DE102011115522A1 - Gas generator useful for a vehicle safety system and a module, comprises housing with combustion chamber, outflow opening, coolant chamber, and piston, where coolant chamber extends into piston, before activation of the gas generator - Google Patents

Gas generator useful for a vehicle safety system and a module, comprises housing with combustion chamber, outflow opening, coolant chamber, and piston, where coolant chamber extends into piston, before activation of the gas generator

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Publication number
DE102011115522A1
DE102011115522A1 DE102011115522A DE102011115522A DE102011115522A1 DE 102011115522 A1 DE102011115522 A1 DE 102011115522A1 DE 102011115522 A DE102011115522 A DE 102011115522A DE 102011115522 A DE102011115522 A DE 102011115522A DE 102011115522 A1 DE102011115522 A1 DE 102011115522A1
Authority
DE
Germany
Prior art keywords
gas generator
piston
coolant
chamber
housing
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
Application number
DE102011115522A
Other languages
German (de)
Inventor
Manfred Biebl
Achim Hofmann
Karsten Schwuchow
Johann Seidl
Ning Wei
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TRW Airbag Systems GmbH
Original Assignee
TRW Airbag Systems GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TRW Airbag Systems GmbH filed Critical TRW Airbag Systems GmbH
Priority to DE102011115522A priority Critical patent/DE102011115522A1/en
Publication of DE102011115522A1 publication Critical patent/DE102011115522A1/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26Inflatable 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
    • B60R21/264Inflatable 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26Inflatable 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
    • B60R2021/26017Inflatable 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 a cooling agent being added to the inflation fluid

Abstract

A gas generator, in particular for a vehicle safety system, has a housing in which a combustion chamber containing a pyrotechnic propellant charge, in which hot gas can be generated, is arranged. The housing has at least one outflow opening to the surroundings of the gas generator. In the housing, a coolant chamber is arranged, in which a cooling liquid is added before activation of the gas generator. The gas generator additionally has a piston displaceable upon activation of the gas generator, by means of which the cooling fluid can be forced out of the coolant chamber. Before activation of the gas generator, the coolant chamber extends at least partially into the piston, so that an inner region of the piston is filled with coolant. A module includes a gas generator, a gas bag inflatable by the inflator, and attachment means for attaching the module to a vehicle. A vehicle safety system, in particular for the protection of a person, for example a vehicle occupant or passers-by, has a gas generator, a gas bag inflatable by this as part of a module, and an electronic control unit by means of which the gas generator can be activated in the event of a triggering situation.

Description

  • The invention relates to a gas generator. In particular, the invention relates to a gas generator for a vehicle safety system, with a housing in which a combustion chamber containing a pyrotechnic propellant, in which hot gas can be generated, is arranged. The housing has at least one outflow opening to the surroundings of the gas generator, and a coolant chamber arranged in the housing, in which a cooling liquid is received before activation of the gas generator. Furthermore, a displaceable upon activation of the gas generator piston is provided, by means of which the cooling liquid can be pressed out of the coolant chamber. In addition, the invention relates to a module with such a gas generator and a vehicle safety system.
  • In gas generators with pyrotechnic propellants that generate a hot gas that is used to operate a vehicle safety system such as a belt tensioner or a gas bag, it is advantageous to adjacent parts of the safety system, for example, the inlet mouth of the airbag or in the immediate vicinity of the belt tensioner lying Verdämmmm ago Protect heat from the outflowing hot gas.
  • It is known to provide for reducing the temperature of the outflowing hot gas in the gas generator, a coolant container from which a cooling liquid flows by means of a piston in the interior of the gas generator where it is mixed with the hot gas generated from the pyrotechnic propellant and thereby cools the hot gas.
  • A gas generator of the type mentioned is beispielsweisein US 2010/0013201 A1 disclosed. In it shows the 1 a gas generator 100 with a piston 136 , the one opening 148 did that with a rupture disk 152 is sealed. One in the gas generator 100 contained pyrotechnic propellant 104 generates, after activation of the gas generator, a hot gas 160 which is the piston 136 towards a chamber with a coolant 144 moves, causing the rupture disk 152 is broken and the coolant 144 through the opening 148 in the area of the hot gas 160 streams to mix with this and to cool this. The entire chamber with the coolant 144 is in the axial direction of the gas generator 100 to the piston 136 arranged adjacent. The length of such a gas generator is directly dependent on the axial length of the chamber with the cooling liquid.
  • In contrast, it is an object of the invention to provide an improved gas generator, in particular with regard to its overall length, with an optimized cooling system for hot gases of the gas generator.
  • For a gas generator of the type mentioned above, this object is achieved in that before activation of the gas generator, the coolant chamber at least partially extends into the piston so that an inner region of the piston is filled with coolant.
  • In such a gas generator, areas of the piston can themselves absorb a coolant and thus be used, so to speak, as part of a continuing coolant chamber. An axially adjacent to the piston coolant chamber can then be made smaller, in particular shorter in terms of their axial length, designed to obtain a compactly-built gas generator.
  • Preferably, the cooling liquid arranged in the gas generator is not flammable. For example, water with freezing point lowering additives such as CaCl 2 may be used. It is only important that the cooling liquid in a temperature range of about -35 to + 85 ° C, ie the intended operating temperatures of a gas generator in a vehicle, is liquid.
  • The cooling liquid can mix in the interior of the gas generator with the hot gas generated by the pyrotechnic propellant and / or evaporate in this area to cool the hot gas already inside the gas generator.
  • The inner region of the piston filled with cooling fluid before activation of the gas generator is preferably designed as at least one coolant channel, the at least one coolant channel having a coolant outlet opening, in particular on the end face of the piston facing the combustion chamber, which is closed by a closure element.
  • When the gas generator is activated, at least part of the cooling liquid can be pushed out by the at least one coolant channel by means of the displaceable piston.
  • By such a configuration, in which the cooling liquid is present in the piston in one or more channels, the cooling liquid can be pre-portioned before activation of the gas generator, so to speak, z. By dimensioning the length and diameter of the one or more channels. In addition, by a locally advantageous positioning of the coolant outlet opening (s) a favorable range of the release of the coolant and thus an optimum range of mixing with the hot gases are selected. If a plurality of coolant outlet openings are formed, they can by different Verschusselemente with z. B. different materials (eg., Copper, steel, aluminum) and / or in each case different material thicknesses are closed. After activation of the gas generator, this has the consequence that the individual Verschusselemente are destructible at different times by the herausdrückbare cooling liquid and thus a temporally optimized cooling, for. B. over a longer period, can be realized.
  • The at least one coolant channel can be rectilinear and / or its center line encloses an angle with the axial direction of the gas generator, wherein in particular the combustion chamber facing the end of the coolant channel is positioned closer to the housing of the gas generator, as the combustion chamber remote from the end of the coolant channel. As a result, areas of the hot gas that are close to the at least one outflow opening in the housing of the gas generator can be optimally cooled before it leaves the gas generator.
  • The cooling liquid can also emerge at least partially in liquid form from the at least one outflow opening of the housing of the gas generator.
  • This is possible due to an immediate spatial proximity of the coolant outlet opening to the outflow opening in the housing of the gas generator, since in this way the outflowing hot gas entrains and atomizes the cooling fluid during the outflow.
  • According to a further inventive embodiment of a gas generator of the type mentioned above, the coolant chamber is substantially annular, wherein in particular a housing portion along the circumference of the housing of the gas generator forms an outer region of the coolant chamber.
  • According to a further inventive embodiment of a gas generator of the aforementioned type forms a substantially annular disc facing away from the combustion chamber, the frontal boundary of the coolant chamber, wherein the disc has a passage opening for the piston.
  • According to a further inventive embodiment of a gas generator of the type mentioned, the piston, in particular an axial extension of the piston, before activation of the gas generator at least partially into the coolant chamber, in particular through this, extend.
  • It is conceivable to combine the features of all the individual inventive embodiments with one another and / or with one or more features of the respectively associated preferred embodiments.
  • Since, as described above, an area of the piston, in particular an axial extension of the piston, at least partially extends into the coolant chamber, ie does not have to be arranged axially in series with the coolant chamber, the overall length of the gas generator can be correspondingly reduced.
  • Furthermore, the combustion chamber can be separated from the region of the housing containing the coolant chamber by a cross-sectional reduction in the housing, in particular by an element with a passage whose diameter is smaller than the inner diameter of the housing. In particular, the element may be a nozzle, a filter or the like. Due to the cross-sectional reduction, the hot gas flowing out of the combustion chamber can be focused, for example, on a mechanism for squeezing out the cooling fluid from the coolant chamber. In order to influence the pressure increase in the region of the coolant chamber or of the piston, it is advantageous to close the throughflow opening formed by the cross-sectional reduction with a bursting membrane or dam, which is destroyed only at a predetermined pressure level.
  • With regard to a module, the invention has for its object to provide a module with reduced dimensions. With regard to a module aspect, the object is achieved by a module having a gas generator, an airbag inflatable by the gas generator and a fastening device for attaching the module to a vehicle, wherein the gas generator is designed according to at least one of the preceding features. Characterized in that, as described above, the coolant chamber can be made shorter in terms of their axial length, a reduced dimension is also achieved for the gas generator and finally the module containing the gas generator. The module, the fastening device and the inflatable airbag are not shown in detail in the figure of the present invention.
  • With regard to a vehicle safety system, the object of the invention is to provide a vehicle safety system which is better tunable to the installation situation in the vehicle. With regard to a vehicle safety system aspect, the object is achieved by a vehicle safety system, in particular for the protection of a person, for example a vehicle occupant or passers-by, with a gas generator, one of this inflatable airbag, as part of the module, and an electronic control unit, by means of which the gas generator can be activated in the presence of a triggering situation, wherein the gas generator is designed according to at least one of the preceding features. By achieving, as described above, a gas generator and a module of smaller dimensions, these components of the vehicle safety system can be accommodated in locations of the vehicle which are advantageous for the installation of the vehicle safety system and which allow only small dimensions.
  • The invention will be described below with reference to an embodiment and with reference to the attached 1 , which shows a schematic sectional view of a gas generator according to the invention according to an embodiment, described in more detail.
  • 1 shows a gas generator 10 , which is a tubular housing 12 that has the gas generator 10 completes towards the environment. In the case 12 is a combustion chamber 16 provided, which is only hinted at here and in which a pyrotechnic propellant, not shown here is added. The ignition of the pyrotechnic propellant for the production of hot gas via a (also not shown) lighter, via which the gas generator 10 can be activated by an electronic control unit upon detection of a trigger situation. The electronic control unit and sensors for detecting the triggering situation are part of the vehicle safety system according to the invention.
  • In the axial direction A, which is the longitudinal axis of the gas generator 10 corresponds, closes to the combustion chamber 16 another chamber 18 on, by the combustion chamber 16 through a wall with a cross-section reduction 20 is disconnected. The cross-section reduction 20 is formed here as a shape of a nozzle and reduces the cross section in the interior of the housing 12 in a known way. Before activation of the gas generator 10 is the combustion chamber 16 from the chamber 18 separated by a bursting membrane, not shown here.
  • In the chamber 18 are outflow openings 22 in the case 12 , preferably formed in the form of a ring.
  • Furthermore, in the chamber 18 , in the axial direction A with respect to the cross-section reduction 20 , a movable piston 26 arranged. The piston 26 is formed in two parts and has as a first part a trough-shaped piston base portion which on the outer peripheral surface of its wall on the inner surface of the tubular housing 12 of the gas generator 10 borders. The wall portion of this piston base portion has channels 50 on, at their the combustion chamber 16 facing front side coolant outlet openings 28 having, which with a closure element 52 are closed. The channels 50 extend through the piston base region and occur at the combustion chamber 16 opposite end face unlocked.
  • The bottom region of the trough-shaped piston base region adjoins a second part of the piston 26 , namely to a particular cylindrical extension 62 of the piston 26 at. The two parts, the trough-shaped piston base area and the extension 62 are firmly connected to each other, for example, welded, glued or screwed together. Likewise, the entire piston as a single, continuous injection molding z. B. made of plastic or metal.
  • In the axial direction A, adjacent to the piston base region, a substantially annular coolant chamber closes 24 which has a direct fluid connection with the channels 50 of the piston 26 having.
  • As a limitation of the coolant chamber 24 is further in the axial direction A an annular disc 56 arranged, which is fixedly connected to a likewise in the axial direction A adjacent annular plate 58 , in turn, firmly, in particular tight, with the housing 12 of the gas generator 10 connected is. The aforementioned two solid compounds are preferably designed as welded joints. The outer diameter of the plate 58 corresponds to the inner diameter of the tubular housing 12 of the gas generator 10 , The plate 58 is provided along its inner diameter with a circumferential groove into which an annular sealing element 54b inserted in such a way that it is between the plate 58 and the disc 56 is trapped. It is also conceivable that one of the two components of the disc 56 or the plate 58 is saved, so is not needed, in which case at least one of these two components with the housing 12 is connected in a sealing manner.
  • The cylindrical extension 62 of the piston 26 extends in the axial direction A through the respective annular successively arranged components coolant chamber 24 , Disc 56 , Sealing element 54b and plate 58 therethrough.
  • The coolant chamber 24 is in the in 1 shown initial position of the piston 26 , ie before activation of the gas generator 10 , filled with a suitable coolant. For filling the coolant chamber 24 with the coolant is the gas generator 10 placed in a vertical position, ie the in 1 shown axial direction A has in Essentially vertically down. Here are the coolant outlet openings for the time being 28 of the channels 50 not yet with a closure element 52 locked. Through the coolant outlet openings 28 Now, the cooling liquid can be filled, for example by a syringe-like metering device, so that successively the entire coolant chamber 24 including the channels in fluid communication with her 50 be filled with the cooling liquid. Thereafter, the coolant outlet openings 28 of the channels 50 with the closure element 52 hermetically sealed.
  • It is also an alternative filling of the coolant chamber 24 possible with coolant, in which the piston 26 from its two subcomponents, namely the trough-shaped piston base region and the extension 62 , is assembled. This is the gas generator 10 also placed in a vertical position, but rotated by 180 °, as previously described, ie the in 1 shown axial direction A has substantially vertically upward. Thereafter, the trough-shaped piston base region as the first sub-component of the piston 26 in the case 12 used and the coolant outlet openings 28 of the channels 50 be with a closure element 52 locked. Then the disc 56 , the plate 58 and the sealing element 54b in the case 12 used and positioned so that a desired, predetermined volume for the cooling liquid results after the assembly steps described below. Now the cooling liquid is introduced from above, by first the channels 50 and then the annular coolant chamber 24 be filled, the coolant chamber 24 not completely filled. Finally, the second subcomponent of the piston 26 , the extension 62 , into the coolant chamber 24 introduced and with the first subcomponent of the piston 26 , the trough-shaped piston base region, firmly connected, preferably screwed. By inserting the extension 62 into the coolant chamber 24 Of course, there is the cooling liquid located there through the volume of the extension 62 displaced accordingly. The previous assembly steps, inserting disc 56 , Plate 58 and sealing element 54b and introducing a certain amount of cooling liquid, are preferably coordinated so that after assembly of the extension 62 a predetermined volume for the cooling liquid is achieved, wherein in particular the cooling liquid the entire space of the coolant chamber 24 and the space of the channels 50 fills so that no air pockets are present.
  • As the cooling liquid, for example, water having a freezing-point lowering additive such as CaCl 2 can be used. Other suitable cooling fluids may also be used.
  • Along the peripheral surface of the trough-shaped piston base region a circumferential groove is mounted, in which an annular sealing element 54a is inserted, which directly to the inner surface of the tubular housing 12 of the gas generator 10 borders. The sealing element 54a forms a seal on the one hand to hot gases in the chamber 18 (The hot gases are described in more detail below) and on the other to the coolant from the coolant chamber 24 ,
  • The sealing element described above 54b also seals against the coolant from the coolant chamber 24 from. Both sealing elements 54a and 54b can be used as known O-rings with conventional materials such. As elastomers, rubber compounds or the like, and are designed such that the piston 26 moves well and through the sealing elements 54a and 54b not slowed down unnecessarily.
  • The piston 26 is designed so that it can without much friction against the surfaces of its adjacent components, such as housing 12 , Disc 56 , Sealing element 54b and plate 58 , lets move.
  • The housing 12 of the gas generator 10 can at its the extension 62 of the piston 26 facing end face by a cover 64 , For example, a plastic cap, be closed, to protect against contamination from the environment of the gas generator 10 ,
  • It is also possible the housing 12 and the extension 62 of the piston 26 shortened, so that these two components are substantially flush with the plate 58 complete as in 1 shown schematically by the dashed line B. This results in extremely short overall lengths of the gas generator 10 realizable.
  • Alternatively, it is possible for the case 12 still a certain range over the position of the plate 58 extends in the axial direction A, as in 1 shown. This allows further, not shown components in this area of the housing 12 be attached, such as one from the housing 12 radially projecting fastening bolt, which serves as a connection of the gas generator 10 can serve to the module of the vehicle safety system.
  • When activating the gas generator 10 becomes the propellant in the combustion chamber 16 ignited and begins to develop hot gas. The hot gas flows, after opening the bursting membrane, not shown, by the cross-section reduction 20 in the chamber 18 and leaves from there over the outflow 22 the housing 12 , The outflow openings 22 are dimensioned so that initially only a small proportion of the hot gas is the chamber 18 leaves directly. The majority of the hot gas is in the chamber 18 initially held or swirled and continuously increases the internal pressure in the chamber 18 so that the piston 26 characterized in the axial direction A is set in motion. The movement of the piston 26 is also made possible by the effective area of the piston, to which the internal pressure of the chamber 18 acts larger than the effective area of the piston acting on the coolant in the coolant chamber 24 suppressed. The resulting pressure difference causes a rupture of the closure element 52 the coolant outlet openings 28 so that coolant over the channels 50 in the chamber 18 can flow in. The piston 26 is continuously axially against the coolant chamber 24 pressed until essentially all of the coolant over the channels 50 in the chamber 18 is delivered.
  • Here, a part of the from the coolant chamber 24 vaporizing exiting cooling liquid, wherein the heat of vaporization, the outflowing hot gas is cooled. Vaporizing can increase the escaping gas volume, increasing the total gas volume exiting.
  • In addition, a portion of the exiting coolant can be atomized into small drops and through the chamber 18 escaping hot gas be entrained, so that this part of the cooling liquid in the environment of the gas generator 10 can pass, causing the gas generator 10 adjacent components wetted with this coolant and thus can be protected from thermal stress by hot gases.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • US 2010/0013201 A1 [0004]

Claims (9)

  1. Gas generator, in particular for a vehicle safety system, having a housing ( 12 ), in which a combustion chamber containing a pyrotechnic propellant ( 16 ), in which hot gas can be generated, is arranged, and the at least one outflow opening ( 22 ) to the environment of the gas generator ( 10 ), and one in the housing ( 12 ) arranged coolant chamber ( 24 ), before activation of the gas generator ( 10 ) a cooling liquid is received, and one upon activation of the gas generator ( 10 ) displaceable piston ( 26 ), by means of which the cooling liquid from the coolant chamber ( 24 ) can be pushed out, characterized in that before activation of the gas generator ( 10 ) the coolant chamber ( 24 ) at least partially into the piston ( 26 ) extends so that an inner region of the piston ( 26 ) is filled with coolant.
  2. Gas generator according to claim 1, characterized in that before activation of the gas generator ( 10 ) filled with coolant inner region of the piston ( 26 ) as at least one coolant channel ( 50 ), wherein the at least one coolant channel ( 50 ) a coolant outlet opening ( 28 ), in particular at the combustion chamber ( 16 ) facing the end face of the piston ( 26 ), which by a closure element ( 52 ) is closed.
  3. Gas generator according to claim 2, characterized in that the at least one coolant channel ( 50 ) runs in a straight line and / or its center line with the axial direction (A) of the gas generator ( 10 ) includes an angle, in particular that of the combustion chamber ( 16 ) facing the end of the coolant channel ( 50 ) closer to the housing ( 12 ) of the gas generator ( 10 ) than that of the combustion chamber ( 16 ) facing away from the end of the coolant channel ( 50 ).
  4. Gas generator according to at least one of the preceding claims, characterized in that upon activation of the gas generator ( 10 ) at least a part of the cooling liquid through the at least one coolant channel ( 50 ) by means of the displaceable piston ( 26 ) is herausdrückbar.
  5. Gas generator according to the preamble of claim 1 and / or according to at least one of the preceding claims, characterized in that the coolant chamber ( 24 ) is substantially annular, wherein in particular a housing portion along the circumference of the housing ( 12 ) of the gas generator ( 10 ) forms an outer region of the coolant chamber.
  6. Gas generator according to the preamble of claim 1 and / or according to at least one of the preceding claims, characterized in that a substantially annular disc ( 56 ) one of the Brennkamer ( 16 ) facing away, frontal boundary of the coolant chamber ( 24 ), wherein the disc ( 56 ) a passage opening for the piston ( 26 ), and / or characterized in that the piston ( 26 ), in particular an axial extension ( 62 ) of the piston ( 26 ), before activation of the gas generator ( 10 ) at least partially into the coolant chamber ( 24 ), in particular through this, extends.
  7. Gas generator according to at least one of the preceding claims, characterized in that the combustion chamber ( 16 ) of which the coolant chamber ( 24 ) containing area of the housing ( 12 ) by a cross-section reduction ( 20 ) in the housing ( 12 ), in particular by an element with a passage whose diameter is smaller than the inner diameter of the housing ( 12 ) is separated.
  8. Module with a gas generator ( 10 ), one of the gas generator ( 10 ) inflatable airbag and a fastening device for mounting the module to a vehicle, characterized in that the gas generator ( 10 ) according to at least one of the preceding claims 1 to 7 is formed.
  9. Vehicle safety system, in particular for the protection of a person, for example a vehicle occupant or passers-by, with a gas generator ( 10 ), one of this inflatable airbag, as part of the module, and an electronic control unit, by means of which the gas generator ( 10 ) is activated in the presence of a triggering situation, characterized in that the gas generator ( 10 ) according to at least one of the preceding claims 1 to 7 is formed.
DE102011115522A 2011-10-11 2011-10-11 Gas generator useful for a vehicle safety system and a module, comprises housing with combustion chamber, outflow opening, coolant chamber, and piston, where coolant chamber extends into piston, before activation of the gas generator Pending DE102011115522A1 (en)

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DE102011115522A DE102011115522A1 (en) 2011-10-11 2011-10-11 Gas generator useful for a vehicle safety system and a module, comprises housing with combustion chamber, outflow opening, coolant chamber, and piston, where coolant chamber extends into piston, before activation of the gas generator

Applications Claiming Priority (1)

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DE102011115522A DE102011115522A1 (en) 2011-10-11 2011-10-11 Gas generator useful for a vehicle safety system and a module, comprises housing with combustion chamber, outflow opening, coolant chamber, and piston, where coolant chamber extends into piston, before activation of the gas generator

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DE102011115522A1 true DE102011115522A1 (en) 2013-04-11

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3026088A1 (en) * 1979-07-11 1981-02-05 Vn Proizv Ob Soyuzgaz Gas generator
DE29821232U1 (en) * 1998-11-26 1999-04-01 Trw Airbag Sys Gmbh & Co Kg Gas generator for a security system
DE19753074C1 (en) * 1997-11-29 1999-06-10 Tieu Anh Dung Gas generator for a vehicle safety system
DE19954738A1 (en) * 1999-11-12 2001-05-31 Petri Dn Gmbh Inflator Systems Hybrid gas generator for inflation of airbags in motor vehicles has fuel gas container closed by burst unit with support unit against internal container pressure
DE60102414T2 (en) * 2000-05-30 2005-05-04 Livbag S.N.C. Hybrid gas generator with a bored post
US20100013201A1 (en) 2008-07-17 2010-01-21 Autoliv Asp, Inc. Liquid cooled hybrid

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3026088A1 (en) * 1979-07-11 1981-02-05 Vn Proizv Ob Soyuzgaz Gas generator
DE19753074C1 (en) * 1997-11-29 1999-06-10 Tieu Anh Dung Gas generator for a vehicle safety system
DE29821232U1 (en) * 1998-11-26 1999-04-01 Trw Airbag Sys Gmbh & Co Kg Gas generator for a security system
DE19954738A1 (en) * 1999-11-12 2001-05-31 Petri Dn Gmbh Inflator Systems Hybrid gas generator for inflation of airbags in motor vehicles has fuel gas container closed by burst unit with support unit against internal container pressure
DE60102414T2 (en) * 2000-05-30 2005-05-04 Livbag S.N.C. Hybrid gas generator with a bored post
US20100013201A1 (en) 2008-07-17 2010-01-21 Autoliv Asp, Inc. Liquid cooled hybrid

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