Abstract: A pneumatically-operated vehicle brake system has a first compressed air line in which compressed air at a controllable service brake pressure can be provided. Membrane parts of brake cylinders can be ventilated by the service brake pressure for a service brake function. A parking brake device includes a second compressed air line in which compressed air can be provided at a parking brake pressure electro-pneumatically. Brake cylinder spring brake parts can be ventilated by compressed air at the service brake pressure to provide a parking brake function. The parking brake device also has a ventilation inlet by which the second compressed air line can be ventilated to increase the parking brake pressure, and a first ventilation outlet by which the second compressed air line can be ventilated to reduce the parking brake pressure. The second compressed air line can be pneumatically connected to the first via the first ventilation outlet.

Abstract: A valve unit for an electro-pneumatic brake control is connected to an input of an air-quantity-boosting valve for the aeration/venting thereof. A double-armature solenoid valve includes primary and secondary armatures each spring-loaded and actuated by a common magnet coil. The primary armature is a switch for a vent valve; the secondary armature is a switch for an intake valve. When the coil is not drawing current, the armatures are in spring-loaded position, the intake valve blocking intake and the vent valve venting. When a first current flows through the coil, the primary armature enters switching position, with the secondary armature in spring-loaded position; the intake valve blocking intake and the vent valve blocking venting. When a second current greater than the first flows through the coil, both primary and secondary armatures are moved into switching positions, so that the intake valve admits air and the vent valve blocks venting.

Abstract: An electro-pneumatic brake control device is provided for controlling the parking brake of a vehicle having compressed-air-actuated brake cylinders, at least one of which is a spring brake cylinder with a spring store part. Valve devices place the brake control device into various operating states. In a first operating state, the valve devices are at least partially supplied with current and switched such that a compressed air line to the spring store part of the spring brake cylinder is aerated. In a second state, the valve devices are at least partially supplied with current and switched such that the compressed air line is deaerated. In a third state, which can be activated in the event of failure of the electrical energy supply of the brake control device, the valve devices are switched to a currentless state such that the compressed air line is automatically deaerated in throttled manner.

Abstract: An electropneumatic brake control device for controlling an air-quantity-boosting valve device which controls a parking brake of a vehicle. A valve unit is provided that has a vent valve for venting a control input of the air-quantity-boosting valve device. The vent valve has three states. In a first state, the control input of the air-quantity-boosting valve device can be vented in a throttled manner by using an aperture. In a second state, the control input of the air-quantity-boosting valve device cannot be vented. In a third state, the control input of the air-quantity-boosting valve device can finally be vented in an unthrottled manner.

Abstract: The invention relates to a pneumatically operated brake system (30) for a vehicle. Said brake system (30) has a first compressed air line (4), in which compressed air having a controllable service brake pressure can be provided. Membrane parts (6) of brake cylinders (8) can be ventilated by means of said service brake pressure for a service brake function of said vehicle. Said brake system (30) further has a parking brake device (76) comprising a second compressed air line (12). Compressed air can be provided-in said second compressed air line (12) by means of said parking brake device (76) at a parking brake pressure that can be activated in an electro-pneumatic manner. Spring brake parts (22) of the brake cylinders (8) can be ventilated by compressed air having said service brake pressure in order to provide a parking brake function of said vehicle.

Abstract: The invention relates to an electropneumatic brake control device for controlling an air-quantity-boosting valve device (64) which controls a parking brake of a vehicle. The valve unit (86) has a deaeration valve (134) for deaerating a control input (82) of the air-quantity-boosting valve device (64). The invention provides that the deaeration valve (134) is a valve which has three states I, II and III and which is embodied such that, in a first state I, the control input (82) of the air-quantity-boosting valve device (64) can be deaerated in a throttled manner by means of an aperture (162). In a second state II, the control input (82) of the air-quantity-boosting valve device (64) cannot be deaerated. In a third state III, the control input (82) of the air-quantity-boosting valve device (64) can finally be deaerated in an unthrottled manner.

Abstract: An electro-pneumatic brake control device is provided for controlling a parking brake of a vehicle having a service brake and a parking brake, the service brake having a brake pedal and pneumatically actuatable brake cylinders operatively connected to the brake pedal for actuating wheel brakes. At least one brake cylinder is a spring brake cylinder with a spring store part for actuating the parking brake. In the event of a failure of the electrical energy supply, the spring store part of the spring brake cylinder is permanently vented by actuating the brake pedal in order to activate the parking brake.

Abstract: A valve unit for an electro-pneumatic brake control is connected to an input of an air-quantity-boosting valve for the aeration/venting thereof. A double-armature solenoid valve includes primary and secondary armatures each spring-loaded and actuated by common magnet coil. The primary armature is a switch for a vent valve; the secondary armature is a switch for an intake valve. When the coil is not drawing current, the armatures are in spring-loaded position, the intake valve blocking intake and the vent valve venting. When a first current flows through the coil, the primary armature enters switching position, with the secondary armature in spring-loaded position; the intake valve blocking intake and the vent valve blocking venting. When a second current greater than the first flows through the coil, both primary and secondary armatures are moved into switching positions, so that the intake valve admits air and the vent valve blocks venting.

Abstract: An electro-pneumatic brake control device is provided for controlling the parking brake of a vehicle having compressed-air-actuated brake cylinders, at least one of which is a spring brake cylinder with a spring store part. Valve devices place the brake control device into various operating states. In a first operating state, the valve devices are at least partially supplied with current and switched such that a compressed air line to the spring store part of the spring brake cylinder is aerated. In a second state, the valve devices are at least partially supplied with current and switched such that the compressed air line is deaerated. In a third state, which can be activated in the event of failure of the electrical energy supply of the brake control device, the valve devices are switched to a currentless state such that the compressed air line is automatically deaerated in throttled manner.

Abstract: A fluid-pressure brake system for a vehicle having a parking brake function in which, in response to actuation of an electrical parking brake signal transmitter, and without actuation of a brake pedal, at least one wheel brake of the brake system is actuated via an actuator to which the fluid is admitted. A parking brake module is provided in which there is integrated an electronic control unit as well as valve devices that are electrically actuatable by the electronic control unit. The electronic control unit actuates the parking brake function upon receiving from the parking brake signal transmitter an electrical actuating signal demanding actuation of the parking brake function and, as part of the parking brake function, the electronic control unit controls the admission of fluid to the actuator by means of the electrically actuatable valve devices.

Abstract: A valve arrangement includes an operating valve arrangement in the form of a relay valve and a control valve arrangement. The control valve arrangement includes a controlled inlet valve and a controlled outlet valve. Solenoid valves are provided for selectively routing pressure medium. A first control piston and a second control piston, which can be subjected to pressure by a pressure medium via operation of the solenoid valves, control actuation of the inlet valve and the outlet valve of the control valve arrangement. The control valve arrangement is installed directly on the housing of the operating valve arrangement to achieve a compact structural unit and to reduce the amount of pressure medium channels and pressure medium connections required. The operating valve arrangement and the control valve arrangement are designed such that parts of the control valve arrangement are located in, or constituted by, the operating valve arrangement.