I. Cov ntsiab lus tseem ceeb thiab qhov chaw teeb tsa
Intake Throttle Valve (ITV)
- Txoj hauj lwm: Pem hauv ntej kawg ntawm cov khoom siv manifold, noj sab ntawm lub turbocharger
- Tsav: Hluav taws xob npauj npaim valve
- Nruab nrab: huab cua ntshiab
2. Lub teb chaws VI tso pa tawm throttling valve (ETV, post- kho throttling valve)
- Txoj hauj lwm: Qhov hluav taws xob ntawm lub turbocharger, pem hauv ntej kawg ntawm DOC (ua ntej- ntu ua haujlwm)
- Tsav: Servo lub cev muaj zog nrog txoj haujlwm tawm tswv yim
- Nruab Nrab: Siab- qhov kub thiab txias tso pa roj, cov ntsiab lus tseem ceeb ntawm kev tswj xyuas thermal rau kev tshaj tawm- kev kho mob ntawm tus qauv thib rau emission
3. Ib txwm tso tseg nres valve (mechanical nres nres)
- Txoj hauj lwm: Turbine qhov hluav taws xob, sab pem hauv ntej ntawm muffler, tom qab DOC / cov tsheb qub yam tsis muaj tom qab- kho
- Tsav: Lub tog raj kheej pneumatic (cua thawb npauj npaim valve), tsis muaj cov lus qhia meej txog txoj haujlwm
- Nruab nrab: Cov pa pa tawm, tsuas yog rau qis qis qis - nrawm nrawm
II. Qhov sib txawv ntawm Cov Cai Ua Haujlwm Tseem Ceeb
Intake throttle valve (ITV)
Txo qhov nkag mus, thiab qhov ntim ntawm lub tog raj kheej yuav txo qis:
1. Lub tshuab nqus tsev nqus tau nce, lub piston qhov nqus tau zoo nce, yog li ua kom lub cav thauj khoom thiab nce lub tog raj kheej kub.
2. Cov ntsiab lus ntawm cov pa oxygen hauv lub tog raj kheej txo qis, pab txhim kho qhov cua sov.
3. Nws yog tsuas yog siv rau kev pib txias thiab rov tsim kho cua sov ntawm lub teeb-lub luag haujlwm Euro VI diesel / roj av tsheb.
Exhaust Throttle Valve (ETV) (Mainstream rau National VI tus qauv)
Txo qhov tso pa tawm qhov loj los tsim cov pa rov qab siab:
1. Lub tso pa tawm tuaj yeem nce ntxiv, cov twj tso kua mis poob ntawm lub cav nce, thiab cov cua kub ntau yog generated;
2. Lub siab sib txawv boosts EGR txaus tus nqi, optimizing NOx;
3. Precise thiab tas mus li hloov ntawm qhov qhib degree, noj rau hauv tus account cua sov, regeneration, thiab me ntsis braking.
Laus -fashioned pneumatic nres valve
Tsuas muaj ob qhov chaw: tag nrho rau lossis tag nrho tawm, tsis muaj kev hloov kho nruab nrab.
1. Ua tiav kaw cov yeeb nkab tso tawm, ua rau lub zog rov qab loj heev uas ua rau lub cav tsis kam;
2. Tsuas yog siv rau deceleration ntawm qhov ntev downhill, tsis muaj zog rau kub nce los yog EGR kev cai.
III. Function Sib piv Table
Intake Throttle Valve (ITV)
1. Lub compressor ceev ceev nce qhov kub hauv lub tog raj kheej thiab hauv cov pa tawm.
2. DPF regeneration pab kom kub nce.
3. Idle ceev stability tswj.
4. Me ntsis txo cov pa oxygen hauv cov pa kom tsawg, pab txo NOx.
5. Nws tsis muaj peev xwm nres nres.
National VI Exhaust throttle Valve ETV (ntau hom)
1. Txias lub cav thiab ua kom sov kom sai sai coj DOC/SCR mus rau qhov kub thiab txias;
2. Active regeneration ntawm DPF rau ruaj khov kub tswj (core function);
3. Ua kom lub zog rov qab, nce EGR txaus tus nqi, thiab txo NOx emissions;
4. Txhim kho turbine teb ntawm qhov ceev ceev thiab txo qis lag luam;
5. Rau cov tsheb nruab nrab thiab lub teeb uas tsis muaj kev ywj pheej nres nres, nws tuaj yeem siv los hloov thiab ua kom qeeb qeeb;
6. Nruam thiab meej kaw -loop tswj.
Tsoos pneumatic nres valve (ib leeg ua haujlwm)
1. Lub cav ua haujlwm ntawm qhov txo qis tsuas yog nyob rau hauv qhov chaw qis qis kom txo qis qhov hnav ntawm cov pawm nres.
2. Nws tsis muaj kev tswj xyuas qhov kub thiab txias, tsis muaj DPF kev pab tsim kho, thiab tsis tuaj yeem kho EGR.
3. Tsuas muaj ob lub zog, thiab kev tswj qhov kub tsis tuaj yeem ua haujlwm ib nrab.
IV. Qhov sib txawv ntawm Kev Ua Haujlwm Cov Txheej Txheem Logic
1. Txias pib
ITV thiab ETV me ntsis txo lub cav tso zis kom sov; lub qub -fashioned pa nres valve tseem qhib tag nrho thiab tsis koom.
2. Active regeneration ntawm DPF
ETV me ntsis throttles los ua lub zog tseem ceeb, nrog ITV muab kev pab txhawb nqa; lub qub -fashioned pa nres valve tsis cuam tshuam.
3. Ib txwm hnyav- thauj khoom nce toj
Tag nrho peb qhov qhib tag nrho kom tsis txhob muaj hluav taws xob poob thiab siv roj ntau ntxiv los ntawm throttling.
4. Deceleration ntawm qhov chaw nqes hav ntev
- Nrog rau cov qub -fashioned pa nres hom: Lub pneumatic valve ncaj qha kaw lub brakes kiag li;
- Lub teeb yuag Euro VI qauv tsis muaj kev ywj pheej nres nres: ETV txo qhov qhib kom ua tiav qhov nrawm;
- ITV tseem qhib tag nrho thiab tsis koom nrog braking.
5. Siab -load EGR mob
Kaw lub ETV txo qis rov qab siab thiab nce EGR txaus tus nqi; lub ITV thiab cov pa hluav taws xob qub tsis muaj qhov cuam tshuam no.
V. Qhov txawv ntawm Cov Qauv thiab Kev Tswj
1. Intake Throttle Valve (ITV)
Fais lub cev muaj zog tsav, txoj hauj lwm tawm tswv yim, stepless hloov; Tsawg ua haujlwm kub, tsis tshua muaj carbon deposition thiab jamming.
2. Exhaust Throttle Valve (ETV)
Ua haujlwm nyob rau hauv siab - qhov kub thiab txias ib puag ncig, hluav taws xob lub cev muaj zog nrog kub tsis kam, siab - qhov ntsuas qhov tseeb, ECU kaw - voj calibration; nquag rau carbon deposition, coking thiab jamming, siab -frequency fault qhov chaw rau tus thib rau emission standard.
3. Laus -fashioned Exhaust Nres Valve
Pneumatic lub tog raj kheej tsav, tsis muaj txoj haujlwm tawm tswv yim, tsuas yog ob txoj haujlwm ntawm thiab tawm; qauv yooj yim, ruaj khov, nrog ib qho kev ua haujlwm.
VI. Classification ntawm Fault Consequences
1. Lub qhov nqus nqus valve yog daig hauv qhov chaw qhib.
Lub tsheb yuav siv sij hawm ntev los ua kom sov, qhov rov tsim dua qhov cua sov tsis txaus, qee zaus DPF rov tsim dua tsis ua haujlwm, thiab qhov torque txwv qhov tshwm sim tsawg.
2. Lub tso pa tawm valve ETV yog daig nyob rau hauv txoj hauj lwm qhib.
Tom qab- kev kho cua sov yog qhov nyuaj, DPF feem ntau tsis tuaj yeem rov tsim dua tshiab, qhia txog kev ua haujlwm ntawm DPF tsawg, thiab ntev - lub sij hawm torque txwv; EGR ntws tsis txaus, thiab NOx tshaj tus qauv.
ETV daig hauv qhov chaw kaw
Lub siab rov qab siab dhau lawm, lub zog tsis muaj zog, kev siv roj ntau ntxiv, thiab qhov tso cua sov siab dhau lawm thiab ua rau DOC / DPF cov cab kuj puas.
3. Lub qub nres nres valve yog daig nyob rau hauv qhov chaw kaw.
Lub braking kuj tseem nyob rau thaum tsav tsheb downhill, ib txwm tsav lub zog tsis zoo, thiab qhov kub thiab txias yog siab; tsis muaj emissions - cuam tshuam cov lej txhaum.
VII. Txoj kev yooj yim tshaj plaws kom paub qhov txawv
1. Ncua lub tog raj kheej valve: tswj cov cua nkag, tsuas yog siv rau cua sov thiab tsis yog rau braking;
2. Euro VI tso pa tawm valve (ETV): Ib tug ntau-functional valve, siv rau cua sov, regeneration, kho EGR, thiab kuj rau me ntsis braking;
3. Laus -fashioned tso pa nres valve: Tshwj xeeb, rau downhill braking, tswj tsis tau kub los yog kho emissions.