Double-chamber seat side safety airbag control system

Abstract

The invention relates to the technical field of vehicle passive safety, and provides a double-chamber seat side safety airbag control system which comprises a double-chamber airbag body, a gas generator, a control module and a signal acquisition module. The signal acquisition module acquires signals of the collision sensor, the passenger detection sensor and the vehicle body stabilizing system; the control module judges the information acquired by the signal acquisition module and sends an instruction to the gas generator; a gas guide piece is arranged at a gas outlet of the gas generator, after the gas generator receives an ignition instruction, high-pressure inert gas is instantly generated, and the high-pressure inert gas is guided into the double-cavity gas bag body through the gas guide piece; the double-chamber airbag body comprises two independent chambers which are distributed up and down, the two independent chambers are divided into a first chamber and a second chamber, a plurality of internal exhaust holes are formed in the boundary of the first chamber and the second chamber, and gas intercommunication and pressure adjustment are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle passive safety, in particular to a double-chamber seat side airbag control system. BACKGROUND

[0002] With the continuous upgrading of vehicle safety standards (such as the 2024 version of C-NCAP), higher requirements are put forward for the all-around and precise protection of passengers. As the core passive safety device in vehicle side collision, the protection performance of seat side airbag directly affects the risk of passenger casualties. At present, the existing seat side airbag mostly adopts a single-chamber structure, which has the following technical defects: Uneven protection: The single-chamber adopts a unified inflation pressure and deployment posture, which cannot adapt to the protection needs of different parts of the passenger's head, shoulders, torso, waist, etc., and is prone to problems such as insufficient head protection and excessive waist pressure, increasing the risk of passenger brain injury and spinal injury.

[0003] Unstable deployment posture: The single-chamber is easily affected by the collision conditions and gas flow rate when it is deployed, and may appear to be tilted, wrinkled, and offset, etc. It cannot stably fit the passenger's body curve, especially in severe conditions such as side column collision and high-speed side collision, the protection effect is greatly reduced, and even the passenger may be caused secondary injury due to airbag offset.

[0004] Poor adaptability: The single-chamber structure is fixed and cannot adapt to the protection needs of different seat models and different body types of passengers. It also has poor compatibility with the lightweight demand of new energy vehicles, seat heating / ventilation additional functions, and insufficient universality. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a double-chamber seat side airbag control system to solve the problems in the background art.

[0006] In order to achieve the above purpose, the present application provides a double-chamber seat side airbag control system, characterized in that it comprises a double-chamber airbag body, a gas generator, a control module, and a signal acquisition module. The signal acquisition module acquires signals from the collision sensor, the passenger detection sensor, and the vehicle body stability system; The control module determines the information collected by the signal acquisition module and sends instructions to the gas generator; The generator support is provided with a gas guide at the gas outlet of the gas generator. After the gas generator receives the ignition instruction, it instantaneously generates high-pressure inert gas, which is introduced into the double-chamber airbag body through the gas guide; The double-chamber airbag body comprises two independent chambers distributed above and below, which are divided into a first chamber and a second chamber. The first chamber and the second chamber are provided with a plurality of internal exhaust holes at the dividing line to realize gas communication and pressure regulation.

[0007] Preferably, the signal acquisition module continuously monitors whether the vehicle has a side collision, rollover and other sudden conditions, and collects the body size and seating position information of the occupant, providing data support for subsequent judgment and control.

[0008] Preferably, the control module determines that when the collision intensity detected by the collision sensor reaches a preset threshold and the control module confirms that the collision direction is lateral, the ignition instruction is triggered immediately, and the inflation parameters are adjusted in combination with the occupant information; if the threshold is not reached or it is not a lateral collision, it is not triggered to avoid misoperation.

[0009] Preferably, the gas of the gas generator first flows into the first chamber through the internal exhaust hole, so that it is quickly deployed and adheres to the occupant's body, and then the gas flows into the second chamber, completing the overall deployment.

[0010] Preferably, after the deployment of the double-chamber airbag body, the differential force and pressure adjustment of the two independent chambers are realized to achieve staged buffering protection. Preferably, the first chamber buffers the initial impact force of the vehicle intrusion, absorbs the collision energy, and reduces the direct extrusion on the occupant; the second chamber adheres to the occupant's body, restricts the lateral deviation of the occupant, avoids the collision between the occupant's head, torso and the vehicle structure, and other occupants, and slowly releases the gas through the internal exhaust hole to continuously buffer the collision impact force until the impact force is completely dissipated.

[0011] Preferably, the control module monitors the state of the gas generator in real time, detects through a fault self-checking module, and transmits information to the vehicle instrument panel.

[0012] Preferably, the double-chamber airbag body is sewn from high-strength flame-retardant nylon fabric, and the surface of the fabric is treated with an anti-gas leakage coating.

[0013] Preferably, the gas generator is installed in the double-chamber airbag body through a generator support, the generator support extends out of the double-chamber airbag body and is sealed and fixed to the outside of the frame side wall of the seat back side through a connecting fastener.

[0014] The beneficial effects of the present application are: 1. More accurate protection and lower risk of injury and death: The double-chamber differential design can accurately allocate inflation pressure and buffering force according to the protection needs of different parts of the occupant's head, shoulders, torso and waist, avoiding the protection defects of single-chamber airbags; the first chamber is deployed before the second chamber, which can quickly restrain the occupant in the early stage of collision and reduce the lateral deviation amplitude, especially in severe conditions such as side column collision and high-speed side collision, the protection effect is outstanding, which can effectively reduce the injury rate of the occupant and meet the upgrading requirements of the 2024 version of C-NCAP for occupant protection in side collision.

[0015] 2. Deployment is more stable, avoiding secondary injury: through the coordinated design of the internal exhaust hole and the generator support assembly, the double-chamber can achieve uniform and orderly deployment, avoiding problems such as tilting, wrinkling, and deviation that may occur during the deployment of a single-chamber airbag, ensuring that the airbag always conforms to the body curve of the occupant; the staged inflation design can avoid impact injury to the occupant caused by rapid inflation and high pressure, and the slow release of gas can continuously absorb collision energy, combined with the application of high-strength fabric and sealing coating to prevent the airbag from rupturing instantly during a collision, providing double protection for stability and solving the pain points of traditional seat side airbags lacking support and being prone to tilting.

[0016] 3. Wide adaptability and strong versatility: the double-chamber structure can be flexibly adapted to the seat design of different types of vehicles, and can adjust the chamber volume, layout form, and installation position according to the seat size and shape, without the need for significant modification of the seat structure; it can be compatible with occupants of different body types, and through the occupant detection function of the control module, the inflation parameters can be adjusted to achieve personalized protection.

[0017] 4. High reliability and convenient maintenance: the control module has a fault self-checking function, which can monitor the working state of the airbag, inflator, and sensor in real time, and feedback any faults to the vehicle instrument panel in a timely manner to remind the user to repair, ensuring that the device is in an effective working state for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only illustrate the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0019] Figure 1 is the system framework diagram of the present application; Figure 2 is the assembly diagram of the double-chamber airbag body and the gas generator of the present application; Figure 3 is the exploded view of the double-chamber airbag body and the gas generator of the present application; Figure 4 is the schematic view of the gas outlet of the gas generator of the present application.

[0020] The marks in the figure are: 1-double-chamber airbag body, 2-gas generator, 3-generator support, 4-gas guide, 5-wire harness. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present application more clear and explicit, the following will further describe the present application in combination with specific embodiments.

[0022] It should be noted that unless otherwise defined, technical terms or scientific terms used in the present application shall have the common meaning understood by one of ordinary skill in the art to which the present application pertains. The terms "first", "second", and similar terms used in the present application do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships can also change accordingly.

[0023] As shown in Figures 1-4 A dual-chamber seat side airbag control system includes a dual-chamber airbag body 1, a gas generator 2, a control module, and a signal acquisition module. The signal acquisition module acquires signals of a collision sensor, an occupant detection sensor, and a vehicle body stability system. The signal acquisition module continuously monitors whether the vehicle has a sudden working condition such as a side collision or a rollover, and acquires occupant size and seating position information, providing data support for subsequent judgment and control.

[0024] The control module determines the information acquired by the signal acquisition module to send a command to the gas generator. When the collision intensity detected by the collision sensor reaches a preset threshold value and the control module confirms that the collision direction is lateral, an ignition command is triggered immediately, and the inflation parameters are adjusted in combination with the occupant information. If the threshold value is not reached or it is not a lateral collision, it is not triggered to avoid misoperation. The control module monitors the state of the gas generator in real time, detects through a fault self-checking module, and transmits information to the vehicle instrument panel.

[0025] The control module is linked with the vehicle body stability system (ESP), the collision sensor, and the occupant detection sensor, and acquires vehicle driving state such as speed and attitude, collision signals such as collision direction and collision intensity, and occupant information such as occupant size and seating position in real time, accurately judges the collision working condition, controls the ignition timing and inflation amount of the gas generator, realizes the intelligent and differentiated deployment of the dual-chamber, and has a fault self-checking function. The working state of the airbag, the inflator, and the sensor can be monitored in real time, and the fault is fed back to the vehicle instrument panel in time to remind the user to repair and ensure that the device is in an effective working state for a long time.

[0026] The gas generator 2 is installed inside the dual-chamber airbag body 1 via a generator bracket 3. The generator bracket extends out of the dual-chamber airbag body and is sealed and fixed to the outer side wall of the frame on the side of the seat back via connecting fasteners. A gas guide 4 is provided at the gas outlet of the gas generator 2 on the generator bracket 3. After receiving the ignition command, the gas generator 2 instantly generates high-pressure inert gas, which is introduced into the dual-chamber airbag body 1 through the gas guide 3. The dual-chamber airbag body 1 includes two independent chambers distributed vertically. The dual-chamber airbag body is made of high-strength flame-retardant nylon fabric, and the surface of the fabric is treated with a leak-proof coating. The two independent chambers are divided into a first chamber and a second chamber. The first chamber and the second chamber have multiple internal exhaust holes at the boundary to realize gas communication and pressure regulation.

[0027] Gas generator 2, serving as the power source for airbag deployment, employs electronically controlled ignition and is adapted to the differentiated inflation requirements of the dual chambers. It comes in two types: a single-stage gas generator linkage type and a dual-stage gas generator independent type. After being assembled into the airbag's inner cavity, it is sealed and fixed to the outer side wall of the frame on the side of the seat back using fasteners, ensuring stable installation and smooth gas transmission. The core function of gas generator 2 is to instantly generate high-pressure inert gas, a mixture of argon and nitrogen, upon receiving the ignition signal from the control module during a collision. This gas is precisely introduced into the two chambers through gas guides, achieving graded and uniform chamber deployment. The deployment speed meets the protection time requirements for side impacts (typically ≤20ms), precisely matching the airbag fabric material and chamber volume to achieve dynamic pressure balance and prevent over-inflation or under-inflation of the airbag. The dual-stage gas generator independent type selected in this invention can independently control the ignition timing and inflation volume of the two inflators according to the collision intensity and occupant position, adapting to different collision conditions and occupant vital signs, thus improving the flexibility of protection.

[0028] Gas from gas generator 2 first flows into the first chamber through the internal exhaust port, causing it to quickly deploy and conform to the occupant's body. Then, the gas flows into the second chamber to complete the overall deployment. After the dual-chamber airbag body deploys, it achieves graded buffering protection through differentiated force and pressure adjustment in the two independent chambers. The first chamber buffers the initial impact force of the vehicle body intrusion, absorbs collision energy, and reduces direct compression of the occupant. The second chamber conforms to the occupant's body, restrains the occupant's lateral displacement, and prevents the occupant's head and torso from colliding with the vehicle body structure and other occupants. At the same time, it slowly releases gas through the internal exhaust port to continuously buffer the collision impact force until the impact force is completely dissipated. The dual-chamber differentiated design precisely distributes inflation pressure and cushioning force to meet the protection needs of different parts of the occupant's body, such as the head, shoulders, torso, and waist, avoiding the "one-size-fits-all" protection defects of single-chamber airbags. The first chamber deploys before the second chamber, which can quickly restrain the occupant in the early stages of a collision and reduce lateral displacement. Especially in severe conditions such as side pole collisions and high-speed side collisions, the protective effect is outstanding, which can effectively reduce the occupant injury rate and meet the upgraded requirements of the 2024 C-NCAP for occupant protection in side collisions. Through the design of the internal vent, the dual chambers can achieve uniform and orderly deployment, avoiding the problems of tipping, wrinkling, and displacement that are prone to occur when single-chamber airbags are deployed, ensuring that the airbag always conforms to the occupant's body curves. The staged inflation design can avoid the impact injury caused by excessively rapid inflation and excessive pressure. The slow release of gas can continuously absorb the collision energy. Combined with the application of high-strength fabrics and sealing coatings, it can prevent the airbag from rupturing instantly upon impact. This dual protection provides stability and solves the pain points of traditional seat side airbags, such as lack of support and easy tipping.

[0029] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and many other variations of different aspects of the invention as described above exist, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A dual-chamber seat side airbag control system, characterized in that, It includes a dual-chamber airbag body, a gas generator, a control module, and a signal acquisition module; The signal acquisition module collects signals from the collision sensor, occupant detection sensor, and vehicle stability system. The control module determines the information collected by the signal acquisition module and sends commands to the gas generator. The generator bracket is equipped with a gas guide at the gas outlet of the gas generator. After receiving the ignition command, the gas generator instantly generates high-pressure inert gas, which is then introduced into the dual-chamber airbag body through the gas guide. The dual-chamber airbag body includes two independent chambers distributed vertically. The two independent chambers are divided into a first chamber and a second chamber. Multiple internal exhaust ports are provided at the boundary between the first chamber and the second chamber to realize gas communication and pressure regulation.

2. The dual-chamber seat side airbag control system according to claim 1, characterized in that, The signal acquisition module continuously monitors whether the vehicle is involved in sudden situations such as side collisions or rollovers, and at the same time collects information on the occupants' body shape and seating position to provide data support for subsequent judgment and control.

3. The dual-chamber seat side airbag control system according to claim 2, characterized in that, The control module determines that when the collision intensity detected by the collision sensor reaches a preset threshold and the control module confirms that the collision direction is lateral, it immediately triggers an ignition command and adjusts the inflation parameters based on the occupant information. If the threshold is not reached or the collision is not lateral, it does not trigger the command to avoid misoperation.

4. The dual-chamber seat side airbag control system according to claim 2, characterized in that, The gas from the gas generator first flows into the first chamber through the internal exhaust port, causing it to quickly unfold and fit the occupant's body. Then, the gas flows into the second chamber to complete the overall unfolding.

5. The dual-chamber seat side airbag control system according to claim 4, characterized in that, After the dual-chamber airbag body is deployed, it achieves graded buffering protection through differentiated force and pressure adjustment in the two independent chambers.

6. The dual-chamber seat side airbag control system according to claim 5, characterized in that, The first chamber buffers the initial impact force of the vehicle body intrusion, absorbs collision energy, and reduces direct compression of the occupants; the second chamber fits against the occupants' bodies, restrains the occupants' lateral displacement, and prevents the occupants' heads and torsos from colliding with the vehicle body structure and other occupants. At the same time, it slowly releases gas through the internal exhaust vents to continuously buffer the impact force until the impact force is completely dissipated.

7. The dual-chamber seat side airbag control system according to claim 1, characterized in that, The control module monitors the status of its own gas generator in real time, performs self-checks through the fault self-check module, and transmits the information to the vehicle's dashboard.

8. The dual-chamber seat side airbag control system according to claim 1, characterized in that, The dual-chamber airbag body is made of high-strength flame-retardant nylon fabric, and the fabric surface is treated with an air-leakage-proof coating.

9. The dual-chamber seat side airbag control system according to claim 1, characterized in that, The gas generator is mounted in the dual-chamber airbag body via a generator bracket. The generator bracket extends out of the dual-chamber airbag body and is sealed and fixed to the outer side of the frame sidewall of the seat back via connecting fasteners.

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