WO2014187790A1 - Gas generator - Google Patents

Gas generator Download PDF

Info

Publication number
WO2014187790A1
WO2014187790A1 PCT/EP2014/060274 EP2014060274W WO2014187790A1 WO 2014187790 A1 WO2014187790 A1 WO 2014187790A1 EP 2014060274 W EP2014060274 W EP 2014060274W WO 2014187790 A1 WO2014187790 A1 WO 2014187790A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
igniter
gas
propellant charge
temperature
Prior art date
Application number
PCT/EP2014/060274
Other languages
French (fr)
Inventor
Franck Camborde
Patrice CILLARD
Original Assignee
Autoliv Development Ab
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 Autoliv Development Ab filed Critical Autoliv Development Ab
Publication of WO2014187790A1 publication Critical patent/WO2014187790A1/en

Links

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
    • B60R21/268—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 release of stored pressurised gas
    • B60R21/272—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 release of stored pressurised gas with means for increasing the pressure of the gas just before or during liberation, e.g. hybrid inflators
    • 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
    • B60R2021/26029—Ignitors

Definitions

  • the present invention generally relates to a gas generator for inflating an automotive safety cushion.
  • EP2321 156B1 discloses a gas generator with an igniter capable of generating a pressure wave to open a seal sealing a reserve of gas under pressure.
  • this system has the particular disadvantage of requiring to provide an opening in the propellant which would be arranged between the igniter and the cover, to provide a passage to the pressure wave.
  • This particular arrangement increases the cost of obtaining the components, in particular the propellant, which is already one of the most expensive components of a gas generator.
  • the position of the components inside the gas generator must be precise to ensure alignment of the passage with the igniter for example, which increases the complexity of the assembly operations and their cost.
  • the compactness of the gas generator is affected by the presence of this opening, because the propellant loading will have to be lengthened to obtain the desired mass of pyrotechnic material.
  • the thickness of the propellant block with internal channel will be very small and fragile, which can cause breakages of this propellant and variations in the combustion rate leading to unacceptable performance dispersions. This solution is therefore unsuitable for small diameter generators.
  • An object of the present invention is to meet the disadvantages of the document of the prior art mentioned above and in particular, first of all, to propose a generator with an igniter which generates a pressure wave to open a lid, but whose manufacturing costs are reduced.
  • a first aspect of the invention relates to a gas generator comprising:
  • a pressurized gas chamber stored at a first temperature, and comprising a discharge orifice sealed with a lid,
  • an igniter arranged to generate a pressure wave in the pressurized gas chamber
  • propellant charge arranged at least in a part of the pressurized gas chamber, the propellant charge being arranged to be ignited by the igniter and to generate combustion gases at a second temperature higher than the first temperature
  • the pressure wave being predetermined to open the lid so that at least a portion of the gases under pressure at the first temperature out of the chamber before the combustion gases generated by the propellant charge at the second temperature
  • the propellant charge is arranged between the igniter and the discharge port and is traversed by the pressure wave generated by the igniter and opening the operculum.
  • the generator according to the invention is simple because there is no need for opening in the propellant to allow passage to the pressure wave, since it passes through the propellant charge. The components are thus simplified and their cost decreases. It should be noted that the portion of the propellant charge arranged between the igniter and the cap is located in the path of the pressure wave, ie in a straight line between the igniter and the cap.
  • propellant is arranged in a cylindrical zone of the chamber, the cylindrical zone being defined by a directing line running through a base curve, the base curve being the perimeter of the discharge orifice, and the straight line director being defined so that the cylindrical zone contains at least a portion of the igniter that generates the pressure wave.
  • the pressure wave generated by the igniter which opens the discharge orifice thus necessarily passes through part of the propellant charge.
  • the cap is arranged to withstand a predetermined minimum pressure
  • the igniter is arranged to generate a predetermined quantity of hot gas, this quantity of predetermined hot gas mixed with the pressurized gases stored at the first temperature in the chamber determines a pressure of the mixed gases in the chamber, lower than the predetermined minimum pressure.
  • the opening of the cap is only performed by the pressure wave, since the rise in pressure due to gas and heat created by the igniter is not sufficient to exceed the minimum breakdown pressure. of the operculum.
  • the gas chamber has at least one inner section arranged between the igniter and the discharge orifice, and the at least one inner section is completely occupied by the said at least part of the propellant charge.
  • the compactness of the generator is improved because the entire free section of the chamber is occupied by the loading of propellant, between the igniter and the lid.
  • the propellant charge is totally arranged between the igniter and the discharge orifice.
  • the compactness of the gas generator is improved, and the components are simplified by a propellant charge located exclusively inside the gas chamber, between the igniter and the seal.
  • the chamber has a tubular shape and an internal volume, and the propellant charge occupies at least 70% of the internal volume of the chamber.
  • the compactness of the gas generator is improved.
  • the propellant charge occupies at least 15% of the internal volume of the chamber, more particularly at least 30% of the internal volume of the chamber, and even more particularly at least 50% of the internal volume of the chamber.
  • the gas generator comprises a grid between the propellant charge and the discharge orifice, and the gate is arranged to retain the propellant charge before being ignited by the igniter. As long as the propellant has a large size, it can not pass through the grate and obstruction of the discharge port is avoided.
  • the gas generator comprises a grid between the igniter and the propellant charge, and the gate is arranged to retain the propellant charge before being ignited by the igniter.
  • the gate is arranged to retain the propellant charge before being ignited by the igniter.
  • the chamber has a tubular shape with an internal diameter less than or equal to 19 millimeters.
  • the internal volume of the chamber is limited, which limits the dilution of the energy of the pressure wave.
  • the chamber has a tubular shape with an internal diameter less than or equal to 23 millimeters.
  • the gases are stored in the gas chamber at a pressure of at least 45 MPa.
  • the propagation of the pressure wave is facilitated.
  • the igniter comprises at least one pyrotechnic substance
  • the generator comprises a wall arranged between the said at least one pyrotechnic material and the gases under pressure of the gas chamber, the wall is arranged to break at a predetermined breaking pressure created by the said at least one pyrotechnic material, and the predetermined breaking pressure is at least twice the storage pressure of the gases under pressure in the gas chamber.
  • the propagation of the pressure wave is facilitated.
  • the loading of propellant is a bulk load. Such loading of bulk propellant is economical.
  • the bulk load consists of pellets.
  • the propellant pellets have a diameter greater than or equal to 1.5 millimeters and less than or equal to 5 millimeters.
  • a second aspect of the invention is an automotive safety module comprising at least one gas generator according to the first aspect of the invention.
  • a third aspect of the invention is a motor vehicle comprising at least one automotive safety module according to the second aspect of the invention.
  • a final aspect of the invention is a method of inflating an automobile safety cushion by a gas generator, the gas generator comprising:
  • a pressurized gas chamber stored at a first temperature, and comprising a discharge orifice sealed with a lid,
  • an igniter arranged to generate a pressure wave in the gas chamber
  • a propellant charge arranged at least in part of the pressurized gas chamber, at least partly between the igniter and the discharge orifice, the propellant charge being arranged to be ignited by the igniter and to generate combustion gas at a second temperature higher than the first temperature
  • FIG. 1 shows a sectional view of a gas generator according to the invention.
  • FIG. 1 shows a sectional view of a gas generator which comprises a chamber 10 of pressurized gas closed at a first end by a subassembly comprising an igniter 20 and at a second end by a discharge orifice 1 1 sealed by a lid 12.
  • the latter is arranged between a perforated body 40 pushed by an elastic spring bearing on the subassembly comprising the igniter 20, and a gate 60 positioned in the vicinity of the discharge port 1 1.
  • the perforated body 40 and the grid 60 each have orifices smaller than at least one dimension of the pellets constituting the propellant charge 30 so that the pellets constituting the propellant charge remain between the perforated body 40 and the grid 60 that the gas generator did not work.
  • the dimension of the chamber 10 may for example be such that its inside diameter is less than or equal to 19 millimeters and its length between 100 and 250 millimeters, more particularly between 180 and 220 millimeters for example.
  • the propellant pellets may have a circular shape with a diameter ranging from 1.5 millimeters to 5 millimeters, and a thickness ranging from 1.3 to 3.5 millimeters, for example.
  • To measure the volume of the propellant charge the method of measuring the dimensions of the components of the propellant charge is followed, and the volume calculation corresponding for example by tomography. If the propellant charge has complex shapes, its volume can be measured by immersion in a liquid with a measurement of the volume of the liquid before / after immersion.
  • the gas mixture it is stored at ambient temperature (between -40 ° C. and + 90 ° C., depending on the meteorological conditions) in the chamber 10 with a pressure at least equal to 30 MPa at 23 ° C. Good operating results are obtained with a storage pressure greater than or equal to 60 MPa at 23 ° C.
  • a mixture of inert gases comprising in particular Argon (from 75% to 95% by weight), and Helium (from 5% to 25% by mass) is preferred because it there will be no chemical reactions of this gaseous mixture during the combustion of the propellant charge 30.
  • other gaseous mixtures may be stored under pressure, including reactive gases such as oxygen, hydrogen or hydrocarbons.
  • the discharge orifice 1 1 is formed in a diffuser 50 which is directly welded to the chamber 10.
  • this component combines two functions (control of the gas outlet flow rate through the discharge port 1 1 and diffusion of gases by a multitude of holes), which reduces the costs of the gas generator.
  • the support igniter 21 comprises a sealed wall 21 which forms a barrier to the pressurized gases contained in the chamber 10, and separates them from the igniter 20.
  • the wall 21a of the igniter support is arranged to open under the constraint of gases from the igniter 20 at a breaking pressure greater than twice the pressure gas storage pressure. This breaking pressure can be measured during a pressurization test with a liquid introduced in place of the igniter.
  • the igniter 20 is ignited by an electric current for example. It follows that the wall 21a is subjected to the pressure of the gases and hot particles created by the igniter 20, to cause its rupture, at a pressure of 150MPa for example. This rupture pressure can be measured during a hydraulic test, by introducing a liquid instead of the igniter and applying a pressure increase speed of between 300 MPa.s -1 and 600 MPa.s -1 . That is, a part that breaks at 150 MPa will break approximately 0.36 seconds after the start of pressurization.
  • This rupture at high pressure causes the appearance of a pressure wave in the pressurized gases of the chamber 10 and which moves along the chamber 10 at a speed at least equal to that of the sound in the gas mixture under pressure at room temperature.
  • the pressure wave thus moves along the chamber 10, through the propellant charge 30, to the discharge port 11 and its seal 12.
  • the pressure wave impacts the seal 12, and it breaks to let the pressurized gas stored at room temperature, and they can escape through the diffuser 50 to a safety cushion, not shown.
  • the propellant charge 30 is arranged between the igniter 20 and the discharge port 11, which simplifies the structure, since there is no need to leave a central channel between these two components.
  • the pressure wave passes through the propellant charge before opening the seal 12, which is permitted by the combination of the following parameters: the rupture pressure of the wall 21a, the volume of the chamber 10, and the pressure storage of gases under pressure.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

A gas generator comprising: • - a chamber (10) of pressurised gas stored at a first temperature, and comprising a discharge port (11) sealed by a lid (12), • - an igniter (20) arranged to generate a pressure wave in the pressurised gas chamber, • - a propellant charge (30) arranged at least in a portion of the pressurised gas chamber (10), the propellant charge being arranged to be ignited by the igniter and to generate combustion gases at a second temperature higher than the first temperature, the pressure wave being predetermined to open the lid such that at least a portion of the gases pressurised at the first temperature exit the chamber (10) before the combustion gases generated by the propellant charge (30) at the second temperature, characterised in that at least a portion of the propellant charge is arranged between the igniter (20) and the discharge port (11) and is traversed by the pressure wave that is generated by the igniter and opens the lid (12).

Description

G E N E RATE U R D E GAZ  G E N E RATE GAS R E
La présente invention concerne de manière générale un générateur de gaz pour gonfler un coussin de sécurité automobile. The present invention generally relates to a gas generator for inflating an automotive safety cushion.
Il est connu dans l'art antérieur des générateurs de gaz. Ainsi, le document EP2321 156B1 décrit un générateur de gaz avec un allumeur capable de générer une onde de pression pour ouvrir un opercule scellant une réserve de gaz sous pression. En contrepartie, ce système présente notamment l'inconvénient de nécessiter de ménager une ouverture dans du propergol qui serait agencé entre l'allumeur et l'opercule, pour offrir un passage à l'onde de pression. Cet agencement particulier augmente le coût d'obtention des composants, en particulier le propergol qui est déjà un des composants les plus coûteux d'un générateur de gaz. De plus, la position des composants à l'intérieur du générateur de gaz doit être précise pour garantir l'alignement du passage avec l'allumeur par exemple, ce qui augmente la complexité des opérations d'assemblage et leur coût. Enfin, il est à noter que la compacité du générateur de gaz est affectée par la présence de cette ouverture, car le chargement de propergol devra être allongé pour obtenir la masse de matière pyrotechnique désirée. Dans le cas d'un générateur de petit diamètre, l'épaisseur du bloc propergol avec canal interne sera très faible et fragile, ce qui peut provoquer des casses de ce propergol et des variations du régime de combustion conduisant à des dispersions de performance inacceptables. Cette solution est donc inadaptée pour des générateurs de petit diamètre. It is known in the prior art of gas generators. Thus, EP2321 156B1 discloses a gas generator with an igniter capable of generating a pressure wave to open a seal sealing a reserve of gas under pressure. In return, this system has the particular disadvantage of requiring to provide an opening in the propellant which would be arranged between the igniter and the cover, to provide a passage to the pressure wave. This particular arrangement increases the cost of obtaining the components, in particular the propellant, which is already one of the most expensive components of a gas generator. In addition, the position of the components inside the gas generator must be precise to ensure alignment of the passage with the igniter for example, which increases the complexity of the assembly operations and their cost. Finally, it should be noted that the compactness of the gas generator is affected by the presence of this opening, because the propellant loading will have to be lengthened to obtain the desired mass of pyrotechnic material. In the case of a small diameter generator, the thickness of the propellant block with internal channel will be very small and fragile, which can cause breakages of this propellant and variations in the combustion rate leading to unacceptable performance dispersions. This solution is therefore unsuitable for small diameter generators.
Un but de la présente invention est de répondre aux inconvénients du document de l'art antérieur mentionné ci-dessus et en particulier, tout d'abord, de proposer un générateur avec un allumeur qui génère une onde de pression pour ouvrir un opercule, mais dont les coûts de fabrication sont réduits. Pour cela un premier aspect de l'invention concerne un générateur de gaz comprenant : An object of the present invention is to meet the disadvantages of the document of the prior art mentioned above and in particular, first of all, to propose a generator with an igniter which generates a pressure wave to open a lid, but whose manufacturing costs are reduced. For this, a first aspect of the invention relates to a gas generator comprising:
- une chambre de gaz sous pression stockés à une première température, et comprenant un orifice de décharge scellé par un opercule,  a pressurized gas chamber stored at a first temperature, and comprising a discharge orifice sealed with a lid,
- un allumeur agencé pour générer une onde de pression dans la chambre de gaz sous pression, an igniter arranged to generate a pressure wave in the pressurized gas chamber,
- un chargement de propergol agencé au moins dans une partie de la chambre de gaz sous pression, le chargement de propergol étant agencé pour être allumé par l'allumeur et générer des gaz de combustion à une deuxième température supérieure à la première température,  a propellant charge arranged at least in a part of the pressurized gas chamber, the propellant charge being arranged to be ignited by the igniter and to generate combustion gases at a second temperature higher than the first temperature,
l'onde de pression étant prédéterminée pour ouvrir l'opercule afin qu'au moins une partie des gaz sous pression à la première température sortent de la chambre avant les gaz de combustion générés par le chargement de propergol à la deuxième température, the pressure wave being predetermined to open the lid so that at least a portion of the gases under pressure at the first temperature out of the chamber before the combustion gases generated by the propellant charge at the second temperature,
caractérisé en ce qu'au moins une partie du chargement de propergol est agencée entre l'allumeur et l'orifice de décharge et est traversée par l'onde de pression générée par l'allumeur et allant ouvrir l'opercule. Le générateur selon l'invention est simple car il n'y a pas besoin de ménager d'ouverture dans le propergol pour laisser un passage à l'onde de pression, puisque celle-ci traverse le chargement de propergol. Les composants sont ainsi simplifiés et leur coût diminue. Il est à noter que la partie du chargement de propergol agencée entre l'allumeur et l'opercule est située sur le trajet de l'onde de pression, c'est à dire en ligne droite entre l'allumeur et l'opercule. characterized in that at least a portion of the propellant charge is arranged between the igniter and the discharge port and is traversed by the pressure wave generated by the igniter and opening the operculum. The generator according to the invention is simple because there is no need for opening in the propellant to allow passage to the pressure wave, since it passes through the propellant charge. The components are thus simplified and their cost decreases. It should be noted that the portion of the propellant charge arranged between the igniter and the cap is located in the path of the pressure wave, ie in a straight line between the igniter and the cap.
Selon une mise en œuvre, du propergol est agencé dans une zone cylindrique de la chambre, la zone cylindrique étant définie par une droite directrice parcourant une courbe de base, la courbe de base étant le périmètre de l'orifice de décharge, et la droite directrice étant définie de sorte que la zone cylindrique contienne au moins une portion de l'allumeur qui génère l'onde de pression. L'onde de pression générée par l'allumeur qui ouvre l'orifice de décharge traverse ainsi nécessairement une partie du chargement de propergol. Selon une mise en œuvre, l'opercule est agencé pour résister à une pression minimale prédéterminée, l'allumeur est agencé pour générer une quantité de gaz chauds prédéterminée, cette quantité de gaz chauds prédéterminée mélangée aux gaz sous pression stockés à la première température dans la chambre détermine une pression des gaz mélangés dans la chambre, inférieure à la pression minimale prédéterminée. Selon cette mise en œuvre, l'ouverture de l'opercule est uniquement réalisée par l'onde de pression, puisque la montée en pression due aux gaz et à la chaleur créés par l'allumeur ne suffit pas à dépasser la pression minimale de claquage de l'opercule. According to one embodiment, propellant is arranged in a cylindrical zone of the chamber, the cylindrical zone being defined by a directing line running through a base curve, the base curve being the perimeter of the discharge orifice, and the straight line director being defined so that the cylindrical zone contains at least a portion of the igniter that generates the pressure wave. The pressure wave generated by the igniter which opens the discharge orifice thus necessarily passes through part of the propellant charge. According to one embodiment, the cap is arranged to withstand a predetermined minimum pressure, the igniter is arranged to generate a predetermined quantity of hot gas, this quantity of predetermined hot gas mixed with the pressurized gases stored at the first temperature in the chamber determines a pressure of the mixed gases in the chamber, lower than the predetermined minimum pressure. According to this implementation, the opening of the cap is only performed by the pressure wave, since the rise in pressure due to gas and heat created by the igniter is not sufficient to exceed the minimum breakdown pressure. of the operculum.
Selon une mise en œuvre, la chambre de gaz présente au moins une section intérieure agencée entre l'allumeur et l'orifice de décharge, et ladite au moins une section intérieure est complètement occupée par ladite au moins une partie du chargement de propergol. Selon cette mise en œuvre, la compacité du générateur est améliorée, car toute la section libre de la chambre est occupée par le chargement de propergol, entre l'allumeur et l'opercule.  According to one embodiment, the gas chamber has at least one inner section arranged between the igniter and the discharge orifice, and the at least one inner section is completely occupied by the said at least part of the propellant charge. According to this implementation, the compactness of the generator is improved because the entire free section of the chamber is occupied by the loading of propellant, between the igniter and the lid.
Selon une mise en œuvre, le chargement de propergol est totalement agencé entre l'allumeur et l'orifice de décharge. La compacité du générateur de gaz est améliorée, et les composants sont simplifiés par un chargement de propergol situé exclusivement à l'intérieur de la chambre de gaz, entre l'allumeur et l'opercule.  According to one embodiment, the propellant charge is totally arranged between the igniter and the discharge orifice. The compactness of the gas generator is improved, and the components are simplified by a propellant charge located exclusively inside the gas chamber, between the igniter and the seal.
Selon une mise en œuvre, la chambre présente une forme tubulaire et un volume interne, et le chargement de propergol occupe au moins 70% du volume interne de la chambre. La compacité du générateur de gaz est améliorée.  According to one embodiment, the chamber has a tubular shape and an internal volume, and the propellant charge occupies at least 70% of the internal volume of the chamber. The compactness of the gas generator is improved.
Selon une mise en œuvre, le chargement de propergol occupe au moins 15% du volume interne de la chambre, plus particulièrement au moins 30% du volume interne de la chambre, et encore plus particulièrement au moins 50 % du volume interne de la chambre. Selon une mise en œuvre, le générateur de gaz comprend une grille entre le chargement de propergol et l'orifice de décharge, et la grille est agencée pour retenir le chargement de propergol avant d'être allumé par l'allumeur. Tant que le propergol présente une dimension importante, il ne peut pas passer au travers de la grille et l'obstruction de l'orifice de décharge est évitée. According to one embodiment, the propellant charge occupies at least 15% of the internal volume of the chamber, more particularly at least 30% of the internal volume of the chamber, and even more particularly at least 50% of the internal volume of the chamber. According to one embodiment, the gas generator comprises a grid between the propellant charge and the discharge orifice, and the gate is arranged to retain the propellant charge before being ignited by the igniter. As long as the propellant has a large size, it can not pass through the grate and obstruction of the discharge port is avoided.
Selon une mise en œuvre, le générateur de gaz comprend une grille entre l'allumeur et le chargement de propergol, et la grille est agencée pour retenir le chargement de propergol avant d'être allumé par l'allumeur. On peut envisager d'exercer un effort constant sur la grille agencée entre l'allumeur et le chargement de propergol, pour éviter tout déplacement du chargement de propergol lors du cycle de vie en véhicule.  According to one embodiment, the gas generator comprises a grid between the igniter and the propellant charge, and the gate is arranged to retain the propellant charge before being ignited by the igniter. One can consider to exert a constant effort on the grid arranged between the igniter and the loading of propellant, to avoid any displacement of the propellant charge during the cycle of life in vehicle.
Selon une mise en œuvre, la chambre présente une forme tubulaire avec un diamètre interne inférieur ou égal à 19 millimètres. Le volume interne de la chambre est limité, ce qui limite la dilution de l'énergie de l'onde de pression.  According to one embodiment, the chamber has a tubular shape with an internal diameter less than or equal to 19 millimeters. The internal volume of the chamber is limited, which limits the dilution of the energy of the pressure wave.
Selon une mise en œuvre, la chambre présente une forme tubulaire avec un diamètre interne inférieur ou égal à 23 millimètres. According to one embodiment, the chamber has a tubular shape with an internal diameter less than or equal to 23 millimeters.
Selon une mise en œuvre, les gaz sont stockés dans la chambre de gaz à une pression d'au moins 45MPa. La propagation de l'onde de pression est facilitée.  According to one implementation, the gases are stored in the gas chamber at a pressure of at least 45 MPa. The propagation of the pressure wave is facilitated.
Selon une mise en œuvre :  According to one implementation:
- l'allumeur comprend au moins une matière pyrotechnique,  the igniter comprises at least one pyrotechnic substance,
- le générateur comprend une paroi agencée entre ladite au moins une matière pyrotechnique et les gaz sous pression de la chambre de gaz, la paroi est agencée pour se rompre à une pression de rupture prédéterminée créée par la dite au moins une matière pyrotechnique, et la pression de rupture prédéterminée est au moins le double de la pression de stockage des gaz sous pression dans la chambre de gaz. La propagation de l'onde de pression est facilitée. Selon une mise en œuvre, le chargement de propergol est un chargement en vrac. Un tel chargement de propergol en vrac est économique. the generator comprises a wall arranged between the said at least one pyrotechnic material and the gases under pressure of the gas chamber, the wall is arranged to break at a predetermined breaking pressure created by the said at least one pyrotechnic material, and the predetermined breaking pressure is at least twice the storage pressure of the gases under pressure in the gas chamber. The propagation of the pressure wave is facilitated. According to one implementation, the loading of propellant is a bulk load. Such loading of bulk propellant is economical.
Selon une mise en œuvre, le chargement en vrac est constitué de pastilles.  According to one implementation, the bulk load consists of pellets.
Selon une mise en œuvre, les pastilles de propergol présentent un diamètre supérieur ou égal à 1 .5 millimètres et inférieur ou égal à 5 millimètres.  According to one embodiment, the propellant pellets have a diameter greater than or equal to 1.5 millimeters and less than or equal to 5 millimeters.
Un second aspect de l'invention est un module de sécurité automobile comprenant au moins un générateur de gaz selon le premier aspect de l'invention.  A second aspect of the invention is an automotive safety module comprising at least one gas generator according to the first aspect of the invention.
Un troisième aspect de l'invention est un véhicule automobile comprenant au moins un module de sécurité automobile selon le deuxième aspect de l'invention. Un dernier aspect de l'invention est un procédé de gonflage d'un coussin de sécurité automobile par un générateur de gaz, le générateur de gaz comprenant : A third aspect of the invention is a motor vehicle comprising at least one automotive safety module according to the second aspect of the invention. A final aspect of the invention is a method of inflating an automobile safety cushion by a gas generator, the gas generator comprising:
- une chambre de gaz sous pression stockés à une première température, et comprenant un orifice de décharge scellé par un opercule,  a pressurized gas chamber stored at a first temperature, and comprising a discharge orifice sealed with a lid,
- un allumeur agencé pour générer une onde de pression dans la chambre de gaz, an igniter arranged to generate a pressure wave in the gas chamber,
- un chargement de propergol agencé au moins dans une partie de la chambre de gaz sous pression, au moins en partie entre l'allumeur et l'orifice de décharge, le chargement de propergol étant agencé pour être allumé par l'allumeur et générer des gaz de combustion à une deuxième température supérieure à la première température,  a propellant charge arranged at least in part of the pressurized gas chamber, at least partly between the igniter and the discharge orifice, the propellant charge being arranged to be ignited by the igniter and to generate combustion gas at a second temperature higher than the first temperature,
le procédé comprenant les étapes consistant à : the method comprising the steps of:
- allumer l'allumeur,  - turn on the igniter,
- générer avec l'allumeur une onde de pression dans la chambre de gaz, - traverser ladite au moins une partie du chargement de propergol avec l'onde de pression - generating with the igniter a pressure wave in the gas chamber, - passing through said at least a portion of the propellant charge with the pressure wave
- ouvrir l'opercule scellant l'orifice de décharge avec l'onde de pression, - open the seal sealing the discharge port with the pressure wave,
- allumer le chargement de propergol - turn on the propellant charge
- laisser sortir de la chambre au moins une partie des gaz sous pression à la première température seuls,  leaving at least a portion of the gases under pressure at the first temperature out of the chamber alone,
- laisser ensuite sortir de la chambre le reste des gaz sous pression à la première température, simultanément avec les gaz de combustion à la deuxième température.  - Then leave the rest of the gas under pressure at the first temperature out of the chamber, simultaneously with the combustion gases at the second temperature.
D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description détaillée qui suit d'un mode de réalisation de l'invention donné à titre d'exemple nullement limitatif et illustré par les dessins annexés, dans lesquels :  Other features and advantages of the present invention will appear more clearly on reading the following detailed description of an embodiment of the invention given by way of non-limiting example and illustrated by the appended drawings, in which:
- la figure 1 représente une vue en coupe d'un générateur de gaz selon l'invention. La figure 1 représente une vue en coupe d'un générateur de gaz qui comprend une chambre 10 de gaz sous pression fermée à une première extrémité par un sous ensemble comprenant un allumeur 20 et à une deuxième extrémité par un orifice de décharge 1 1 scellé par un opercule 12.  - Figure 1 shows a sectional view of a gas generator according to the invention. FIG. 1 shows a sectional view of a gas generator which comprises a chamber 10 of pressurized gas closed at a first end by a subassembly comprising an igniter 20 and at a second end by a discharge orifice 1 1 sealed by a lid 12.
Un chargement de propergol 30, constitué de pastilles, est agencé dans la chambre 10, avec les gaz sous pression. Afin de garantir un positionnement correct du chargement de propergol 30 dans la chambre 10, celui-ci est agencé entre un corps perforé 40 poussé par un ressort élastique prenant appui sur le sous ensemble comprenant l'allumeur 20, et une grille 60 positionné à proximité de l'orifice de décharge 1 1 . Le corps perforé 40 et la grille 60 présentent chacun des orifices de taille inférieure à au moins une dimension des pastilles constituant le chargement de propergol 30 de sorte que les pastilles constituant le chargement de propergol 30 restent entre le corps perforé 40 et la grille 60 tant que le générateur de gaz n'a pas fonctionné. La dimension de la chambre 10 peut par exemple être telle que son diamètre intérieur est inférieur ou égal à 19 millimètres et sa longueur comprise entre 100 et 250 millimètres, plus particulièrement entre 180 et 220 millimètres par exemple. A propellant charge 30, consisting of pellets, is arranged in the chamber 10, with the gases under pressure. In order to guarantee correct positioning of the propellant charge 30 in the chamber 10, the latter is arranged between a perforated body 40 pushed by an elastic spring bearing on the subassembly comprising the igniter 20, and a gate 60 positioned in the vicinity of the discharge port 1 1. The perforated body 40 and the grid 60 each have orifices smaller than at least one dimension of the pellets constituting the propellant charge 30 so that the pellets constituting the propellant charge remain between the perforated body 40 and the grid 60 that the gas generator did not work. The dimension of the chamber 10 may for example be such that its inside diameter is less than or equal to 19 millimeters and its length between 100 and 250 millimeters, more particularly between 180 and 220 millimeters for example.
Les pastilles de propergol peuvent avoir une forme circulaire avec un diamètre allant de 1 .5 millimètres à 5 millimètres, et une épaisseur allant de 1 .3 à 3.5 millimètres par exemple. Pour mesurer le volume du chargement de propergol, on suit la méthode consistant à mesurer les dimensions des composants du chargement de propergol, et à effectuer le calcul de volume correspondant par exemple par tomographie. Si le chargement de propergol présente des formes complexes, on peut mesurer son volume par immersion dans un liquide avec mesure de volume du liquide avant/après immersion.  The propellant pellets may have a circular shape with a diameter ranging from 1.5 millimeters to 5 millimeters, and a thickness ranging from 1.3 to 3.5 millimeters, for example. To measure the volume of the propellant charge, the method of measuring the dimensions of the components of the propellant charge is followed, and the volume calculation corresponding for example by tomography. If the propellant charge has complex shapes, its volume can be measured by immersion in a liquid with a measurement of the volume of the liquid before / after immersion.
En ce qui concerne le mélange gazeux, celui-ci est stocké à température ambiante (entre -40 °C et +90 °C selon les conditions météorologiques) dans la chambre 10 avec une pression au moins égale à 30MPa à 23 °C. De bons résultats de fonctionnement sont obtenus avec une pression de stockage supérieure ou égale à 60MPa à 23 °C. Plusieurs compositions peuvent être envisagées, par exemple un mélange de gaz inertes comprenant notamment de l'Argon (de 75% à 95% en masse), et de l'Hélium (de 5% à 25% en masse) est préféré, car il n'y aura pas de réactions chimiques de ce mélange gazeux pendant la combustion du chargement de propergol 30. Cependant, d'autres mélanges gazeux peuvent être stockés sous pression, y compris des gaz réactifs tels que de l'oxygène, de l'hydrogène ou des hydrocarbures.  As regards the gas mixture, it is stored at ambient temperature (between -40 ° C. and + 90 ° C., depending on the meteorological conditions) in the chamber 10 with a pressure at least equal to 30 MPa at 23 ° C. Good operating results are obtained with a storage pressure greater than or equal to 60 MPa at 23 ° C. Several compositions can be envisaged, for example a mixture of inert gases comprising in particular Argon (from 75% to 95% by weight), and Helium (from 5% to 25% by mass) is preferred because it there will be no chemical reactions of this gaseous mixture during the combustion of the propellant charge 30. However, other gaseous mixtures may be stored under pressure, including reactive gases such as oxygen, hydrogen or hydrocarbons.
L'orifice de décharge 1 1 est ménagé dans un diffuseur 50 qui est directement soudé sur la chambre 10. Ainsi, ce composant cumule deux fonctions (pilotage du débit de sortie des gaz par l'orifice de décharge 1 1 et diffusion des gaz par une multitude de trous), ce qui réduit les coûts du générateur de gaz. Du côté de l'allumeur 20, celui-ci est maintenu par un sertissage 22 dans un support allumeur 21 soudé sur la chambre 10. Le support allumeur 21 comprend une paroi 21 a étanche qui forme une barrière aux gaz sous pression contenus dans la chambre 10, et les sépare de l'allumeur 20. La paroi 21 a du support allumeur est agencée pour s'ouvrir sous la contrainte de gaz issus de l'allumeur 20 à une pression de rupture supérieure au double de la pression de stockage de gaz sous pression. Cette pression de rupture peut être mesurée lors d'un test de mise en pression avec un liquide introduit à la place de l'allumeur. The discharge orifice 1 1 is formed in a diffuser 50 which is directly welded to the chamber 10. Thus, this component combines two functions (control of the gas outlet flow rate through the discharge port 1 1 and diffusion of gases by a multitude of holes), which reduces the costs of the gas generator. On the side of the igniter 20, it is held by a crimping 22 in an igniter support 21 welded to the chamber 10. The support igniter 21 comprises a sealed wall 21 which forms a barrier to the pressurized gases contained in the chamber 10, and separates them from the igniter 20. The wall 21a of the igniter support is arranged to open under the constraint of gases from the igniter 20 at a breaking pressure greater than twice the pressure gas storage pressure. This breaking pressure can be measured during a pressurization test with a liquid introduced in place of the igniter.
En cas de choc véhicule, l'allumeur 20 est mis à feu par un courant électrique par exemple. Il s'ensuit que la paroi 21 a est soumise à la pression des gaz et particules chaudes créés par l'allumeur 20, jusqu'à provoquer sa rupture, à une pression de 150MPa par exemple. On peut mesurer cette pression de rupture lors d'un test hydraulique, en introduisant un liquide à la place de l'allumeur et appliquant une vitesse de montée en pression comprise entre 300MPa.s"1 et 600MPa.s"1. C'est-à-dire qu'une pièce dont la rupture se situe à 150MPa rompra environ 0.36 secondes après le début de la mise en pression. In case of vehicle shock, the igniter 20 is ignited by an electric current for example. It follows that the wall 21a is subjected to the pressure of the gases and hot particles created by the igniter 20, to cause its rupture, at a pressure of 150MPa for example. This rupture pressure can be measured during a hydraulic test, by introducing a liquid instead of the igniter and applying a pressure increase speed of between 300 MPa.s -1 and 600 MPa.s -1 . That is, a part that breaks at 150 MPa will break approximately 0.36 seconds after the start of pressurization.
Cette rupture à haute pression provoque l'apparition d'une onde de pression dans les gaz sous pression de la chambre 10 et qui se déplace le long de la chambre 10 à une vitesse au moins égale à celle du son dans le mélange de gaz sous pression à la température ambiante. L'onde de pression se déplace donc le long de la chambre 10, à travers le chargement de propergol 30, vers l'orifice de décharge 1 1 et son opercule 12. Lorsque l'onde de pression a traversé la chambre 10 et le chargement de propergol 30, elle impacte l'opercule 12, et celui-ci se rompt pour laisser passer les gaz sous pression stockés à température ambiante, et ceux-ci peuvent s'échapper par le diffuseur 50 vers un coussin de sécurité, non représenté. This rupture at high pressure causes the appearance of a pressure wave in the pressurized gases of the chamber 10 and which moves along the chamber 10 at a speed at least equal to that of the sound in the gas mixture under pressure at room temperature. The pressure wave thus moves along the chamber 10, through the propellant charge 30, to the discharge port 11 and its seal 12. When the pressure wave has passed through the chamber 10 and the loading propellant 30, it impacts the seal 12, and it breaks to let the pressurized gas stored at room temperature, and they can escape through the diffuser 50 to a safety cushion, not shown.
Dés l'ouverture de la paroi 21 a, des particules chaudes de l'allumeur 20 pénètrent dans la chambre 10 et rencontrent des pastilles du chargement de propergol 30, et les allument. La combustion de ces pastilles du chargement de propergol 30 génère des gaz chauds, à une température généralement supérieure à 1000°C. Le chargement de propergol 30 s'allume rapidement, mais les gaz chauds issus de la combustion ne se déplacent pas dans la chambre aussi vite que l'onde de pression, et ils n'arrivent à l'orifice de décharge 1 1 que lorsque celui-ci est déjà ouvert et a déjà laissé passé une partie des gaz sous pression stockés à la température ambiante. Ainsi, ce sont ces gaz sous pression à température ambiante (ou même refroidis lors de la détente dans le diffuseur 50) qui ont pénétré les premiers dans le coussin de sécurité et ont commencé à le déployer, ce qui limite les agressions thermiques sur le matériau du coussin. As soon as the wall 21a has opened, hot particles of the igniter 20 penetrate into the chamber 10 and meet the pellets of the propellant charge 30, and light them. The combustion of these pellets from the propellant charge 30 generates hot gases at a temperature generally above 1000 ° C. The loading of propellant 30 lights up quickly, but the hot gases from combustion do not move in the chamber as fast as the pressure wave, and they arrive at the discharge port 1 1 when it is already open and has already left some of the pressurized gases stored at room temperature. Thus, it is these pressurized gases at ambient temperature (or even cooled during expansion in the diffuser 50) which have penetrated the first ones in the safety cushion and have begun to deploy it, which limits the thermal aggressions on the material. cushion.
De plus, le chargement de propergol 30 est agencé entre l'allumeur 20 et l'orifice de décharge 1 1 , ce qui simplifie la structure, car il n'y a pas besoin de laisser un canal central entre ces deux composants. L'onde de pression traverse le chargement de propergol avant d'ouvrir l'opercule 12, ce qui est permis par la combinaison des paramètres suivants : la pression de rupture de la paroi 21 a, le volume de la chambre 10, et la pression de stockage des gaz sous pression.  In addition, the propellant charge 30 is arranged between the igniter 20 and the discharge port 11, which simplifies the structure, since there is no need to leave a central channel between these two components. The pressure wave passes through the propellant charge before opening the seal 12, which is permitted by the combination of the following parameters: the rupture pressure of the wall 21a, the volume of the chamber 10, and the pressure storage of gases under pressure.
On comprendra que diverses modifications et/ou améliorations évidentes pour l'homme du métier peuvent être apportées aux différents modes de réalisation de l'invention décrits dans la présente description sans sortir du cadre de l'invention défini par les revendications annexées. It will be understood that various modifications and / or improvements obvious to those skilled in the art can be made to the various embodiments of the invention described in the present description without departing from the scope of the invention defined by the appended claims.

Claims

R EV EN D I CATI ON S R EV IN DI CATI ON S
1 . Générateur de gaz comprenant : 1. Gas generator comprising:
- une chambre (10) de gaz sous pression stockés à une première température, et comprenant un orifice de décharge (1 1 ) scellé par un opercule (12),  a chamber (10) of pressurized gas stored at a first temperature, and comprising a discharge orifice (1 1) sealed by a lid (12),
- un allumeur (20) agencé pour générer une onde de pression dans la chambre (10) de gaz sous pression,  an igniter (20) arranged to generate a pressure wave in the chamber (10) of gas under pressure,
- un chargement de propergol (30) agencé au moins dans une partie de la chambre (10) de gaz sous pression, le chargement de propergol (30) étant agencé pour être allumé par l'allumeur (20) et générer des gaz de combustion à une deuxième température supérieure à la première température,  a propellant charge (30) arranged at least in a portion of the chamber (10) of pressurized gas, the propellant charge (30) being arranged to be ignited by the igniter (20) and to generate combustion gases; at a second temperature higher than the first temperature,
l'onde de pression étant prédéterminée pour ouvrir l'opercule (12) afin qu'au moins une partie des gaz sous pression à la première température sortent de la chambre (10) avant les gaz de combustion générés par le chargement de propergol (30) à la deuxième température, the pressure wave being predetermined to open the seal (12) so that at least a portion of the gases under pressure at the first temperature exit the chamber (10) before the combustion gases generated by the propellant charge (30). ) at the second temperature,
caractérisé en ce qu'au moins une partie du chargement de propergol (30) est agencée entre l'allumeur (20) et l'orifice de décharge (1 1 ) et est traversée par l'onde de pression générée par l'allumeur (20) et allant ouvrir l'opercule (12). characterized in that at least a portion of the propellant charge (30) is arranged between the igniter (20) and the discharge port (1 1) and is traversed by the pressure wave generated by the igniter ( 20) and opening the lid (12).
2. Générateur de gaz selon la revendication précédente, caractérisé en ce que la chambre (10) de gaz présente au moins une section intérieure agencée entre l'allumeur (20) et l'orifice de décharge (1 1 ), et en ce que ladite au moins une section intérieure est complètement occupée par ladite au moins une partie du chargement de propergol (30).  2. Gas generator according to the preceding claim, characterized in that the chamber (10) of gas has at least one inner section arranged between the igniter (20) and the discharge port (1 1), and in that said at least one inner section is completely occupied by said at least a portion of the propellant charge (30).
3. Générateur de gaz selon l'une des revendications précédentes, caractérisé en ce que le chargement de propergol (30) est totalement agencé entre l'allumeur (20) et l'orifice de décharge (1 1 ). 3. Gas generator according to one of the preceding claims, characterized in that the propellant charge (30) is completely arranged between the igniter (20) and the discharge port (1 1).
4. Générateur de gaz selon l'une des revendications précédentes, caractérisé en ce que la chambre (10) présente une forme tubulaire et un volume interne, et en ce que le chargement de propergol (30) occupe au moins 70% du volume interne de la chambre (10). 4. Gas generator according to one of the preceding claims, characterized in that the chamber (10) has a tubular shape and an internal volume, and in that the propellant charge (30) occupies at least 70% of the internal volume. of the room (10).
5. Générateur de gaz selon l'une des revendications précédentes, caractérisé en ce qu'il comprend une grille (60) entre le chargement de propergol (30) et l'orifice de décharge (1 1 ), et en ce que la grille (60) est agencée pour retenir le chargement de propergol (30) avant d'être allumé par l'allumeur (20).  5. Gas generator according to one of the preceding claims, characterized in that it comprises a grid (60) between the propellant charge (30) and the discharge orifice (1 1), and in that the gate (60) is arranged to retain the propellant charge (30) before being ignited by the igniter (20).
6. Générateur de gaz selon l'une des revendications précédentes, caractérisé en ce que la chambre (10) présente une forme tubulaire avec un diamètre interne inférieur ou égal à 19 millimètres. 6. Gas generator according to one of the preceding claims, characterized in that the chamber (10) has a tubular shape with an internal diameter less than or equal to 19 millimeters.
7. Générateur de gaz selon l'une des revendications précédentes, caractérisé en ce que les gaz sont stockés dans la chambre (10) de gaz à une pression d'au moins 45MPa.  7. Gas generator according to one of the preceding claims, characterized in that the gases are stored in the chamber (10) of gas at a pressure of at least 45MPa.
8. Générateur de gaz selon l'une des revendications précédentes, caractérisé  8. Gas generator according to one of the preceding claims, characterized
- en ce que l'allumeur (20) comprend au moins une matière pyrotechnique, in that the igniter (20) comprises at least one pyrotechnic substance,
- en ce que le générateur comprend une paroi (21 a) agencée entre ladite au moins une matière pyrotechnique et les gaz sous pression de la chambrein that the generator comprises a wall (21 a) arranged between the at least one pyrotechnic material and the pressurized gases of the chamber
(10) de gaz, (10) gas,
en ce que la paroi (21 a) est agencée pour se rompre à une pression de rupture prédéterminée créée par la dite au moins une matière pyrotechnique, et en ce que la pression de rupture prédéterminée est au moins le double de la pression de stockage des gaz sous pression dans la chambre (10) de gaz. in that the wall (21 a) is arranged to break at a predetermined breaking pressure created by said at least one pyrotechnic material, and in that the predetermined breaking pressure is at least twice the storage pressure of the pressurized gas in the gas chamber (10).
9. Générateur de gaz selon l'une des revendications précédentes, caractérisé en ce que le chargement de propergol (30) est un chargement en vrac.  9. Gas generator according to one of the preceding claims, characterized in that the propellant charge (30) is a bulk load.
10. Module de sécurité automobile comprenant au moins un générateur de gaz selon l'une des revendications précédentes. 10. Automotive safety module comprising at least one gas generator according to one of the preceding claims.
1 1 . Véhicule automobile comprenant au moins un module de sécurité automobile selon la revendication précédente. 1 1. Motor vehicle comprising at least one automotive safety module according to the preceding claim.
12. Procédé de gonflage d'un coussin de sécurité automobile par un générateur de gaz, le générateur de gaz comprenant :  12. Method of inflating an automobile safety cushion by a gas generator, the gas generator comprising:
- une chambre (10) de gaz sous pression stockés à une première température, et comprenant un orifice de décharge (1 1 ) scellé par un opercule (12), a chamber (10) of pressurized gas stored at a first temperature, and comprising a discharge orifice (1 1) sealed by a lid (12),
- un allumeur (20) agencé pour générer une onde de pression dans la chambre (10) de gaz,  an igniter (20) arranged to generate a pressure wave in the gas chamber (10),
- un chargement de propergol (30) agencé au moins dans une partie de la chambre (10) de gaz sous pression, au moins en partie entre l'allumeur (20) et l'orifice de décharge (1 1 ), le chargement de propergol (30) étant agencé pour être allumé par l'allumeur (20) et générer des gaz de combustion à une deuxième température supérieure à la première température, a propellant charge (30) arranged at least in a part of the chamber (10) of pressurized gas, at least partly between the igniter (20) and the discharge orifice (1 1), the loading of propellant (30) being arranged to be ignited by the igniter (20) and generating combustion gases at a second temperature higher than the first temperature,
le procédé comprenant les étapes consistant à : the method comprising the steps of:
- allumer l'allumeur (20),  - turn on the igniter (20),
- générer avec l'allumeur (20) une onde de pression dans la chambre (10) de gaz,  - generating with the igniter (20) a pressure wave in the chamber (10) of gas,
- traverser ladite au moins une partie du chargement de propergol (30) avec l'onde de pression  - passing said at least a portion of the propellant charge (30) with the pressure wave
- ouvrir l'opercule (12) scellant l'orifice de décharge (1 1 ) avec l'onde de pression,  - opening the seal (12) sealing the discharge orifice (1 1) with the pressure wave,
- allumer le chargement de propergol (30)  - turn on the propellant charge (30)
- laisser sortir de la chambre (10) au moins une partie des gaz sous pression à la première température seuls,  - leaving at least a portion of the gases under pressure at the first temperature out of the chamber (10) alone,
- laisser ensuite sortir de la chambre (10) le reste des gaz sous pression à la première température, simultanément avec les gaz de combustion à la deuxième température.  - Then leave the chamber (10) the rest of the pressurized gas at the first temperature, simultaneously with the combustion gases at the second temperature.
PCT/EP2014/060274 2013-05-21 2014-05-20 Gas generator WO2014187790A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR13/01159 2013-05-21
FR1301159A FR3005914B1 (en) 2013-05-21 2013-05-21 GAS GENERATOR

Publications (1)

Publication Number Publication Date
WO2014187790A1 true WO2014187790A1 (en) 2014-11-27

Family

ID=49111270

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/060274 WO2014187790A1 (en) 2013-05-21 2014-05-20 Gas generator

Country Status (2)

Country Link
FR (1) FR3005914B1 (en)
WO (1) WO2014187790A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050189750A1 (en) * 2004-02-02 2005-09-01 Yuzo Gotoh Hybrid inflator
DE102007028806A1 (en) * 2006-06-19 2007-12-27 TK Holdings, Inc., Armada Gas generating system for use in e.g. airbag, has gas generating unit housing operatively connected with pressure container such that container and housing are in fluid communication, and gas in container passes via housing
EP2321156A1 (en) * 2008-09-04 2011-05-18 Autoliv ASP, Inc. Inflator for an airbag
DE102011009309A1 (en) * 2011-01-24 2012-07-26 Trw Airbag Systems Gmbh inflator
DE102011013545A1 (en) * 2011-03-10 2012-09-13 Trw Airbag Systems Gmbh Hybrid gas generator for use in module, particularly for protection device in vehicle, has activation device with igniter unit containing pyrotechnic charge, particularly on basis of hydrides

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050189750A1 (en) * 2004-02-02 2005-09-01 Yuzo Gotoh Hybrid inflator
DE102007028806A1 (en) * 2006-06-19 2007-12-27 TK Holdings, Inc., Armada Gas generating system for use in e.g. airbag, has gas generating unit housing operatively connected with pressure container such that container and housing are in fluid communication, and gas in container passes via housing
EP2321156A1 (en) * 2008-09-04 2011-05-18 Autoliv ASP, Inc. Inflator for an airbag
EP2321156B1 (en) 2008-09-04 2013-03-06 Autoliv ASP, Inc. Inflator for an airbag
DE102011009309A1 (en) * 2011-01-24 2012-07-26 Trw Airbag Systems Gmbh inflator
DE102011013545A1 (en) * 2011-03-10 2012-09-13 Trw Airbag Systems Gmbh Hybrid gas generator for use in module, particularly for protection device in vehicle, has activation device with igniter unit containing pyrotechnic charge, particularly on basis of hydrides

Also Published As

Publication number Publication date
FR3005914B1 (en) 2015-05-29
FR3005914A1 (en) 2014-11-28

Similar Documents

Publication Publication Date Title
EP3301701B1 (en) Pyrotechnical fuse
EP1053915B1 (en) Hybrid gas generator with a perforating stem
EP3479050B1 (en) Gas generator
EP1160138B1 (en) Hybrid gas generator with a perforating stem
FR2759958A1 (en) HYBRID INFLATION DEVICE FOR AIRBAGS
FR2902060A1 (en) "PYROTECHNIC GENERATOR OF GAS USED IN AUTOMOTIVE SAFETY"
FR2959006A1 (en) GENERATOR OF GAS WITH TWO PYROTECHNIC LOADS
FR3067437A1 (en) AXIAL FLUID SPRAY WITH CLAPPER EVENT
EP2406577B1 (en) Gas generator including a non-pyrotechnic energising device
FR3023760A1 (en)
FR2953008A1 (en) REACTIVE GAS GENERATOR
WO2014187790A1 (en) Gas generator
EP0849130B1 (en) Pyrotechnic gas generator with composite loading
FR2964439A1 (en) AUTOMATIC PURGING DEVICE OF A TANK AND TANK COMPRISING SUCH A DEVICE
FR2970690A1 (en) GAS GENERATOR HAVING STORAGE ENCLOSURE OF ENDOTHERMIC STATE MATERIAL.
EP2895726B1 (en) Anaerobic hybrid propulsion device with fuel present in the form of divided solids
FR2951243A1 (en) Safety device for forming pressurized gas releasing valve for emptying pressurized gas i.e. hydrogen gas, from gas storing container i.e. hydrogen gas storing container, has opening blocked by stopper, and body formed with gas flow channel
EP3313536B1 (en) Fire extinguisher
FR3045811A1 (en) GAS GENERATOR
FR2939742A1 (en) HYBRID GAS GENERATOR FOR INFLATION PROTECTION INFLATABLE CUSHION FOR MOTOR VEHICLE
WO2024126513A1 (en) Safety device for a battery of an electric or hybrid vehicle
FR3139074A1 (en) Gas generator comprising propellant under pressure
EP2720104B1 (en) Self-regulating valve assembly with compact geometry
FR3028594A1 (en) DEVICE FOR DISPENSING GAS IN A GAS GENERATOR
FR3134775A1 (en) Gas generator with a pressurized gas reserve

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14725426

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14725426

Country of ref document: EP

Kind code of ref document: A1