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Gas generator

A gas generator, gas technology, applied in the direction of vehicle safety arrangement, pedestrian/occupant safety arrangement, transportation and packaging, etc., can solve the problem of no relationship description

Active Publication Date: 2013-06-05
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The cross-sectional area of ​​the gas discharge cylinder is described in detail in paragraph [0017], but its relationship to the total opening area of ​​the plurality of gas discharge holes is not described at all

Method used

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Embodiment approach

[0053] (1) Hybrid inflator

[0054] The following will refer to Figures 1 to 3 An embodiment in which the gas generator according to the present invention is used as a hybrid inflator will be described.

[0055] figure 1 The state before refitting the diffuser part 100 to the structure which is basically the same as that of JP-A No. 2008-137475 is exemplified. figure 1 The same structure is obtained for the diffuser section 50 in the generator 10 shown in FIG.

[0056] The inflator 10 has a pressurized gas chamber 20 , a gas generator 30 and a diffuser portion 50 .

[0057] In the pressurized gas chamber 20, an enclosure is formed by a cylindrical pressurized gas chamber case (case main body) 22, and is filled with a pressurized gas including a mixture of argon and / or helium. Because the pressurized gas chamber housing 22 is symmetrical with respect to the axial and radial directions, it is not necessary to adjust the orientation axially and radially during the assembly p...

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PUM

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Abstract

A gas generator includes a diffuser portion (100) connected to a main housing (22) and discharging a gas, the inside of the diffuser portion having a first tubular space portion (110) and a second tubular space portion (111), the first tubular space portion (110) facing a partition plate (120), and the second tubular space portion (111) communicating with gas discharge ports (105), the first tubular space portion and the second tubular space portion being provided with a step such that the inner diameter d1 of the first tubular space portion and the inner diameter d2 of the second tubular space portion satisfy the relationship d1 > d2, and a cross - sectional area of the second tubular space portion being less than the total opening area of the gas discharge ports (105).

Description

field of invention [0001] The invention relates to a gas generator suitable for a restraint system of a vehicle. Background technique [0002] A gas generator for an airbag device supplies a predetermined amount of gas to the airbag during operation. The amount of gas supplied is determined by the purpose of the airbag and its specification. Therefore, it is expected that the gas generator shows a stable output. [0003] The amount of gas discharged from the gas generator per unit time is adjusted by a choke in the gas discharge path. The gas blocking portion is a portion (minimum area portion) having the smallest cross-sectional area or opening area in the exhaust path leading to the gas discharge port. Therefore, it is necessary to ensure that the smallest area portion is always stable. [0004] US-A No. 5941563 discloses a partial view of a gas generator with a diffuser 12 fitted to the end of a casing 14 . The diffuser 12 has a ceiling portion 24 , side walls 22 and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R21/272B60R21/264
CPCB60R21/272B60R21/261B60R21/26B60R21/264B60R21/274
Inventor 中安雅之
Owner DAICEL CHEM IND LTD