Kodi chivundikiro cha valavu n'chiyani?
Chivundikiro cha valavu ndi mbale yophimba yomwe imagwiritsidwa ntchito kuteteza camshaft pamwamba pa chipinda cha valavu ndikupanga dzenje lotsekedwa ndi mutu wa silinda (palinso njira zobwezeretsera mafuta, njira zoperekera mafuta ndi njira zina zolumikizira mafuta ndi dzenje lina)
Kodi chifukwa cha kutuluka kwa mpweya mu chivundikiro cha valavu n'chiyani?
Kutuluka kwa mpweya kuchokera ku chivundikiro cha valavu kudzapangitsa kuti galimoto isathe kuyendetsa. Ngati chisakanizocho chili cholemera kwambiri kapena chochepa kwambiri, mafuta omwe ali mu chipinda choyaka moto satenthedwa kwathunthu, zomwe zimapangitsa kuti mafuta azigwiritsidwa ntchito kwambiri. Zidzapangitsanso kuti galimotoyo iyende pang'onopang'ono. Injini imakhala yovuta kuyiyambitsa, mphamvu imachepa, kuyaka sikukwanira, mpweya woipa ndi waukulu, ndipo ngakhale masilindala amodzi sangagwire ntchito. Nthawi zambiri, ngati pali kutayikira kwa mafuta, tikulimbikitsidwa kusintha chivundikiro cha valavu.
Kodi pali vuto ngati gasket ya valavu ikutulutsa mafuta?
Gasket yophimba valavu imataya mafuta, zomwe zimakhudzabe galimotoyo. Iyenera kusinthidwa pakapita nthawi. Gasket yophimba valavu imagwiritsidwa ntchito makamaka potseka kuti mafuta asatayike. Ngati sichisinthidwa pakapita nthawi, chisindikizocho chidzachepa, kuuma, kutaya kusinthasintha komanso kusweka kwambiri. Ngati ndi kutayikira kwa mafuta komwe kumachitika chifukwa cha kukalamba kwa mutu wa silinda ya valavu, vutoli lingathe kuthetsedwa posintha mutu wa silinda ya valavu ndi watsopano. Ngati mutagula nokha, mtengo wake ndi pafupifupi 100 yuan. Ngati mupita ku sitolo ya 4S kuti mukayisinthe, idzakhala osachepera 200 yuan. Gasket yophimba valavu nthawi zambiri imapangidwa ndi rabara, ndipo chimodzi mwazinthu zazikulu za rabara ndi ukalamba. Chifukwa chake, ngati nthawi yogwira ntchito yagalimoto ndi yayitali kwambiri, zinthu za rabara zidzakalamba ndikulimba, zomwe zimapangitsa kuti mafuta atayike. Mukasintha, samalani mfundo zotsatirazi. Mukasintha, yeretsani kwathunthu pamwamba pa cholumikizira. Ikani guluu ngati mungathe, chifukwa zimatenga nthawi yayitali kupaka guluu. Palibe vuto kusagwiritsa ntchito guluu. Zimatengera zomwe mwiniwake akufuna. 2. Injini iyenera kuziziritsidwa bwino isanasinthidwe. 3. Mukayika chivundikiro cha valavu, chimangeni kangapo mopingasa. Mukakonza screw, bwererani ku screw yopingasa. Izi zidzateteza kupsinjika kosagwirizana pa gasket ya valavu.
Kodi chivundikiro cha valavu chimawoneka bwanji choipa?
Kawirikawiri pali zifukwa zingapo zomwe zimapangitsa kuti gasket yophimba ma valve iwonongeke. Choyamba ndi chakuti bolt ndi yomasuka, chachiwiri ndi kuphulika kwa injini, chachitatu ndi kusweka kwa chivundikiro cha ma valve, ndipo chachinayi ndi chakuti gasket yophimba ma valve yawonongeka kapena sinaphimbidwe ndi sealant.
Pa nthawi ya injini yopanikizika, mpweya wochepa umatuluka kuchokera pakhoma la silinda ndi mphete ya piston kupita ku crankcase, ndipo kuthamanga kwa crankcase kudzakwera pakapita nthawi. Panthawiyi, valavu yopumira ya crankcase imagwiritsidwa ntchito kutsogolera gawo ili la mpweya kupita ku intake manifold ndikuyamwa mu chipinda choyaka kuti igwiritsidwenso ntchito. Ngati valavu yopumira ya crankcase yatsekedwa, kapena malo pakati pa mphete ya piston ndi khoma la silinda ndi akulu kwambiri, zomwe zimapangitsa kuti mpweya ulowe kwambiri komanso kuti crankcase ikhale yolimba kwambiri, mpweyawo udzatuluka pamalo omwe ali ndi kutseka kofooka, monga gasket yophimba valve, zisindikizo zamafuta akutsogolo ndi kumbuyo kwa crankshaft, zomwe zimapangitsa kuti mafuta atuluke mu injini.
Bola mukamayika sealant, kumangitsa mabotolo, ndipo chivundikiro cha valavu sichinasweke kapena kusokonekera, zimasonyeza kuti chivundikiro cha valavu chili bwino. Ngati simuli bwino, mungagwiritse ntchito rula ndi geji yoyezera makulidwe (feeler gauge) kuti muyese kusalala kwa chivundikiro cha valavu kuti muwone ngati sichikusokonekera.
