Robert Bosch Gmbh

Robert Bosch

Joachim Soubari

Udo Schaich

Andreas Rau

The invention relates to a shut-off valve () for hydrogen tank systems. comprising The invention also relates to a hydrogen tank system comprising a shut-off valve () according to the invention.

Shut-off valve, and hydrogen tank system comprising a shut-off valve

The invention relates to a solenoid valve (), in particular a shut-off valve for hydrogen tank systems, comprising a reciprocatingly movable magnetic armature () which is or can be coupled to a reciprocatingly movable valve element (), the magnetic armature () being preloaded in the direction of the valve element () by means of a spring (), the solenoid valve further comprising an annular solenoid coil () for acting on the magnetic armature (), the solenoid coil () surrounding the magnetic armature () in portions. According to the invention, the magnetic armature () has a portion () designed as a plunger armature and a portion () designed as a flat armature, the portion () designed as a plunger armature delimiting a pressure chamber () within the solenoid coil (), which pressure chamber is connected pneumatically, preferably via a choke (), to a control chamber () which can be relieved by opening a control valve () which can also be actuated by means of the solenoid coil (). The invention also relates to a hydrogen tank system comprising a solenoid valve () according to the invention.

Solenoid valve and hydrogen tank system comprising solenoid valve

The invention relates to a shut-off valve comprising: a housing which has an inlet opening, an outlet opening and a control opening, wherein the housing defines an inner space extending along a longitudinal axis and has a partition which divides the inner space into an outlet chamber and a control chamber and has a guide hole which extends between the outlet chamber and the control chamber; an electrical coil which is accommodated in the partition and surrounds the guide hole; a servo valve needle which is arranged in the control chamber, is preloaded along the longitudinal axis into a closed position in which it seals the control opening, and can be moved, by means of a magnetic field which can be generated by the coil, into an open position in which it exposes the control opening and abuts the partition, wherein the servo valve needle has a connecting channel which connects the control chamber to the guide hole in the open position of the servo valve needle; and a main valve needle which is movably guided in the guide hole along the longitudinal axis, is preloaded along the longitudinal axis into a closed position in which it seals the outlet opening, and, when the servo valve needle is arranged in its open position, can be moved, by means of the magnetic field which can be generated by the coil, into an open position in which it exposes the outlet opening.

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Ettlingen, Germany

Joachim Soubari