Umjovo ulawulwa ikhoyili kagesi, futhi ukushintshwa kwekhoyili kagesi wamanje kulawulwa yi-ECU. I-ECU icubungula isignali enikezwa emuva yinzwa futhi ithumela isignali kagesi kumjovo. Isignali kagesi inquma isikhathi lapho i-injector ivula futhi ijova uphethiloli. Lesi sikhawu sesikhathi sibizwa ngokuthi "ububanzi be-pulse" bomjovo. Lapho ikhoyili ye-solenoid yomjovo inikwa amandla, kukhiqizwa inkambu kazibuthe. Ngaphansi kwesenzo senkundla kazibuthe, i-plunger inqoba amandla entwasahlobo bese imuncwa, isusa umzimba wevalvu esihlalweni, bese uphethiloli ukhishwa ku-nozzle ngaphansi kwengcindezi; lapho ikhoyili ye-solenoid iphelelwa amandla, insimu kazibuthe iyanyamalala. , i-plunger iya phansi ngaphansi kwesenzo samandla asentwasahlobo, futhi umzimba we-valve ucindezela esihlalweni sevalvu ukuze uvale ukuvuleka kombhobho, futhi uphethiloli awukwazi ukuphuma. Umzimba we-valve uhlukaniswe ngezinhlobo ezimbili ngokuya ngesakhiwo sawo: i-valve yebhola kanye ne-valve yenaliti. Ukuze kuqinisekiswe ukunemba komjovo kaphethiloli, i-valve yebhola noma i-valve yenaliti kanye nesihlalo se-valve kudinga ukunemba okuphezulu kokucubungula, futhi ukuphakanyiswa komzimba we-valve kuncane kakhulu, kuphela mayelana ne-0.1 mm. Ngenxa yomsebenzi wesilawuli sokucindezela, kukhona umjikelezo wamafutha we-high-pressure phambi kwe-injector, kanye nokucindezela okuphansi ku-manifold intake ngemuva kwayo. Umehluko wengcindezi wenza umfutho ongemuhle, oqinisekisa ukuthi uphethiloli ujovwa enkungu eduze kwevalvu yokudonsa.

Nakuba isistimu yomjovo kaphethiloli enamaphuzu amaningi elawulwa nge-elekthronikhi inomjovo wesilinda ngasinye, inani likaphethiloli elijovwe umjovo linqunywa ububanzi beshayela, okusho ukuthi inani likaphethiloli elijovwe lincike esikhathini sokuvula komjovo. Kodwa okuqondene namafomu ahlukene omjovo kaphethiloli, awafani wonke. Kukhona amasistimu wokujova uphethiloli wamaphuzu amaningi (MPI) kanye nezinhlelo zokujova uphethiloli ezilandelanayo (SFI).