Iyini inzwa ye-oxygen yangaphambili yemoto
Inzwa ye-oxygen yangaphambili yemoto iyinzwa ye-oxygen efakwe phambi kwesiguquli se-catalytic esinezindlela ezintathu. Umsebenzi wayo oyinhloko ukuthola ukugcwala komoyampilo kugesi yokukhipha injini, nokuhlinzeka ngolwazi lokutholwa ku-ECU (iyunithi yokulawula i-elekthronikhi) ngendlela yamasignali kagesi. I-ECU ilawula ivolumu yomjovo kaphethiloli kuyiluphu evaliwe ngokuya ngokugxila komoyampilo egesini yokukhipha umoya ukuze ilungise isilinganiso sikaphethiloli womoya wengxube ukuze kuqinisekiswe ukuthi iseduze nenani lethiyori, ngaleyo ndlela ithuthukise ukusebenza kahle komlilo futhi yehlise ukungcoliswa komoya.
Isimiso sokusebenza senzwa ye-oxygen yangaphambili sisekelwe kumashubhu e-zirconia e-ceramic, anama-electrode e-platinum anezimbobo ezifakwe ezinhlangothini zombili. Ezingeni elithile lokushisa, ngenxa yokugxila okuhlukene komoyampilo ezinhlangothini zombili, ama-molecule omoya-mpilo ohlangothini oluphezulu lokugxila ahlangana nama-electron ku-electrode yeplatinamu ukuze akhe ama-ion omoya-mpilo, ukuze i-electrode ishajwe kahle, futhi ama-ion omoya-mpilo athuthele ohlangothini lokuhlushwa komoyampilo ophansi ngokusebenzisa i-electrolyte, ukuze i-electrode ishajwe kabi, okuholela kube khona umehluko. Uma ingxube incane, okuqukethwe kwe-oxygen ku-exhaust kuphezulu futhi umehluko ongaba khona mncane. Lapho ingxube igxilile, okuqukethwe komoyampilo emshinini wokukhipha umoya kuphansi futhi umehluko ongaba mkhulu. I-ECU ilungisa umjovo kaphethiloli ngokwalo mehluko ongaba khona wokulawula iluphu evaliwe.
Inzwa ye-oxygen yangaphambili ifakwe phambi kwesiguquli se-catalytic yezindlela ezintathu futhi ibona ikakhulukazi ukugcwala komoyampilo egesini yokukhipha injini. Uma idatha etholwe inzwa ye-oxygen yangaphambili kanye nenzwa ye-oxygen yangemuva iyafana, ingase ibonise ukuthi kunenkinga nge-three way catalytic converter, okudingeka ihlolwe futhi igcinwe.
Umsebenzi oyinhloko wenzwa ye-oxygen engaphambili yemoto ukuthola okuqukethwe komoyampilo emshinini wokuqeda injini, futhi uguqule lolu lwazi lube isignali ye-voltage ukuze idluliselwe kukhompyutha yenjini (ECU), ukuze kuqashwe ukulawulwa kwe-loop evaliwe ye-air-fuel ratio. Ngokukhethekile, inzwa yomoya-mpilo yangaphambili iqapha ukugcwala komoyampilo ekukhishweni, isiza i-ECU ukuthi ilungise umthamo womjovo kaphethiloli, igcine isilinganiso esifanelekile sikaphethiloli womoya, ithuthukise ukusebenza kahle kukaphethiloli, inciphise ukusetshenziswa kukaphethiloli, kanye nokukhishwa okuphansi kwamagesi ayingozi njenge-carbon monoxide (CO) nama-nitrogen oxides (NOx). .
Isimiso sokusebenza
Inzwa ye-oxygen yangaphambili isebenza njengebhethri, futhi ingxenye yayo eyinhloko yi-elementi ye-zirconia, esebenza emazingeni okushisa aphezulu futhi ifakwe i-platinum. Inzwa isebenzisa umehluko wokuhlushwa komoyampilo phakathi kwengaphakathi nangaphandle kwe-zirconia ukuze kukhiqizwe umehluko ongaba khona, futhi uma umehluko omkhulu wokugxilisa ingqondo, uba mkhulu umehluko ongaba khona. Ukugcwala komoyampilo kugesi ephumayo kuphansi uma kuqhathaniswa nokugcwala komoyampilo emkhathini, futhi lo mehluko wokugxilisa ingqondo udala isignali kagesi phakathi kwama-electrode. I-ECU ilungisa umjovo kaphethiloli ngokwalezi zimpawu, iqinisekisa ukuthi isilinganiso sikaphethiloli womoya wengxube siseduze nenani eliphelele lethiyori.
Indawo yokufaka
Inzwa ye-oxygen yangaphambili ivamise ukufakwa ngaphambi kwe-catalyst yezindlela ezintathu futhi isetshenziselwa ukuthola ukugcwala komoyampilo egesini yokukhipha injini. Inzwa ye-aforoxygen ifakwe ngemuva kwesiguquli se-catalytic yezindlela ezintathu ukuze kutholwe ukugxiliswa komoyampilo wegesi ephumayo ngemva kokuhlanzwa kwe-catalytic. Uma idatha yokuhlushwa komoyampilo etholwe inzwa ye-oxygen ngaphambi nangemuva ifana, ingase ibonise ukuthi isiguquli se-catalytic sezindlela ezintathu sihlulekile.
Umphumela wokwehluleka
Uma inzwa ye-oxygen yangaphambili ihluleka, ingabangela izinkinga ezifana nesivinini sokungenzi lutho esingazinzile kanye nokusetshenziswa kukaphethiloli ngokweqile. Ngenxa yokuthi i-ECU ayikwazi ukulungisa umjovo kaphethiloli ngokusekelwe kusignali elungile yokugxilisa umoya-mpilo, ukusebenza kwenjini kuyawohloka futhi ukukhishwa kwegesi kuba kubi kakhulu.
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