A method for activating a fluid solenoid valve in a fluid system of a vehicle, in which, in order to set a switching mode, an activation voltage is applied to a coil arrangement of the fluid solenoid valve. The activation voltage is set depending on an operating criterion to at least two different operating modes, wherein, in a first operating mode, a current regulation of the coil current flowing through the coil arrangement is performed, and in a second operating mode, differing from the first operating mode, the activation voltage is set without the current regulation.

An air brake relay valve includes an air guide unit having a movable set, a drive unit having a motor and a worm shaft, and a cam unit having a transmission member and a driven member. During a brake action, the motor rotates the worm shaft to rotate the transmission member so as to push the driven member downward to thereby move the movable set to a communicating position where a first valve opening and a second valve opening fluidly communicate with each other. When the brake action is released, the motor rotates reversely so that the driven member is moved upward and that the movable set moves, without being applied with additional force, to a non-communicating position where the first and second valve openings do not fluidly communicate.

An air brake relay valve includes an air guide unit having a movable set, a drive unit having a motor and a worm shaft, and a cam unit having a transmission member and a driven member. During a brake action, the motor rotates the worm shaft to rotate the transmission member so as to push the driven member downward to thereby move the movable set to a communicating position where a first valve opening and a second valve opening fluidly communicate with each other. When the brake action is released, the motor rotates reversely so that the driven member is moved upward and that the movable set moves, without being applied with additional force, to a non-communicating position where the first and second valve openings do not fluidly communicate.

A valve module is provided for enabling a vehicle to control an autonomous event of the vehicle. The valve module comprises a relay valve, a first solenoid valve, and a second solenoid valve. A first control pressure can be delivered through the first solenoid valve and applied to a control port of the relay valve. In one embodiment, a second control pressure can be delivered through the second solenoid valve and combined with the first control pressure. The combined first and second control pressures are applied to the control port of the relay valve.

When a brake system on a commercial vehicle, lateral acceleration and/or yaw of the vehicle are monitored and compared to a first predetermined threshold. If the first predetermined threshold is exceeded, a precharge command is sent to the brake system to precharge one or more air chambers by temporarily deactivating a modulator valve and activating an antilock traction relay valve in order to charge the air chambers up to a level permitted by the modulator valve. Upon detecting a panic braking event, a command signal is sent to the brake system to release the precharged air to facilitate braking.

A valve unit (1, 1) for modulating the pressure in a pneumatic brake system, has a brake pressure inlet (3), a brake pressure outlet (4) and a venting outlet (5), a pneumatically controllable main valve (6, 7) and a pilot valve (8, 9), embodied as a solenoid valve and assigned to the main valve (6, 7), which are arranged in a valve housing (2, 2) subdivided by a plane of division (10), into a main housing (11, 11) and a housing cover (12). For fixing the housing cover (12) on the main housing (11, 11) a bracket element (62.1) is fixed to the main housing (11, 11) and bears with a largely planar pressure plate (63) generating an elastic prestressing force on a planar outside wall (64) of the housing cover (12) oriented parallel to the plane of division (10) of the valve housing (2, 2).

An electromagnetic valve device having a fluid inlet port (1), which is formed in a valve casing (10), for a fluid to be switched, in particular pneumatic fluid, a working port (2), which is realized in the valve casing, for the fluid and locking component(s) (14), which are moveably guided in the valve casing along an axial direction and which are realized for interacting with a valve seat (26) formed in the valve casing and opening a fluid flow path between the fluid inlet port and the working port and which are moveably realized via fluid switched by means of electromagnetic positioning means (32).

An electromagnetic valve device having an armature (18) designed such that it can move in an axial direction in a valve housing (10) in response to energising of a stationary coil (12) provided in the valve housing, and which interact with a first valve seat (22) associated with a fluid inlet connection (26) of the valve housing, wherein a first fluid flow path (36) is formed in the valve housing such that fluid flowing through the opened first valve seat can flow in order to actuate a plunger (32) provided axially or axially parallel to the armature (18) and moveable relative to same and to which a preloading force is applied, and the actuation causes a second valve seat (43) interacting with the plunger (32) to be opened to produce a fluid connection to a fluid working connection (42) of the valve housing, and wherein the valve housing has fastening structure (44, 46) in the form of at least one hole extending at an angle, to the axial direction, wherein the fluid inlet connection (26) and the working connection (42), provided adjacent thereto, is formed on the same axial side of the valve housing in relation to the fastening structure.

A solenoid valve with an integrated check valve functionality is provided. The solenoid valve comprises first, second, and third ports. The solenoid valve further comprises an armature movable between a first position in which fluid flow from the second port to the third port is blocked and fluid flow from the first port to the third port is unblocked and a second position in which fluid flow from the second port to the third port is unblocked and fluid flow from the first port to the third port is blocked until fluid pressure at the first port exceeds fluid pressure at the third port by a predetermined amount of fluid pressure to thereby provide the check valve functionality. The check valve functionality is integral to the armature. The solenoid valve also comprises an energizeable solenoid for, when energized, moves the armature from the first position to the second position.

When a brake system on a commercial vehicle, lateral acceleration and/or yaw of the vehicle are monitored and compared to a first predetermined threshold. If the first predetermined threshold is exceeded, a precharge command is sent to the brake system to precharge one or more air chambers by temporarily deactivating a modulator valve and activating an antilock traction relay valve in order to charge the air chambers up to a level permitted by the modulator valve. Upon detecting a panic braking event, a command signal is sent to the brake system to release the precharged air to facilitate braking.