Na'urar da ke canzawa ita ce mafi mahimmancin na'urar tsarkakewa ta waje da aka sanya a cikin tsarin shaye-shaye, wanda zai iya canza iskar gas mai cutarwa kamar CO, HC da NOx daga iskar gas zuwa carbon dioxide mara lahani, ruwa da nitrogen ta hanyar oxidation da raguwa.Lokacin da high-zazzabi wutsiya gas wuce ta cikin tsarkakewa naúrar, da tsarkakewa wakili a cikin mai kara kuzari zai bunkasa ayyukan CO, HC da NOx da kuma inganta su don aiwatar da wani hadawan abu da iskar shaka rage sinadaran dauki, a cikin abin da CO ne oxidized zuwa colorless kuma. iskar carbon dioxide mara guba a babban zafin jiki;HC mahadi suna oxidized zuwa ruwa (H20) da carbon dioxide a high yanayin zafi;An rage NOx zuwa nitrogen da oxygen.Gas uku masu cutarwa sun zama iskar gas mara lahani, ta yadda za a iya tsarkake iskar wutsiya.

Bangaren mai ɗaukar hoto shine yanki na yumbu mai ƙyalli, wanda aka shigar a cikin bututun shayewa na musamman.Ana kiran shi mai ɗaukar kaya saboda baya shiga cikin halayen catalytic, amma an rufe shi da platinum, rhodium, palladium da sauran karafa masu daraja.Zai iya canza HC da CO a cikin iskar gas zuwa ruwa da CO2, kuma yana lalata NOx zuwa nitrogen da oxygen.HC da CO gas ne masu guba.Yawan shan iska zai haifar da mutuwa, yayin da NOX zai haifar da hayaki na photochemical kai tsaye.

Ƙarƙashin yanayin aiki na yau da kullun na mai canza catalytic, saboda yawan yawan zafin da ake samu ta hanyar iskar shaka, ana iya tantance aikin mai canza catalytic ta hanyar kwatanta yanayin zafi.Zazzabi mai fita na catalytic Converter ya zama aƙalla 10 ~ 15% sama da zafin shiga.Ga mafi yawan al'ada catalytic converters, kanti zafin jiki na catalytic Converter zai zama 20 ~ 25% sama da mashigai zafin jiki.

Saƙar zuma karfe substrate mai kara kuzari yana da abũbuwan amfãni daga cikin sauri kona, kananan girma, high inji ƙarfi, shahararren zafi-juriya, da dai sauransu An yadu amfani a babura da abin hawa (man fetur engine da dizal engine) shaye tsarin.Za mu iya saduwa da ma'aunin fitarwa na Yuro II, Yuro III, Yuro IV, Yuro V, EPA da CARB.