IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0230545
(2008-08-29)
|
등록번호 |
US-7690680
(2010-05-20)
|
우선권정보 |
DE-10 2006 010 953(2006-03-03) |
발명자
/ 주소 |
- Meissner, Dirk
- Fernàndez, Juan
- Vidolov, Kliment
- Markfort, Dieter
- Lube, Thomas
- Hänsel, Michael
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
10 |
초록
▼
An airbag module for a motor vehicle includes a gas sack that can be inflated with gas to protect an occupant, a gas generator for generating the gas provided for inflating the gas sack, and an additional cooling device comprising an openable reservoir for storing a coolant. The reservoir is opened
An airbag module for a motor vehicle includes a gas sack that can be inflated with gas to protect an occupant, a gas generator for generating the gas provided for inflating the gas sack, and an additional cooling device comprising an openable reservoir for storing a coolant. The reservoir is opened when the gas sack is inflated, so that the coolant for cooling the gas used to inflate the gas sack can come into contact with the gas. The cooling device comprises a movement generating device that opens the reservoir to release the coolant.
대표청구항
▼
What is claimed is: 1. An airbag module for a motor vehicle, comprising: a gas sack that can be inflated with gas to protect an occupant; a gas generator for generating the gas provided for inflating the gas sack; and an additional cooling device including: an openable reservoir for storing a coola
What is claimed is: 1. An airbag module for a motor vehicle, comprising: a gas sack that can be inflated with gas to protect an occupant; a gas generator for generating the gas provided for inflating the gas sack; and an additional cooling device including: an openable reservoir for storing a coolant for cooling the gas in the gas sack, the reservoir designed to be opened irrespective of the time of activation of the gas generator, so that the coolant can come into contact with the gas, and a movement generating device that opens the reservoir to release the coolant. 2. The airbag module as claimed in claim 1, wherein the movement generating device opens the reservoir at a predefinable time to release the coolant. 3. The airbag module as claimed in claim 2, wherein the time is calculated by an electronic control unit as a function of at least one parameter that can be sensed by a sensor unit. 4. The airbag module as claimed in claim 2, wherein the movement generating device releases the coolant, to open a closure of an outflow opening of the reservoir, through which the coolant can be released. 5. The airbag module as claimed in claim 4, wherein the outflow opening is arranged in an interior space of the gas sack. 6. The airbag module as claimed in claim 4, wherein the movement generating device opens the closure of the outflow opening, to act on the closure with a pressure. 7. The airbag module as claimed in claim 6, wherein the movement generating device generates the pressure pyrotechnically. 8. The airbag module as claimed in claim 4, wherein the closure is formed in one piece with the reservoir. 9. The airbag module as claimed in claim 4, wherein the closure is adhesively bonded or welded to the outflow opening. 10. The airbag module as claimed in claim 4, wherein the closure is embodied as a film that covers the outflow opening. 11. The airbag module as claimed in claim 4, wherein the coolant situated in the reservoir is pressurized, so that the coolant is released when the closure of the outflow opening is opened. 12. The airbag module as claimed in claim 11, wherein the cooling device acts on the coolant with a gas via a diaphragm to pressurize the coolant. 13. The airbag module as claimed in claim 12, wherein the diaphragm can be moved from a first into a second position by being acted on with a gas to release the coolant. 14. The airbag module as claimed in claim 12, wherein the movement generating device pyrotechnically generates the gas for pressurizing the coolant. 15. The airbag module as claimed in claim 12, wherein the pressure chamber and the reservoir are separated from one another by the diaphragm. 16. The airbag module as claimed in claim 15, wherein the movement generating device generates a gas acting on the diaphragm in the pressure chamber. 17. The airbag module as claimed in claim 11, including a piston for pressurizing the coolant. 18. The airbag module as claimed in claim 17, wherein the cooling device acts on the piston with a gas to pressurize the coolant. 19. The airbag module as claimed in claim 17, wherein the piston can be moved from a first into a second position by being acted on with a gas to release the coolant. 20. The airbag module as claimed in claim 17, wherein the reservoir includes a second end section situated opposite the first end section, and wherein the piston is arranged in the second end section such that it can be moved from a first into a second position to release the coolant. 21. The airbag module as claimed in claim 4, wherein the cooling device provides an overpressure in the reservoir that causes a release of the coolant through the outflow opening of the reservoir when the outflow opening is open. 22. The airbag module as claimed in claim 21, wherein the cooling device provides the overpressure for releasing the coolant at a predefinable time, with the time being calculated by an electronic control unit as a function of at least one parameter that can be sensed by a sensor unit. 23. The airbag module as claimed in claim 21, wherein the overpressure is provided by the movement generating device. 24. The airbag module as claimed in claim 4, wherein the outflow opening of the reservoir divides the coolant into a plurality of droplets when released through the outflow opening. 25. The airbag module as claimed in claim 4, wherein a plurality of outflow openings for releasing the coolant are provided. 26. The airbag module as claimed in claim 25, wherein the outflow openings are formed on a first end section of the reservoir. 27. The airbag module as claimed in claim 25, wherein the outflow openings are distributed uniformly in the peripheral direction on the upper side of the reservoir. 28. The airbag module as claimed in claim 1, wherein the cooling device releases a predeterminable quantity of coolant per unit time. 29. The airbag module as claimed in claim 1, wherein the movement generating device interacts with an electronic control unit that triggers the movement generating device to generate the movement at a predeterminable time as a function of at least one parameter that can be sensed by a sensor unit. 30. The airbag module as claimed in claim 29, wherein the electronic control unit calculates the time as a function of at least one parameter that can be sensed by the sensor unit. 31. The airbag module as claimed in claim 1, wherein the coolant is liquid when the coolant is released. 32. The airbag module as claimed in claim 31, wherein the cooling device divides the coolant into a plurality of droplets when released. 33. The airbag module as claimed in claim 1, wherein the coolant is vaporized by the heat of the gas that is to be cooled. 34. The airbag module as claimed in claim 1 wherein the cooling device releases the coolant along an outflow direction into an interior space of the gas sack. 35. The airbag module as claimed in claim 34, wherein the outflow direction runs along a main folding direction, along which the gas sack moves when inflated, toward an occupant to be protected. 36. The airbag module as claimed in claim 1, wherein the reservoir projects at least in sections into an interior space of the gas sack. 37. The airbag module as claimed in claim 1, wherein the gas generator has a flange for fastening the gas generator to a generator support. 38. The airbag module as claimed in claim 37, wherein the gas sack has an inflow opening through which gas can be conducted into the gas sack to inflate the gas sack; wherein the inflow opening has an edge region that encircles the inflow opening and that, to fix the gas sack to the generator support, is arranged between the flange and the edge region of the gas generator opening; wherein the flange is fixed to the generator support with at least one connecting element; wherein the flange has at least one first cut-out, and in that the generator support has at least one second cut-out that is aligned with the first cut-out; wherein the second cut-out is provided at the edge region of the gas generator opening; and wherein the at least one connecting element is guided through the aligned cut-outs to fix the flange to the generator support. 39. The airbag module as claimed in claim 38, wherein the outflow opening of the cooling device is formed by a passage opening that is formed in the connecting element. 40. The airbag module as claimed in claim 39, wherein the reservoir is connected to the connecting element from the direction of an exterior space surrounding the airbag module, so that the coolant can pass from the reservoir through the passage opening into an interior space of the gas sack. 41. The airbag module as claimed in claim 39, wherein an inflow line is provided that connects the reservoir to the connecting element. 42. The airbag module as claimed in claim 37, wherein the flange has at least one first continuous recess, and in that the generator support has at least one second continuous recess. 43. The airbag module as claimed in claim 42, wherein the reservoir of the cooling device is inserted into the two recesses to fix the reservoir to the generator support, so that the flange and the generator support enclose the reservoir in cross section. 44. The airbag module as claimed in claim 1, wherein the reservoir of the cooling device is spaced apart from the airbag module in an exterior space surrounding the airbag module. 45. The airbag module as claimed in claim 1, wherein the cooling device is integrated into the gas generator. 46. The airbag module as claimed in claim 45, wherein the cooling device is embedded centrally into an upper side of the gas generator, facing towards the interior space, such that the reservoir of the cooling device is surrounded at least in sections by the gas generator. 47. The airbag module as claimed in claim 1, wherein a diffuser for deflecting the gases that are generated by the gas generator for inflating the gas sack. 48. The airbag module as claimed in claim 47, wherein the diffuser has a flange encircling in the peripheral direction for fixing the gas sack to a part of the airbag module. 49. The airbag module as claimed in claim 48, wherein the reservoir is arranged on the flange and extends in the peripheral direction along the flange. 50. The airbag module as claimed in claim 48, wherein the reservoir and/or the pressure chamber is formed in one piece with the flange. 51. The airbag module as claimed in claim 47, wherein the cooling device is integrated into the diffuser. 52. The airbag module as claimed in claim 47, wherein the cooling device forms a separate sub-module that can be fastened to the diffuser. 53. The airbag module as claimed in claim 1, wherein a pressure chamber extends along the reservoir and can be filled with gas to pressurize the coolant. 54. The airbag module as claimed in claim 1, wherein a plurality of additional cooling devices are provided that in each case comprise an openable reservoir for storing a coolant, with the respective reservoir being opened when the gas sack is inflated, so that the coolant for cooling the gas used to inflate the gas sack can come into contact with the gas. 55. The airbag module as claimed in claim 54, wherein the cooling devices are assigned different regions of the gas sack. 56. The airbag module as claimed in claim 54, wherein different coolants and/or coolant quantities are stored in the individual reservoirs. 57. The airbag module as claimed in claim 54, wherein the individual cooling devices can be activated separately by an electronic control unit as a function of at least one parameter that can be sensed by a sensor unit to release coolant. 58. The airbag module as claimed in claim 1, wherein between 0.05 and 0.15 g of coolant per liter gas sack volume is released into the gas sack to cool the gas introduced into the gas sack when the gas sack is inflated.
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