JPH06239195A - Vehicular air bag device - Google Patents

Abstract

PURPOSE:To depress the generation of sudden air pressure rise and high sound pressure state in a car by providing a means for shifting timing between an air bag for head-on collision and an air bag for side collision in inflating both the air bag for head-on collision and the air bag for side collision in oblique collision. CONSTITUTION:On a floor a collision G sensor 18 for detecting vehicular head-on collision, using acceleration in the back and forth direction of a car, vehicular side collision, using acceleration in the right and left direction, and oblique direction, using acceleration simultaneously applied from the back and forth direction and the right and left direction, an air bag 12 for head-on collision for driver's seat, an air bag 16 for head-on collision for assistant driver's seat, an air bag 14 for side collision for driver's seat, and an air bag control device 19 for implementing control in such a way that inflation timing between an air bag 14 for side collision for driver's seat and a collision air bag for assistant driver's seat may be shifted, are provided the firing timing of an inflator is lagged so that delayed inflation may be provided to the air bags 12, 16 for head-on collision compared to the air bag 14 for collision even if the collision G sensor 18 almost simultaneously detects horizontal load and vertical load in oblique collision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention protects an occupant by deploying airbags to the front of the occupant during a frontal collision, to the side of the occupant during a side collision, and to the front and side of the occupant during an oblique collision. The present invention relates to a vehicle airbag device.

[0002]

2. Description of the Related Art As an example of a vehicle airbag device having a front impact airbag and a side impact airbag, there is an airbag device disclosed in Japanese Utility Model Laid-Open No. 3-121155. This airbag device may be provided with a plurality of collision airbags as shown in FIG. That is, the driver seat S1 on which the driver D is seated
Is stored in the center of the steering wheel 1,
A driver's seat front collision airbag 2 which is deployed in front of the head of the driver D at the time of a frontal collision, and a side door 3 on the driver seat S1 side.
It is equipped with an airbag 4 for driver's seat side collision that is housed inside and expands to the side of the chest and head of the driver D in the event of a side collision to the right side of the vehicle body, and an instrument panel 5 is provided on the passenger seat S2 side. It is housed in the passenger compartment, and is housed in the passenger seat front collision airbag 6 which is deployed in front of the passenger seat passenger (not shown) at the time of a frontal collision and the side door 7 on the passenger seat S2 side.
It is provided with a passenger seat side impact airbag 8 which is deployed to the side of the chest and head of the passenger in the passenger seat in the case of a side collision to the left side of the vehicle body.

When an oblique collision is made from the front in the traveling direction to the driver's seat side, both the front collision collision sensor and the side collision collision sensor (not shown) are turned on, and the driver's seat side collision air is turned on. The bag, the driver's seat front collision airbag, and the passenger's seat front collision airbag are inflated, and the inertial force of the collision causes the surroundings in the collision direction, that is, the traveling direction of the driver and the passenger seat passenger moving diagonally forward. Deployed to protect the occupant from a secondary collision with the steering wheel, instrument panel, the inside of the side door, etc.

[0004]

However, in the above-described conventional vehicle air bag device, the driver seat front collision airbag and the passenger seat front collision airbag are provided in the sealed vehicle interior at the time of an oblique collision, Three airbags having a large volume with the driver side collision airbag, which is the collision side, will be deployed at the same time, the air pressure inside the vehicle will rise rapidly, and the noise generated when gas is generated by the airbag inflator Also, there is a problem in that the generated gas overlaps with the noise generated when the airbag is inflated, and the sound pressure in the vehicle compartment is significantly increased.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a vehicle airbag apparatus capable of suppressing a rapid increase in the air pressure in the vehicle compartment and a high sound pressure state due to the airbag inflation at the time of an oblique collision. Has an aim.

[0006]

SUMMARY OF THE INVENTION As means for solving the above problems, the present invention is directed to a front collision airbag which is deployed in front of an occupant in a vehicle compartment and a side collision air bag which is deployed laterally to the occupant. The airbag for front collision is deployed at the time of a frontal collision with the bag, the airbag for side collision at the collision side is deployed at a side collision, and the airbag for front collision and the side collision at the collision side are further developed at an oblique collision. A vehicle airbag device for deploying both an airbag and a means for shifting the deployment timing of the front-collision airbag and the side-collision airbag which are inflated together at the time of the oblique collision is characterized. There is.

[0007]

With the above structure, the ignition timing of the inflator of the front impact airbag is delayed so that the front impact airbag is deployed later than the side impact airbag when an oblique collision occurs. If the timing of deployment is shifted, the rising speed of the atmospheric pressure in the vehicle compartment is moderated, and the timing of noise generation is dispersed to keep the temperature and pressure at a relatively low level.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle airbag device according to the present invention will be described below with reference to FIGS.

The vehicle airbag device is housed in the central portion of the steering wheel 11 in the vehicle compartment and is deployed to the front of the driver in the event of a collision, and the side door 13 on the driver's seat D side is provided. The vehicle-side collision airbag 14 that is stored inside the vehicle and that is deployed to the side of the driver's chest, shoulders, and head at the time of a collision and the instrument panel 15 on the passenger seat P side, An airbag 16 for front passenger side collision that sometimes expands to the front of the front passenger passenger, and a passenger's chest and shoulders that are housed in a side door (not shown) on the side of the front passenger seat P when a collision occurs. And an airbag for a passenger side collision that is deployed laterally on the head.

Further, on the floor below the console box 17 installed in the center of the front seat, a frontal collision (front collision) of the vehicle is detected by the acceleration in the longitudinal direction of the vehicle body, and the right side of the vehicle is detected by the acceleration in the lateral direction. Collision or side collision, and a collision G sensor 18 for detecting an oblique collision from accelerations applied simultaneously in the front-rear direction and the left-right direction, the driver seat front collision airbag, and the front passenger seat collision. And an airbag control device 19 for controlling the deployment timing of the driver's side collision airbag and the passenger's side collision airbag so as to be shifted from each other.

Next, the operation of this embodiment configured as described above will be described with reference to the flowchart of FIG. 2, which is an example of a control program installed in the airbag control device 19.

When a main switch such as an ignition key is turned on, a program is started, and step 1 for checking whether a lateral load is detected and step 2 for checking whether a vertical load is detected are repeated. .
Then, for example, at the time of a frontal collision of the vehicle, the lateral load is not detected in step 1, so the process proceeds to step 2, and in step 2, the longitudinal load is detected by the collision G sensor 18, so the process proceeds to step 3 and the front impact air is detected. The bag deployment signal is immediately transmitted to the airbag control device 19
Current flows into the inflator for inflating the driver seat front collision airbag 12 and the passenger seat front collision airbag 16, respectively, and the generated gas causes the driver seat front collision airbag 12 and the passenger seat front collision airbag to be inflated. Since the bag 16 is inflated and deployed to the front of the driver and the passenger in the passenger seat, the driver's head can be protected from the secondary collision with the steering wheel 11, and similarly, the passenger seat can be protected. The front collision airbag 16 can be deployed to protect the head and chest of the passenger in the passenger seat from a secondary collision with the instrument panel 15.

If another vehicle collides sideways with the driver's seat of the vehicle body, the lateral load is detected by the collision G sensor 18 in step 1, so the process proceeds to step 4 to deploy the side collision airbag. The signal is emitted immediately. Then, proceed to step 5, and after a certain time delay, proceed to step 2 to check if the vertical load is detected,
Since no vertical load is detected, return to step 1. Therefore, a current flows from the airbag control device 19 to the inflator for inflating the driver-side collision airbag 14, and only the driver-side collision airbag 14 is inflated and deployed between the driver and the side door 13. However, the driver can be protected from a secondary collision with the side door 13.

When the vehicle body obliquely collides with the driver's seat, that is, when the vehicle obliquely collides from the right front, the collision G sensor 18 detects a vertical load from the front of the vehicle and a lateral load from the driver's side almost at the same time. Therefore, since the lateral load is detected by the collision G sensor 18 in step 1, the process proceeds to step 4, and it is necessary to protect the side door 13 side, which has a small shock absorbing area due to the structural material, at an early stage. Immediately after the collision airbag deployment signal is transmitted, the program proceeds to step 5 and is delayed for a certain period of time, and then proceeds to step 2 to check whether or not the vertical load is detected. At this time, since the longitudinal load is also detected, the routine proceeds to step 3, where a front-collision airbag deployment signal is transmitted, and the airbag controller 19 causes the driver's seat front-collision airbag 12
Then, an electric current flows through the inflator that inflates the passenger seat front collision airbag 16 respectively. Therefore, first, after the driver's seat side collision airbag 14 starts to expand, the driver's seat front collision airbag 12 and the passenger's seat front collision airbag 16 start to expand with a certain delay. (The state shown by the solid line in FIG. 1).

As a result, in the case of an oblique collision, the collision G sensor 18
Even if the horizontal load and the vertical load are detected almost at the same time, in the airbag control device 19, the side impact airbag 14 is detected.
Since the ignition timing of the inflator is delayed so that the front airbags 12 and 16 are deployed later than that, the impact sound when the explosives such as the igniter and the gas generating agent of the inflator are burned, and the airbag is It is possible to disperse the timing of the impact sound generated when fully inflated, to alleviate the high sound pressure state, and to suppress the rapid rise in the vehicle interior pressure by shifting the inflation time of a large capacity airbag. be able to.

In this embodiment, the case of a diagonal collision with the driver's seat has been described. However, in the case of a diagonal collision with the passenger's seat, first, the passenger's side collision airbag is inflated, and then the driver's seat. The side airbag is controlled to inflate and deploy.

Further, in this embodiment, the case where the inflator is ignited with a time lag as a means for shifting the deployment timing of the airbag has been described. However, for example, high pressure gas is supplied from a gas cylinder to the airbag. When inflating the air bag, depending on the means for inflating the air bag, such as by varying the length of the gas supply path to each air bag or mechanically shifting the opening timing of the gas supply valve. It is also possible to shift the airbag deployment timing.

[0018]

As described above, according to the present invention, when both the front impact airbag and the side impact airbag are inflated at the time of an oblique collision, the front impact airbag and the side impact airbag are provided. Since a means to shift the deployment timing of is provided,
This has the effects of reducing the rising speed of the atmospheric pressure in the vehicle compartment and suppressing the temperature and pressure to a relatively low level.

[Brief description of drawings]

FIG. 1 is a perspective view of the interior of a vehicle showing an airbag deployment state during an oblique collision according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an example of control for shifting the ignition timing of the inflator.

FIG. 3 is an explanatory diagram showing a deployed state of an airbag in a conventional airbag device.

[Explanation of symbols]

 11 Steering wheel 12 Airbag for driver's front collision 14 Airbag for driver's side collision 16 Passenger's seat front airbag 18 Collision G sensor 19 Airbag control device D Driver's P passenger's seat

Claims (1)

[Claims] 1. A front-collision airbag that is deployed in front of an occupant in a vehicle compartment, a side-collision airbag that is deployed laterally of the occupant, and the front-collision airbag is deployed during a frontal collision to cause a side collision. Sometimes deploy the side airbag on the collision side,
Further, in a vehicle airbag device that deploys both the front-collision airbag and the side-collision airbag on the collision side during a diagonal collision, the front-collision airbag and the side-collision airbag during the diagonal collision. An airbag device for a vehicle, which is provided with a means for shifting the deployment timing of the vehicle.