A service brake device for vehicles is provided which permits rapid venting of a service brake pressure chamber. The service brake device includes at least one pneumatic service brake device with at least one piston and/or a diaphragm. The piston and/or diaphragm delimits the service brake pressure chamber on one side which can be supplied with compressed air from a brake line for applying the service brake and can be purged of compressed air for releasing the service brake, delimits a spring chamber on the other side which receives a spring that prestresses the piston and/or the diaphragm in the release position of the service brake. The pressure chamber includes a pressure connection communicating with the brake line. A quick air release valve between the brake line and the pressure chamber is arranged to connect the brake line to the pressure chamber when the pressure in the brake chamber is greater than in the pressure chamber, and to connect the pressure chamber to the spring chamber when the pressure in the pressure chamber is greater than the brake line pressure.

A brake control valve arrangement for controlling application of a braking force includes an electro-pneumatic brake control valve block including a hold valve and a vent valve (PRESSURE CONTROLLER), a main regulator valve (RELAY VALVE) and an emergency and a variable load control pressure regulator. The valve block has an inlet for a brake supply pressure, and an outlet in pneumatic connection with a brake cylinder. A pilot pressure into the main regulator valve from the variable load control pressure regulator is controlled by a remote release solenoid valve (CONTROL CHAMBER VENT MAGNET VALVE). The remote release solenoid valve adapted to vent brake cylinder pressure to atmosphere when de-energized thereby enabling release of the wheel braking force via the main regulator valve.

A brake control valve arrangement for controlling application of a braking force includes an electro-pneumatic brake control valve block including a hold valve and a vent valve (PRESSURE CONTROLLER), a main regulator valve (RELAY VALVE) and an emergency and a variable load control pressure regulator. The valve block has an inlet for a brake supply pressure, and an outlet in pneumatic connection with a brake cylinder. A pilot pressure into the main regulator valve from the variable load control pressure regulator is controlled by a remote release solenoid valve (CONTROL CHAMBER VENT MAGNET VALVE). The remote release solenoid valve adapted to vent brake cylinder pressure to atmosphere when de-energized thereby enabling release of the wheel braking force via the main regulator valve.

A pneumatic ABS valve device (10) includes: a casing (1) having a supply port (2) for receiving pressurized air; a working port (3) for providing a braking pressure to a brake actuator (9); an exhaust port (4) for a releasing pressurized air from the brake actuator (9); and a flow path (17) defined in the casing (1) and connecting the working port (3) and the supply port (2). A reversibly deformable quick release insert (5) is arranged in the flow path (17) and received in the casing (1) and moves into a blocking position (B) when an exhaust air flow (f2) is provided by the working port (3). The quick release insert deforms in the blocking position (B) to sealingly rest against a sealing surface (28) of the casing (1) thereby blocking the flow path (17), and returns into an undeformed basic position (A) in an unloaded or low-loaded condition.

A pneumatic ABS valve device (10) includes: a casing (1) having a supply port (2) for receiving pressurized air; a working port (3) for providing a braking pressure to a brake actuator (9); an exhaust port (4) for a releasing pressurized air from the brake actuator (9); and a flow path (17) defined in the casing (1) and connecting the working port (3) and the supply port (2). A reversibly deformable quick release insert (5) is arranged in the flow path (17) and received in the casing (1) and moves into a blocking position (B) when an exhaust air flow (f2) is provided by the working port (3). The quick release insert deforms in the blocking position (B) to sealingly rest against a sealing surface (28) of the casing (1) thereby blocking the flow path (17), and returns into an undeformed basic position (A) in an unloaded or low-loaded condition.

An air brake valve designed to remove the air from a vehicle air brake system in order to apply parking brakes in a manner to prevent unauthorized release of said brakes, and to achieve regulatory pre-trip and D.O.T. inspection of system low pressure warning indicator as well as regulatory after trip parking procedures for school busses.

An air brake valve designed to remove the air from a vehicle air brake system in order to apply parking brakes in a manner to prevent unauthorized release of said brakes, and to achieve regulatory pre-trip and D.O.T. inspection of system low pressure warning indicator as well as regulatory after trip parking procedures for school busses.