Impompo yamafutha emoto yahlulwe yangamacandelo amabini: impompo yamafutha kunye nepompo yedizili. Impompo yamafutha ifakwe ngaphakathi kwi-injini. Umsebenzi wayo kukuthumela i-oyile ye-injini kwiindawo zokukhuhlana kwe-injini ukuze i-oyile ye-injini ijikeleze kwisekethe yokuthambisa ukuqinisekisa ukuba i-injini ifakwe kakuhle. Impompo yamafutha ubukhulu becala yimpompo yegiya, equlunqwe ngumzimba wempompo yegiya njalo njalo. Xa injini isebenza, i-camshaft iqhuba igiya yokuqhuba yempompo yomzimba ukujikeleza. Isixhobo sijiwuzisa i-oyile ecaleni kodonga lwangaphakathi lwempompo ukusuka kwi-oyile yokungena kwi-oyile yokukhupha i-oyile, yenze uxinzelelo oluphantsi kunye nokuvelisa ukufunxa, kwaye i-oyile ekwitanki yeoli ifunxa kwindawo yokungena yeoli. Ioyile kwindawo yokukhupha ioyile iqokelelana ngakumbi nangakumbi, ngoko ke uxinzelelo luyanda, kwaye ioyile icinezelwe kwindawo nganye yokukhuhlana ukuze ibone ukuthambisa okunyanzeliswayo.
Ipompo ye-diesel ngumzimba wempompo ofakwe kwi-tank ye-fuel ukuthutha i-fuel kwi-generator kunye nokubonelela ngamandla ukuba imoto iqhube. Umsebenzi wayo kukubonelela nge-fuel efunwa yi-injector nganye kunye ne-injector yokuqala ebandayo. Kukho ngokubanzi iindidi ezimbini zeempompo zedizili zombane ezisetyenziswa kwiinkqubo zokutofa kwepetroli ezilawulwa ngombane, ezizezi, iimpompo zedizili zombane eziqengqelekayo kunye neempompo zedizili zombane. Uhlobo lwe-roller yepompo ye-diesel yombane iqukethe igobolondo, i-cylindrical roller kunye ne-rotor. Ii-roller ezinhlanu ziyakwazi ukutyibilika kwi-groove ye-rotor, kwaye kukho i-eccentricity ethile phakathi kwe-rotor kunye nezindlu. I-rotor ijikeleza phantsi kwe-drive ye-motor ye-DC, kwaye phantsi kwesenzo samandla e-centrifugal, ii-roller zicinezelekile ngokubhekiselele kumphezulu wangaphakathi womzimba wempompo ukuze zenze amagumbi okutywina amahlanu azimeleyo. Xa ujikeleza, umthamo wesigxina ngasinye sokutywina uguquka ngokuqhubekayo, kwaye xa ungaphakathi kwi-oyile yokungena, umthamo uyanda ukuze wenze i-vacuum ethile, kwaye i-petroli ehluziweyo ifakwe kwimpompo. Kwindawo yokuphuma kweoyile, umthamo uba mncinci, uxinzelelo luyenyuka, kwaye i-petroli idlula kwi-DC motor kwaye ityhale ivalve yokujonga ukuba iphume. Xa umbhobho weoyile uvaliwe okanye isihluzo sepetroli sivalekile, uxinzelelo lwepetroli lungaphezulu kwexabiso elichaziweyo, ivelufa yokuthintela uxinezeleko iyavuleka, ize ipetroli ibuyele kwicala elingena ioyile. Ipompo ye-diesel ye-vane yimpompo apho i-vanes kwi-rotor slot idibene ne-casing yepompo, kwaye ulwelo olufunxiweyo lucinezelwe ukusuka kwicala lokungena kwe-oyile ukuya kwicala lokukhupha i-oyile.
