Injectors (0.280.155.770) - Fiat Bravo Service Manual

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I N J E C T O R S (0.280.155.770)

The t w i n jet type injectors are fitted on the inlet manifolds, immedeiately before the inlet valve.

These injectors have been specially designed for engines w i t h 4 valves per cylinder and allow the jets to

be directed towards the t w o inlet valves.

The fuel jets comes out of the injector at a pressure of 3 bar and are instantly atomized forming t w o

cones of around 10° each.

The operation of the injectors is the ((sequential phased» type, i.e. the five injectors are operated accord-

ing to the engine cylinder inlet sequence, whilst the supply can already start for each cylinder during the

expansion stroke until the inlet stroke has already begun.

The injectors are fixed by the fuel manifold, w h i c h presses them into their housings in the inlet mani-

folds. In addition they are secured to the fuel manifold by means of «safety clips». T w o rubber seals (10)

and (11) ensure the seal on the inlet manifold and the fuel manifold.

1. Injector body

3. Magnetic core

4. Coil spring

Wiring connector

The numbers indicate the corresponding con-

trol unit pins arranged in the order of the cylin-

der numbers.

5. W i n d i n g

6. Injector nose

7. Adjustable spring

8. Fuel filter

9. Electrical connection socket

10. Fuel seal

1 1 . Vacuum seal

Checking the resistance

The injector resistance can be measured by dis-

connecting the connector and connecting an

ohmmeter as s h o w n in the diagram.

Resistance value 16.2 ohm

Print no. 506.670/16