An electrically controllable pneumatic brake system has a front and a rear axle brake circuit, and a manually actuable brake signal transmitter which, upon actuation, outputs a first front brake control pressure and a first rear brake control pressure. A front axle brake pressure is produced based on a front axle braking demand pressure and a rear axle brake pressure is produced based on a rear braking demand pressure. A two-channel pressure modulator system is configured to receive a braking demand signal from an autonomous driving unit and, in response thereto, output the front and rear braking demand pressure, and is further configured to receive the first front and rear brake control pressure and, at least in an error situation, to output the front braking demand pressure depending on the first front brake control pressure and/or the rear braking demand pressure depending on the first rear brake control pressure.

An electrically controllable pneumatic brake system has a front and a rear axle brake circuit, and a manually actuable brake signal transmitter which, upon actuation, outputs a first front brake control pressure and a first rear brake control pressure. A front axle brake pressure is produced based on a front axle braking demand pressure and a rear axle brake pressure is produced based on a rear braking demand pressure. A two-channel pressure modulator system is configured to receive a braking demand signal from an autonomous driving unit and, in response thereto, output the front and rear braking demand pressure, and is further configured to receive the first front and rear brake control pressure and, at least in an error situation, to output the front braking demand pressure depending on the first front brake control pressure and/or the rear braking demand pressure depending on the first rear brake control pressure.

An electropneumatic trailer control-valve unit for a vehicle, including a storage port for coupling a store of compressed air for a trailer, a brake-pressure port, a brake-pressure pilot-control unit configured to output at least one first control pressure, a brake-pressure main-valve unit configured to receive the at least one first control pressure and to output a brake pressure at a brake-pressure port, a trailer operating-pressure port configured to receive a trailer operating pressure, and a pneumatically switched trailer protection valve with a protection-valve control port which is connected to the trailer operating-pressure port for receiving the trailer operating pressure, wherein the trailer protection valve switches from a first switching position into a second switching position if the trailer operating pressure exceeds a predetermined first threshold value, and wherein the trailer operating pressure is a supply control pressure.

An electropneumatic trailer control-valve unit for a vehicle, including a storage port for coupling a store of compressed air for a trailer, a brake-pressure port, a brake-pressure pilot-control unit configured to output at least one first control pressure, a brake-pressure main-valve unit configured to receive the at least one first control pressure and to output a brake pressure at a brake-pressure port, a trailer operating-pressure port configured to receive a trailer operating pressure, and a pneumatically switched trailer protection valve with a protection-valve control port which is connected to the trailer operating-pressure port for receiving the trailer operating pressure, wherein the trailer protection valve switches from a first switching position into a second switching position if the trailer operating pressure exceeds a predetermined first threshold value, and wherein the trailer operating pressure is a supply control pressure.

A wheel assembly for a vehicle comprises a hollow support cylinder extending along an axis and anchored to a frame of the vehicle, and a wheel disposed about the axis, annularly surrounding the hollow support cylinder. The wheel comprises an inner wall and a tire extending radially outward of the inner wall, and anchored thereto. The wheel assembly further comprises first and second sleeve bearings disposed between and abutting the hollow support cylinder and the inner wall, the first sleeve bearing being situated proximal to the frame along the axis, the second sleeve bearing being situated distal to the frame along the axis, and the wheel being rotatably supported on the hollow support cylinder via the first and second sleeve bearings. The wheel assembly further comprises a first direct drive motor disposed axially between the first and second sleeve bearings. The first direct drive motor comprises a first wound stator anchored to the hollow support structure, and a first permanent magnet rotor anchored to the inner wall, axially aligned with the first wound stator and radially outward of the first wound stator.

A vehicle braking system includes brakes, a body, a braking linkage, a service brake comprising a braking piston movable relative to the body to act on the braking linkage and delimiting a service brake pressure chamber to place the braking piston in a service braking position. A parking brake acts on the braking piston and has a working configuration and a resting configuration. The parking brake includes a blocking device movable relative to the body to act on the braking piston and having a first position and a second position in which the blocking device is configured to immobilize the braking piston in a service braking position. A control device is movable relative to the body and has a locking position to hold the blocking device in the second position. A service brake indicator device receives information representing supply and/or venting of the service brake pressure chamber.

A brake system includes a first electric power-supply-unit (EPSU) and a first electronic-brake-control-unit (EBCU). The first EBCU is connected to the first EPSU. Also, the brake system includes a second EPSU and a second EBCU, which is connected to the second EPSU. The brake system further includes a first axle-pressure-modulator (APM) for service-brake-chambers associated with a first vehicle-axle. The brake system includes a second APM for spring-brake-cylinders for a second vehicle-axle. The brake system includes two power-supply-switches (PSS). A first PSS is connected to the first EBCU, the second EBCU and the first APM and configured to connect the first EBCU or the second EBCU to the first APM. A second PSS is connected to the first EBCU, the second EBCU and the second APM and configured to connect the first EBCU or the second EBCU to the second APM.

The present invention relates to a device designed to quickly and efficiently unfreeze a frozen tractor trailer brake system. The device features a junction and T-valve assembly having a removable top plug, a quick connect fitting attached to both a first end of the junction and a tractor emergency brake line, and an outlet pipe attached to both a second end of the junction and the trailer glad hand. A de-icing solution may be introduced into an opening in the T-valve and forced through the trailer brake system by utilizing the air pressure from the tractor's emergency air brake, wherein the de-icing solution quickly and efficiently thaws the frozen brake system.

The present invention relates to a device designed to quickly and efficiently unfreeze a frozen tractor trailer brake system. The device features a junction and T-valve assembly having a removable top plug, a quick connect fitting attached to both a first end of the junction and a tractor emergency brake line, and an outlet pipe attached to both a second end of the junction and the trailer glad hand. A de-icing solution may be introduced into an opening in the T-valve and forced through the trailer brake system by utilizing the air pressure from the tractor's emergency air brake, wherein the de-icing solution quickly and efficiently thaws the frozen brake system.

A circuit has a fluid line matrix and brake components connected to the fluid line matrix. Changes in the brake designs or brake functions can be carried out easily in that at least one interface is provided for connecting a distributor block. The interface is designed such that a configuration of the fluid line matrix can be formed by connecting or exchanging the distributor block. There is also described a distributor block which is suitable for forming a configuration of the fluid line matrix of the circuit by connecting to the at least one interface of the circuit.