Yintoni ephambi kwesixhobo sokuvavanya ioksijini yemoto
Phambi kwesensor ye-oksijini yemoto kukho isiguquli se-catalytic esineendlela ezintathu . Isiguquli se-catalytic esineendlela ezintathu sibekwe emva kwesisensor ye-oksijini, kwaye umsebenzi waso ophambili kukunciphisa umxholo wongcoliseko kwigesi yokukhupha umoya kunye nokukhusela okusingqongileyo .
Indima kunye nesikhundla se-catalytic converter eneendlela ezintathu
I-catalytic converter eneendlela ezintathu ifakelwa emva kwe-oxygen sensor kwaye idla ngokuba ngasemva kwenkqubo yokukhupha umoya. Indima yayo ephambili kukunciphisa izinto ezinobungozi kwiigesi zokukhupha umoya, ezifana ne-carbon monoxide, ii-hydrocarbons kunye ne-nitrogen oxides, ngaloo ndlela kunciphisa impembelelo yokukhupha umoya kwindalo esingqongileyo.
Umsebenzi kunye nendawo ye-sensor ye-oxygen
Izinzwa zeoksijini zahlulwe zaba zi-sensor yeoksijini yangaphambili kunye ne-sensor yeoksijini yangasemva:
I-sensor ye-oxygen yangaphambili: ifakwe phambi kwe-catalyst eneendlela ezintathu, idla ngokuba ngasemva kwe-exhaust manifold. Indima yayo ephambili kukubona umxholo we-oxygen kwi-exhaust kunye nokubuyisela isignali kwi-ECU ukunceda ukulungisa umlinganiselo womoya-fuel wenjini ukuze ihlale kwixabiso elifanelekileyo (14.7:1).
I-sensor ye-oxygen yangasemva: ifakwe emva kwe-converter ye-catalytic eneendlela ezintathu. Indima yayo ephambili kukufumanisa ukwakheka kwegesi yomsila emva kokunyangwa kwe-converter ye-catalytic eneendlela ezintathu, kwaye ibuyisele isignali kwi-ECU ukunceda ukujonga ukuba ukusebenza kwe-converter ye-catalytic eneendlela ezintathu kuqhelekile na.
Iingcebiso zokugcinwa nokutshintshwa
Zombini izinzwa zeoksijini kunye neziguquli zekhatalytic zifuna ukuhlolwa nokugcinwa rhoqo. Ukusetyenziswa kwexesha elide kwezinzwa zeoksijini kunokubangela ubuthi belothe okanye ukuqokelelwa kwekhabhoni, okubangela ukusebenza okuphantsi. Ukuba ufumana ukonyuka kokusetyenziswa kwepetroli, amandla aphantsi kunye nezinye izinto, kunokuba luphawu lomonakalo kwinzwa yeoksijini.
Kucetyiswa ukuba ujonge i-oxygen sensor rhoqo emva kweekhilomitha ezili-100,000 okanye ngaphezulu kwaye uyitshintshe ukuba kuyimfuneko ukuze ugcine ukusebenza kakuhle kwesithuthi kunye nokunciphisa ungcoliseko lomoya ongcolileyo.
Umsebenzi ophambili we-sensor ye-oksijini engaphambili yemoto kukujonga umxholo we-oksijini kwigesi yokukhupha umoya emva kokutsha kwenjini, kwaye uyiguqule ibe yisignali yombane ukuze idluliselwe kwiyunithi yolawulo lwenjini (ECU), ukuze kufezekiswe ulawulo oluvaliweyo kunye nokwandisa umlinganiselo womxube, ukuze kuphuculwe ukusebenza kakuhle kokutsha kwenjini kunye nomgangatho wokukhupha umoya.
Ngokukodwa, i-sensor ye-oxygen yangaphambili ifakwe kwi-exhaust manifold kwaye imisebenzi yayo ephambili ibandakanya:
Ukubeka iliso kumxholo weoksijini: I-sensor yeoksijini engaphambili ibona umxholo weoksijini kwigesi yokukhupha umoya ngokufumanisa ukuba kukho ioksijini engaphezulu kwigesi yokukhupha umoya emva kokutsha kwenjini. Umxholo ophezulu weoksijini uthetha ukuba umxube ubhityile, ngelixa umxholo ophantsi weoksijini uthetha ukuba umxube unamandla kakhulu.
Ulawulo lwempendulo: ngokwemixholo eyahlukeneyo yeoksijini, isenzi seoksijini esingaphambili sithumela isignali yombane ehambelanayo kwi-ECU, ukuze i-ECU ikwazi ukulungisa i-fuel injection ngokwe-excessive air factor, ifikelele kulawulo oluvaliweyo, kwaye iqinisekise ukuba injini isoloko ikwimeko yokusebenza efanelekileyo.
Ukuphucula ukusebenza kakuhle kokutsha: Ngokulawula ngokuchanekileyo umlinganiselo womxube, isenzi se-pre-oxygen sinokuqinisekisa ukuba i-catalytic converter eneendlela ezintathu inamandla okuguqula aphezulu njengee-hydrocarbons, i-carbon monoxide kunye ne-nitrogen oxides kwigesi yokukhupha umoya, ukuze kucocwe ukungcola komoya kakhulu.
Ukunciphisa ukusetyenziswa kwepetroli kunye nokukhutshwa kwegesi: Imeko yokusebenza kwesensor yeoksijini engaphambili ichaphazela ngokuthe ngqo ukonga amafutha enjini kunye nomgangatho wokukhutshwa kwegesi. Ukuba isensor yeoksijini engaphambili iyasilela okanye idatha ayichanekanga, inokukhokelela ekusetyenzisweni kwepetroli okwandisiweyo, ukwehla kwamandla, igesi yokukhupha egesi kakhulu kunye nezinye iingxaki.
Ukongeza, isenzi se-oksijini engaphambili sikwanceda ukuqinisekisa ukusebenza okuqhelekileyo kwesiguquli se-catalytic esineendlela ezintathu ukuze kuthintelwe umonakalo ngenxa yomlinganiselo ongafanelekanga womxube. Ukuba isenzi se-oksijini engaphambili sinempazamo, kuyacetyiswa ukuba kusetyenziswe isixhobo sobuchwephesha sokuxilonga ukufumanisa unobangela wempazamo ethile, endaweni yokutshintsha isenzi ngokuthe ngqo, ukuze kuthintelwe iindleko ezingeyomfuneko.
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