Gas generator assembly suitable for automobile air bag

Abstract

The invention discloses a gas generator assembly suitable for an automobile air bag. The gas generator assembly comprises an exhaust hood, an upper cover and a lower cover, wherein a closed gas generating cavity is formed by the upper cover and the lower cover; the exhaust hood is provided with a diversion cavity body which is covered on the top of the upper cover, and a diversion region is jointly formed by the diversion cavity and the upper cover; a gas inlet is formed in the upper cover; high-pressure gas enters from the gas generating cavity to the diversion region through the gas inlet; and the diversion region formed by the diversion cavity of the exhaust hood and the upper cover comprises a first diversion region and a decompression diversion region. According to the gas generator assembly disclosed by the invention, according to an ideal-gas equation: pV=nRT, finite element figure modeling is performed, after a large number of simulating test for repeatedly amending, so that the gas generator assembly suitable for the automobile air bag is provided; and the gas generator assembly is provided with a diversion region, so that stage decompressional expansion is performed on the generated high-pressure gas, the situation that damaging impact is generated on the gas generator is avoided, and the air bag injury accidents are avoided.

Description

technical field [0001] The invention relates to a gas generator assembly suitable for automobile safety airbags, belonging to the technical field of automobile safety airbags. Background technique [0002] Over the past two decades, the automotive industry has developed airbag systems for protecting vehicle occupants in the event of a collision. Such airbags are usually deployed by means of hot gases delivered by a pyrotechnic gas generator. In the event of a collision, the airbag must deploy rapidly and must remain inflated long enough after the impact, therefore, the pyrotechnic gas generator is designed to operate within a very short period of time on the order of tens of milliseconds. [0003] Currently, most vehicles are equipped with safety systems of the airbag type, and most of these systems are triggered at the moment the vehicle actually comes into contact with an obstacle, ie in the event of an actual collision. When a car collides, it takes about 0.03 seconds f...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies in the prior art, according to the ideal gas state equation: pV=nRT, carry out finite element digital modeling, through a large number of simulation tests, repeated corrections, to provide a kind of airbag suitable for automobiles The gas generator assembly has a diversion area, which can depressurize and expand the generated high-pressure gas in stages. On the one hand, it can avoid destructive impact on the gas generator itself, avoid airbag injury accidents, and on the other hand, make the airbag obtain An appropriate inflation speed to avoid the danger caused by the air bag inflation speed being too fast or too slow

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