Yuav kuaj USR li cas
Txheem
Kev tshuaj xyuas lub kaw lus los mus txheeb xyuas qhov ua tau zoo ntawm EGR valve, nws cov sensor, nrog rau lwm yam khoom ntawm crankcase ventilation system (Exhaust Gas Recirculation). Txhawm rau kuaj xyuas, tus neeg tsav tsheb yuav xav tau lub tshuab hluav taws xob multimeter uas muaj peev xwm ua haujlwm hauv ohmmeter thiab voltmeter hom, lub tshuab nqus tsev twj, ECU scanner yuam kev. raws nraim yuav ua li cas mus xyuas eg yuav nyob ntawm seb lub ntsiab ntawm lub system. Qhov kev sim yooj yim tshaj plaws rau kev ua haujlwm tau tuaj yeem yog qhov kev pom zoo li niaj zaus ntawm kev ua haujlwm thaum lub zog siv rau nws lossis cua tawm.
EGR system yog dab tsi
Txhawm rau kom nkag siab txog cov lus piav qhia ntawm USR kev kuaj xyuas kev noj qab haus huv, nws tsim nyog luv luv nyob ntawm seb nws yog dab tsi, vim li cas nws thiaj li xav tau thiab nws ua haujlwm li cas. Yog li, txoj haujlwm ntawm EGR system yog txhawm rau txo cov theem ntawm kev tsim cov nitrogen oxides hauv cov pa tawm. Nws tau nruab rau ntawm cov roj av thiab diesel xyaw, tshwj tsis yog cov uas nruab nrog lub turbocharger (txawm tias muaj kev zam). Kev txwv kev tsim cov nitrogen oxides yog ua tiav vim qhov tseeb tias ib feem ntawm cov pa roj carbon monoxide raug xa rov qab mus rau hauv lub cav combustion rau tom qab hlawv. Vim li no, qhov kub ntawm lub combustion chamber txo, lub tso pa yuav tsis muaj tshuaj lom, detonation txo qis raws li lub sij hawm ignition ntau dua thiab siv roj txo.
Thawj EGR systems yog pneumomechanical thiab ua raws li EURO2 thiab EURO3 ib puag ncig cov qauv. Nrog rau kev nruj ntawm cov qauv ib puag ncig, yuav luag txhua lub tshuab EGR tau dhau los ua hluav taws xob. Ib qho ntawm cov khoom tseem ceeb ntawm lub kaw lus yog USR valve, uas kuj suav nrog lub sensor uas tswj txoj haujlwm ntawm lub valve. Lub tshuab hluav taws xob tswj hluav taws xob tswj kev ua haujlwm ntawm pneumatic valve siv cov tswj electro-pneumatic valve. Yog li, kev tshuaj xyuas USR los mus nrhiav kev ua haujlwm ntawm USR valve, nws cov sensor, nrog rau kev tswj hwm qhov system (ECU).
Qhov taw qhia tawg
Muaj ntau cov cim sab nraud qhia tias muaj teeb meem nrog lub kaw lus, uas yog EGR sensor. Txawm li cas los xij, cov cim hauv qab no tuaj yeem qhia txog lwm yam kev puas tsuaj hauv lub tshuab hluav taws xob sab hauv, yog li kev kuaj mob ntxiv yog xav tau ob qho tib si rau lub cev tag nrho thiab rau lub valve tshwj xeeb. Feem ntau, cov tsos mob ntawm EGR valve tsis ua haujlwm yuav yog cov cim hauv qab no:
- Txo lub zog ntawm lub combustion engine sab hauv thiab poob ntawm lub dynamic yam ntxwv ntawm lub tsheb. Ntawd yog, lub tsheb "tsis rub" thaum tsav tsheb nce toj thiab hauv lub xeev thauj khoom, thiab tseem nrawm nrawm ntawm qhov tsis zoo.
- Kev ua haujlwm tsis ruaj khov ntawm lub cav combustion sab hauv, "floating" ceev, tshwj xeeb tshaj yog thaum tsis ua haujlwm. Yog tias lub cev muaj zog khiav qis, nws yuav nres tam sim ntawd.
- ICE khw muag khoom sai tom qab pib. Nws tshwm sim thaum lub valve tau daig qhib thiab cov pa pa tawm mus rau qhov nqus tau tag nrho.
- Kev siv roj ntau ntxiv. Qhov no yog tshwm sim los ntawm kev txo qis hauv lub tshuab nqus tsev hauv cov khoom siv manifold, thiab vim li ntawd, qhov rov ua kom zoo dua ntawm cov cua-roj sib tov.
- Yuam kev tiam. Feem ntau, lub teeb ceeb toom "check engine" tau qhib rau ntawm lub dashboard, thiab tom qab ua qhov kev kuaj mob nrog cov khoom siv scanning, koj tuaj yeem pom cov teeb meem cuam tshuam nrog kev ua haujlwm ntawm USR system, piv txwv li, yuam kev p0404, p0401, p1406 thiab lwm yam.
Yog tias tsawg kawg yog ib qho ntawm cov cim qhia tau tshwm sim, nws tsim nyog kuaj tam sim siv lub tshuab luam ntawv yuam kev, nws yuav ua kom paub tseeb tias qhov teeb meem nyob hauv USR valve. Piv txwv li, Scan Tool Pro Dub Edition ua rau nws muaj peev xwm nyeem tau qhov yuam kev, saib cov kev ua tau zoo ntawm ntau yam sensors hauv lub sijhawm tiag tiag thiab txawm tias kho qee qhov tsis zoo.
Nrog rau lub scanner no, koj tuaj yeem pom yuav ua li cas lub solenoid valve ntawm lub tshuab nqus tsev regulator ua haujlwm (cov ntsiab lus ntawm qhov kawg ntawm tsab xov xwm). Muaj cov cuab yeej zoo li no, koj tuaj yeem tshawb pom qhov laj thawj sai sai thiab pib tshem tawm nws. Kev kuaj lub valve hauv lub chaw nres tsheb yog qhov yooj yim heev.
Ua rau muaj kev ua haujlwm tsis zoo ntawm EGR system
Tsuas muaj ob qho laj thawj ntawm kev ua haujlwm tsis zoo ntawm USR valve thiab lub kaw lus tag nrho - cov pa roj tsawg dhau los ntawm lub cev thiab cov pa roj ntau dhau los ntawm lub cev. Nyob rau hauv lem, yog vim li cas rau qhov no tej zaum yuav yog cov nram qab no phenomena:
- Ntawm EGR valve qia carbon deposits daim ntawv. Qhov no tshwm sim rau tej yam ntuj tso. Raws li tau hais los saum no, cov pa pa tawm dhau los ntawm nws, thiab cov kua qaub nyob ntawm cov phab ntsa valve, suav nrog cov qia. Qhov no tshwm sim tshwj xeeb tshaj yog aggravated nyob rau hauv tej yam kev mob thaum lub tshuab ua hauj lwm nyob rau hauv nruj tej yam kev mob. xws li, nrog kev hnav ntawm lub cav combustion sab hauv, qhov nce ntawm cov crankcase gases, siv cov roj tsis zoo. Tom qab kuaj xyuas lub valve, nws yog ib txwm pom zoo kom ntxuav lub qia nrog ib tug carb cleaner los yog zoo li degreasing nqus tsev vacuum. Feem ntau, qee cov kuab tshuaj (piv txwv li, tus ntsuj plig dawb) los yog ntshiab acetone yog siv rau qhov no. Koj tuaj yeem siv roj av lossis roj av.
- Diaphragm leakage EGR valve. Qhov kev puas tsuaj no ua rau qhov tseeb tias lub valve tsis qhib tag nrho thiab tsis kaw, uas yog, cov pa pa tawm los ntawm nws, uas ua rau cov txiaj ntsig tau piav qhia saum toj no.
- Cov channel ntawm EGR system yog coked. Qhov no kuj ua rau cov pa pa thiab cua tsis tau tshuab los ntawm lawv ib txwm. Coking tshwm sim vim qhov pom ntawm cov kua qaub ntawm cov phab ntsa ntawm lub valve thiab / lossis cov channel uas cov pa pa tawm mus.
- Lub EGR system tau raug muffled tsis raug. Qee tus tswv tsheb uas niaj hnub ntsib qhov tseeb tias vim yog kev siv ICE qhov system poob lub zog, lawv tsuas tua lub EGR valve. Txawm li cas los xij, yog tias qhov kev txiav txim siab tau ua tiav, qhov no yuav tsum ua kom raug, txwv tsis pub lub ntsuas cua huab cua yuav tau txais cov ntaub ntawv hais tias huab cua loj heev tshwm sim. Qhov no yog qhov tseeb tshwj xeeb tshaj yog thaum yuav lub tsheb siv, thaum tus tswv tshiab tsis paub tias EGR valve yog ntsaws rau ntawm lub tsheb. Yog hais tias lub tsheb yog nruab nrog xws li ib tug system, ces nws yog advisable mus nug tus qub lub tsheb tswv txog nws tus mob, thiab nug yog hais tias lub USR system twb muffled kiag li lawm.
- Npog EGR valve thaum nws kaw thiab/los yog qhib. Muaj ob txoj kev xaiv tau ntawm no. Thawj yog lub sensor nws tus kheej yog faulty, uas tsis tuaj yeem xa cov ntaub ntawv raug mus rau chav tswj hluav taws xob. Qhov thib ob yog teeb meem nrog lub valve nws tus kheej. Nws yog tsis qhib kiag li los yog tsis kaw kiag li. Qhov no feem ntau yog vim muaj qhov loj ntawm cov quav rau ntawm nws, tsim los ntawm cov roj combustion.
- EGR valve jerky. Lub solenoid ua hauj lwm yuav tsum muab ib tug du reversal ntawm lub qia, thiab raws li, lub sensor yuav tsum tau ntes smoothly hloov cov ntaub ntawv ntawm txoj hauj lwm ntawm lub damper. Yog tias qhov kev hloov pauv tau tshwm sim sai sai, cov ntaub ntawv sib txuas tau xa mus rau lub khoos phis tawj, thiab lub kaw lus nws tus kheej tsis ua haujlwm kom raug nrog cov txiaj ntsig tau piav qhia saum toj no rau lub tshuab hluav taws xob sab hauv.
- Nyob rau hauv cov tsheb uas muaj kev txav valve stepper hluav taws xob tsav, tej zaum yog vim li cas dag precisely nyob rau hauv nws. uas yog, lub tshuab hluav taws xob yuav ua tsis tau (piv txwv li, luv luv-circuit winding, tsis ua haujlwm), lossis lub iav tsav yuav ua tsis tau (ib lossis ntau cov hniav ntawm nws tawg lossis tag nrho hnav).
USR system check
Lawm, ntawm cov qauv sib txawv thiab cov qauv ntawm cov tsheb, qhov chaw ntawm EGR sensor yuav txawv, txawm li cas los xij, raws li nws yuav, qhov kev sib dhos no yuav nyob ze rau ntawm qhov khoom noj. Tsawg feem ntau, nws yog nyob rau hauv lub tshuab nqus tsev los yog ntawm lub throttle block.
Hauv cov chaw nres tsheb, daim tshev yuav tsum pib nrog kev kuaj pom. Los ntawm thiab loj, muaj ob txoj hauv kev los kuaj xyuas EGR valve - nrog thiab tsis muaj nws dismantling. Txawm li cas los xij, nws tseem zoo dua los ua kom paub meej ntxiv nrog rau kev tshem tawm ntawm lub rooj sib txoos, txij li tom qab kev kuaj xyuas, yog tias lub valve yog clogged nrog deposits ntawm burnt roj, nws yuav tsum tau muab ntxuav ua ntej reinstalled. Yuav pib nrog, peb yuav txiav txim siab txog txoj hauv kev los kuaj xyuas yam tsis muaj kev rhuav tshem ib tus neeg.
Yuav ua li cas txheeb xyuas cov haujlwm ntawm EGR
Ua ntej ua daim tshev tag nrho, koj yuav tsum xyuas kom meej tias lub valve ua haujlwm txhua. Xws li daim tshev yog ua tiav theem pib.
Thaum nws yog ib qho tsim nyog los xyuas qhov kev pab cuam ntawm lub pneumatic valve, nws yog txaus los soj ntsuam cov hlab ntsha ntawm lub qia thaum lub sij hawm roj (ib tug neeg revs, qhov thib ob zoo). Los yog los ntawm nias lub membrane - qhov ceev yuav tsum sag. txhawm rau txheeb xyuas EGR solenoid valve, koj yuav tsum siv lub zog ncaj qha los ntawm lub roj teeb mus rau qhov ntxiv thiab rho tawm ntawm cov khoom sib txuas, thaum mloog txhua qhov nias. Tom qab ua tiav cov kauj ruam no, koj tuaj yeem mus rau qhov kev txheeb xyuas ntxaws ntxiv ntawm EGR.
Nias lub valve
Nyob rau hauv lub combustion engine khiav ntawm idle, koj yuav tsum tau me ntsis nias ntawm daim nyias nyias. Nyob ntawm cov qauv tshwj xeeb ntawm lub valve, nws tuaj yeem nyob hauv ntau qhov chaw. Piv txwv li, nyob rau hauv lub nrov tsheb Daewoo Lanos, koj yuav tsum nias nyob rau hauv lub phaj, nyob rau hauv nws muaj cutouts nyob rau hauv lub cev, los ntawm uas koj muaj peev xwm nias rau ntawm daim nyias nyias. Ntawd yog, nias tshwm sim tsis yog ntawm daim nyias nyias, txij li nws tau tiv thaiv los ntawm lub cev, tab sis ntawm qhov ntawm lub cev uas nyob rau saum nws.
Yog hais tias, nyob rau hauv tus txheej txheem ntawm nias lub teev, lub cav ceev dipped thiab nws pib "cua" (qhov ceev pib poob), qhov no txhais tau hais tias lub valve lub rooj yog nyob rau hauv zoo, thiab los ntawm loj, tsis muaj dab tsi yuav tsum tau. kho, tshwj tsis yog rau kev tiv thaiv lub hom phiaj (ua li no, nws yuav tsim nyog los rhuav tshem EGR valve thiab nyob rau tib lub sijhawm kom ua tiav kev kuaj mob ntxiv ntawm chav tsev). Txawm li cas los xij, yog tias tsis muaj dab tsi tshwm sim tom qab qhov kev nias, thiab lub tshuab hluav taws xob sab hauv tsis poob nrawm, qhov no txhais tau hais tias lub membrane tsis nruj, uas yog, EGR system xyaum tsis ua haujlwm. Raws li, nws yog ib qho tsim nyog yuav tsum rhuav tshem USR valve thiab ua cov kev kuaj mob ntxiv ntawm lub xeev ntawm ob lub valve nws tus kheej thiab lwm yam ntawm lub cev.
Xyuas lub valve
Raws li tau hais los saum no, qhov chaw ntawm lub valve tuaj yeem sib txawv hauv cov tsheb sib txawv, txawm li cas los xij, feem ntau nws tau nruab rau hauv qhov chaw ntim khoom. Piv txwv li, ntawm lub tsheb Ford Escape 3.0 V6, nws yog ntsia rau ntawm ib tug hlau yeeb nkab los ntawm lub intake manifold. Lub valve qhib vim lub tshuab nqus tsev los ntawm solenoid. Ib qho piv txwv ntawm kev txheeb xyuas ntxiv yuav raug muab tso rau hauv lub cav combustion sab hauv ntawm lub tsheb tau teev tseg.
Txhawm rau txheeb xyuas qhov ua tau zoo ntawm EGR valve, nws yog qhov txaus los txiav lub hose los ntawm lub valve ntawm qhov ceev ntawm lub cav combustion, los ntawm lub tshuab nqus tsev (lub tshuab nqus tsev) nkag. Yog tias muaj lub tshuab nqus tsev twj tso kua mis nyob rau hauv nominal accessibility, ces koj tuaj yeem txuas nws mus rau lub qhov valve thiab tsim lub tshuab nqus tsev. Yog tias lub valve ua haujlwm, lub tshuab hluav taws xob sab hauv yuav pib "cuam tshuam" thiab twitch, uas yog, nws qhov nrawm yuav pib poob. Hloov lub tshuab nqus tsev twj, koj tuaj yeem txuas lwm lub hose thiab tsim lub tshuab nqus tsev yooj yim los ntawm kev nqus cua nrog koj lub qhov ncauj. Cov kev tshwm sim yuav tsum yog tib yam. Yog hais tias lub combustion engine tseem ua hauj lwm ib txwm, ces lub valve feem ntau yuav faulty. Nws raug nquahu kom rhuav tshem nws kom ua tiav kev kuaj mob kom ntxaws. Ua li ntawd, nws yuav tsum tau kho ntxiv tsis yog ntawm nws lub rooj, tab sis nyob rau hauv cov xwm txheej ntawm lub khw kho tsheb (chaw nres tsheb).
Xyuas lub solenoid
Lub solenoid yog ib qho hluav taws xob tiv thaiv uas tso cai rau tam sim no ntws los ntawm nws. Lub solenoid hloov qhov voltage dhau los ntawm nws siv pulse-width modulation (PWM). Lub zog hloov pauv thaum lub sijhawm ua haujlwm, thiab qhov no yog lub teeb liab siv lub tshuab nqus tsev rau EGR valve. Thawj qhov yuav tsum tau ua thaum kuaj xyuas lub solenoid yog kom paub tseeb tias lub tshuab nqus tsev muaj lub tshuab nqus tsev zoo. Peb muab ib qho piv txwv ntawm kev pov thawj rau tib lub tsheb Ford Escape 3.0 V6.
Thawj qhov uas yuav tsum tau ua yog tshem tawm cov raj me me nyob rau hauv qab ntawm lub solenoid, tom qab ntawd koj yuav tsum pib lub cav combustion sab hauv. Thov nco ntsoov tias cov raj yuav tsum tau muab tshem tawm kom zoo kom tsis txhob tawg cov fittings uas lawv haum! Yog hais tias lub tshuab nqus tsev ntawm ib qho ntawm cov hlab yog nyob rau hauv kev txiav txim, ces nws yuav hnov, nyob rau hauv heev mob, koj muaj peev xwm muab koj tus ntiv tes rau ntawm lub raj. Yog tias tsis muaj lub tshuab nqus tsev, kev kuaj mob ntxiv yog tsim nyog. Txhawm rau ua qhov no, nws tseem yuav tsim nyog los rhuav tshem USR valve ntawm nws lub rooj rau kev kuaj mob ntxiv.
Tom qab ntawd, nws yog ib qho tsim nyog los xyuas qhov hluav taws xob, uas yog, nws yog ib qho tsim nyog los xyuas lub hwj chim ntawm lub solenoid. Txhawm rau ua qhov no, koj yuav tsum tshem tawm cov nti los ntawm cov txheej txheem teev tseg. Muaj peb lub xov hlau - teeb liab, lub zog thiab hauv av. Siv lub multimeter hloov mus rau DC voltage ntsuas hom, koj yuav tsum tau xyuas lub hwj chim. Ntawm no yog ib qho kev sojntsuam ntawm lub multimeter yog muab tso rau ntawm kev sib cuag, qhov thib ob - hauv av. Yog tias muaj lub zog, lub multimeter yuav qhia tus nqi ntawm cov khoom siv hluav taws xob txog li 12 volts. Nyob rau tib lub sijhawm, nws tsim nyog xyuas qhov kev ncaj ncees ntawm cov xaim impulse. Qhov no kuj tuaj yeem ua tiav siv lub tshuab multimeter, tab sis hloov mus rau hom "dialing". Ntawm cov ntawv teev tseg Ford Escape 3.0 V6 nws muaj cov kab mob ntshav qab zib, thiab ntawm ECU cov tswv yim nws muaj tus lej 47 thiab tseem muaj cov kab mob ntshav qab zib. Qhov zoo tshaj plaws, tag nrho cov xov hlau yuav tsum zoo thiab tsis muaj kev tiv thaiv. Yog tias cov xov hlau tawg, ces lawv yuav tsum tau hloov nrog cov tshiab. Yog hais tias lub rwb thaiv tsev puas lawm, ces koj tuaj yeem sim insulate nws nrog hluav taws xob daim kab xev los yog cua sov shrink daim kab xev. Txawm li cas los xij, qhov kev xaiv no tsuas yog tsim nyog yog tias qhov kev puas tsuaj me me.
Tom qab ntawd, koj yuav tsum xyuas qhov tseeb ntawm kev xaim ntawm lub solenoid nws tus kheej. Ua li no, koj tuaj yeem hloov lub multimeter mus rau hom txuas ntxiv lossis ntsuas hluav taws xob tsis kam. Tom qab ntawd, nrog ob qhov kev sojntsuam, ntsig txog, txuas mus rau ob qhov kev tawm ntawm cov xov hluav taws xob solenoid. Tus nqi tsis kam rau cov khoom siv sib txawv yuav txawv, tab sis Ua li ntawd, nws yuav tsum txawv ntawm xoom thiab los ntawm infinity. Txwv tsis pub, muaj luv luv Circuit Court lossis winding so, feem.
Tshawb xyuas EGR sensor
Lub luag haujlwm ntawm lub sensor yog sau qhov sib txawv ntawm lub siab nyob rau hauv ib qho thiab lwm qhov ntawm lub valve, feem, nws tsuas yog xa cov ntaub ntawv mus rau lub computer txog txoj hauj lwm ntawm lub valve - yog nws qhib los yog kaw. Ua ntej ntawm tag nrho cov, koj yuav tsum tau xyuas lub xub ntiag ntawm lub hwj chim ntawm nws.
Hloov lub multimeter mus rau DC voltage ntsuas hom. Txuas ib qho ntawm cov probes mus rau xov tooj 3 ntawm lub sensor, thiab qhov thib ob sojntsuam mus rau hauv av. tom ntej no koj yuav tsum pib lub cav. Yog tias txhua yam zoo li qub, ces qhov voltage ntawm ob qhov kev sojntsuam yuav tsum sib npaug li 5 volts.
Tom ntej no koj yuav tsum tau xyuas qhov voltage ntawm lub impulse hlau No.1. Nyob rau hauv ib lub xeev thaum lub combustion engine tsis sov li (EGR system tsis ua hauj lwm), qhov voltage ntawm nws yuav tsum yog hais txog 0,9 Volts. Koj tuaj yeem ntsuas nws tib yam li lub zog xaim. Yog tias lub tshuab nqus tsev muaj, ces lub tshuab nqus tsev tuaj yeem siv rau lub valve. Yog hais tias lub sensor ua hauj lwm, thiab nws yuav kho qhov tseeb, ces cov zis voltage ntawm lub impulse hlau yuav maj mam nce. Ntawm qhov voltage ntawm kwv yees li 10 volts, lub valve yuav tsum qhib. Yog hais tias thaum lub sij hawm ntsuas qhov voltage tsis hloov los yog hloov tsis-linearly, ces, feem ntau yuav, lub sensor yog tsis muaj kev txiav txim thiab nws yog tsim nyog los nqa tawm nws cov kev kuaj mob ntxiv.
Yog tias lub tsheb nres tom qab lub tshuab ua haujlwm luv luv, tom qab ntawd koj tuaj yeem tshem tawm USR valve thiab ntswj nws thiab tshem nws rov qab los saib cov tshuaj tiv thaiv ntawm lub tshuab hluav taws xob sab hauv - yog tias koj tshem lub valve ntawm lub crankcase, cov pa taws ntau tawm los. thiab lub cav combustion sab hauv pib ua hauj lwm sib npaug, qhov cua tshuab los yog lub valve nws tus kheej yog faulty. Yuav tsum tau kuaj xyuas ntxiv ntawm no.
Disassembly check
Nws yog qhov zoo tshaj los xyuas EGR valve thaum nws raug tshem tawm. Qhov no yuav ua rau pom kev thiab nrog kev pab ntawm cov cuab yeej ntsuas nws tus mob. Thawj qhov yuav tsum tau ua yog xyuas seb nws puas ua haujlwm. Nyob rau hauv qhov tseeb, lub valve yog ib tug solenoid (coil), uas yuav tsum tau muab nrog 12 volts ntawm ncaj qha tam sim no, raws li nyob rau hauv hluav taws xob Circuit Court ntawm lub tsheb.
Thov nco ntsoov tias tus tsim ntawm lub li qub yuav txawv, thiab raws li, cov xov tooj ntawm kev sib cuag uas yuav tsum tau muaj zog kuj yuav txawv, raws li, tsis muaj universal tov ntawm no. Piv txwv li, rau lub tsheb Volkswagen Golf 4 APE 1,4, muaj peb pins ntawm lub valve nrog cov lej 2; 4; 6. Qhov hluav taws xob yuav tsum tau siv rau cov terminals naj npawb 2 thiab 6.
Nws raug nquahu kom muaj AC voltage qhov ntawm tes, txij li hauv kev xyaum (hauv lub tsheb) kev tswj qhov hluav taws xob sib txawv. Yog li, nyob rau hauv ib txwm lub xeev, lub valve pib qhib ntawm 10 volts. Yog tias koj tshem tawm 12 volts, ces nws yuav cia li kaw (cov qia yuav nkag mus rau hauv). Nrog rau qhov no, nws tsim nyog xyuas qhov hluav taws xob tsis kam ntawm lub sensor (potentiometer). Nrog rau kev ua haujlwm sensor ntawm lub valve qhib, qhov kev tawm tsam ntawm tus pins 2 thiab 6 yuav tsum yog li 4 kOhm, thiab ntawm 4 thiab 6 - 1,7 kOhm. Nyob rau hauv qhov chaw kaw ntawm lub valve, qhov sib thooj ntawm tus pins 2 thiab 6 yuav yog 1,4 kOhm, thiab ntawm 4 thiab 6 - 3,2 kOhm. Rau lwm lub tsheb, ntawm chav kawm, qhov tseem ceeb yuav txawv, tab sis lub logic yuav nyob twj ywm tib yam.
Nrog rau kev kuaj xyuas kev ua haujlwm ntawm lub solenoid, nws tsim nyog xyuas cov txheej txheem ntawm lub valve. Raws li tau hais los saum toj no, cov kua qaub (cov khoom ntawm cov roj combustion) accumulates ntawm nws qhov chaw nyob rau lub sijhawm, nyob ntawm nws phab ntsa thiab ntawm tus pas nrig. Vim li no, kev txav du ntawm lub valve thiab qia tuaj yeem raug cuam tshuam. Txawm hais tias tsis muaj ntau cov kua qaub nyob ntawd, nws tseem pom zoo rau kev tiv thaiv kom ntxuav nws sab hauv thiab tawm nrog lub tshuab ntxhua khaub ncaws.
Kev txheeb xyuas software
Ib txoj hauv kev ua tiav thiab yooj yim tshaj plaws rau kev kuaj mob EGR yog siv software nruab rau ntawm lub laptop (ntsiav tshuaj lossis lwm yam khoom siv). Yog li, rau cov tsheb tsim los ntawm VAG kev txhawj xeeb, ib qho ntawm cov kev kuaj mob nrov tshaj plaws yog VCDS lossis hauv Lavxias - "Vasya Diagnostic". Cia peb saib ceev ceev ntawm EGR kuaj algorithm nrog cov software no.
EGR tshawb xyuas hauv Vasya Diagnost program
Thawj kauj ruam yog txuas lub laptop mus rau ICE electronic control unit thiab khiav qhov kev pab cuam tsim nyog. ces koj yuav tsum nkag mus rau ib pab pawg hu ua "ICE Electronics" thiab cov ntawv qhia zaub mov "Custom Groups". Ntawm lwm tus, nyob rau hauv qab ntawm daim ntawv teev npe channel, muaj ob txoj kab uas suav nrog 343 thiab 344. Thawj qhov hu ua "EGR Vacuum Regulator Solenoid Valve; actuation" thiab qhov thib ob yog "EGR Solenoid Valve; tus nqi tiag".
Hauv kev xyaum, qhov no txhais tau hais tias raws li channel 343, ib tus tuaj yeem txiav txim siab ntawm tus nqi txheeb ze ECU txiav txim siab qhib lossis kaw EGR valve hauv kev xav. Thiab channel 344 qhia ntawm qhov tseeb qhov tseem ceeb ntawm lub valve ua haujlwm. Qhov zoo tshaj plaws, qhov sib txawv ntawm cov ntsuas no hauv dynamics yuav tsum tsawg. Raws li, yog tias muaj qhov sib txawv tseem ceeb ntawm qhov tseem ceeb hauv ob txoj kev qhia, ces lub valve yog ib feem ntawm kev txiav txim. Thiab qhov ntau dua qhov sib txawv ntawm cov ntawv nyeem sib xws, lub valve puas ntau dua. Yog vim li cas rau qhov no yog tib yam - ib tug qias neeg valve, daim nyias nyias tsis tuav, thiab hais txog. Raws li, siv cov cuab yeej software, nws muaj peev xwm ntsuas qhov xwm txheej ntawm EGR valve yam tsis muaj dismantling los ntawm nws lub rooj zaum ntawm lub cav combustion.
xaus
Kev tshuaj xyuas EGR system tsis yog qhov nyuaj tshwj xeeb, thiab txawm tias tus tsav tsheb tshiab tuaj yeem ua tau. Yog tias lub valve tsis ua haujlwm rau qee yam, thawj qhov yuav tsum tau ua yog luam theej duab ECU nco rau qhov tsis raug. nws kuj tseem pom zoo kom dismantle thiab ntxuav nws. Yog hais tias lub sensor tawm ntawm kev txiav txim, nws tsis kho, tab sis hloov nrog ib tug tshiab.
