Feem ntau, engineering logic ntawm roj tawm tswv yim tswj qhov system txiav txim siab tias cov pa sensor nyob ze rau lub combustion chamber, thiab qhov siab dua qhov tseeb ntawm cov roj tswj yog, uas yog txiav txim siab los ntawm cov yam ntxwv ntawm cov pa cua ntws, xws li cov pa ceev, Qhov ntev ntawm cov channel (cov pa roj yog dhau lawm tom qab instantaneously) thiab lub sij hawm teb ntawm lub sensor, thiab lwm yam. Muaj ntau manufacturers nruab ib tug oxygen sensor nyob rau hauv txhua lub tso pa manifold ntawm txhua lub tog raj kheej, thiaj li hais tias nws muaj peev xwm txiav txim seb lub tog raj kheej muaj teeb meem, uas. tshem tawm qhov ua tau ntawm kev kuaj mob yuam kev, thiab ntau zaus txo lub sijhawm kuaj mob los ntawm kev tshem tawm tsawg kawg yog ib nrab ntawm cov thooj voos kheej kheej uas muaj teeb meem. Ib qho kev hloov pauv catalytic nrog dual oxygen sensor thiab cov roj tawm tswv yim tswj qhov system uas ib txwm tswj cov roj faib hluav taws xob tuaj yeem ua kom muaj kev nyab xeeb tshaj plaws ntawm cov khoom siv hluav taws xob tso rau hauv cov pa roj carbon oxide thiab dej vapor. Txawm li cas los xij, lub catalytic converter yuav raug puas tsuaj vim overheating (vim tsis zoo ignition, thiab lwm yam), uas yuav ua rau kom txo tau ntawm catalyst nto thiab sintering ntawm orifice hlau, ob qho tib si uas yuav ua rau lub catalytic converter mus tas li.

Thaum cov catalyst tsis ua haujlwm, peb tuaj yeem paub tias cov kws tshaj lij tseem ceeb heev hauv kev kho ib puag ncig thiab tso pa tawm.

Cov tsos mob ntawm OBD-II kev kuaj mob ua rau cov kev soj ntsuam ntawm on-board thiab OBD-II kev soj ntsuam qhov system ntawm ib puag ncig thiab catalyst kom paub tseeb txhais tau tias raws li cov yam ntxwv oxidation ntawm zoo lossis phem catalysts. Hauv kev ua haujlwm ruaj khov, lub teeb liab hloov pauv ntawm cov pa oxygen zoo (kub) qab lub catalyst yuav tsum tsawg dua li ntawm cov pa oxygen sensor nyob rau hauv pem hauv ntej ntawm lub catalyst, vim hais tias cov catalyst nquag siv oxidation muaj peev xwm thaum hloov cov hydrocarbons thiab carbon monoxide, uas. txo cov teeb liab hloov pauv ntawm cov pa oxygen sensor tom qab.