Pressure maintaining phase

Pressure maintaining phase

In this phase there is an increase in both the speed and acceleration of the wheel.

The solenoid valve (4) is energised with a 2 Amp current; the connection between the brake pump and the rear brake calipers is still cut off (standby position). The pressure on the rear brake calipers increases slightly as a result of the movement of the solenoid valve and it is then kept at a constant rate.

The braking force continues its slowing action even if the speed of the wheels nears that of the vehicle; once the permitted threshold has been reached it is necessary to increase the braking force again.

This cycle is repeated down to a speed of approximately 6 kph when the ABS system cuts itself off to allow the vehicle to come to a halt.

• A. Electronic control unit
• B. Brake pump outlet hose
• C. Brake pump outlet hose

1. Brake pump
2. Solenoid valve for front wheel brake circuit
3. Solenoid valve for front wheel brake circuit
4. Solenoid valve for rear wheel brake circuit
5. Electric recovery pump
6. Accumulators
7. Revolution sensors and phonic wheels front wheels
8. Revolution sensors and phonic wheels for rear wheels
9. Hydraulic sequential valve
10. Piston
11. Piston
12. Stiff rod connecting pistons
13. Spring
14. Valve