Yini ephambi kwenzwa ye-oxygen yemoto
Ngaphambi kwenzwa ye-oxygen yemoto kukhona i-catalytic converter enezindlela ezintathu . I-catalytic converter enezindlela ezintathu itholakala ngemuva kwenzwa ye-oxygen, futhi umsebenzi wayo oyinhloko ukunciphisa okuqukethwe ukungcola kugesi yokukhipha umoya nokuvikela indawo ezungezile .
Indima kanye nesikhundla se-catalytic converter enezindlela ezintathu
I-catalytic converter enezindlela ezintathu ifakwa ngemuva kwenzwa ye-oxygen futhi ivame ukutholakala ngemuva kwesistimu yokukhipha umoya. Indima yayo eyinhloko ukunciphisa izinto eziyingozi kumagesi okukhipha umoya, njenge-carbon monoxide, ama-hydrocarbon kanye nama-nitrogen oxide, ngaleyo ndlela kuncishiswe umthelela wokukhishwa komoya emoyeni.
Umsebenzi kanye nendawo yenzwa ye-oxygen
Izinzwa ze-oxygen zihlukaniswe zibe yinzwa ye-oxygen yangaphambili kanye nenzwa ye-oxygen yangemuva:
Inzwa ye-oxygen yangaphambili: ifakwe ngaphambi kwe-catalyst enezindlela ezintathu, ngokuvamile ngemuva kwe-exhaust manifold. Indima yayo eyinhloko ukuthola okuqukethwe kwe-oxygen ku-exhaust bese ibuyisela isignali ku-ECU ukusiza ukulungisa isilinganiso somoya-fuel senjini ukuze ihlale inenani elifanele (14.7:1).
Inzwa ye-oxygen yangemuva: ifakwe ngemuva kwe-catalytic converter enezindlela ezintathu. Indima yayo eyinhloko ukuthola ukwakheka kwegesi yomsila ngemuva kokwelashwa kwe-catalytic converter enezindlela ezintathu, bese ibuyisela isignali ku-ECU ukusiza ukuqapha ukuthi ukusebenza kwe-catalytic converter enezindlela ezintathu kuyinto evamile yini.
Iziphakamiso zokulungisa nokufaka esikhundleni
Kokubili izinzwa ze-oxygen kanye neziguquli ze-catalytic zidinga ukuhlolwa nokugcinwa njalo. Ukusetshenziswa isikhathi eside kwezinzwa ze-oxygen kungabangela ubuthi be-lead noma ukuqongelela kwe-carbon, okuholela ekusebenzeni okunciphile. Uma uthola ukwanda kokusetshenziswa kukaphethiloli, amandla anciphile kanye nezinye izinto, kungaba uphawu lomonakalo ku-oxygen sensor .
Kunconywa ukuhlola inzwa ye-oxygen njalo ngamakhilomitha ayi-100,000 noma ngaphezulu bese uyishintsha uma kudingeka ukuze ugcine ukusebenza kahle kwemoto nokunciphisa ukungcola komoya ongcolile.
Umsebenzi oyinhloko wenzwa ye-oxygen yangaphambili yemoto ukuqapha okuqukethwe kwe-oxygen kugesi yokukhipha umoya ngemva kokusha kwenjini, bese uyiguqula ibe yisignali kagesi ukuze idluliselwe kuyunithi yokulawula injini (i-ECU), ukuze kufezwe ukulawula okuvaliwe nokwandisa isilinganiso sengxube, ukuze kuthuthukiswe ukusebenza kahle kokusha kwenjini kanye nekhwalithi yokukhishwa komoya.
Ngokukhethekile, inzwa ye-oxygen yangaphambili ifakwe ku-exhaust manifold futhi imisebenzi yayo eyinhloko ifaka:
Ukuqapha okuqukethwe komoya-mpilo: Inzwa yomoya-mpilo engaphambili ithola okuqukethwe komoya-mpilo kugesi yokukhipha umoya ngokunquma ukuthi kukhona yini umoya-mpilo owengeziwe kugesi yokukhipha umoya ngemva kokusha kwenjini. Okuqukethwe komoya-mpilo ophezulu kusho ukuthi ingxube incane, kanti okuqukethwe komoya-mpilo ophansi kusho ukuthi ingxube inamandla kakhulu.
Ukulawulwa kwempendulo: ngokuya ngokuqukethwe okuhlukile komoya-mpilo, inzwa ye-oxygen yangaphambili idlulisela isignali kagesi ehambisanayo ku-ECU, ukuze i-ECU ikwazi ukulungisa ukujova kukaphethiloli ngokuya nge-air factor eyeqile, ifinyelele ukulawulwa kwe-closed-loop, futhi iqinisekise ukuthi injini ihlala isesimweni esihle kakhulu sokusebenza.
Thuthukisa ukusebenza kahle kokushisa: Ngokulawula ngokunembile isilinganiso sengxube, inzwa yangaphambi komoya-mpilo ingaqinisekisa ukuthi i-catalytic converter enezindlela ezintathu inamandla okuguqula aphezulu ama-hydrocarbon, i-carbon monoxide kanye nama-nitrogen oxides kugesi yokukhipha umoya, ukuze kuhlanzwe ukungcola komoya ngezinga elikhulu.
Nciphisa ukusetshenziswa kukaphethiloli kanye nokukhishwa kwegesi: Isimo sokusebenza senzwa ye-oxygen yangaphambili sithinta ngqo ukonga kukaphethiloli wenjini kanye nekhwalithi yokukhishwa kwegesi. Uma inzwa ye-oxygen yangaphambili yehluleka noma idatha inganembile, kungaholela ekusetshenzisweni kukaphethiloli okwandisiwe, ukwehla kwamandla, igesi yokukhipha ngokweqile kanye nezinye izinkinga.
Ngaphezu kwalokho, inzwa yomoya-mpilo yangaphambili iyasiza futhi ukuqinisekisa ukusebenza okuvamile kwe-catalytic converter enezindlela ezintathu ukuze kugwenywe umonakalo ngenxa yesilinganiso esingalungile sengxube. Uma inzwa yomoya-mpilo yangaphambili inephutha, kunconywa ukusebenzisa ithuluzi lokuxilonga lochwepheshe ukuthola imbangela ethile yephutha, kunokufaka esikhundleni senzwa ngqo, ukuze kugwenywe izindleko ezingadingekile .
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