Cov pa oxygen sensor (NOx sensor) yog ib qho sensor siv los kuaj xyuas cov ntsiab lus ntawm nitrogen oxides (NOx) xws li N2O, tsis muaj, NO2, N2O3, N2O4 thiab N2O5 hauv lub cav tso pa. Raws li txoj cai ua haujlwm, nws tuaj yeem muab faib ua electrochemical, optical thiab lwm yam NOx sensors. Siv cov khoom siv hluav taws xob electrolyte yttrium oxide doped zirconia (YSZ) cov khoom siv ceramic rau cov pa ions, cov kev xaiv catalytic rhiab heev ntawm cov khoom tshwj xeeb NOx rhiab electrode rau NOx roj, thiab sib txuas nrog cov qauv tshwj xeeb sensor kom tau txais hluav taws xob teeb liab ntawm NOx, thaum kawg, siv Cov teeb liab tshwj xeeb tsis muaj zog nrhiav kom pom thiab precision hluav taws xob tswj tshuab, NOx roj hauv lub tsheb tso tawm raug kuaj pom thiab hloov mus rau hauv tus qauv CAN tsheb npav digital teeb liab.
Kev ua haujlwm ntawm nitrogen oxygen sensor
NOx ntsuas ntau: 0-1500 / 2000 / 3000ppm NOx
- O2 ntsuas ntau: 0 - 21%
- Qhov siab tshaj plaws tso pa kub: 800 ℃
- siv tau raws li O2 (21%), HC, Co, H2O (< 12%)
- kev sib txuas lus interface: tau
Daim ntawv thov teb ntawm NOx sensor
- Diesel cav tso pa tawm SCR system (ua tau raws li National IV, V thiab VI emission qauv)
- roj av cav tso pa roj kho system
- desulfurization thiab denitration nrhiav kom tau thiab tswj qhov system ntawm fais fab nroj tsuag
Kev sib xyaw ntawm nitrogen oxygen sensor
Lub ntsiab tseem ceeb ntawm NOx sensor yog cov khoom siv hluav taws xob zoo nkauj thiab cov khoom siv SCU
Core ntawm NOx sensor
Vim tias qhov tshwj xeeb siv ib puag ncig ntawm cov khoom, cov nti ceramic yog tsim nrog cov qauv electrochemical. Cov qauv yog complex, tab sis cov teeb liab tso zis yog ruaj khov, cov lus teb ceev ceev, thiab kev pab cuam lub neej ntev. Cov khoom ua tau raws li kev soj ntsuam ntawm NOx emission cov ntsiab lus nyob rau hauv cov txheej txheem ntawm diesel tsheb tso pa tawm. Ceramic rhiab qhov chaw muaj ntau yam kab noj hniav hauv cov kab noj hniav, nrog rau zirconia, alumina thiab ntau yam Pt series hlau conductive pastes. Cov txheej txheem ntau lawm yog qhov nyuaj, qhov kev tshuaj ntsuam luam ntawv raug yuav tsum tau, thiab qhov yuav tsum tau ua ntawm cov khoom siv mis / stability thiab sintering txheej txheem yuav tsum tau.
Tam sim no, muaj peb hom NOx sensors ntawm kev ua lag luam: tiaj tus tsib tus pin, tiaj tus plaub tus pin thiab square plaub tus pin
NOx sensor tuaj yeem sib txuas lus
Lub NOx sensor sib txuas lus nrog ECU lossis DCU los ntawm kev sib txuas lus. Lub rooj sib txoos NOx yog nyob rau hauv kev sib koom ua ke nrog kev kuaj xyuas tus kheej (cov nitrogen thiab oxygen sensor tuaj yeem ua tiav cov kauj ruam no los ntawm nws tus kheej yam tsis tas yuav tsum tau ECU lossis DCU los xam cov nitrogen thiab oxygen concentration). Nws saib xyuas nws tus kheej ua haujlwm hauv lub xeev thiab pub rov qab NOx concentration teeb liab rau ECU lossis DCU los ntawm lub tsheb sib txuas ntawm lub cev.
Kev ceev faj rau kev teeb tsa ntawm NOx sensor
Lub NOx sensor sojntsuam yuav tsum tau ntsia rau ntawm ib nrab ntawm lub catalyst ntawm cov pa tso pa tawm, thiab lub sensor sojntsuam yuav tsum tsis txhob nyob rau ntawm qhov qis tshaj ntawm catalyst. Tiv thaiv kom tsis txhob muaj nitrogen oxygen sojntsuam los ntawm kev tawg thaum ntsib dej. Kev taw qhia kev teeb tsa ntawm nitrogen oxygen sensor tswj chav tsev: teeb tsa lub tswj vaj huam sib luag kom zoo dua tiv thaiv nws. Kev ntsuas kub ntawm NOx sensor control unit: nitrogen thiab oxygen sensor yuav tsum tsis txhob muab ntsia rau hauv qhov chaw uas muaj kub heev. Nws raug nquahu kom nyob deb ntawm cov kav dej thiab ze ntawm lub tank urea. Yog tias cov pa oxygen sensor yuav tsum tau muab tso rau ze ntawm lub tso pa tawm thiab lub tank urea vim qhov kev teeb tsa ntawm tag nrho lub tsheb, cov ntaub thaiv npog cua sov thiab cov paj rwb rwb thaiv tsev yuav tsum tau nruab, thiab qhov ntsuas kub nyob ib ncig ntawm qhov chaw teeb tsa yuav tsum raug ntsuas. Qhov zoo tshaj plaws ua haujlwm kub tsis siab tshaj 85 ℃.
Dew taw tes tiv thaiv muaj nuj nqi: vim tias cov electrode ntawm NOx sensor xav tau qhov kub siab dua ua haujlwm, NOx sensor muaj cov qauv ceramic sab hauv. Ceramics tsis tuaj yeem kov dej ntawm qhov kub thiab txias, thiab nws yooj yim los nthuav thiab cog lus thaum nws ntsib dej, ua rau cov ceramic tawg. Yog li ntawd, NOx sensor yuav tau nruab nrog lub lwg taw tes tiv thaiv muaj nuj nqi, uas yog yuav tsum tau tos rau ib lub sij hawm ntawm lub sij hawm tom qab kuaj pom tias qhov kub thiab txias ntawm cov pa yeeb nkab mus txog qhov teeb meem. ECU lossis DCU xav tias nyob rau hauv qhov kub thiab txias, txawm tias muaj dej ntawm NOx sensor, nws yuav raug cua tshuab los ntawm qhov kub thiab txias.
Kev kuaj pom thiab kuaj pom ntawm NOx sensor
Thaum NOx sensor ua haujlwm ib txwm, nws pom tus nqi NOx hauv cov yeeb nkab tso rau hauv lub sijhawm tiag tiag thiab muab nws rov qab rau ECU / DCU los ntawm CAN tsheb npav. ECU tsis txiav txim siab seb qhov tso pa tawm puas tsim nyog los ntawm kev kuaj xyuas tus nqi NOx lub sijhawm tiag tiag, tab sis kuaj xyuas seb tus nqi NOx hauv cov yeeb nkab tso tawm dhau tus qauv los ntawm cov txheej txheem NOx saib xyuas. Txhawm rau khiav NOx nrhiav pom, cov xwm txheej hauv qab no yuav tsum tau ua tiav:
Lub kaw lus dej txias ua haujlwm ib txwm tsis muaj qhov yuam kev. Tsis muaj kev txhaum cai rau ambient siab sensor.
Cov dej kub yog siab tshaj 70 ℃. Kev kuaj NOx tiav yuav tsum muaj txog 20 tus qauv. Tom qab ib qho kev tshawb pom NOx, ECU / DCU yuav muab piv rau cov ntaub ntawv piv txwv: yog tias qhov nruab nrab tus nqi ntawm tag nrho cov qauv NOx qhov tseem ceeb tsawg dua li tus nqi teev thaum kuaj pom, qhov kev kuaj pom dhau mus. Yog hais tias qhov nruab nrab tus nqi ntawm tag nrho cov qauv NOx qhov tseem ceeb yog ntau dua li tus nqi teev thaum kuaj pom, tus saib xyuas yuav sau qhov yuam kev. Txawm li cas los xij, lub teeb hluav taws xob tsis tau qhib. Yog tias qhov kev soj ntsuam tsis ua tiav ob zaug sib law liag, lub kaw lus yuav ceeb toom Super 5 thiab super 7 txhaum cai, thiab lub teeb mil yuav qhib.
Thaum lub 5 txhaum cai dhau lawm, lub mil teeb yuav nyob rau, tab sis lub torque yuav tsis txwv. Thaum lub 7 txhaum cai dhau lawm, lub mil teeb yuav qhib thiab lub kaw lus yuav txwv lub torque. Lub torque txwv yog teem los ntawm tus qauv tsim.
Lus Cim: Txawm hais tias qhov emission overrun txhaum ntawm qee cov qauv raug kho, lub teeb mil yuav tsis tawm mus, thiab qhov txhaum yuav tshwm sim raws li keeb kwm txhaum cai. Nyob rau hauv cov ntaub ntawv no, nws yog tsim nyog los txhuam cov ntaub ntawv los yog ua lub siab NOx reset function.
Kev vam khom ntawm pab pawg tuam txhab 22 xyoo ntawm kev lag luam kev paub thiab muaj zog software R & D muaj peev xwm, Yunyi Electric tau siv los ntawm pab pawg kws tshaj lij hauv tsev thiab koom ua ke cov peev txheej ntawm peb R & D puag ncig thoob ntiaj teb kom ua tiav qhov tshiab tshiab hauv NOx sensor tswj. software algorithm thiab cov khoom calibration txuam, thiab daws kev lag luam mob cov ntsiab lus, tsoo los ntawm kev siv technology monopoly, txhawb kev loj hlob nrog science thiab technology, thiab guaranteed zoo nrog professionalism. Thaum Yunyi hluav taws xob txhim kho kev tsim cov NOx sensors mus rau qib siab dua, qhov kev tsim tawm txuas ntxiv nthuav dav, yog li Yunyi nitrogen thiab oxygen sensors teeb tsa qhov kev ntsuas zoo hauv kev lag luam!
Post lub sij hawm: Sep-02-2022