CN117104174A

CN117104174A - Airbag system for vehicle and vehicle

Info

Publication number: CN117104174A
Application number: CN202311304626.7A
Authority: CN
Inventors: 张良城; 丁涛; 杨中卡; 冯静
Original assignee: Mercedes Benz Group AG
Current assignee: Mercedes Benz Group AG
Priority date: 2023-10-10
Filing date: 2023-10-10
Publication date: 2023-11-24

Abstract

The present application proposes an airbag system for a vehicle, the airbag system comprising: a first air bag; at least one second balloon disposed within the first balloon; a controller adapted to acquire at least one occupant parameter of an occupant corresponding to the airbag system and to control inflation of the first and second airbags in accordance with the occupant parameter when the vehicle collides. The application also relates to a corresponding vehicle. The application has the advantages that: the vehicle can intelligently select a proper inflation strategy according to the parameters of the passengers so as to properly protect the passengers and prevent secondary injury.

Description

Airbag system for vehicle and vehicle

Technical Field

The present application relates to an airbag system for a vehicle and a vehicle.

Background

Airbags are an important safety precaution on vehicles. When a vehicle collides, a collision sensor of the vehicle senses the collision and sends a signal to an airbag electronic control unit (AB-ECU, airbag electronic controlunit). The airbag electronic control unit controls the squib of the airbag to squib so that the airbag inflates and pops up to provide cushioning to the occupant. Subsequently, the airbag is slowly deflated.

The deployment shape and deployment size of the existing airbag are fixed, so that it cannot effectively cope with different scenes, sometimes cannot provide sufficient cushioning for the occupant, and sometimes causes secondary injury to the occupant by "sweeping the face".

Disclosure of Invention

The object of the present application is to provide an airbag system for a vehicle that allows the vehicle to intelligently choose the appropriate inflation strategy according to the occupant parameters to provide the occupant with the proper protection and to prevent secondary injuries.

According to a first aspect of the present application, there is provided an airbag system for a vehicle, the airbag system comprising:

a first air bag;

at least one second balloon disposed within the first balloon;

a controller adapted to acquire at least one occupant parameter of an occupant corresponding to the airbag system and to control inflation of the first and second airbags in accordance with the occupant parameter when the vehicle collides.

According to an alternative embodiment of the application, the airbag system is configured to allow for inflation of neither the first airbag nor the second airbag, inflation of only the first airbag, inflation of only the second airbag, and inflation of both the first and second airbags.

According to an alternative embodiment of the application, the airbag system is configured to allow control of the inflation speed, inflation pressure, inflation sequence and/or deflation speed of the first airbag and/or the second airbag.

According to an alternative embodiment of the present application, the occupant parameter includes at least one of occupant size, occupant weight, occupant sitting position, occupant age, occupant health status, occupant pregnancy status, occupant holding article status.

According to an alternative embodiment of the application, the controller is configured for weighting a plurality of occupant parameters and controlling the inflation of the first and second airbags in dependence on the weighting result.

According to an alternative embodiment of the application, the at least one second balloon comprises at least two second balloons, which are independent of each other or one of which is located within the other second balloon.

According to an alternative embodiment of the application, the airbag system comprises a drawstring for controlling the deployment shape of the second airbag.

According to an alternative embodiment of the application, the controller is configured to be adapted to execute at least one of the following control strategies:

inflating only the second airbag when the body size of the passenger and/or the weight of the passenger is lower than a threshold value and the sitting position of the passenger forwards exceeds a preset position;

inflating only the first airbag when the occupant size and/or the occupant weight is acquired to be higher than a threshold value and the occupant seating position is not advanced beyond a preset position;

and simultaneously or sequentially inflating the second air bag and the first air bag when the body size of the passenger and/or the weight of the passenger are/is higher than a threshold value and the riding position of the passenger forwards exceeds a preset position.

According to an alternative embodiment of the present application, the occupant body shape is acquired from an occupant image taken by an onboard camera of the vehicle.

According to an alternative embodiment of the application, the weight of the occupant is obtained by means of a weight sensor in the seat of the vehicle.

According to an alternative embodiment of the present application, the controller determines whether the occupant seating position exceeds the preset position forward based on at least one of:

the controller directly derives whether the occupant seating position exceeds a preset position forward based on the obtained in-vehicle image;

the controller infers whether the occupant seating position exceeds a preset position forward based on the obtained occupant seat position.

According to an alternative embodiment of the application, the first balloon has a first igniter which generates gas when ignited to inflate the first balloon, and the second balloon has a second igniter which generates gas when ignited to inflate the second balloon.

According to an alternative embodiment of the application, the first and/or the second booster is a single-stage booster or a multi-stage booster.

According to an alternative embodiment of the application, the controller additionally considers the crash speed and/or crash acceleration of the vehicle when controlling the inflation of the first and second airbags.

According to a second aspect of the present application there is provided a vehicle comprising the aforementioned airbag system for a vehicle.

The application has the positive effects that: the vehicle can intelligently select a proper inflation strategy according to the parameters of the passengers so as to properly protect the passengers and prevent secondary injury.

Drawings

The principles, features and advantages of the present application may be better understood by describing the present application in more detail with reference to the drawings. The drawings include:

fig. 1 shows in a schematic view one example of an airbag system for a vehicle of the present application. .

Fig. 2 schematically shows a second example of an airbag of the airbag system of the application.

Fig. 3 schematically shows a third example of an airbag of the airbag system of the application.

Fig. 4 schematically shows a fourth example of an airbag of the airbag system of the application.

Fig. 5 schematically shows an example of the airbag system of the present application.

Reference numerals

1 first air bag, 10 first igniter

2 second air bag, 20 second explosion igniter, 21 pull belt

3 occupant

4 vehicle

5 controller

Detailed Description

In order to make the technical problems, technical solutions and advantageous technical effects to be solved by the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and a plurality of exemplary embodiments. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the application.

Fig. 1 shows in a schematic diagram one example of an airbag system for a vehicle 4 of the present application. In fig. 1, the airbag system is an airbag system for a front passenger 3. Here, the airbag system may be either an airbag system for a driver or an airbag system for a passenger. It is also conceivable that the airbag system is an airbag system for a rear-row occupant 3. The airbag system acts in particular at least on the front side of the occupant 3, in particular on the head and/or chest of the occupant 3.

As shown in fig. 1, in the present application, an airbag system includes:

a first balloon 1;

at least one second balloon 2 disposed within the first balloon 1;

a controller 5, the controller 5 being adapted to acquire at least one occupant parameter of an occupant 3 corresponding to the airbag system and to control inflation of the first and second airbags 1 and 2 in accordance with the occupant parameter when the vehicle 4 collides.

Thus, the inflation strategy for both airbags can be selected according to the occupant parameters, thereby providing appropriate protection for the occupant 3. The protection is based on, inter alia, the following considerations: both the impact of the airbag against the occupant 3 and the insufficient support provided by the airbag against the occupant 3 are prevented.

According to an exemplary embodiment of the present application, the airbag system is configured to allow for not inflating the first airbag 1 and the second airbag 2, inflating only the first airbag 1, inflating only the second airbag 2, and inflating both the first airbag 1 and the second airbag 2. Thereby providing at least four different inflation strategies to address different scenarios.

According to an exemplary embodiment of the present application, the airbag system is configured to allow control of the inflation speed, inflation pressure, inflation sequence and/or deflation speed of the first airbag 1 and/or the second airbag 2. Thereby allowing finer and more appropriate control of the inflation and thus providing appropriate protection for the occupant 3.

According to an exemplary embodiment of the present application, the occupant parameter includes at least one of an occupant size, an occupant weight, an occupant sitting position, an occupant age, an occupant health state, an occupant pregnancy state, an occupant holding article state of the occupant 3.

The occupant parameters are derived, for example, by onboard sensors and/or cameras. For example, the occupant image may be captured by a camera outside and/or inside the vehicle, and thus the occupant body shape, occupant sitting position, occupant age, occupant pregnancy status, occupant holding article status may be derived from the occupant image. The occupant weight may be obtained by a weight sensor in the seat. The position of the passenger seat can be detected by the seat position sensor, in particular whether the position of the passenger seat is relatively forward or relatively rearward. Whether the back of the occupant 3 is resting on the seat back can be known by a pressure sensor on the seat back. Whether the head of the occupant 3 is resting on the seat headrest can be known by a pressure sensor on the seat headrest.

Alternatively or additionally, it is conceivable that the occupant parameters may be entered via the vehicle system or the mobile device, or that physical examination information of the occupant 3 may be shared with the vehicle system.

It is conceivable here for the controller 5 to control the inflation in accordance with the occupant parameters according to the following control strategy:

if the occupant size and/or occupant body weight is large, the occupant 3 will sit relatively rearwards and the required cushioning is greater, whereby it is considered that only the first airbag 1 is inflated or the first and second airbags 1 and 2 are inflated, and if the occupant size and/or occupant body weight is small, the occupant 3 will sit forwards, whereby it is considered that only the second airbag 2 is inflated, and that inflating the first airbag 1 may sweep the occupant 3;

if the sitting posture of the occupant is abnormal, such as the co-driver resting his feet on the instrument desk or the co-driver resting his feet on the seat, it is considered that the first airbag 1 and the second airbag 2 are not inflated, otherwise greater injury may be caused;

if the occupant 3 leans forward, it is possible to consider inflating only the second airbag 2, inflating the first airbag 1 may sweep the occupant 3, and if the occupant 3 leans against the seat, it is possible to consider inflating only the first airbag 1;

if the seat position of the passenger is forward, it is considered to inflate only the second airbag 2, the inflation of the first airbag 1 may sweep the face of the passenger 3, and if the seat position of the passenger is rearward, it is considered to inflate only the first airbag 1;

if the occupant 3 is a child or elderly or pregnant woman or a weak patient, it is conceivable that the first and second airbags 1 and 2 are not inflated, otherwise the airbag impact would cause greater injury to such a population;

if the occupant 3 holds an item on his hand or rests an item on his leg, it may be considered that the first and second airbags 1 and 2 are not inflated, otherwise the airbags may directly push sharp objects in the item against the occupant 3 causing greater injury.

In the above, the descriptions are exemplarily described for the individual occupant parameters, respectively.

It is also conceivable that the controller 5 takes into account at least two occupant parameters in the control. For example, the controller 5 may be configured to be adapted to execute at least one of the following control strategies:

inflating only the second airbag 2 when the occupant size and/or the occupant weight is acquired to be lower than a threshold value and the occupant seating position is advanced beyond a preset position;

inflating only the first airbag 1 when the occupant size and/or the occupant weight is acquired to be higher than a threshold value and the occupant seating position is not advanced beyond a preset position;

when the occupant size and/or the occupant weight are/is higher than the threshold value and the occupant seating position is advanced beyond the preset position, the second airbag 2 and the first airbag 1 are inflated simultaneously or sequentially. Here, since the occupant 3 is large in size and short in distance from the airbag, it may be difficult to prevent the occupant 3 from knocking onto the instrument desk by the first airbag 1 alone, and thus it is advantageous to use a two-layer airbag.

Here, the occupant body type may be acquired by an occupant image captured by an in-vehicle camera of the vehicle 4 as described above, and the occupant weight may be acquired by a weight sensor in a seat of the vehicle 4 as described above.

Further, whether the occupant seating position exceeds the preset position forward may be determined based on at least one of the following manners as described above:

the controller 5 directly derives whether the occupant seating position exceeds a preset position forward based on the obtained in-vehicle image;

the controller 5 deduces whether the occupant seating position exceeds a preset position forward based on the obtained occupant seat position.

It is also conceivable that the controller 5 is configured to weight a plurality of occupant parameters and to control the inflation of the first airbag 1 and the second airbag 2 in accordance with the weighting result.

In fig. 1, a first airbag 1 and a second airbag 2 are shown.

Unlike fig. 1, the at least one second airbag 2 may include at least two second airbags 2. The at least two second airbags 2 may be independent of each other as shown in fig. 2 or one second airbag 2 may be located within the other second airbag 2 as shown in fig. 3. By means of at least two second air bags 2 which are independent of each other, different support shapes, such as shapes which conform to the face, can be formed inside the first air bag 1. A greater variety of airbag supports can be formed by the nested at least two second airbags 2.

According to an exemplary embodiment of the present application, as shown in fig. 4, the airbag system includes a pull strap 21 for controlling the deployment shape of the second airbag 2. The second airbag 2 can be easily caused to take a predetermined shape in the deployed state by pulling the tether 21. It is also contemplated that the airbag system includes a drawstring severing device. The tether cutting device is controlled by the controller 5, for example, and cuts the tether 21 at an appropriate timing, so that the second airbag 2 itself can achieve two deployment states.

As shown in fig. 5, the first airbag 1 has a first inflator 10, and the first inflator 10 generates gas to inflate the first airbag 1 when it is ignited. Likewise, the second airbag 2 has a second squib 20, which second squib 20 generates gas to inflate the second airbag 2 when squib. The first and second implosions 10 and 20 may be single stage implosions, but may also be multi-stage implosions. For example, a multi-stage squib has, for example, at least two stages, where the first stage has a long squib completion time and a large amount of gas is formed, and the second stage has a short squib completion time and a small amount of gas is formed. The first stage may be ignited only or the second stage may be ignited only or both the first and second stages may be ignited.

According to an exemplary embodiment of the present application, the controller 5 additionally considers the collision velocity and/or the collision acceleration of the vehicle 4 when controlling the inflation of the first airbag 1 and the second airbag 2. If the collision velocity and/or the collision acceleration of the vehicle 4 is large, it may be considered to fire only the second airbag 2. Because the head and neck of the occupant 3 moves forward faster due to inertia in the event of a large collision velocity and/or a large collision acceleration. At this time, if the first airbag 1 is ignited, the first airbag 1 "sweeps the face" of the occupant 3. If the collision velocity and/or the collision acceleration of the vehicle 4 is small, it may be considered to fire only the first airbag 1.

In this context, terms indicating orientation such as "front", "rear" and the like are used to describe the embodiments. Such words are especially in terms of the fore-and-aft orientation of the vehicle on flat ground and are not to be construed as absolute limitations. Obviously, in the case of vehicles in different poses, the meaning of these words and phrases may vary accordingly. "plurality" is understood to mean at least two. The shapes, sizes and positional relationships of the individual elements in the drawings should be understood by way of example, and not as an absolute limitation of the application. It is apparent that a person skilled in the art can conceive reasonable modifications to the shape, size and positional relationship of the respective elements.

Although specific embodiments of the application have been described in detail herein, they are presented for purposes of illustration only and are not to be construed as limiting the scope of the application. Various substitutions, alterations, and modifications can be made without departing from the spirit and scope of the application.

Claims

1. An airbag system for a vehicle (4), characterized in that the airbag system comprises:

a first balloon (1);

at least one second balloon (2) arranged in the first balloon (1);

-a controller (5), the controller (5) being adapted to obtain at least one occupant parameter of an occupant (3) corresponding to the airbag system and to control the inflation of the first (1) and second (2) airbags in accordance with the occupant parameter when the vehicle (4) is involved in a collision.

2. An airbag system for a vehicle (4) according to claim 1, characterized in that,

the airbag system is configured to allow for non-inflation of the first airbag (1) and the second airbag (2), inflation of the first airbag (1) only, inflation of the second airbag (2) only, and inflation of both the first airbag (1) and the second airbag (2); and/or

The airbag system is configured to allow control of the inflation speed, inflation pressure, inflation sequence and/or deflation speed of the first airbag (1) and/or the second airbag (2).

3. An airbag system for a vehicle (4) according to claim 1 or 2, characterized in that,

the occupant parameters include at least one of occupant size, occupant weight, occupant sitting position, occupant age, occupant health status, occupant pregnancy status, occupant holding article status of the occupant (3); and/or

The controller (5) is configured for weighting a plurality of occupant parameters and controlling the inflation of the first airbag (1) and the second airbag (2) in dependence on the weighting result.

4. An airbag system for a vehicle (4) according to claim 1 or 2, characterized in that,

the at least one second airbag (2) comprises at least two second airbags (2), the at least two second airbags (2) being independent of each other or one of the second airbags (2) being located within the other second airbag (2); and/or

The airbag system includes a tether (21) for controlling the deployment shape of the second airbag (2).

5. The airbag system for a vehicle (4) according to claim 1 or 2, characterized in that the controller (5) is configured to be adapted to perform at least one of the following control strategies:

inflating only the second airbag (2) when the body size of the passenger and/or the weight of the passenger is lower than a threshold value and the sitting position of the passenger forwards exceeds a preset position;

inflating only the first airbag (1) when the body size of the passenger and/or the weight of the passenger is/are acquired to be higher than a threshold value and the passenger sitting position is not forward beyond a preset position;

when the body size of the passenger and/or the weight of the passenger are/is higher than a threshold value and the passenger sitting position forwards exceeds a preset position, the second air bag (2) and the first air bag (1) are inflated simultaneously or sequentially.

6. An airbag system for a vehicle (4) according to claim 5, characterized in that,

acquiring an occupant body shape from an occupant image captured by an in-vehicle camera of the vehicle (4); and/or

The weight of the occupant is acquired by a weight sensor in the seat of the vehicle (4).

7. The airbag system for a vehicle (4) according to claim 5, wherein the controller (5) determines whether the occupant seating position exceeds a preset position forward based on at least one of:

the controller (5) directly derives whether the occupant seating position exceeds a preset position forward based on the obtained in-vehicle image;

the controller (5) deduces whether the occupant seating position exceeds a preset position forward based on the obtained occupant seat position.

8. An airbag system for a vehicle (4) according to claim 1 or 2, characterized in that,

the first airbag (1) has a first igniter (10), the first igniter (10) generating gas when being ignited to inflate the first airbag (1), the second airbag (2) has a second igniter (20), the second igniter (20) generating gas when being ignited to inflate the second airbag (2);

the first (10) and/or the second (20) booster is a single stage booster or a multi-stage booster.

9. Airbag system for a vehicle (4) according to claim 1 or 2, characterized in that the controller (5) additionally takes into account the collision speed and/or the collision acceleration of the vehicle (4) when controlling the inflation of the first airbag (1) and the second airbag (2).

10. A vehicle (4), characterized in that the vehicle (4) comprises an airbag system for a vehicle (4) according to any one of claims 1 to 9.