Pombi yemafuta yemotokari yakakamurwa kuita zvikamu zviviri: pombi yemafuta uye pombi yedhiziri. Pombi yemafuta inoiswa mukati mejini. Basa rayo nderekutumira oiri yeinjini kunzvimbo dzinokwesha dzeinjini kuti oiri yeinjini itenderere mudunhu rekuzora kuti ive nechokwadi chekuti injini yakanyatsozorwa. Iyo pombi yemafuta inowanzova pombi yegiya, iyo inoumbwa nemuviri wepombi yegiya uye zvichingodaro. Kana injini iri kushanda, camshaft inotyaira giya rekufambisa repombi muviri kutenderera. Iyo giya inotenderedza mafuta pamadziro emukati wepombi kubva painopinza mafuta kuenda kuoiri inobuda, ichigadzira yakaderera kudzvanywa uye kuburitsa kusveta, uye mafuta ari mutangi remafuta anoyamwa mukati meoiri inopinza. Oiri painobuda oiri inounganidza zvakanyanya uye zvakanyanya, saka kudzvanywa kunowedzera, uye oiri inotsikirirwa kune yega yega friction chikamu kuti uone kumanikidzirwa mafuta.
Pombi yedhiziri ndiyo muviri wepombi wakaiswa mutangi remafuta kutakura mafuta kuenda kujenareta uye kupa simba rekuti mota ityaire. Basa rayo nderekupa mafuta anodiwa nejekiseni rega rega uye kutonhora kwekutanga jekiseni. Kune anowanzo marudzi maviri emagetsi edhiziri pombi anoshandiswa mumagetsi anodzorwa majekiseni epeturu, anoti roller magetsi edhiziri pombi uye vane magetsi edhiziri pombi. Iyo roller mhando yemagetsi dizeli pombi ine ganda, cylindrical roller uye rotor. Iwo mashanu rollers anogona kutsvedza radially mugomba re rotor, uye pane imwe eccentricity pakati pe rotor neimba. Iyo rotor inotenderera pasi pedhiraivha yeDC mota, uye pasi pekuita kwe centrifugal simba, ma roller anotsikirirwa pamusoro pemukati wepombi muviri kuti aumbe makamuri mashanu akazvimirira ekuvharisa. Kana ichitenderera, vhoriyamu yega yega yekuvharisa mhango inoshanduka ichienderera, uye kana iri muoiri inopinza, vhoriyamu inowedzera kuita imwe vacuum, uye peturu yakasefa inoyamwa mupombi. Pakubuda kwemafuta, vhoriyamu inova diki, kudzvanywa kunokwira, uye peturu inopfuura nepakati pemota yeDC uye inosundira cheki valve kuti ibude. Kana pombi yemafuta yavharwa kana sefa yepeturu yavharwa, kudzvanywa kwepeturu kunodarika kukosha kwakatarwa, vharafu inomisa mhepo inovhurika, uye peturu inoyerera ichidzokera kudivi rekupinza mafuta. Vane diesel pombi ipombi umo mavhesi ari murotor slot anosangana nepombi casing, uye mvura yakayamwa inotsikirirwa kubva kudivi rekupinda nemafuta kuenda kudivi rekubuda kweoiri.
