CN114572145B

CN114572145B - Safety airbag, vehicle and control method

Info

Publication number: CN114572145B
Application number: CN202210288315.5A
Authority: CN
Inventors: 陈宏民; 王成磊; 尹刚; 周大永; 王鹏翔; 吕茂奇; 赵智林; 汪长军; 艾广美; 尹科伦
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-11-15
Anticipated expiration: 2042-03-22
Also published as: CN114572145A

Abstract

The invention discloses a safety airbag, a vehicle and a control method, wherein the safety airbag comprises an airbag, a point explosion generator and a driving module, the airbag comprises a main air cavity and a three-dimensional air cavity, and the main air cavity is provided with a plugging piece; in an unfolded state, the main air cavity is arranged on one side, facing the seat, of the steering wheel hub, and the three-dimensional air cavity is arranged on the periphery of the steering wheel hub; the point explosion generator is communicated with the main air cavity; the driving module is connected with the plugging piece. The vehicle includes the airbag described above. The control method comprises the steps that when the steering wheel is in a conventional state, the airbag control module controls a point explosion generator to act; when the airbag is in a folded state, the airbag control module controls the point explosion generator and the driving module to act simultaneously. The invention relates to the field of vehicle safety, and provides an air bag, a vehicle and a control method, wherein the size of the air bag can be changed according to the folding condition of a steering wheel to ensure the support of the air bag, a self-adaptive structure is formed, and the problem of safety protection of a driver when the steering wheel is in a folding state or an unfolded state is solved.

Description

Safety airbag, vehicle and control method

Technical Field

The present disclosure relates to vehicle safety, and more particularly to an airbag, a vehicle, and a control method.

Background

Automobile design increasingly focuses on experience of users, such as perception of space, perception of human-computer interaction, convenience, practicality, safety, comfort and the like. The reason for the generation of the steering wheel with the foldable direction is to enable a driver to experience more driving space, more comfort and higher technology. At present, the safety airbag and the safety belt still cannot be opened for protecting the driver by the vehicle, and the protection design aiming at the airbag of the driver on the folding steering wheel needs to take into account the protection of the driver in the state before the steering wheel is folded and the protection of the driver in the state after the steering wheel is folded. When the steering wheel is unfolded, the air bag of the safety air bag after being unfolded can be effectively supported by means of the rim of the steering wheel, so that the problem of the unfolding stability of the air bag is well solved; when the steering wheel is in a folded state, the upper half part and the lower half part of the rim of the steering wheel are folded, the traditional safety airbag for the driver is lack of the support of the rim of the steering wheel, the airbag can have a stable posture which can not be maintained after the human body impacts the airbag and the airbag has no support of the rim of the steering wheel, and the stable and effective protection can not be provided for the driver.

Disclosure of Invention

The application provides an air bag is applied to folding steering wheel, the steering wheel includes steering wheel hub and folding steering wheel rim, the steering wheel has fold condition and conventional state under fold condition the steering wheel rim is buckled and is packed up, air bag has the state of expansion, air bag includes:

the air bag comprises a main air cavity and a three-dimensional air cavity, the main air cavity is communicated with the three-dimensional air cavity through a first air inlet hole, and the main air cavity is provided with a plugging piece for plugging the first air inlet hole so as to prevent the air in the main air cavity from flowing to the three-dimensional air cavity; in an unfolded state, the main air cavity is arranged on one side, facing a seat, of the steering wheel hub, and the three-dimensional air cavity is arranged on the periphery of the steering wheel hub so as to be supported on the steering wheel hub;

a detonation generator disposed in communication with the primary air chamber for inflating the air bag;

and the driving module is connected with the plugging piece and used for driving the plugging piece to be separated from the first air inlet.

One possible design further comprises an air bag control module, wherein the air bag control module is electrically connected with the point explosion generator and the driving module respectively and used for controlling the point explosion generator and the driving module to act.

One possible design is that the cavity wall of the main air cavity is provided with an exhaust hole for communicating with the outside, and the main air cavity is provided with an air quantity adjusting mechanism at the exhaust hole for reducing the exhaust quantity of the exhaust hole;

the driving module is connected with the air quantity adjusting mechanism and is set to drive the air quantity adjusting mechanism to act.

In a possible design, the driving module includes an ignition torch and an air intake pull belt, the blocking piece is provided as a first gasket, the first gasket is fixed on the cavity wall of the main air cavity through a weakened sewing line, and the output end of the ignition torch is connected with the blocking piece through the air intake pull belt so as to pull the first gasket to get rid of the constraint of the weakened sewing line after ignition.

One possible design is that the air flow adjusting mechanism comprises a second gasket and an exhaust pull belt, wherein one end of the second gasket is fixed on the cavity wall of the main air cavity through a reinforced sewing thread, and the other end of the second gasket is connected with the ignition torch through the exhaust pull belt; the second gasket is provided with a variable air hole, and the opening area of the variable air hole is smaller than that of the exhaust hole;

the second gasket comprises a bending state and a flat state, and in the flat state, the second gasket covers the exhaust hole, and the variable air hole corresponds to the exhaust hole; in the bent state, the second gasket is arranged on one side of the exhaust hole and is folded into a preset shape;

the ignition torch is arranged to pull the second gasket to be switched from the bent state to the flat state.

In one possible design, the air flow adjusting mechanism further includes a pre-sewing thread, and the pre-sewing thread is disposed on the second gasket to maintain the bent state.

In one possible embodiment, the exhaust hole is provided in plurality, and at least one exhaust hole is provided with the air volume adjusting mechanism.

In one possible design, the three-dimensional air cavities are provided in plurality and are all communicated with the main air cavity through the first air inlet holes.

The application provides a vehicle, including collision sensor and automobile body controller, still include foretell air bag, automobile body controller and collision sensor respectively with the gasbag control module electricity is connected, automobile body controller sets up to discernment the state of steering wheel, collision sensor set up to when the vehicle bumps to gasbag control module sends collision signal.

The present application provides a control method applied to the vehicle described above, including:

when the automobile body controller identifies that the steering wheel is in a normal state, a non-folding signal is sent to the airbag control module, the collision signal and the non-folding signal form a first trigger signal, and the airbag control module controls the point explosion generator to act according to the first trigger signal;

the automobile body controller identifies that when the steering wheel is in a folded state, the automobile body controller sends a folding signal to the air bag control module, the collision signal and the folding signal form a second trigger signal, and the air bag control module controls the point explosion generator and the driving module to act simultaneously according to the second trigger signal.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.

Drawings

The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.

FIG. 1 is a schematic view of a conventional state of a steering wheel;

FIG. 2 is a schematic view of the steering wheel of FIG. 1 in a folded state;

FIG. 3 is a schematic view showing a deployed state of an airbag according to an embodiment of the present application;

FIG. 4 is a first schematic view of the closure of FIG. 3 in assembled relation with the first intake port;

FIG. 5 is a second schematic view of the closure of FIG. 3 assembled with the first intake port;

FIG. 6 is a schematic view of the air bag of FIG. 3;

FIG. 7 is a first schematic view of the second gasket of FIG. 6 in a flat condition;

FIG. 8 is a second schematic view of the second pad of FIG. 6 in a flat condition;

FIG. 9 is a first schematic view of the second gasket of FIG. 6 in a bent state;

FIG. 10 is a second view of the second gasket of FIG. 6 in a bent state;

FIG. 11 is a schematic view of a vehicle according to an embodiment of the present application;

fig. 12 is a schematic diagram of a control method according to an embodiment of the present application.

The reference numbers illustrate:

100-steering wheel, 101-steering wheel hub, 102-steering wheel rim, 200-air bag, 201-main air cavity, 202-three-dimensional air cavity, 203-lower air sheet, 204-first air inlet hole, 205-air outlet hole, 300-blocking piece, 301-first gasket, 302-reinforced sewing line, 303-weakened sewing line, 400-driving module, 401-ignition torch, 402-ignition torch, 500-air quantity adjusting mechanism, 501-second gasket, 502-exhaust pull belt, 503-variable air hole, 504-pre-sewing line, 600-air bag control module, 700-collision sensor, 800-automobile body controller and 900-point explosion sounder.

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

At present, in related safety devices for vehicles, namely, a conventional driver airbag is adopted on a foldable steering wheel, but when the airbag is unfolded, the airbag lacks the support of a rim of the steering wheel, and after a human body impacts the airbag, the airbag can be deviated, the stable posture can not be maintained, and the stable and effective protection can not be provided for a driver.

Referring to fig. 1 to 12, an airbag according to an embodiment of the present invention is applied to a foldable steering wheel 100, the steering wheel 100 includes a steering wheel hub 101 and a foldable steering wheel rim 102, and the steering wheel 100 has a folded state in which the steering wheel rim 102 is folded and retracted and a normal state. The airbag has a deployed state, and specifically, the airbag includes: the gas bag 200, the detonation generator 900 and the driving module 400, wherein the gas bag 200 comprises a main gas cavity 201 and a three-dimensional gas cavity 202, the main gas cavity 201 and the three-dimensional gas cavity 202 are communicated through a first gas inlet hole 204, the main gas cavity 201 is provided with a blocking piece 300 for blocking the first gas inlet hole 204, and the blocking piece 300 can prevent the gas of the main gas cavity 201 from flowing to the three-dimensional gas cavity 202. In the deployed state, the main air chamber 201 is provided on the seat-facing side of the steering wheel hub 101, and the stereo air chamber 202 is provided on the outer periphery of the steering wheel hub 101. The dot burst generator 900 is disposed to communicate with the main gas chamber 201 and inflates the airbag 200. The driving module 400 is connected to the plugging member 300, and can drive the plugging member 300 to separate from the first air inlet 204. Therefore, the safety airbag solves the safety protection of a driver when the foldable steering wheel is in a folding state and an unfolded state (a conventional state) through a self-adaptive structure, and eliminates the problem of injury to the driver when the airbag is matched with the unfolded steering wheel.

As shown in fig. 1 and 2, the steering wheel 100 is foldable to increase the space in the vehicle and improve the comfort, and is suitable for the vehicle capable of automatic driving, wherein the steering wheel 100 comprises a steering wheel hub 101 and a steering wheel rim 102, the steering wheel hub 101 is arranged in the center, the steering wheel rim 102 is arranged at the periphery of the steering wheel hub 101 and is connected with the steering wheel hub 101 through spokes, and particularly, the steering wheel rim 102 can be bent towards the side of the steering wheel hub 101 facing away from the driver's seat. Thus, when the steering wheel rim 102 is unfolded and enclosed in a ring shape, the steering wheel 100 is in a normal state (unfolded state), and when the steering wheel rim 102 is folded, the steering wheel 100 is in a folded state. The airbag 200, in the stored state, may be disposed in the steering wheel hub 101 together with the squib generator 900 and the driving module 400, without affecting the driver's operation of the steering wheel 100.

As shown in fig. 3 to 6, the air bag 200 is a single body, and its interior is partitioned by its fabric into a main air chamber 201 and a three-dimensional air chamber 202. In the airbag deployment state and the steering wheel 100 is in the folded state, the main air chamber 201 and the three-dimensional air chamber 202 are filled with air, the main air chamber 201 is located on the seat-facing side of the steering wheel hub 101, the three-dimensional air chamber 202 is located on the periphery of the steering wheel hub 101, and the steering wheel hub 101 can provide support for the three-dimensional air chamber 202 to prevent the air bag 100 from shaking. The air bag 200 has a lower air flap 203, and the lower air flap 203 constitutes a chamber wall that separates the main air chamber 201 and the three-dimensional air chamber 202 and a chamber wall of the main air chamber 201 adjacent to the steering wheel hub 101. The cavity wall of the main air cavity 201, specifically, the lower air sheet 203 is provided with a second air inlet hole (not shown in the figure), which is communicated with the ignition generator 900, and can introduce air into the main air cavity 201 when the ignition generator 900 operates. The first air inlet hole 204 is disposed on the cavity wall separating the main air cavity 201 and the three-dimensional air cavity 202, and the first air inlet hole 204 is a circular hole, but is not limited thereto, and may be a square hole or the like. The plurality of stereo air chambers 202 are uniformly arranged around the circumference of the steering wheel hub 101, and are all communicated with the main air chamber 201 through at least one first air inlet hole 204, but not limited thereto, for example, the stereo air chambers 202 are one and annular, the stereo air chambers 202 surround the circumference of the steering wheel hub 101, and the annular stereo air chambers 202 are communicated with the main air chamber 201 through at least one first air inlet hole 204. From the above, in the unfolded state of the air bag 200, there are two cases due to the blocking piece 300, one of which is that only the main air cavity 201 is filled with air under the action of the blocking piece 300, which is suitable for the steering wheel 100 in the unfolded state, and both the steering wheel hub and the rim of the steering wheel can support the air bag 200, so as to ensure the stable support; in another case where the blocking member 300 does not have a blocking function, and the main air chamber 201 and the three-dimensional air chamber 202 are filled with air, the case is suitable for the steering wheel 100 in a folded state, and the steering wheel hub 101 of the steering wheel can support the main air chamber 201 of the air bag 200, and the three-dimensional air chamber 202 is supported on the steering wheel hub 101, so that a small amount of spatial movement of the air bag 200 can be ensured, and the air bag 200 can be stabilized in the folded state.

As shown in fig. 3 to 6 and fig. 11, the driving module 400 includes an ignition torch 401 and an air intake pull tape 402, the blocking element 300 is a first spacer 301, and the first spacer 301 is also circular and has a diameter larger than that of the first air intake hole 204, so that the first air intake hole 204 can be covered by the first spacer 301, but the first spacer 301 is not limited to be circular and may have other shapes, so long as the first air intake hole 204 can be covered by the first spacer 301. The first gasket 301 is fixed on the cavity wall of the main air cavity 201 through the weakened sewing line 303, and the weakened sewing line 303 surrounds the circumference to form a ring shape, so that the first gasket 301 covers the first air inlet hole 204 and ensures sealing, and the gas in the main air cavity 201 is prevented from flowing to the three-dimensional air cavity 202, but not limited to the fact that the weakened sewing line 303 surrounds the ring shape, and the first gasket 301 can be fixed relatively and sealed. One end of the air inlet pulling belt 402 is connected with a torch 401, the other end of the air inlet pulling belt 402 is connected with the first gasket 301, and after the torch 401 is ignited, the air inlet pulling belt 402 can be pulled to be away from the air bag 200, so that the first gasket 301 is separated from the first air inlet hole 204. In the separation process, the weakened sewing line 303 is easily damaged by external force, and the air inlet pull belt 402 can damage the weakened sewing line 303 so that the first gasket 301 is separated from the constraint of the weakened sewing line 303. In addition, one end of the first gasket 301 is fixed on the cavity wall of the main air cavity 201 through a reinforced sewing thread 302, and the other end is connected with the exhaust pull tape 402, so that the strength of the reinforced sewing thread 302 is high, and the first gasket can bear the tensile force of the intake pull tape 402 and cannot be damaged.

As shown in fig. 6 to 11, the cavity wall (the lower air plate 203) of the main air cavity 201 is provided with two air vents 205 for communicating with the outside, and the number of the air vents 205 is two, but not limited thereto, for example, the air vents 205 are square holes, or the number of the air vents 205 is one or more than two. The air volume adjusting mechanism 500 is disposed at the air outlet 205 of the main air chamber 201, so as to reduce the air volume exhausted by the air outlet 205, and the driving module 400 is also connected to the air volume adjusting mechanism 500, so as to drive the air volume adjusting mechanism 500 to operate. Specifically, the air quantity adjusting mechanism 500 includes a second gasket 501 and an exhaust pull belt 502, the second gasket 501 is circular, but is not limited thereto, and may be, for example, rectangular, and the like, the second gasket 501 is centrally provided with a variable air hole 503, the variable air hole 503 is a circular hole, the opening area of the circular hole is smaller than the opening area of the exhaust hole 205, and the size of the circular hole can be set according to the requirements of the air intake quantity and the size of the airbag, and the like. One end of the second gasket 501 is fixed on the cavity wall of the main air cavity 201 through a reinforced sewing thread 302, and the other end of the second gasket 501 is movably connected to the output end of the ignition torch 401 through an exhaust pull belt 502 or connected to an intake pull belt 402, so that the second gasket 501 can be pulled to change in shape after the ignition torch 401 is ignited. The second gasket 501 includes a bent state and a flat state, in the flat state, the second gasket 501 covers the vent hole 205, the variable vent hole 503 corresponds to the vent hole 205, the reinforced sewing thread 302 limits one end of the second gasket 501, and the vent pull tape 502 pulls the other end of the second gasket 501, so that the second gasket 501 is flattened to cover the upper vent hole 205, and the smaller variable vent hole 503 can reduce the air output. In the bent state, the second gasket 501 is bent and placed on one side of the air outlet 205, that is, the side where the reinforced sewing thread 302 is fixed, and the second gasket 501 is folded into a rectangle, but is not limited thereto, and may be folded into other shapes, and meanwhile, in the bent state, the pre-sewing thread 504 is sewn on the second gasket 501, so that the second gasket 501 is kept in the bent state, and the strength of the pre-sewing thread 504 is limited. Therefore, after the ignition torch 401 is ignited, the exhaust pull belt 502 can be pulled to move towards the ignition torch 401, so that the pre-sewing thread 504 is damaged, the second gasket 501 is pulled flat, the exhaust hole 205 is covered, the second gasket 501 is switched from a bent state to a flat state, and the purpose of adjusting the pressure in the air bag 200 is achieved. In addition, the number of the gas discharge holes 205 is plural, and one gas discharge hole 205 may not be provided with the gas amount adjustment mechanism 500, and the other gas discharge holes 205 may be provided with the gas amount adjustment mechanism 500.

As shown in fig. 11 and 12, the present invention further includes an airbag control module 600 (ACU), and the airbag control module 600 (ACU) is electrically connected to the point burst generator 900 and the driving module 400, respectively, and can control the point burst generator 900 and the driving module 400 to operate, respectively. The action of the ignition generator 900 is to point the ignition generator 900 to ignite and inflate the airbag 200, and the action of the driving module 400 is to point the ignition torch 401 to ignite and pull the intake pull belt 402 and the exhaust pull belt 502.

In some exemplary embodiments, as shown in fig. 11 and 12, a vehicle may further include a crash sensor 700 and a body controller 800 (BCM, which is mainly used to coordinate operations of various functional components of a vehicle body through electrical signals, and the body controller may control electronic components including doors, windows, airbags, turn lamps, and wipers), in addition to the airbag described above, the body controller 800 and the crash sensor 700 may be electrically connected to the airbag control module 600, respectively, the body controller 800 may recognize a state of the steering wheel 100 and feed back the state to the airbag control module 600, and the crash sensor 700 may transmit a crash signal to the airbag control module 600 when the vehicle crashes.

In some exemplary embodiments, as shown in fig. 11 and 12, a control method, applied to the vehicle described above, includes: when the steering wheel 100 is in a normal state (unfolded state) and a vehicle is collided, the airbag control module 600 controls only the point burst generator 900 to operate; and, when the steering wheel 100 is in the folded state and the vehicle collides, the airbag control module 600 controls the point explosion generator 900 and the driving module 400 to operate simultaneously. Specifically, the body controller 800 may recognize the folding condition of the steering wheel 100 in real time, and input the folding condition of the steering wheel 100 to the airbag control module 600 (ACU) in real time, and when a vehicle encounters a severe collision, the collision sensor 700 sends a collision signal to the airbag control module 600, and in the case of an airbag being accommodated, the first gasket 301 covers the first intake hole 204, and the second gasket 501 is in a bent state. When the steering wheel 100 collides when being unfolded, the automobile body controller 800 sends an unfolded signal to the airbag control module 600, the unfolded signal and the collision signal form a first trigger signal, the airbag control module 600 judges that the igniter generator 900 needs to be ignited according to the first trigger signal, the igniter generator 900 is controlled to rapidly inflate the main air cavity 201 (at this time, the first gasket 301 seals the first air inlet 204, the three-dimensional air cavity 202 is not inflated, and the second gasket 501 is in a bent state), and the air bag 200 is effectively supported through the rim of the steering wheel to protect the safety of a driver. When the steering wheel 100 is folded, the vehicle body controller 800 sends a folding signal to the airbag control module 600, the folding signal and the collision signal form a second trigger signal, the airbag control module 600 judges that both the ignition generator 900 and the ignition torch 401 need to be ignited according to the second trigger signal, the ignition generator 900 is controlled to rapidly inflate the main air cavity 201, the ignition torch 401 pulls the air inlet pull belt 302 and the air outlet pull belt 502, the air inlet pull belt 302 pulls the first gasket 301 to be separated from the first air inlet 204, and the air outlet pull belt 502 pulls the second gasket 501 to be switched to a flat state. At this time, the first air inlet hole 204 is opened, so that air can be flushed into the three-dimensional air cavity 202 to form an adaptive functional air bag of a three-dimensional air bag structure, the air bag is supported on the steering wheel hub 101 through the three-dimensional air cavity 202 to play a role in stabilizing the state of the air bag 200, and meanwhile, the smaller variable air hole 504 replaces the exhaust hole 205 to become an air outlet of the air bag 200, so that the air outlet amount is reduced, the pressure in the air bag is ensured to be stable, and a driver is effectively protected.

According to the airbag, the size and the shape of the airbag can be changed according to the folding condition of the steering wheel to ensure the support of the airbag, so that a self-adaptive structure is formed, the safety protection of a driver when the foldable steering wheel is in a folding state or a non-folding state is solved, and the problem of injury to the driver when the airbag is matched with the non-folding steering wheel is solved. Meanwhile, the air volume adjusting mechanism can reduce the air displacement of the vent hole, namely the size of the vent hole is reduced, and the pressure in the air bag is stable, so that a driver is effectively protected. Therefore, the safety airbag not only has a self-adaptive structure, but also can adjust the air quantity of the air bag through the air quantity adjusting mechanism, so that the safety of a driver is effectively ensured on the basis of adapting to the foldable steering wheel.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. An air bag for use with a foldable steering wheel, the steering wheel including a steering wheel hub and a foldable steering wheel rim, the steering wheel having a folded state and a normal state, the steering wheel rim being folded for stowing under the folded state, the air bag having an expanded state, the air bag comprising:

a dot detonation generator disposed in communication with the primary air chamber for inflating the air bag;

and the driving module is connected with the plugging piece and used for driving the plugging piece to be separated from the first air inlet hole.

2. The airbag of claim 1, further comprising an airbag control module electrically connected to the point explosion generator and the drive module, respectively, for controlling the point explosion generator and the drive module to operate.

3. The airbag of claim 2, wherein the wall of the main air cavity is provided with an exhaust hole for communicating with the outside, and the main air cavity is provided with an air quantity adjusting mechanism at the exhaust hole for reducing the exhaust quantity of the exhaust hole;

4. The airbag of claim 3, wherein the driving module comprises an ignition torch and an air inlet pull tape, the blocking piece is provided as a first gasket, the first gasket is fixed on the cavity wall of the main air cavity through a weakened sewing line, and the output end of the ignition torch is connected with the blocking piece through the air inlet pull tape so as to pull the first gasket to get rid of the weakened sewing line after ignition.

5. The airbag of claim 4, wherein the air quantity adjusting mechanism comprises a second gasket and an exhaust pull belt, one end of the second gasket is fixed on the cavity wall of the main air cavity through a reinforced sewing thread, and the other end of the second gasket is connected with the ignition torch through the exhaust pull belt; the second gasket is provided with a variable air hole, and the opening area of the variable air hole is smaller than that of the exhaust hole;

6. The airbag of claim 5, wherein the air amount adjustment mechanism further comprises a pre-sewing thread provided on the second pad to maintain the bent state.

7. The airbag according to claim 5, wherein the vent hole is provided in plurality, and at least one of the vent holes is provided with the air amount adjusting mechanism.

8. The airbag according to any one of claims 1 to 7, wherein the three-dimensional air chamber is provided in plurality, and the plurality of three-dimensional air chambers are all communicated with the main air chamber through the first air intake holes.

9. A vehicle comprising a crash sensor and a body controller, further comprising an airbag according to claim 3, the body controller and crash sensor being respectively electrically connected to the airbag control module, the body controller being arranged to identify the condition of the steering wheel, the crash sensor being arranged to signal a crash to the airbag control module in the event of a vehicle crash.

10. A control method, applied to a vehicle according to claim 9, comprising: