A brake system is provided for a trailer vehicle having a plurality of axles, each of which has a wheel end on a respective side of the vehicle, the brake system including first and second pneumatic circuits for supplying air pressure to brake devices at the wheel ends. The system includes a spring brake modulator valve arrangement adapted to control pressure to spring brakes on the vehicle, which modulator valve arrangement receives an input from at least one of the pneumatic circuits and a control pressure from the trailer brake module. Flow of air to the brakes is controllable either by the trailer brake module or by the spring brake modulator valve arrangement to provide redundancy.

An electropneumatic parking brake module (1) includes a supply connection (2), a spring-type actuator connection (4), an inlet-outlet valve unit (10) having a first switching position and a second switching position, and an electropneumatic pilot control unit (12) for outputting at least a first control pressure (p1) at the inlet-outlet valve unit (10). In the first switching position of the inlet-outlet valve unit (10), a spring brake pressure (pF) can be fed through directly from the supply connection (2) to the spring-type actuator connection (4) by virtue of the fact that the spring-type actuator connection (4) is connected to the supply connection (2), and, in the second switching position of the inlet-outlet valve unit (10), when the first control pressure (p1) is below a first threshold value, the spring-type actuator connection (4) is connected to a ventilating connection (14.3) of the inlet-outlet valve unit (10).

An electropneumatic brake system (EBS) of a vehicle, which electronically controls a brake-pressure, including: a) a service-brake actuating-element, which is actuatable by a driver, of a service-brake-actuating-device, which has an electrical-channel and at least one pneumatic-channel, wherein, depending on the actuation of the service-brake-actuating-element, an electrical-brake-request-signal, representing a setpoint-brake-pressure, is generated in the electrical-channel and a pneumatic-backup-pressure is generated in the pneumatic-channel; b) a first electronic-control-system, which, depending on a brake-request-signal output by the electrical-channel, outputs an electrical-brake-control-signal; c) at least one electropneumatic-pressure-control-module, which, depending on the electrical-brake-control-signal, outputs an actual-brake-pressure, in the course of a brake-pressure-control adjusts the actual-brake-pressure to the setpoint-brake-pressure and inputs this into at least one pneumatic-brake-actuator; d) wherein the pressure-control-module includes at least one electromagnetic-control-valve-device (EV, AV), at least one relay-valve (RLV), at least one electromagnetic-backup-solenoid-valve (BV), a second electronic-control-system and at least one pressure-sensor (DS), wherein, depending on the electrical-brake-control-signal, the electromagnetic-control-valve-device (EV, AV) generates a control-pressure for a control-input of the relay-valve (RLV), which, depending on the control-pressure, generates an actual-brake-pressure for the at least one pneumatic-brake-actuator, which the pressure-sensor (DS) measures/reports to the second electronic-control-system of the pressure-control-module, e) wherein the electromagnetic-control-valve-device (EV, AV) and the at least one electromagnetic-backup-solenoid-valve (BV) are electrically-controlled by the second electronic-control system, f) wherein the electromagnetic-backup-solenoid-valve (BV) is connected by an input to the pneumatic-channel and by an output to the control-input of the relay-valve (RLV) and can be switched between a pass-through-position, in which the input is connected to the output, and a shut-off position, in which the input is shut-off with respect to the output, g) wherein the electromagnetic-control-valve-device (EV, AV) connects the control-input of the relay-valve (RLV) to a pressure-sink or to a compressed-air-supply or shuts it off from the pressure-sink and from the compressed-air-supply, h) wherein a pneumatic-backup-brake-circuit of the electropneumatic-brake-system includes at least the pneumatic-channel of the service-brake-actuating-device, the relay-valve (RLV), the at leas

An electronic control unit for a vehicle, including: a pressure-sensor-element (PSE); a housing having a pressure-guide by which the PSE has a pressure-medium applied to it under pressure; an evaluation-unit to generate a pressure-signal, dependent on the pressure detected by the pressure-sensor-element in the pressure-guide; and a circuit-carrier on which at least part of control-electronics of the control-unit is arranged; the pressure-signal of the evaluation-unit being put in the control-electronics, the pressure-guide making direct contact with the circuit-carrier and a sealing-element arranged in the contact-region between the pressure-guide and the circuit-carrier, the sealing-element sealing a region of the pressure-guide to which the pressure-medium is applied under pressure from the surroundings, the PSE being arranged directly on the circuit-carrier, such that the PSE is arranged in the region of the pressure-guide to which the pressure-medium is applied under pressure, and the evaluation-unit being electrically directly connected to the circuit-carrier.

A control valve for applying a spring-loaded brake pressure to spring-loaded parts of a rear-axle wheel brake is pneumatically activated as a function of a parking-brake braking demand and a service-brake braking demand. A first control chamber is connected via a first control piston to a control arrangement in the control valve. During an adjustment of the first control chamber via the service-brake control pressure, the spring-loaded brake pressure at the working output is a function of the service-brake control pressure or of the parking-brake control pressure. The first control piston is connected to a third control chamber, wherein the pressure in the first control chamber acts on the first control piston in one direction, and the pressure in the third control chamber acts on the first control piston in the opposite direction. The first control chamber is selectively connectable to the third control chamber via a switchable bypass valve.

A brake control device (10) for delivering air under controlled pressure to a pneumatic brake actuator (BA), comprising an inlet port (51) coupled to a compressed air supply circuit, a working port (54) coupled to a service brake chamber (C2) of the brake actuator (BA), a venting port (56), first and second inlet solenoid valves (31,32) for selectively connecting inlet port(s) to the working port, first and second outlet solenoid valves (41,42) for selectively connecting the working port to venting port(s), a biased check valve (12), for coupling the working port to venting port(s), the brake control unit device further comprising first and second local electronic control units (21,22) for controlling independently first and second inlet solenoid valves and first and second outlet solenoid valves.

A control valve (12) for applying a spring-loaded brake pressure (p3b) to spring-loaded parts of a rear-axle wheel brake is provided. The control valve (12) is activatable pneumatically via a second control input (12b) with a parking-brake control pressure (p5). The parking-brake control pressure (p5) can act in such a manner on a control mechanism (14b, 15b, 17c, 22, 23, 24) arranged in a valve housing (12f) of the control valve (12) that a spring-loaded brake pressure (p3b) arises at a control output (12c) of the control valve (12) as a function of the parking-brake control pressure (p5) for bringing about a parking-brake braking specification with the spring-loaded parts of the rear-axle wheel brakes. The control valve (12) has a first control connection (12a) connectable to an adjustable first control chamber (14a), which is operatively connected to the control mechanism (14b, 15b, 17c, 22, 23, 24).

An axle valve module of a compressed air brake system includes a relay valve with a control pressure input connected to a control pressure line which can be connected via a changeover valve alternately to a brake pressure line conducting an introduced brake pressure or to a reservoir pressure line conducting a reservoir pressure. ABS inlet and outlet valves are each formed as a pressure-controlled diaphragm valve with assigned pilot valve, wherein the pilot valves are configured as cyclically controllable 3/2-way magnetic switching valves, A shut-off valve is arranged in the control pressure line of the relay valve, between the changeover valve and the control pressure input of the relay valve or the branch point of a control pressure line of the ABS valves, via which shut-off valve the control pressure present at the control pressure input of the relay valve can be included as required.

A relay valve module for an electronically controllable pneumatic brake system for actuating wheel brakes of a utility vehicle includes: a reservoir connection for receiving a reservoir pressure; a brake control pressure connection for receiving a brake control pressure; at least one first service brake connection for outputting a service brake pressure; a relay valve with a relay valve reservoir connection, which is connected to the reservoir connection, a relay valve working connection, which is connected to the first service brake connection, a relay valve ventilation connection, and a relay valve control connection; an electropneumatic pilot control unit, which is connected to the reservoir connection, the electropneumatic pilot control unit providing a pilot control pressure; and a shuttle valve with a first shuttle valve inlet, a second shuttle valve inlet, and a shuttle valve outlet. The first shuttle valve inlet is connected to the brake control pressure connection.

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.