Kodi valavu ya PCV yamagalimoto ndi chiyani?
Valavu ya PCV (Crankcase forced ventilation valve) ndi gawo lofunika kwambiri la injini yamagalimoto. Ntchito yake yayikulu ndikuwongolera chisakanizo chomwe chili mu crankcase kupita ku intake manifold kuti chiziyakanso, kupewa kutulutsa kwa mpweya mwachindunji mumlengalenga ndikuyambitsa kuipitsidwa. Nthawi yomweyo, imaletsanso kuwonongeka kwa mafuta a injini ndi kuwonongeka kwa injini.
Kapangidwe ndi mfundo yogwirira ntchito
Valavu ya PCV imapangidwa ndi thupi la valavu, valavu, chivundikiro cha valavu ndi kasupe, ndipo digiri yake yotsegulira ndi kutseka imayendetsedwa ndi digiri ya vacuum ya manifold yolowera. Injini ikakhala ikuyenda mofulumira kapena idling, thupi la valavu limatseguka pang'ono kuti lilowetse pang'ono chisakanizocho. Limatsegulidwa kwathunthu pa liwiro lalikulu kapena panthawi yothamanga kuti liwonjezere voliyumu ya mpweya. Injini ikabwerera m'mbuyo, thupi la valavu limatseka lokha kuti crankcase isaphulike.
Ntchito zazikulu
Chitetezo cha chilengedwe cha Youdaoplaceholder0: Pewani mpweya wosakanizidwa wosayaka kuti usatulutsidwe mwachindunji mumlengalenga kuti mupewe kuipitsa.
Youdaoplaceholder0 Tetezani mafuta a injini : Pewani kutayikira kwa mpweya kuti mafuta asasungunuke ndikuwononga, motero kukulitsa moyo wa injini.
Youdaoplaceholder0 Kulamulira kuthamanga kwa mpweya: Limbikitsani kuthamanga kwa mpweya kuti mafuta asatayike.
Ngati valavu ya PCV yatsekeka, izi zitha kupangitsa kuti chinthu choyeretsera mafuta chisawonongeke, mafuta ambiri agwiritsidwe ntchito, injini iwonongeke mwachangu kapena kuwonongeka. Ndikofunikira kuyeretsa nthawi zonse zinthu zodetsa zomwe zili pafupi nayo (monga kuyang'ana kusinthasintha kwa thupi la valavu ndi kupopera vacuum panthawi yokonza nthawi zonse).
PCV ndi chidule cha mawu atatu akuti "Positive Crankcase Ventilation" mu Chingerezi. Mu Chitchaina, limatanthauza crankcase (kapena mafuta pan) active ventilation risk control system. Valavu ya PCV imapangidwa ndi thupi la valavu, valavu, chivundikiro cha valavu ndi kasupe, ndipo singathe kusweka. Ntchito yake yayikulu ndi: kulowetsa mpweya mu crankcase mu intake manifold kudzera mu PCV valve, ndipo mpweya wochepa umalowa mwachindunji mu intake manifold kuchokera ku fyuluta ya mpweya kudzera mu PCV valve. Izi zimapewa zochitika monga kupanga ayezi pa throttle, kuyaka kosakwanira, ndi kuwonongeka kwa mpweya woipa. Kuletsa mpweya kulowa mumlengalenga ndipo nthawi yomweyo kuletsa mafuta a injini kuwonongeka.
Pamapeto pa ntchito yoyatsa mphamvu ya injini, chisakanizo china chosayaka chimatuluka mu crankcase kuchokera ku mphete za pistoni pansi pa mphamvu yayikulu. Mtundu uwu wa kutayikira umatchedwa "blow-by" mumakampani. Mpweya woyipawu umatuluka mu crankcase kupita mumlengalenga, zomwe zimayambitsa kuipitsa. Ngati zosakaniza izi sizitulutsidwa, zidzachepetsanso mafuta a injini mu crankcase, zomwe zimapangitsa kuti mafutawo awonongeke komanso kupangitsa kuti zigawo za injini ziwonongeke msanga. Kuyambira m'ma 1960, California ku United States yakhala yoyamba kufuna kuti magalimoto akhale ndi makina a PCV, omwe akhala chinthu chofunikira kwambiri pamagalimoto.
Mainjini ambiri a petulo ali ndi ma valve a PCV (zipangizo zopumira mpweya zomwe zimaphwanyidwa ndi crankcase) kuti zithandize kusinthana kwa mpweya mu injini. Komabe, zodetsa zomwe zili m'malo ozungulira zimatha kuwunjikana mozungulira ma valve a PCV, zomwe zingawapangitse kuti azitseke. Ngati valve ya PCV yatsekeka, mpweya woipitsidwawo umabwerera mu fyuluta ya mpweya, kuipitsa fyuluta, kuchepetsa mphamvu yosefera, zomwe zimapangitsa kuti mafuta azigwiritsidwa ntchito kwambiri, injini iwonongeke kwambiri, komanso kuwonongeka kwa injini. Chifukwa chake, ndikofunikira kusunga PCV nthawi zonse ndikuchotsa zodetsa zomwe zili mozungulira valve ya PCV.
Vavu ya PCV ndi valavu yowongolera milingo. Imayikidwa pakati pa makina opumira mpweya a crankcase ndi makina olowetsa mpweya a injini. Vavu ya PCV imayendetsedwa ndi digiri ya vacuum kuti ilamulire kuyenda kwa utsi wopangidwa ndi makina opumira mpweya a crankcase kulowa mu makina olowetsa mpweya. Injini ikayenda mofulumira kwambiri, kuyenda kwake kuyenera kukhala kwakukulu kuposa pamene ikuyenda mofulumira kwambiri. Nthawi yomweyo, injini ikakumana ndi vuto lobwerera m'mbuyo, valavu ya PCV iyenera kutha kuletsa mpweya kuti crankcase isaphulike.
Galimoto iliyonse ili ndi chitoliro chotulutsa mpweya woyaka kuchokera mu injini kupita kunja kwa galimoto. Komabe, n'zosatheka kuchotsa mpweya wonse woyaka. Mpweya woyaka pang'ono umalowabe mu chitoliro cha mafuta kudzera pakati pa pistoni ndi khoma la silinda. Mafuta ndi mpweya wolowa mu chitoliro cha mafuta akangosonkhana ndipo sungatulutsidwe, umapanga mpweya woipa, womwe sumangochepetsa mafuta a injini komanso umayambitsa mafuta osayenera m'zigawo za injini. Zingayambitsenso zotsatirapo zoopsa monga kugwiritsa ntchito mafuta molakwika. Chifukwa chake, mafuta ndi mpweya womwe uli mu chitoliro cha mafuta uyenera kukhala ndi chitoliro chotulutsira madzi. Kale, lamulo lisanayambe ndi kuwongolera kuipitsidwa kwa utsi wa magalimoto, chitoliro chinkalumikizidwa ku chitoliro cha mafuta kuti chitulutse mafuta ndi mpweya mwachindunji mumlengalenga. Galimoto ikakula, mafuta ndi mpweya woyaka umatuluka kwambiri, ndipo mpweya woyaka umatuluka mu chitoliro cha mafuta, zomwe zimayambitsa kuipitsidwa kwakukulu kwa mpweya.
Ngati mukufuna kudziwa zambiri, pitirizani kuwerenga nkhani zina patsamba lino!
Chonde tiimbireni foni ngati mukufuna zinthu zotere.
Malingaliro a kampani Zhuo Meng Shanghai Auto Co., Ltd. yadzipereka kugulitsa MG&MAXUSzida zamagalimoto zalandiridwa kugula.
