Chii chinonzi sensor ye okisijeni yemotokari
Sensor ye okisijeni yepamberi pemotokari i sensor yeokisijeni yakaiswa pamberi pechinoshandura simba chemagetsi chetatu-nzira. Basa rayo guru nderekuona huwandu hweokisijeni mugasi rinobuda muinjini, uye kupa ruzivo rwekuona kuECU (electronic control unit) muchimiro chezviratidzo zvemagetsi. ECU inodzora huwandu hwemafuta anoiswa muchikamu chakavharwa zvichienderana nehuwandu hweokisijeni mugasi rinobuda muinjini kuti igadzirise chiyero chemhepo-mafuta emusanganiswa kuti ive nechokwadi chekuti iri pedyo nepfungwa, nokudaro ichivandudza kushanda zvakanaka kwekupisa uye kuderedza kusvibiswa kwemhepo.
Pfungwa yekushanda kwe sensor ye oxygen yekumberi yakavakirwa pamachubhu e zirconia ceramic, ane ma electrode e platinum ane porous akanyungudutswa kumativi ese. Patembiricha yakati, nekuda kwekusiyana kwe oxygen complexes kumativi ese, mamorekuru eokisijeni ari kudivi re high concentration anobatana nema electron ari ku platinum electrode kuti agadzire ma oxygen ions, kuitira kuti electrode ive positive charge, uye ma oxygen ions anotama kuenda kudivi re low oxygen concentration kuburikidza ne electrolyte, kuitira kuti electrode ive negative charge, zvichikonzera mutsauko we potential. Kana musanganiswa wacho watetepa, oxygen content iri mu exhaust yakakwira uye potential difference iri diki. Kana musanganiswa wacho wakanyanya, oxygen content iri mu exhaust yakadzikira uye potential difference yakakura. ECU inogadzirisa fuel injection zvichienderana ne potential difference iyi ye closed-loop control .
Sensor ye okisijeni yekumberi yakaiswa pamberi pechinoshandura tambo chemagetsi chetatu-nzira uye inonyanya kuona huwandu hweokisijeni mugasi remhepo rinobuda muinjini. Kana data rakawanikwa nesensor ye okisijeni yekumberi nesensor ye okisijeni yekumashure zvakafanana, zvinogona kuratidza kuti pane dambudziko nesensor yemagetsi chetatu-nzira, iyo inoda kuongororwa nekuchengetedzwa .
Basa guru remota front oxygen sensor nderekuona huwandu hweokisijeni mu exhaust yeinjini, uye kushandura ruzivo urwu kuita voltage signal kuti itumirwe kuenjini computer (ECU), kuitira kuti ione kudzora kwe air-fuel ratio . Kunyanya, front oxygen sensor inotarisa huwandu hweokisijeni mu exhaust, ichibatsira ECU kugadzirisa huwandu hwe fuel injection, kuchengetedza air-fuel ratio yakakwana, kugadzirisa mashandiro emafuta, kuderedza kushandiswa kwemafuta, uye kuderedza kuburitswa kwemagasi anokuvadza akadai se carbon monoxide (CO) uye nitrogen oxides (NOx).
Musimboti wekushanda
Sensor ye okisijeni yekumberi inoshanda sebhatiri, uye chikamu chayo chikuru i element zirconia, iyo inoshanda pakupisa kwakanyanya uye inokonzereswa neplatinum. Sensor inoshandisa musiyano we oxygen concentration pakati pemukati nekunze kwe zirconia kuti igadzire musiyano we potential, uye musiyano we centration wakakura, musiyano we potential wakakura. Kuwanda kwe oxygen mu exhaust gas kwakaderera zvichienzaniswa nehuwandu hwe oxygen mumhepo, uye musiyano uyu we centration unogadzira voltage signal pakati pe electrodes. ECU inogadzirisa fuel injection zvichienderana nezviratidzo izvi, ichiva nechokwadi chekuti air-fuel ratio yemusanganiswa iri pedyo ne theoretical optimal value.
Nzvimbo yekuiswa
Sensor ye okisijeni yekumberi inowanzoiswa pamberi pe catalyst yenzira nhatu uye inoshandiswa kuona huwandu hwe okisijeni mugasi re exhaust reinjini. Sensor ye afteroxygen inoiswa kumashure kwe three-way catalytic converter kuti ione huwandu hwe okisijeni mugasi re exhaust mushure mekucheneswa kwe catalytic. Kana data re oxygen concentration rakawanikwa ne oxygen sensor isati yasvika uye yapera rakafanana, zvinogona kuratidza kuti three-way catalytic converter yakundikana.
Mhedzisiro yekukundikana
Kana sensor ye okisijeni yekumberi ikakundikana, zvinogona kukonzera matambudziko akadai sekumhanya kusina kugadzikana uye kushandiswa kwemafuta zvakanyanya. Nekuti ECU haikwanise kugadzirisa kupinza mafuta zvichibva pachiratidzo chakakodzera chekuwanda kweokisijeni, mashandiro einjini anoderera uye utsi hunobuda hunowedzera kuipa.
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