US20150258958A1 - Passenger airbag with secondary chamber - Google Patents
Passenger airbag with secondary chamber Download PDFInfo
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- US20150258958A1 US20150258958A1 US14/209,752 US201414209752A US2015258958A1 US 20150258958 A1 US20150258958 A1 US 20150258958A1 US 201414209752 A US201414209752 A US 201414209752A US 2015258958 A1 US2015258958 A1 US 2015258958A1
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- airbag
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- primary chamber
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- 238000001514 detection method Methods 0.000 claims abstract 3
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000004088 simulation Methods 0.000 description 6
- 206010019196 Head injury Diseases 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 208000029028 brain injury Diseases 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
-
- 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
- B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
-
- 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
- B60R21/239—Inflatable members characterised by their venting means
-
- 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
- B60R2021/0002—Type of accident
- B60R2021/0009—Oblique collision
-
- 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
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
- B60R2021/23308—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other the individual compartments defining the external shape of the bag
-
- 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
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
- B60R2021/23324—Inner walls crating separate compartments, e.g. communicating with vents
-
- 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
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
- B60R2021/23324—Inner walls crating separate compartments, e.g. communicating with vents
- B60R2021/23332—Inner walls crating separate compartments, e.g. communicating with vents using independent bags, one within the other
Definitions
- a potential cause of head injuries in vehicle collisions is a rotation of a vehicle occupant's head.
- vehicles traveling in opposite directions may collide at an angle, striking each other on a driver's side of a target vehicle.
- an occupant in a passenger-side seat of the target vehicle may experience head rotation, that consequently may induce head injury, as the occupant's head strikes a passenger airbag and rolls toward the driver's side of the vehicle.
- Present passenger airbags may not be problematic with head rotation in a direct head-on collision.
- present passenger airbags have deficiencies with respect to their ability to minimize head rotation and head injury in oblique collisions.
- FIG. 1 is a block diagram of first and second vehicles on an oblique impact collision course.
- FIG. 2 is a top perspective view of a vehicle portion including a passenger airbag having a primary chamber and a secondary chamber.
- FIG. 3 is a top cross-sectional view of a vehicle portion including a passenger airbag having a primary chamber and a secondary chamber.
- FIG. 4 is a further top cross-sectional view of a vehicle portion 4 including a passenger airbag having a primary chamber and a secondary chamber, showing a human head striking the airbag upon an oblique impact.
- FIG. 5 is a side perspective view of a vehicle portion including a passenger airbag having a primary chamber and a secondary chamber.
- FIGS. 6A-6E provide respective side perspective views of exemplary secondary chambers attached to a primary chamber.
- FIGS. 7A and 7B are perspective views of respective exemplary airbags 10 , illustrating exemplary mechanisms for affixing the secondary chamber 12 to the primary chamber 11 .
- FIG. 8 provides a graph showing respective Brain Injury Criterion (BrIC) scores for airbags with and without a secondary chamber.
- FIG. 9 includes two series of block diagrams representing times-series simulations of a human head striking an airbag.
- FIG. 1 is a block diagram of first and second vehicles 1 , 2 on an oblique impact collision course.
- the vehicles 1 , 2 will strike each other at an angle 3, defined by longitudinal axes A, B of the vehicles 1 , 2 , respectively.
- the angle 3 is 15 degrees, which is an angle used in an oblique impact test mode of the National Highway Transportation and Safety Administration (NHTSA). Accordingly, when the vehicle 2 strikes the vehicle 1 , a passenger seated in the vehicle 2 will be moved in a direction at an angle to the axis B of the vehicle 2 .
- NHTSA National Highway Transportation and Safety Administration
- the passenger could move in a general direction of the arrow C; the direction of the passenger's movement being determined by a variety of known factors, such as speed, angle of impact, center of gravity of the vehicles 1 , 2 , etc.
- a passenger seated in the vehicle 2 may experience head rotation, and more severe head injury that would have been experienced in a head-on collision, e.g., measured by a Brain Injury Criterion (BrIC) score, such as is known.
- BrIC Brain Injury Criterion
- FIG. 2 is a top perspective view of a vehicle portion 4 .
- the vehicle portion 4 includes a passenger airbag 10 having a primary chamber 11 and a secondary chamber 12 , the airbag 10 being shown in an inflated state after having been deployed from a vehicle dash panel 14 .
- the airbag 10 is generally constructed from conventional materials, and may be deployed in a conventional manner, including as described below.
- the secondary chamber 12 is positioned to mitigate a tendency of a vehicle occupant's head to roll or rotate upon an oblique impact. That is, although the airbag 10 is shown on a passenger's side of a vehicle (assuming a left-hand drive), and the secondary chamber 12 is thus located to the left of the primary chamber 11 , to thereby mitigate head rotation in a direction toward the secondary chamber 12 . Alternatively or additionally, the secondary chamber 12 could be located to the right of the primary chamber 11 . For example, to protect the front passenger if the passenger side is the struck side such as vehicle 1 in FIG.
- the primary chamber 11 contacts first and second reaction surface when the airbag 10 is inflated. That is, the primary chamber 11 contacts the dash or instrument panel 14 , as well as a vehicle windshield 15 , when the airbag 10 is inflated.
- the secondary chamber 12 contacts only one reaction surface when the airbag 10 is inflated, e.g., the instrument panel 14 .
- FIG. 3 is a top cross-sectional view of a vehicle portion 4 including a passenger airbag 10 in an inflated state.
- the airbag 10 includes a primary chamber 11 and a secondary chamber 12 .
- the vehicle dash 14 has disposed therein an inflator 18 , such as is known.
- inflator 18 upon a triggering event, e.g., a collision, being detected by an airbag controller (not shown), may inflate the airbag 10 via an inflator valve 20 .
- FIG. 3 further illustrates passage 16 between the primary chamber 11 and the secondary chamber 12 .
- the secondary chamber 12 may be affixed to the primary chamber 11 using conventional mechanisms, e.g., sewn, glued, bonded, etc., wherein a wall 15 may be defined between the primary chamber 11 and the secondary chamber 12 , and further wherein an opening may be left in a seam connecting the primary and secondary chambers 11 , 12 to create the passage 16 .
- the passage 16 may include an opening having disposed therein a one-way valve 17 or the like to allow gases to travel from the primary chamber 11 to the secondary chamber 12 upon an event such as a collision triggering inflation of the airbag 10 .
- the passage 16 is shown as rectangular in FIG. 3 , often it is circular, and/or the valve 17 may be omitted, as seen in FIGS. 7A and 7B .
- FIG. 7A is a perspective view of an exemplary airbag 10 , illustrating an exemplary mechanism for affixing the secondary chamber 12 to the primary chamber 11 .
- the secondary chamber 12 is affixed to a wall 23 of the primary chamber 11 with stitching along a set of seams 19 defined by a perimeter of the secondary chamber 12 affixed to the wall 23 .
- FIG. 7B is a perspective view of an exemplary airbag 10 , illustrating an exemplary mechanism for affixing the secondary chamber 12 to the primary chamber 11 .
- the secondary chamber 12 is affixed to a wall 23 of the primary chamber 11 with stitching along a set of seams 19 .
- the secondary chamber 12 extends to a great height than does the primary chamber 11 , the set of seams 19 do not extend all the way around a perimeter of a side of the secondary chamber 12 .
- seams 19 define a portion of the perimeter of a side of the secondary chamber 12 attached to the wall 23 .
- a remaining subset of one or more of the seams 19 generally coincide with a top edge 24 of the wall 23 , the edge 24 being where the secondary chamber 12 is joined to the wall 23 of the primary chamber 11 .
- the size of an opening in the passage 16 , and/or a rate at which the passage 16 , including possibly the one-way valve 17 therein, is configured to allow gases to move from the primary chamber 11 to the secondary chamber 12 may depend on a variety of factors.
- the airbag 10 may vary in size and configuration depending on a type and/or size of vehicle in which it is installed.
- an airbag controller could be configured to control a valve in the passage 16 depending on various conditions.
- the valve 17 could be opened if an oblique impact was detected, but left closed, i.e., such that the secondary chamber would not inflate, if a direct frontal or head-on collision was detected.
- control of a valve 17 could depend on other crash modes, e.g., the valve 17 could be configured to open in an offset deformable barrier (ODB) crash mode used in crash testing.
- ODB offset deformable barrier
- FIG. 4 is a further top cross-sectional view of a vehicle portion 4 including a passenger airbag 10 having a primary chamber 11 and a second chamber 12 , showing a human head 22 striking the airbag 10 upon an oblique impact.
- a passenger airbag 10 having a primary chamber 11 and a second chamber 12
- the head 22 is likely to rotate in a clockwise direction as a passenger is moved at an angle to the axis B.
- the secondary chamber 12 is provided. Further, the secondary chamber 12 may be deployed with a greater firmness than the primary chamber 11 to further minimize rotation of the passenger head 22 .
- FIG. 5 is a side perspective view of a vehicle portion 4 including a passenger airbag 10 having a primary chamber 11 and a secondary chamber 12 .
- a passenger airbag 10 having a primary chamber 11 and a secondary chamber 12 .
- an arrow is provided to show a direction of rotation of the head 22 of a vehicle passenger upon an oblique impact to the vehicle.
- the secondary chamber 12 of the airbag 10 provides a barrier to reduce rotation of the passenger head 22 , such barrier not being provided by the airbag 10 with the primary chamber 11 alone.
- FIGS. 6A-6E respectively provide perspective views of exemplary secondary chambers 12 .
- the secondary chamber 12 has been shown as generally having the shape of a rectangular solid in the preceding illustrations, e.g., in a shape reflected by the secondary chamber 12 a shown in FIG. 6 , other shapes may be used depending on various factors, so long as the secondary chamber 12 is configured to contact a single reaction surface, e.g., the instrument panel 14 , when an impact is detected, whereas the primary chamber 11 is configured to contact at least two reaction surfaces when an impact is detected, e.g., the instrument panel 14 and windshield 15 .
- the secondary chamber 12 may be generally U-shaped, as reflected in the exemplary secondary chamber 12 b, generally trapezoidal or roughly triangular as reflected in the secondary chamber 12 c, and/or could include an opening as shown with respect to the secondary chamber 12 d.
- the secondary chamber 12 may be generally rectangular or oblong as illustrated by the secondary chamber 12 e, where the chamber 12 has at least a length or height greater than a corresponding length or height of the primary chamber 11 , e.g., an end of the chamber 12 extends beyond, e.g., is higher than, the primary chamber 11 .
- FIG. 8 provides a graph showing respective BrIC scores comparison for airbags with and without a secondary chamber 12 according to a simulation.
- the use of an airbag 10 including a primary chamber 11 and also a secondary chamber 12 results in a roughly 30 percent improvement in reduced BrIC score for the vehicle passenger compared to the use of an airbag 10 having a conventional design, i.e., including a primary chamber 11 , but not a secondary chamber 12 as disclosed herein, in a simulation of an oblique impact in a vehicle.
- FIG. 9 includes two series of block diagrams representing times-series simulations of a human head 22 striking an airbag 10 .
- a top set of simulations shows a head 22 striking an airbag having only a primary chamber 11 at a series of times following an impact, i.e., 52, 60, 66, 70, and 74 milliseconds, respectively.
- a bottom set of simulations shows a head 22 striking and airbag 10 having a primary chamber 11 but also a secondary chamber 12 at the same series of times following an impact.
- the airbag 10 including the secondary chamber 12 results in less head 22 rotation than the airbag having only a primary chamber 11 .
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Abstract
Description
- A potential cause of head injuries in vehicle collisions, particularly when a collision includes an oblique impact, is a rotation of a vehicle occupant's head. For example, vehicles traveling in opposite directions may collide at an angle, striking each other on a driver's side of a target vehicle. In this scenario, an occupant in a passenger-side seat of the target vehicle may experience head rotation, that consequently may induce head injury, as the occupant's head strikes a passenger airbag and rolls toward the driver's side of the vehicle. Present passenger airbags may not be problematic with head rotation in a direct head-on collision. However, present passenger airbags have deficiencies with respect to their ability to minimize head rotation and head injury in oblique collisions.
-
FIG. 1 is a block diagram of first and second vehicles on an oblique impact collision course. -
FIG. 2 is a top perspective view of a vehicle portion including a passenger airbag having a primary chamber and a secondary chamber. -
FIG. 3 is a top cross-sectional view of a vehicle portion including a passenger airbag having a primary chamber and a secondary chamber. -
FIG. 4 is a further top cross-sectional view of avehicle portion 4 including a passenger airbag having a primary chamber and a secondary chamber, showing a human head striking the airbag upon an oblique impact. -
FIG. 5 is a side perspective view of a vehicle portion including a passenger airbag having a primary chamber and a secondary chamber. -
FIGS. 6A-6E provide respective side perspective views of exemplary secondary chambers attached to a primary chamber. -
FIGS. 7A and 7B are perspective views of respectiveexemplary airbags 10, illustrating exemplary mechanisms for affixing thesecondary chamber 12 to theprimary chamber 11. -
FIG. 8 provides a graph showing respective Brain Injury Criterion (BrIC) scores for airbags with and without a secondary chamber. -
FIG. 9 includes two series of block diagrams representing times-series simulations of a human head striking an airbag. -
FIG. 1 is a block diagram of first andsecond vehicles 1, 2 on an oblique impact collision course. As illustrated inFIG. 1 , thevehicles 1, 2 will strike each other at anangle 3, defined by longitudinal axes A, B of thevehicles 1, 2, respectively. In the example ofFIG. 1 , theangle 3 is 15 degrees, which is an angle used in an oblique impact test mode of the National Highway Transportation and Safety Administration (NHTSA). Accordingly, when thevehicle 2 strikes the vehicle 1, a passenger seated in thevehicle 2 will be moved in a direction at an angle to the axis B of thevehicle 2. For example, the passenger could move in a general direction of the arrow C; the direction of the passenger's movement being determined by a variety of known factors, such as speed, angle of impact, center of gravity of thevehicles 1, 2, etc. In this scenario, a passenger seated in thevehicle 2 may experience head rotation, and more severe head injury that would have been experienced in a head-on collision, e.g., measured by a Brain Injury Criterion (BrIC) score, such as is known. -
FIG. 2 is a top perspective view of avehicle portion 4. Thevehicle portion 4 includes apassenger airbag 10 having aprimary chamber 11 and asecondary chamber 12, theairbag 10 being shown in an inflated state after having been deployed from avehicle dash panel 14. Theairbag 10 is generally constructed from conventional materials, and may be deployed in a conventional manner, including as described below. - As can be seen in
FIG. 2 , and as is further illustrated below, thesecondary chamber 12 is positioned to mitigate a tendency of a vehicle occupant's head to roll or rotate upon an oblique impact. That is, although theairbag 10 is shown on a passenger's side of a vehicle (assuming a left-hand drive), and thesecondary chamber 12 is thus located to the left of theprimary chamber 11, to thereby mitigate head rotation in a direction toward thesecondary chamber 12. Alternatively or additionally, thesecondary chamber 12 could be located to the right of theprimary chamber 11. For example, to protect the front passenger if the passenger side is the struck side such as vehicle 1 inFIG. 1 , or in countries where a passenger's side of a vehicle is on the left rather than the right, it could be desirable to place thesecondary chamber 12 to the right of theprimary chamber 11. Further, it is possible to include two or moresecondary chambers 12 affixed to theprimary chamber 11, e.g., one to the left as shown inFIG. 2 , and another to the right. - As best seen in
FIG. 5 , and also illustrated inFIG. 2 , theprimary chamber 11 contacts first and second reaction surface when theairbag 10 is inflated. That is, theprimary chamber 11 contacts the dash orinstrument panel 14, as well as avehicle windshield 15, when theairbag 10 is inflated. Thesecondary chamber 12, in contrast, contacts only one reaction surface when theairbag 10 is inflated, e.g., theinstrument panel 14. -
FIG. 3 is a top cross-sectional view of avehicle portion 4 including apassenger airbag 10 in an inflated state. Theairbag 10 includes aprimary chamber 11 and asecondary chamber 12. Thevehicle dash 14 has disposed therein aninflator 18, such as is known. As is further known,inflator 18, upon a triggering event, e.g., a collision, being detected by an airbag controller (not shown), may inflate theairbag 10 via aninflator valve 20. -
FIG. 3 further illustratespassage 16 between theprimary chamber 11 and thesecondary chamber 12. For example, thesecondary chamber 12 may be affixed to theprimary chamber 11 using conventional mechanisms, e.g., sewn, glued, bonded, etc., wherein awall 15 may be defined between theprimary chamber 11 and thesecondary chamber 12, and further wherein an opening may be left in a seam connecting the primary andsecondary chambers passage 16. Alternatively or additionally, thepassage 16 may include an opening having disposed therein a one-way valve 17 or the like to allow gases to travel from theprimary chamber 11 to thesecondary chamber 12 upon an event such as a collision triggering inflation of theairbag 10. Although thepassage 16 is shown as rectangular inFIG. 3 , often it is circular, and/or thevalve 17 may be omitted, as seen inFIGS. 7A and 7B . -
FIG. 7A is a perspective view of anexemplary airbag 10, illustrating an exemplary mechanism for affixing thesecondary chamber 12 to theprimary chamber 11. Specifically, in the example ofFIG. 7A , thesecondary chamber 12 is affixed to awall 23 of theprimary chamber 11 with stitching along a set ofseams 19 defined by a perimeter of thesecondary chamber 12 affixed to thewall 23. -
FIG. 7B is a perspective view of anexemplary airbag 10, illustrating an exemplary mechanism for affixing thesecondary chamber 12 to theprimary chamber 11. Specifically, in the example ofFIG. 7B , similar to the example ofFIG. 7A , thesecondary chamber 12 is affixed to awall 23 of theprimary chamber 11 with stitching along a set ofseams 19. However, because in theexemplary airbag 10 ofFIG. 7B (as in theexemplary airbag 10 including asecondary chamber 12 e, discussed below with respect toFIG. 6E ), thesecondary chamber 12 extends to a great height than does theprimary chamber 11, the set ofseams 19 do not extend all the way around a perimeter of a side of thesecondary chamber 12. Instead, some of theseams 19 define a portion of the perimeter of a side of thesecondary chamber 12 attached to thewall 23. A remaining subset of one or more of theseams 19 generally coincide with atop edge 24 of thewall 23, theedge 24 being where thesecondary chamber 12 is joined to thewall 23 of theprimary chamber 11. - The size of an opening in the
passage 16, and/or a rate at which thepassage 16, including possibly the one-way valve 17 therein, is configured to allow gases to move from theprimary chamber 11 to thesecondary chamber 12, may depend on a variety of factors. For example, theairbag 10 may vary in size and configuration depending on a type and/or size of vehicle in which it is installed. Further, an airbag controller could be configured to control a valve in thepassage 16 depending on various conditions. For example, thevalve 17 could be opened if an oblique impact was detected, but left closed, i.e., such that the secondary chamber would not inflate, if a direct frontal or head-on collision was detected. Likewise, control of avalve 17 could depend on other crash modes, e.g., thevalve 17 could be configured to open in an offset deformable barrier (ODB) crash mode used in crash testing. - Yet further, a degree to which a
valve 17 is open could depend on a detected or predicted angle of the oblique impact. For example, where an angle of impact is greater, e.g., greater than 15 degrees, greater than 30 degrees, etc., it may be desirable to open thevalve 17 all the way, or to a greater degree, because in this scenario it would be desirable for thesecondary chamber 12 to be relatively stiff or firm compared to theprimary chamber 11. That is, a stiffness or firmness of thesecondary chamber 12 may be configured to accommodate a predicted angle of impact and consequently likely head rotation of a vehicle passenger. In general, so that a configuration of thepassage 16 may control inflation, stiffness, firmness, etc. of thesecondary chamber 12, thesecondary chamber 12 is not vented or provided with openings or passageways other than thepassage 16. Theprimary chamber 11, on the other hand, may be vented in a conventional manner. -
FIG. 4 is a further top cross-sectional view of avehicle portion 4 including apassenger airbag 10 having aprimary chamber 11 and asecond chamber 12, showing ahuman head 22 striking theairbag 10 upon an oblique impact. As shown by the arrow around the circle representing thehead 22, upon an oblique impact, i.e., at an angle to a vehicle axis B, thehead 22 is likely to rotate in a clockwise direction as a passenger is moved at an angle to the axis B. To mitigate such rotation, thesecondary chamber 12 is provided. Further, thesecondary chamber 12 may be deployed with a greater firmness than theprimary chamber 11 to further minimize rotation of thepassenger head 22. -
FIG. 5 is a side perspective view of avehicle portion 4 including apassenger airbag 10 having aprimary chamber 11 and asecondary chamber 12. As withFIG. 4 , an arrow is provided to show a direction of rotation of thehead 22 of a vehicle passenger upon an oblique impact to the vehicle. As can again be seen, thesecondary chamber 12 of theairbag 10 provides a barrier to reduce rotation of thepassenger head 22, such barrier not being provided by theairbag 10 with theprimary chamber 11 alone. -
FIGS. 6A-6E respectively provide perspective views of exemplarysecondary chambers 12. Although thesecondary chamber 12 has been shown as generally having the shape of a rectangular solid in the preceding illustrations, e.g., in a shape reflected by thesecondary chamber 12 a shown inFIG. 6 , other shapes may be used depending on various factors, so long as thesecondary chamber 12 is configured to contact a single reaction surface, e.g., theinstrument panel 14, when an impact is detected, whereas theprimary chamber 11 is configured to contact at least two reaction surfaces when an impact is detected, e.g., theinstrument panel 14 andwindshield 15. For example, it is generally desirable to reduce the size and weight of components included in a vehicle, including airbags and airbag components. Accordingly, thesecondary chamber 12 may be generally U-shaped, as reflected in the exemplarysecondary chamber 12 b, generally trapezoidal or roughly triangular as reflected in thesecondary chamber 12 c, and/or could include an opening as shown with respect to thesecondary chamber 12 d. Further, thesecondary chamber 12 may be generally rectangular or oblong as illustrated by thesecondary chamber 12 e, where thechamber 12 has at least a length or height greater than a corresponding length or height of theprimary chamber 11, e.g., an end of thechamber 12 extends beyond, e.g., is higher than, theprimary chamber 11. -
FIG. 8 provides a graph showing respective BrIC scores comparison for airbags with and without asecondary chamber 12 according to a simulation. As can be seen, the use of anairbag 10 including aprimary chamber 11 and also asecondary chamber 12 results in a roughly 30 percent improvement in reduced BrIC score for the vehicle passenger compared to the use of anairbag 10 having a conventional design, i.e., including aprimary chamber 11, but not asecondary chamber 12 as disclosed herein, in a simulation of an oblique impact in a vehicle. - A further illustration of benefits of the presently disclosed
airbag 10 is provided inFIG. 9 , which includes two series of block diagrams representing times-series simulations of ahuman head 22 striking anairbag 10. A top set of simulations shows ahead 22 striking an airbag having only aprimary chamber 11 at a series of times following an impact, i.e., 52, 60, 66, 70, and 74 milliseconds, respectively. A bottom set of simulations shows ahead 22 striking andairbag 10 having aprimary chamber 11 but also asecondary chamber 12 at the same series of times following an impact. As can be seen, theairbag 10 including thesecondary chamber 12 results inless head 22 rotation than the airbag having only aprimary chamber 11. - In the drawings, the same reference numbers indicate the same elements. Further, some or all of these elements could be changed. Accordingly, it is to be understood that the above description is intended to be illustrative and not restrictive. Many embodiments and applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the invention should be determined, not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. It is anticipated and intended that future developments will occur in the arts discussed herein, and that the disclosed systems and methods will be incorporated into such future embodiments. In sum, it should be understood that the invention is capable of modification and variation and is limited only by the following claims.
- All terms used in the claims are intended to be given their broadest reasonable constructions and their ordinary meanings as understood by those skilled in the art unless an explicit indication to the contrary in made herein. In particular, use of the singular articles such as “a,” “the,” “said,” etc. should be read to recite one or more of the indicated elements unless a claim recites an explicit limitation to the contrary.
Claims (24)
Priority Applications (6)
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US14/209,752 US9150186B1 (en) | 2014-03-13 | 2014-03-13 | Passenger airbag with secondary chamber |
US14/226,904 US9340176B2 (en) | 2014-03-13 | 2014-03-27 | Passenger airbag with secondary chamber |
DE102015103095.0A DE102015103095B4 (en) | 2014-03-13 | 2015-03-04 | Passenger airbag with secondary chamber |
RU2015108653A RU2658534C2 (en) | 2014-03-13 | 2015-03-12 | Vehicle airbag |
MX2015003258A MX2015003258A (en) | 2014-03-13 | 2015-03-12 | Passenger airbag with secondary chamber. |
CN201510111341.0A CN104908699B (en) | 2014-03-13 | 2015-03-13 | Airbag with concubine |
Applications Claiming Priority (1)
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US14/209,752 US9150186B1 (en) | 2014-03-13 | 2014-03-13 | Passenger airbag with secondary chamber |
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US14/226,904 Continuation-In-Part US9340176B2 (en) | 2014-03-13 | 2014-03-27 | Passenger airbag with secondary chamber |
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CN (1) | CN104908699B (en) |
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Also Published As
Publication number | Publication date |
---|---|
CN104908699A (en) | 2015-09-16 |
DE102015103095B4 (en) | 2023-05-17 |
RU2015108653A (en) | 2016-09-27 |
MX2015003258A (en) | 2015-09-14 |
RU2658534C2 (en) | 2018-06-21 |
DE102015103095A1 (en) | 2015-09-17 |
US9150186B1 (en) | 2015-10-06 |
CN104908699B (en) | 2019-03-22 |
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