Catalyst control
Kuwunika kwa kuchuluka kwa kuvala kwa chothandizira, chodziwika bwino kuti chosinthira chothandizira, chomwe chimapangidwa nthawi zonse ndi njira yodziwira matenda omwe ali pa bolodi, kumayang'ana kusintha kwa mpweya wa okosijeni mumipweya yotulutsa isanayambe kapena itatha chothandizira.
Pachifukwa ichi, zizindikiro zotumizidwa ndi masensa a oxygen (omwe amadziwikanso kuti lambda sensors) amagwiritsidwa ntchito. Imodzi mwa masensa imayikidwa patsogolo pake 
chothandizira ndi chachiwiri kumbuyo. Kusiyana kwa zizindikiro ndi chifukwa chakuti ena mwa mpweya mu mpweya wotulutsa mpweya umagwidwa ndi chothandizira ndipo motero mpweya wa okosijeni mu mpweya wotulutsa mpweya uli pansi pa chothandizira. Mphamvu ya okosijeni ya chothandiziracho imatchedwa mphamvu ya okosijeni. Zimachepa pamene chothandizira chimavala, zomwe zimapangitsa kuti chiwerengero cha okosijeni chiwonjezeke mu mpweya wotulutsa mpweya wotuluka. Dongosolo loyang'ana pa bolodi limawunika mphamvu ya okosijeni ya chothandizira ndikuigwiritsa ntchito kuti idziwe momwe imathandizira.
Sensa ya okosijeni yomwe imayikidwa patsogolo pa chothandizira imagwiritsidwa ntchito makamaka poyang'anira kapangidwe kakusakaniza. Ngati ichi ndi otchedwa stoichiometric osakaniza, imene kwenikweni kuchuluka kwa mpweya chofunika kutentha mlingo wa mafuta pa mphindi wofanana ndi ongoyerekeza kuwerengetsera kuchuluka, otchedwa bayinare kafukufuku. Imauza olamulira kuti osakaniza ndi olemera kapena owonda (pamafuta), koma osati kuchuluka kwake. Ntchito yomalizayi itha kuchitidwa ndi chotchedwa Broadband lambda probe. Zotsatira zake, zomwe zimadziwika ndi mpweya wa okosijeni mu mpweya wotulutsa mpweya, sizilinso mphamvu yamagetsi yomwe imasintha pang'onopang'ono (monga momwe zilili ndi probe yamitundu iwiri), koma mphamvu yomwe ikuwonjezeka panopa. Izi zimathandiza kuti mipweya yotulutsa mpweya iwerengedwe pamlingo wosiyanasiyana wa mpweya wochulukirapo, womwe umadziwikanso kuti chiŵerengero cha lambda, motero mawu akuti Broadband probe.
Chofufumitsa cha lambda, choyikidwa kumbuyo kwa chosinthira chothandizira, chimagwira ntchito ina. Chifukwa cha ukalamba wa sensa ya okosijeni yomwe ili kutsogolo kwa chothandizira, kusakaniza komwe kumayendetsedwa pamaziko a chizindikiro chake (kuwongolera magetsi) kumakhala kosavuta. Izi ndi zotsatira za kusintha mawonekedwe a kafukufuku. Ntchito ya sensa yachiwiri ya okosijeni ndikuwongolera kuchuluka kwa chisakanizo chowotchedwa. Ngati, malinga ndi zizindikiro zake, woyendetsa injini akuwona kuti kusakaniza kumakhala kowonda kwambiri, kumawonjezera nthawi ya jekeseni moyenerera kuti apeze mapangidwe ake mogwirizana ndi zofunikira za pulogalamu yolamulira.
