Inzwa ye-oksijini yemoto.
I-sensor ye-oksijini yemoto yeyona sensor iphambili yempendulo kwinkqubo yolawulo lwe-EFI injini, kwaye yinxalenye ebalulekileyo yokulawula ukukhutshwa komoya ophuma kwiimoto, ukunciphisa ungcoliseko lokusingqongileyo kweemoto kunye nokuphucula umgangatho wokutsha kwamafutha kwiinjini zeemoto.
Kukho iintlobo ezimbini zeenzwa ze-oxygen, i-zirconia kunye ne-titanium dioxide.
I-oksijini sensor kukusetyenziswa kwezinto ezibuthathaka ze-ceramic ukulinganisa amandla eoksijini kwii-oven ezahlukeneyo zokufudumeza okanye iipayipi zokukhupha umoya, ukubala uxinzelelo lweoksijini oluhambelanayo ngomgaqo wokulinganisela iikhemikhali, ukujonga nokulawula umlinganiselo womoya-fuel wokutsha kwi-oven, ukuqinisekisa umgangatho wemveliso kunye nemigangatho yokukhupha umoya wezinto zokulinganisa, ezisetyenziswa kakhulu kuzo zonke iintlobo zokutsha kwamalahle, ukutsha kweoyile, ukutsha kwegesi kunye nezinye iindlela zokulawula umoya we-oven.
I-oxygen sensor isetyenziselwa ukulawula ngekhompyutha inkqubo yolawulo lwempendulo yesixhobo sokujova ipetroli ukuze kubonwe uxinano lweoksijini kwigesi yokukhupha umoya kunye noxinano lomlinganiselo womoya-fuel, ukujonga umlinganiselo womoya-fuel (14.7:1) otshisa injini, kunye nokuthumela imiqondiso yempendulo kwikhompyutha.
Umgaqo wokusebenza
I-oxygen sensor isebenza ngendlela efanayo nebhetri, apho i-element zirconia kwi-sensor isebenza njenge-electrolyte. Umgaqo osisiseko wokusebenza ngulo: phantsi kweemeko ezithile (ubushushu obuphezulu kunye ne-platinum catalysis), umahluko woxinzelelo lwe-oxygen phakathi kwangaphakathi nangaphandle kwe-Hao oxide usetyenziselwa ukuvelisa umahluko onokubakho, kwaye okukhona umahluko omkhulu woxinzelelo, kokukhona umahluko onokubakho umkhulu. Umxholo we-oxygen emoyeni yi-21%, i-exhaust gas emva kokutsha okuxineneyo ayinayo i-oxygen, kwaye i-exhaust gas eveliswa emva kokutsha komxube onyibilikisiweyo okanye i-exhaust gas eveliswa kukungabikho komlilo ine-oxygen engaphezulu, kodwa isencinci kakhulu kune-oxygen ekwi-atmosphere.
Phantsi kwe-catalysis yobushushu obuphezulu kunye neplatinum, i-oksijini eqhotyoshelwe kwi-sensor ye-oksijini iyasetyenziswa, ngoko ke umahluko we-voltage uyavela, i-voltage yokukhupha yomxube oxineneyo isondele kwi-1V, kwaye umxube we-dilute usondele kwi-0V. Ngokwesignali ye-voltage ye-sensor ye-oksijini, umlinganiselo we-air-fuel ulawulwa ukuze ulungelelanise ububanzi be-pulse ye-injection fuel, ngoko ke ulawulo lwe-elektroniki lwe-sensor ye-oksijini yeyona sensor iphambili yokulinganisa amafutha. I-sensor ye-oksijini inokuchazwa ngokupheleleyo kuphela kumaqondo obushushu aphezulu (isiphelo sifikelela ngaphezu kwe-300 ° C) kwaye i-voltage ikhuphe. Iphendula ngokukhawuleza kakhulu kutshintsho kumxube malunga ne-800 ° C.
Iingcebiso
I-zirconium dioxide oxygen sensor ibonisa utshintsho loxinzelelo lomxube otshayo ngokutshintsha kwe-voltage, kwaye i-titanium dioxide oxygen sensor ibonisa utshintsho lomxube otshayo ngokutshintsha kokumelana. Inkqubo yolawulo lwe-elektroniki esebenzisa i-zirconia oxygen sensor ayinakulawula umlinganiselo womoya-fuel kufutshane nomlinganiselo womoya-fuel wethiyori xa imeko yokusebenza kwenjini yonakala, ngelixa i-titanium dioxide oxygen sensor inokulawula umlinganiselo womoya-fuel kufutshane nomlinganiselo womoya-fuel wethiyori xa imeko yokusebenza kwenjini yonakala.
Umthamo we-injection (ububanzi be-injection pulse) ohlengahlengiswa yiyunithi yolawulo ngexesha elifutshane ngokwesignali ye-oxygen sensor ubizwa ngokuba yi-short-term fuel correction, elawulwa yi-output voltage ye-oxygen sensor.
Ukulungiswa kwepetroli yexesha elide lixabiso elimiselwa kukuguqulwa kwesakhiwo sedatha yokusebenza yeyunithi yolawulo ngokwenguqu ye-coefficient yokulungiswa kwepetroli yexesha elifutshane.
Impazamo eqhelekileyo
Xa i-sensor yeoksijini ingaphumeleli, ikhompyutha yenkqubo yokufaka amafutha e-elektroniki ayinakufumana ulwazi loxinzelelo lweoksijini kumbhobho wokukhupha umoya, ngoko ke ayinakulawula impendulo yomlinganiselo womoya-mafutha, nto leyo eya kunyusa ukusetyenziswa kwepetroli yenjini kunye nongcoliseko lokukhupha umoya, kwaye injini iya kubonakala isantya esingazinzanga sokungaqhubi kakuhle, ukungabikho komlilo, ukunyuka komoya kunye nezinye iziganeko zempazamo. Ke ngoko, impazamo kufuneka isuswe okanye itshintshwe ngexesha elifanelekileyo [1].
Isiphoso setyhefu
Ukutyhefa nge-oxygen sensor kuyinto eqhelekileyo kwaye kunzima ukuyithintela, ingakumbi ukusetyenziswa rhoqo kweemoto zepetroli ezine-lead, kwane-oxygen sensor entsha, inokusebenza kuphela kwiikhilomitha ezimbalwa. Ukuba yi-lead poison encinci, ukusebenzisa itanki yepetroli engenalo i-lead kunokususa i-lead kumphezulu we-oxygen sensor kwaye kuyibuyisele ekusebenzeni okuqhelekileyo. Nangona kunjalo, rhoqo ngenxa yobushushu obuphezulu bokukhupha umoya, i-lead ingena ngaphakathi kwayo, ithintela ukusasazeka kwee-ion ze-oxygen, okwenza i-oxygen sensor ingasebenzi, ngelo xesha inokutshintshwa kuphela.
Ukongeza, ityhefu ye-silicon ye-oxygen sensors nayo yinto eqhelekileyo. Ngokubanzi, i-silica eveliswa emva kokutsha kwee-silicon compounds ezikwipetroli nakwi-oyile yokuthambisa, kunye negesi ye-silicone ekhutshwa kukusetyenziswa okungafanelekanga kwee-silicone rubber sealing gaskets ziya kwenza i-oxygen sensor ingasebenzi, ngoko ke kufuneka kusetyenziswe i-fuel kunye ne-lubricating oil esemgangathweni.
Xa kulungiswa, kuyimfuneko ukukhetha nokufaka ii-gasket zerabha ngokuchanekileyo, ungafaki izinyibilikisi kunye nee-anti-stick agents ngaphandle kwezo zichazwe ngumvelisi kwi-sensor, njl. Ngenxa yokutsha kakubi kwenjini, iidiphozithi zekhabhoni zenziwa phezu komphezulu we-sensor ye-oksijini, okanye ioyile okanye uthuli kunye nezinye iidiphozithi zifakwa ngaphakathi kwi-sensor ye-oksijini, eziya kuthintela okanye zivale umoya wangaphandle ungene ngaphakathi kwe-sensor ye-oksijini, ukuze isignali yokukhupha ye-sensor ye-oksijini ingahambelani. I-ECU ayinakulungisa umlinganiselo womoya-mafutha ngexesha. Ukuveliswa kweediphozithi zekhabhoni kubonakala kakhulu njengokwanda kokusetyenziswa kwepetroli kunye nokwanda okukhulu koxinzelelo lokukhupha. Ngeli xesha, ukuba idiphozithi isusiwe, iya kubuyela emsebenzini oqhelekileyo.
Ukuqhekeka kweseramikhi
I-ceramic ye-oxygen sensor iqinile kwaye iyaphuka, kwaye ukungqubana nezinto eziqinileyo okanye ukuvuthela ngomoya onamandla kunokubangela ukuba iqhekeke kwaye ingaphumeleli. Ke ngoko, kufuneka ulumke ngakumbi xa ujongene neengxaki kwaye uzitshintshe ngexesha.
Ucingo lwebhloko lutshisiwe
Intambo yokumelana ne-heater iyatsha. Kwi-sensor ye-oxygen eshushu, ukuba intambo yokumelana ne-heater iyatsha, kunzima ukwenza i-sensor ifikelele kubushushu obuqhelekileyo bokusebenza ize ilahlekelwe ngumsebenzi wayo.
Ukuqhawulwa komgca
Isekethe yangaphakathi ye-sensor ye-oksijini ayisebenzi.
Indlela yokuhlola
Ukujonga ukumelana neheater
Susa iplagi ye-harness ye-oxygen sensor, kwaye usebenzise i-multimeter ukulinganisa ukumelana phakathi kwe-heater pole kunye ne-iron pole kwi-terminal ye-oxygen sensor. Ixabiso lokuxhathisa yi-4-40Ω (jonga imiyalelo yemodeli ethile). Ukuba ayifikeleli kumgangatho, tshintsha i-oxygen sensor.
Ukulinganiswa kwevolthi yempendulo
Xa kulinganiswa i-voltage yempendulo ye-sensor ye-oksijini, iplagi ye-harness ye-sensor ye-oksijini kufuneka ikhutshwe, kwaye kufuneka kutsalwe intambo encinci kwi-terminal ye-output ye-voltage yempendulo ye-sensor ye-oksijini ngokwe-diagram yesekethe yemodeli, ize ixhunywe kwi-plug ye-harness. I-voltage yempendulo ingalinganiswa ukusuka kumgca we-lead ngexesha lokusebenza kwenjini (ezinye iimodeli zinokulinganisa i-voltage yempendulo ye-sensor ye-oksijini ukusuka kwi-socket yokufumanisa iimpazamo). Umzekelo, uthotho lweemoto eziveliswe yiToyota Motor Company zinokulinganisa i-voltage yempendulo ye-sensor ye-oksijini ngokuthe ngqo ukusuka kwi-terminals ze-OX1 okanye ze-OX2 kwi-socket yokufumanisa iimpazamo).
Xa ulinganisa i-feedback voltage ye-oxygen sensor, kungcono ukusebenzisa i-multimeter yohlobo lwe-pointer enoluhlu oluphantsi (ngesiqhelo i-2V) kunye ne-impedance ephezulu (ukuxhathisa kwangaphakathi okungaphezulu kwe-10MΩ). Iindlela ezithile zokufumanisa zezi zilandelayo:
1. Jika injini ishushu iye kubushushu obuqhelekileyo bokusebenza (okanye isebenze kwi-2500r/min emva kokuqalisa imizuzu emi-2);
2. Qhagamshela ipeni engalunganga ye-multimeter voltage stop kwi-E1 okanye kwi-electrode engalunganga yebhetri kwi-socket yokufumanisa iimpazamo, kunye nepeni echanekileyo kwi-jack ye-OX1 okanye ye-OX2 kwi-socket yokufumanisa iimpazamo, okanye kwinombolo | ekwiplagi ye-wiring harness ye-oxygen sensor.
3, vumela injini iqhubeke isebenza ngesantya esingama-2500r/min, kwaye ujonge ukuba i-voltmeter pointer ingajika ibuyele umva na phakathi kwe-0-1V, kwaye urekhode inani le-voltmeter pointer swings ngaphakathi kwe-10s. Kwiimeko eziqhelekileyo, ngenkqubela phambili yolawulo lwempendulo, i-feedback voltage ye-oxygen sensor iya kutshintsha rhoqo ngaphezulu nangaphantsi kwe-0.45V, kwaye i-feedback voltage kufuneka itshintshe ubuncinane amaxesha asi-8 ngaphakathi kwe-10s.
Ukuba ingaphantsi kwezihlandlo ezisi-8, oko kuthetha ukuba i-sensor ye-oksijini okanye inkqubo yokulawula impendulo ayisebenzi kakuhle, nto leyo enokubangelwa kukuqokelelwa kwekhabhoni kumphezulu we-sensor ye-oksijini, ukuze uvakalelo lunciphe. Ngenxa yesi sizathu, injini kufuneka isebenze kwi-2500r/min malunga nemizuzu emi-2 ukususa iidiphozithi zekhabhoni kumphezulu we-sensor ye-oksijini, uze ujonge i-voltage yempendulo. Ukuba i-pointer ye-voltmeter isatshintsha kancinci emva kokuba ikhabhoni isusiwe, oko kuthetha ukuba i-sensor ye-oksijini yonakele, okanye isekethe yokulawula impendulo yekhompyutha inempazamo.
4, ukuhlolwa kombala wembonakalo ye-oxygen sensor
Susa i-oxygen sensor kwi-exhaust pipe uze ujonge ukuba umngxuma womoya okwi-sensor housing uvaliwe na kwaye i-ceramic core yonakele. Ukuba yonakele, tshintsha i-oxygen sensor.
Iimpazamo zinokufunyanwa ngokujonga umbala wenxalenye ephezulu ye-oxygen sensor:
1, umbala ongwevu okhanyayo phezulu: lo ngumbala oqhelekileyo we-sensor ye-oksijini;
2, umphezulu omhlophe: obangelwa kukungcola kwe-silicon, kufuneka kutshintshwe i-oxygen sensor ngeli xesha;
3, umphezulu omdaka (njengoko kubonisiwe kuMfanekiso 1): okubangelwa lungcoliseko lwelothe, ukuba lubi kakhulu, kufuneka luthathe indawo ye-oxygen sensor;
(4) Ingaphezulu emnyama: ebangelwa kukufakwa kwekhabhoni, emva kokususa impazamo yokufakwa kwekhabhoni kwinjini, ukufakwa kwekhabhoni kwi-sensor yeoksijini ngokubanzi kunokususwa ngokuzenzekelayo.
Ukuba ufuna ukwazi okungakumbi, qhubeka ufunda amanye amanqaku kule sayithi!
Nceda usitsalele umnxeba ukuba ufuna iimveliso ezinjalo.
Zhuo Meng Shanghai Auto Co., Ltd.izimisele ukuthengisa iinxalenye zeemoto zeMG&MAUXS zamkelekileukuthenga.
