Nitrogen oxides (NOx) yog cov pa phem uas tsim los ntawm kev sib xyaw ntawm fossil fuels hauv tsheb thiab cov txheej txheem kev lag luam.

Nitrogen oxides (NOx) yog cov pa phem uas tsim los ntawm kev sib xyaw ntawm fossil fuels hauv tsheb thiab cov txheej txheem kev lag luam.Cov pa phem no tuaj yeem cuam tshuam rau tib neeg kev noj qab haus huv thiab ib puag ncig, ua rau muaj teeb meem ua pa thiab smog tsim.Txhawm rau txo qis nitrogen oxide emissions, ntau lub tsheb thiab cov khoom lag luam tau nruab nrog nitrogen oxide sensors los saib xyuas thiab tswj cov pa phem no.

Nitrogen oxide sensors yog ib feem tseem ceeb ntawm kev tswj cov pa hluav taws xob niaj hnub no vim lawv pab ua kom lub tsheb thiab cov cuab yeej siv ua haujlwm nyob rau hauv cov kev txwv.Cov sensors no ua haujlwm los ntawm kev kuaj xyuas qhov concentration ntawm nitrogen oxides hauv cov pa tawm thiab muab kev tawm tswv yim rau lub cav tswj qhov system, tso cai rau nws los hloov kho kom zoo dua combustion thiab txo nitrogen oxide emissions.

Muaj ntau ntau hom NOx sensors, nrog rau chemiluminescence sensors thiab electrochemical sensors.Chemiluminescence sensors ua haujlwm los ntawm kev ntsuas lub teeb tawm thaum muaj tshuaj lom neeg ntawm nitrogen oxides thiab reactive gases, thaum electrochemical sensors siv tshuaj lom neeg los tsim hluav taws xob teeb liab uas yog proportional rau nitrogen oxide concentration.

Ib qho ntawm cov teeb meem tseem ceeb hauv kev tsim NOx sensors yog ua kom lawv qhov tseeb thiab kev ntseeg siab hauv kev txheeb xyuas cov qib qis ntawm NOx hauv cov pa hluav taws xob nyuaj.Tsis tas li ntawd, cov sensors yuav tsum muaj peev xwm tiv taus qhov kub thiab txias thiab hnyav nyob rau hauv lub tso pa tawm, ua rau lawv yog ib qho tseem ceeb ntawm cov emissions tswj systems.

Nyob rau hauv xyoo tas los no, kev nce qib hauv kev siv thev naus laus zis tau ua rau muaj kev txhim kho ntau dua thiab rhiab NOx sensors.Piv txwv li, qee cov sensors tam sim no suav nrog kev xaiv catalytic txo (SCR) catalysts, uas tuaj yeem xaiv txo cov nitrogen oxides rau nitrogen thiab dej siv cov tshuaj txo qis xws li ammonia.Qhov no tso cai rau kev tswj hwm ntau dua ntawm NOx emissions, tshwj xeeb tshaj yog nyob rau hauv cov cav tov diesel, uas paub txog kev tsim cov NOx ntau dua.

Tsis tas li ntawd, kev qhia txog cov kev cai ntawm lub tsheb onboard diagnostics (OBD) tau txhawb txoj kev loj hlob ntawm NOx sensors ntau dua.Cov sensors tam sim no muaj peev xwm muab cov ntaub ntawv ntawm lub sijhawm tiag tiag rau lub tsheb OBD system, tso cai rau kev saib xyuas thiab tshaj tawm txog NOx emissions.Qhov no yuav pab xyuas kom lub tsheb ua raws li cov qauv emissions thiab pab txheeb xyuas cov teeb meem muaj feem cuam tshuam nrog kev tswj cov emissions.

Raws li tsoomfwv thoob plaws ntiaj teb txuas ntxiv nruj cov cai ntawm NOx emissions, qhov kev thov kom ntseeg tau thiab raug NOx sensors yuav tsum loj hlob.Qhov no tau ua rau muaj kev tshawb fawb thiab kev loj hlob hauv kev siv tshuab sensor nrog kev tsom mus rau kev txhim kho sensor kev ua tau zoo, durability thiab nqi-zoo.

Hauv kev xaus, NOx sensors ua lub luag haujlwm tseem ceeb hauv kev txo qis cov pa phem los ntawm cov tsheb thiab cov khoom siv hauv tsev.Raws li kev siv thev naus laus zis thev naus laus zis nce qib, cov sensors no ua qhov tseeb dua, txhim khu kev qha thiab ntse, tso cai rau kev tswj xyuas zoo dua thiab kev saib xyuas ntawm NOx emissions.Raws li qhov tseem ceeb ntawm kev txo qis NOx emissions txuas ntxiv mus ntxiv, kev txhim kho ntawm NOx sensors siab heev yuav pab ua kom muaj huab cua huv, noj qab nyob zoo rau ntau tiam neeg tom ntej.