A brake actuator for a vehicle includes a cylinder housing having a surface and a wall opening provided in this surface, a brake chamber having a variable volume and a dust plug releasably arranged in the wall opening. The dust plug includes a flexible circumferential lip configured for abutting against the surface of the cylinder housing in a sealing state, and for being flexed away from the surface in a flexed state. The lip is configured to assume the flexed state in response to a positive pressure inside the brake chamber, and to assume the sealing state in response to negative pressure inside the brake chamber. A core section is arranged adjacent to the lip and the core section is configured for extending through the wall opening of the cylinder housing. A pressure compensation flow path is defined between the lip and the brake chamber.

A remote caging system and method for remote caging for semi-trailer brakes is provided. The remote caging system comprises a remote control device, and a remote caging apparatus including a transmitter/receiver. The remote caging apparatus is installed on a semi-trailer truck brake. The remote control device sends and receives signals to and from the transmitter/receiver to engage and disengage the brakes.

The vehicle brake includes a pedal being pressed against for braking by a driver, a master cylinder unit, pressure of oil in the master cylinder being increased by the pedal, a block unit in which a hydraulic circuit unit is formed, the hydraulic circuit unit being connected to the master cylinder unit, being supplied with the oil from the master cylinder unit, and increasing the pressure of the oil when electric power is supplied thereto, a wheel cylinder unit being connected to the block unit and providing a braking force to a wheel, and a filter unit being mounted on the block unit and filtering the oil provided from the master cylinder unit.

The vehicle brake includes a pedal being pressed against for braking by a driver, a master cylinder unit, pressure of oil in the master cylinder being increased by the pedal, a block unit in which a hydraulic circuit unit is formed, the hydraulic circuit unit being connected to the master cylinder unit, being supplied with the oil from the master cylinder unit, and increasing the pressure of the oil when electric power is supplied thereto, a wheel cylinder unit being connected to the block unit and providing a braking force to a wheel, and a filter unit being mounted on the block unit and filtering the oil provided from the master cylinder unit.

A system for monitoring stroke of a spring brake actuator of a vehicle comprises a spring brake actuator having a push rod, wherein pneumatic activation of the spring brake actuator causes the push rod to further extend out of the spring brake actuator to thereby activate braking of the vehicle, and wherein pneumatic deactivation of the spring brake actuator causes the push rod to retract back into the spring brake actuator to thereby deactivate braking of the vehicle. A first magnet and a second magnet are coupled to the push rod, and the second magnet is spaced apart from the first magnet. A sensor is configured to sense a magnetic field created by the first magnet and the second magnet, and a controller is configured to determine stroke of the push rod based the magnetic field.

A parking brake apparatus is provided for an autonomously drivable vehicle having components of a parking brake system for applying a parking brake. The parking brake apparatus comprises a first controller arranged to provide one or more control signals to be applied to components of the parking brake system to apply the parking brake in response to a signal requesting the parking brake to be applied. The parking brake apparatus also comprises a second controller arranged to provide one or more control signals to be applied to other components of the parking brake system to apply the parking brake in response to unavailability of the first controller to cause the parking brake to be applied.

A parking brake apparatus is provided for an autonomously drivable vehicle having components of a parking brake system for applying a parking brake. The parking brake apparatus comprises a first controller arranged to provide one or more control signals to be applied to components of the parking brake system to apply the parking brake in response to a signal requesting the parking brake to be applied. The parking brake apparatus also comprises a second controller arranged to provide one or more control signals to be applied to other components of the parking brake system to apply the parking brake in response to unavailability of the first controller to cause the parking brake to be applied.

A piston tube assembly (17) for a spring brake actuator (1) includes a first tubular body (35) having a contoured inside surface profile (55) for non- rotationally guiding a running nut (21) of a mechanical release mechanism (19, 21), and an internal breather valve (41) mounted to the piston tube assembly (17) for allowing fluid transport into and out of the piston tube assembly and any volume in fluid communication therewith. The piston tube assembly (17) includes a second tubular body (37) that is of a different material than the first tubular body (35), which encloses the first tubular body (35) and mechanically supports the first tubular body (35), and the internal breather valve (41) is mounted to the first tubular body (35).

The invention relates to an electromechanical brake pressure generator (14) for a hydraulic braking system (10) of a vehicle. The electromechanical brake pressure generator (14) includes at least one threaded drive assembly (40) for converting a drive-side rotation into a translation for brake pressure generation. The threaded drive assembly (40) includes a spindle (68), which is rotatable via an electric motor (38), and a spindle nut (80), which is situated on a thread (76) of the spindle (68) in such a way that the spindle nut (80) and a hydraulic piston (92) formed thereon are axially displaceable upon rotation of the spindle (68). In addition, the threaded drive assembly (40) includes a housing (64), which forms a hydraulic cylinder (66) corresponding to the hydraulic piston (92), in which the spindle (68) and the spindle nut (80) are accommodated, and a rotation lock (84, 88), via which the spindle nut (80) is secured against rotation upon rotation of the spindle (68).

The invention relates to an electromechanical brake pressure generator (14) for a hydraulic braking system (10) of a vehicle. The electromechanical brake pressure generator (14) includes at least one threaded drive assembly (40) for converting a drive-side rotation into a translation for brake pressure generation. The threaded drive assembly (40) includes a spindle (68), which is rotatable via an electric motor (38), and a spindle nut (80), which is situated on a thread (76) of the spindle (68) in such a way that the spindle nut (80) and a hydraulic piston (92) formed thereon are axially displaceable upon rotation of the spindle (68). In addition, the threaded drive assembly (40) includes a housing (64), which forms a hydraulic cylinder (66) corresponding to the hydraulic piston (92), in which the spindle (68) and the spindle nut (80) are accommodated, and a rotation lock (84, 88), via which the spindle nut (80) is secured against rotation upon rotation of the spindle (68).