Reapply Mode (Pressure Increase) - Daewoo MATIZ Service Manual

4F – 10 ANTILOCK BRAKE SYSTEM
Return Pump
RR
Isolation Valve
RR Dump Valve
RR
This reapply sequence is initiated to obtain optimum braking. The isolation valve is momentarily pumped open to allow
master cylinder and pump pressure to reach the brakes. This controlled pressure rise continues unitl the wheel is at
optimum brake output or until the brake pressure is brough up to the master cylinder output pressure.
If more pressure is required, more fluid is drawn from the master cylinder and applied to the brakes. The driver may
feel slight pedal pulsations, or pedal drop, this is normal and expected.
As fluid is reapplied to the wheel, they begin to slow down. If they approach imminent lockup again, the EBCM will
isolate, dump and reapply again. The control cycle (isolation, dump, reapply) occurs in milli-second intervals, allowing
seveal cycles to occur each second.
It is a much faster and more controlled way of "pumping the pedal".
Master Cylinder
High Pressure Attenuator
FL
Isolation Valve
Low
Pressure
Accumulator
FL
Dump
Valve
FL

REAPPLY MODE (PRESSURE INCREASE)

High Pressure Attenuator
Return Pump Motor
FR
Isolation Valve
Low Pressure
Accumulator
FR Dump Valve
FR
Return Pump
RL
Isolation
Valve
RL
Dump
Valve
RL
DAEWOO M-150 BL2
D17E208A