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A pyrotechnic actuator for an active hood

A technology for actuators and filters, which can be used in pyrotechnic actuation devices, pedestrian/passenger safety arrangements, vehicle components, etc., and can solve problems such as cost and maintenance

Active Publication Date: 2009-12-30
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This necessitates an expensive maintenance stop every time the actuator is activated

Method used

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  • A pyrotechnic actuator for an active hood
  • A pyrotechnic actuator for an active hood
  • A pyrotechnic actuator for an active hood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] figure 1 A sectional view of the actuator according to the invention is shown along the longitudinal axis of the cylinder 1 , which is partially shown in the figure. The piston 2 that can move in the cylinder 1 is fixed on the automobile engine cover that is lifted by the actuator that is not shown in the figure by the piston rod 3 that stretches out from the cylinder 1 upper end. The entire actuator is installed in the vehicle body structure in such a way that it is hidden under the bonnet.

[0030] The piston 2 comprises a hollow cylindrical piston skirt 4 which is open downwards and is fixedly connected to the piston rod 3, and a slide 5 of substantially cylindrical construction, the bottom side of which is enlarged by a surrounding flange 6, so that the The bottom side occupies the free cross-section of the cylinder 1, leaving only slight play. In the structure shown in the figure, the end portion 7 of the slider 5 clamps a plurality of clamping beads 8 in a posit...

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PUM

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Abstract

A pyrotechnic actuator for an active hood is disclosed, including: a housing (40) for at least one gas generator (11), a cylinder (1) including a piston (2) moving therein and compressed gas pipes (13, 15, 16, 20, 29, 20) connecting the housing (40) with the cylinder (1). Filter devices (17, 23, 24) are arranged on the compressed gas pipes (13, 15, 16, 20, 29, 20) to capture granules in the gas flow of the gas generator (11).

Description

technical field [0001] The invention relates to a smoke explosion actuator used for an active roof of an automobile. Background technique [0002] Such a smoke burst actuator is known, for example, from DE 10 2006 008 900 A1. The effect of this actuator is that in the shortest possible time when the vehicle is involved in a traffic accident, its front roof is lifted by igniting the propellant (Treibladung) contained in it, so as to enlarge the roof and the engine block components located below it. Or the distance between other non-deformable parts of the vehicle, and thus provide a possible buffer zone for pedestrians who may hit it, so as to reduce the risk of serious injury. [0003] It has been shown in practice that the compressed gas supplied by the propellant contains a large amount of solid particles which get into the cylinder of the actuator when operating the actuator. Therefore, the actuator can only be used a second time after the particles have been completely...

Claims

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Application Information

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IPC IPC(8): F15B15/19F15B21/04B60R21/34B60R21/38
CPCB60R21/38F15B15/19B60R21/34
Inventor 伯恩德·德雷尔乔基姆·谢弗埃里克·威辛格罗尔夫·威克阿克塞尔·蒂勒特
Owner GM GLOBAL TECH OPERATIONS LLC
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