US20010011813A1 - Gas bag restraint system - Google Patents

Gas bag restraint system Download PDF

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Publication number
US20010011813A1
US20010011813A1 US09/281,492 US28149299A US2001011813A1 US 20010011813 A1 US20010011813 A1 US 20010011813A1 US 28149299 A US28149299 A US 28149299A US 2001011813 A1 US2001011813 A1 US 2001011813A1
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US
United States
Prior art keywords
gas bag
restraint system
vehicle
tensioning means
column
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US09/281,492
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US6375217B2 (en
Inventor
Anton Fischer
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 Occupant Restraint Systems GmbH
Original Assignee
TRW Occupant Restraint Systems GmbH
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Filing date
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Assigned to TRW OCCUPANT RESTRAINT SYSTEMS GMBH & CO. KG reassignment TRW OCCUPANT RESTRAINT SYSTEMS GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FISCHER, ANTON
Publication of US20010011813A1 publication Critical patent/US20010011813A1/en
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    • 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
    • B60R21/232—Curtain-type airbags deploying mainly in a vertical direction from their top edge
    • 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
    • B60R21/261—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 with means other than bag structure to diffuse or guide inflation fluid
    • B60R2021/2612—Gas guiding means, e.g. ducts
    • B60R2021/2617—Curtain bag nozzles
    • 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
    • B60R21/06—Safety nets, transparent sheets, curtains, or the like, e.g. between occupants and glass
    • B60R21/08—Safety nets, transparent sheets, curtains, or the like, e.g. between occupants and glass automatically movable from an inoperative to an operative position, e.g. in a collision

Definitions

  • the invention relates to a gas bag restraint system for an occupant of a vehicle.
  • U.S. Pat. No. 5,322,322 shows a restraint system which is constructed as a head gas bag.
  • the head gas bag is tube-shaped and extends in the inflated state from the A-column obliquely upwards to beyond the B-column.
  • This gas bag only covers a relatively small portion of the side window of the front occupant.
  • a net arranged on the upper edge of the gas bag can only serve as an additional small restraining surface.
  • the tensioning force applied to the net by the always linearly extending gas bag is probably low, this being the reason why the net can not absorb any higher lateral forces without yielding greatly.
  • louver-like gas bags which extend from the A-column up to the C-column and are intended to offer protection laterally equally to the front and rear occupants, i.e. from the side window of the front to the side window of the rear occupants.
  • the production of these gas bags, which cover a large area, is relatively expensive.
  • a tube carrying gas extends along the roof frame, via which tube the gas is to flow as uniformly as possible into the gas bag.
  • the gas volume for inflating this curtain-like gas bag is relatively great, so that extremely powerful gas generators have to be provided, which ensure a sufficiently quick filling.
  • the invention provides a gas bag restraint system which is simply constructed, is able to be manufactured at a favorable cost and requires a relatively low gas volume despite a very large available restraining surface.
  • the gas bag restraint system according to the invention furthermore distinguishes itself by a great force applied to the tensioning means and giving the tensioning means a stable position.
  • the gas bag restraint system for an occupant of a vehicle according to the present invention comprises a tube-shaped gas bag with a longitudinal axis, which endeavours to extend in a straight line in an inflated state of the gas bag and which has an outer wall.
  • the system further comprises at least one tensioning means arranged on the outer wall, by which tensioning means the gas bag is fastened to the vehicle.
  • the tensioning means is designed with a large area and is arranged at such points of the outer wall and on the vehicle that the longitudinal axis of the tube-shaped gas bag extends in a curved shape in its inflated state.
  • the tensioning means is tensioned by the curved gas bag and forms an additional restraining surface.
  • the tube-shaped gas bag is, therefore, not tensioned between its two axial ends and able to extend linearly between these axial ends, rather, quite on the contrary, it is forced by the tensioning means to assume a curved profile, something which results in a high tensioning force.
  • the gas bag braces itself between the tensioning means or the sets of tensioning means and is fixed in position.
  • the tube can above all be curved such that, by itself or together with the tensioning means, it shields regions which can not be covered by a gas bag which extends exclusively linearly, with the result that the gas bag, despite its small volume, can cover those regions of the vehicle which are likely to cause injury (the B-column or the side window on a level with the head).
  • the tensioning means can be a piece of fabric covering a large area, or a net, on which the gas bag is arrested at several points.
  • the gas bag can extend for example through slits in the piece of fabric.
  • the gas bag restraint system according to the invention is preferably a side impact restraint system and extends in front of one or more side windows.
  • the gas bag is in particular a fabric tube manufactured so as to be seamless, preferably even endless, which is deflected by the tensioning means by more than 30°, preferably more than 60°.
  • FIG. 1 shows a side view of an unfolded gas bag restraint system according to the invention, which is constructed as a side impact restraint system
  • FIG. 2 shows a side view of the unfolded tensioning means according to FIG. 1, without the gas bag arranged thereon, and
  • FIG. 3 shows the inflated gas bag which is shown in FIG. 1, not fastened to the tensioning means.
  • FIG. 1 a gas bag restraint system, more precisely a side impact restraint system, is shown in the unfolded state.
  • the restraint system consists of a tube-shaped, seamlessly and endlessly manufactured gas bag 3 , which is also to be seen in FIG. 3.
  • the geometry and the type of weave of the outer wall 5 of the gas bag are selected such that, without being fastened to a part on its outer wall 5 , it endeavours to extend in a straight line in the inflated state, as FIG. 3 shows.
  • the gas bag 3 is fastened to a tensioning means 7 in the form of a shown fabric piece having a large area or a partly shown net 7 ′.
  • the fabric piece has numerous slits 9 through which the gas bag 3 is drawn.
  • the gas bag is sewn by its outer wall to the bridge 11 , each formed by a pair of parallel slits.
  • the tensioning means 7 is adapted in its size and shape to the entire side window region of the vehicle into which it is incorporated. It extends in the unfolded state according to FIG. 1 approximately up to the lower end 13 of the side windows and up to the roof frame 15 . In this region, the vehicle is illustrated by dot-and-dash lines.
  • the tensioning means 7 extends from the A-column 17 over the B-column 19 up to the C-column 21 , so that it offers protection to both the front and rear occupants.
  • the tensioning means 7 is fastened at a few points to the A-column 17 , the roof frame 15 and the C-column 21 .
  • the gas bag 3 is fastened to the tensioning means 7 such that it can not extend in a straight line, but rather must assume a curved profile.
  • the gas bag 3 is curved in the region 50 by more than 60°, namely, about 110° as compared to the linear gas bag illustrated by dot-and-dash lines. Then the gas bag 3 extends slightly obliquely downwards, to finally extend more sharply upwards towards its rear end, where it partially covers the C-column. At its highest point in the unfolded state, the gas bag has an opening 23 which serves as inflation opening. Via this opening 23 the gas of an adjacent gas generator 25 flows into the gas bag 3 .
  • the tensioning means 7 is braced between the fastening points on the vehicle and covers the entire side window region together with the gas bag 3 , like a safety cloth.
  • the unfolding of the gas bag 3 takes place very quickly, because it has a relatively small volume.
  • a gas supply pipe is not necessary.
  • As the tube is manufactured endless and without a longitudinal seam, it is very stable and can withstand high opening pressures.
  • the tube is coated on the inside and, because it has no seam, is very gas-tight.
  • the tensioning means 7 covering a large area, does not require any coating and can be of a relatively moderately-priced fabric.
  • the gas bag 3 is guided in particular along those zones of the rear side window region with which the head of the rear occupant could most probably come into contact.

Abstract

A gas bag restraint system for an occupant of a vehicle comprises a tube-shaped gas bag with a longitudinal axis, which endeavours to extend in a straight line in an inflated state of the gas bag and which has an outer wall. The system further comprises at least one tensioning means arranged on the outer wall, by which tensioning means the gas bag is fastened to the vehicle. The tensioning means is designed with a large area and is arranged at such points of the outer wall and on the vehicle that the longitudinal axis of the tube-shaped gas bag extends in a curved shape in its inflated state. The tensioning means is tensioned by the curved gas bag and forms an additional restraining surface.

Description

    TECHNICAL FIELD
  • The invention relates to a gas bag restraint system for an occupant of a vehicle. [0001]
    • BACKGROUND OF THE INVENTION
  • U.S. Pat. No. 5,322,322 shows a restraint system which is constructed as a head gas bag. The head gas bag is tube-shaped and extends in the inflated state from the A-column obliquely upwards to beyond the B-column. This gas bag, however, only covers a relatively small portion of the side window of the front occupant. A net arranged on the upper edge of the gas bag can only serve as an additional small restraining surface. In addition, the tensioning force applied to the net by the always linearly extending gas bag is probably low, this being the reason why the net can not absorb any higher lateral forces without yielding greatly. [0002]
  • Furthermore, it is known to provide louver-like gas bags which extend from the A-column up to the C-column and are intended to offer protection laterally equally to the front and rear occupants, i.e. from the side window of the front to the side window of the rear occupants. The production of these gas bags, which cover a large area, is relatively expensive. In addition, a tube carrying gas extends along the roof frame, via which tube the gas is to flow as uniformly as possible into the gas bag. The gas volume for inflating this curtain-like gas bag is relatively great, so that extremely powerful gas generators have to be provided, which ensure a sufficiently quick filling. [0003]
    • BRIEF SUMMARY OF THE INVENTION
  • The invention provides a gas bag restraint system which is simply constructed, is able to be manufactured at a favorable cost and requires a relatively low gas volume despite a very large available restraining surface. The gas bag restraint system according to the invention furthermore distinguishes itself by a great force applied to the tensioning means and giving the tensioning means a stable position. The gas bag restraint system for an occupant of a vehicle according to the present invention comprises a tube-shaped gas bag with a longitudinal axis, which endeavours to extend in a straight line in an inflated state of the gas bag and which has an outer wall. The system further comprises at least one tensioning means arranged on the outer wall, by which tensioning means the gas bag is fastened to the vehicle. The tensioning means is designed with a large area and is arranged at such points of the outer wall and on the vehicle that the longitudinal axis of the tube-shaped gas bag extends in a curved shape in its inflated state. The tensioning means is tensioned by the curved gas bag and forms an additional restraining surface. The tube-shaped gas bag is, therefore, not tensioned between its two axial ends and able to extend linearly between these axial ends, rather, quite on the contrary, it is forced by the tensioning means to assume a curved profile, something which results in a high tensioning force. Thereby, the gas bag braces itself between the tensioning means or the sets of tensioning means and is fixed in position. The tube can above all be curved such that, by itself or together with the tensioning means, it shields regions which can not be covered by a gas bag which extends exclusively linearly, with the result that the gas bag, despite its small volume, can cover those regions of the vehicle which are likely to cause injury (the B-column or the side window on a level with the head). [0004]
  • The tensioning means can be a piece of fabric covering a large area, or a net, on which the gas bag is arrested at several points. For arresting, the gas bag can extend for example through slits in the piece of fabric. [0005]
  • The gas bag restraint system according to the invention is preferably a side impact restraint system and extends in front of one or more side windows. [0006]
  • The gas bag is in particular a fabric tube manufactured so as to be seamless, preferably even endless, which is deflected by the tensioning means by more than 30°, preferably more than 60°. [0007]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows a side view of an unfolded gas bag restraint system according to the invention, which is constructed as a side impact restraint system, [0008]
  • FIG. 2 shows a side view of the unfolded tensioning means according to FIG. 1, without the gas bag arranged thereon, and [0009]
  • FIG. 3 shows the inflated gas bag which is shown in FIG. 1, not fastened to the tensioning means. [0010]
    • DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
  • In FIG. 1 a gas bag restraint system, more precisely a side impact restraint system, is shown in the unfolded state. The restraint system consists of a tube-shaped, seamlessly and endlessly manufactured [0011] gas bag 3, which is also to be seen in FIG. 3. The geometry and the type of weave of the outer wall 5 of the gas bag are selected such that, without being fastened to a part on its outer wall 5, it endeavours to extend in a straight line in the inflated state, as FIG. 3 shows.
  • The [0012] gas bag 3 is fastened to a tensioning means 7 in the form of a shown fabric piece having a large area or a partly shown net 7′. For this, the fabric piece has numerous slits 9 through which the gas bag 3 is drawn. In addition, the gas bag is sewn by its outer wall to the bridge 11, each formed by a pair of parallel slits. The tensioning means 7 is adapted in its size and shape to the entire side window region of the vehicle into which it is incorporated. It extends in the unfolded state according to FIG. 1 approximately up to the lower end 13 of the side windows and up to the roof frame 15. In this region, the vehicle is illustrated by dot-and-dash lines. In addition, the tensioning means 7 extends from the A-column 17 over the B-column 19 up to the C-column 21, so that it offers protection to both the front and rear occupants. The tensioning means 7 is fastened at a few points to the A-column 17, the roof frame 15 and the C-column 21. The gas bag 3 is fastened to the tensioning means 7 such that it can not extend in a straight line, but rather must assume a curved profile. In the region of its front end which is closest to the A-column 17, it extends sharply downwards, then extends sharply upwards, in order to cover the large part of the B-column 19 and to protect the head of the occupant from a direct contact with the B-column, especially from contact with the seat belt deflection member affixed to the B-column. The result of this is a portion 50 curved in the shape of a U or a V, which portion is arranged such that the gas bag 3 tensions the tensioning means both in the longitudinal direction of the vehicle and also in the vertical direction. The gas bag 3 is curved in the region 50 by more than 60°, namely, about 110° as compared to the linear gas bag illustrated by dot-and-dash lines. Then the gas bag 3 extends slightly obliquely downwards, to finally extend more sharply upwards towards its rear end, where it partially covers the C-column. At its highest point in the unfolded state, the gas bag has an opening 23 which serves as inflation opening. Via this opening 23 the gas of an adjacent gas generator 25 flows into the gas bag 3.
  • The mode of operation of the gas bag restraint system according to the invention is explained below. In the folded state, [0013] gas bag 3 together with tensioning means 7 are hidden under a paneling which extends from the A-column 17 over the roof frame 15 up to the C-column 21. In the case of a side impact, the gas generator 25 inflates the gas bag 3. The covering is opened by the unfolding gas bag 3. The gas bag 3 shifts downwards and in so doing carries the tensioning means 7 with it. The gas bag 3 endeavours to unfold linearly which, however, it can not because of its fastening to the tensioning means 7. Thereby, a tensioning force is produced, so that the tensioning means 7 is braced between the fastening points on the vehicle and covers the entire side window region together with the gas bag 3, like a safety cloth. The unfolding of the gas bag 3 takes place very quickly, because it has a relatively small volume. A gas supply pipe is not necessary. As the tube is manufactured endless and without a longitudinal seam, it is very stable and can withstand high opening pressures. The tube is coated on the inside and, because it has no seam, is very gas-tight. The tensioning means 7, covering a large area, does not require any coating and can be of a relatively moderately-priced fabric. The gas bag 3 is guided in particular along those zones of the rear side window region with which the head of the rear occupant could most probably come into contact.

Claims (14)

1. A gas bag restraint system for an occupant of a vehicle, said system
comprising a tube-shaped gas bag with a longitudinal axis, which endeavours to extend in a straight line in an inflated state of said gas bag and which has an outer wall, and
comprising at least one tensioning means arranged on said outer wall, by which said gas bag is fastened to said vehicle,
said tensioning means being designed with a large area and being arranged at such points of said outer wall and on said vehicle that the longitudinal axis of said tube-shaped gas bag extends in a curved shape in its inflated state, and
said tensioning means being tensioned by said curved gas bag and forms an additional restraining surface.
2. The gas bag restraint system according to
claim 1
, wherein said tensioning means is one of a fabric piece and a net, on which fabric piece or net said gas bag is arrested at several points.
3. The gas bag restraint system according to
claim 2
, wherein said tensioning means has slits which form said points for arresting of said gas bag, and wherein said gas bag extends through said slits in said tensioning means.
4. The gas bag restraint system according to
claim 1
, wherein it is constructed as a side impact restraint system and extends in said inflated state in front of a side window or side windows of said vehicle.
5. The gas bag restraint system according to
claim 4
, wherein said gas bag, in its inflated state, extends from at least laterally of the head of a front occupant to at least laterally of the head of a rear occupant.
6. The gas bag restraint system according to
claim 5
, wherein said tensioning means covers a side window region of said vehicle from close to a roof frame of said vehicle to close to a lower end of said side window and from close to a A-column of said vehicle to a C-column of said vehicle.
7. The gas bag restraint system according to
claim 4
, wherein said gas bag covers a part of a B-column of said vehicle on a level with the head of said occupant.
8. The gas bag restraint system according to
claim 4
, wherein said gas bag extends substantially vertically in a region of a B-column of said vehicle and covers a large part of said B-column.
9. The gas bag restraint system according to
claim 4
, wherein said gas bag covers a large part of a C-column of said vehicle.
10. The gas bag restraint system according to
claim 4
, wherein said gas bag, in its inflated state, extends obliquely downwards or obliquely upwards in a region between a B-column and a C-column of said vehicle.
11. The gas bag restraint system according to
claim 1
, wherein said gas bag is a seamlessly manufactured fabric tube.
12. The gas bag restraint system according to
claim 5
, wherein said gas bag has at least one portion curved in the shape of a U or a V.
13. The gas bag restraint system according to
claim 12
, wherein said gas bag extends in a shape curved by more than about 30° as compared to said gas bag when not curved.
14. The gas bag restraint system according to
claim 12
, wherein said gas bag is curved such that it tensions said tensioning means both in a longitudinal direction of the vehicle and also in the vertical direction.
US09/281,492 1998-04-02 1999-03-30 Gas bag restraint system Expired - Fee Related US6375217B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29806081U DE29806081U1 (en) 1998-04-02 1998-04-02 Airbag restraint system
DE29806081U 1998-04-02
DE29806081.7 1998-04-02

Publications (2)

Publication Number Publication Date
US20010011813A1 true US20010011813A1 (en) 2001-08-09
US6375217B2 US6375217B2 (en) 2002-04-23

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Family Applications (1)

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US09/281,492 Expired - Fee Related US6375217B2 (en) 1998-04-02 1999-03-30 Gas bag restraint system

Country Status (4)

Country Link
US (1) US6375217B2 (en)
EP (1) EP0947393A1 (en)
JP (1) JPH11321505A (en)
DE (1) DE29806081U1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3589030B2 (en) * 1998-06-19 2004-11-17 トヨタ自動車株式会社 Head protection airbag device for front and rear seats
JP2006069280A (en) * 2004-08-31 2006-03-16 Takata Corp Occupant crash protection device
EP2905185B1 (en) * 2014-02-06 2018-03-14 Autoliv Development AB Motor vehicle with an airbag between a wheel and the car body and airbag unit

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT981219B (en) * 1973-03-08 1974-10-10 Alfa Romeo Spa HEAD PROTECTION DEVICE FOR PASSENGERS OF MOTOR VEHICLES COLI IN THE EVENT OF AN IMPACT
DE4137749A1 (en) 1991-11-15 1993-05-19 Kolbenschmidt Ag SAFETY DEVICE
DE4232658A1 (en) 1992-09-29 1994-03-31 Trw Repa Gmbh Inflatable gas bag for a restraint system in vehicles
US5322322A (en) * 1993-02-19 1994-06-21 Simula Inc. Side impact head strike protection system
GB2333075B (en) * 1995-02-20 1999-08-25 Autoliv Dev Improvements in or relating to a safety device
US5588672A (en) * 1995-10-20 1996-12-31 Takata, Inc. Side impact head restraint with inflatable deployment
DE29517373U1 (en) * 1995-11-02 1996-03-07 Trw Repa Gmbh Airbag side impact protection device for vehicle occupants
JP3085170B2 (en) * 1995-12-11 2000-09-04 トヨタ自動車株式会社 Airbag device
DE19605620B4 (en) * 1996-02-15 2004-07-22 Siemens Restraint Systems Gmbh Side airbag module and gas bag to relieve the thoracic area
DE29605896U1 (en) * 1996-03-29 1996-07-25 Trw Repa Gmbh Side impact protection device for vehicle occupants
DE19628108C1 (en) 1996-07-12 1997-06-19 Daimler Benz Ag Impact protection in motor vehicle
GB9619613D0 (en) * 1996-09-19 1996-10-30 Breed Automotive Tech An inflatable restraint for a vehicle
DE19639617A1 (en) * 1996-09-26 1998-04-16 Hs Tech & Design Airbag unit for estate and caravan cars

Also Published As

Publication number Publication date
DE29806081U1 (en) 1998-08-06
JPH11321505A (en) 1999-11-24
US6375217B2 (en) 2002-04-23
EP0947393A1 (en) 1999-10-06

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AS Assignment

Owner name: TRW OCCUPANT RESTRAINT SYSTEMS GMBH & CO. KG, GERM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FISCHER, ANTON;REEL/FRAME:009869/0836

Effective date: 19990317

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20060423