I-injector ilawulwa yi-coil ye-electromagnetic, kwaye ukutshintshwa kwekhoyili ye-electromagnetic yangoku ilawulwa yi-ECU. I-ECU iqhuba isignali esondliwa emva kwenzwa kwaye ithumela uphawu lombane kwi-injector. Isibonakaliso sombane sinquma ixesha xa i-injector ivula kwaye ifake i-petroli. Eli xesha lokuphumla libizwa ngokuba "yi-pulse width" ye-injector. Xa i-solenoid coil ye-injector inamandla, intsimi yamagnetic yenziwa. Ngaphantsi kwesenzo sommandla wemagnethi, i-plunger yoyisa amandla entwasahlobo kwaye ifunxe, ithatha umzimba wevalve kude nesihlalo sevalvu, kwaye i-petroli iyakhutshwa kwi-nozzle phantsi koxinzelelo; xa ikhoyili ye-solenoid i-de-energized, i-magnetic field iyanyamalala. , i-plunger ihlehlela ezantsi phantsi kwentshukumo yamandla entwasahlobo, kwaye umzimba wevalvu ucinezela isitulo sevalvu ukuvala ukuvuleka kombhobho, kwaye nepetroli ayinakubaleka. Umzimba wevalve wohlulwe ube ziindidi ezimbini ngokwesakhiwo sawo: ivalve yebhola kunye nevalve yenaliti. Ukuze kuqinisekiswe ukuchaneka kwenaliti ye-fuel, i-valve yebhola okanye i-valve ye-valve kunye nesihlalo se-valve ifuna ukuchaneka okuphezulu, kwaye ukuphakanyiswa kwe-valve yomzimba kuncinci kakhulu, kuphela malunga ne-0.1 mm. Ngenxa yomsebenzi womlawuli woxinzelelo, kukho i-high-pressure oil circuit phambi kwe-injector, kunye noxinzelelo oluphantsi kwi-manifold intake emva kwayo. Umahluko woxinzelelo wenza uxinzelelo olubi, oqinisekisa ukuba isibaso sitofwa kwinkungu ekufutshane nevalve yokungena.

Nangona inkqubo ye-injection ye-fuel elawulwa nge-multi-point ine-injector kwi-cylinder nganye, inani le-fuel efakwe yi-injector lichongwa ngububanzi be-pulse, oku kuthetha ukuba isixa se-fuel injected ixhomekeke kwixesha lokuvula le-injector. Kodwa ngokuthe ngqo kwiifomu ezahlukeneyo zokutofa kwamafutha, azifani zonke. Kukho ii-multi-point fuel injection systems (MPI) kunye ne-sequential fuel injection systems (SFI).