Yuav ua li cas yog lub lapping ntawm li qub?

Yuav ua li cas yog compression? Qhov no siab nyob rau hauv lub combustion chamber nyob rau thaum xaus ntawm lub compression stroke. Nws yuav bled los ntawm cov piston rings los yog lub valve mechanism. Nyob rau hauv thawj cov ntaub ntawv, cov kho yuav tsuas yog ib tug hloov, thiab nyob rau hauv lub thib ob - nws yog tseem ua tau kom ua tsis tau nws. Xav txog cov piv txwv qhov teeb meem no xws engine WHA.

Ua ntej ntawm tag nrho cov, nws yuav tsum tau hais tias txoj kev ua no yog hu ua "lapping li qub". Thaum lub sij hawm lub lag luam, lub valve rooj tsim los ntawm ib tug deposit, uas tiv thaiv lawv los ntawm tag nrho kaw. Yog li, lapping valve txhob qhov teeb meem no. Yuav ua li cas los mus txiav txim yog dab tsi lawv yuav tsum tau lapping? Cov lus teb yog yooj yim. Yog hais tias koj poob lub compression nyob rau hauv lub thooj voos kheej kheej, ces lub lag luam no yog tsim nyog kiag li. Lub fact tias cov lapping ntawm li qub yuav tsum tau nyob rau hauv xws xyaw, ib qho chaw uas yog ib tug me ntsis depleted, thiab lub chav tsev yog tsis ua tag nrho ntawm lub zog.

Chiv siv ntawm lub rooj zaum thiab lub valve kis yog tsim vim hnav ntawm lub yav tas. Txij li thaum lub "Paj Rwb" nyob rau hauv lub nyob ze ntawm zoo zoo nkauj heev, nws thiaj li tau txais tawm ntawm ntug thiab tawg geometry haum. Ces unburned sib tov nkag mus rau hauv cov kis, uas yog tsuas yog lub coke nyob rau nws daim siv sia ntawm li qub, ua rau cov kis txawm ntau. Feem ntau, tej teeb meem tshwm sim mas nrog cov rav cua tsheb li qub raws li inlet "polished" khoom ntws. Tsis tas li ntawd, yog tsis muaj obstructions rau saum huab cua khiav, thiab thaum twg lub siab tshaj plaws kub siab heev, li qub yog nyob rau hauv ib tug kaw lub xeev.

Tam sim no ncaj qha rau ntawm yuav ua li cas ua tau lub sib tsoo li qub. Vaz txwv tsis pub cov tswv ntawm cov tsheb mus nqa tawm kev sib tsoo xyaum. Raws li lawv, nws yog yooj yim sua kom tus tsim nyog lub dag zog. Tab sis qhov tseeb hais tias lub dag zog yuam uas yog cia li tsis xav tau. Yog hais tias nws yog thov, lub eeb Stoch unevenly. Nyob rau hauv cov ntaub ntawv no, lub valve yuav tsis meej dlhos, uas ua rau cov tsos ntawm ib sab ntawm cov kis. Nws yog fraught nrog rau cov saum toj no yuav tshwm. Tsis tau lapping li qub laum tej zaum yuav tsis zoo li li sai tau los ntawm kev siv ib tug tshwj xeeb cov khoom siv.

Nws yog tsim nyob rau hauv peb ua sawv. Qhov no thiaj yog nyob rau hauv lub grain lapping compound, uas yog nyob rau hauv tus txheej txheem ntawm kev hloov. Yog hais tias lapping li qub tau nrog ib tug xyaum, ces nws yog clamped pin ntawm tib txoj kab uas hla li tus pas nrig. Ib kawg ntawm tus hose yog muab tso rau hauv nawj, thiab lwm yam - nyob rau valve. Ces lub rooj zaum siv thiab lubricated muab tshuaj txhuam, tom qab uas tshaaj me ntsis kev sib hloov ceev. Yog hais tias lawv yog heev me me, nws yog tsis txaus ntshai - kom me ntsis thaum lub sij hawm lub lag luam.

Yog hais tias lawv yog loj, muaj ib tug uas yuav ntawm overheating thiab saddles thiab li qub. Ces lawv yuav tsum tau yam ntxwv xiav sawb. Qhov no yog ib tug paub kos npe rau ntawm overheating. Tom qab thawj zaug ua yog erased muab tshuaj txhuam thiab ces txawm lig los plhws nrog cov nram qab no, tsawg grainy. Tom qab ua ntawv thov cov tshuaj txhuam peb qhov chaw ua tib zoo wiped tawm nrog kerosene. Ces lawv yuav tsum tau lubricated nrog engine roj thiab rov hais dua cov lapping txoj kev, tsom kwm tus "ceev hom". Qhov no yuav muab lub siab tshaj plaws nruj kaw.

Zoo, tom qab ntawd compression nyob rau hauv lub thooj voos kheej kheej yuav ua rau kom ho. Nws yuav tsum tau nco ntsoov tias xyaw, lub compression piv yog tsawg tshaj li 8, yog rhiab heev rau nws. Qhov no zoo heev muaj feem xyuam rau qhov yooj yim ntawm kev siv, li ntawd, lub valve sib tsoo yuav nqa tawm txawm ntawm kho, piv txwv li, tom qab 20 000 km.