Method and system for improving curtain air bag deployment using an actuator attached to a headliner

• US 8,452,494 B2
• Filed: 06/08/2010
• Issued: 05/28/2013
• Est. Priority Date: 06/08/2010
• Status: Active Grant

• Current Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Original Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Inventors: Gandhi, Umesh N.
• Primary Examiner(s): Tarcza, Thomas
• Assistant Examiner(s): Anwari, Maceeh
• Application Number:
  US12/796,381
• Publication Number:
  US 20110301816A1
• Time in Patent Office: 1,085 Days
• Field of Search: 701/45, 280/730.2, 280/735, 280/728.3, 180/274
• US Class Current: 701/45
• CPC Class Codes: B60R 13/0225 self supporting head liners
• CPC Class Codes: B60R 2013/0287 integrating other functions or accessories
• CPC Class Codes: B60R 21/013 including means for detecting collisions, impending collisions or roll-over
• CPC Class Codes: B60R 21/213 in vehicle roof frames or pillars
• CPC Class Codes: B60R 21/215 characterised by the covers for the inflatable member B60R21/2176 takes precedence

Abstract

The present invention is a method and system for improving curtain air bag deployment using an actuator attached to a headliner. The present invention can include an automobile having a roof, a headliner, an actuator, a curtain air bag, a door, a sensor, and/or a processor. The roof can also include a roof rail. The roof rail and the headliner enclose the curtain air bag. The actuator is attached to the headliner. The sensor is located within the door and detects collision data. The processor analyzes the collision data to determine when to deploy the curtain airbag. In deploying the curtain airbag, the processor activates the actuator, which reduces the overlap between the headliner and the roof rail. The curtain airbags deploys by either pushing through the reduced overlap between the headliner and the roof rail or by easily forming through a gap between the headliner and the roof rail.

Claims

1. An air bag deployment system comprising:

a roof rail;

a headliner overlapping the roof rail;

a curtain air bag located adjacent to the headliner and the roof rail;

an actuator that is in direct contact with the headliner; and

a heating device configured to heat the actuator when the heating device is activated, the heat causing the actuator to bend or contract, which moves and bends the headliner to reduce an overlap between the headliner and the roof rail.

2. The system of claim 1 wherein the actuator includes a shape memory alloy strip.

3. The system of claim 2 wherein the actuator includes an outer metallic plate.

4. The system of claim 3 wherein the shape memory alloy strip contracts and bends the outer metallic plate when the heating device heats the actuator.

5. The system of claim 1 wherein the actuator bends the headliner to create a gap between the headliner and the roof rail when the heating device heats the actuator.

6. The system of claim 5 wherein the heating device is activated prior to deployment of the curtain air bag.

7. The system of claim 1 further comprising a processor configured to activate the heating device prior to or during the deployment of the curtain air bag.

8. The system of claim 7 wherein when the heating device heats the actuator, the actuator bends and pushes the headliner away from the roof rail.

9. The system of claim 7 further comprising a sensor located on a side door of an automobile, the sensor detecting collision data.

10. The system of claim 9 wherein the processor activates the heating device based on the collision data.

11. The system of claim 7 wherein when the heating device heats the actuator, the actuator creates a gap between the headliner and the roof rail.

12. An automobile comprising:

a roof rail;

a headliner overlapping the roof rail;

a curtain air bag located adjacent to the headliner and the roof rail;

an actuator in direct contact with the headliner and including a shape memory alloy strip and an outer metallic plate;

a heating device configured to heat the actuator when the heating device is activated, the heat causing the actuator to bend or contract, which moves and bends the headliner to reduce an overlap between the headliner and the roof rail; and

a processor connected to the heating device and configured to activate the heating device prior to or during the deployment of the curtain air bag.

13. The automobile of claim 12 further comprising:

a side door located on a same side as the curtain air bag in the automobile; and

a sensor connected to the processor and located within the side door, the sensor configured to detect collision data for the side door, and wherein the processor activates the heating device based on the collision data.

14. The automobile of claim 12 wherein the shape memory alloy strip contracts and bends the outer metallic plate when the heating device heats the actuator.

15. The system of claim 12 wherein the actuator bends the headliner to create a gap between the headliner and the roof rail when the heating device heats the actuator.

16. The system of claim 15 wherein the curtain air bag is deployed after the actuator creates the gap between the headliner and the roof rail.

17. A method for deploying a curtain airbag comprising:

determining, using a sensor positioned within a side door and coupled with a processor, a collision to the side door;

activating, using the processor, a heating device;

applying heat, using the heating device, to an actuator in direct contact with a headliner to decrease an overlap between a roof rail and the headliner; and

deploying the curtain airbag.

18. The method of claim 17 wherein the curtain airbag is deployed after the heating device is activated.

19. The method of claim 17 wherein the actuator creates a gap between the headliner and the roof rail after the heating device is activated.

20. The method of claim 19 wherein the curtain airbag is deployed after the actuator creates the gap between the headliner and the roof rail.