Fiat 1998 Marea Weekend, Service Manual

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Marea - Marea Weekend
Braking system
Anti-lock brakes
33.
EBA function (Electronic Brake Apportioning)
The introduction of the EBC 430 makes it possible to distribute the brake force between the front and
rear axles using a special function of the electronic control unit.
With this in mind, the electronic control unit continuously compares the speed of the front and rear
wheels using the speed sensors and operates the electro-hydraulic unit in order to prevent the rear
wheels from locking, always taking maximum advantage of the adhesion to the ground in all load condi-
tions.
The EBA function makes the need for the hydraulic load proportioning valve acting according to the
load on the rear axle superfluous which is why it has been eliminated from the vehicle braking circuit.
The graph below illustrates the intervention of the EBA device (curve D) in relation to the pressure in the
braking system (curva A), the ideal pressure at the rear axle brakes (curve C), on the assumption that the
vehicle is empty.
B. Ideal distribution, with vehicle fully laden
As it can be noted, the EBD function for the ABS system is capable of adapting to the ideal pressure
curve, always exploiting the available adhesion in all braking conditions.
B
P4F15BD01
A. Distribution implemented by the braking
system
C. Ideal distribution, with vehicle empty
D. EBA control
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