Ngokubanzi, ingqiqo yobunjineli yenkqubo yokulawula impendulo yepetroli imisela ukuba inzwa yeoksijini ikufuphi negumbi lokutsha, kwaye okukhona kuphezulu ukuchaneka kolawulo lwamafutha, okumiselwa ikakhulu ziimpawu zokuphuma komoya, njengesantya segesi, ubude bejelo (igesi ishiywe kakhulu ngasemva ngokukhawuleza) kunye nexesha lokuphendula lenzwa, njl. njl. Abavelisi abaninzi bafaka inzwa ye-oksijini phantsi kobuninzi bokukhutshwa kwe-cylinder nganye, ukwenzela ukuba ikwazi ukugqiba ukuba yeyiphi i-cylinder enengxaki, leyo. kuphelisa ukwenzeka kwempazamo yokuxilongwa, kwaye kwiimeko ezininzi kunciphisa ixesha lokuxilongwa ngokususa ubuncinane isiqingatha seesilinda ezinokuba yingxaki. Isiguquli esiqhelekileyo se-catalytic esine-sensor ye-oksijini emibini kunye nenkqubo yokulawula impendulo ye-fuel ehlala ilawula inkqubo yokusasazwa kwamafutha inokuqinisekisa ukuguqulwa okukhuselekileyo kwezinto ezinobungozi zokukhupha kwi-carbon oxide engenabungozi kunye nomphunga wamanzi. Nangona kunjalo, i-converter ye-catalytic iya konakala ngenxa yokushisa (ngenxa yokutshisa okungahambi kakuhle, njl.), Okuya kukhokelela ekunciphiseni i-catalyst surface kunye ne-sintering ye-orifice metal, zombini eziya kuphazamisa ngokusisigxina i-catalytic converter.

Xa i-catalyst ingaphumeleli, siyakwazi ukuba amagcisa abaluleke kakhulu ekulungiseni indawo kunye nenkqubo yokukhupha.

Ukubonakala kwenkqubo yokuxilongwa kwe-OBD-II yenza inkqubo yokubeka iliso ebhodini kunye ne-OBD-II inkqubo yokubeka iliso yendawo kunye ne-catalyst ukufumanisa ngokuchanekileyo kuthetha ngokweempawu ze-oxidation zezinto ezilungileyo okanye ezimbi. Ekusebenzeni okuzinzileyo, ukuguquguquka kwesignali ye-oxygen sensor (eshushu) emva kwe-catalyst kufuneka ibe ngaphantsi kunayo nayiphi na inzwa ye-oksijini phambi kwe-catalyst, kuba i-catalyst esebenza ngokuqhelekileyo isebenzisa umthamo we-oxidation xa uguqula i-hydrocarbons kunye ne-carbon monoxide, enokuthi isebenze. kunciphisa ukuguquguquka komqondiso we-post-oxygen sensor.