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).

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.

An electropneumatic brake control module (1) has a supply connection (2) for connecting a compressed air supply (3); a first wheel brake connection (4) and a second wheel brake connection (6); a pneumatically controlled inlet-outlet valve unit (8) for controlling a first brake pressure (PB1) at the first wheel brake connection (4) and a second brake pressure (PB2) at the second wheel brake connection (6), which is independent of the first brake pressure (PB1); and an electropneumatic pilot control unit (10) for controlling at least one main control pressure (PH) at a main valve (12) of the inlet-outlet valve unit (10). The main valve (12) of the inlet-outlet valve unit (10) is a pneumatically controllable 3/2-way valve (13) with a main valve control connection (12.4).

The invention concerns an electronic parking brake system (2), comprising an air supply (4), a check valve (6), connected to the air supply, an electro-pneumatic control unit (8), at least one park brake actuator (10), a relay valve (12), comprising a first port (12a) connected to the check valve, a second port (12b) connected to the electro-pneumatic control unit, a third port (12c) connected to the park brake actuator and a fourth port (12d) which is in communication with the atmosphere, and an electrically actuated valve (14), which is controlled by the electro-pneumatic control unit (8) and which includes a first orifice (14a) connected to a compressed air line (16) extending between the check valve and the air supply, a second orifice (14b), a third orifice (14c) connected to the electro-pneumatic control unit (8), and preferably a vent orifice. The second orifice (14b) is connected to another compressed air line (18) extending between the check valve (6) and the first port (12a) of the relay valve (12).

An electropneumatic brake system, for a commercial vehicle which is provided for pulling a trailer, includes at least one service brake circuit configured to activate service brake actuators, a parking brake circuit having parking brake actuators on at least one axle, a trailer brake circuit configured to provide a trailer brake pressure at a trailer brake pressure port, and a manually actuatable operating unit in a driver's cab. The manually actuatable operating unit has a first operating element and a second operating element. In the case of actuation of the first operating element when the vehicle is driving, the parking brake actuators are activated and a trailer brake pressure is output at the trailer brake pressure port. In the case of actuation of the second operating element when the vehicle is driving, only a trailer brake pressure is output.

A foot brake module of an electropneumatic brake system of a motor vehicle has at least two pneumatic brake circuits. The foot brake module is operated by a brake pedal and has a pneumatic section with a pneumatic brake control valve and an electrical section with an electrical switch and at least one electronic travel sensor. The electrical switch is activated in a contactless manner. The foot brake module may have two travel sensors that each have a separate power supply and are connected to different electronic control devices.

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 locked in as required.

A control system for wheel-slip prevention in a railway vehicle with a pneumatic brake is provided. The control system comprises an input interface configured to accept a deceleration reference for controlling the pneumatic brake, and a memory configured to store a reference governor providing executable instructions for modifying the deceleration reference upon its violation of a wheel-slip constraint, and configured to store a controller providing executable instructions for mapping the modified deceleration reference to a sequence of control commands for controlling pressure applied by the pneumatic brake. The control system further comprises a processor configured to execute the reference governor to modify the deceleration reference and configured to execute the controller to map the modified deceleration reference to the sequence of control commands. Further, an output interface of the control system is configured to output the sequence of control commands to control the pneumatic brake.

An apparatus for generating non-electric control signals for a brake system, which has a first supply source, including: at least one interface configured to be connected to a pressure accumulator; and at least one interface to output the control signals; in which the apparatus is configured to be supplied via a second supply source. Also described are a related module and an electronic brake system.

Electronically controlled pneumatic brake system and method for an automotive vehicle, said system comprising a front axle brake module (FBM) for providing pneumatic control pressure to the left and right front pneumatic brake actuators (FW-L, FW-R), one or more rear axle brake module (RBM) for providing pneumatic control pressure to the left and right rear pneumatic brake actuators (RW-L,RW-R), an air production module (6) selectively providing air under pressure to said front and rear axles electronic brake modules via a first air supply circuit (AC1) for the rear axle, a second air supply circuit (AC2) for the front axle, first and second air reservoirs (R1,R2), respectively coupled to first and second air supply circuits, and a third reservoir (R3) and a third air supply circuit (AC3) connected to the third reservoir (R3), for providing a redundant pneumatic supply to the front and rear axle brake modules, the third air supply circuit (AC3) providing same braking performance as the first air supply circuit (AC1) for the rear axle and same braking performance as the second air supply circuit (AC2) for the front axle.