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 ehambelanayo ngomgaqo wolungelelwaniso lwekhemikhali, ukubeka iliso nokulawula umlinganiselo wokutsha we-air-fuel eziko, ukuqinisekisa umgangatho wemveliso kunye nemigangatho yokukhupha izinto zokulinganisa, ezisetyenziswa ngokubanzi kuzo zonke iintlobo zokutsha kwamalahle, ukutsha kweoli, ukutsha kwegesi kunye nolunye ulawulo lwesithando somlilo.
I-sensor ye-oksijeni isetyenziselwa ukulawula nge-elektroniki inkqubo yokulawula impendulo yesixhobo sokutofa i-fuel ukuqaphela i-oxygen concentration kwi-exhaust gas kunye nobuninzi be-air-fuel ratio, ukubeka iliso kwi-theory-fuel ratio (14.7: 1) ukutsha kwi-injini, kunye nokuthumela imiqondiso yengxelo kwikhompyuter.
Umgaqo wokusebenza
Inzwa ye-oxygen isebenza ngokufanayo kwibhetri, kunye ne-element zirconia kwi-sensor esebenza njenge-electrolyte. Umgaqo osisiseko wokusebenza ngulo: phantsi kweemeko ezithile (ubushushu obuphezulu kunye neplatinum catalysis), umahluko woxinaniso lweoksijini phakathi kwangaphakathi nangaphandle kweHao oxide isetyenziselwa ukuvelisa umahluko onokubakho, kwaye okukhona umahluko omkhulu woxinaniso, kokukhona umahluko onokubakho. . Umxholo we-oksijini emoyeni ngu-21%, igesi yokukhupha emva kokutshisa okugxininiswe ngokwenene ayinayo i-oksijeni, kwaye igesi yokukhupha eyenziwa emva kokutshiswa komxube we-dilute okanye igesi yokukhupha eyenziwa ngenxa yokungabikho komlilo iqulethe i-oksijeni eninzi, kodwa isengaphantsi kakhulu kuneoksijini esemoyeni.
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 yokulawula i-electronic usebenzisa i-zirconia ye-oxygen sensor ayikwazi ukulawula umlinganiselo we-air-fuel wenyani kufuphi nomlinganiselo wethiyori we-air-fuel xa imeko yokusebenza kwe-injini iyancipha, ngelixa i-titanium dioxide sensor ye-oksijini inokulawula umlinganiselo wenene we-air-fuel kufuphi nethiyori. Umlinganiselo we-air-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 kwe-injini kunye nokukhupha ungcoliseko, kwaye injini iya kubonakala isantya esingazinzanga sokungenzi nto, ukunqongophala komlilo, utyando kunye nezinye impazamo. 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. Ngokubanzi, i-silica eveliswa emva kokutshiswa kweekhompawundi ze-silicon eziqulethwe kwipetroli kunye ne-oyile yokuthambisa, kunye negesi ye-silicone ekhutshwe ngokungafanelekanga kwe-silicone i-rubber yokutywina i-gaskets iya kwenza i-oxygen sensor iphumelele, ngoko ke kufuneka kusetyenziswe i-fuel esemgangathweni kunye ne-oyile yokuthambisa. .
Xa kulungiswa, kuyimfuneko ukuba ukhethe ngokufanelekileyo kwaye ufake i-gaskets ye-rubber, musa ukusebenzisa i-solvents kunye ne-anti-stick agents ngaphandle kwezo zichazwe ngumenzi kwi-sensor, njl. inzwa ye-oxygen, okanye ioli okanye uthuli kunye nezinye i-sediments zingeniswa ngaphakathi kwe-oxygen sensor, eya kuthintela okanye ivimbele umoya wangaphandle ngaphakathi kwe-oxygen sensor, ukwenzela ukuba isibonakaliso sokuphuma kwe-oxygen sensor siphume ngokulungelelanisa. 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 yesivamvo se-oxygen, iplagi yokubopha ye-oxygen sensor kufuneka ikhutshwe, kwaye ucingo olucekethekileyo kufuneka lutsalwe kwi-terminal ephumayo ye-voltage yengxelo ye-oxygen sensor ngokomzobo wesekethe yemodeli, kwaye emva koko kufakwe iplagi 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.
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Zhuo Meng Shanghai Auto Co., Ltd.uzibophelele ekuthengiseni iintsimbi ze-MG&MAUXS zamkelekileukuthenga.
