Efficient airbag system

• US 6,179,326 B1
• Filed: 05/06/1998
• Issued: 01/30/2001
• Est. Priority Date: 10/30/1995
• Status: Expired due to Term

• Current Assignee: American Vehicular Sciences LLC (Acacia Research Corporation)
• Original Assignee: Automotive Technologies International Incorporated
• Inventors: Breed, David S., Sanders, William Thomas
• Primary Examiner(s): Dickson, Paul N.
• Application Number:
  US09/073,403
• Time in Patent Office: 1,000 Days
• Field of Search: 280/735, 280/736, 280/738, 280/730.2, 280/730.1
• US Class Current: 280/735
• CPC Class Codes: B60R 2021/0004 Frontal collision
• CPC Class Codes: B60R 2021/23107 the bag being integrated in a multi-bag system
• CPC Class Codes: B60R 2021/23153 specially adapted for rear seat passengers
• CPC Class Codes: B60R 2021/23161 specially adapted for protecting at least two passengers, e.g. preventing them from hitting each other
• CPC Class Codes: B60R 2021/23169 specially adapted for knee protection
• CPC Class Codes: B60R 2021/23519 Resin for coating fabric B60R2021/23514
• CPC Class Codes: B60R 2021/23523 Composite coated fabric B60R2021/23514
• CPC Class Codes: B60R 2021/23557 Molding
• CPC Class Codes: B60R 2021/2358 Bonding
• CPC Class Codes: B60R 2021/2359 Welding
• CPC Class Codes: B60R 21/20 Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
• CPC Class Codes: B60R 21/214 in roof panels
• 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 21/235 characterised by their material
• CPC Class Codes: B60R 21/30 with means to draw ambient air into the flow line and mix such air with the inflation fluid

Abstract

An airbag deployment system including at least one module housing, at least one deployable airbag associated with each housing, an inflator associated with each housing for inflating the airbag(s) to deploy into the passenger compartment, an airbag inflation determination unit for determining that deployment of the airbag(s) is/are desired, and respective electronic control units arranged within or proximate each housing and coupled to a respective inflator and the airbag inflation determination unit for initiating the inflator to inflate the airbag(s) in the respective housing upon receiving a signal from the airbag inflation determination unit. The control units include a power supply for enabling initiation of the inflator. Another airbag system includes a first housing for housing a first airbag adapted to deploy between a dashboard of the vehicle and the front-seated occupant, a first inflator arranged in connection with the first housing for inflating the first airbag, a second housing for housing a second airbag adapted to deploy between a side of the vehicle and the front-seated occupant, and a second inflator arranged in connection with the second housing for inflating the second airbag. This system also includes a sensor and diagnostic module for determining that deployment of the first and second airbags is required for the crash of the vehicle and controlling the first and second inflators to inflate the first and second airbags, respectively.

Claims

1. A vehicle having a passenger compartment and an airbag deployment system, the airbag deployment system comprising

a module housing,

at least one airbag associated with said housing and deployable into the passenger compartment,

inflator means associated with said housing for inflating said at least one airbag to deploy into the passenger compartment,

airbag inflation determining means for generating a signal indicative of whether deployment of said at least one airbag is desired, said airbag inflation determining means comprising crash sensor means arranged separate and at a location apart from said housing for determining the severity of a crash of the vehicle, and

electronic control means arranged within said housing and coupled to said inflator means and to said airbag inflation determining means for initiating said inflator means to inflate said at least one airbag in said housing upon receiving the signal from said airbag inflation determining means, said control means including a power supply for enabling initiation of said inflator means.

2. The vehicle of claim 1, wherein said airbag inflation determining means are structured and arranged to generate a coded signal when deployment of said at least one airbag is desired and said control means are structured and arranged to receive said coded signal and initiate said inflator means based thereon.

3. The vehicle of claim 1, further comprising position sensing means coupled to said control means of said housing for detecting the position of an occupant to be protected by the deployment of said at least one airbag from said housing, said control means being structured and arranged to initiate said inflator means to inflate said at least one airbag in said housing in consideration of the detected position of the occupant.

4. The vehicle of claim 3, wherein said position sensing means are arranged at least partially within or adjacent to said housing.

5. The vehicle of claim 1, further comprising

an additional module housing,

at least one additional airbag associated with said additional housing and deployable into the passenger compartment,

additional inflator means associated with said additional housing for inflating said at least one additional airbag associated with said additional housing to deploy into the passenger compartment,

said airbag inflation determining means being arranged to generate a signal when deployment of said at least one additional airbag is desired, said crash sensor means being arranged separate and at a location apart from said additional housing, and

additional electronic control means arranged within said additional housing and coupled to said additional inflator means and to said airbag inflation determining means for initiating said additional inflator means to inflate said at least one additional airbag upon receiving a signal from said airbag inflation determining means, said additional control means including a power supply for enabling initiation of said additional inflator means, and

delay means arranged in association with at least one of said housings for providing a delay in the inflation of said at least one airbag in said at least one housing initiated by said control means associated with said at least one housing upon receiving the signal from said airbag inflation determining means.

6. The vehicle of claim 5, wherein said delay means are arranged to provide variable delays in the inflation of said at least one airbag in said housing and said at least one airbag in said additional housing.

7. The vehicle of claim 1, further comprising

diagnostic means arranged within said housing for determining the status of said control means, and

monitoring means coupled to each of said diagnostic means for receiving the status of said control means associated with said housing and providing a warning if said control means of said housing fails.

8. The vehicle of claim 1, wherein said airbag inflation determining means and said control means associated with said housing are arranged on a single vehicle bus.

9. The vehicle of claim 3, wherein said position sensing means comprise a wave receiver for receiving waves from the passenger compartment, said wave receiver being coupled to said control means.

10. The vehicle of claim 9, wherein said position sensing means further comprise wave transmitter means coupled to said control means for transmitting waves into the passenger compartment, said control means being structured and arranged to send a signal to said wave transmitter means to cause said wave transmitter means to transmit the waves into the passenger compartment.

11. The vehicle of claim 1, wherein said inflator means comprises

a gas generator for producing the pressurized gas to inflate said at least one airbag, and

aspiration means for combining gas from the passenger compartment with the pressurized gas from said gas generator and directing the combined flow of gas into said at least one airbag.

12. The vehicle of claim 1, wherein said housing is an elongate housing extending along a side of the vehicle, said at least one airbag being a single airbag structured and arranged to inflate along the side of the vehicle from a front of the vehicle to a rear of the vehicle such that said airbag is interposed between the side of the vehicle and spaces above front and rear seats of the vehicle.

13. The vehicle of claim 12, further comprising mounting means for mounting said housing to a ceiling of the vehicle in a direction parallel to a longitudinal direction of the vehicle.

14. The vehicle of claim 11, wherein said aspiration means comprise

a nozzle ending at a mixing chamber, the pressurized gas flowing from said gas generator through said nozzle into said mixing chamber, and

means defining an aspiration inlet port, the gas from the passenger compartment flowing through said aspiration inlet port into said mixing chamber.

15. The vehicle of claim 14, wherein said nozzle is arranged relative to said aspiration inlet port such that only the pressurized gas from said gas generator flows through said nozzle and the pressurized gas is mixed with the gas from the passenger compartment only after the pressurized gas exits from said nozzle.

16. A vehicle having a passenger compartment and an airbag deployment system, the airbag deployment system comprising

a plurality of module housings,

an airbag associated with each of said housings and deployable into the passenger compartment,

inflator means associated with each of said housings for inflating said airbag to deploy into the passenger compartment,

airbag inflation determining means for generating a signal indicative of whether deployment of said at least one airbag is desired, said airbag inflation determining means comprising crash sensor means arranged separate and at a location apart from said housings for determining the severity of a crash of the vehicle, and

electronic control means arranged within or proximate each of said housings and coupled to a respective one of said inflator means and to said airbag inflation determining means for initiating said inflator means to inflate said at least one airbag upon receiving the signal from said airbag inflation determining means, said control means including a power supply for enabling initiation of said inflator means.

17. The vehicle of claim 16, wherein said airbag inflation determining means are structured and arranged to generate a coded signal when deployment of at least one of said airbags is desired and said control means are structured and arranged to receive said coded signal and initiate said inflator means based thereon.

18. The vehicle of claim 16, further comprising position sensing means coupled to said control means of at least one of said housings for detecting the position of an occupant to be protected by the deployment of said airbag from said at least one housing, said control means being structured and arranged to initiate said inflator means associated with said at least one housing to inflate said airbag associated with said at least one housing in consideration of the detected position of the occupant.

19. The vehicle of claim 18, wherein said position sensing means are arranged at least partially within or adjacent to said at least one housing.

20. The vehicle of claim 18, wherein said position sensing means comprise a wave receiver for receiving waves from the passenger compartment said wave receiver being coupled to said control means.

21. The vehicle of claim 20, wherein said position sensing means further comprise wave transmitter means coupled to said control means for transmitting waves into the passenger compartment, said control means being structured and arranged to send a signal to said wave transmitter means to cause said wave transmitter means to transmit the waves into the passenger compartment.

22. The vehicle of claim 16, further comprising

delay means arranged in association with at least one of said housings for providing a delay in the inflation of said airbag in said at least one housing initiated by said control means associated with said at least one housing upon receiving the signal from said airbag inflation determining means.

23. The vehicle of claim 22, wherein said delay means are arranged to provide variable delays in the inflation of said airbag in said at least one housing such that said airbag in said at least one housing inflate at different times.

24. The vehicle of claim 16, further comprising

diagnostic means arranged within at least one of said housings for determining the status of said control means, and

monitoring means coupled to said diagnostic means for receiving the status of said control means associated with said at least one housing and providing a warning if said control means of said at least one housing fails.

25. The vehicle of claim 16, wherein said electronic control means are arranged within each of said housings.

26. The vehicle of claim 16, wherein said electronic control means are arranged exterior of and proximate each of said housings.

27. The vehicle of claim 16, wherein said airbag inflation determining means and said control means associated with said housings are arranged on a single vehicle bus.

28. The vehicle of claim 16, wherein said inflator means comprises

a gas generator for producing the pressurized gas to inflate said at least one airbag, and

aspiration means for combining gas from the passenger compartment with the pressurized gas from said gas generator and directing the combined flow of gas into said at least one airbag.

29. The vehicle of claim 28, wherein said aspiration means comprise

a nozzle ending at a mixing chamber, the pressurized gas flowing from said gas generator through said nozzle into said mixing chamber, and

means defining an aspiration inlet port, the gas from the passenger compartment flowing through said aspiration inlet port into said mixing chamber.

30. The vehicle of claim 29, wherein said nozzle is arranged relative to said aspiration inlet port such that only the pressurized gas from said gas generator flows through said nozzle and the pressurized gas is mixed with the gas from the passenger compartment only after the pressurized gas exits from said nozzle.

31. The vehicle of claim 16, wherein at least one of said housings is an elongate housing extending along a side of the vehicle, said airbag in said at least one housing being a single airbag structured and arranged to inflate along the side of the vehicle from a front of the vehicle to a rear of the vehicle such that said single airbag is interposed between the side of the vehicle and spaces above front and rear seats of the vehicle.

32. She vehicle of claim 31, further comprising mounting means for mounting said at least one housing to a ceiling of the vehicle in a direction parallel to a longitudinal direction of the vehicle.

33. The vehicle of claim 16, wherein said housings comprise a first housing for housing a first airbag structured and arranged to deploy between a dashboard of the vehicle and a space above a front seat of the vehicle and a second housing for housing a second airbag structured and arranged to deploy between a side of the vehicle and a space above the front seat.

34. The vehicle of claim 33, wherein said inflator means comprise first inflator means arranged in connection with said first housing for inflating said first airbag and second inflator means arranged in connection with said second housing for inflating said second airbag.

35. The vehicle of claim 34, wherein said first housing is elongate and has a base, further comprising

mounting means for mounting said base in engagement with a first mounting surface of the vehicle,

said first inflator means comprising a member arranged in opposed relationship to said base and defining a passageway between said member and said base for the pressurized gas to flow from said first inflator means toward said first airbag.

36. The vehicle of claim 35, wherein said second housing is elongate and has a base, further comprising

mounting means for mounting said base of said second housing in engagement with a second mounting surface of the vehicle,

said second inflator means comprising a member arranged in opposed relationship to said base of said second housing and defining a passageway between said member and said base for the pressurized gas to flow from said second inflator means toward said second airbag.

37. The vehicle of claim 33, wherein each of said first and second housings has a length in the longitudinal direction which is larger than a width or thickness of said housing in a direction transverse to the longitudinal direction, each of said first and second housings comprising cover means for releasable retaining the respective one of said first and second airbags.

38. The vehicle of claim 33, further comprising toxic gas reducing means arranged in connection with said control means for reducing the concentration of toxic gas in the passenger compartment of the vehicle in conjunction with deployment of said first and second airbags.

39. The vehicle of claim 38, wherein said toxic gas reducing means comprise exhaust means for exhausting the toxic gas from the passenger compartment of the vehicle after the deployment of said first and second airbags.

40. The vehicle of claim 39, wherein said exhaust means comprises door opening means for opening a door of the passenger compartment of the vehicle after the crash.

41. The vehicle of claim 39, wherein said exhaust means comprise a cover arranged below a seat of the vehicle for sealing a passage between the passenger compartment and the ambient atmosphere, said cover having a frangible seal which is arranged to be broken to open said passage.

42. The vehicle of claim 38, wherein said toxic gas reducing means comprises aspiration means for aspirating air from the passenger compartment to reduce pressure within the passenger compartment and for mixing said aspirated air with said toxic gas thereby reducing the concentration of said toxic gas.

43. The vehicle of claim 38, wherein said toxic gas reducing means comprise window glass removal means for removing at least a portion of window glass defining the passenger compartment of the vehicle in conjunction with initiation of said gas generator means.

44. The vehicle of claim 43, wherein said glass removal means comprises pyrotechnic means arranged adjacent to the window glass.

45. A vehicle having a passenger compartment and an airbag deployment system, the airbag deployment system comprising

first and second module housings,

an airbag associated with each of said first and second housings and deployable in a crash involving the vehicle,

a first inflator associated with said first housing for inflating said airbag associated with said first housing,

a second inflator associated with said second housing for inflating said airbag associated with said second housing,

a crash sensor system for generating a signal when deployment of at least one of said airbags is desired,

first electronic control means arranged within or proximate said first housing and coupled to said first inflator and to said crash sensor system for initiating said first inflator to inflate said airbag in said first housing upon receiving the signal from said crash sensor system indicative of a desire to deploy said airbag in said first housing, said first control means including a power supply for enabling initiation of said first inflator, and

second electronic control means arranged within or proximate said second housing and coupled to said second inflator and to said crash sensor system for initiating said second inflator to inflate said airbags in said second housing upon receiving the signal from said crash sensor system indicative of a desire to deploy said airbag in said second housing, said second control means including a power supply for enabling initiation of said second inflator.

46. A method for deploying an airbag, comprising the steps of:

arranging a deployable airbag in association with each of first and second airbag module housings,

arranging a first inflator in association with the first housing for inflating the airbag associated with the first housing,

arranging a second inflator in association with the second housing for inflating the airbag associated with the second housing,

determining by means of a crash sensor system that deployment of at least one of the airbags is desired and generating a signal indicating that deployment of the at least one airbag is desired,

arranging respective electronic control means within or proximate each of the first and second housings and coupling the respective electronic control means to a respective one of the first and second inflators,

by means of the respective control means, initiating at least one of the first and second inflators to inflate the at least one airbag upon receiving the signal indicating that deployment of the at least one airbag is desired, and

providing the control means with a power supply for enabling initiation of the first and second inflators.