Tom qab oxygen sensor

Niaj hnub no, cov tsheb tau nruab nrog ob lub ntsuas pa oxygen, ib qho nyob rau pem hauv ntej ntawm peb txoj kev catalyst thiab ib qho tom qab. Kev ua haujlwm ntawm lub hauv ntej yog txhawm rau txheeb xyuas cov huab cua-roj piv ntawm lub cav nyob rau hauv kev ua haujlwm sib txawv, thiab tib lub sijhawm, lub khoos phis tawj kho cov roj txhaj tshuaj kom muaj nuj nqis thiab suav lub sijhawm ignition raws li cov teeb liab no. Lub nraub qaum yog tsuas yog sim ua haujlwm ntawm peb txoj kev catalytic converter! Xws li tus nqi hloov pauv ntawm cov catalyst. Nws yog lub hauv paus tseem ceeb los ntsuas seb qhov peb-txoj kev catalyst ua haujlwm li cas (zoo lossis phem) los ntawm kev sib piv nrog cov ntaub ntawv ntawm lub hauv ntej oxygen sensor.

qhia txog kev muaj pes tsawg leeg

Cov pa oxygen sensor siv Nernst txoj cai.

Nws cov ntsiab lus tseem ceeb yog cov ntxeem tau ZrO2 ceramic raj, uas yog cov khoom electrolyte, thiab nws ob sab yog sintered nrog ntxeem tau Pt electrodes. Ntawm qhov kub thiab txias, vim qhov sib txawv ntawm cov pa oxygen ntawm ob sab, cov pa oxygen molecules ntawm sab siab siab (sab hauv 4 ntawm lub raj ceramic) yog adsorbed ntawm platinum electrode thiab ua ke nrog electrons (4e) los tsim cov pa oxygen ions O2- , uas ua rau lub electrode zoo them, thiab O2- ions migrate mus rau qis-oxygen concentration sab (kua pa sab) los ntawm oxygen ion vacancies nyob rau hauv lub electrolyte, uas ua rau lub electrode tsis zoo them, uas yog, muaj peev xwm sib txawv yog generated.

Thaum cov huab cua-roj piv qis qis (nplua nuj sib xyaw), muaj cov pa oxygen tsawg dua hauv cov pa tso pa, yog li muaj cov pa oxygen ions tsawg dua sab nraum lub raj ceramic, tsim cov hluav taws xob hluav taws xob txog li 1.0V;

Thaum cov huab cua-roj piv yog sib npaug rau 14.7, lub electromotive quab yuam generated nyob rau hauv lub puab thiab sab sab ntawm lub ceramic raj yog 0.4V ~ 0.5V, uas yog siv electromotive quab yuam;

Thaum cov huab cua-roj piv yog siab (ntsib sib tov), ​​cov pa oxygen hauv cov pa tso pa yog siab, thiab qhov sib txawv ntawm cov pa oxygen ions sab hauv thiab sab nraum lub raj ceramic yog me me, yog li lub electromotive quab yuam tsawg heev thiab ze rau xoom. .

Heated oxygen sensor:

-Heated oxygen sensor muaj cov hlau lead muaj zog;

-Nws yog tsawg dua nyob ntawm qhov tso cua sov, thiab tuaj yeem ua haujlwm raws li ib txwm muaj nyob rau hauv qis qis thiab qis tso cua sov;

- Nkag mus rau lub voj kaw nrawm tom qab pib.