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Pyrotechnic gas generator enclosing a perforated tubular casing

A generator, pyrotechnic technology, applied in vehicle components, pedestrian/occupant safety arrangement, vehicle safety arrangement, etc., can solve problems such as difficult to solve

Inactive Publication Date: 2011-08-31
AUTOLIV DEV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The problem is made more difficult by the customary use of pyrotechnic charges in this generator type, i.e. charges consisting of small particles or pastille powders of pyrotechnic material

Method used

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  • Pyrotechnic gas generator enclosing a perforated tubular casing
  • Pyrotechnic gas generator enclosing a perforated tubular casing
  • Pyrotechnic gas generator enclosing a perforated tubular casing

Examples

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Embodiment Construction

[0034] figure 1 The shown pyrotechnic gas generator 1 comprises a cylindrical tubular casing 10 in which the walls of the tube are positioned on disc-shaped rings 11, 12 at each end thereof; Internally extended to ensure plugging of the pipe wall on the annulus.

[0035] Similarly, the tube wall is adjoined by an additional spacer 13 , also in the shape of a disk, which extends parallel to the rings 11 , 12 .

[0036] The spacer is traversed by a through hole 130 forming a nozzle described below. In various embodiments (not shown), the number of vias may be greater than one. The housing 10, as well as the rings 11 and 12 and the spacer 13, are made of a metal with high mechanical and thermal resistance.

[0037] However, housing 10 is made of a metal that is sufficiently malleable to allow for installation.

[0038] A partition 13 divides the interior of the housing 10 into two longitudinal (one relative to the direction of extension of the other) complementary chambers, i...

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Abstract

The present invention relates to a pyrotechnic gas generator for automobile safety, comprising a closed tubular casing (10) containing: at least one combustion chamber (C) containing a pyrotechnic charge (3) constituted by material in bulk, with combustion thereof being triggered by an initiator associated with the chamber (C); at least one plenum chamber (T) associated with said combustion chamber (C) and communicating therewith via at least one nozzle (130) that receives the gas generated by combustion of the charge (3) and serves to exhaust the gas to the outside via at least one dischargeopening (100) formed in said casing (10). It is remarkable in that combustion chamber (C) and plenum chamber (T) are offset longitudinally, said nozzle (130) also extending longitudinally; that the zone (14) of the casing (10) situated in register with said combustion chamber (C) does not have any opening in communication with the outside.

Description

technical field [0001] The invention relates to a pyrotechnic gas generator for automotive safety equipment. [0002] In particular, it is designed to be used generally for inflating what is known as an airbag ("airbag" in English). Background technique [0003] Such a generator generally comprises a closed casing comprising at least one combustion chamber containing a pyrotechnic charge, wherein combustion is triggered by an initiator connected to the chamber. The casing also includes at least one gas-filled chamber connected to the combustion chamber, the gas-filled chamber receives gases generated by the combustion of the charge, and ensures that these gases are discharged to the outside through at least one discharge hole formed on the casing . [0004] Combustion problems may then arise when the pyrotechnic charge consists of pastilles and the L / D ratio of the generator is greater than 1 (L=generator length, D=diameter). [0005] In fact, the situation arises that th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R21/26B60R21/264
CPCB60R21/2644B60R2021/26058
Inventor 伊冯尼·巴顿
Owner AUTOLIV DEV AB
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