Yuav ua li cas txhawm rau ntsuas oxygen sensor nrog oscilloscope
Kev ua haujlwm---Kev hloov pauv ntawm cov pa oxygen hauv cov pa tawm tuaj yeem ua rau lub teeb liab hluav taws xob ntawm cov pa oxygen sensor hloov pauv tsis tu ncua nyob rau hauv qhov ua haujlwm voltage ntau yam. Lub cav tswj qhov hluav taws xob tau txais cov teeb liab voltage los ntawm cov pa oxygen sensor, thiab siv qhov ntsuas hluav taws xob los txiav txim siab lub xeev ntawm qhov sib tov, yog li kho qhov kev txhaj tshuaj pulse dav. Qhov no yog ib txoj kev yooj yim hais rau nws. Lub luag haujlwm ntawm oxygen sensors yog qhov tseem ceeb heev
Kev txawv txav ntawm cov pa oxygen sensor tuaj yeem ua rau muaj ntau yam txhaum, thiab cov tsos mob ntawm qhov txhaum kuj txawv. Cov ntsiab lus nyob ntawm qhov chaw ntawm qhov txhaum, qhov loj ntawm lub teeb liab tus nqi, thiab lub tswv yim tswj ntawm lub tsheb qauv. Cia peb tham txog yuav ua li cas txiav txim qhov txhaum ntawm oxygen sensor.
Muaj peb qhov xwm txheej los xyuas qhov ua tau zoo ntawm cov pa oxygen sensor. Ib qho yog txhawm rau txheeb xyuas qhov tsis kam ntawm lub sensor; lwm qhov yog ntsuas qhov hloov pauv ntawm cov pa oxygen sensor voltage tso zis teeb liab; qhov thib peb yog saib cov xim ntawm cov pa oxygen sensor tsos.
(1) Tshawb xyuas cov pa oxygen sensor kuj. Thaum lub cav kub nce mus txog qhov qub, tshem tawm cov xov hlau txuas ntawm lub ntsuas pa oxygen thiab siv lub ntsuas ntsuas ntsuas los ntsuas qhov ntsuas qhov tsis kam ntawm cov terminals ntawm lub siab sensor. Tus nqi tiv thaiv yuav tsum ua kom tau raws li tus qauv tsim nyog ntawm cov qauv tsheb tshwj xeeb (feem ntau 440Ω). Yog tias tus nqi tiv thaiv tsis yog Yog tias qhov yuav tsum tau ua, cov pa oxygen sensor yuav tsum tau hloov.
(2) Txhawm rau kuaj xyuas qhov hluav taws xob tawm hluav taws xob ntawm cov pa oxygen sensor, tom qab txhim kho cov xaim txuas ntawm cov pa oxygen sensor, coj cov hlau los ntawm lub teeb liab davhlau ya nyob twg, pib lub cav, ua kom lub cav ncav cuag qhov kub thiab txias, thiab tswj lub cav ntawm qhov tsis ua haujlwm. ceev. Lub sijhawm no, siv lub voltmeter los kuaj xyuas qhov tso zis hluav taws xob ntawm cov pa oxygen sensor teeb liab davhlau ya nyob twg. Thaum lub high-voltage tis kab ntawm lub tog raj kheej yog unplugged (hluav taws kub tsis ua hauj lwm), cov pa oxygen cov ntsiab lus nyob rau hauv lub tso pa roj yuav txo. Yog hais tias qhov voltage qhia los ntawm lub voltmeter nce, nws txhais tau hais tias lub sensor ua tau zoo (qhov tso zis voltage ntawm cov pa sensor feem ntau yog 0.20.9V ntawm, nws variation ntau yog nyob ib ncig ntawm 0.5V ).
(3) Thaum kuaj xyuas cov pa oxygen sensor, qee zaum qhov ua rau qhov txhaum kuj tuaj yeem paub los ntawm kev soj ntsuam cov xim ntawm cov pa oxygen sensor. Cov xim ib txwm ntawm cov pa oxygen sensor taub yog lub teeb grey. Thaum cov xim ntawm cov pa oxygen sensor hloov pauv, nws qhia tau hais tias muaj kev ua txhaum lossis zais qhov phom sij ntawm oxygen sensor.
ib. Cov pa oxygen sensor nrog lub hau dub yog tshwm sim los ntawm cov pa phem. Tom qab tshem tawm, cov pa roj carbon deposits ntawm nws yuav tsum tau muab tshem tawm.
b. Yog tias nws pom tias cov pa oxygen sensor muaj lub hau dawb, nws txhais tau hais tias nws yog tshwm sim los ntawm silicon pollution. Qhov no yog vim tsis tsim nyog silicone sealant tau siv thaum lub cav tu. Lub sijhawm no, cov pa oxygen sensor yuav tsum tau hloov.
c. Thaum lub taub ntawm cov pa oxygen sensor pom tias muaj xim liab liab, nws txhais tau hais tias cov pa oxygen sensor kis tau los ntawm cov hlau lead. Qhov no yog vim kev siv cov roj lead hauv lub tsheb.
Txhua yam silicone sealant uas muaj acetic acid (uas ua raws li vulcanizer) yuav ua rau cov pa xa hluav taws xob puas. Silicone tseem hu ua chav kub vulcanization (RTV) kua nplaum. Yog hais tias silica gel muaj acetic acid siv nyob rau hauv lub cav uas lubricating roj ntws, cov acetic acid yuav evaporate mus rau hauv lub crankcase los yog valve cheeb tsam, thiab ces nkag mus rau hauv cov kav dej los ntawm cov pa roj recirculation system. Nyob rau hauv ib txwm ua hauj lwm tej yam kev mob, nws yuav dhau los ntawm lub cav los ntawm lub tso pa tawm yeeb nkab. tso tawm, yog li ua rau cov pa oxygen sensor.
Raws li ib qho tseem ceeb ntawm cov tshuab hluav taws xob tswj cov roj txhaj tshuaj, cov pa oxygen sensor plays lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm lub cav thiab kev tswj cov pa tawm kom zoo. Thaum cov pa oxygen sensor thiab nws cov kab sib txuas ua tsis tiav, tsis yog tsuas yog cov emissions tshaj tus qauv, tab sis lub cav tseem yuav ua rau kev ua haujlwm tsis zoo tuaj yeem ua rau muaj ntau yam tsis zoo xws li kev ua haujlwm tsis zoo thiab kev ua haujlwm tsis raug ntawm lub cav. Yog li ntawd, kev saib xyuas raws sijhawm thiab kev soj ntsuam ntawm cov pa oxygen sensor yog qhov txiaj ntsig zoo los xyuas kom meej tias lub tsheb khiav hauv qhov zoo.
Yog tias cov pa oxygen tsis ua haujlwm, lub teeb feem ntau yuav qhib, lub cav yuav co, cov pa tawm yuav ua rau lub suab nrov, thiab yuav muaj ntxhiab tsw, thiab cov roj noj yuav nce ntxiv. Koj tuaj yeem siv lub cuab yeej kuaj xyuas qhov tsis raug los xyuas qhov voltage. Nws feem ntau hloov ntawm {{0}} 1-1 volts thiab tus lej hloov. Ntau tshaj 8 zaug hauv 10 vib nas this. Yog tias qhov hluav taws xob hloov pauv ntawm 0.1-0.5 volts, nws txhais tau hais tias qhov sib tov yog lean. Yog hais tias nws hloov ntawm 0.5-1 volts, nws txhais tau hais tias qhov sib tov yog nplua nuj heev. Yog tias nws tsis txav nruab nrab ntawm 0.4-0.5, nws txhais tau hais tias qhov sib tov yog nplua nuj heev. Cov pa oxygen sensor puas lawm.
