A hydraulic system includes a pump having a pump outlet, a tank configured to supply fluid to the pump, a hydraulic motor coupled to an air compressor that is configured to supply compressed air to an air brake, a steering gear having an inlet workport and an outlet workport, and a compressor bypass valve. The compressor bypass valve is selectively movable between a first position where fluid flow is provided from the pump outlet to both the hydraulic motor and the inlet workport of the steering gear and a second position where the fluid flow from the pump outlet bypasses the hydraulic motor and is supplied to the inlet workport of the steering gear.

A hydraulic system includes a pump having a pump outlet, a tank configured to supply fluid to the pump, a hydraulic motor coupled to an air compressor that is configured to supply compressed air to an air brake, a steering gear having an inlet workport and an outlet workport, and a compressor bypass valve. The compressor bypass valve is selectively movable between a first position where fluid flow is provided from the pump outlet to both the hydraulic motor and the inlet workport of the steering gear and a second position where the fluid flow from the pump outlet bypasses the hydraulic motor and is supplied to the inlet workport of the steering gear.

A control system for wheel-slip prevention in a railway vehicle with a pneumatic brake is provided. The control system comprises an input interface configured to accept a deceleration reference for controlling the pneumatic brake, and a memory configured to store a reference governor providing executable instructions for modifying the deceleration reference upon its violation of a wheel-slip constraint, and configured to store a controller providing executable instructions for mapping the modified deceleration reference to a sequence of control commands for controlling pressure applied by the pneumatic brake. The control system further comprises a processor configured to execute the reference governor to modify the deceleration reference and configured to execute the controller to map the modified deceleration reference to the sequence of control commands. Further, an output interface of the control system is configured to output the sequence of control commands to control the pneumatic brake.

An electro-pneumatic parking brake arrangement includes a shut-off valve and a parking brake module. The parking brake module includes a reservoir connection configured to connect to a compressed air reservoir, a first spring-loaded accumulator connection configured to connect to the shut-off valve, an electro-pneumatic valve unit having at least one electro-pneumatic valve configured to output a spring-loaded brake pressure at the first spring-loaded accumulator connection, and an electronic control unit configured to receive parking brake signals from an electronic parking brake switch and/or a higher-order control unit. The shut-off valve comprises a second spring accumulator connection configured to connect the spring-loaded brakes of the further axle and to shut off the second spring accumulator connection depending on a shut-off signal provided by the parking brake module.

An electro-pneumatic parking brake arrangement includes a shut-off valve and a parking brake module. The parking brake module includes a reservoir connection configured to connect to a compressed air reservoir, a first spring-loaded accumulator connection configured to connect to the shut-off valve, an electro-pneumatic valve unit having at least one electro-pneumatic valve configured to output a spring-loaded brake pressure at the first spring-loaded accumulator connection, and an electronic control unit configured to receive parking brake signals from an electronic parking brake switch and/or a higher-order control unit. The shut-off valve comprises a second spring accumulator connection configured to connect the spring-loaded brakes of the further axle and to shut off the second spring accumulator connection depending on a shut-off signal provided by the parking brake module.

An electropneumatic brake system, for a commercial vehicle which is provided for pulling a trailer, includes at least one service brake circuit configured to activate service brake actuators, a parking brake circuit having parking brake actuators on at least one axle, a trailer brake circuit configured to provide a trailer brake pressure at a trailer brake pressure port, and a manually actuatable operating unit in a driver's cab. The manually actuatable operating unit has a first operating element and a second operating element. In the case of actuation of the first operating element when the vehicle is driving, the parking brake actuators are activated and a trailer brake pressure is output at the trailer brake pressure port. In the case of actuation of the second operating element when the vehicle is driving, only a trailer brake pressure is output.

An electropneumatic brake system, for a commercial vehicle which is provided for pulling a trailer, includes at least one service brake circuit configured to activate service brake actuators, a parking brake circuit having parking brake actuators on at least one axle, a trailer brake circuit configured to provide a trailer brake pressure at a trailer brake pressure port, and a manually actuatable operating unit in a driver's cab. The manually actuatable operating unit has a first operating element and a second operating element. In the case of actuation of the first operating element when the vehicle is driving, the parking brake actuators are activated and a trailer brake pressure is output at the trailer brake pressure port. In the case of actuation of the second operating element when the vehicle is driving, only a trailer brake pressure is output.

The present invention relates to a linear brake assembly for a rail truck, comprising: a brake mechanism, the brake mechanism comprising at least one air brake, the air brake comprising at least a pressurized air chamber; a linear brake pad, the linear brake pad moveable between an extended position and a retracted position via operation of the brake mechanism, the extended position having the linear brake pad in contact with a rail and the retracted position having the linear brake pad not in contact with the rail; the linear brake pad defaulting to an extended position and moving to and from the retracted position via operation of the brake mechanism; wherein movement of the linear brake pad is performed via adjustment of air pressure within the pressurized air chamber of the air brake.

A compressed-air brake assembly for a rail vehicle includes at least one brake cylinder for producing a pressing force for a friction brake, wherein at least one control valve forms a corresponding brake-cylinder pressure in accordance with a pressure in a main air line conducted to the at least one brake cylinder via a line arranged therebetween. The at least one control valve interacts with at least one compressed-air sensor. A reserve-air tank can be controlled by the at least one control valve and stores the reserve air for the at least one brake cylinder. At least one compressed-air sensor arranged on the at least one control valve is connected to an energy source and a data memory having an interface for reading out data, wherein the data in the data memory contain information about a pressure level in the at least one brake cylinder.

A suspension assembly for a heavy-duty vehicle axle/suspension system that includes a geometry that enables components of a brake system to be mounted above and be protected by a beam of the suspension assembly. In an embodiment of the suspension assembly, the beam includes a recessed area that allows a brake actuator to be positioned at least partially within or disposed adjacent the recessed area.