Fiat 1996 Brava Service Manual page 332

Bravo 101 20v
98 range
Engine
Fuel system
10.
INJECTORS (0.280.155.770)
The twin jet type injectors are fitted on the inlet manifolds, immedeiately before the inlet valve.
These injectors have been specially designed for engines with 4 valves per cylinder and allow the jets to
be directed towards the two inlet valves.
The fuel jets comes out of the injector at a pressure of 3 bar and are instantly atomized forming two
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, which presses them into their housings in the inlet mani­
folds. In addition they are secured to the fuel manifold by means of «safety clips». Two rubber seals (10)
and (11) ensure the seal on the inlet manifold and the fuel manifold.
1. Injector body
2. Needle
3. Magnetic core
4. Coil spring
5. Winding
6. Injector nose
7. Adjustable spring
8. Fuel filter
Wiring connector
The numbers indicate the corresponding con­
trol unit pins arranged in the order of the cylin­
der numbers.
F16 F32
I
«
h_i—
F48
2
— i _ r
1 2
M1S M35
3 4 5
M20 M3 M52
9. Electrical connection socket
10. Fuel seal
11. Vacuum seal
Checking the resistance
The injector resistance can be measured by dis­
connecting the connector and connecting an
ohmmeter as shown in the diagram.
Resistance value 16.2 ohm
D = ^
P4A26LJ02
26
Print no. 506.670/16