摘要:
A valve control unit, particularly for a pressure modulator of a commercial vehicle includes a valve control housing, solenoid valves, which are provided with solenoids and internal valve pieces inserted into the solenoids, and a pneumatic interface. The solenoids are accommodated inside the valve control housing. Pressure sensors for measuring pneumatic pressures are accommodated in or on the valve control unit, preferably on the top surface. Valve bores, into which the internal valve pieces are inserted, extend within the valve control housing. Air ducts extend between the pneumatic interface, the valve bores, and the pressure sensors, inside the valve control housing. The solenoids and pressure sensors are contacted with an electrical interface. The valve control housing can be a single piece.
摘要:
A valve control unit including three valve units for two brake channels of an electropneumatic brake system is provided. Each valve unit is embodied as a valve modulator device for a braking pressure control circuit including an air inlet valve with a primary solenoid and a bleed valve with a secondary solenoid. Each modulator device armature includes a common solenoid guide arrangement controlled by the magnetic flux of a common magnetic coil. Independent operation of the armatures is achieved whereby flux through the secondary solenoid is weakened by a shunt in the flux circuit which causes a switching delay for the secondary solenoid relative to the primary solenoid. The magnetic resistance of a non-magnetic disc effects switch-off acceleration in the flux circuit with energized secondary solenoid, weakens the field and causes the secondary solenoid to revert to a spring-loaded base state at a higher flux than the primary solenoid.
摘要:
The invention relates to a two-stage solenoid valve for an electropneumatic valve control unit, particularly a pilot control unit of a pressure modulator. Said solenoid valve at least comprises a solenoid system (6) to which a first and second current intensity can be applied as well as a solenoid valve device (8) that is accommodated in the solenoid system (6) and is provided with a primary side (8a) to be connected to a first compressed-air supply and a secondary side (8b) to be connected to a second compressed-air supply. A primary valve (10) encompassing an adjustable primary armature (10a) that is biased by means of a primary armature spring (10c) is provided on the primary side, while a secondary valve (11) encompassing an adjustable secondary armature (11a) which is biased by means of a secondary armature spring (11c) is provided on the secondary side. The solenoid valve device (8) is embodied as a valve cartridge which is to be inserted from one side. Advantageously, the diameters or a forward zone (18a) and a central zone (18c) of the valve cartridge (8) are smaller than or identical to the diameter of a rear zone of the valve cartridge, “forward” being in relation to the direction of insertion.
摘要:
The invention relates to a valve control unit, particularly for a pressure modulator of a commercial vehicle. Said valve control unit (1) comprises a valve control housing (2), solenoid valves (4, 5, 6) which are provided with solenoids (16) and internal valve pieces (4a, 5a, 6a) inserted into the solenoids (16), and a pneumatic interface (14). The solenoids (16) are accommodated inside the valve control housing (2). Pressure sensors (10) for measuring pneumatic pressures are accommodated in or on the valve control unit, preferably on the top surface. Valve bores (3), into which the internal valve pieces (4a, 5a, 6a) are inserted, extend within the valve control housing (2). Air ducts (12) extend between the pneumatic interface (14), the valve bores (3), and the pressure sensors (10), inside the valve control housing (2). The solenoids (16) and pressure sensors (10) are contacted with an electrical interface (8). Advantageously, the valve control housing (2) is embodied as a single piece.
摘要:
A solenoid-valve unit for an electropneumatic controller, especially a pilot-control unit of an electropneumatic pressure modulator of a vehicle, includes a solenoid-valve unit having a valve-housing bottom with compressed-air bores, and solenoid valves having solenoids and displaceable magnet armatures. The solenoids are disposed outside of the valve-housing bottom. At least one pressure sensor for measuring pneumatic pressure in a compressed-air bore of the valve-housing bottom is placed in or on the valve-housing bottom. Electric leads to the solenoids and to the pressure sensor are routed to a common electrical interface.
摘要:
A mechatronic device comprising a housing that encompasses a mechanical part and an electronic part is provided. The mechanical part includes one or more solenoid valves and pressure-directing ducts. The electronic part includes a printed circuit board with electronic components. Sensor modules are incorporated in the pressure-directing ducts to measure physical parameters. In order to minimize electrical connection and separate seals for the sensor modules, the sensor modules wirelessly communicate with at least one reading station located on the circuit board by means of radio technology or light-emitting and light sensitive elements.
摘要:
The invention relates to a valve control unit, made up of three valve units, preferably as a pilot unit (1) for two brake channels of an electropneumatic brake system, whereby each valve unit is embodied as a valve modulator device (7) for a braking pressure control circuit made up of an air inlet valve (22) with a primary solenoid (22a) and a bleed valve (23) with a secondary solenoid (23a), whereby each armature is provided with a common solenoid guide arrangement (10), controlled by the magnetic flux of a common magnetic coil (11). According to the invention, an independent operation of the armatures may be achieved, whereby, the flux through the secondary solenoid (23a) is weakened by a shunt (20) in the total magnetic flux circuit (3) which causes a switching delay for the secondary solenoid (23a) relative to the primary solenoid (22a) and, furthermore, the magnetic resistance of a non-magnetic disc (25) is effective for switch-off acceleration in the magnetic flux circuit (3) with energized secondary solenoid (23a), and weakens the field and causes the secondary solenoid (23a) to revert the spring-loaded base state thereof at a higher magnetic flux than the primary solenoid (22a).
摘要:
For a valve arrangement of a pneumatically actuated, spring-loaded control cylinder, a non-return valve in pneumatic communication with the control cylinder piston chamber. At very low backpressures in the control cylinder piston chamber caused by leaks of the valve responsible for pressurization of the piston chamber, the chamber is vented by passage of a very small air stream via the non-return valve. In this way, leaks cannot cause a very slow pressure buildup in the control cylinder piston chamber, followed at some time by undesired shifting of the control cylinder. In contrast, in the case of normal pressure buildup, i.e., during switching of the pressurizing valve, the non-return valve is promptly closed and the pressure in the control cylinder piston chamber is not influenced.
摘要:
A two-stage solenoid valve for an electropneumatic valve control unit, e.g., a pilot control unit of a pressure modulator, includes a solenoid system to which a first and second current intensity can be applied as well as a solenoid valve device with a primary side connectable to a first compressed-air supply and a secondary side connectable to a second compressed-air supply. A primary valve encompassing an adjustable primary armature biased by a primary armature spring is provided on the primary side, and a secondary valve encompassing an adjustable secondary armature biased by a secondary armature spring is provided on the secondary side. The solenoid valve device can be a valve cartridge insertable from one side. Diameters of a front (in relation to insertion direction) region and a central region of the valve cartridge are smaller than or equal to the diameter of a rear region of the valve cartridge.
摘要:
A solenoid-valve unit for an electropneumatic controller, especially a pilot-control unit of an electropneumatic pressure modulator of a vehicle, includes a solenoid-valve unit having a valve-housing bottom with compressed-air bores, and solenoid valves having solenoids and displaceable magnet armatures. The solenoids are disposed outside of the valve-housing bottom. At least one pressure sensor for measuring pneumatic pressure in a compressed-air bore of the valve-housing bottom is placed in or on the valve-housing bottom. Electric leads to the solenoids and to the pressure sensor are routed to a common electrical interface.