U.S. patent application number 16/573628 was filed with the patent office on 2021-03-18 for driver side airbag module.
This patent application is currently assigned to Joyson Safety Systems Acquisition LLC. The applicant listed for this patent is Joyson Safety Systems Acquisition LLC. Invention is credited to Roland FURTADO, Justin MILLS, Pratik RANE.
Application Number | 20210078522 16/573628 |
Document ID | / |
Family ID | 1000004470987 |
Filed Date | 2021-03-18 |
United States Patent
Application |
20210078522 |
Kind Code |
A1 |
MILLS; Justin ; et
al. |
March 18, 2021 |
DRIVER SIDE AIRBAG MODULE
Abstract
A driver's side airbag module for a vehicle. The airbag module
includes an upper panel, a lower panel, and an extension panel. The
extension panel has a varying width. A lateral tether restrains the
extension panel in the lateral direction when the airbag module is
deployed. The extension panel and the lateral tether create an
oblong shaped airbag cushion. The airbag module also includes a
lower tether that connects the lower panel and the bottom of the
upper panel so that the upper panel is held on the bottom portion
during deployment.
Inventors: |
MILLS; Justin; (Shelby Twp.,
MI) ; RANE; Pratik; (Troy, MI) ; FURTADO;
Roland; (Novi, MI) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Joyson Safety Systems Acquisition LLC |
Auburn Hills |
MI |
US |
|
|
Assignee: |
Joyson Safety Systems Acquisition
LLC
Auburn Hills
MI
|
Family ID: |
1000004470987 |
Appl. No.: |
16/573628 |
Filed: |
September 17, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B60R 21/203 20130101;
B60R 21/26 20130101; B60R 2021/23382 20130101; B60R 21/239
20130101; B60R 2021/0048 20130101; B60R 21/2338 20130101 |
International
Class: |
B60R 21/2338 20060101
B60R021/2338; B60R 21/203 20060101 B60R021/203; B60R 21/239
20060101 B60R021/239; B60R 21/26 20060101 B60R021/26 |
Claims
1. An airbag module comprising: a cushion, wherein the cushion
comprises a lower panel, an upper panel, and an extension panel;
wherein the extension panel is located between the lower panel and
the upper panel, and is connected to the perimeter of the lower
panel and the perimeter of the upper panel; and an inflator
configured to provide inflation gas to the cushion; and a lateral
tether connected to the extension panel at first and second lateral
sides of the extension panel, wherein the lateral tether is
configured to restrain the extension panel in the lateral direction
at the first and second lateral sides when the inflator inflates
the cushion.
2. The airbag module of claim 1, further comprising a lower tether
anchored adjacent to the lower panel at a first end and connected
to the upper panel at a second end.
3. The airbag module of claim 2, wherein the lower tether is
connected at a bottom portion of the upper panel, wherein the lower
tether is configured to restrain the bottom portion of the upper
panel when the inflator inflates the cushion.
4. The airbag module of claim 3, further comprising a secondary
tether disposed in tandem with the lower tether.
5. The airbag module of claim 1, wherein the airbag cushion
includes at least one vent for allowing inflation gas to escape the
airbag cushion.
6. The airbag module of claim 5, wherein the at least one vent is
located on the lower panel.
7. The airbag module of claim 5, wherein the at least one vent is
located on the extension panel.
8. The airbag module of claim 2, further comprising a reinforcement
panel between the lower tether and the upper panel, wherein the
reinforcement panel is connected to the upper panel.
9. The airbag module of claim 1, wherein the extension panel varies
in width along the perimeter of the cushion.
10. The airbag module of claim 9, wherein the extension panel is
positioned so that the narrowest portion of the extension panel is
located at the bottom center of the airbag when the airbag
deploys.
11. The airbag module of claim 9, wherein the extension panel is
positioned so that a widest portion of the airbag is located at the
top center of the airbag when the airbag deploys.
12. A driver side airbag module comprising: a cushion, wherein the
cushion comprises a lower panel, an upper panel, and an extension
panel; wherein the extension panel is located between the lower
panel and the upper panel, and is connected to the perimeter of the
lower panel and the upper panel; an inflator configured to inject
gases into the cushion; a lateral tether connected to the extension
panel at first and second lateral sides of the extension panel,
wherein the lateral tether is configured to hold the extension
panel in the lateral direction when the inflator inflates the
cushion.
13. The driver side airbag module of claim 12, further comprising a
lower tether anchored adjacent to the lower panel at a first end
and connected to the upper panel at a second end.
14. The driver side airbag module of claim 12, wherein the
extension panel varies in width along the perimeter of the
cushion.
15. The airbag module of claim 14, wherein the extension panel is
positioned so that the narrowest portion of the extension panel is
located at the bottom center of the airbag when the airbag
deploys.
16. The driver side airbag module of claim 13, wherein the lower
tether is connected at a bottom portion of the upper panel, wherein
the lower tether is configured to hold the bottom portion of the
upper panel when the inflator inflates the cushion.
17. An airbag cushion comprising: a lower panel, an upper panel,
and an extension panel; wherein the extension panel is between the
lower panel and upper panel; wherein the lower panel comprises an
opening for an inflator configured to inject gas into the cushion,
the lower panel, the upper panel, and the extension panel create an
inflatable chamber configured to enclose the gases from the
inflator; and a lateral tether connected to the extension panel at
first and second lateral sides of the extension panel, wherein the
lateral tether is configured to hold the extension panel in the
lateral direction when the inflator inflates the cushion.
18. The airbag cushion of claim 17, further comprising a lower
tether anchored adjacent to the lower panel at a first end and
connected to the upper panel at a second end.
19. The airbag cushion of claim 16, wherein the extension panel
varies in width along the perimeter of the cushion.
20. The airbag cushion of claim 19, wherein the extension panel is
positioned so that a widest portion of the airbag is located at the
top center of the airbag when the airbag deploys.
Description
[0001] The present disclosure relates to a driver side airbag
module and a steering wheel including such a module. In particular,
a driver's side airbag cushion with an extension panel and lateral
tether to control the shape of the airbag on the lateral sides.
[0002] A vehicle, such as an automobile, includes a steering system
for controlling a traveling direction. In general, an operation
mechanism of such a steering system includes, for example, a
steering wheel used by an occupant to control the steering angle.
Current airbags may not provide enough fore-aft depth to prevent
injury to the driver or passenger during high acceleration events
such as a crash. Furthermore, airbags may deploy into a shape that
may interfere with side curtain airbags.
[0003] The disclosed embodiments control the trajectory and shape
of the airbag cushion. By controlling the cushion trajectory and
speed, the performance of the airbag may be optimized. The airbag
cushion provides for a greater fore-aft depth for earlier occupant
engagement, while reducing interference with side curtain airbags
and maintaining targeted airbag volume.
[0004] To control the trajectory of the cushion, the airbag
comprises a three panel arrangement including an upper, a lower,
and an extension panel. The extension panel lies between the upper
and lower panels and a lateral tether is sewn to lateral sides of
the extension panel. The lateral sides lie on the 3'oclock and
9'oclock positions of the extension panel when the airbag is in the
deployed state. Upon deployment of the airbag, the lateral tether
prevents the airbag cushion from extending laterally, allowing for
a smaller lateral profile in the deployed position. Further
refinement of the airbag cushion shape can be done by also having
an additional lower tether to hold the upper panel.
[0005] Accordingly, an object of the present disclosure is to
provide an oblong shaped cushion for a driver side airbag.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] The features, aspects, and advantages of the present
disclosure will become apparent from the following description, and
the accompanying exemplary embodiments shown in the drawings, which
are briefly described below.
[0007] FIG. 1 is a passenger compartment of a vehicle with an
exemplary driver side airbag module.
[0008] FIG. 2 is a rear view of the driver side airbag cushion.
[0009] FIG. 3 is a sectional view C-C of the airbag cushion.
[0010] FIG. 4 is a sectional view B-B of the airbag cushion.
[0011] FIG. 5 is an isolated view of the lateral tether.
[0012] FIG. 6 is a side view of the deployed airbag module.
[0013] FIG. 7 is a front view of the deployed airbag module.
[0014] FIG. 8 is a cut set showing the fabric panels that form the
airbag cushion.
DETAILED DESCRIPTION
[0015] According to one embodiment of the disclosure, a steering
wheel comprises an airbag module. The airbag module comprises an
inflator (not shown) and airbag. The inflator is mounted in a
module housing. The module may also include a retainer for holding
the inflator in position and mounting the module to a structural
element of the vehicle such as, for example, the steering wheel
column. The airbag includes an airbag cushion that may include a
heat shield, a lateral tether, a lower tether, an upper panel, a
lower panel, and an extension panel. The upper panel, the lower
panel, and the extension panel define and enclose a volume of the
airbag cushion. The airbag cushion comprises a lateral tether and a
lower tether. The lateral tether is configured to hold the airbag
cushion in the lateral direction during deployment in a high
acceleration event such as a crash. The lateral tether is sewn onto
the extension panel of the airbag cushion at the lateral sides at
the 9 o'clock and 3 o'clock position. The lower tether is
configured to hold the airbag cushion in the aft direction at the
bottom of the upper panel at the 6 o'clock position, during
deployment in a high acceleration event. The combination of the
lateral and lower tethers creates an airbag cushion shape optimized
for passenger safety during high acceleration events.
[0016] FIG. 1 illustrates a vehicle 20 and a steering wheel 21
comprising a deployed driver side airbag module 100 with an
inflated cushion 1.
[0017] FIGS. 2 and 3 illustrate a rear view of the airbag cushion 1
and section C-C, respectively. The airbag cushion 1 includes a
lower panel 2. The lower panel includes an opening 3 for receiving
the inflator. The lower panel 2 is connected to at least one lower
tether 4. The lower tether 4 is sewn onto the lower panel 2 and may
optionally include multiple lower tethers 4 which may be sewn
together at a first end 11. The lower tether may be anchored
adjacent to the lower panel at the opening 3 to a retainer (not
shown) disposed adjacent to the opening 3. The retainer may be used
to secure all of the fabric panels in position. The first ends 11
of the lower tethers 4 are disposed between a heat shield 10 and
the lower panel 2 proximate the opening 3 of the lower panel 2. The
heatshield 10, first ends 11 of lower tethers 4, and lower panel 2
may be sewn together. A second end 12 of the lower tethers 4 is
connected to a bottom portion (6 o'clock position) of the upper
panel 5. The upper panel 5 is located closest to the passenger. The
lower tether restrains the upper panel during airbag deployment
from fully extending so that the bottom portion of the upper panel
is held aft relative to other portions of upper panel 5. A
reinforcement panel 6 may be connected to the upper panel 5
disposed between the lower tether 4 and the upper panel 5. Airbag
vents 7 are disposed on the lower panel to control the deceleration
over time of the passenger after deployment of the airbag. Airbag
vents 7 may also be disposed on the extension panel. Different
deceleration profiles may be provided depending on the placement of
the vents 7. Sewing threads 24 are disposed to attach the panels
and tethers.
[0018] The extension panel 8 is located between lower panel 2 and
upper panel 5. The extension panel 8 may be connected to the lower
panel 2 at the extension panel aft end and to the upper panel 5 at
the extension panel forward end. The extension panel 8 may be sewn
to both upper panel 5 and lower panel 2. A lateral tether 9 is
connected to the extension panel 8 at lateral attachment regions 23
of the extension panel. The attachment regions 23 for the lateral
tether 9 on the sides of the airbag cushion may be located at the 3
o'clock and 9 o'clock positions of the airbag cushion. The lateral
tether 9 may alternatively be connected to the extension panel 8 at
other locations, as described further below. The different
locations of attachment of lateral tether 9 to extension panel 8
allows for different airbag shapes as required by different vehicle
safety configurations. The lateral tether may be sewn to the
extension panel. The lateral tether prevents the extension panel
from expanding in the lateral direction when the airbag cushion 1
is deployed. The lateral tether restrains the expansion of the
airbag cushion to create an oblong shaped airbag cushion in the
deployed position. This shape allows for greater fore-aft depth for
earlier occupant engagement while reducing interference with the
side curtain airbags and maintaining targeted airbag cushion
volume. The ends of lateral tether of the airbag may be secured to
the extension panel at different locations, for example, at the 2
o'clock and 8 o clock positions. The attachment regions for the
lateral tether do not have to be opposite or symmetrically located
on the airbag. For example, the lateral tether may be secured at
attachment regions on the extension panel located at the 10 o'clock
position and 2 o'clock position or the 11 o'clock position and the
7 o'clock position of the airbag. The shape of the airbag may be
modified by adjusting the attachment regions of the lateral tether
to accommodate different vehicle configurations. The heat shield 10
is placed between the lateral tether 9 and the lower tethers 4 to
prevent hot gases from the inflator 22 from damaging the upper
panel 5 and the lateral tether 9.
[0019] FIG. 4 illustrates section B-B as labeled in FIG. 2.
Reinforcement panel 6 is configured to prevent the upper panel 5
from ripping or detaching from the lower tether 4 at the second end
12 upon deployment of the airbag. Reinforcement panel 6 may be sewn
onto the upper panel 5. The lower tethers 4 may be sewn together
onto the reinforcement panel 6 and the upper panel 5. Sewing
threads 24 are disposed for sewing the reinforcement panel 6 to the
upper panel 5 and the lower tethers 4. The perimeter of extension
panel 8 follows the perimeter of the upper panel 5 and lower panel
2. The width of the extension 8 panel varies along the perimeter of
the panel as shown in FIG. 8. In the exemplary embodiment shown,
the width of the extension panel at the 12 o'clock position is
wider than the width of the extension panel at the 6 o'clock
position. This exemplary shape of the extension panel 8 allows for
greater fore-aft depth at the upper 12 o'clock position with the
widest portion of extension panel 8 relative to the bottom 6
o'clock position with the narrowest portion of the extension panel
8. The width of the extension panel may be modified to allow
different cushion shapes during deployment. For example, the widest
portion of the extension panel may occur at the 3 o'clock position
and the narrowest portion of the extension panel may occur at the 9
o'clock position. In addition, the width may be varied so that
widest and narrowest portions of the panel are not located on
opposite sides of the airbag cushion. The width variation and width
profile of the extension panel along its perimeter may be tailored
to different vehicle configurations. The width as described herein
is defined as the dimension of the extension panel 8 that extends
from the forward end of the lower panel 2 to the aft end of the
upper panel 5.
[0020] FIG. 5 illustrates an exemplary lateral tether 9. The
lateral tether 9 extends in the lateral direction relative to the
deployed airbag cushion. The lateral tether may have a bow tie
shape. The lateral tether may be connected to the extension panel 8
by sewing the lateral sides 25 of the lateral tether to the
attachment regions 23 on the extension panel 8.
[0021] FIGS. 6 and 7 are a side view and a front view,
respectively, of a deployed airbag module 100. The lower panel 2
may be secured to the inflator or airbag module housing and is sewn
onto the extension panel 8 which is located forward of the lower
panel 2. Extension panel 8 is sewn onto the upper panel 5 and is
located aft of the upper panel 5. A dimple 30 is located at the
lateral sides of the deployed airbag at the extension panel 8.
Lateral dimples 30 are created from the lateral tether 9 holding
the extension panel at the laterals sides (3 o'clock and 9 o'clock
positions). The lower tethers 4 hold the bottom of upper panel 5
and create forward dimple 31.
[0022] FIG. 8 shows an exemplary cut set for the fabric portion of
the airbag module. The pieces shown in FIG. 8 are an exemplary
non-limiting embodiment. The number of lateral and lower tethers
may be tailored depending on the required airbag shape in order to
accommodate different vehicle safety requirements and
constraints.
[0023] The lower panel 2, upper panel 5, extension panel 8,
lateral/lower tethers 9/4, and reinforcement panel 6 may be made of
fabric with enough strength to endure high acceleration and
temperatures of hot gases from the inflator during deployment in a
high acceleration event. Tether attachment locations described
above are exemplary and are non-limiting. Tether attachment
locations for the lateral tether 9 and the lower tethers 4 may be
tailored to different vehicle configurations.
[0024] As utilized herein, the terms "approximately," "about,"
"substantially", and similar terms are intended to have a broad
meaning in harmony with the common and accepted usage by those of
ordinary skill in the art to which the subject matter of this
disclosure pertains. It should be understood by those of skill in
the art who review this disclosure that these terms are intended to
allow a description of certain features described and claimed
without restricting the scope of these features to the precise
numerical ranges provided. Accordingly, these terms should be
interpreted as indicating that insubstantial or inconsequential
modifications or alterations of the subject matter described and
claimed are considered to be within the scope of the disclosure as
recited in the appended claims.
[0025] It should be noted that the term "exemplary" as used herein
to describe various embodiments is intended to indicate that such
embodiments are possible examples, representations, and/or
illustrations of possible embodiments (and such term is not
intended to connote that such embodiments are necessarily
extraordinary or superlative examples).
[0026] The terms "coupled," "connected," and the like as used
herein mean the joining of two members directly or indirectly to
one another. Such joining may be stationary (e.g., permanent) or
moveable (e.g., removable or releasable). Such joining may be
achieved with the two members or the two members and any additional
intermediate members being integrally formed as a single unitary
body with one another or with the two members or the two members
and any additional intermediate members being attached to one
another.
[0027] References herein to the positions of elements (e.g., "top,"
"bottom," "above," "below," etc.) are merely used to describe the
orientation of various elements in the FIGURES. It should be noted
that the orientation of various elements may differ according to
other exemplary embodiments, and that such variations are intended
to be encompassed by the present disclosure.
[0028] It is important to note that the construction and
arrangement of the airbag module as shown in the various exemplary
embodiments is illustrative only. Although only a few embodiments
have been described in detail in this disclosure, those skilled in
the art who review this disclosure will readily appreciate that
many modifications are possible (e.g., variations in sizes,
dimensions, structures, shapes and proportions of the various
elements, values of parameters, mounting arrangements, use of
materials, colors, orientations, etc.) without materially departing
from the novel teachings and advantages of the subject matter
described herein. For example, elements shown as integrally formed
may be constructed of multiple parts or elements, the position of
elements may be reversed or otherwise varied, and the nature or
number of discrete elements or positions may be altered or varied.
The order or sequence of any process or method steps may be varied
or re-sequenced according to alternative embodiments. Other
substitutions, modifications, changes and omissions may also be
made in the design, operating conditions and arrangement of the
various exemplary embodiments without departing from the scope of
the present disclosure.
* * * * *