Pressure maintenance phase

Pressure maintenance phase

During this phase, the electronic control unit (1) connects the charge solenoid valve (9) to earth, so it closes, while the discharge solenoid valve (10) that is not connected to earth, is already closed.

The hydraulic connection between the brake pump (6) and the brake caliper (11) is cut off (standby position). The pressure in the brake caliper (11) is kept constant at the rating reached previously, regardless of the pressure on the brake pedal.

Although the braking effort maintains a continuous slowing action, the wheel changes its speed, in relation to the grip on the ground, until the signal of the rpm sensor (12) gives a value similar to the reference speed calculated by the electronic control unit (1). At this point, the control unit passes from the maintenance phase to the pressure increase phase (if the wheel accelerates) or reduction (if the wheel tends to lock).