Chinhu chinosefa mafuta einjini ndicho chinosefa mafuta einjini. Basa resefa mafuta einjini nderekusefa mafuta akasiyana-siyana, colloids uye hunyoro mumafuta einjini uye kuendesa mafuta einjini akachena kunzvimbo dzese dzinozora mafuta.
Kuti kuderedza kuramba kupokana pakati pezvikamu zvinofamba muinjini uye kuderedza kupera kwezvikamu, oiri inoramba ichiendeswa kunzvimbo yekupokana yechikamu chimwe nechimwe chinofamba kuti igadzire firimu remafuta ekuzora. Oiri yeinjini pachayo ine huwandu hwakati hwechigunwe, tsvina, hunyoro nezvimwe zvinowedzera. Panguva imwe chete, panguva yekushanda kweinjini, kuiswa kwetsvina yesimbi, kupinda kwezvishandiso mumhepo uye kugadzirwa kwemafuta oxides kunowedzera zvishoma nezvishoma huwandu hwezvishandiso muoiri. Kana oiri isina kuseferwa uye ichipinda zvakananga muchikamu chemafuta ekuzora, huwandu hwezvishandiso zviri muoiri huchaunzwa munzvimbo yekupokana yezvikamu zvinofamba, zvichikurumidzisa kupera kwezvikamu uye kuderedza hupenyu hwebasa reinjini.
Nekuda kwekusimba kwakanyanya kwemafuta einjini uye huwandu hwakawanda hwetsvina mumafuta einjini, kuti kuvandudza kushanda zvakanaka kwekusefa, sefa yemafuta einjini inowanzova nematanho matatu: muunganidzi wemafuta einjini, sefa yekutanga yemafuta einjini uye sefa yechipiri yemafuta einjini. Sefa inoiswa mupani yemafuta pamberi pepombi yemafuta uye inowanzo tora rudzi rwechidzitiro chesefa yesimbi. Sefa yekutanga yemafuta inoiswa kuseri kwepombi yemafuta uye yakabatana zvakatevedzana nepasefa huru yemafuta. Inonyanya kusanganisira simbi scraper, sawdust filter element uye microporous filter paper. Iye zvino bepa resefa re microporous ndiro rinoshandiswa zvakanyanya. Sefa yemafuta inoiswa kuseri kwepombi yemafuta uye yakabatana zvakaenzana nepasefa huru yemafuta, kunyanya kusanganisira bepa resefa re microporous uye rotor. Sefa yemafuta yerudzi rwe rotor inoshandisa centrifugal filtration isina filter element, iyo inogadzirisa zvinobudirira kupesana pakati pekukwanisika kwemafuta uye kushanda zvakanaka kwekusefa.
