Iyini inzwa ye-oxygen engaphambili emotweni
Inzwa ye-oxygen yangaphambili yemoto iyinzwa ye-oxygen efakwe phambi kwe-catalytic converter enezindlela ezintathu. Umsebenzi wayo oyinhloko ukuthola ukuhlushwa kwe-oxygen kugesi yokukhipha injini, nokunikeza ulwazi lokuthola ku-ECU (iyunithi yokulawula kagesi) ngesimo sezimpawu zikagesi. I-ECU ilawula ivolumu yokufaka uphethiloli ngendlela evaliwe ngokwezinga le-oxygen kugesi yokukhipha ukuze ilungise isilinganiso somoya-fuel sengxube ukuqinisekisa ukuthi iseduze nenani elicatshangelwayo, ngaleyo ndlela ithuthukise ukusebenza kahle kokushisa futhi inciphise ukungcola kokukhishwa .
Umgomo wokusebenza wenzwa ye-oxygen yangaphambili usekelwe kumashubhu e-ceramic e-zirconia, anama-electrode e-platinum anezimbobo acwebezelisiwe nhlangothi zombili. Ezingeni lokushisa elithile, ngenxa yokuhlushwa kwe-oxygen okuhlukene nhlangothi zombili, ama-molecule e-oxygen ohlangothini lokuhlushwa okuphezulu ahlangana nama-electron ku-electrode ye-platinum ukuze akhe ama-ion e-oxygen, ukuze i-electrode ishajwe kahle, futhi ama-ion e-oxygen athuthela ohlangothini lokuhlushwa kwe-oxygen okuphansi nge-electrolyte, ukuze i-electrode ishajwe kabi, okuholela emehluko ongaba khona. Uma ingxube incane, okuqukethwe kwe-oxygen emhubheni kuphezulu futhi umehluko ongaba khona mncane. Uma ingxube igxilile, okuqukethwe kwe-oxygen emhubheni kuphansi futhi umehluko ongaba khona mkhulu. I-ECU ilungisa ukujova kukaphethiloli ngokuya ngalo mehluko ongaba khona wokulawula i-closed-loop .
Inzwa ye-oxygen yangaphambili ifakwe phambi kwe-catalytic converter enezindlela ezintathu futhi ibona kakhulu ukugcwala kwe-oxygen kugesi yokukhipha injini. Uma idatha etholwe yi-oxygen sensor yangaphambili kanye ne-oxygen sensor yangemuva ifana, kungabonisa ukuthi kunenkinga nge-catalytic converter enezindlela ezintathu, okudingeka ihlolwe futhi igcinwe .
Umsebenzi oyinhloko wenzwa ye-oxygen yangaphambili yemoto ukuthola okuqukethwe kwe-oxygen ku-exhaust yenjini, nokuguqula lolu lwazi lube yisignali ye-voltage ukuze idluliselwe kukhompyutha yenjini (ECU), ukuze kufezwe ukulawulwa kwe-closed-loop kwesilinganiso somoya-fuel . Ngokukhethekile, inzwa ye-oxygen yangaphambili iqapha ukugcwala kwe-oxygen ku-exhaust, isiza i-ECU ukulungisa ivolumu yokufaka uphethiloli, igcine isilinganiso somoya-fuel esifanele, ithuthukise ukusebenza kahle kukaphethiloli, inciphise ukusetshenziswa kukaphethiloli, kanye nokunciphisa ukukhishwa kwamagesi ayingozi njenge-carbon monoxide (CO) kanye ne-nitrogen oxides (NOx).
Isimiso sokusebenza
Inzwa ye-oxygen yangaphambili isebenza njengebhethri, futhi ingxenye yayo eyinhloko yi-element zirconia, esebenza emazingeni okushisa aphezulu futhi iqhutshwa yi-platinum. Inzwa isebenzisa umehluko wokuhlushwa kwe-oxygen phakathi kwangaphakathi nangaphandle kwe-zirconia ukukhiqiza umehluko ongaba khona, futhi uma umehluko wokuhlushwa umkhulu, kulapho umehluko ongaba khona umkhulu khona. Ukuhlushwa kwe-oxygen kugesi yokukhipha umoya kuphansi uma kuqhathaniswa nokuhlushwa kwe-oxygen emkhathini, futhi lo mehluko wokuhlushwa ukhiqiza isignali ye-voltage phakathi kwama-electrode. I-ECU ilungisa ukujova kukaphethiloli ngokwalezi zimpawu, iqinisekisa ukuthi isilinganiso somoya-kaphethiloli senhlanganisela siseduze nenani elifanele kakhulu.
Indawo yokufaka
Inzwa ye-oxygen yangaphambili ivame ukufakwa ngaphambi kwe-catalyst enezindlela ezintathu futhi isetshenziselwa ukuthola ukuhlushwa kwe-oxygen kugesi yokukhipha injini. Inzwa ye-afteroxygen ifakwe ngemuva kwe-catalytic converter enezindlela ezintathu ukuze ithole ukuhlushwa kwe-oxygen yegesi yokukhipha ngemva kokuhlanzwa kwe-catalytic. Uma idatha yokuhlushwa kwe-oxygen etholwe yinzwa ye-oxygen ngaphambi nangemva kwayo ifana, kungase kubonise ukuthi i-catalytic converter enezindlela ezintathu yehlulekile.
Umphumela wokwehluleka
Uma inzwa ye-oxygen yangaphambili ihluleka, ingabangela izinkinga ezifana nesivinini esingazinzile sokusebenza kanye nokusetshenziswa kukaphethiloli ngokweqile. Ngenxa yokuthi i-ECU ayikwazi ukulungisa ukujova kukaphethiloli ngokusekelwe esignalini efanele yokuhlushwa kwe-oxygen, ukusebenza kwenjini kuyawohloka futhi ukukhishwa komoya ongcolile kuyawohloka.
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