Fiat 1996 Brava Service Manual page 566

Braking system
EBD device
Bravo-Brava
33.
The integration of the EBD function into the normal implementation logic of the ABS system allows the
simultaneous operation of the two strategies; as a result, the system normally intervenes to keep the
"creeping" of the rear wheels within values very close to the ideal ones with the possibility, however, of
intervening with the ABS strategy when one rear wheel tends to lock (for example on a surface with
poor adhesion).
The graph below illlustrates the braking pressure implementation strategy, operated by the electronic
control unit, according to the input data, represented by the signal for the rotation speed of the wheels
of the two axles.
,
V
[ Km/h ]
P
[ b a r ]
i
(JEJ
\*
Controllo EDB
>
JF)
i——"~ V—
Controllo ABS
H — *■
-®
E. Rear wheel speed
F. Front wheel speed
G. Front wheel pressure
H. Rear wheel pressure
Operation of the EBD device
The braking pressure for the rear axle is implemented by the control unit in a similar way to the descrip­
tion of the operation of the ABS system during the pressure increase, maintenance and reduction stages.
4 Print no. 506.670/13