Abstract: A brake pressure modulator (110; 106) includes a relay valve (202) for controlling a supply of pressurized air from a primary source (II) to at least one brake actuator (112a, 112b), a first valve sub-unit (204) configured to be electronically actuated and configured to receive a primary control pressure from the primary source (II) intended for operating the relay valve (202), and a second valve unit (206) configured to receive a secondary control pressure from a secondary source (‘BST’) and at least part of the primary control pressure from the primary source (II) and to transmit either the primary control pressure or the secondary control pressure to the relay valve (202). When the secondary control pressure is transmitted to the relay valve (202), the primary control pressure from the primary source (II) is disconnected.

Abstract: A pneumatic device (1) for a brake system (100) includes a housing (3) for receiving electronic components. The housing is in fluid communication with the environment during operation of the pneumatic device (1). An exhaust path (15) having an exhaust port (17) and being in fluid communication with the housing (3) exhausts the pneumatic device (1) to the environment (5) via the exhaust port (17). An exhaust element (10) associated with the exhaust path (15) includes a liquid impermeable but gas permeable barrier between the housing (3) and the environment (5). The pneumatic device may be included in a brake system having such a pneumatic device, a commercial vehicle, and/or a method for assembly thereof.

Abstract: A pneumatic device (1) has at least one venting path (10) for venting the pneumatic device (1) in an outflow direction (R1). The venting path (10) includes a first volume (12), through which a flow can pass, a first compressed-air passage (14), and a sealing mechanism (18). The first compressed-air passage (14) pneumatically connects the first volume (12) to a pressurized part (16) of the pneumatic device (1). The sealing mechanism (18) changes between a normal state (Z1) and a sealing state (Z2). In the normal state (Z1) a flow can pass through the first compressed-air passage (14) both in the outflow direction (R1) and in an oppositely directed inflow direction (R2). In the sealing state (Z2) a flow can pass through the first compressed-air passage (14) only in the outflow direction (R1).