The invention relates to an air-actuated vehicle system, comprising an actuating device which houses a pressurizable chamber, a pressurized air source, a conduit extending between the pressurized air source and the actuating device, for enabling the pressurizable chamber of the actuating device to be pressurized with air from the pressurized air source, and a pressure sensing arrangement measuring a first pressure inside the pressurized air source and a second pressure inside the pressurizable chamber, wherein the pressure sensing arrangement is configured to determine that the system has an air leakage when the result of the measurement(s) of said second pressure deviates from an expected result, wherein the expected result is based on the result of the measurement(s) of said first pressure. The invention also relates to a method of leakage detection.

An electropneumatic device for a pneumatic braking system, including a compressed air reservoir for providing a reservoir pressure; a brake pressure modulator which receives reservoir pressure and outputs a brake pressure at a brake pressure connection in a manner dependent on electronic braking request signals; a protective valve unit with a protective valve inlet, a first protective outlet and a second protective outlet; the protective valve inlet receiving the brake pressure and which it can provide at the first and second protective outlets; a first and a second pressure line; and, a brake actuator that is connected to the pressure lines. The protective valve unit is configured to throttle the brake pressure output at the first protective outlet in the event of leakage of the first pressure line and to throttle the brake pressure output at the second protective outlet in the event of leakage of the second pressure line.

A vehicular integrated brake system has an EBS and an EPB system integrated in the system to simplify a brake control system and reduce costs. An EBS function and an EPB function are incorporated by adding an EPB valve in the EBS valve system, so that the actuation of the EBS valves and the EPB valve can be controlled by a single integrated controller. A separate pneumatic route connecting the EPB is removed to optimize the pneumatic route. Thus, it is possible to simplify the controller and to reduce costs.

A method for emergency engagement of a holding brake of a vehicle having an electropneumatic brake system. The electropneumatic brake system includes a service brake system with a service brake and a holding brake system with the holding brake. The holding brake system has spring brake cylinders. The service brake system includes a service brake control unit. The electropneumatic braking system includes at least one brake circuit for the service brake and the holding brake. The service and holding brakes may be in separate brake circuits. The spring brake cylinders can be vented when a supply pressure in at least one brake circuit for the service brake decreases. The method includes reducing, via the service brake control unit, the supply pressure in at least one brake circuit for the service brake under a program control in defined conditions.

The disclosure relates to a pneumatic braking system comprising a service brake actuator; an electro-pneumatic modulator unit for receiving an air control pressure representative of a driver's braking request; delivering, by a regulation unit, a modulated air pressure to a service brake chamber; a parking brake actuator; a parking brake unit for delivering a second air pressure to a parking brake pneumatic chamber; and an isolation device for when the isolation device is electrically energized, preventing the delivery of the air control pressure to the regulation unit, and for when the isolation device is not electrically energized, allowing the delivery of air control pressure to the regulation unit when the second air pressure is higher than a threshold, and preventing the delivery of air control pressure to the regulation unit when the second air pressure is lower than the threshold.

A pneumatic braking device for a utility vehicle includes at least one pneumatically controllable spring accumulator for a parking brake of the utility vehicle and an electronic parking brake device. The electronic parking brake device has at least one electronic control unit, at least one bistable valve unit, at least one first valve unit by which a parking brake of a trailer of the utility vehicle can be deactivated when activating the parking brake of the utility vehicle, at least one second valve device which can be connected in such a way that when there is a decrease in the system pressure for supplying the parking brake of the trailer, the parking brake of the trailer can be activated, and a traction vehicle protection valve.

A vehicle braking system comprising a spring brake actuator having a spring brake chamber, a spring brake control assembly and an immobiliser valve which is movable between brake release position in which the spring brake control assembly is operable to cause the flow of pressurised fluid into the spring brake chamber or to vent the spring brake chamber to a low pressure region, and an immobilise position in which the spring brake control assembly is operable to connect the spring brake chamber to a low pressure region but cannot be operated to cause the flow of pressurised fluid into the spring brake chamber.

A circuit has a fluid line matrix and brake components connected to the fluid line matrix. Changes in the brake designs or brake functions can be carried out easily in that at least one interface is provided for connecting a distributor block. The interface is designed such that a configuration of the fluid line matrix can be formed by connecting or exchanging the distributor block. There is also described a distributor block which is suitable for forming a configuration of the fluid line matrix of the circuit by connecting to the at least one interface of the circuit.

A method for automatic electronic control of a brake system in a vehicle includes reading a brake signal for the automatic electronic control of brakes in the vehicle, wherein requests to be implemented by the brakes are transmitted via the brake signal to bring about automatically requested target vehicle longitudinal dynamics. The method further includes determining a brake pressure distribution indicating a ratio of a front axle brake pressure of a front axle to a rear axle brake pressure of a rear axle, and providing at least a first brake pressure signal of the first electronic control unit to at least a first electropneumatic control device, taking into account the braking request signal and the brake pressure distribution for controlling the front axle brake pressure and the rear axle brake pressure, and receiving the brake pressure distribution at a second electronic control unit and storing the detected brake pressure distribution.

A pneumatic braking device for a utility vehicle includes at least one pneumatically controllable spring accumulator for a parking brake of the utility vehicle and an electronic parking brake device. The electronic parking brake device has at least one electronic control unit, at least one bistable valve unit, at least one first valve unit by which a parking brake of a trailer of the utility vehicle can be deactivated when activating the parking brake of the utility vehicle, at least one second valve device which can be connected in such a way that when there is a decrease in the system pressure for supplying the parking brake of the trailer, the parking brake of the trailer can be activated, and a traction vehicle protection valve.