CN101516689A - Pyrotechnic gas generator enclosing a perforated tubular casing - Google Patents
Pyrotechnic gas generator enclosing a perforated tubular casing Download PDFInfo
- Publication number
- CN101516689A CN101516689A CNA2007800344604A CN200780034460A CN101516689A CN 101516689 A CN101516689 A CN 101516689A CN A2007800344604 A CNA2007800344604 A CN A2007800344604A CN 200780034460 A CN200780034460 A CN 200780034460A CN 101516689 A CN101516689 A CN 101516689A
- Authority
- CN
- China
- Prior art keywords
- producer
- spacer
- combustion chamber
- chamber
- shell
- 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.)
- Granted
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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
- 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
- B60R2021/26058—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 a combination of inflators
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The present invention relates to a pyrotechnic gas generator for automobile safety, comprising a closed tubular casing (10) containing: at least one combustion chamber (C) containing a pyrotechnic charge (3) constituted by material in bulk, with combustion thereof being triggered by an initiator associated with the chamber (C); at least one plenum chamber (T) associated with said combustion chamber (C) and communicating therewith via at least one nozzle (130) that receives the gas generated by combustion of the charge (3) and serves to exhaust the gas to the outside via at least one discharge opening (100) formed in said casing (10). It is remarkable in that combustion chamber (C) and plenum chamber (T) are offset longitudinally, said nozzle (130) also extending longitudinally; that the zone (14) of the casing (10) situated in register with said combustion chamber (C) does not have any opening in communication with the outside.
Description
Technical field
The present invention relates to a kind of pyrotechnic gas generator that is used for automotive safety equipment.
Especially, it is designed to be generally used for to known safety air bag (English is " airbag ") inflation.
Background technology
A kind of like this producer comprises the osed top shell substantially, and it comprises that at least one contains the combustion chamber of pyrotechnical charge, wherein triggers burning by the initiating agent that connects this chamber.This shell also comprises at least one and described combustion chamber bonded assembly inflatable chamber, and this inflatable chamber receives the gas that produces by described powder charge burning, and guarantees that these gases are formed on outside discharge orifice on the described shell is discharged into via at least one.
When described pyrotechnical charge is made up of lozenge and the L/D ratio of described producer during greater than 1 (L=producer length, D=diameter), so just combustion problem may occur.
In fact, situation appears at, and burning concentrates at least in a part of powder charge.In fact, in the process that powder charge is lighted, have only the lozenge of corresponding point firearm inerrably to be lighted.Other lozenge is covered by these first lozenge, therefore can not with enough gas thermal communication to light rightly.The burning of first lozenge produces local excess pressure, in opening the process of combustion chamber, and its remaining powder charge of can crushing, or via the air-flow that is passed through it is corroded considerably.
Smash the rapid increase that lozenge causes unnecessary surface combustion, its result makes the rapid increase of the pressure in combustion chamber, thus the operation of interferance generator.
And, aggravate to corrode by force and at random, also weakened the repeatability of burning.
In order to address this problem, known method is a utilise combustible charge blocks, and it has the central openings that forms conduit, and this perforate is that gas has constituted a fire escape, and keeps good Methodistic and lasting burning.This central openings also forms a room that is used for firing unit.
When relating to the tubular generator of elongated shape particularly (big L/D ratio), uses so just damage easily of block powder charge that forms.In fact, for the propellant of equal in quality, use blocks to increase the size of producer.
Such producer especially is arranged on the top that flushes in the vehicle in door, with to airbag aeration, all " air-bag curtain (airbag curtain) " as is well known, or be integrated in and be used in the seat inflating to installing side airbag.
Owing to use pyrotechnical charge to loose in this producer type tritionally, that is, by the powder charge of the granule or the lozenge powder constituent of pyrotechnic material, this problem is difficult to solve more.
The producer of concentric structure has been described among document US-A-2006/082112.Extend a combustion chamber in the central, its lumen wall has the perforate that forms through hole.In fact, this expression, they can block the standard of determining with authorized pressure arrival by metallic film, and therefore promote to light.Therefore, this chamber wall has constituted the qualification to described combustion chamber.
Summary of the invention
Appear at the problem on the producer that early relates to type more than the objective of the invention is to solve, its burning that has realized powder charge very well in order and continue to carry out, and the excessive danger of in the powder charge combustion process, not burning.
This just relates to a kind of automotive safety design-calculated pyrotechnic gas generator that is, it comprises the osed top tube-like envelope, and this shell comprises:
-at least one combustion chamber, this combustion chamber comprise the pyrotechnical charge of being made up of bulk material (bulk material), and the burning of this pyrotechnical charge is by triggering with described chamber bonded assembly initiating agent;
-at least one inflatable chamber, this inflatable chamber is connected with described combustion chamber and is communicated with it via at least one mouth of pipe, this inflatable chamber receives the gas that is produced by the burning of powder charge, and guarantees that gas is discharged into the outside via the discharge orifice that at least one is formed on the described shell.
This producer is characterised in that, described combustion chamber and inflatable chamber vertically complementary (offsetlongitudinally), and the described mouth of pipe is longitudinal extension also; The section of described shell that is positioned at corresponding described combustion chamber place is without any the perforate that is communicated with the outside; And described combustion chamber vertically comprises the tubular partition of punching, the inner space of this spacer limits the volume that is used to receive and keep described powder charge, and the peripheral space between described spacer and shell does not contain powder charge, and constitutes at least one and be used for the passage of burning gases to the discharging of described inflatable chamber direction.
Can understand that the tubular partition of described punching has two functions from above.
At first, its formation and being defined for receives and keeps the volume of described flammable loose packed powder charge.
Yet it also limits at least one with the shell of described producer and is used to passage (or gargle pipe) that burning gases are evacuated to described inflatable chamber direction, and wherein this section of generator shell is not and extraneous bonded assembly perforate.Because the setting of passage just makes gas freely circulate, keep to burn and discharge via described inflatable chamber.
Other advantage and the indefiniteness of described producer are characterised in that:
-described shell and spacer are coaxial;
-described spacer has circular right section;
-described spacer has the right section of inscribe in circle and has the outline of crenelate, and its larger-diameter part supports in described shell;
-the end that is positioned at the spacer on described mouth of pipe next door has supported in order to protect described mouth of pipe screen;
It is conical that-described screen is, and its bottom supports in the described spacer that is penetrated with the described mouth of pipe;
-described producer is provided with at least one belt that comprises pyrotechnical charge, and described belt one end perforate is exposed to the inside of described inflatable chamber.
Further feature of the present invention and advantage will embody from following detailed description for specific embodiment.
Description of drawings
Describe below in conjunction with accompanying drawing, wherein:
Fig. 1 is longitudinal center's face section drawing of producer first embodiment of the present invention;
Fig. 2 is the section drawing along 2-2 line among Fig. 1 of this producer;
Fig. 3 is the view of similar Fig. 1 of the embodiment of the producer that is called " belt "; And it is last
Fig. 4 is longitudinal center's face section drawing of the 3rd embodiment of producer, and this producer comprises several combustion chambers and two straps.
The specific embodiment
Pyrotechnic gas generator 1 shown in Figure 1 comprises a columniform tube-like envelope 10, and wherein, tube wall is positioned on the disc ring body 11,12 at its each terminal place respectively; The ring liner (not shown) extends inward, to guarantee to block the tube wall on the ring body.
Similarly, wall abuts has an additional spacer 13, also is disc, and it is parallel to ring body 11,12 and extends.
This spacer is crossed by the described through hole 130 that forms a mouth of pipe hereinafter.(not shown) in different embodiment, the quantity of through hole can be greater than 1.Shell 10, and ring body 11 and 12 and spacer 13 are made by the metal with high mechanical resistance and thermal resistance.
Yet shell 10 is made by the metal with enough ductility, installs so that allow.
This producer comprises and pyrotechnical charge 3 (pyrotechnic charge) bonded assembly firing unit 2.These two parts all are located in the combustion chamber C on figure right side.
With known in essence mode, firing unit is installed in the core of ring body 11.Among the present invention, this firing unit is installed in an end of combustion chamber, provides the spacer 13 of through hole then to be installed in the end of this chamber.
The powder charge 3 that is included in the combustion chamber is the powder charge of being made up of propellant lozenge (propergolpastilles) in bulk at this.
Term " screen " can be understood as and means any punching unit, and wherein, perforate allows gas to pass through, but its size is elected the obstacle that formation lozenge passes through as.
According to the present invention, be positioned at corresponding combustion chamber C shell 10 section 14 not with the perforate of external communications.
In addition, combustion chamber C vertically comprises: the tubular partition 5 of punching, its inner space limits one and is used to receive and keep the volume of powder charge, peripheral space between this spacer 5 and shell 10 does not then contain powder charge, and constituting a passage E at least, this passage is used for burning gases and spills to the inflatable chamber direction.
Among the embodiment of accompanying drawing, shell 10 and spacer 5 are coaxial.
The latter is open and up to a side of spacer 13 in two end, and is against on the aforesaid screen 4.
As shown in Figure 2, more specifically, spacer 5 has the right section of inscribe in circle, and has the outline of crenelate, and its larger-diameter part 51 supports in shell 10.
Because this kind outward appearance, spacer is positioned with respect to shell, and does not need to use the centring adjustment instrument with respect to the latter.The crenation thing that is produced defines all multi-channel E, to be used for gas to circulation of inflatable chamber T direction and discharging.
In a conversion embodiment, not shown, spacer 5 has the diapire of punching at the one end, and it directly is against on the spacer 13.Under other condition, can save screen 4.
Certainly, also not shown in a further embodiment, spacer 5 can have the strict circular right section that is, it requires to use the locking tool (pole) of this spacer opposite shell.
Embodiment shown in Figure 3 has and the very similar structure of the producer of Fig. 1.Yet its of installing comprises for example belt 6 of the additional pyrotechnical charge of gel propellant (gellified propergol) form.Such structure particularly comes from document FR-A-2 845989 originally as known.
Utilize so a kind of producer, in case there are a large amount of hot gas to arrive inflatable chambers, be included in the just burning of powder charge in the long band, it spills via deflation hole 100 then, and provide extra material to producer bonded assembly air bag, continue gas filed purpose to reach it.
The embodiment of Fig. 4 relates to a kind of producer with initiating agent 2, and this initiating agent is positioned at midway location, and according to the orientation perpendicular to central combustion chamber C, this central authorities combustion chamber relies on two spacers 15 and is connected with additional combustion chamber C1 and the C2 that is provided with that correspond to each other.
These combustion chambers C1 and C2 are connected with an inflatable chamber T1 and T2 again respectively separately, and each inflatable chamber all accommodates a belt 6.
In this embodiment, each combustion chamber C1 and C2 are provided with a spacer as indicated above 5.
Claims (7)
1. pyrotechnic gas generator that is used for engine vehicle safety, described producer comprises osed top tube-like envelope (10), described shell comprises:
-at least one combustion chamber (C), this combustion chamber comprise the pyrotechnical charge of being made up of bulk material (3), and it burns by triggering with described chamber (C) bonded assembly initiating agent;
-at least one inflatable chamber (T), described inflatable chamber is connected with described combustion chamber (C) and is communicated with it via at least one mouth of pipe (130), described inflatable chamber receives the gas that is produced by powder charge (3) burning, and supplied gas is formed on the discharge orifice (100) on the described shell (10) via at least one and is discharged into the outside; It is characterized in that,
-described combustion chamber (C) and inflatable chamber (T) are vertically complementary, and the described mouth of pipe (130) is longitudinal extension also;
-be positioned at the perforate that the section (14) of aiming at the described shell (10) that described combustion chamber (C) locates is not in communication with the outside;
-and described combustion chamber (C) vertically comprise the tubular partition (5) of punching, this spacer has the inner space, limit therein and be used for receiving and keeping the volume of described powder charge (3), and the peripheral space (E) that is positioned between described spacer (5) and the described shell (10) does not contain powder charge, and constitutes the passage that at least one is used for discharging to described inflatable chamber (T) burning gases.
2. producer according to claim 1 is characterized in that, described shell (10) and spacer (5) are coaxial.
3. producer according to claim 1 and 2 is characterized in that, described spacer (5) has circular right section.
4. producer according to claim 1 and 2 is characterized in that, described spacer (5) has the right section of inscribe in circle, and has the outline of crenelate, and its larger-diameter part (51) supports in described shell (10).
5. according to above any described producer of claim, it is characterized in that the end that is positioned at the spacer (5) on the described mouth of pipe (130) next door supports the screen (4) in order to protect the described mouth of pipe.
6. producer according to claim 5 is characterized in that, described screen (4) is conical and has the bottom, and described bottom supports in the described spacer (13) that is penetrated with the described mouth of pipe.
7. according to above any described producer of claim, it is characterized in that described producer is provided with at least one belt that comprises pyrotechnical charge, described belt one end perforate is exposed to the inside of described inflatable chamber (T).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0608204A FR2906022B1 (en) | 2006-09-20 | 2006-09-20 | "PYROTECHNIC GAS GENERATOR WITH ADJUSTED TUBULAR FENCE" |
| FR06/08204 | 2006-09-20 | ||
| PCT/EP2007/059804 WO2008034807A1 (en) | 2006-09-20 | 2007-09-17 | Pyrotechnic gas generator enclosing a perforated tubular casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101516689A true CN101516689A (en) | 2009-08-26 |
| CN101516689B CN101516689B (en) | 2011-08-31 |
Family
ID=37982470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800344604A Expired - Fee Related CN101516689B (en) | 2006-09-20 | 2007-09-17 | Pyrotechnic gas generator enclosing a perforated tubular casing |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5009990B2 (en) |
| CN (1) | CN101516689B (en) |
| DE (1) | DE112007002052B4 (en) |
| FR (1) | FR2906022B1 (en) |
| WO (1) | WO2008034807A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102713497A (en) * | 2010-02-01 | 2012-10-03 | 奥托立夫开发公司 | Gas generator and manufacturing method thereof |
| CN105658484A (en) * | 2013-11-07 | 2016-06-08 | 株式会社大赛璐 | Gas generator |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6399781B2 (en) * | 2014-03-31 | 2018-10-03 | 日本化薬株式会社 | Gas generator |
| DE102014223006B4 (en) * | 2014-11-11 | 2018-02-22 | Takata AG | Gas generator assembly with integrated gas channels |
| DE102019200433A1 (en) * | 2019-01-16 | 2020-04-02 | Vitesco Technologies GmbH | Airbag module |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951042A (en) * | 1997-11-06 | 1999-09-14 | Trw Inc. | Vehicle occupant protection apparatus |
| FR2831123B1 (en) * | 2001-10-19 | 2004-07-30 | Livbag Snc | HYBRID GAS GENERATING DEVICE USED IN AUTOMOTIVE SAFETY FOR INFLATING A LATERAL PROTECTION CUSHION |
| FR2845989B1 (en) * | 2002-10-18 | 2004-12-24 | Livbag Snc | FLEXIBLE GAS GENERATOR FOR AUTOMOTIVE SAFETY, DEVICE USING SUCH A GENERATOR AND PYROTECHNIC COMPOSITION USED IN SUCH A GENERATOR |
| JP2005112003A (en) * | 2003-10-02 | 2005-04-28 | Daicel Chem Ind Ltd | Gas generator |
| JP4280161B2 (en) * | 2003-12-22 | 2009-06-17 | ダイセル化学工業株式会社 | Gas generator for airbag |
| US7237801B2 (en) * | 2004-08-31 | 2007-07-03 | Automotive Systems Laboratory, Inc. | Gas generating system |
| WO2006044516A2 (en) * | 2004-10-14 | 2006-04-27 | Automotive Systems Laboratory, Inc. | Gas generator |
| WO2007005824A2 (en) * | 2005-06-30 | 2007-01-11 | Automotive Systems Laboratory, Inc. | Gas generator |
| DE202005011657U1 (en) * | 2005-07-25 | 2005-12-15 | Trw Airbag Systems Gmbh | Gas generator sieve insert for vehicle airbag system, has side section with hole arrangement and sizes which do not form continuous hole-free section along length of sieve |
-
2006
- 2006-09-20 FR FR0608204A patent/FR2906022B1/en not_active Expired - Fee Related
-
2007
- 2007-09-17 CN CN2007800344604A patent/CN101516689B/en not_active Expired - Fee Related
- 2007-09-17 DE DE112007002052.0T patent/DE112007002052B4/en not_active Expired - Fee Related
- 2007-09-17 WO PCT/EP2007/059804 patent/WO2008034807A1/en active Application Filing
- 2007-09-17 JP JP2009527844A patent/JP5009990B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102713497A (en) * | 2010-02-01 | 2012-10-03 | 奥托立夫开发公司 | Gas generator and manufacturing method thereof |
| CN102713497B (en) * | 2010-02-01 | 2015-04-01 | 奥托立夫开发公司 | Gas generator and manufacturing method thereof |
| CN105658484A (en) * | 2013-11-07 | 2016-06-08 | 株式会社大赛璐 | Gas generator |
| CN105658484B (en) * | 2013-11-07 | 2019-09-24 | 株式会社大赛璐 | Gas generator |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112007002052T5 (en) | 2009-08-13 |
| DE112007002052B4 (en) | 2014-08-28 |
| CN101516689B (en) | 2011-08-31 |
| WO2008034807A8 (en) | 2008-05-08 |
| JP2010503576A (en) | 2010-02-04 |
| WO2008034807A1 (en) | 2008-03-27 |
| JP5009990B2 (en) | 2012-08-29 |
| FR2906022B1 (en) | 2010-12-24 |
| FR2906022A1 (en) | 2008-03-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20170917 |