FR3129894A1 - Motor vehicle frontal type airbag - Google Patents
Motor vehicle frontal type airbag Download PDFInfo
- Publication number
- FR3129894A1 FR3129894A1 FR2113119A FR2113119A FR3129894A1 FR 3129894 A1 FR3129894 A1 FR 3129894A1 FR 2113119 A FR2113119 A FR 2113119A FR 2113119 A FR2113119 A FR 2113119A FR 3129894 A1 FR3129894 A1 FR 3129894A1
- Authority
- FR
- France
- Prior art keywords
- airbag
- steering wheel
- casing
- housed
- bag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004744 fabric Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 238000009958 sewing Methods 0.000 claims description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
- B60R21/2032—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns the inflator or inflatable member not being rotatable with the steering wheel; Arrangements using the steering column or steering wheel rim for storing, supplying or evacuating the inflation gas or for storing the inflatable member
-
- 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
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
-
- 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
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R2021/23107—Inflatable members characterised by their shape, construction or spatial configuration the bag being integrated in a multi-bag system
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
L’invention concerne un coussin gonflable de sécurité de type frontal (10) pour véhicule automobile, ledit coussin comportant un boîtier (11) prévu pour être logé à l’intérieur du moyeu (5) du volant (3) dudit véhicule, un générateur de gaz (13) logé dans ledit boîtier (11), ainsi qu’un sac gonflable de sécurité (12) logé à l’état replié à l’intérieur dudit boîtier et apte à se déployer à l’arrière dudit volant, ledit coussin comportant en outre un sac gonflable de support (14) logé à l’état replié à l’intérieur dudit boîtier et apte à se déployer, simultanément audit sac gonflable de sécurité (12), au dessus dudit volant, ledit sac gonflable de support (14) étant en outre conformé de sorte à venir, dans sa configuration déployée, au contact de la portion supérieure dudit sac gonflable de sécurité (12) en configuration déployée de sorte à exercer une fonction de contre-appui sur cette portion supérieure. Figure à publier avec l’abrégé : Fig. 3The invention relates to a front-type airbag (10) for a motor vehicle, said airbag comprising a casing (11) intended to be housed inside the hub (5) of the steering wheel (3) of said vehicle, a generator of gas (13) housed in said casing (11), as well as an inflatable safety bag (12) housed in the folded state inside said casing and able to deploy at the rear of said steering wheel, said cushion further comprising an inflatable support bag (14) housed in the folded state inside said casing and able to deploy, simultaneously with said airbag (12), above said steering wheel, said inflatable support bag ( 14) being further shaped so as to come, in its deployed configuration, into contact with the upper portion of said airbag (12) in the deployed configuration so as to exert a counter-support function on this upper portion. Figure to be published with abstract: Fig. 3
Description
L'invention concerne d’une manière générale les coussins gonflables de sécurité communément désignés sous la dénomination anglaise « airbag ».The invention generally relates to airbags commonly referred to as "airbag".
Elle vise en particulier un tel coussin gonflable de sécurité destiné à être monté dans le moyeu du volant de direction d’un véhicule automobile et configuré pour se déployer en cas de collision frontale pour protéger le conducteur de ce véhicule.It relates in particular to such an airbag intended to be mounted in the hub of the steering wheel of a motor vehicle and configured to deploy in the event of a frontal collision to protect the driver of this vehicle.
Les véhicules automobiles comportent classiquement un volant de direction manœuvré par le conducteur et qui est fixé au sommet d'une colonne de direction pour exercer dessus une rotation transmise à un boîtier de direction situé à son extrémité inférieure, ce boîtier appliquant sur les deux roues avant un angle de braquage pour assurer la direction du véhicule.Motor vehicles conventionally comprise a steering wheel operated by the driver and which is fixed to the top of a steering column to exert a rotation thereon transmitted to a steering box located at its lower end, this box applying to the two front wheels a steering angle to steer the vehicle.
Le volant de direction comporte généralement dans son moyeu central en forme de cuvette, un coussin gonflable de sécurité de type frontal.The steering wheel generally comprises in its central hub in the shape of a bowl, a front-type airbag.
Un tel coussin gonflable de sécurité comprend classiquement un boîtier, un générateur de gaz logé dans ledit boîtier et actionnable via un calculateur électronique relié à des capteurs de détection des chocs subis par le véhicule, ainsi qu’un sac gonflable de sécurité logé à l’état replié à l’intérieur dudit boîtier et relié fluidiquement audit générateur de gaz.Such an airbag conventionally comprises a casing, a gas generator housed in said casing and operable via an electronic computer connected to sensors for detecting impacts suffered by the vehicle, as well as an air bag housed in the folded state inside said housing and fluidly connected to said gas generator.
En cas de choc avant violent notamment lors d’un accident, le sac est brutalement mis sous pression par le générateur de gaz et se déploie en arrière du volant dans l’habitacle du véhicule pour amortir le choc et protéger le buste du conducteur dont en particulier sa tête.In the event of a violent front impact, particularly during an accident, the bag is suddenly pressurized by the gas generator and deploys behind the steering wheel in the passenger compartment of the vehicle to cushion the impact and protect the driver's chest, especially his head.
Il est à noter que le contre-appui exercé par le volant sur le sac déployé au moment de l’impact avec le buste du conducteur permet d’éviter l’avancée de ce sac vers le pare-brise et participe donc grandement à l’amortissement du choc.It should be noted that the counter-pressure exerted by the steering wheel on the deployed bag at the moment of impact with the driver's chest prevents the bag from moving towards the windscreen and therefore contributes greatly to the shock absorption.
Pour des raisons de style, certains véhicules automobiles sont dotés d’un volant de direction présentant une jante de préhension et d'entraînement de petit diamètre ou dépourvue de branche supérieure, ce qui empêche ce dernier d’exercer un contre-appui sur une partie du sac gonflable en configuration déployée et notamment sa portion supérieure destinée à recevoir la tête du conducteur.For reasons of style, certain motor vehicles are fitted with a steering wheel having a gripping and driving rim of small diameter or devoid of an upper branch, which prevents the latter from exerting a counter-support on a part of the airbag in the deployed configuration and in particular its upper portion intended to receive the driver's head.
Cette instabilité de la portion supérieure du sac gonflable en configuration déployée engendre ainsi une perte d’amortissement au niveau de la tête se traduisant par une augmentation sensible du risque de blessures pour le conducteur.This instability of the upper portion of the air bag in the deployed configuration thus generates a loss of damping at head level, resulting in a significant increase in the risk of injury to the driver.
Afin de palier à cette problématique, le document brevet US 2019/0161044 A1 propose d’adjoindre au coussin gonflable de sécurité implanté dans le moyeu du volant, un second coussin gonflable de support implanté dans la colonne de direction du véhicule et comprenant un sac gonflable configuré pour se déployer vers le haut et vers l’arrière jusqu’à entrer en contact avec la portion supérieure du sac gonflable du coussin gonflable de sécurité.In order to overcome this problem, the patent document US 2019/0161044 A1 proposes to add to the airbag installed in the steering wheel hub, a second support airbag installed in the steering column of the vehicle and comprising an inflatable bag configured to inflate upward and rearward until contacting the upper portion of the airbag of the airbag.
Le sac gonflable de ce second coussin gonflable de support permet ainsi d’exercer un contre-appui sur la portion supérieure du sac gonflable du coussin gonflable de sécurité, de sorte à assurer une protection plus efficace de la tête du conducteur du véhicule.The airbag of this second support airbag thus makes it possible to exert a counter-support on the upper portion of the airbag of the safety airbag, so as to provide more effective protection for the head of the driver of the vehicle.
L’adjonction d’un tel coussin gonflable de support entraine malheureusement une augmentation sensible du coût de revient du véhicule.The addition of such a support airbag unfortunately leads to a significant increase in the cost price of the vehicle.
Par ailleurs, l’implantation d’un tel second coussin gonflable de support n’est pas envisageable dans les véhicules dotés d’une colonne de direction rétractable en cas d’exercice contre le volant d’une pression supérieure à un seuil prédéterminé.Furthermore, the installation of such a second support airbag cannot be envisaged in vehicles equipped with a retractable steering column in the event of exertion against the steering wheel of a pressure greater than a predetermined threshold.
Un tel mouvement de rétractation de la colonne de direction entrainerait en effet un pincement du sac gonflable de ce coussin de support pouvant provoquer son déchirement et/ou perturber la poursuite de la rétractation de cette colonne de direction.Such a movement of retraction of the steering column would cause the air bag of this support cushion to be pinched, which could cause it to tear and/or disrupt the continued retraction of this steering column.
La présente invention vise donc à améliorer la situation.The present invention therefore aims to improve the situation.
Elle propose à cet effet un coussin gonflable de sécurité de type frontal pour véhicule automobile, ledit coussin comportant un boîtier prévu pour être logé à l’intérieur du moyeu du volant dudit véhicule, un générateur de gaz logé dans ledit boîtier, ainsi qu’un sac gonflable de sécurité logé à l’état replié à l’intérieur dudit boîtier et relié fluidiquement audit générateur de gaz, ledit sac gonflable de sécurité étant apte à se déployer à l’arrière dudit volant en traversant ledit boîtier au niveau d’une première ouverture de sortie ménagée sur sa face arrière ;
caractérisé en ce qu’il comporte en outre un sac gonflable de support logé à l’état replié à l’intérieur dudit boîtier et relié fluidiquement audit générateur de gaz, ledit sac gonflable de support étant apte à se déployer, simultanément audit sac gonflable de sécurité, au dessus dudit volant en traversant ledit boîtier au niveau d’une seconde ouverture de sortie ménagée sur sa face supérieure, ledit sac gonflable de support étant en outre conformé de sorte à venir, dans sa configuration déployée, au contact de la portion supérieure dudit sac gonflable de sécurité en configuration déployée de sorte à exercer une fonction de contre-appui sur cette portion supérieure.To this end, it proposes a frontal-type airbag for a motor vehicle, said airbag comprising a casing intended to be housed inside the hub of the steering wheel of said vehicle, a gas generator housed in said casing, as well as a airbag housed in the folded state inside said casing and fluidly connected to said gas generator, said airbag being able to deploy at the rear of said steering wheel by crossing said casing at the level of a first outlet opening provided on its rear face;
characterized in that it further comprises an inflatable support bag housed in the folded state inside said casing and fluidly connected to said gas generator, said inflatable support bag being able to deploy, simultaneously with said inflatable security, above said steering wheel by crossing said housing at the level of a second outlet opening formed on its upper face, said support airbag being furthermore shaped so as to come, in its deployed configuration, into contact with the upper portion said airbag in the deployed configuration so as to exert a counter-support function on this upper portion.
Le coussin gonflable de sécurité selon l’invention permet ainsi d’assurer une protection plus efficace de la tête du conducteur pour des véhicules dotés d’un volant présentant une jante de préhension et d’entrainement de petit diamètre ou dépourvue de branche supérieure.The airbag according to the invention thus makes it possible to provide more effective protection of the driver's head for vehicles equipped with a steering wheel having a gripping and driving rim of small diameter or devoid of an upper branch.
D’un surcoût raisonnable vis-à-vis d’un coussin gonflable frontal classique puisque ne nécessitant pas l’adjonction d’un générateur supplémentaire, le coussin gonflable selon l’invention présente en outre l’avantage de pouvoir être implanté dans des véhicules dotés d’une colonne de direction rétractable.At a reasonable additional cost compared to a conventional frontal airbag since it does not require the addition of an additional generator, the airbag according to the invention also has the advantage of being able to be installed in vehicles equipped with a retractable steering column.
Selon des caractéristiques préférées dudit coussin gonflable de sécurité selon l’invention :
- ledit sac gonflable de support est également conformé de sorte à venir, dans sa configuration déployée, prendre appui sur le dessus du moyeu dudit volant ;
- ledit sac gonflable de support est conformé pour présenter, dans sa configuration déployée, une forme de botte comprenant un jambage prévu pour reposer contre la portion supérieure dudit sac gonflable de sécurité, ainsi qu’un pied saillant à l’avant dudit jambage et prévu pour prendre appui sur le dessus du moyeu dudit volant mais également sur au moins une portion du dessus de la colonne de direction dudit véhicule ;
- ledit sac gonflable de support comprend une pièce de tissu centrale annulaire sur les bords périphériques de laquelle sont rapportées par couture deux pièces de tissu latérales de sorte à présenter, dans sa configuration déployée, une section transversale sensiblement constante sur l’ensemble de sa largeur ;
- ledit sac gonflable de support est conformé de sorte à venir, dans sa configuration déployée, prendre appui contre le pare-brise dudit véhicule ;
- ledit coussin gonflable comporte également un organe de guidage monté fixement à l’intérieur dudit boîtier au niveau de son coin supérieur arrière et formant une rampe s’étendant en biais entre les première et seconde ouvertures de sorties de sorte à guider le déploiement desdits sacs gonflables hors de ce boîtier ;
- ledit organe de guidage est réalisé dans un matériau composite ou dans une mousse de polypropylène présentant une densité supérieure ou égale à 60 kg/m3; et/ou
- ledit sac gonflable de sécurité et ledit sac gonflable de support sont dotés chacun d’au moins un orifice de gonflage respectif relié fluidiquement à la sortie dudit générateur de gaz par une conduite correspondante.
L’invention vise également sous un second aspect un volant de direction pour véhicule automobile comportant une jante de préhension et d’entrainement ainsi qu’un moyeu creux solidaire de ladite jante, caractérisé en ce qu’il comporte également un tel coussin gonflable de sécurité logé dans ledit moyeu.According to preferred characteristics of said airbag according to the invention:
- Said inflatable support bag is also shaped so as to come, in its deployed configuration, to rest on the top of the hub of said steering wheel;
- said support airbag is shaped to present, in its deployed configuration, a boot shape comprising a leg provided to rest against the upper portion of said safety airbag, as well as a foot projecting at the front of said leg and provided to bear on the top of the hub of said steering wheel but also on at least a portion of the top of the steering column of said vehicle;
- said inflatable support bag comprises an annular central piece of fabric on the peripheral edges of which are attached by sewing two side pieces of fabric so as to present, in its deployed configuration, a substantially constant cross section over its entire width ;
- Said airbag support is shaped so as to come, in its deployed configuration, bear against the windshield of said vehicle;
- said airbag also comprises a guide member fixedly mounted inside said casing at its upper rear corner and forming a ramp extending obliquely between the first and second outlet openings so as to guide the deployment of said bags inflatable out of this case;
- Said guide member is made of a composite material or of a polypropylene foam having a density greater than or equal to 60 kg/m 3 ; and or
- Said safety airbag and said support airbag are each provided with at least one respective inflation orifice fluidically connected to the outlet of said gas generator by a corresponding pipe.
The invention also relates, in a second aspect, to a steering wheel for a motor vehicle comprising a rim for gripping and driving as well as a hollow hub integral with said rim, characterized in that it also comprises such an airbag housed in said hub.
L’invention vise enfin sous un troisième aspect un véhicule automobile, caractérisé en ce qu’il comporte un tel volant de direction.The invention finally relates in a third aspect to a motor vehicle, characterized in that it comprises such a steering wheel.
L’exposé de l’invention sera maintenant poursuivi par la description détaillée d’un exemple de réalisation, donnée ci-après à titre illustratif mais non limitatif, en référence aux dessins annexés, sur lesquels :The description of the invention will now be continued with the detailed description of an embodiment, given below by way of illustration but not limitation, with reference to the appended drawings, in which:
Claims (10)
caractérisé en ce qu’il comporte en outre un sac gonflable de support (14) logé à l’état replié à l’intérieur dudit boîtier (11) et relié fluidiquement audit générateur de gaz (13), ledit sac gonflable de support (14) étant apte à se déployer, simultanément audit sac gonflable de sécurité (12), au dessus dudit volant (3) en traversant ledit boîtier (11) au niveau d’une seconde ouverture de sortie (16) ménagée sur sa face supérieure, ledit sac gonflable de support (14) étant en outre conformé de sorte à venir, dans sa configuration déployée, au contact de la portion supérieure dudit sac gonflable de sécurité (12) en configuration déployée de sorte à exercer une fonction de contre-appui sur cette portion supérieure.Front-type airbag (10) for a motor vehicle, said airbag (10) comprising a casing (11) intended to be housed inside the hub (5) of the steering wheel (3) of said vehicle, a gas generator (13) housed in said casing (11), as well as an airbag (12) housed in the folded state inside said casing (11) and fluidly connected to said gas generator (13), said bag safety inflatable (12) being able to deploy at the rear of said steering wheel (3) passing through said casing (11) at the level of a first outlet opening (15) provided on its rear face;
characterized in that it further comprises an inflatable support bag (14) housed in the folded state inside said housing (11) and fluidly connected to said gas generator (13), said inflatable support bag (14 ) being able to deploy, simultaneously with said airbag (12), above said steering wheel (3) passing through said housing (11) at the level of a second outlet opening (16) provided on its upper face, said support airbag (14) being further shaped so as to come, in its deployed configuration, into contact with the upper portion of said safety airbag (12) in the deployed configuration so as to exert a function of counter-support on this upper portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2113119A FR3129894A1 (en) | 2021-12-08 | 2021-12-08 | Motor vehicle frontal type airbag |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2113119A FR3129894A1 (en) | 2021-12-08 | 2021-12-08 | Motor vehicle frontal type airbag |
| FR2113119 | 2021-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR3129894A1 true FR3129894A1 (en) | 2023-06-09 |
Family
ID=80999987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR2113119A Pending FR3129894A1 (en) | 2021-12-08 | 2021-12-08 | Motor vehicle frontal type airbag |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR3129894A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001021450A1 (en) * | 1999-09-17 | 2001-03-29 | Volkswagen Aktiengesellschaft | Airbag system in a steering wheel of a motor vehicle |
| DE202006001826U1 (en) * | 2006-02-02 | 2006-05-18 | Takata-Petri Ag | Safety device for use in motor vehicle, has air bag arrangement whose gas bag is unfoldable outside around steering wheel between the steering wheel and instrument panel and/or another body panel |
| US20190161044A1 (en) | 2017-11-27 | 2019-05-30 | Autoliv Asp, Inc. | Frontal airbag systems and uses thereof |
| DE102018131197A1 (en) * | 2018-12-06 | 2020-06-10 | Joyson Safety Systems Germany Gmbh | Steering device for a motor vehicle |
| US20210300280A1 (en) * | 2020-03-30 | 2021-09-30 | Ford Global Technologies, Llc | Airbag extending annularly around rotational axis of steering wheel |
-
2021
- 2021-12-08 FR FR2113119A patent/FR3129894A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001021450A1 (en) * | 1999-09-17 | 2001-03-29 | Volkswagen Aktiengesellschaft | Airbag system in a steering wheel of a motor vehicle |
| DE202006001826U1 (en) * | 2006-02-02 | 2006-05-18 | Takata-Petri Ag | Safety device for use in motor vehicle, has air bag arrangement whose gas bag is unfoldable outside around steering wheel between the steering wheel and instrument panel and/or another body panel |
| US20190161044A1 (en) | 2017-11-27 | 2019-05-30 | Autoliv Asp, Inc. | Frontal airbag systems and uses thereof |
| DE102018131197A1 (en) * | 2018-12-06 | 2020-06-10 | Joyson Safety Systems Germany Gmbh | Steering device for a motor vehicle |
| US20210300280A1 (en) * | 2020-03-30 | 2021-09-30 | Ford Global Technologies, Llc | Airbag extending annularly around rotational axis of steering wheel |
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Owner name: STELLANTIS AUTO SAS, FR Effective date: 20240423 |