Post-oxygen sensor

Mazuva ano, mota dzakashongedzerwa nemasensa maviri eokisijeni, imwe iri pamberi peiyo nzira nhatu inokonzeresa uye imwe kumashure kwayo. Basa repamberi nderokuona chiyero chemhepo-mafuta ejini pasi pemamiriro akasiyana ekushanda, uye panguva imwechete, komputa inogadzirisa huwandu hwejekiseni yemafuta uye inoverenga nguva yekudzima zvinoenderana nechiratidzo ichi. Iyo yekumashure inonyanya kuyedza basa retatu-nzira catalytic converter! Kureva chiyero chekutendeuka kwechikonzero. Ihwo hwaro hwakakosha kuti uedze kana iyo nzira nhatu-catalyst inoshanda zvakajairwa (yakanaka kana yakaipa) nekuenzanisa nedata remberi okisijeni sensor.

sumo yekuumbwa

Iyo okisijeni sensor inoshandisa Nernst musimboti.

Chinhu chayo chepakati ndeye porous ZrO2 ceramic chubhu, inova yakasimba electrolyte, uye mativi ayo maviri ari sintered ane porous Pt electrodes. Pane imwe tembiricha, nekuda kwekuwanda kwakasiyana kweokisijeni kumativi ese, mamorekuru eokisijeni ari kudivi rakakwirira-yakadzika (mukati me4 yechubhu yeceramic) anoiswa paplatinamu electrode uye anosanganiswa nemaerekitironi (4e) kuti aumbe maion eokisijeni O2- , iyo inoita kuti electrode iite zvakanaka, uye O2- ions inotamira kune yakaderera-oxygen concentration side (exhaust gas side) kuburikidza neokisijeni ion vacancies mu electrolyte, iyo inoita kuti electrode iparadzwe zvakashata, ndiko kuti, mutsauko unogona kuitika unogadzirwa.

Kana iyo mhepo-mafuta reshiyo yakaderera (yakapfuma musanganiswa), kune okisijeni shoma mumhepo yekuburitsa, saka kune mashoma maion okisijeni kunze kweceramic chubhu, kuumba simba re electromotive rinenge 1.0V;

Kana chiyero chemafuta emhepo chakaenzana ne 14.7, simba re electromotive rinogadzirwa mukati nekunze kwemativi e ceramic tube i 0.4V ~ 0.5V, iyo inoreva simba re electromotive;

Kana chiyero chemafuta emhepo chakakwira (musanganiswa wakaonda), iyo okisijeni iri mugasi rekuburitsa yakakwira, uye musiyano weiyo okisijeni ion mukati nekunze kweceramic chubhu idiki, saka simba re electromotive rakaderera uye riri pedyo ne zero. .

Heated oxygen sensor:

-Heated okisijeni sensor ine simba rekutungamira kuramba;

-Iyo haina kutsamira pane tembiricha yekupedza, uye inogona kushanda seyakajairwa pasi pemutoro wakaderera uye yakaderera yekupisa tembiricha;

-Kurumidza kupinda iyo yakavharwa-loop control mushure mekutanga.