Active Brake Assistant - Ford 2007 WQ Fiesta Repair Manual

206-07-5 Power Brake Actuation 206-07-5
DESCRIPTION AND OPERATION
Item Description
1
3
I
Valve piston
I
i
'
1
4
1
Ball
I
1
5
1
~ o c k sleeve
I
I
2
1
6
1
Ball cage
I
Ball sleeve
Control housing
Active brake assistant
In a normal braking operation, pedal operation
causes the relative travel distance to remain so
small that the distance required for engagement is
not exceeded.
The lock sleeve is held in its rest position by the
force applied by the spring, the ball cage remains
free to move axially and the balls remain free to
move radially.
Item Description
I
1
I
Relative travel distance
I
1
2
1
Disc valve
I
-
1
3
1
Key
I
If the activation threshold level is.exceeded
because of an emergency braking situation, i.e.
the relative travel distance of the valve piston is so
great that the balls are moved in over the slope of
the ball sleeve, then the lock sleeve can move
completely to its end position.
I
- -
The balls are now locked, and the ball sleeve can
no longer be moved in the closing direction of the
disc valve.
The EBA is now active, the brake pressure is
increased up to the wheel locking limit, and the
brake pedal can be moved to its maximum
pressure point without effort.
The brake pressure remains at the ABS control
limit until the EBA is completely released again.
2006.0 Fiesta
1212006 GI 63289en