Yintoni inzwa ye-oxygen ngaphambili yemoto
Inzwa ye-oxygen yangaphambili yemoto yinzwa ye-oxygen efakwe phambi kwe-converter catalytic converter yeendlela ezintathu. Umsebenzi wayo oyintloko kukufumanisa i-oksijeni yoxinaniso kwi-injini yokukhupha igesi, kunye nokubonelela ngolwazi lokufumanisa kwi-ECU (iyunithi yokulawula i-electronic) ngendlela yezibonakaliso zombane. I-ECU ilawula umthamo we-injection ye-fuel kwi-loop evaliweyo ngokwe-concentration ye-oksijini kwi-exhaust gas ukulungelelanisa umlinganiselo we-air-fuel yomxube ukuze kuqinisekiswe ukuba isondele kwixabiso lethiyori, ngaloo ndlela kwandisa ukusebenza kakuhle kokutsha kunye nokunciphisa ungcoliseko lokukhutshwa.
Umgaqo osebenzayo we-sensor ye-oksijini yangaphambili isekelwe kwiityhubhu ze-ceramic zirconia, ezinee-electrode ze-platinum ezine-porous sintered kumacala omabini. Kwiqondo lobushushu elithile, ngenxa yoxinzelelo olwahlukeneyo lweoksijini kumacala omabini, iimolekyuli zeoksijini kwicala eliphezulu loxinaniso zidibana neeelectron ezikwiplatinam electrode zenze ii-ion zeoksijini, ukuze i-electrode ihlawulwe ngokufanelekileyo, kwaye ii-ion zeoksijini zifudukela kwicala loxinaniso lweoksijini ephantsi nge-electrolyte, ukuze i-electrode itshajwe kakubi, nto leyo ekhokelela kumahluko onokuthi ubekho. Xa umxube uncinci, umxholo we-oksijini kwi-exhaust uphezulu kwaye umehluko onokuthi ube mncinci. Xa umxube ugxininiswe, umxholo we-oksijini ekukhupheni uphantsi kwaye umehluko onokuthi ube mkhulu. I-ECU ihlengahlengisa inaliti yamafutha ngokwalo mahluko unokubakho kulawulo oluvaliweyo.
I-sensor ye-oxygen yangaphambili ifakwe phambi kwe-converter ye-catalytic yeendlela ezintathu kwaye ibona ngokuyinhloko i-oksijeni yoxinaniso kwi-injini yokukhupha igesi. Ukuba idatha ifunyenwe yinzwa ye-oxygen yangaphambili kunye ne-oxygen sensor yangemva iyafana, ingabonisa ukuba kukho ingxaki nge-converter ye-catalytic yeendlela ezintathu, ekufuneka ihlolwe kwaye igcinwe.
Umsebenzi ophambili wenzwa ye-oxygen yangaphambili yemoto kukubona umxholo we-oksijini kwi-exhaust ye-injini, kwaye uguqule olu lwazi lube ngumqondiso we-voltage ukuhambisa kwikhompyuter ye-injini (ECU), ukuze kuqatshelwe ulawulo oluvaliweyo lwe-air-fuel ratio. Ngokukodwa, i-sensor yangaphambili ye-oxygen ibeka iliso kwi-oxygen concentration kwi-exhaust, inceda i-ECU ilungise umthamo we-injection ye-fuel, igcine umlinganiselo ofanelekileyo we-air-fuel, ukwandisa ukusebenza kakuhle kwamafutha, ukunciphisa ukusetyenziswa kwepetroli, kunye nokukhutshwa okuphantsi kweegesi ezinobungozi ezifana ne-carbon monoxide (CO) kunye ne-nitrogen oxides (NOx). ...
Umgaqo wokusebenza
Inzwa yangaphambili ye-oksijini isebenza njengebhetri, kwaye inxalenye yayo ephambili yi-zirconia ye-element element, esebenza kumaqondo okushisa aphezulu kwaye i-catalyzed yi-platinum. I-sensor isebenzisa i-oxygen yoxinaniso umahluko phakathi kwangaphakathi nangaphandle kwe-zirconia ukuvelisa umahluko onokuthi ubekho, kwaye umlinganiselo omkhulu woxinaniso, mkhulu umahluko onokuthi ubekho. Uxinzelelo lweoksijini kwigesi yokukhupha iphantsi xa kuthelekiswa noxinzelelo lweoksijini emoyeni, kwaye lo mahluko woxinzelelo uvelisa umqondiso wombane phakathi kwee-electrode. I-ECU ilungelelanisa i-injection ye-fuel ngokwezi zibonakaliso, iqinisekisa ukuba umlinganiselo we-air-fuel yomxube usondele kwixabiso elifanelekileyo lethiyori.
Indawo yokufakela
Inzwa yangaphambili ye-oxygen ivame ukufakwa phambi kwe-catalyst yeendlela ezintathu kwaye isetyenziselwa ukufumanisa i-oxygen concentration kwi-injini yokukhupha igesi. I-sensor ye-afteroxygen ifakwe emva kwe-converter ye-catalytic yeendlela ezintathu ukuze ibone ukuxinwa kwe-oksijini ye-exhaust gas emva kokucocwa kwe-catalytic. Ukuba idatha yoxinaniso lwe-oksijeni efunyenwe yinzwa ye-oxygen ngaphambi nangemva kwayo iyafana, ingabonisa ukuba i-converter ye-catalytic yeendlela ezintathu ayiphumelelanga.
Isiphumo sokusilela
Ukuba isivamvo se-oksijini yangaphambili ayiphumeleli, inokubangela iingxaki ezifana nesantya esingazinzanga sokungenzi nto kunye nokusetyenziswa kwepetroli ngokugqithisileyo. Ngenxa yokuba i-ECU ayikwazi ukunyenyisa inaliti yamafutha ngokusekwe kuphawu oluchanekileyo loxinaniso lweoksijini, ukusebenza kwe-injini kuyawohloka kwaye ukukhutshwa kwezinto kuya kuba mandundu.
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