U.S. patent application number 14/817288 was filed with the patent office on 2017-02-09 for fuel tank assembly including inflatable member.
This patent application is currently assigned to FORD GLOBAL TECHNOLOGIES, LLC. The applicant listed for this patent is Ford Global Technologies, LLC. Invention is credited to Saeed David Barbat, Iskander Farooq, Mohammed Omar Faruque, Dean M. Jaradi.
Application Number | 20170036626 14/817288 |
Document ID | / |
Family ID | 57853962 |
Filed Date | 2017-02-09 |
United States Patent
Application |
20170036626 |
Kind Code |
A1 |
Barbat; Saeed David ; et
al. |
February 9, 2017 |
FUEL TANK ASSEMBLY INCLUDING INFLATABLE MEMBER
Abstract
A fuel tank assembly includes a fuel tank, and an airbag
assembly connected to a fuel tank. The fuel tank includes a first
portion facing in a first direction, a second portion facing a
second direction which is opposite the first direction. The fuel
tank includes a rear portion extending between the first portion
and the second portion and facing in a rear direction transverse to
the first and second directions. The airbag assembly is connected
to the first portion, the second portion, and the rear portion of
the fuel tank. During a vehicle impact, an inflatable member of the
airbag assembly in an inflatable position may deflect impact debris
away from the fuel tank and/or may prevent underbody components
from coming contacting the fuel tank.
Inventors: |
Barbat; Saeed David; (Novi,
MI) ; Farooq; Iskander; (Novi, MI) ; Jaradi;
Dean M.; (Macomb, MI) ; Faruque; Mohammed Omar;
(Ann Arbor, MI) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Ford Global Technologies, LLC |
Dearborn |
MI |
US |
|
|
Assignee: |
FORD GLOBAL TECHNOLOGIES,
LLC
Dearborn
MI
|
Family ID: |
57853962 |
Appl. No.: |
14/817288 |
Filed: |
August 4, 2015 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B60K 15/063 20130101;
B60Y 2306/01 20130101; B60R 19/205 20130101; B60K 2015/0634
20130101 |
International
Class: |
B60R 19/20 20060101
B60R019/20; B60K 15/063 20060101 B60K015/063 |
Claims
1. A fuel tank assembly comprising: a fuel tank having an exterior
surface, the fuel tank including a first portion facing in a first
direction, a second portion facing a second direction opposite the
first direction, and a rear portion extending between the first
portion and the second portion and facing in a rear direction
transverse to the first and second directions; and an airbag
assembly having an inflatable member on the external surface and
being flexible relative to the fuel tank, the airbag assembly
connected to the first portion, the second portion, and the rear
portion
2. The fuel tank assembly as set forth in claim 1, wherein the fuel
tank includes a front portion facing in a front direction opposite
the rear direction and the airbag assembly is connected to the
front portion.
3. The fuel tank assembly as set forth in claim 1, wherein the
inflatable member extends continuously across the first portion,
the second portion, and the rear portion.
4. The fuel tank assembly as set forth in claim 1, wherein the
inflatable member is formed of an auxetic material.
5. The fuel tank assembly as set forth in claim 1, wherein the
inflatable member is formed of an ultra-high molecular weight
polyethylene material.
6. The fuel tank assembly as set forth in claim 1, wherein the
airbag assembly includes tabs spaced along the inflatable member,
the tabs being connected to the first portion, the second portion,
and the rear portion.
7. The fuel tank assembly as set forth in claim 6, wherein the fuel
tank includes at least one flange extending along the first
portion, the second portion, and the rear portion, the tabs being
connected to the flange.
8. The fuel tank assembly as set forth in claim 1, wherein the
airbag assembly includes an outer covering on the inflatable
member.
9. The fuel tank assembly as set forth in claim 8, wherein the
airbag assembly includes tabs connected to and spaced along the
inflatable member and extending through the outer covering, the
tabs being connected to the first portion, the second portion, and
the rear portion.
10. A system comprising: a fuel tank having an exterior surface,
the fuel tank including a first portion facing in a first
direction, a second portion facing a second direction opposite the
first direction, and a rear portion extending between the first
portion and the second portion and facing in a rear direction
transverse to the first and second directions; an airbag assembly
having an inflatable member on the external surface and being
flexible relative to the fuel tank, the airbag assembly connected
to the first portion, the second portion, and the rear portion; and
an inflator in communication with the airbag assembly.
11. The system as set forth in claim 11, wherein the inflator is
spaced from the fuel tank.
12. The system as set forth in claim 10, further comprising an
impact sensing system in communication with the inflator.
13. The system as set forth in claim 10, wherein the inflator is
configured to inflate the airbag assembly to 10-20 pounds per
square inch.
14. The system as set forth in claim 10, wherein the airbag
assembly is unvented.
15. The system as set forth in claim 10, wherein the fuel tank
includes a front portion facing in a front direction opposite the
rear direction and the airbag assembly is connected to the front
portion.
16. The system as set forth in claim 10, wherein the inflatable
member extends continuously across the first portion, the second
portion, and the rear portion.
17. The system as set forth in claim 10, wherein the inflatable
member is formed of an auxetic material.
18. The system as set forth in claim 10, wherein the inflatable
member is formed of an ultra-high molecular weight polyethylene
material.
19. The system as set forth in claim 10, wherein the airbag
assembly includes tabs spaced along the inflatable member, the tabs
being connected to the first portion, the second portion, and the
rear portion.
20. A fuel tank assembly comprising: a fuel tank having an exterior
surface, the fuel tank including a first portion facing in a first
direction, a second portion facing a second direction opposite the
first direction, and a rear portion extending between the first
portion and the second portion and facing in a rear direction
transverse to the first and second directions; and an airbag
assembly having an inflatable member on the external surface and
being flexible relative to the fuel tank, the inflatable member
supported by the fuel tank and inflatable to an inflated position
extending across the first portion, the second portion, and the
rear portion.
Description
BACKGROUND
[0001] Vehicles are subject to a variety of standardized testing,
such as the Federal Motor Vehicle Safety Standards (FMVSS)
regulated by the National Highway and Traffic Safety Administration
(NHTSA). One such standard that governs fuel system integrity is
FMVSS 301. Specifically, FMVSS 301 defines the fuel spillage
requirements for rear impacts up to 50 miles per hour. Some
vehicles, for example police vehicles, may be tested at rear
impacts up to 70 miles per hour.
[0002] Forces resulting from the rear impact may urge the vehicle
to deform, including in areas around the fuel tank. Vehicles may be
designed to include structural reinforcements and/or shields in
order to absorb and/or deflect these forces away from the fuel
tank. These additional components may disadvantageously add design
and material cost, complexity, and weight to the vehicle. As such,
there remains an opportunity to design a fuel tank assembly that
satisfies testing such as the FMVSS 301 test while reducing the
complexity and weight of structural reinforcements and/or shields
in the area around the fuel tank assembly.
[0003] Additionally for some vehicles, such as the police cars and
SUVs, extra reinforcements and structural barriers may be added to
the vehicle in an effort to protect the fuel tank from damage or
spillage, e.g., due to puncture, especially at higher speeds, e.g.,
speeds exceeding 70 mph. These reinforcements and structural
barriers may result in more cost and weight. As such there is an
opportunity to design a fuel tank to absorb such impacts while
reducing additional structural reinforcements or shields and
additional cost and weight associated therewith.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] FIG. 1 is a perspective view of a rear portion of a vehicle
including a fuel tank assembly with an airbag assembly in an
uninflated position.
[0005] FIG. 2 is a perspective view of the rear portion of the
vehicle with the airbag assembly in an inflated position.
[0006] FIG. 3 is a perspective view of the fuel tank assembly with
the airbag assembly in the inflated position as seen from a rear of
the vehicle.
[0007] FIG. 4 is a perspective view of the fuel tank assembly with
the airbag assembly in the inflated position as seen from a front
of the vehicle.
[0008] FIG. 5 is an exploded perspective view of the fuel tank
assembly showing the airbag assembly and a fuel tank.
[0009] FIG. 6 is a schematic of an impact absorbing system of the
vehicle.
DETAILED DESCRIPTION
[0010] With reference to the Figures, wherein like numerals
indicate like parts throughout the several views, FIGS. 1-2 show a
fuel tank assembly 10 for a vehicle 12 that includes a fuel tank 14
and an airbag assembly 16 connected to the fuel tank 14. The fuel
tank 14 includes a first portion 18 facing in a first direction,
and second portion 20 facing a second direction which is opposite
the first direction. The fuel tank 14 includes a rear portion 22
extending between the first portion 18 and the second portion 20
and facing in a rear direction transverse to the first and second
directions. The airbag assembly 16 is connected to the first
portion 18, the second portion 20, and the rear portion 22 of the
fuel tank 14, as shown in FIGS. 1-5.
[0011] With reference to FIGS. 1-2, during an impact of the vehicle
12, the airbag assembly 16 may be selectively inflated based on the
direction of the impact, as set forth below. For example, as set
forth below, during a rear end impact (identified with "F" in FIG.
2), and/or side impact of the vehicle 12, the airbag assembly 16
may inflate causing the airbag assembly 16 to extend along the
first portion 18, the second portion 20, and the rear portion 22 of
the fuel tank 14 as shown in FIGS. 2-4. In this situation, the
airbag assembly 16 may deflect debris away from the fuel tank 14,
which may reduce the likelihood of damage to the fuel tank 14. In
addition, the airbag assembly 16 may prevent underbody components
from deforming into and contacting the fuel tank 14 during the
vehicle impact, which may reduce the likelihood of damage to the
fuel tank 14. The airbag assembly 16 may allow for reduction or
elimination of other reinforcing components, e.g., reinforcing
structures and shields, around the fuel tank 14, which may reduce
development time and cost.
[0012] The airbag assembly 16 may be a component of an impact
absorbing system 24. The impact absorbing system 24 may include an
inflator 26 in communication with the airbag assembly 16.
Specifically, as set forth further below for example, the impact
absorbing system 24 may sense an impact of the vehicle 12 and may
trigger inflation of the airbag assembly 16 in response to the
sensed impact. In addition, the impact absorbing system 24 may
sense the type of impact, e.g., based on direction, magnitude,
etc., and may trigger inflation of the airbag assembly 16 in
response to the type of impact.
[0013] With reference to FIGS. 1-2 and as set forth above, the
inflator 26 may be spaced from the fuel tank assembly 10 and
installed forward of the fuel tank 14 toward a front end (not
shown) of the vehicle 12. The inflator 26 may be concealed to limit
or prevent environmental exposure, for example, water intrusion,
salt spray, dust, etc. The inflator 26 may be mounted to a bracket
(not shown), and the bracket may be mounted to a structural member
(not shown) of the vehicle 12.
[0014] The inflator 26, when activated by the impact absorbing
system 24, is configured to inflate an inflatable member 30 of the
airbag assembly 16 to predetermined pressure. More specifically,
the inflator 26 when activated by the impact absorbing system 24
may be configure to inflate the inflatable member 30 to a pressure
of 10-20 pounds per square inch.
[0015] With reference to FIGS. 1-2 and 4, the impact absorbing
system 24 may include a fill tube 32 extending from the inflator 26
to the airbag assembly 16. The inflator 26 may have one or more
ports 34, e.g., two ports 34 as shown in the Figures, in
communication with the airbag assembly 16 through the fill tube 32.
The fill tube 32 may include a first end 36 fixed to the port 34 of
the inflator 26, and a second end 38 spaced from the first end 36
and fixed to the inflatable member 30. The impact absorbing system
24 may include one or more fill tubes 32, e.g., two fill tubes 32
as shown in the Figures. The inflatable member 30 may include any
suitable number of connection points 40 spaced from each other to
receive the second end 38 of the fill tube 32.
[0016] The fill tube 32 may be formed of any suitable high strength
flexible material. For example, the fill tube 32 may be nitrile
rubber, nylon, thermoplastic elastomer (TPE), etc.
[0017] The inflator 26 may be, for example, a cold-gas inflator,
which, when activated, ignites a pyrotechnic charge that creates an
opening for releasing the pressurized inflation medium to the
airbag assembly 16 via the fill tube 32. Alternatively, the
inflator 26 may be of any suitable type, for example, a hybrid
inflator.
[0018] With reference to FIGS. 1-2, the fuel tank assembly 10 may
be received adjacent to the structural member of the vehicle 12.
The fuel tank assembly 10 may be attached to the structural member
with one or more straps 42. The straps 42 may be disposed between,
i.e. sandwiched between, the fuel tank 14 and the airbag assembly
16.
[0019] As set forth above, the fuel tank 14 includes the first
portion 18 facing in the first direction, and the second portion 20
facing in the second direction opposite the first direction.
Specifically, with reference to FIGS. 1-2, the first portion 18 may
face a left side 44 of the vehicle 12 and the second portion 20 may
face a right side 46 of the vehicle 12. The rear portion 22 may
face a rear end 48 of the vehicle 12. The fuel tank 14 may include
a front portion 50 facing in a front direction opposite the rear
direction. The front portion 50 may face the front end of the
vehicle 12.
[0020] As shown in FIG. 3-5, the fuel tank 14 may include a top
portion 52 extending between the first portion 18, the second
portion 20, the rear portion 22, and the front portion 50. The top
portion 52 faces upwardly in a direction transverse to the first
direction, the second direction, the rear direction, and the front
direction.
[0021] With reference to FIG. 5, the fuel tank 14 may include at
least one flange 54 extending along the first portion 18, the
second portion 20, the rear portion 22, and/or the front portion 50
of the fuel tank 14. For example, the fuel tank 14 may include a
plurality of flanges 54 spaced from each other along the first
portion 18, the second portion 20, the rear portion 22, and/or the
front portion 50 of the fuel tank 14. The fuel tank 14 may include
any suitable number of flanges 54, i.e., one or more.
[0022] The flange 54 may define a hole 56. As set forth below, the
airbag assembly 16 may include a tab 58 engaged with the hole 56 of
the flange 54 by a fastener 72. The fastener 72, for example, may
be any suitable type of fastener such as a threaded bolt, rivet,
etc.
[0023] The fuel tank 14 may be formed of any suitable material,
e.g., metal such as steel, aluminum, etc. Alternatively, the fuel
tank 14 may be formed of an engineered plastic, e.g., high-density
polyethylene (HDPE). The fuel tank 14 may have any suitable
cross-sectional shape, for example, rectangular (FIGS. 1-5),
square, oval, circular, etc. The fuel tank 14 may have any suitable
three-dimensional shape, for example, cube, elongated cube,
cylindrical, sphere, etc. The fuel tank 14 may include two separate
halves that are formed separately from, for example, a stamped
process and may be subsequently fixed together by, e.g., welding,
brazing, etc.
[0024] The fuel tank 14 may be of any suitable type for storing any
suitable fuel/energy source. For example, the fuel tank 14 may
store petrochemical fuels such as gasoline, diesel, etc. As another
example, the fuel tank 14 may store a rechargeable battery, fuel
cell, hydrogen tank, natural gas tank, etc.
[0025] The airbag assembly 16 may include one or more inflatable
members 30 inflatable by the inflation medium. The airbag assembly
16 shown in the Figures includes one inflatable member 30, however,
the airbag assembly 16 may include any suitable number of
inflatable members 30.
[0026] The inflatable member 30 in an inflated position may extend
continuously across one or more portions of the fuel tank 14, i.e.
the first portion 18, the second portion 20, the rear portion 22,
and/or the front portion 50 of the fuel tank 14. The inflatable
member 30 may further extend across a left front corner 74 joining
the first portion 18 and the front portion 50, and/or a right front
corner 76 joining the second portion 20 and the front portion 50,
and/or a left rear corner 78 joining the first portion 18 and the
rear portion 22, and/or a right rear corner 80 joining the second
portion 20 and the rear portion 22 as shown in FIGS. 3-4.
[0027] Alternatively, in the configuration where the airbag
assembly 16 includes more than one inflatable member 30, each
inflatable member 30 may extend across one or more of the first
portion 18, the second portion 20, the rear portion 22, and/or the
front portion 50 of the fuel tank 14. These individual inflatable
members 30 may be fluidly connected to each other, or may be
independently inflatable by the inflator 26.
[0028] With reference to FIGS. 1 and 5, the airbag assembly 16 may
include an inflatable member 30 and an outer covering 60 on the
inflatable member 30. The outer covering 60 houses the inflatable
member 30 when the inflatable member 30 is in an uninflated
position. The inflatable member 30 in the uninflated position may
be, for example, folded, rolled, etc. within the outer covering 60.
The outer covering 60 may include a tear seam (not shown) that may
provide an inflate direction for the inflatable member 30 to
inflate. The inflatable member 30 may tear the tear seam when the
inflatable member 30 inflates from the uninflated position to the
inflated position. When the tear seam tears, the inflatable member
30 may be exposed outside the outer covering 60 as shown in FIGS.
2-4.
[0029] The outer covering 60 may be formed of any suitable
material. Specifically, the outer covering 60 may be configured to,
i.e., sized, shaped, material, etc., protect the inflatable member
30 from driving conditions when the inflatable member 30 is in the
uninflated position. The outer covering 60 may be, for example,
formed of nylon, polyester, etc.
[0030] With reference to FIGS. 2-5, the inflatable member 30 may be
formed of an auxetic material. For example, the auxetic material
may include auxetic yarns that may be combined with other yarns and
fibers to optimize the performance, e.g., puncture resistance, tear
resistance, of the auxetic material. As another example, the
inflatable member 30 may be formed from an ultra-high molecular
weight polyethylene (UHMwPE) material. For example, the fibers of
the UHMwPE material may be oriented in a particular pattern to
optimize the performance, e.g., puncture resistance, tear
resistance, of the UHMwPE material.
[0031] The inflatable member 30 may be unvented for the purpose of
containing the inflation medium within the inflatable member 30 for
a period of time, for example, greater than one second.
[0032] As set forth above, the airbag assembly 16 extends across at
least one of the first portion 18, the second portion 20, the rear
portion 22 and/or the front portion 50 of the fuel tank 14 in the
inflated position. Specifically, the airbag assembly 16 may be
connected directly to the first portion 18, the second portion 20,
the rear portion 22, and/or the front portion 50. Alternatively,
the airbag assembly 16 may be connected to another component of the
fuel tank 14.
[0033] The airbag assembly 16 may, for example, include tabs 58
connected to and spaced along the inflatable member 30, as shown in
FIG. 5. The tabs 58 may extend through the outer covering 60. The
tabs 58 may be connected to the inflatable member 30 in any
suitable manner, e.g., stitching, bonding, and/or adhesive, etc.
The tabs 58, for example, may be connected to the first portion 18,
the second portion 20, the rear portion 22, and/or the front
portion 50 of the fuel tank 14. As another example, the tabs 58 of
the inflatable member 30 may be connected to the top portion 52 of
the fuel tank 14. In this configuration, the inflatable member 30
in the inflated position may extend across the first portion 18,
the second portion 20, the rear portion 22, and/or the front
portion 50 of the fuel tank 14.
[0034] Specifically, the top portion 52 may support the airbag
assembly 16 around a perimeter 62 of the top portion 52. In such a
configuration, during a vehicle impact, the inflatable member 30 of
the airbag assembly 16 may inflate from the uninflated position to
the inflated position. In this inflated position, the inflatable
member 30 may extend from the top portion 52 across the first
portion 18, the second portion 20, the rear portion 22 and/or the
front portion 50 of the fuel tank 14.
[0035] A schematic of the impact absorbing system 24 which includes
an impact sensing system 64, the inflator 26, and the airbag
assembly 16 is shown in FIG. 6. The impact sensing system 64 may
include at least one sensor 66 for sensing impact of the vehicle
12, and a controller 68 in communication with the sensor 66 and the
inflator 26 for activating the inflator 26, e.g., for providing an
impulse to a pyrotechnic charge of the inflator 26, when the sensor
66 senses an impact of the vehicle 12. Alternatively or
additionally to sensing impact, the impact sensing system 64 may be
configured to sense impact prior to impact, i.e., pre-impact
sensing. The sensor 66 may be of any suitable type, e.g., using
radar, lidar, and/or a vision system. The vision system may include
one or more cameras, CCD image sensors, and/or CMOS image sensor,
etc.
[0036] The controller 68 may be a microprocessor-based controller.
The sensor 66 is in communication with the controller 68 to
communicate data to the controller 68. Based on the data
communicated by the sensor 66, the controller 68 instructs the
inflator 26 to activate. The impact sensing system 64 may instruct
the inflator 26 to activate on either a front end impact, a rear
end impact, or a side impact of the vehicle.
[0037] The controller 68 and the sensor 66 may be connected to a
communication bus 70, such as a controller area network (CAN) bus,
of the vehicle 12. The controller 68 may use information from the
communication bus 70 to control the activation of the inflator 26.
The inflator 26 may be connected to the controller 68, as shown in
FIG. 6, or may be connected directly to the communication bus
70.
[0038] In operation, the airbag assembly 16 is in the uninflated
position, as shown in FIGS. 1 and 5, under normal operating
conditions of the vehicle 12. When the sensor 66 senses an impact
of the vehicle 12, the impact sensing system 64 triggers the
inflator 26 to inflate the inflatable member 30 of the airbag
assembly 16 with the inflation medium from the uninflated position
to the inflated position. In particular, based on the type of
impact sensed by the impact sensing system 64, the impact sensing
system 64 inflates the inflatable member 30 to the inflated
position as shown in FIGS. 2-4.
[0039] The disclosure has been described in an illustrative manner,
and it is to be understood that the terminology which has been used
is intended to be in the nature of words of description rather than
of limitation. Many modifications and variations of the present
disclosure are possible in light of the above teachings, and the
disclosure may be practiced otherwise than as specifically
described.
* * * * *