Inzwa yeoksijini yemoto.
Inzwa ye-oksijini yemoto yeyona nto iphambili kwinzwa yempendulo kwinkqubo yolawulo lwe-injini ye-EFI, kwaye yeyona nto iphambili ekulawuleni ukukhutshwa kombhobho wemoto, ukunciphisa ungcoliseko lwemoto kunye nokuphucula umgangatho wokutsha kwamafutha enjini yemoto.
Kukho iintlobo ezimbini zezivamvo zeoksijini, i-zirconia kunye ne-titanium dioxide.
Isivamvo seoksijini kukusetyenziswa kwezinto ezinovakalelo lwe-ceramic ukulinganisa amandla eoksijini kwiindawo ezahlukeneyo zokufudumeza okanye imibhobho yokukhupha, ukubala ugxininiso lweoksijini oluhambelanayo ngomgaqo wolungelelwaniso lwekhemikhali, ukujonga nokulawula umlinganiselo wokutsha komoya-mafutha eziko, ukuqinisekisa umgangatho wemveliso kunye nemigangatho yokukhupha izinto zokulinganisa, isetyenziswa ngokubanzi kuzo zonke iintlobo zokutsha, enye i-oil combus combus kunye ne-oil combus combus. ulawulo lwe-atmosphere yesithando somlilo.
I-sensor ye-oxygen isetyenziselwa ukulawula nge-elektroniki inkqubo yokulawula impendulo yesixhobo se-injection ye-fuel ukuqaphela i-oxygen concentration kwi-exhaust gas kunye noxinaniso lwe-air-fuel ratio, ukubeka iliso kwi-theory ye-air-fuel ratio (14.7: 1) ukutsha kwi-injini, kunye nokuthumela izibonakaliso zempendulo kwikhompyutheni.
Umgaqo wokusebenza
Inzwa ye-oxygen isebenza ngokufanayo kwibhetri, kunye ne-element zirconia kwi-sensor esebenza njenge-electrolyte. Umgaqo osisiseko wokusebenza kukuba: phantsi kweemeko ezithile (ubushushu obuphezulu kunye ne-platinum catalysis), umahluko woxinaniso lwe-oksijini phakathi kwangaphakathi nangaphandle kwe-Hao oxide isetyenziselwa ukuvelisa ulwahlulo olunokubakho, kwaye ubukhulu becala umehluko wokuxininisa, mkhulu umahluko onokubakho. Umxholo we-oksijini emoyeni yi-21%, igesi yokukhupha emva kokuvutha okugxininiswe ngokwenene ayinayo i-oksijeni, kwaye igesi yokukhupha eyenziwa emva kokutshiswa komxube we-dilute okanye i-exhaust gas eyenziwa kukungabikho komlilo iqulethe i-oksijini eninzi, kodwa ingaphantsi kakhulu kune-oksijini emoyeni.
Ngaphantsi kwe-catalysis yobushushu obuphezulu kunye neplatinum, i-oksijini eqhotyoshelwe kwi-sensor ye-oxygen idliwe, ngoko ke umahluko we-voltage uveliswa, i-voltage ephumayo yomxube ogxininisiweyo isondele kwi-1V, kwaye umxube we-dilute usondele kwi-0V. Ngokuhambelana nomqondiso we-voltage ye-oxygen sensor, umlinganiselo we-air-fuel ulawulwa ukuhlengahlengisa ububanzi be-injection ye-fuel pulse, ngoko ke ulawulo lwe-elektroniki lwenzwa ye-oksijini yinzwa ephambili ye-fuel metering. I-sensor ye-oksijeni inokubonakaliswa ngokupheleleyo kwiqondo lokushisa eliphezulu (isiphelo sifikelela ngaphezu kwe-300 ° C) kwaye sinokukhupha i-voltage. Iphendula ngokukhawuleza kakhulu kwiinguqu kumxube malunga ne-800 ° C.
Iingcebiso
I-zirconium dioxide i-oxygen sensor ibonisa ukuguqulwa koxinzelelo lomxube ovuthayo ngokuguqulwa kombane, kunye ne-titanium dioxide i-oxygen sensor ibonisa utshintsho lomxube ovuthayo ngokutshintsha ukuchasana. Inkqubo yolawulo yombane esebenzisa isivamvo seoksijini ye-zirconia ayikwazi ukulawula umlinganiselo wokoqobo wamafutha omoya kufutshane nomlinganiselo wethiyori wamafutha omoya xa imeko yokusebenza kwe-injini iwonakala, ngelixa isivamvo seoksijini ye-titanium dioxide inokulawula umlinganiselo wenene wamafutha omoya kufuphi nomlinganiselo wethiyori womoya-fuel xa imeko yokusebenza kwe-injini ihla.
Umthamo we-injection (ububanzi be-injection pulse) ehlengahlengiswa yiyunithi yokulawula ngexesha elifutshane ngokwe-oxygen sensor signal ibizwa ngokuba yi-short-term fuel correction, elawulwa yi-voltage ephumayo ye-oxygen sensor.
Ukulungiswa kwamafutha exesha elide lixabiso eligqitywe yiyunithi yokulawula ukuguqulwa kweyunithi yokulawula yesakhiwo sedatha yokusebenza ngokuhambelana nokutshintshwa kwe-coefficient yokulungiswa kwexesha elifutshane.
Impazamo eqhelekileyo
Nje ukuba i-sensor ye-oksijini isilele, ikhompyuter yenkqubo yokutofa kwe-elektroniki ayinakukwazi ukufumana ulwazi lokuxinana kweoksijini kumbhobho wokukhupha, ngenxa yoko ayinakukwazi ukulawula ubungakanani bamafutha omoya, oya kwandisa ukusetyenziswa kwamafutha e-injini kunye nongcoliseko lomoya, kwaye injini iya kubonakala isantya sokungazinzi, ukungabikho komlilo, utyando kunye nezinye izinto ezigwenxa. Ngoko ke, isiphoso kufuneka sisuswe okanye sitshintshwe ngexesha elifanelekileyo [1].
Iphoso yetyhefu
Ityhefu ye-oxygen sensor yinto eqhelekileyo kwaye inzima ukukhusela ukusilela, ngakumbi ukusetyenziswa rhoqo kweemoto zepetroli ezikhokelayo, kunye nenzwa entsha ye-oxygen, inokusebenza kuphela amawaka ambalwa eekhilomitha. Ukuba yityhefu encinci yelothe, ngoko ukusebenzisa itanki yepetroli engenalothe inokuphelisa ukukhokela kumphezulu wenzwa yeoksijini kwaye ibuyisele ekusebenzeni okuqhelekileyo. Nangona kunjalo, ngokufuthi ngenxa yobushushu obuphezulu bokuphuma, ilothe ingena ngaphakathi kwayo, ithintela ukusasazwa kweeyoni zeoksijini, isenza inzwa yeoksijini ingasebenzi, ngelo xesha inokutshintshwa kuphela.
Ukongeza, ityhefu ye-silicon yeenzwa zeoksijini ikwayinto eqhelekileyo. Ngokuqhelekileyo, i-silica eveliswa emva kokutshiswa kwe-silicon compounds equlethwe kwi-petroli kunye ne-oyile yokuthambisa, kunye negesi ye-silicone ekhutshwe ngokungafanelekanga kwe-silicone i-rubber yokutywina i-gaskets iya kwenza i-sensor ye-oksijini ingaphumeleli, ngoko ke kufuneka kusetyenziswe i-fuel esemgangathweni kunye neoli yokuthambisa.
Xa kulungiswa, kuyimfuneko ukukhetha ngokuchanekileyo kwaye ufake i-gaskets yerabha, ungasebenzisi izinyibilikisi kunye ne-anti-stick agents ngaphandle kwezo zichazwe ngumvelisi kwi-sensor, njl. I-ECU ayikwazi ukulungisa umlinganiselo we-air-fuel ngexesha. Ukuveliswa kweediphozithi zekhabhoni kubonakaliswa ikakhulu njengokunyuka kokusetyenziswa kwepetroli kunye nokunyuka okubonakalayo kokugxininiswa kokukhutshwa. Ngeli xesha, ukuba i-sediment isusiwe, iya kubuyela kumsebenzi oqhelekileyo.
Ukuqhekeka kweCeramic
I-ceramic ye-oxygen sensor inzima kwaye i-brittle, kwaye ukunkqonkqoza ngezinto eziqinileyo okanye ukuvuthela ngomoya oqinileyo kunokukwenza ukuba iqhube kwaye ingaphumeleli. Ngoko ke, kuyimfuneko ukuba uqaphele ngakumbi xa ujongene neengxaki kwaye uzitshintshe ngexesha.
Ucingo lwebhloko luyatshiswa
Ucingo lokumelana nesifudumezi lutshiswe lwacima. Kwi-sensor ye-oksijeni efudumeleyo, ukuba ucingo lokumelana nokushisa lutshiswa, kunzima ukwenza inzwa ifikelele kwiqondo lokushisa eliqhelekileyo lokusebenza kwaye ilahlekelwe ngumsebenzi wayo.
Uqhawulo lomgca
Isiphaluka sangaphakathi se-oxygen sensor sinqanyuliwe.
Indlela yokuhlola
Ukukhangela ukuxhathisa i-heater
Susa iplagi ye-oxygen sensor harness, kwaye usebenzise i-multimeter ukulinganisa ukuchasana phakathi kwepali yokufudumala kunye nentsimbi yentsimbi kwi-terminal sensor ye-oxygen. Ixabiso lokuchasana yi-4-40Ω(jonga imiyalelo yemodeli ethile). Ukuba ayihambisani nomgangatho, buyisela inzwa ye-oxygen.
Umlinganiselo wombane wengxelo
Xa ulinganisa umbane wengxelo yenzwa ye-oxygen, iplagi yokubopha ye-oxygen sensor kufuneka ikhutshwe, kwaye ucingo oluncinci kufuneka lutsalwe kwi-terminal ephumayo ye-voltage ye-feedback ye-sensor ye-oxygen ngokomzobo wesekethe yemodeli, kwaye emva koko iplagwe kwiplagi yokubopha. Umbane wengxelo unokulinganiswa ukusuka kumgca okhokelayo ngexesha lokusebenza kwe-injini (ezinye iimodeli zinokulinganisa umbane wengxelo yesivamvo se-oksijini ukusuka kwisokethi yokufumanisa impazamo). Ngokomzekelo, uluhlu lweemoto eziveliswe yiToyota Motor Company zinokulinganisa i-voltage yempendulo ye-oxygen sensor ngokuthe ngqo kwi-OX1 okanye i-OX2 i-terminals kwi-socket yokufumanisa impazamo).
Xa ulinganisa i-voltage yempendulo ye-oxygen sensor, kukulungele ukusebenzisa i-multimeter yohlobo lwe-pointer kunye noluhlu oluphantsi (ngokuqhelekileyo i-2V) kunye ne-impedance ephezulu (ukuchasana kwangaphakathi okukhulu kune-10MΩ). Iindlela zokubona ezikhethekileyo zezi zilandelayo:
1. Vula i-injini eshushu kwiqondo lokushisa eliqhelekileyo lokusebenza (okanye usebenze kwi-2500r / min emva kokuqalisa i-2min);
2. Qhagamshela ipeni engalunganga ye-multimeter voltage stop kwi-E1 okanye i-electrode engalunganga yebhetri kwisokhethi yokukhangela impazamo, kunye nepeni ekhangayo kwi-OX1 okanye i-OX2 jack kwi-socket yokufumanisa impazamo, okanye kwinombolo | kwiplagi yokubopha iintambo zenzwa yeoksijini.
I-3, vumela i-injini iqhubeke isebenza ngesantya esimalunga ne-2500r / min, kwaye ukhangele ukuba isalathisi se-voltmeter sinokujikeleza emva naphambili phakathi kwe-0-1V, kwaye urekhode inani le-voltmeter pointer swings ngaphakathi kwe-10s. Ngaphantsi kweemeko eziqhelekileyo, kunye nenkqubela phambili yokulawulwa kweempendulo, i-voltage ye-feedback ye-oxygen sensor iya kutshintsha rhoqo ngasentla nangaphantsi kwe-0.45V, kwaye i-voltage ye-feedback kufuneka itshintshe ngamaxesha angaphantsi kwe-8 ngaphakathi kwe-10.
Ukuba kungaphantsi kwamaxesha e-8, kuthetha ukuba i-sensor ye-oxygen okanye inkqubo yokulawula impendulo ayisebenzi ngokufanelekileyo, enokuthi ibangelwe kukuqokelelwa kwekhabhoni ebusweni be-oxygen sensor, ukwenzela ukuba ukuvakalelwa kuncitshiswe. Kule njongo, injini kufuneka iqhutywe kwi-2500r / min malunga nemizuzu engama-2 ukususa idiphozithi yekhabhoni ebusweni be-sensor ye-oxygen, kwaye emva koko uhlolisise i-voltage yempendulo. Ukuba isalathisi se-voltmeter sisatshintsha ngokukhawuleza emva kokuba ikhabhoni isuswe, ibonisa ukuba i-sensor ye-oxygen yonakalisiwe, okanye isiphaluka sokulawula ingxelo yekhompyutheni iphosakele.
I-4, ukuhlolwa kombala kwenzwa ye-oxygen
Susa inzwa ye-oksijini kumbhobho wokukhupha kwaye ukhangele ukuba i-vent hole kwi-sensor yendlu ivaliwe kwaye i-corecemic core yonakalisiwe. Ukuba yonakele, buyisela inzwa ye-oxygen.
Iimpazamo zinokumiselwa ngokujonga umbala wenxalenye ephezulu yenzwa ye-oxygen:
I-1, ukukhanya okungwevu okuphezulu: lo ngumbala oqhelekileyo wenzwa ye-oxygen;
I-2, i-white top: ebangelwa ukungcola kwe-silicon, inzwa ye-oksijini kufuneka itshintshwe ngeli xesha;
I-3, i-brown top (njengoko kuboniswe kwi-Figure 1) : okubangelwa ukungcola okukhokelela, ukuba kunzulu, kufuneka kwakhona kuthathe indawo ye-oxygen sensor;
(4) Umphezulu omnyama: obangelwa yi-carbon deposition, emva kokuphelisa impazamo ye-carbon deposition ye-injini, i-carbon deposition kwi-sensor ye-oksijini inokususwa ngokubanzi ngokuzenzekelayo.
Ukuba ufuna ukwazi ngakumbi, qhubeka ufunda amanye amanqaku kule ndawo!
Nceda usibize ukuba ufuna iimveliso ezinjalo.
Zhuo Meng Shanghai Auto Co., Ltd.uzibophelele ekuthengiseni iintsimbi ze-MG&MAUXS zamkelekileukuthenga.
