Valve clearance and adjustment
Valve clearance and adjustment
Anonim

Nyob rau hauv ib lub cav combustion sab hauv, valve mechanisms yog siv los npaj cov pa roj ib txwm. Ib feem me me ntawm lub torque yog coj mus rau crankshaft tsav. Hauv cov txheej txheem cua sov, cov hlau muaj peev xwm nthuav dav. Yog li ntawd, qhov ntev ntawm lub cev muaj zog hloov. Qhov ntev ntawm lub sij hawm hais kuj hloov. Yog hais tias lub sij hawm tsav tsis muaj thermal valve clearance, ces thaum lub cav yog rhuab mus rau nws optimum khiav hauj lwm kub, li qub yuav tsis kaw nruj nreem. Vim li ntawd, lawv yuav tsis muab qhov nruj nruj.

yuav ua li cas kho valve clearance
yuav ua li cas kho valve clearance

Vim li no, kev ua haujlwm ntawm lub cav tuaj yeem ua rau tsis zoo. Tab sis tsis yog tag nrho. Lub neej ntawm cov li qub yog txo qis - cov npoo ntawm daim hlau feem ntau hlawv. Thaum lub sijhawm ua haujlwm ntawm lub valve, nws qhov chaw hnav tawm, thiab qhov sib txawv thermal nce. Qhov no ua rau lub suab nrov ua haujlwm ntawm lub cev muaj zog. Txhawm rau tiv thaiv qhov no tshwm sim, thiab lub cav ua haujlwm ib txwm uasmoothly thiab ntsiag to, nws yog ib qho tsim nyog yuav tau kho lub thermal clearance ntawm lub valve ib ntus. Rau qhov no, engineers tau muab lub tshuab tshwj xeeb lossis ntxhua khaub ncaws rau kev hloov kho.

Qhov tseem ceeb ntawm kev teeb tsa kev tshem tawm

Tom qab pib, lub cev muaj zog thiab tag nrho nws cov ntsiab lus sov thiab, raws li hauv qab no los ntawm lub tsev kawm ntawv chav kawm physics, nthuav dav. Tsis tas li ntawd, rubbing ntsiab hnav tawm rau ntuj tsim. Qhov no yuav tsum muaj qhov sib txawv ntawm qhov tseeb ntawm cov ntsiab lus ntawm lub sijhawm. Thiab qhov kev ncua deb uas muaj nyob nruab nrab ntawm lub cam ntawm lub camshaft thiab lub valve yog ib qho tseem ceeb tshaj plaws.

valve clearance
valve clearance

Thaum lub thermal clearance ntawm lub valve tsawg dua qhov tsim nyog, lub cev muaj zog yuav tsis tuaj yeem ua kom muaj peev xwm ua tau zoo tshaj plaws hauv nws los ntawm cov chaw tsim khoom. Qhov no yuav twv yuav raug hu ua dynamics thiab ceev yam ntxwv ntawm lub tsheb. Nyob rau tib lub sijhawm, cov khoom siv valve yuav overheat. Lawv cov ntug tau yaj lawm.

Yog tias qhov sib txawv nce ntxiv, tus tswv lub tsheb yuav hnov lub suab ntawm li qub. Nws yuav ploj mus thaum lub cav sov. Nyob deb deb, lub camshaft cam kais ntawm lub valve qia rocker es tsis txhob nias rau nws.

Sim rau tuning

Muaj qee qhov cim qhia tias lub valve tshem tawm tau teeb tsa tsis raug. Yog li, thawj cov tsos mob yog cov yam ntxwv ntawm lub suab nrov hauv thaj tsam ntawm lub tog raj kheej lub taub hau npog. Lwm qhov kos npe yog txo lub cav tso zis, thiab nrog nws siv roj siab.

Tsis tas li, kev hloov kho kev tshem tawm yog tsim nyog yog tias muaj kev kho ntawm cov tshuab xa tawm roj. Yuav tsum taukho yog tias qhov khoob qhov kawg tau teeb tsa ntau dua 20 txhiab mais dhau los.

thermal clearances ntawm vaz li qub
thermal clearances ntawm vaz li qub

Muaj lwm yam cim. Qhov no yog kev siv roj ntau ntxiv, kev txhaj tshuaj hauv lub muffler lossis kev noj cov khoom noj khoom haus, kev ua yuam kev hauv kev nplua nuj lossis ntshiv heev. Qhov xwm txheej ntawm lub txim hluav taws xob tseem yuav qhia rau koj txog qhov tsis raug thermal qhov sib txawv. Lawv yuav raug raided.

Kuv yuav tsum kho ntau npaum li cas?

Ntawm VAZ tsheb, raws li cov chaw tsim khoom cov cai, thermal valve clearances yuav tsum tau kho txhua txhua 45 txhiab kilometers. Tab sis feem ntau qhov kev xav tau ntawm kev tu ncua tshwm sim ua ntej. Cov kws tshaj lij pom zoo kom kho lub sijhawm sijhawm tsawg kawg tom qab 20 txhiab kilometers. Thiab yog tias lub cav khiav hauv qhov siab tshaj plaws, ces 15. Qhov ntsuas no kuj tau txiav txim siab los ntawm qhov zoo ntawm cov khoom seem rau cov tsheb hauv tsev, uas hnav tawm sai sai txawm tias nyob rau hauv kev ua haujlwm zoo tshaj plaws.

ntsuas qhov ntsuas cua sov

Koj tuaj yeem txheeb xyuas qhov xav tau ntawm kev hloov kho siv kev ntsuas. Kev kuaj xyuas cov thermal clearances ntawm lub li qub yog ib txwm nqa tawm ntawm lub cav txias. Txhawm rau ua qhov haujlwm, koj yuav xav tau lub ntsuas ntsuas thiab cov cuab yeej siv. Dab tsi suav nrog hauv cov khoom siv no yog nyob ntawm hom lifter valve.

thermal gap nyob rau hauv lub valve tsav
thermal gap nyob rau hauv lub valve tsav

Yog tias qhov khoob raug kho los ntawm kev siv lub hau ntswj, ces koj xav tau lub nplhaib, qhib qhov kawg thiab rauj. Yog tias cov valve hauv lub cav raug kho siv cov tshuab ntxhua khaub ncaws, ces yuav tsum tau yuav cov tshuab ntxhua khaub ncaws. Cov tom kawg yuav tsum muaj qhov sib txawv. Koj tseem yuav xav tau micrometer, ruber,lub tshuab ntxhua khaub ncaws thiab tweezers.

Txhim kho qhov kev tshem tawm, lub crankshaft yuav tsum tau tig kom lub cam ntawm lub camshaft rau qhov xaiv valve ntsib lwm txoj hauv kev nrog kev hwm rau cov kais dej. Lub tom kawg yog maj mam ntaus nrog rauj. Tom qab ntawd siv koj tus ntiv tes txhawm rau txhawm rau lub valve.

diesel valve clearance
diesel valve clearance

Tom ntej no, siv lub ntsuas ntsuas ntsuas ntsuas qhov sib txawv. Qhov no yuav tsum tau ua ntawm lub pusher thiab lub valve. Qhov ntsuas qhov ntsuas tau muab piv nrog cov nominal qhov ntev. Lawv tuaj yeem pom hauv tus tswv phau ntawv. Yog tus nqi sib txawv, ces yuav tsum tau kho.

valve clearance adjustment txheej txheem
valve clearance adjustment txheej txheem

Yuav ua li cas hloov cov thermal clearances ntawm lub cev muaj zog, qhov twg qhov kev hloov yog nqa tawm siv washers? Lub crankshaft yuav tsum tau tig kom lub cam ntawm lub camshaft yog saib nyob rau hauv kev sib raug zoo rau lub tappet. Tom ntej no, siv cov txheej txheem sojntsuam, qhov sib txawv yog ntsuas. Cov nqi raug muab piv nrog cov nqi nominal thiab kho yog tias tsim nyog.

tuning thev naus laus zis

Cia peb saib yuav ua li cas kho cov thermal tshem tawm ntawm cov li qub siv cov piv txwv ntawm VAZ xyaw. Thawj qhov uas yuav tsum tau ua yog teem lub piston ntawm thawj lub tog raj kheej mus rau qhov chaw tuag saum toj kawg nkaus. Qhov no ua tau yooj yim heev. Tig lub crankshaft nrog tus yuam sij kom txog rau thaum cov cim ntawm lub hnub qub camshaft coincide nrog lub crankshaft pulley thiab ntawm lub tog raj kheej thaiv. Tom qab ntawd, koj tuaj yeem pib kho. Lub tswv yim rau kev teeb tsa thermal valve clearances ntawm diesel xyaw zoo ib yam li qhov no.

valve clearance check
valve clearance check

Lub ntsuas ntsuas tau muab tso rau ntawm qhov chaw ua haujlwm ntawm lub cam thiab lub zog ntawm lub valve. Yog tias qhov kev sojntsuam mus nrog qhov nyuaj me ntsis, ces qhov sib txawv yog nyob rau hauv kev txiav txim. Yog tias nws tsis mus lossis nkag nruj dhau, ces qhov kev ncua deb yuav tsum tau kho. Txhawm rau ua qhov no, siv tus yuam sij 13 los tuav lub taub hau ntawm qhov kho qhov ntsia hlau. Nyob rau tib lub sijhawm, nrog tus yuam sij ntawm 17, lub ntsuas phoo raug tso tawm thiab lub ntsia liaj qhov rooj tig mus rau qhov xav tau. Twist kom txog thaum qhov xav tau tshem tawm. Tom qab ntawd koj yuav tsum tau kuaj xyuas qhov parameter, thiab tom qab ntawd kaw lub txiv ntoo. Yuav ua li cas thiaj li yuav tsum tau kho li qub? Peb yuav xav txog cov cuab yeej siv hauv qab no.

txheej txheem kho valve clearance

Ua ntej, koj yuav tsum kho lub yim lub valve, nyob rau ntawm plaub lub tog raj kheej. Tom qab nws - thib rau valve ntawm peb lub tog raj kheej. Qhov khoob yog adjustable nyob rau hauv khub. Rau txhua lub crankshaft, lub cav yog tig 180 degrees. Ntawm txhua qhov kev hloov tom ntej, qhov thib plaub thiab xya li qub, thawj thiab thib peb, thib tsib thiab thib ob, raws li, raug kho.

Kev ntsuas ntsuas

Txawm tias cov kws tshaj lij tsis tas yuav muaj qhov sib txawv ntawm thawj zaug. Yog li ntawd, kev tswj xyuas ntawm thermal clearances nyob rau hauv lub valve tsav yog yuav tsum tau. Yog tias muaj qhov tsis sib xws, koj yuav tsum tau teeb tsa nws dua. Tom qab xws li kev hloov kho, lub cav yuav khiav ntau ntsiag to, ruaj khov thiab yuav txaus siab rau nws tus tswv.

Yog li, peb pom tias qhov sib txawv ntawm qhov cua sov yog dab tsi thiab yuav ua li cas los teeb tsa nws nrog koj tus kheej tes.

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