COST-EFFECTIVE USE OF ONE-PIECE WOVEN FABRIC FOR CURTAIN AIRBAGS

• US 20150343981A1
• Filed: 08/06/2015
• Published: 12/03/2015
• Est. Priority Date: 01/08/2014
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Wang, Xiaohong, Walston, Bryan, Yakumo, Arthur, Paranjpe, Avadhoot, Hicken, Paul
• Granted Patent: US 9,650,010 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60R 2021/161 characterised by additional means for controlling deployment trajectory
• CPC Class Codes: B60R 2021/23386 External tether means
• CPC Class Codes: B60R 21/201 Packaging straps or envelopes for inflatable members
• CPC Class Codes: B60R 21/213 in vehicle roof frames or pillars
• CPC Class Codes: B60R 21/216 comprising tether means for limitation of cover motion during deployment
• CPC Class Codes: B60R 21/23138 specially adapted for side protection B60R21/23184, B60R21/232 take precedence
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/2338 Tethers

Abstract

An airbag assembly may include an inflatable curtain airbag with a stowed configuration and a deployed configuration. The inflatable curtain may have a first chamber and a second chamber that inflates forward of the first chamber. The second chamber may have a height above the height of the first chamber so that a bottom of the second chamber is pressed downward adjacent to a door of the vehicle. A plurality of airbag assembly components may be integrally formed with a non-inflating peripheral region surrounding the first and second chambers. Such components may include a front or rear tether cut from the front or rear of the non-inflating peripheral region, a top tether cut from the top of the non-inflating peripheral region to control deployment of the second chamber, and a fabric shield cut from the top to at least partially wrap around the stowed inflatable curtain airbag.

Claims

1. An airbag assembly for disposition proximate a roof of a vehicle to shield a vehicle occupant from impacting at least one lateral surface of the vehicle, the airbag assembly comprising:

an inflatable curtain airbag having a stowed configuration proximate the roof of the vehicle and a deployed configuration into which the inflatable curtain airbag deploys downward between the vehicle occupant and the at least one lateral surface of the vehicle, the inflatable curtain airbag comprising a peripheral juncture that defines;

a first chamber and a second chamber interior to the peripheral juncture; and

a non-inflating peripheral region exterior to the peripheral juncture, the non-inflating peripheral region comprises a top portion positioned above the first and second chambers in the deployed configuration;

a fabric shield comprising a first fabric layer formed as a single piece with the top portion;

wherein, in the stowed configuration, the first fabric layer is wrapped at least partially around a length of the inflatable curtain airbag; and

a tether comprising a first end formed as a single piece with the non-inflating peripheral region and a second end securable to the vehicle, wherein the tether comprises a first segment obtained from a first portion of the non-inflating peripheral region and a second segment obtained from a second portion of the non-inflating peripheral region displaced from the first portion, wherein the second segment is positioned to at least partially overlie the first segment;

wherein, to move the inflatable curtain airbag from the stowed configuration to the deployed configuration, the first chamber inflates and the second chamber inflates forward of the first chamber;

wherein the top portion comprises a rearward section defining an upper boundary of the first chamber, and a forward section defining an upper boundary of the second chamber;

wherein, in the deployed configuration, the forward section is vertically offset from the rearward section such that the forward section is higher than a portion of the rearward section adjacent to the forward section.

2. The airbag assembly of claim 1, wherein the fabric shield is wrapped entirely around the length of the inflatable curtain airbag.

3. The airbag assembly of claim 1, wherein the fabric shield further comprises a second fabric layer formed as a single piece with the non-inflating peripheral region, wherein the second fabric layer is wrapped at least partially around the length of the inflatable curtain airbag.

4. The airbag assembly of claim 3, wherein the second fabric layer is wrapped in a second direction opposite to a first direction in which the first fabric layer is wrapped, wherein, in the stowed configuration, one of the first and second fabric layers at least partially covers the other of the first and second fabric layers.

5. The airbag assembly of claim 1, further comprising a plurality of mounting assemblies, wherein each of the mounting assemblies comprises a tab securable to the vehicle, and a wrapper that wraps around the fabric shield and the inflatable airbag curtain to keep the inflatable airbag curtain in the stowed configuration until deployment.

6. The airbag assembly of claim 1, further comprising an inflator, wherein the peripheral juncture further defines an inflation conduit that separates a top portion of the non-inflating peripheral region positioned above the first chamber in the deployed configuration into forward and rearward sections, wherein the inflation conduit is positioned to convey gas from the inflator into the first chamber, wherein the fabric shield is removed from the rearward section of the top portion of the non-inflating peripheral region.

7. The airbag assembly of claim 1, further comprising an inflator, wherein the peripheral juncture further defines an inflation conduit that separates the top portion of the non-inflating peripheral region into a forward section and a rearward section, wherein the inflation conduit is positioned to convey gas from the inflator into the first chamber, wherein the tether is removed from the forward section of the top portion of the non-inflating peripheral region.

8. An airbag assembly for disposition proximate a roof of a vehicle to shield a vehicle occupant from impacting at least one lateral surface of the vehicle, the airbag assembly comprising:

an inflatable curtain airbag having a stowed configuration proximate the roof of the vehicle and a deployed configuration into which the inflatable curtain airbag deploys downward between the vehicle occupant and the at least one lateral surface of the vehicle, the inflatable curtain airbag comprising an a peripheral juncture that defines, interior to the peripheral juncture, a first chamber, and, exterior to the peripheral juncture, a non-inflating peripheral region; and

a fabric shield comprising a first fabric layer formed as a single piece with the non-inflating peripheral region;

wherein, in the stowed configuration, the first fabric layer is wrapped at least partially around a length of the inflatable curtain airbag;

wherein the first chamber inflates to move the inflatable airbag curtain from the stowed configuration to the deployed configuration.

9. The airbag assembly of claim 8, wherein the fabric shield is wrapped entirely around the length of the inflatable curtain airbag.

10. The airbag assembly of claim 8, wherein the fabric shield further comprises a second fabric layer formed as a single piece with the non-inflating peripheral region, wherein the second fabric layer is wrapped at least partially around the length of the inflatable curtain airbag.

11. The airbag assembly of claim 10, wherein the second fabric layer is wrapped in a second direction opposite to a first direction in which the first fabric layer is wrapped, wherein, in the stowed configuration, one of the first and second fabric layers at least partially covers the other of the first and second fabric layers.

12. The airbag assembly of claim 8, further comprising a plurality of mounting assemblies, wherein each of the mounting assemblies comprises a tab securable to the vehicle, and a wrapper that wraps around the fabric shield and the inflatable airbag curtain to keep the inflatable airbag curtain in the stowed configuration until deployment.

13. The airbag assembly of claim 8, further comprising an inflator, wherein the peripheral juncture further defines an inflation conduit that separates a top portion of the non-inflating peripheral region positioned above the first chamber in the deployed configuration into forward and rearward sections, wherein the inflation conduit is positioned to convey gas from the inflator into the first chamber, wherein the fabric shield is removed from the rearward section of the top portion of the non-inflating peripheral region.

14. The airbag assembly of claim 8, further comprising an inflator, wherein the peripheral juncture further defines an inflation conduit that separates the top portion of the non-inflating peripheral region into a forward section and a rearward section, wherein the inflation conduit is positioned to convey gas from the inflator into the first chamber, wherein the tether is removed from the forward section of the top portion of the non-inflating peripheral region.