Trw Airbag Systems Gmbh

Zf Airbag Germany Gmbh

Elmar Bendel

Detlef Last

Christian Jung

Anja Esau

Ning Wei

The present disclosure relates to a gas generator comprising a housing, an igniter and a pyrotechnic charge via which gas for filling a gasbag can be provided, wherein the gas generator is free from stored pressurized gas in the idle state, characterized in that each possible diffusion path out of the internal chamber of the housing is sealed relative to the environment of the gas generator by means of a weld seam. The present disclosure also relates to a method for leak testing a pyrotechnic gas generator of this type, wherein, before the gas generator is welded against diffusion, a test amount of helium is introduced into the housing and, in a subsequent leak testing step, a measurement is carried out to determine whether helium is passing out of the housing.

Pyrotechnic gas generator

The invention relates to a gas generator (), particularly a pyrotechnical tube gas generator, with an axial longitudinal direction (L), comprising an ignition unit (), a combustion chamber () axially mounted downstream from the ignition unit () and comprising a combustion chamber bottom () forming a combustion chamber outlet (), and a filter chamber () that is axially mounted downstream of the combustion chamber (). According to the invention, at least one guiding sleeve () and a front-side baffle plate () are formed in the filter chamber, a first end () of the guiding sleeve (), on the side of the combustion chamber, being axially mounted downstream from the combustion chamber bottom (), and a second end () of the guiding sleeve () being associated with the baffle plate (), a first deflection section being formed on the baffle plate () and the guiding sleeve () which allows a gas flow to an outer side of the guiding sleeve () into an annular first discharge chamber ().

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Traunstein, Germany

Elmar Bendel