UmGangatho oPhezulu oMtsha oMtsha oQhelekileyo wokuLawula iValve yesitofu sikaLoliwe F00VC01509 iNdibano yeValve yeeNdawo eziSparekileyo zeNjini yesibaso

Kwinkqubo yokuqinisekisa ibhentshi, amandla kunye nokusetyenziswa kwamafutha enjini ye-diesel aye ancitshiswa ngokuqhubekayo. Emva kovavanyo, ubungakanani be-oyile yesitofu buncitshisiwe, kwaye kwafunyaniswa ukuba isihlalo sokutywina somzimba wevaluli yenaliti yombhobho sinxitywe kakhulu. Ngokwedatha yovavanyo, ukunxitywa kwesitulo sokutywina somzimba wevalve yenaliti kubangelwa ngamandla empembelelo egqithisileyo kwindawo yesitulo sokutywina xa iseti ivalve yenaliti yesitofu. Ngokuphucula i-valve yokulawula i-injector kunye nokunciphisa ububanzi be-valve yenaliti, amandla empembelelo yevalve yenaliti kwindawo yokutywina isihlalo siyancitshiswa. I-injector ephuculweyo iqinisekisiwe ngokuhlala kwe-injini. Ngexesha lovavanyo lokuqina, amandla kunye nokusetyenziswa kwepetroli kuzinzile, kwaye ukunxitywa kwesihlalo sokutywina somzimba we-pin valve kusengaphakathi kwexabiso eliqingqiweyo. Ingxaki isonjululwe. Isisombululo sale ngxaki sibonelela ngamava kunye nereferensi yoyilo lwevalve yokulawula i-injector, kwaye ibonelela ngenkxaso yedatha kumandla empembelelo apho isihlalo sokutywina somzimba wevalve yenaliti sinokumelana. ubume besitshizi sesibaso kunye neempawu zokutofa kwamafutha. Ijolise kumonakalo obangelwe kukudityaniswa kwevalve yenaliti phantsi kwesenzo sokuphindaphinda rhoqo kunye nomjikelo wempembelelo yoxinzelelo oluphezulu, uvavanyo lokudinwa koQhakamshelwano, i-metallographic microscope (OM) enenkqubo yohlalutyo lomfanekiso kunye ne-thermal field scanning electron microscope yasetyenziswa ukufunda ukusilela kokunxiba. umaleko wokugquma wesihlalo sevalve yenaliti kunye nokuziphatha koguquko lwesihlalo sevalve yenaliti phantsi koxinzelelo olwahlukileyo kunye neendlela zokulayisha. Iziphumo zibonisa ukuba eyona ndlela iphambili yomonakalo wokudinwa kwevalve yenaliti yokudibanisa phantsi kweendlela ezahlukeneyo zokulayisha ngumonakalo wokudinwa wokudinwa kokuphela kokutyabeka kwesiseko sevalve yenaliti. Phakathi kwazo, ukuhanjiswa koxinzelelo lonxibelelwano lomphezulu womthwalo ongaphezulu wokulayisha ivalve yewotshi iyafana, kwaye umda wokudinwa uphezulu (228 MPa), ngelixa ukulayisha umphezulu wenyathelo utyekele kumandla angalinganiyo okulayisha, okukhokelela kumonakalo wokudinwa kuqala kugxininiswe kwisiqingatha. indawo yesangqa, umonakalo wokukhathala kunye nomonakalo awulingani, kwaye umda wokukhathala uncinci, kuphela i-74.6% yokulayisha okuphezulu.