A system for recharging a railcar air-brake system for a road-rail vehicle, including a rail-capable material handler, adapted or modified for transporting an at least one railcar that permits an air compression system to provide a near-constant low-volume airflow to recharge the respective air-brake systems without requiring the road-rail vehicle to be driven. The system can generally comprise a hydraulic pump, an air compressor, and at least one railcar air-brake system. The system can be adapted for recharging railcar air-brake systems for a road-rail vehicle adapted for transporting at least two railcars that does not significantly diminish the utility of the road-rail vehicle.

A system for recharging a railcar air-brake system for a road-rail vehicle, including a rail-capable material handler, adapted or modified for transporting an at least one railcar that permits an air compression system to provide a near-constant low-volume airflow to recharge the respective air-brake systems without requiring the road-rail vehicle to be driven. The system can generally comprise a hydraulic pump, an air compressor, and at least one railcar air-brake system. The system can be adapted for recharging railcar air-brake systems for a road-rail vehicle adapted for transporting at least two railcars that does not significantly diminish the utility of the road-rail vehicle.

A pneumatic brake system (110) for a commercial vehicle (1) has one spring brake (27), a protection valve (56), a parking brake unit (30), a network of pipelines (40), at least a first (4) and a second (5) tank with compressed air and a relay valve (19) for the parking brake unit (30). A first subnetwork of pipelines (40a) comprises pipelines configured to be pressurized at all times. A second subnetwork of pipelines (40b) comprises at least one pipeline configured to be non-pressurized when the parking brake function is applied. The first subnetwork (40a) comprises pipelines establishing fluid communication between the tanks (4, 5) and the parking brake unit (30), wherein the direction of air flow in these pipelines is by at least one thereto associated valve (50). A method for managing an air flow to an air-actuated spring brake (27) of a pneumatic brake system (110) is disclosed.

Compressed air supplied into a housing is expanded for reducing air humidity in the housing in response to the expansion of the compressed air. As a result, it is possible in a simple manner for a component to be operated in a dry environment. The component can be dried and condensation on the component can be prevented.

Compressed air supplied into a housing is expanded for reducing air humidity in the housing in response to the expansion of the compressed air. As a result, it is possible in a simple manner for a component to be operated in a dry environment. The component can be dried and condensation on the component can be prevented.

The application discloses a method for controlling a pneumatic brake system of a vehicle. The method includes the step of modulating a pilot-control brake pressure by means of an electropneumatic pilot-control valve in venting phases and bleeding phases. The method also includes the step of feeding in the pilot-control pressure via a pilot-control line for outputting a brake pressure to wheel brakes of the vehicle.

The application discloses a method for controlling a pneumatic brake system of a vehicle. The method includes the step of modulating a pilot-control brake pressure by means of an electropneumatic pilot-control valve in venting phases and bleeding phases. The method also includes the step of feeding in the pilot-control pressure via a pilot-control line for outputting a brake pressure to wheel brakes of the vehicle.

A control valve for automatic compressed-air brakes forms a brake cylinder pressure in at least one connected brake cylinder in accordance with a pressure difference between a pressure in a continuous main air line of a train and a stored reference pressure, which is drawn from the pressure of the main air line, comprising valve means for drawing a control pressure from the pressure of the main air line in order to produce a brake cylinder pressure for applying to the brake cylinder. A first piston system provides the control pressure from the pressure of the main air line and a valve mechanism for producing the brake cylinder pressure, wherein a short-stroke first piston system actuates the accelerating element in the same valve housing interacts with a second piston system for actuating the valve mechanism, the second piston system being of longer stroke in relation to the first piston system.

A parking brake apparatus is provided for a power unit having air brake parking components and to which a towed unit having air brake parking components can be connected. The parking brake apparatus comprises a controller arranged to monitor a pressure signal indicative of a delivery air pressure applied to the air brake parking components of the towed unit when the towed unit is connected to the power unit. The controller is also arranged to provide a status signal indicative of whether or not a towed unit is connected to the power unit based upon the pressure signal. The controller further enables the status signal to be processed to control application or release of any combination of air brake parking components of the power unit and the towed unit to park or unpark the power unit as well as the towed unit, if connected to the power unit.

Techniques for braking an autonomous vehicle include providing a pressurized fluid stream from a plurality of pressurized fluid sources to a plurality of pressure-controlled electronic braking assemblies; providing the pressurized fluid stream from a pressurized fluid control output of a first pressure-controlled electronic braking assembly directly to a pressurized fluid control input of a second pressure-controlled electronic braking assembly; providing the pressurized fluid stream from the second pressure-controlled electronic braking assembly to at least one vehicle brake set; providing sensor output data from one or more vehicle sensors to a plurality of electronic control units; and based at least in part on the sensor output data, controlling at least one of the first or second pressure-controlled electronic braking assemblies to adjust a pressure of the pressurized fluid stream from at least one of the first or second pressure-controlled electronic braking assemblies to the vehicle brake set.