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AssigneeWABCO GmbH
InventorsDieter Frank, Juan Rovira-Rifaterra, Armin Sieker, Andreas Teichmann
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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.
A two-stage solenoid valve for an electropneumatic valve control unit, especially a pilot control unit of a pressure modulator, wherein the solenoid valve is provided with at least:
The solenoid valve according to one of the preceding claims, wherein the front armature (11a) has a smaller cross section than the rear armature (10a).
The solenoid valve according to one of the preceding claims, wherein the primary valve (10) and the secondary valve (11) have a common core (15).
The solenoid valve according to one of the preceding claims, wherein the secondary valve (11) is disposed at the front in introduction direction and the primary valve (10) is disposed at the rear in insertion direction.
The solenoid valve according to one of the preceding claims, wherein the primary side (8a) is provided for a compressed air port for supplying compressed air, and the secondary side (8b) is provided for discharging compressed air.
The solenoid valve according to one of the preceding claims, wherein the valve cartridge (8) can be introduced into a blind bore (4) of the surrounding main housing (2).
The solenoid valve according to one of the preceding claims, wherein the valve cartridge (8) is introduced with its secondary side into the blind bore (4) and can be fixed in the blind bore by the initial pressurization.
Dependencies are inferred from the claim text.