Injectors (0.280.150.443)

INJECTORS (0.280.150.443)

The double jet type injectors are fitted on the inlet manifolds, immediately before the inlet valve. These injectors are specifically for engines with 4 valves per cylinder, making it possible to direct the jets towards the two inlet valves.

The jets of fuel at a differential pressure of 3 bar which leave the injector are instantly atomized forming two cones of about 10° each.

The operation of the injectors is the «sequential timed» type, i.e. the five injectors are operated according to the engine cylinder inlet sequence, whilst the supply can already start for each cylinder during the ex-pansion stroke until the inlet stroke has already begun.

The injectors are fixed by the fuel manifold which presses them into their housings in the inlet manifolds. In addition they are anchored to the fuel manifold by means of «safety clips». Two rubber seals (10) and (11) ensure the seal for the inlet manifold and the fuel manifold.

1. Injector casing
2. Needle
3. Magnetic core
4. Coil spring
5. Winding
6. Injector nose
7. Adjustable spring pusher
8. Fuel filter
9. Electrical connection socket
10. Fuel seal
11. Vacuum seal

Wiring connector

NOTE The numbers indicate the corresponding control unit pins arranged in the order of the number of cylinders.

Checking the resistance

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

Resistance value 16.2 ohm