Function description - group of activating valves

B42.60-0082-11

13.02 Brake pedal valve

14.01 Parking brake manual valve

16.01 Relay valve

a Supply pressure

b Control pressure

c Braking pressure

Operation:

The compressed air that activates the valves of the group (BV) comes from the groups DE and DS.

Brake pedal valve (13.02)

The pedal brake valve (13.02) uses the air stored in the compressed air reservoirs (5.01), braking the vehicle when the driver applies the brake pedal. It ensures the vehicle to have a gradual braking and proportional to the effort deployed on the brake pedal. After applied, the pedal brake valve (13.02) sends the air to the axle pneumatic cylinders (22.01) and (20.02).

Parking brake manual valve (14.01)

The air coming from the 4-circuit protective valve (4.03, connector 23) flows by the check valve (8.02), which releases the air passage but doesn't allow it to return, ensuring that the circuit is always filled.

The manual parking brake valve (14.01), when applied, allows the progressive application or non-application of the parking brake. It sends a control pressure to the relay valve (16.01).

The relay valve (16.01) works rapidly on filling and flowing of the accumulator springs chambers, shortening the rear axle cylinder activation time (22.01).