Fuel Injector: Description and Operation

GF07.03-P-6010V Component Description For Fuel Injection Valves







Location
The fuel injection valves are mounted between fuel distribution tube and cylinder heads.

Task
Spraying the fuel onto the injectors in the form a finely atomized spray







The diameter and number of the outlet holes (a) are adjusted to the fuel requirements of the engine.

Function
If solenoid winding is energized, the nozzle needle is raised by the solenoid armature about 0.1 mm against the force of the coil spring.

The fuel flows through an outlet opening and is sprayed onto the injectors in a finely atomized spray.

The supply voltage to the fuel injection valves is provided via fused terminal 87. Corresponding long electrical ground pulses from the ME control unit facilitate actuation.

The fuel injection valves are actuated by the ME-SFI control unit, in other words one injection valve is assigned to each cylinder which meters the quantity of fuel calculated for the cylinder.

In case of detected misfires, the actuation of the corresponding cylinder is interrupted.