Wiring connector

1. Fuel inlet
2. Deflector
3. Jet
4. Nose
5. Jet of fuel
6. Electrical connector

The injectors have the task of supplying the quantity of fuel required for the operation of the engine: the fuel is injected into the inlet manifold, immediately upstream of the inlet valve.

The injector is the "top-feed" type, with the supply of the fuel from the rear of the casing, where the electrical winding connected to the connector (6) is also housed.

When the current passes through the winding, the magnetic field produced attracts the shutter causing the opening of the injector and the flow of fuel.

As the pressure differential between the inside and the outside of the injector is constant (thanks to the presence of the regulator), the quantity of fuel supplied, like the electrical voltage, only depends on the opening time, established by the control unit.

The end section of the injector or nose (4) is fitted with a jet (3) which gives the fuel a rotary motion, thanks to a deflector (2) fitted with four tangentially positioned flow ports.

Wiring connector

The resistance of the injector can be measured by disconnecting the connector and connecting an ohmmeter as shown in the diagram.

Value of the resistance: 12 ± 1,2 ohm.