JPH0365453A - Device for gas generator - Google Patents
Device for gas generatorInfo
- Publication number
- JPH0365453A JPH0365453A JP2163013A JP16301390A JPH0365453A JP H0365453 A JPH0365453 A JP H0365453A JP 2163013 A JP2163013 A JP 2163013A JP 16301390 A JP16301390 A JP 16301390A JP H0365453 A JPH0365453 A JP H0365453A
- Authority
- JP
- Japan
- Prior art keywords
- opening
- gas
- cover
- filter
- gas flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005192 partition Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
- B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J7/00—Apparatus for generating gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R2021/26094—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow characterised by fluid flow controlling valves
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Air Bags (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、フィルタ室が開口を介してガス発生剤室に接
続され、かつガス流のためのフィルタを備えている、自
動車乗客用保護装置のガス発生器のための装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a motor vehicle passenger protection device, in which the filter chamber is connected to the gas generant chamber through an opening and is provided with a filter for the gas flow. Relating to a device for a gas generator.
エアバッグ用ガス発生器は自動車技術において多くの実
施形が知られている。米国特許第４５６１６７５号明細
書はガス発生器ケーシングを示している。このケーシン
グの場合には、ガス発生剤室が開口を介して、ガス発生
剤室を取り囲むフィルタ室に接続されている。ガス発生
剤の点火の場合、ガス流はフィルタ室内に設けられたフ
ィルタを通って強制的に案内される。周囲温度に依存す
る、ガス発生剤の燃焼減少特性の補償は行われない。Gas generators for airbags are known in many embodiments in automotive technology. US Pat. No. 4,561,675 shows a gas generator casing. In this case, the gas generating agent chamber is connected via an opening to a filter chamber surrounding the gas generating agent chamber. In the case of ignition of the gas generant, the gas flow is forced through a filter arranged in a filter chamber. No compensation is made for the combustion reduction properties of the gas generant, which are dependent on ambient temperature.
ヨーロッパ特許第００６９４４１号明細書によってガス
発生器が知られている。このガス発生器の場合には、ガ
ス発生剤室のガス出口が破れるフィルムによって閉鎖さ
れている。このフィルムは最低圧力に達したときに初め
て、フィルタからエアバッグに至るガス流の通路を開放
する。これによって、低い周囲温度の場合には、エアバ
ッグの膨らましが非常に遅れることになる。A gas generator is known from EP 0 069 441. In this gas generator, the gas outlet of the gas generating agent chamber is closed by a tearable film. This film opens the path for gas flow from the filter to the airbag only when a minimum pressure is reached. This results in a significant delay in airbag inflation at low ambient temperatures.
本発明の根底をなす課題は、ガス発生の温度依存性が、
エアバッグの適時の確実な膨らましに対して、非常に弱
い作用を与えるように、フィルタ室を備えたガス発生器
を形成することである。The problem underlying the present invention is that the temperature dependence of gas generation is
The goal is to design the gas generator with the filter chamber in such a way that it has a very weak effect on the timely and reliable inflation of the airbag.
この課題は本発明により、フィルタ室内に隔壁が設けら
れこの隔壁が少なくとも一つの第１の開口と少なくとも
一つの第２の開口を備え、この第２の開口がフィルタに
よって覆われ、かつガス流の主流路を形成し、ガス流が
第１の開口を通って、主流路よりも抵抗がはるかに小さ
いバイパスに沿って案内され、この第の開口が可動のカ
バーを備え、このカバーが周囲温度の設定可能な閾値の
上方で第１の開口を閉鎖するように、カバーの材料特性
と幾何学的特性が選定されていることによって解決され
る。好ましい実施形は特許請求の範囲の請求項２，３に
記載しである。This object is solved according to the invention by providing a partition in the filter chamber, which partition has at least one first opening and at least one second opening, which second opening is covered by the filter and which allows the gas flow to be controlled. forming a main flow path, the gas flow is guided through a first opening along a bypass having a much lower resistance than the main flow path, the first opening having a movable cover, the cover being at ambient temperature. The solution is that the material and geometrical properties of the cover are selected in such a way that the first opening is closed above a predeterminable threshold. Preferred embodiments are described in claims 2 and 3 of the claims.
本発明の特別な効果は、低い周囲温度のときに、高い運
転信頼性が得られ、ガス発生剤の量を減らすことができ
ることにある。それによって、高い周囲温度の場合には
、低いピーク圧力が達成され、従ってケーシングとエア
バッグの小さな圧力負荷に基づいて、運転の信頼性が高
まる。A particular advantage of the invention is that at low ambient temperatures, high operational reliability is achieved and the amount of gas generant can be reduced. As a result, low peak pressures are achieved at high ambient temperatures, and operational reliability is therefore increased due to the low pressure loading of the housing and the airbag.
同時に、ガス発生剤の量が減ったことにより、ガス発生
器の自重が小さくなり、燃焼時に発生する有害物質量も
減る。At the same time, because the amount of gas generating agent is reduced, the weight of the gas generator is reduced, and the amount of harmful substances generated during combustion is also reduced.
本発明の実施例が図に示しである。以下、この実施例を
詳しく説明する。An embodiment of the invention is shown in the figure. This example will be explained in detail below.
図はエアバッグ用ガス発生器の概略断面を示す。The figure shows a schematic cross section of a gas generator for an airbag.
ガス発生剤ケーシング３はガスを発生させるためのガス
発生剤（燃料、推進薬）４を含んでいる。The gas generating agent casing 3 contains a gas generating agent (fuel, propellant) 4 for generating gas.
このガス発生剤ケーシング３には、フィルタ室Ｆのケー
シング２が連結されている。ガス発生側室Ｔからフィル
タ室Ｆへのガスの流れのために、篩（濾し器）１３で覆
われた開口５が設けられている。フィルタ室Ｆは隔壁６
を備えている。この隔壁はフィルタ室を、互いに仕切ら
れた二つの室１４．１５に分割している。この一方の室
１４は開口５を介してガス発生側室Ｔに接続され、他方
の室１５はフィルタセット１６で覆われた吹き出し開口
１２に付設されている。A casing 2 of a filter chamber F is connected to this gas generating agent casing 3. For the flow of gas from the gas generation side chamber T to the filter chamber F, an opening 5 covered with a sieve 13 is provided. Filter chamber F has partition wall 6
It is equipped with This partition divides the filter chamber into two mutually partitioned chambers 14,15. One of the chambers 14 is connected to the gas generation side chamber T through the opening 5, and the other chamber 15 is attached to the outlet opening 12 covered with a filter set 16.
隔壁６は少なくとも１個の第１の開口７と、少なくとも
１個の第２の開口８を備えている。第２の開口８は他の
フィルタセット９によって完全に覆われ、技術水準にお
いて周知のようにガス流の主流路１０としての働きをす
る。The partition wall 6 includes at least one first opening 7 and at least one second opening 8 . The second opening 8 is completely covered by another filter set 9 and serves as the main channel 10 for the gas flow, as is known in the art.
第１の開口７を通過するガスは、他のフィルタセット９
を迂回しながら、吹き出し開口１２に至る非常に抵抗の
少ないバイパス１１を流れる。Gas passing through the first opening 7 is transferred to another filter set 9
The air flows through a bypass 11 with very low resistance to the blowout opening 12 while bypassing the air.
隔壁６のガス発生剤室側において、第１の開口７は可動
のカバー１によって覆われている。このカハーハ本実施
例では薄いアルミニウム板によって形成されている。カ
バーを定寸する場合、カバーが例えば室温（約２０°Ｃ
）のときに、周囲温度に依存するガス圧の所定の閾値の
上方で、ガス発生剤から生じるガス圧によって第１の開
口７の方へ押圧され、この第１開口を閉鎖するよう移動
可能であることが重要である。前記の閾値より低い温度
の場合には、低い温度と共に低くなるガス圧と、カバー
の減退した可動性が、第１の開口を閉鎖するのにもはや
充分でない。On the gas generating agent chamber side of the partition wall 6, the first opening 7 is covered by a movable cover 1. In this embodiment, the capacitor is formed of a thin aluminum plate. When sizing the cover, for example, if the cover is at room temperature (approximately 20°C
), above a predetermined threshold of gas pressure depending on the ambient temperature, the gas pressure arising from the gas generating agent pushes towards the first opening 7 and is movable to close this first opening. It is important that there be. At temperatures below the aforementioned threshold, the gas pressure, which decreases with lower temperatures, and the reduced mobility of the cover are no longer sufficient to close the first opening.
このように第１の開口７の弁機能を温度に依存するよう
にしたことにより、次のことが達成される。ガス発生器
の運転範囲の温度が低い場合、すなわち−４０°Ｃ〜約
＋２０°Ｃの範囲の場合、ガス圧は低い。その結果、こ
のガス圧がフィルタ９を通過するときに濾過および冷却
工程によって更に低くなり、ガス発生器の作動が疑わし
くなることが回避される。従って、ガス流はバイパス１
１に沿って、低い温度で開放している第１の開口７を経
て室１５に案内され、そして他のフィルタセット１６を
通って吹き出し開口１２に導かれる。周囲温度が高い場
合、すなわち＋２０℃と＋８５°Ｃの間の範囲の場合に
は、第１の開口は本発明によるカバー１によって閉鎖さ
れ、ガス流はそれ自体公知の主流路１０に沿って、両フ
ィルタセット９゜１６を通って吹き出し開口１２に流れ
る。従って、カバー１とその材料特性および寸法（より
、所定の温度閾値のときのガス流路の確実な切り換えが
達成される。By making the valve function of the first opening 7 dependent on temperature in this way, the following is achieved. If the temperature in the operating range of the gas generator is low, i.e. in the range from −40° C. to about +20° C., the gas pressure is low. As a result, it is avoided that this gas pressure becomes even lower due to the filtration and cooling process when passing through the filter 9 and that the operation of the gas generator becomes questionable. Therefore, the gas flow is bypass 1
1 into the chamber 15 through the first opening 7 which is open at a low temperature and through another filter set 16 into the outlet opening 12 . If the ambient temperature is high, i.e. in the range between +20° C. and +85° C., the first opening is closed by the cover 1 according to the invention and the gas flow is carried out along a main channel 10 known per se. It flows through both filter sets 9° 16 to the outlet opening 12. Therefore, due to the cover 1 and its material properties and dimensions, a reliable switching of the gas flow path at a predetermined temperature threshold is achieved.
図は本発明の実施例によるエアバッグ用ガス発生器の概
略断面を示す。
１・・・カバー ５・・・開口、 ６隔壁、 ７・
・・第１の開口、 ８・・・第２の開口、 ９・・・フ
ィルタ、 １０・・・主流路、１１・・・バイパス、
Ｔ・・・ガス発生剤室
・フィルタ室、The figure shows a schematic cross section of a gas generator for an airbag according to an embodiment of the present invention. 1... Cover 5... Opening, 6 Partition wall, 7.
...First opening, 8...Second opening, 9...Filter, 10...Main flow path, 11...Bypass, T...Gas generating agent chamber/filter chamber,
Claims (1)
、かつガス流のためのフィルタを備えている、自動車乗
客用保護装置のガス発生器のための装置において、 ａ）フィルタ室（Ｆ）内に隔壁（６）が設けられこの隔
壁が少なくとも一つの第１の開口（７）と少なくとも一
つの第２の開口（８）を備え、この第２の開口がフィル
タ（９）によって覆われ、かつガス流の主流路（１０）
を形成し、ｂ）ガス流が第１の開口（７）を通って、主
流路よりも抵抗がはるかに小さいバイパス（１１）に沿
って案内され、この第の開口が可動のカバー（１）を備
え、このカバーが周囲温度の設定可能な閾値の上方で第
１の開口を閉鎖するように、カバーの材料特性と幾何学
的特性が選定されている ことを特徴とするガス発生器用装置。 ２、カバー（１）の移動がガス流の圧力およびまたは温
度に依存して制御可能であることを特徴とする、請求項
１記載のガス発生器用装置。 ３、カバー（１）が適当な壁厚のアルミニウム板からな
っていることを特徴とする、請求項１または請求項２記
載のガス発生器用装置。Claims: 1. A device for a gas generator of a motor vehicle passenger protection device, in which the filter chamber is connected to the gas generant chamber via an opening and is provided with a filter for the gas flow, comprising: a) A partition (6) is provided in the filter chamber (F), which partition comprises at least one first opening (7) and at least one second opening (8), the second opening being provided with a filter (9) and the main gas flow channel (10)
b) the gas flow is guided through a first opening (7) along a bypass (11) with much lower resistance than the main flow path, this first opening forming a movable cover (1); device for a gas generator, characterized in that the material and geometrical properties of the cover are selected such that the cover closes the first opening above a settable threshold of ambient temperature. 2. Device for a gas generator according to claim 1, characterized in that the movement of the cover (1) is controllable depending on the pressure and/or temperature of the gas flow. 3. Device for a gas generator according to claim 1 or claim 2, characterized in that the cover (1) consists of an aluminum plate with a suitable wall thickness.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3921472.9 | 1989-06-30 | ||
| DE19893921472 DE3921472C1 (en) | 1989-06-30 | 1989-06-30 | Device for gas generator - in which gas for inflating cushion for protecting travellers in vehicle crash can take two routes to gas outlet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0365453A true JPH0365453A (en) | 1991-03-20 |
Family
ID=6383976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2163013A Pending JPH0365453A (en) | 1989-06-30 | 1990-06-22 | Device for gas generator |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0365453A (en) |
| DE (1) | DE3921472C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010540336A (en) * | 2007-10-05 | 2010-12-24 | タカタ・ペトリ アーゲー | Gas generator and method for influencing the gas flow of a gas generator |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9113005U1 (en) * | 1991-10-19 | 1992-01-23 | Geisreiter, Christian, 8000 München | Gas generator |
| US5613705A (en) * | 1995-03-24 | 1997-03-25 | Morton International, Inc. | Airbag inflator having a housing protected from high-temperature reactive generated gases |
| DE19541798A1 (en) * | 1995-11-09 | 1997-05-15 | Temic Bayern Chem Airbag Gmbh | Gas generator with regulation of the propellant gas flow path and method for its operation |
| US7172214B2 (en) | 2002-12-09 | 2007-02-06 | Daicel Chemical Industries, Ltd. | Gas generator for air bag |
| JP2004203373A (en) * | 2002-12-09 | 2004-07-22 | Daicel Chem Ind Ltd | Gas generator for air bag |
| DE102006060580B4 (en) * | 2006-12-19 | 2009-04-30 | Carl Freudenberg Kg | Filter arrangement for filtering a fluid medium |
| JP6954520B2 (en) * | 2017-12-05 | 2021-10-27 | 株式会社ダイセル | Ignizer assembly and gas generator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4394033A (en) * | 1981-02-26 | 1983-07-19 | The Firestone Tire & Rubber Company | Temperature compensating elastic cone |
| US4380346A (en) * | 1981-04-24 | 1983-04-19 | Thiokol Corporation | Method of and apparatus for speeding the response of an air bag inflator at low temperatures |
| US4817828A (en) * | 1986-10-03 | 1989-04-04 | Trw Automotive Products Inc. | Inflatable restraint system |
-
1989
- 1989-06-30 DE DE19893921472 patent/DE3921472C1/en not_active Expired - Fee Related
-
1990
- 1990-06-22 JP JP2163013A patent/JPH0365453A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010540336A (en) * | 2007-10-05 | 2010-12-24 | タカタ・ペトリ アーゲー | Gas generator and method for influencing the gas flow of a gas generator |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3921472C1 (en) | 1990-11-15 |
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