Generator, airbag module, vehicle safety system and method for purifying pyrotechnically produced gas
A gas generator and pyrotechnic technology, which is applied in vehicle safety arrangements, chemical instruments and methods, separation methods, etc., can solve problems such as adverse effects of gas values, low solid matter separation rate, and adverse effects of combustion reactions.
Active Publication Date: 2020-02-18
ZF AIRBAG GERMANY GMBH
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Problems solved by technology
However, due to the high flow velocity of the hot gas inside the gas generator, the separation rate of solid matter is extremely low
In addition, especially due to the high quality of the aforementioned components (wire cloth, wire mesh, etc.), the gas temperature drops rapidly, which can adversely affect the combustion reactions in the combustion chamber or in the gas chamber
This can have an adverse effect on gas values that should not exceed a certain concentration of hot gas
Method used
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Embodiment Construction
[0086] figure 1 The gas generator 10 is shown in the form of an elongated tubular gas generator. The housing 11 has an overall length which is more than 4 times, in particular more than 8 times, the outer diameter. Specifically, the outer diameter of the casing (11) may be 20mm, and the total length of the casing (11) may be 80mm to 160mm. An ignition unit 20 with an igniter 21 is formed at the illustrated left-hand end of the gas generator 10 . The firing unit 20 can be a prefabricated, self-closing unit. The gas generator 10 has a central longitudinal axis A and an axial longitudinal direction L parallel to the central longitudinal axis. In this case, axial direction L is to be understood as the direction starting from the ignition unit in the direction of the filter chamber and is marked by a corresponding arrow symbol, in a position coincident with the central longitudinal axis A here.
[0087] The combustion chamber 30 is formed axially behind the ignition unit 20 . ...
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Abstract
The invention relates to a gas generator (10), particularly a pyrotechnical raw gas generator, with an axial longitudinal direction (L), comprising an ignition unit (20), a combustion chamber (30) axially mounted downstream from the ignition unit (20) and comprising a combustion chamber bottom (35) forming a combustion chamber outlet (36), and a filter chamber (70) that is axially mounted downstream of the combustion chamber (30). According to the invention, at least one guiding sleeve (50) and a front-side baffle plate (80) are formed in the filter chamber, a first end (51) of the guiding sleeve (50), on the side of the combustion chamber, being axially mounted downstream from the combustion chamber bottom (35), and a second end (53) of the guiding sleeve (50) being associated with the baffle plate (80), a first deflection section being formed on the baffle plate (80) and the guiding sleeve (50), which allows a gas flow to an outer side of the guiding sleeve (50) into an annular firstdischarge chamber (75).
Description
technical field [0001] The present invention relates to a gas generator with an axial longitudinal direction according to claim 1, especially a pyrotechnic tubular gas generator, which comprises: an ignition unit; a combustion chamber axially located behind the ignition unit, The combustor has a combustor bottom constituting a combustor outlet; and a filter chamber located axially behind the combustor. Furthermore, the invention relates to an airbag module and a vehicle safety system. Furthermore, the invention relates to a method for cleaning pyrotechnically generated gases. Background technique [0002] In gas generators for vehicle safety systems, pyrotechnic deposits react or burn to generate hot gases, which are usually passed through wire mesh or wire cloth or strip coils or layers of expanded metal in the gas generator get chilled. In addition, residues or solid matter produced during combustion are filtered or separated from the hot gas by means of the component. ...
Claims
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IPC IPC(8): B60R21/262B60R21/264
CPCB60R21/262B60R21/2644B60R21/2646B60R2021/2648B60R2021/26011B01D45/06B60R2021/26064B60R2021/26076
Inventor 埃尔玛·本德尔安佳·埃绍德特勒夫·拉斯特克里斯蒂安·琼格魏宁
Owner ZF AIRBAG GERMANY GMBH