Vim li cas peb yuav tsum kawm cov teeb liab sib tsoo ntawm lub waveform ntawm oxygen sensor?

Qhov no yog vim hais tias cov clutter yuav tshwm sim los ntawm qhov tsawg combustion efficiency. Tsuav qhov nce-flow system tsis nyob rau hauv lub xeev ua hauj lwm raug, lub catalyst tsis tuaj yeem raug kuaj kom raug. Lub clutter ntawm oxygen sensor waveform tuaj yeem ceeb toom qhov poob ntawm kev ua haujlwm ntawm txhua lub tog raj kheej lub cav. Lub sijhawm no, kev kuaj xyuas cov pa tawm yog qhov tseem ceeb tshaj plaws. Vim tias nws tuaj yeem pom tias kev hloov pauv kev ua haujlwm ntawm cov catalyst txo qis thiab kev ua haujlwm ntawm tus kheej kheej kheej txo. Clutter signals kuj cuam tshuam qhov kev ua haujlwm ib txwm muaj ntawm tus tswj hwm ntawm cov roj tawm tswv yim tswj qhov system (cov lus tawm tswv yim hauv lub cav tswj lub computer khiav). "Fuel feedback controller controller" yog hais txog qhov kev pab cuam software (hu ua "feedback controller"), uas yog ib qho kev pab cuam uas tau txais cov teeb liab voltage ntawm oxygen sensor thiab xam qhov tseeb tam sim roj txhaj tshuaj los yog sib tov tswj cov lus txib. Feem ntau, cov kev tawm tswv yim tswj tsis tau tsim los kom tshem tawm cov zaus ntawm cov pa oxygen sensor uas tsim los ntawm kev ua haujlwm tsis zoo thiab cov lus txib tswj roj. Lub teeb liab tsis sib haum xeeb ntawm qhov tsis sib haum xeeb tuaj yeem ua rau lub tswv yim tswj tsis tau qhov tseeb lossis "cov lus teb rov qab". Muaj ob peb qhov teebmeem ntawm no. Ua ntej, thaum qhov kev ua haujlwm raug ntawm tus tswj kev tawm tswv yim raug cuam tshuam, cov roj sib tov sib xyaw yuav dhau ntawm lub qhov rais catalyst, uas yuav cuam tshuam rau kev ua haujlwm ntawm lub converter thiab tso pa tawm. Qhov thib ob, lub cav kev ua tau zoo kuj yuav cuam tshuam. Clutter tuaj yeem yog ib qho kev txiav txim siab tias cov pa tawm ntawm cov pa tawm mus rau hauv cov catalyst. Nws feem ntau pom tias thaum muaj kev sib tsoo, cov pa roj nkag mus rau hauv cov catalyst tsis muaj qhov tseeb ntawm huab cua-roj piv. Nws yog ib qho tseem ceeb heev kom nkag siab txog qhov sib tsoo ntawm lub nthwv dej ntawm cov pa oxygen sensor rau kev kho thiab kuaj xyuas cov pa pa tawm. Qee qhov xwm txheej, kev sib tsoo yog ib qho teeb meem pom tseeb tias qhov kev hloov pauv catalytic txo qis, thiab tom qab ntawd cov pa emissions dhau tus qauv. Tsis tas li ntawd, kev piav qhia ntawm kev sib tsoo ntawm lub waveform ntawm oxygen sensor yog ib qho cuab yeej tseem ceeb rau kev kuaj mob ntawm lub cav ua haujlwm lossis kev muaj peev xwm tsav tsheb. Clutter yog ib qho qhia txog qhov tsis sib xws hauv kev sib xyaw ua haujlwm ntawm ib lub tog raj kheej mus rau lwm qhov. Kev piav qhia thiab kev nkag siab ntawm kev sib tsoo ntawm lub waveform ntawm cov pa oxygen transmitter kuj tseem ceeb heev rau kev siv cov pa oxygen sensor teeb liab kho thiab xyuas kom zoo. Kev sib tsoo ntawm lub nthwv dej ntawm cov pa oxygen sensor qhia tias cov pa pa hloov pauv ntawm ib lub tog raj kheej mus rau lwm qhov tsis sib npaug, lossis tshwj xeeb tshaj yog, cov ntsiab lus oxygen siab dua tsis tau txais los ntawm tus kheej cov txheej txheem combustion. Feem ntau cov pa oxygen sensors tuaj yeem ceev ceev rov qab qhov sib txawv ntawm qhov hluav taws xob uas tsim los ntawm txhua txoj kev combustion thaum lawv ua haujlwm ib txwm. Qhov ntau dua cov teeb liab txwv ntawm kev sib tsoo, qhov sib txawv ntawm cov pa oxygen ntau dua ntsuas los ntawm txhua qhov txheej txheem combustion. Cov kev sib tsoo pom nyob rau hauv kev tsav tsheb sib txawv tsis yog tsuas yog ib qho tseem ceeb los txiav txim siab lub hauv paus ua rau tsis ua hauj lwm ntawm qhov tsis ua hauj lwm hauv lub xeev thiab cov pa hluav taws xob tsis tu ncua, tab sis kuj yog ib qho kev txiav txim zoo rau kev kuaj xyuas kev tsav tsheb. Cov pa oxygen sensor teeb liab clutter uas tsim ib-rau-ib tso tawm waveform nrog lub ncov burr ntawm BC nyob rau hauv lub acceleration hom yog ib tug tseem ceeb heev diagnostic teeb liab, vim hais tias nws txhais tau hais tias lub ignition yuav poob nyob rau hauv load. Feem ntau, qhov loj dua qhov clutter amplitude. Muaj ntau cov pa oxygen sensors nyob rau hauv cov pa tso pa, yog li qhov clutter yog ib qho qhia tau tias qhov nruab nrab cov pa oxygen ntawm cov lus tawm tswv yim cov pa nkag mus rau hauv catalyst nce ua ntej tso pa tawm, thiab nitrogen oxide hauv catalyst tsis tuaj yeem txo qis (tshuaj lom neeg) hauv cov nplua nuj oxygen. ib puag ncig (lean mix). Txhawm rau ua kom tiav, nws paub tias cov teeb liab sib tsoo ntawm lub waveform ntawm oxygen sensor nrog cov lus tawm tswv yim zoo tag nrho tsis muaj kev cuam tshuam rau cov pa roj lossis lub cav ua haujlwm. Ib qho me me ntawm kev sib tsoo tuaj yeem tsis quav ntsej, thaum ntau qhov sib tsoo tseem ceeb. Qhov no tsuas yog qhia tau tias kev kuaj mob yog kev kos duab. Kawm los txiav txim seb qhov twg yog qhov tsis sib xws thiab qhov tsis xav tau kev xyaum, thiab tus kws qhia zoo tshaj plaws yog kev paub. Txoj hauv kev zoo tshaj plaws los kawm yog soj ntsuam cov waveform ntawm oxygen sensor los ntawm kev soj ntsuam cov mais sib txawv thiab ntau hom tsheb. To taub dab tsi yog ib txwm clutter thiab dab tsi yog txawv txav clutter yog ib qho tseem ceeb heev rau kev kho cov pa emissions zoo thiab kev kuaj muaj peev xwm tsav tsheb, thiab nws yog tsim nyog siv sij hawm los kawm. Rau feem ntau cov tshuab, software waveform yog qhov tseem ceeb. Muaj cov pa oxygen sensor siv waveform rau lub kaw lus tswj tau tuaj yeem txiav txim siab seb qhov clutter zoo li cas thiab qhov qub, thiab hom kev sib tsoo yuav tsum tau them nyiaj rau. Cov txheej txheem rau kev sib tsoo zoo yog: yog tias lub cav ua haujlwm zoo, yuav tsum tsis muaj lub tshuab nqus tsev vacuum, thiab cov tshuaj hydrocarbon (HC) thiab cov ntsiab lus ntawm cov pa oxygen hauv cov pa tawm yog qhov qub. Hauv ib feem ntawm qhov kev sim no, yuav muab cov ntaub ntawv ntau npaum li qhov ua tau kom nkag siab tias tsuas muaj lub sijhawm thiab qhov chaw txaus los npog tag nrho cov ncauj lus hais txog qhov no hauv qhov kev cob qhia no.