Lambda firikwensin, wanda kuma aka sani da iskar oxygen ko λ-sensor, wani nau'in sunan firikwensin ne wanda sau da yawa muke iya ji.Ana iya gani daga sunan cewa aikinsa yana da alaƙa da "abincin oxygen".Gabaɗaya akwai na'urori masu auna iskar oxygen guda biyu, ɗaya a bayan bututun shayewa, ɗayan kuma a bayan mai mu'amalar catalytic mai hanya uku.Na farko ana kiran na'urar firikwensin iskar oxygen na gaba, kuma na karshen ana kiransa firikwensin oxygen na baya.
Na'urar firikwensin iskar oxygen yana ƙayyade ko man yana ƙone kullum ta hanyar gano abubuwan da ke cikin iskar oxygen a cikin jadawalin.Sakamakon ganowa yana ba ECU mahimman bayanai don sarrafa rabon iskar man inji.
Matsayin firikwensin oxygen
Domin samun babban adadin tsarkakewar iskar iskar gas da rage (CO) carbon monoxide, (HC) hydrocarbon da (NOx) abubuwan nitrogen oxide a cikin shaye-shaye, motocin EFI dole ne su yi amfani da mai kara kuzari ta hanyoyi uku.Amma don samun damar yin amfani da na'ura mai canzawa ta hanyoyi uku yadda ya kamata, dole ne a sarrafa daidaitaccen rabon iskar man ta yadda koyaushe yana kusa da ƙimar ka'idar.Galibi ana shigar da mai sauya mai katalytic tsakanin tarkacen shaye-shaye da muffler.Na'urar firikwensin iskar oxygen yana da siffa cewa ƙarfin fitarwar sa yana da canji kwatsam a cikin kusancin ka'idar iskar man fetur (14.7: 1).Ana amfani da wannan fasalin don gano yawan iskar oxygen a cikin shaye-shaye kuma a mayar da shi zuwa kwamfutar don sarrafa rabon iska da man fetur.Lokacin da ainihin rabon iskar man fetur ya zama mafi girma, yawan iskar oxygen a cikin iskar gas yana ƙaruwa kuma firikwensin iskar oxygen yana sanar da ECU yanayin durƙusa na cakuda (ƙananan ƙarfin lantarki: 0 volts).Lokacin da rabon iskar man ya yi ƙasa da ƙa'idar iskar man fetur, yawan iskar oxygen a cikin iskar gas ɗin yana raguwa, kuma ana sanar da matsayin firikwensin oxygen ga kwamfuta (ECU).
ECU tana yin hukunci ko rabon man iskar yana da ƙasa ko babba bisa bambancin ƙarfin lantarki daga firikwensin iskar oxygen, kuma yana sarrafa tsawon lokacin allurar man daidai.Koyaya, idan na'urar firikwensin oxygen ba daidai ba ne kuma ƙarfin wutar lantarki da ake fitarwa ba shi da kyau, kwamfutar (ECU) ba za ta iya sarrafa daidaitaccen adadin man iska ba.Sabili da haka, na'urar firikwensin iskar oxygen kuma na iya ramawa ga kuskuren rabon iskar man da ya haifar da lalacewa ta wasu sassa na injina da na'urar allurar lantarki.Ana iya cewa shi ne kawai firikwensin "mai wayo" a cikin tsarin EFI.
Aikin firikwensin shine tantance ko iskar oxygen da ke cikin shaye-shaye bayan konewar injin ya wuce gona da iri, wato abun da ke cikin iskar oxygen, sannan abun da ke cikin iskar oxygen ya canza zuwa siginar wutar lantarki zuwa kwamfutar injin, ta yadda injin zai gane. da rufaffiyar madauki iko tare da wuce haddi iska factor a matsayin manufa.Mai canza hanyar catalytic mai hanya uku yana da mafi girman ingancin juzu'i don gurɓataccen gurɓataccen iska guda uku na hydrocarbons (HC), carbon monoxide (CO) da nitrogen oxides (NOX) a cikin iskar iskar gas, kuma yana haɓaka juzu'i da tsarkakewa na gurɓataccen iska.
Me zai faru idan firikwensin lambda ya gaza?
Rashin na'urar firikwensin iskar oxygen da layin haɗinsa ba kawai zai haifar da hayaki mai yawa ba, har ma ya lalata yanayin aikin injin, wanda zai haifar da abin hawa don nuna alamun kamar rumfunan da ba su da aiki, rashin aikin injin, da raguwar wutar lantarki.Idan gazawa ta faru, dole ne a gyara su kuma a canza su cikin lokaci.
Ana amfani da firikwensin iskar oxygen na gaba don daidaita yawan haɗewar iskar gas, kuma firikwensin iskar oxygen na baya shine don lura da yanayin aiki na mai sauya catalytic na hanyoyi uku.Tasirin gazawar firikwensin iskar oxygen na gaba a kan motar shine yadda ba za a iya gyara cakudar ba, wanda hakan zai sa yawan man da motar ke amfani da shi ya karu da raguwa.
Sa'an nan kuma rashin iskar oxygen yana nufin cewa yanayin aiki na catalysis na hanyoyi uku ba za a iya yin hukunci ba.Da zarar catalysis na hanyoyi uku ya kasa, ba za a iya gyara shi cikin lokaci ba, wanda zai shafi yanayin aiki na injin.
A ina ake saka hannun jari a firikwensin lambda?
YASEN, a matsayin babban ƙera na'urar firikwensin mota a China, muna ba da sabis na ƙwararru da samfuran inganci tare da abokan ciniki.Idan kana sowholesale lambda firikwensin, barka da zuwa tuntube mu tasales1@yasenparts.com.
Lokacin aikawa: Nuwamba-24-2021