Ebd Device; Electronically Operated Brake Force Distribution Device (Ebd) - Fiat Bravo Service Manual

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E L E C T R O N I C A L L Y O P E R A T E D BRAKE F O R C E D I S T R I B U T I O N D E V I C E (EBD)

The Teves MK20 ABS system, described in the relevant chapter of this manual, is coupled w i t h the EBD

function (Electronic Brake-force Distribution), which electro-hydraulically controls the distribution of

the pressure sent to the brakes between the front and rear axles.

This f u n c t i o n is controlled by the A B S electronic c o n t r o l unit w h i c h uses the same sensors a n d

actuators as the A B S circuit t o calculate and implement the distribution of the braking pressure.

The introduction of this f u n c t i o n makes the use of the conventional mechanical load p r o p o r t i o n -

ing valve superfluous and it is removed from the rear brake hydraulic circuit.

In a d d i t i o n , the o p t i m u m e x p l o i t a t i o n of the rear brakes is ensured as the device is capable of c o n -

stantly sending the ideal braking pressure to prevent the rear wheels from l o c k i n g .

The diagrams overleaf illustrate the location of the device components, the majority of w h i c h are the

same as on the ABS system.

Key for diagrams showing braking system with A B S integrated with E B D function

Hydraulic circuit for right front and left rear brake

Hydraulic circuit for left front and right rear brake

1. Hydraulic control unit with electronic control unit incorporated

2. Brake pump

3. Brake servo

4. Brake fluid reservoir

5. Rpm sensors for front wheels

6. Front disc brakes

7. Warning light signalling ABS system failure

8. Brake lights switch

9. Handbrake lever

10. Handbrake warning light or l o w brake fluid level

1 1 . Rpm sensors for rear wheels

12. Rear drum brakes (excluding 1998 20v)

13. Rear disc brakes (only for 1998 20v)

Braking system

EBD device