A vehicle braking system includes a piston rod extendable from an air brake chamber, a rotatable cam shaft, and a slack adjuster coupled to the piston rod and the cam shaft. The slack adjuster is configured to rotate the cam shaft as the piston rod extends. The slack adjuster has a control gear coupled to the cam shaft such that the control gear rotates as the cam shaft is rotated. A pinion gear meshes with the control gear such that the pinion gear rotates as the control gear rotates, and a take-off gear meshes with the pinion gear such that the take-off gear rotates as the control gear rotates. A magnet coupled to the take-off gear is configured to rotate as the take-off gear rotates. A sensor is configured to sense rotation of the magnet, and an indicator is configured to indicate brake stroke of the piston rod.

A method, device and system for cutting a bogie brake off are disclosed. The method includes that: when a bogie brake is not able to be relieved, a cutting-off instruction output from an Operating Control Center (OCC) is received, wherein the cutting-off instruction is used for triggering an action of cutting the bogie brake off; a logic operation is performed on the cutting-off instruction to obtain an isolation control instruction; and an electromagnetic valve corresponding to a bogie is controlled to act according to the isolation control instruction, so as to cut the bogie brake off. According to the method, the technical problem that a brake cutting-off valve is set under a passenger seat to cut a single bogie brake off in the existing urban rail vehicle, but the requirements of an unmanned vehicle cannot be met is solved.

A method, device and system for cutting a bogie brake off are disclosed. The method includes that: when a bogie brake is not able to be relieved, a cutting-off instruction output from an Operating Control Center (OCC) is received, wherein the cutting-off instruction is used for triggering an action of cutting the bogie brake off; a logic operation is performed on the cutting-off instruction to obtain an isolation control instruction; and an electromagnetic valve corresponding to a bogie is controlled to act according to the isolation control instruction, so as to cut the bogie brake off. According to the method, the technical problem that a brake cutting-off valve is set under a passenger seat to cut a single bogie brake off in the existing urban rail vehicle, but the requirements of an unmanned vehicle cannot be met is solved.

A brake system has a first emergency brake control valve, a first emergency brake flow path, which is operatively connected to at least one first compressed-air brake cylinder, an emergency line, and a first switch-over valve, the pneumatic control connection of which is connected to the emergency line. The emergency line is kept at zero pressure during a service operation of the brake system, and pressurized during an emergency operation such that during the service operation, the first switch-over valve is kept in a first position, and during an emergency operation, the first switch-over valve means is kept in a second position. The first position of the first switch-over valve opens the first emergency brake flow path and blocks a first emergency flow path to compressed air controlled by an emergency control valve. The second position blocks the first emergency brake flow path and clears the first emergency flow path.

An electropneumatic valve unit (100, 200) for a vehicle brake system has a plurality of valve sections (102; 104; 106; 108; 204; 206) integrated into a single valve housing (101). The plurality of valve sections (102; 104; 106; 108; 204; 206) includes a front axle redundancy section (102) configured to provide a redundant supply or control pressure for controlling brakes associated with a front axle of a vehicle or a tractor, and a trailer control section (104; 204) for providing supply and/or control pressure to a trailer connected to the tractor. The redundant supply or control pressure for controlling brakes associated with the front axle of the vehicle at the front axle redundancy section (102) is derived from an output pressure of the trailer control section (104; 204).

An electropneumatic valve unit (100, 200) for a vehicle brake system has a plurality of valve sections (102; 104; 106; 108; 204; 206) integrated into a single valve housing (101). The plurality of valve sections (102; 104; 106; 108; 204; 206) includes a front axle redundancy section (102) configured to provide a redundant supply or control pressure for controlling brakes associated with a front axle of a vehicle or a tractor, and a trailer control section (104; 204) for providing supply and/or control pressure to a trailer connected to the tractor. The redundant supply or control pressure for controlling brakes associated with the front axle of the vehicle at the front axle redundancy section (102) is derived from an output pressure of the trailer control section (104; 204).

A parking brake system for electrically controlling a parking brake of a vehicle is provided. The parking brake system includes a parking brake provided for each wheel, an air dryer controller, and an actuator. The air dryer controller is provided to an air dryer to electrically control the parking brake. The air dryer dries compressed air for use in the parking brake. The actuator is provided for each axle of the wheel to actuate the parking brake with the compressed air in accordance with an electric signal from the air dryer controller.

A parking brake system for electrically controlling a parking brake of a vehicle is provided. The parking brake system includes a parking brake provided for each wheel, an air dryer controller, and an actuator. The air dryer controller is provided to an air dryer to electrically control the parking brake. The air dryer dries compressed air for use in the parking brake. The actuator is provided for each axle of the wheel to actuate the parking brake with the compressed air in accordance with an electric signal from the air dryer controller.

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.

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.