Yintoni i-sensor ye-oxygen engaphambili yemoto
I-sensor ye-oxygen yangaphambili yemoto yi-sensor ye-oxygen efakwe phambi kwe-catalytic converter eneendlela ezintathu. Umsebenzi wayo ophambili kukubona uxinzelelo lwe-oxygen kwi-exhaust gas ye-injini, kunye nokubonelela ngolwazi lokufumanisa kwi-ECU (iyunithi yolawulo lwe-elektroniki) ngendlela yemiqondiso yombane. I-ECU ilawula umthamo we-fuel injection kwi-closed loop ngokwe-oxygen concentration kwi-exhaust gas ukuze ilungelelanise umlinganiselo womoya-fuel womxube ukuqinisekisa ukuba usondele kwixabiso lethiyori, ngaloo ndlela iphucula ukusebenza kakuhle komlilo kwaye inciphise ungcoliseko lokukhupha .
Umgaqo wokusebenza we-sensor ye-oksijini engaphambili usekelwe kwiityhubhu ze-ceramic ze-zirconia, ezinee-electrode zeplatinum ezinemingxuma ezingcoliswe kumacala omabini. Kwiqondo lobushushu elithile, ngenxa yoxinzelelo lwe-oksijini oluhlukeneyo kumacala omabini, iimolekyuli ze-oksijini kwicala loxinzelelo oluphezulu zidibana nee-electron kwi-electrode yeplatinum ukwenza ii-ion ze-oksijini, ukuze i-electrode itshajwe kakuhle, kwaye ii-ion ze-oksijini zifudukele kwicala loxinzelelo lwe-oksijini oluphantsi nge-electrolyte, ukuze i-electrode itshajwe kakubi, nto leyo ebangela umahluko onokubakho. Xa umxube uncinci, umxholo we-oksijini kwi-exhaust uphezulu kwaye umahluko onokubakho umncinci. Xa umxube uxinene, umxholo we-oksijini kwi-exhaust uphantsi kwaye umahluko onokubakho mkhulu. I-ECU ilungisa i-fuel injection ngokweli mahluko onokubakho wolawulo lwe-closed-loop .
I-sensor ye-oksijini engaphambili ifakwe phambi kwe-catalytic converter eneendlela ezintathu kwaye ikakhulu ibona ukuxinana kwe-oksijini kwigesi yokukhupha umoya kwinjini. Ukuba idatha efunyenwe yi-sensor ye-oksijini engaphambili kunye ne-oxygen sensor engasemva ziyafana, oko kunokubonisa ukuba kukho ingxaki kwi-catalytic converter eneendlela ezintathu, ekufuneka ihlolwe kwaye igcinwe .
Umsebenzi ophambili we-sensor ye-oksijini engaphambili yemoto kukubona umxholo we-oksijini kwi-exhaust yenjini, kunye nokuguqula olu lwazi lube yisignali ye-voltage ukuze idluliselwe kwikhompyutha yenjini (ECU), ukuze kufezekiswe ulawulo oluvaliweyo lomlinganiselo we-air-fuel . Ngokukodwa, i-sensor ye-oksijini engaphambili ijonga uxinzelelo lwe-oksijini kwi-exhaust, inceda i-ECU ukuba ilungise umthamo we-fuel injection, igcine umlinganiselo ofanelekileyo we-air-fuel, iphucule ukusebenza kakuhle kwe-fuel, inciphise ukusetyenziswa kwe-fuel, kwaye inciphise ukukhutshwa kwe-carbon monoxide (CO) kunye ne-nitrogen oxides (NOx).
Umgaqo wokusebenza
I-sensor ye-oksijini engaphambili isebenza njengebhetri, kwaye icandelo layo eliphambili yi-element zirconia, esebenza kumaqondo obushushu aphezulu kwaye iqhutywa yiplatinum. I-sensor isebenzisa umahluko woxinzelelo lwe-oksijini phakathi kwangaphakathi nangaphandle kwe-zirconia ukuvelisa umahluko onokubakho, kwaye okukhona umahluko omkhulu woxinzelelo, kokukhona umahluko onokubakho umkhulu. Uxinzelelo lwe-oksijini kwigesi yokukhupha umoya luphantsi xa kuthelekiswa noxinzelelo lwe-oksijini emoyeni, kwaye lo mahluko woxinzelelo uvelisa isignali ye-voltage phakathi kwee-electrodes. I-ECU ilungisa i-fuel injection ngokwezi signals, iqinisekisa ukuba umlinganiselo womoya-fuel womxube usondele kwixabiso elifanelekileyo lethiyori.
Indawo yokufakela
I-sensor ye-oxygen yangaphambili idla ngokufakelwa ngaphambi kwe-catalyst eneendlela ezintathu kwaye isetyenziselwa ukubona uxinzelelo lwe-oxygen kwi-exhaust gas yenjini. I-sensor ye-afteroxygen ifakwe emva kwe-catalytic converter eneendlela ezintathu ukuze ibone uxinzelelo lwe-oxygen kwi-exhaust gas emva kokucocwa kwe-catalytic. Ukuba idatha yoxinzelelo lwe-oxygen efunyenwe yi-sensor ye-oxygen ngaphambi nasemva kwayo iyafana, inokubonisa ukuba i-catalytic converter eneendlela ezintathu ayiphumelelanga.
Isiphumo sokusilela
Ukuba isenzi se-oksijini engaphambili siyasilela, sinokubangela iingxaki ezifana nesantya esingazinziyo sokungaqhubi kakuhle kunye nokusetyenziswa kakhulu kwepetroli. Ngenxa yokuba i-ECU ayikwazi ukulungisa ukufakwa kwepetroli ngokusekelwe kwisignali efanelekileyo yoxinzelelo lwe-oxygen, ukusebenza kwenjini kuyawohloka kwaye ukukhutshwa komoya kuyawohloka.
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