Importance

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Abstract

The invention relates to a blocking device comprising a first connection for connecting to a high-pressure tank; a second connection for connecting to a supply line; a main valve chamber which comprises a first opening connected to the first connection in a fluidically conducting manner, a second opening connected to the second connection in a fluidically conducting manner, and a first control opening; a main valve, said main valve being designed as a switchable solenoid valve and comprising a main valve needle that is arranged in the main valve chamber and can be moved between a closed position, in which the main valve needle rests against a main valve seat surrounding the second opening, and an open position, in which the main valve needle is lifted from the main valve seat, wherein the main valve needle divides the main valve chamber into an outlet chamber, into which the first and second opening lead, and a control chamber, into which the first control opening leads and which is connected to the outlet chamber in a fluidically conducting manner; a servo valve chamber which is spatially separate from the main valve chamber and which comprises a second control opening connected to the first control opening in a fluidically conducting manner and a servo opening connected to the second connection in a fluidically conducting manner; and a servo valve, said servo valve being designed as a switchable solenoid valve and comprising a servo valve needle that is arranged in the servo valve chamber and can be moved between a closed position, in which the servo valve needle rests against a servo valve seat surrounding the servo opening, and an open position, in which the servo valve needle is lifted from the servo valve seat.

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First Claim