CURTAIN AIRBAG

• US 20130168950A1
• Filed: 08/25/2011
• Published: 07/04/2013
• Est. Priority Date: 09/13/2010
• Status: Active Grant

• Current Assignee: Autoliv Development AB (Autoliv Incorporated)
• Original Assignee: Autoliv Development AB (Autoliv Incorporated)
• Inventors: Nakajima, Yutaka, Nakamura, Yuuki
• Granted Patent: US 8,807,595 B2
• Time in Patent Office: Days
• US Class Current: 280/728.2
• CPC Class Codes: B60R 2021/23386 External tether means
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/233 comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other B60R21/232 takes precedence
• CPC Class Codes: B60R 21/2346 Soft diffusers

Abstract

A curtain airbag for mitigating vehicle occupant ejection. The curtain airbag is stored in the upper portion of a side face section in the interior of a vehicle and is inflated and deployed along the side face section. The curtain airbag includes a front chamber partitioned at the frontmost side of an inflation region. The front chamber is inflated and deployed overlapping a divider-bar that separates a side window from a front pillar window.

Claims

1. A curtain airbag that is stored in an upper portion of a side face section in the interior of a vehicle and that is inflated and deployed along the side face section, the curtain airbag comprising:

a front chamber partitioned by a non-inflation region from and provided at a frontmost side of a main chamber located adjacent to a seat of the vehicle, wherein

the front chamber when inflated and deployed overlaps a divider-bar that separates a side window from a front pillar window of the vehicle.

2. The curtain airbag according to claim 1, further comprising:

at least one tab that fixes the front chamber to the vehicle at an upper edge of the front chamber, wherein

the at least one tab includes a first tab that is provided on a straight line that joins, in the shortest way, a front pillar of the vehicle and an impact point center, the impact point center being the center of a frontmost assumed impact area, in a vehicle front-rear direction, from among a plurality of assumed impact areas that are struck by an impactor that simulates an occupant in an occupant ejection mitigation performance evaluation test.

3. The curtain airbag according to claim 2, wherein a second tab is provided vertically above the impact point center and rearwardly, in a vehicle front-rear direction, of the first tab.

4. The curtain airbag according to claim 3, further comprising:

a tension support section that joins a vehicle front side of the front chamber to the front pillar at a location further toward the vehicle front side than the front chamber and that supports the curtain airbag.

5. The curtain airbag according to claim 4, wherein a lower edge section of the front chamber overlaps a door beltline of a front door of the vehicle.

6. The curtain airbag according to claim 5, wherein the front chamber has a gas inflow port at an upper portion of the front chamber that limits a reception amount of gas per unit time from an adjacent chamber, such that inflation and deployment of the front chamber are implemented after the implementation with respect to other chambers.

7. The curtain airbag according to claim 2, further comprising a tension support section that joins a vehicle front side of the front chamber to the front pillar at a location further toward the vehicle front side than the front chamber and that supports the curtain airbag.

8. The curtain airbag according to claim 1, further comprising a tension support section that joins a vehicle front side of the front chamber to the front pillar at a location further toward the vehicle front side than the front chamber and that supports the curtain airbag.

9. The curtain airbag according to claim 3, wherein a lower edge section of the front chamber overlaps a door beltline of a front door of the vehicle.

10. The curtain airbag according to claim 2, wherein a lower edge section of the front chamber overlaps a door beltline of a front door of the vehicle.

11. The curtain airbag according to claim 1, wherein a lower edge section of the front chamber overlaps a door beltline of a front door of the vehicle.

12. The curtain airbag according to claim 4, wherein the front chamber has a gas inflow port at an upper portion of the front chamber that limits a reception amount of gas per unit time from an adjacent chamber, such that inflation and deployment of the front chamber are implemented after the implementation with respect to other chambers.

13. The curtain airbag according to claim 3, wherein the front chamber has a gas inflow port at an upper portion of the front chamber that limits a reception amount of gas per unit time from an adjacent chamber, such that inflation and deployment of the front chamber are implemented after the implementation with respect to other chambers.

14. The curtain airbag according to claim 2, wherein the front chamber has a gas inflow port at an upper portion of the front chamber that limits a reception amount of gas per unit time from an adjacent chamber, such that inflation and deployment of the front chamber are implemented after the implementation with respect to other chambers.

15. The curtain airbag according to claim 1, wherein the front chamber has a gas inflow port at an upper portion of the front chamber that limits a reception amount of gas per unit time from an adjacent chamber, such that inflation and deployment of the front chamber are implemented after the implementation with respect to other chambers.

16. A vehicle having a front pillar, a side window, a front pillar window adjacent to the front pillar and a divider-bar separating the side window from the front pillar window, the improvement comprising a curtain airbag that is stored in an upper portion of a side face section in the interior of a vehicle and that is inflated and deployed along the side face section, the curtain airbag having a main chamber and front chamber partitioned from the main chamber and provided at a frontmost side of the curtain airbag, wherein, when deployed and inflated, the front chamber overlaps the divider-bar that separates the side window from the front pillar window of the vehicle.

17. The improvement of claim 16, wherein at least one tab fixes the front chamber to the vehicle at an upper edge of the front chamber, the at least one tab includes a first tab that is provided on a straight line that joins, in the shortest way, the front pillar of the vehicle and an impact point center, the impact point center being the center of a frontmost assumed impact area, in a vehicle front-rear direction, from among a plurality of assumed impact areas that are struck by an impactor that simulates an occupant in an occupant ejection mitigation performance evaluation test.

18. The improvement of claim 17, wherein a second tab is provided vertically above the impact point center and rearwardly, in a vehicle front-rear direction, of the first tab.

19. The improvement of claim 16, further comprising a tension support section that joins a vehicle front side of the front chamber to the front pillar at a location further toward the vehicle front side than the front chamber and that supports the curtain airbag.

20. The improvement of claim 16, wherein the front chamber has a single gas inflow port at an upper portion of the front chamber that limits a reception amount of gas per unit time from an adjacent chamber, such that inflation and deployment of the front chamber are implemented after the implementation with respect to the main chamber.