Cold gas generator
A generator, cold gas technology, applied in vehicle safety arrangement, pedestrian/occupant safety arrangement, thin material handling, etc., can solve the problems of sealing parts not being in place, uncertainty of reproducibility of opening characteristics, and laborious processing.
Inactive Publication Date: 2006-12-27
ISI AIRBAG
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Problems solved by technology
The machining of this small closed space, which is laterally delimited by the sealing elements, places high demands on the tubular support due to the contact with the sealing elements under pressure, which in itself entails unnecessary and complex machining.
In addition, the hydrodynamically complex annular leakage cross-section, which occurs after damage to the sealing element, causes uncertainties in the reproducibility of the opening properties
Another disadvantage is that the filling and testing of the gas pressure vessel can only be carried out after the cold gas generator has been completely assembled, because the sealing parts cannot be placed under the internal pressure of the gas pressure vessel without additional support
Method used
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Embodiment Construction
[0021] Figures 1, 2, 3, 4 show a cold gas generator with an opening mechanism according to the invention, wherein, in Figures 1 and 2, the released gas can be discharged in the axial direction, while in the image 3 and 4, this is achieved radially. The opening mechanism is arranged on the top of the discharge port 1 of the gas pressure vessel, which is used to destroy the diaphragm 2 and mainly consists of an igniter fixed body 3 , an igniter 4 and a nozzle chamber 5 .
[0022] For the igniter 4 , an already known ignition device is involved, the main structure of which is to have a small amount of kinetic charge 10 (ignition charge) in a casing 8 . From the outside of the igniter 4, an electrically connectable ignition needle 9 is introduced into the kinetic powder 10, which ignites the kinetic powder 10 after applying a voltage (see Figure 5 ).
[0023] If an airbag, in particular an airbag, is to be inflated, as already mentioned, the igniter 4 is first ignited by applyi...
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A cold gas generator for inflating a gas bag with the aid of a gas flowing from a gas pressure container (7). The gas pressure container (7) is provided with an outlet (1) which is sealed by a destructible membrane (2) which is domed in the opposite direction in relation to the stored gas. The membrane (2) is destroyed by means of a jet of hot gas which is directed onto the membrane (2) and which is exclusively produced by igniting an ignition pellet (4) which can be activated by applying an electrical pulse. In order to provide a cold gas generator whose structure includes a simple operating mechanism, offering a high degree of security for the passengers and which inflates the gas bag without destroying or damaging it, when the gas pressure container (7) is in a filled state, the surface (6a) of the membrane (2) opposite said container is fully directed in an open manner towards an area (12) which is connected to the gas bag via at least one outlet (11), through which area the jet of hot gas focussing on the membrane (2) from a nozzle chamber can be guided (5).
Description
technical field [0001] The invention relates to a cold gas generator for inflating an airbag (airbag). Background technique [0002] This cold gas generator is used to feed the stored gas into a connected air bag in functional condition, for example an air bag in a car. [0003] A problem that arises during the inflation of the airbag is the high temperature effect, which occurs especially when the gas is generated by pyrotechnic explosion technology, which, in addition to threatening the occupants, can also cause thermal damage to the airbag itself. [0004] Hybrid gas generators are known which have both a pyrotechnic kinetic charge and a cold gas source in the form of a gas storage tank, the hot gas flow of the pyrotechnic kinetic charge burning through the seal of a closed gas container. This kinetic powder is usually passed through an igniter (an ignition device equipped with a housing, which contains a small amount of pyrotechnic ignition powder inside. - ignite) ign...
Claims
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IPC IPC(8): B60R21/264B60R21/26B60R21/268
CPCB60R21/268Y10T137/1647Y10T137/1714B60R2021/26029B60R2021/2685
Inventor 迪特马尔·舍费尔
Owner ISI AIRBAG