Kev sojntsuam lambda yog lub ntsuas pa oxygen uas yog qhov tseem ceeb ntawm cov pa hauv tshuab. Yuav kom nws tsis txhob poob, nws yog qhov tsim nyog los nruab ib qhov snag. Nws cov yam ntxwv thiab hom yuav tso cai rau koj xaiv cov qauv tsim nyog tshaj plaws, uas yuav ua rau muaj kev tswj hwm qhov tseeb ntawm cov pa oxygen.
Yam ntxwv
Kev sojntsuam Lambda yog qhov tseem ceeb ntawm txoj kev tso pa uas muaj cov txheej txheem ib puag ncig ntawm tsawg kawg EURO-4. Ua tsaug rau nws, nws muaj peev xwm tswj hwm qib pa oxygen ua ntej thiab tom qab kev tswj hwm. Nws yuav tsum raug sau tseg tias qhov kev sojntsuam lambda tsis raug kho. Yog tias nws dhau los siv tsis tau, nws yuav tsum tau hloov nrog lub ntu tshiab. Feem ntau yuam kev xws li PO167-PO130 qhia qhov kev xav tau no. Vim li ntawd, thiaj yuav tsum tau ua tus saib xyuas nws.
Txhawm rau kom lub cav tsis txhob mus rau hauv kev ua haujlwm xwm txheej ceev vim muaj kev sib tsoo ntawm cov catalyst, nws yog qhov yuav tsum tau soj ntsuam cov roj noj thiab kho qhov teeb liab ntawm DC. Lub luag haujlwm no yog kwv yees los ntawm snag. Yog hais tias lub tsheb ua ke nrog EURO-4, ces cov pa hluav taws xob yuav muaj tsawg kawg yog ob qho kev soj ntsuam ntawm lambda, ib qho yog ua ntej catalyst, thiab lwm tus tom qab nws.
Saib
Nyob rau hauv tag nrho, peb hom trompe l'oeil tau tsim: cov khoom siv hluav taws xob hauv tshuab, tshuab hluav taws xob thiab hluav taws xob rau kev ua haujlwm ntawm kev sojntsuam lambda. Lawv txawv, ua ntej ntawm txhua yam, hauv tus nqi. Mechanical snag yog qhov yooj yim, yog li ntawd pheej yig tshaj. Nws feem ntau yog ua los ntawm tshav kub-tiv taus steel thiab muaj peev xwm nrog withstanding 650 ° C.
Lub ntsiab lus ntawm nws txoj haujlwm ua haujlwm hauv lub ingress ntawm cov pa roj mus rau hauv lub ntim ntawm lub raj hauv los ntawm qhov me me. Hauv nws cov khoom ntim, ntau dhau ntawm CH thiab CO tau oxidized los ntawm oxygen, li ntawm qhov uas nws cov concentration txo. Qhov no hloov qhov sinusoids ntawm lub teeb liab, thiab cov xaim hluav taws xob xav tias cov catalyst ua haujlwm ib txwm ua.
Lwm qhov ob hom yog ua haujlwm thiab tawv, tab sis lawv cov nqi dhau hwv. Hluav taws xob snag yog tsim los xyuas kom tseeb kev ua haujlwm ntawm lub cav tswj thaum lub catalyst raug tshem tawm lossis puas.
Peb tuaj yeem hais tias xws li snag yog ib qho microprocessor ib leeg uas paub qhov xwm txheej uas tshwm sim nrog cov pa roj tsheb sib txawv thaum cov catalyst dhau. Raws li qhov tshwm sim, nws ua tiav cov teeb liab muab los ntawm thawj zaug oxygen oxygen sensor thiab tsim cov teeb liab zoo sib xws uas txhawb los ntawm lub ntsuas thib ob nrog cov ua haujlwm catalyst.
Nws yog qhov zoo tshaj plaws los xaiv cov khoom siv tshuab, vim tias nws muaj lub platinum-rhodium catalytic element, zoo ib yam li cov sib luag ntawm cov thawj catalyst. Ua tsaug rau qhov no, kev sojntsuam lub suab tau txais cov ntaub ntawv hais txog huab cua-roj sib tov uas ua tau raws li cov qauv thoob ntiaj teb ib puag ncig.
