Ibyuma bitwara ibyuma bifata ibyuma bifite ibyiza byo gucana vuba, ubunini buto, imbaraga nyinshi hamwe no kurwanya ubushyuhe bwiza. Icyuma kibyimbye nicyo gikoreshwa cyane mugusukura moto. Yateguwe hejuru yikintu gitwara ibyuma byinshi, kandi hashyirwaho urwego rwinzibacyuho hagati yicyuma gitwikiriye ifuro hamwe nigitambaro gikora kugirango gikemure kwaguka kwumuriro uhuza buhoro buhoro hagati yicyuma nigitambaro gikora, kandi urwego rwinzibacyuho rushyizweho. hamwe na Ce Ikozwe muburyo bukomeye bwibintu bidasanzwe byisi nka La, Pr, nibindi, hanyuma bigashyirwa mubintu bikora birimo ibyuma byagaciro nka Pt na Rh. Ubuso bwubwikorezi buvurwa kugirango habeho urwego rwinzibacyuho, kandi gukomera gukomeye ni byiza; ikoreshwa ryibikoresho birwanya ubushyuhe bwinshi hamwe nubuso burebure, catalizator ifite imikorere myiza yo kurwanya ubushyuhe bwo hejuru; ikigereranyo cyibyuma byagaciro nibintu bidasanzwe byisi birashimangirwa, kandi ubushyuhe bwumucyo wa catalizator ni buke; ububiko-buke bwo kubika Oxygene yibikoresho, uburyo bwo kweza cyane bwa catalitike ihindura; ibikoresho byo gutwikira byikora bikwiranye nicyuma cyikimamara, uburinganire bwiza; igihe kirekire cyo gukora ibyuma bya catalitiki ihindura: ibinyabiziga bya lisansi birashobora kugera kuri kilometero zirenga 80.000; kugenzura neza no kugenzura ubuziranenge, ubuziranenge bwibicuruzwa burahagaze; formulaire hamwe nibiciro bitandukanye irahari, kandi ibyuka bihumanya bigera kurwego mugihe urebye ubukungu.

Ibyiza byibyuma bifata ifumbire mvaruganda:
1. Icyuma cya fumu gifite ibiranga ibyuma, bishobora guhindurwa no kwihanganira ihungabana, biteza imbere cyane ubuzima bwumurimo wa catalitike yinzira eshatu zihindura gaze ya moteri na moto.
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3. Imiterere yihariye-itatu-inyuze mu mwobo wububiko bwibyuma ifite ubuso bunini bwimbere imbere mubunini bwingingo hamwe ningaruka nziza yo kuyungurura.