A brake system includes a pneumatic circuit provided with a first and a second passage that supply compressed air from an air tank that stores compressed air to a brake booster; and a control unit that controls a proportional control valve arranged on the second passage. The control unit includes a first signal generator configured to generate a first signal that is a pulse signal having a first frequency and indicates a drive amount of the proportional control valve. The control unit also includes a second signal generator configured to generate a second signal that is a pulse signal having a second frequency, which is less than or equal to one-tenth of the first frequency. The control unit further includes a third signal generator configured to generate a command signal for the proportional control valve by multiplying the first signal by the second signal.

A brake system includes a pneumatic circuit provided with a first and a second passage that supply compressed air from an air tank that stores compressed air to a brake booster; and a control unit that controls a proportional control valve arranged on the second passage. The control unit includes a first signal generator configured to generate a first signal that is a pulse signal having a first frequency and indicates a drive amount of the proportional control valve. The control unit also includes a second signal generator configured to generate a second signal that is a pulse signal having a second frequency, which is less than or equal to one-tenth of the first frequency. The control unit further includes a third signal generator configured to generate a command signal for the proportional control valve by multiplying the first signal by the second signal.

In order to provide a pneumatic system for motor vehicles, which system is lightweight and environmentally friendly and furthermore flexible with respect to further developments and adaptations to modern vehicle systems, the invention proposes a pneumatic system for motor vehicles, comprising at least one compressed air reservoir, a compressor, a valve unit that can be controlled by a control unit and a pipe system, in order to supply compressed air that has been generated by means of the compressor and stored in the compressed air reservoir to an operable actuator.

In order to provide a pneumatic system for motor vehicles, which system is lightweight and environmentally friendly and furthermore flexible with respect to further developments and adaptations to modern vehicle systems, the invention proposes a pneumatic system for motor vehicles, comprising at least one compressed air reservoir, a compressor, a valve unit that can be controlled by a control unit and a pipe system, in order to supply compressed air that has been generated by means of the compressor and stored in the compressed air reservoir to an operable actuator.

An air disc brake system for a heavy-duty vehicle comprising an axle. A spindle is attached to an end portion of the axle. At least a portion of an air disc brake assembly is supported by the spindle. A suspension beam has an axle support portion connectable with the axle. An end portion of the suspension beam is spaced from the axle support portion for attachment with the heavy-duty vehicle. The suspension beam may pivot about the end portion of the suspension beam. An actuator actuates the air disc brake assembly. The actuator has a movable member to actuate the air disc brake assembly. Structure is associated with the suspension beam for supporting at least a portion of the actuator. A surface defines an opening in the suspension beam through which the movable member may extend or that may receive and support a portion of the actuator.

An air disc brake system for a heavy-duty vehicle comprising an axle. A spindle is attached to an end portion of the axle. At least a portion of an air disc brake assembly is supported by the spindle. A suspension beam has an axle support portion connectable with the axle. An end portion of the suspension beam is spaced from the axle support portion for attachment with the heavy-duty vehicle. The suspension beam may pivot about the end portion of the suspension beam. An actuator actuates the air disc brake assembly. The actuator has a movable member to actuate the air disc brake assembly. Structure is associated with the suspension beam for supporting at least a portion of the actuator. A surface defines an opening in the suspension beam through which the movable member may extend or that may receive and support a portion of the actuator.

The disclosure relates to a brake system for vehicles, comprising a brake unit. In order to provide a new brake system, which is in particular more lightweight and more environmentally friendly, a brake unit is proposed which comprises at least a brake disc and a brake piston unit, a compressed air reservoir, and a control unit in order to pressurise the brake piston unit with compressed air from the compressed air reservoir on demand.

The disclosure relates to a brake system for vehicles, comprising a brake unit. In order to provide a new brake system, which is in particular more lightweight and more environmentally friendly, a brake unit is proposed which comprises at least a brake disc and a brake piston unit, a compressed air reservoir, and a control unit in order to pressurise the brake piston unit with compressed air from the compressed air reservoir on demand.

In a method of braking a number of rail cars of a train travelling on a mainline track, in response to a unique braking command provided to each rail car of a first subset of rail cars, wherein each braking command includes a level or percentage of braking the brakes of the rail car are to assume, the brakes of the rail car are set to level or percentage of braking included in the unique braking command provided to the rail car. Thereafter, in response to a unique braking command provided to each rail car of a second, different subset of rail cars, the brakes of the rail car are set to level or percentage of braking included in the unique braking command provided to the rail car.

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.