Mota okisijeni sensor.
Mota okisijeni sensor ndiyo yakakosha mhinduro sensor muEFI injini yekudzora system, uye ndicho chikamu chakakosha chekudzora kubuda kwemotokari, kuderedza kusvibiswa kwezvakatipoteredza nekuvandudza kunaka kwemafuta einjini yemotokari.
Kune marudzi maviri eokisijeni sensors, zirconia uye titanium dioxide.
Oxygen sensor iko kushandiswa kweceramic inonzwa zvinhu kuyera kugona kweokisijeni muchoto chakasiyana chekupisa kana pombi dzekupedza simba, kuverenga iyo inoenderana neokisijeni mazinga nemusimboti wekemikari chiyero, kutarisa uye kudzora kupisa kwemhepo-mafuta chiyero muchoto, kuve nechokwadi. Chigadzirwa chemhando uye exhaust emission zviyero zvekuyera zvinhu, zvinoshandiswa zvakanyanya mumhando dzese dzekupisa marasha, kupisa kwemafuta, kupisa gasi uye kumwe kudzora kwemhepo yevira.
Iyo okisijeni sensor inoshandiswa kudzora nemagetsi iyo mhinduro yekudzora sisitimu yemafuta jekiseni mudziyo kuona iyo okisijeni mugasi rekuburitsa uye density yemhepo-mafuta reshiyo, kutarisa theoretical air-fuel ratio (14.7: 1) kupisa. muinjini, uye kutumira masaini emhinduro kune komputa.
Kushanda musimboti
Iyo okisijeni sensor inoshanda zvakafanana nebhatiri, ine element zirconia mu sensor ichiita se electrolyte. Musimboti wekushanda ndewekuti: pasi pemamwe mamiriro (tembiricha yakakwira uye platinum catalysis), mutsauko weokisijeni pakati pemukati nekunze kweHao oxide unoshandiswa kuunza mutsauko unogona kuitika, uye nekuwanda kwemusiyano wekuisa pfungwa, kunowedzera mutsauko unogona kuitika. . Izvo zviri mukati meokisijeni mumhepo ndeye 21%, gasi rekubuda mushure mekupisa kwakanyanya harina okisijeni, uye gasi rekuburitsa rinogadzirwa mushure mekupisa kwemusanganiswa wedilute kana gasi rekuburitsa rinogadzirwa nekushaikwa kwemoto rine okisijeni yakawanda, asi. ichiri shoma zvikuru pane oxygen iri mumhepo.
Pasi pe catalysis yekushisa kwepamusoro uye platinamu, iyo okisijeni yakanamirwa kune okisijeni sensor inopedzwa, saka mutsauko wevoltage unogadzirwa, iyo inobuda voltage yemusanganiswa wakaiswa iri padyo ne1V, uye musanganiswa wedilute uri pedyo ne0V. Zvinoenderana neiyo voltage chiratidzo cheiyo okisijeni sensor, iyo mhepo-mafuta reshiyo inodzorwa kugadzirisa iyo jekiseni jekiseni pulse hupamhi, saka yemagetsi kutonga kweokisijeni sensor ndiyo kiyi sensor yemafuta metering. Iyo okisijeni sensor inogona kungoratidzwa zvizere pakupisa kwakanyanya (kuguma kunosvika kupfuura 300 ° C) uye inogona kubuda voltage. Inopindura nekukurumidza kune shanduko mumusanganiswa panenge 800 ° C.
Mazano
Iyo zirconium dioxide okisijeni sensor inoratidza shanduko yekusangana kwemusanganiswa unopisa kuburikidza nekuchinja kwemagetsi, uye titanium dioxide okisijeni sensor inoratidza shanduko yemusanganiswa unopisa kuburikidza nekuchinja kwekupokana. Iyo yemagetsi control system inoshandisa zirconia okisijeni sensor haigone kudzora iyo chaiyo yemhepo-mafuta reshiyo padyo neiyo theoretical mweya-mafuta reshiyo kana injini yekushanda mamiriro yakashata, nepo titanium dioxide okisijeni sensor inogona zvakare kudzora chaiyo mhepo-mafuta reshiyo padyo neiyo theoretical. mhepo-mafuta reshiyo kana injini yekushanda mamiriro yakashata.
Iyo jekiseni vhoriyamu (injection pulse wide) inogadziriswa neiyo control unit munguva pfupi maererano neokisijeni sensor chiratidzo inonzi pfupi-nguva pfupi mafuta kugadziriswa, iyo inodzorwa neinobuda voltage yeokisijeni sensor.
Kugadziriswa kwemafuta kwenguva refu ndiko kukosha kunotarwa neiyo control unit's modified ye control unit's operating data structure maererano neshanduko yenguva pfupi yemafuta ekugadzirisa coefficient.
Common kukanganisa
Kamwe iyo okisijeni sensor yakundikana, komputa yemagetsi jekiseni jekiseni system haigone kuwana ruzivo rweokisijeni yekumisikidza mupombi yekupedza, saka haigone kudzora chiyero chemhepo-mafuta, izvo zvinowedzera kushandiswa kwemafuta ejini uye kupera kusvibiswa, uye injini ichaonekwa isina kugadzikana isingaite kumhanya, kushaikwa kwemoto, kuvhiya uye zvimwe zvinokanganisa zviitiko. Naizvozvo, kukanganisa kunofanirwa kubviswa kana kutsiviwa nenguva yakakodzera [1].
Poisoning kukanganisa
Oxygen sensor poisoning inowanzoitika uye yakaoma kudzivirira kukundikana, kunyanya kushandiswa kwemotokari dzinotungamirira peturu, kunyange iyo itsva okisijeni sensor, inogona kungoshanda zviuru zvishoma zvemakiromita. Kana ichingova chepfu diki yekutungamirira, ipapo kushandisa tangi yepeturu isina mutobvu inogona kubvisa mutobvu pamusoro peiyo okisijeni sensor uye kuidzosera kune yakajairika kushanda. Zvisinei, kazhinji nekuda kwekushisa kwekushisa kwepamusoro, mutobvu unopinda mukati mawo, uchidzivisa kupararira kweokisijeni ions, zvichiita kuti sensor okisijeni isashande, panguva iyo inogona kungotsiviwa.
Uye zvakare, silicon chepfu yeokisijeni sensors zvakare inowanzoitika. Kazhinji, iyo silica inogadzirwa mushure mekupiswa kwesilicon compounds iri mupeturu nemafuta ekuzora, uye gasi resilicone rinobudiswa nekushandiswa zvisina kunaka kwesilicone rubber sealing gaskets ichaita kuti sensor yeokisijeni ikundike, saka mafuta akanaka uye mafuta ekuzora anofanira kushandiswa. .
Paunenge uchigadzira, zvinodikanwa kunyatsosarudza uye kuisa rubber gaskets, usashandise zvinonyungudutsa uye anti-stick agents kunze kweiyo inotsanangurwa nemugadziri pane sensor, nezvimwewo Nekuda kwekupisa kweinjini, carbon deposits inoumbwa pamusoro pe iyo okisijeni sensor, kana mafuta kana guruva uye mamwe sediments anopinda mukati meokisijeni sensor, iyo inodzivisa kana kuvhara mhepo yekunze mukati memukati weokisijeni sensor, kuitira kuti chiratidzo chinobuda cheokisijeni sensor chirege kurongeka. IECU haigoni kugadzirisa chiyero chemhepo-mafuta munguva. Kugadzirwa kwekabhoni deposits kunonyanya kuratidzwa sekuwedzera kwemafuta ekushandisa uye kuwedzera kukuru kweiyo emission concentration. Panguva ino, kana sediment ikabviswa, inodzokera kubasa rakajairika.
Ceramic kuputika
Iyo ceramic yeokisijeni sensor yakaoma uye ine brittle, uye kugogodza nezvinhu zvakaoma kana kuvhuvhuta nemhepo yakasimba inogona kuita kuti iparare nekutadza. Naizvozvo, zvinodikanwa kunyanya kungwarira pakubata nezvinetso uye kuzvitsiva nenguva.
The block wire inopiswa
Waya inodzivirira kupisa inopiswa. Kune iyo inopisa oksijeni sensor, kana iyo heater inopikisa waya yakapiswa, zvakaoma kuita kuti sensor isvike kune yakajairika tembiricha yekushanda uye kurasikirwa nebasa rayo.
Kudimburwa kwemutsara
Kutenderera kwemukati kweokisijeni sensor kunobviswa.
Nzira yekuongorora
Heater resistance check
Bvisa plug yeokisijeni sensor harness, uye shandisa multimeter kuyera kupikisa pakati pedanda rekudziya uye simbi yesimbi mune okisijeni sensor terminal. Iko kukosha kwekupikisa ndeye 4-40Ω (tarisa kune mirairo yeiyo chaiyo modhi). Kana iyo isingasviki chiyero, tsiva iyo okisijeni sensor.
Kuyera kwemhinduro voltage
Pakuyera voltage yemhinduro yeokisijeni sensor, harness plug yeokisijeni sensor inofanirwa kuburitswa, uye waya yakatetepa inofanira kudhonzwa kubva kune inobuda terminal yemhinduro yevoltage yeokisijeni sensor zvinoenderana nedhiyagiramu yedunhu remuenzaniso, uye ndokuzobairirwa plug yeharness. Mhepo yemhinduro inogona kuyerwa kubva pamutsetse wekutungamirira panguva yekushanda kweinjini (mamwe mamodheru anogonawo kuyera mhinduro yevoltage yeokisijeni sensor kubva pasoketi yekuona kukanganisa). Semuenzaniso, nhevedzano yemota dzakagadzirwa neToyota Motor Company inogona kuyera mhinduro yevoltage yeokisijeni sensor yakananga kubva kuOX1 kana OX2 zviteshi mune yekuona kukanganisa socket).
Pakuyera mhinduro yevoltage yeokisijeni sensor, zviri nani kushandisa chinongedzo mhando multimeter ine yakaderera renji (kazhinji 2V) uye yakakwirira impedance (yemukati kuramba yakakura kupfuura 10MΩ). Iyo chaiyo nzira dzekuona ndeidzi:
1. Shandura injini inopisa kune yakajairika tembiricha yekushanda (kana kumhanya pa2500r / min mushure mekutanga kwe2min);
2. Batanidza peni yakaipa ye multimeter voltage stop kuE1 kana kuti electrode yakaipa yebheteri mune chigadziko chekuona chinokanganisa, uye peni yakanaka kune OX1 kana OX2 jack mubhokisi rekutsvaga kukanganisa, kana kunhamba | pane wiring harness plug yeokisijeni sensor.
3, rega injini irambe ichimhanya inosvika 2500r/min, uye tarisa kuti voltmeter pointer inogona kuzungunuka here nekudzoka pakati pe0-1V, uye nyora nhamba yevoltmeter pointer swings mukati megumi. Mumamiriro ezvinhu akajairwa, nekufambira mberi kwekutonga kwemhinduro, iyo voltage yemhinduro yeokisijeni sensor inogara ichichinja pamusoro uye pazasi 0.45V, uye iyo voltage yemhinduro inofanirwa kuchinja isingasviki ka8 mukati me10s.
Kana iri pasi pe8 nguva, zvinoreva kuti iyo okisijeni sensor kana mhinduro yekugadzirisa system haisi kushanda zvakanaka, iyo inogona kukonzerwa nekabhoni kuunganidza pamusoro peiyo okisijeni sensor, kuitira kuti kunzwisiswa kuderedzwa. Kuti izvi zviitike, injini inofanira kushandiswa pa 2500r / min kweinenge maminitsi maviri kuti ibvise carbon deposits pamusoro peiyo okisijeni sensor, uye wozotarisa mhinduro yemagetsi. Kana iyo voltmeter pointer ichiri kuchinja zvishoma nezvishoma mushure mekunge kabhoni inogona kubviswa, inoratidza kuti iyo okisijeni sensor yakakuvadzwa, kana komputa mhinduro yekudzora dunhu yakanganisa.
4, okisijeni sensor kutaridzika kwemavara ekuongorora
Bvisa iyo okisijeni sensor kubva papombi yekupedza uye tarisa kana gomba remhepo paimba ye sensor rakavharwa uye iyo ceramic core yakakuvadzwa. Kana yakanganiswa, tsiva iyo okisijeni sensor.
Kukanganisa kunogonawo kutariswa nekucherechedza ruvara rwechikamu chepamusoro cheokisijeni sensor:
1, chiedza chegrey pamusoro: iyi ndiyo yakajairika ruvara rweokisijeni sensor;
2, chena pamusoro: inokonzerwa nesilicon kusvibiswa, iyo okisijeni sensor inofanira kutsiviwa panguva ino;
3, brown top (sezvinoratidzwa mumufananidzo 1) : inokonzerwa nekusvibiswa kwemutobvu, kana yakakomba, inofanirawo kutsiva iyo okisijeni sensor;
(4) Kumusoro kwakasviba: kunokonzerwa nekabhoni deposition, mushure mekubvisa kabhoni deposition kukanganisa kweinjini, iyo kabhoni deposition pane okisijeni sensor inogona kazhinji kubviswa otomatiki.
Kana iwe uchida kuziva zvakawanda, ramba uchiverenga zvimwe zvinyorwa pane ino saiti!
Ndapota tifonere kana uchida zvigadzirwa zvakadaro.
Zhuo Meng Shanghai Auto Co., Ltd.yakazvipira kutengesa MG&MAUXS auto zvikamu zvinogamuchirwaKutenga.
