Fuel Injector
Fuel injector consists of a solenoid, plunger needle valve and housing. When current is applied to solenoid coil, valve lifts and pressurized fuel is injected close to intake valve. Since needle valve lift and fuel pressure are constant, air/fuel ratio is determined by time valve is open (duration of current supplied to solenoid coil).
Injector is sealed by an "O" ring and seal ring at top and bottom. All seals, "O" rings and rubber mounts reduce injector operating noise and heat transfer.