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Activated-stroke actuator, in particular for an automobile safety system for the protection of pedestrians

An actuation device and stroke technology, applied in pyrotechnic actuation devices, fluid pressure actuation devices, pedestrian/occupant safety arrangements, etc.

Inactive Publication Date: 2013-08-07
海瑞克里兹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there may be situations where the aforementioned safety system is triggered and thus raises the bonnet in the absence of an accident, for example in the case of a false detection or if the pedestrian does not hit the bonnet

Method used

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  • Activated-stroke actuator, in particular for an automobile safety system for the protection of pedestrians
  • Activated-stroke actuator, in particular for an automobile safety system for the protection of pedestrians
  • Activated-stroke actuator, in particular for an automobile safety system for the protection of pedestrians

Examples

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Embodiment Construction

[0023] figure 1 The shown trigger stroke actuator 11 comprises a generally cylindrical body 13 housing a piston 15 connected to a connecting rod 17 projecting axially at one end of the body. The body also houses components that push the piston in response to a trigger command. In the example described, these components consist of a gas generator 19 with a spark trigger fitted in the body opposite the piston. At the end of the body opposite the axially protruding link 17 the gas generator is folded. Thus, a gas expansion chamber 21 is formed between the gas generator and the opposite end of the piston.

[0024] As mentioned above, the linkage 17 can be connected to a mechanism that raises the bonnet of the vehicle in the event of a frontal collision of the vehicle with a pedestrian.

[0025] Furthermore, the main body 13 houses a return-braking structure 25 with an inertial trigger threshold, which makes it possible to brake or even prevent the return of the connecting rod 1...

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PUM

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Abstract

Pyrotechnic actuator in particular for lifting the hood of an automobile in the event of a collision with a pedestrian. The actuator comprises a return-braking arrangement (25) acting between the rod (17) and the body (13) of the actuator and having an inertial actuating threshold in order to brake the rod in return only if it is subjected to a force under a sufficient acceleration truly representative of a collision.

Description

technical field [0001] The invention relates to a trigger stroke actuation device which is integrated in particular in a safety system for protecting pedestrians in the event of a frontal collision with a motor vehicle. More specifically, the invention relates to the improvement of an actuation device capable of resetting the safety system to its initial position when the situation permits, in particular after a false detection or after triggering while avoiding an obstacle. Background technique [0002] Patent FR2 878 212 describes a safety system for protecting a pedestrian when the pedestrian is hit by a motor vehicle. The system includes a mechanism that enables the hood of the motor vehicle to be raised rapidly in the event of a crash. Specifically, in the event of a collision, the pedestrian's head often hits the hood of the vehicle. This impact of the head against the hood deforms the hood. When deformation exceeds a certain level, the engine cover comes into conta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R21/34F15B15/22F15B15/19B60R21/38F15B15/20F15B15/14F15B15/26
CPCF15B15/22F15B15/1476B60R21/38F15B15/204F15B15/262F15B15/19
Inventor 埃里克·拉斯贝萨让-保罗·纳多埃夫拉尔·博格
Owner 海瑞克里兹