https://www.jonyautoparts.com/egr-valve/
Thaum peb tham txogEGRsystem, peb nkag siab tias nws yog cov pa pa rov ua haujlwm system. Los ntawm kev qhia cov pa tso rau hauv lub combustion chamber, nws tuaj yeem txo qhov siab tshaj plaws ntawm lub cav thiab ua tiav lub hom phiaj ntawm kev txo qis NOx emissions.
Lub tsheb Diesel siv cov txheej txheem sab nraud, uas yog, cov yeeb nkab txuas nrog ntawm cov yeeb nkab tso tawm thiab cov yeeb nkab nkag, thiab lub valve tau nruab rau hauv cov yeeb nkab los tswj cov pa tso pa nkag mus.Nws tuaj yeem pom tias EGR valve yog qhov tseem ceeb. tivthaiv ntawm tag nrho cov system, thiab yuav ua li cas kom raug tswj thiab saib xyuas nws yog txoj kev loj hlob ntawm EGR system.
EGR: luv rau Exhaust Gas Re-circulation, cov txheej txheem (los yog txoj kev) ntawm re-hluav taws xob lub internal combustion engine los ntawm cais ib co ntawm cov Exhaust Gas thiab qhia nws mus rau sab intake.Lub hom phiaj tseem ceeb yog txo cov nitrogen oxide (NOx. ) nyob rau hauv cov pa tso pa thiab nce cov roj noj tus nqi thaum sib koom ib feem ntawm lub load.
EGR Ua Haujlwm Mechanism
Exhaust GasRe-circulation, los yog EGR, yog ib qho system uas xa ib feem me me ntawm cov pa uas tsim los ntawm lub tshuab hluav taws xob lossis roj av rov qab mus rau lub tog raj kheej.
Cov pa hluav taws xob rov ua dua yuav ua rau cov txheej txheem combustion qeeb vim tias lawv tsis muaj zog, uas yog, tus nqi hluav taws xob yuav qeeb qeeb thiab cov txheej txheem tsim cov txheej txheem siab hauv chav combustion yuav qeeb, uas yog qhov laj thawj tseem ceeb rau kev txo cov nitrogen oxides.
Tsis tas li ntawd, kev txhim kho cov pa hluav taws xob rov ua haujlwm yuav txo qis tag nrho cov pa pa tawm (MASS ntws), yog li tag nrho cov pa phem tawm hauv cov pa tawm hauv cov pa tawm yuav raug txo qis.
Lub hom phiaj ntawmEGRLub kaw lus yog txhawm rau txhim kho cov pa roj rov ua kom zoo dua ntawm txhua qhov chaw ua haujlwm, yog li xyuas kom meej tias cov txheej txheem combustion yog ib txwm nyob rau hauv qhov kev pom zoo, thiab thaum kawg los xyuas kom meej tias cov pa phem ntawm cov paug tawm tsawg heev.
Vim tias qhov kev hloov pauv ntawm cov pa tso pa rov tuaj yeem ua rau muaj qhov cuam tshuam rau ntawm cov pa phem sib txawv, qhov kev hu ua qhov xwm txheej zoo feem ntau yog kev sib haum xeeb kom ua tiav qhov kev pom zoo tag nrho ntawm cov pa phem.
Piv txwv li, thaum nce cov pa rov ua dua tshiab muaj txiaj ntsig zoo ntawm kev txo qis nitrogen oxide (NOx) emissions, nws kuj muaj qhov cuam tshuam tsis zoo rau kev nce qib ntawm cov khoom me me thiab lwm cov pa phem.
▎ Tswj Txoj Cai
Cov kev cai ntawm EGR yog qhov sib txawv rau cov cav sib txawv ua haujlwm.Yuav kom lub EGR system ua haujlwm zoo dua, nws yog ib qho tsim nyog los txwv cov pa roj uas koom nrog EGR.
Nrog rau qhov nce ntawm kev thauj khoom, tus nqi ntawm EGR nce ntxiv thiab tuaj yeem ncav cuag tus nqi zoo.
Ntawm qhov ceev ceev thiab qis load, NOx emission concentration yog tsawg, yog li EGR tsis yog ua los xyuas kom meej combustion.
Nyob rau hauv cov txheej txheem ntawm cua sov, lub cav kub yog tsawg thiab NOx emission concentration kuj tsawg. Txhawm rau tiv thaiv EGR los ntawm kev ua phem rau cov txheej txheem combustion, EGR tsis ua.
EGR tsis yog nqa tawm ntawm kev thauj khoom siab, kev kub ceev lossis tag nrho throttle kom ntseeg tau tias lub zog ua haujlwm ntawm lub cav.
Thaum nrawm, EGR ua lub luag haujlwm hauv txoj kev hloov pauv kom ntseeg tau tias lub tsheb nrawm thiab qhov tsim nyog ua kom huv.
▎ Tswj hom
Raws li cov saum toj noEGRCov qauv tsim, EGR yuav tsum tau tswj thiab hloov kho kom daim ntawv thov ntawm EGR hauv lub cav tuaj yeem ua tiav cov txiaj ntsig xav tau.Muaj ntau txoj hauv kev los tswj thiab tswj EGR, uas tuaj yeem faib los ntawm ntau lub kaum ntse ntse raws li nws cov yam ntxwv tseem ceeb.
https://www.jonyautoparts.com/egr-valve/
