrafawa koyaushe yana kwatanta sigina na gaba da na baya O2 firikwensin. Dangane da sigina guda biyu, ECU ya san yadda mai sauya mai catalytic ke aiki. Idan mai juyawa ya gaza, ECU tana kunna hasken "Check Engine" don sanar da kai.
Ana iya bincika firikwensin oxygen na baya tare da na'urar daukar hoto, adaftar ELM327 tare da software na Torque, ko oscilloscope.
Gano Sensor Oxygen
Binciken lambda na gaba a gaban mai canza catalytic ana kiransa firikwensin "na sama" ko firikwensin 1.
Na'urar firikwensin baya da aka shigar bayan mai canza catalytic ana kiransa firikwensin ƙasa ko firikwensin 2.
Injin silinda 4 na layi na yau da kullun yana da toshe ɗaya kawai (banki 1/banki 1). Don haka, akan injin silinda 4 na layi, kalmar "Banki 1 Sensor 1" kawai tana nufin firikwensin oxygen na gaba. "Bank 1 Sensor 2" - rear oxygen firikwensin.
Kara karantawa: Menene Bank 1, Bank 2, Sensor 1, Sensor 2?
Injin V6 ko V8 yana da tubalan biyu (ko sassa biyu na waccan "V"). Yawanci, shingen Silinda mai ɗauke da Silinda #1 ana kiransa "banki 1".
Masu kera motoci daban-daban sun bayyana Bank 1 da Bank 2 daban. Don gano inda banki 1 da banki 2 suke a motar ku, zaku iya bincika shekarar, yin, ƙira, da girman injin a cikin littafin gyaran ku ko Google.
Maye gurbin iskar oxygen
Matsalolin firikwensin oxygen sun zama ruwan dare gama gari. Kuskuren binciken lambda na iya haifar da ƙara yawan man fetur, ƙara yawan hayaki da matsalolin tuki iri-iri (digin rpm, rashin saurin sauri, rev float, da sauransu). Idan firikwensin iskar oxygen ba shi da lahani, dole ne a maye gurbinsa.
A yawancin motoci, maye gurbin DC hanya ce mai sauƙi mai sauƙi. Idan kuna son maye gurbin firikwensin oxygen da kanku, tare da wasu fasaha da jagorar gyara, ba haka ba ne mai wahala, amma kuna iya buƙatar mai haɗawa na musamman don firikwensin (hoto).
Wani lokaci yana iya zama da wahala a cire tsohuwar binciken lambda, saboda sau da yawa yana tsatsa da yawa.
Wani abu da za a tuna shi ne cewa an san wasu motoci suna da matsala tare da maye gurbin na'urorin oxygen.
Misali, akwai rahotannin wani firikwensin iskar oxygen da ke haifar da matsala akan wasu injunan Chrysler. Idan ba ku da tabbas, yana da kyau koyaushe ku yi amfani da firikwensin asali.
