JP2007153224A - Method of deploying airbag for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of deploying an airbag for an automobile capable of deploying an airbag for a side collision in timing of the start of actual application of the lateral directional inertia force to an occupant in an oblique collision. <P>SOLUTION: In this method of deploying the airbag for an automobile capable of deploying both of an airbag A for a front collision and the airbag B for a side collision on a collision side in an oblique collision of a vehicle, deploying timing of the airbag B for a side collision in the oblique collision is delayed by about 100 ms than that of the airbag A for a front collision. With this structure, the airbag B for a side collision can be deployed in timing of a start of actual application of the lateral directional inertia force to an occupant M, and an inflator 8 for the airbag B for a side collision can be miniaturized. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for deploying an automobile airbag.

  The automobile is provided with at least a front-impact airbag that can be deployed in front of the occupant's living space in the vehicle interior and a side-impact airbag that can be deployed to the side of the occupant's residential space in the vehicle interior. The front impact airbag is installed on, for example, an instrument panel and / or a steering wheel, and is deployed rearward toward the occupant side. The side impact airbag is installed on, for example, a side door, a seat back, and a side roof rail, and is deployed between an occupant and the side door.

  At the time of a frontal collision of an automobile, only the front impact airbag is deployed, and at the time of a side impact, only the impact side airbag is deployed. At the time of an oblique collision, both the front collision airbag and the side collision airbag are deployed.

If both the front airbag and the side airbag are deployed at the same time, the air pressure in the passenger compartment increases rapidly, and the noise generated when gas is generated in the airbag inflator and the generated gas The sound pressure in the passenger compartment is significantly increased due to the noise generated when the bag is inflated, so the deployment timing of the front impact airbag is delayed from that of the side impact airbag, and sudden air pressure and sound pressure in the passenger compartment are increased. A method of deploying an airbag that prevents the air bag from rising is known (see, for example, Patent Document 1).
JP-A-6-239195

  However, in such a conventional technique, the deployment timing of the front impact airbag is delayed from that of the side impact airbag. However, in the case of an oblique collision, the occupant first applies inertial force in the forward direction. After that, in the conventional method of deploying the side airbag, the inertial force in the lateral direction actually acts on the occupant after an oblique collision. Until the start, the inflated state of the side airbag must be maintained, and the inflator of the side airbag must be large and have a high output. For this reason, it is difficult to secure a space for installing the side collision airbag in the side door, the seat back, the side roof rail or the like, which is disadvantageous in terms of cost.

  The present invention has been made paying attention to such a conventional technique, and an automobile capable of deploying a side-impact airbag in accordance with a timing at which a lateral inertial force actually starts acting on an occupant during an oblique collision. A method for deploying a medical airbag is provided.

  The invention according to claim 1 includes at least a front-impact airbag that can be deployed in front of a passenger's living space in a passenger compartment, and a side-impact airbag that can be deployed to the side of the passenger's residential space in the passenger compartment. A method of deploying an automotive airbag that enables deployment of both a frontal collision airbag and a collision-side side airbag during a diagonal collision of a vehicle, wherein It is characterized in that the deployment timing of the airbag is delayed with respect to the deployment timing of the front impact airbag.

  According to the first aspect of the present invention, since the deployment timing of the collision side airbag at the time of the oblique collision is delayed with respect to the front collision airbag, the inertial force in the forward direction of the occupant is increased. Absorbing with the bag and moving the occupant to the front side position of the front collision airbag by deploying the side collision airbag in accordance with the timing when the lateral inertial force of the occupant generated thereafter starts to work Thus, the inflator for the side impact airbag can be reduced in size.

  An object of the present invention is to provide a vehicle airbag deployment method that can deploy a side airbag according to the timing at which a lateral inertial force actually starts acting on an occupant during an oblique collision. A front-impact airbag that can be deployed in front of the passenger's living space and a side-impact airbag that can be deployed to the side of the passenger's living space in the passenger compartment, and at the time of an oblique vehicle collision, Vehicle airbag deployment method that enables deployment of both a collision impact side airbag and a collision impact side airbag at the time of the oblique collision, the deployment timing of the impact side impact airbag is determined as a front impact airbag. This was realized by delaying the deployment timing. Embodiments of the present invention will be described below with reference to the drawings.

  1 to 4 are diagrams showing an embodiment of the present invention. The automobile 1 according to this embodiment includes a front-impact airbag A on a steering wheel 2 in front of the driver's living space and an instrument panel 3 in front of the passenger's living space seated in the passenger seat. Is stored in a folded state. The front-impact airbag A is deployed to the vehicle interior side when the automobile collides with the front. The inflator (not shown) for the front-impact airbag A is a system in which explosives are deployed by two-stage ignition so that all outputs are not concentrated at the initial stage of deployment.

  The side door 5 is provided with a side impact airbag B. The side airbag B is housed in a case 7 having a cover 6 that can be freely opened and closed. This side-impact airbag B is deployed to the vehicle interior side when the vehicle collides sideways.

  An inflator 8 for injecting high-pressure gas is accommodated in a base end portion of the side impact airbag B in a state of being fixed to the retainer 9, and the base end portions of the retainer 9 and the side impact airbag B are connected to the plate 10 and The case 7 is fixed to the side door 5 via the rivet 11. Inside the side impact airbag B, a tether belt 12 that connects the left and right side surfaces of the side impact airbag B is provided to regulate the lateral width of the side impact airbag B when deployed. .

  When the vehicle collides with the front, both the left and right front impact airbags A are deployed. When the side impact occurs, the impact side impact airbag B deploys. Both the crash airbag B are deployed.

  Next, the operation in the case of an oblique collision will be described. For example, when the automobile 1 obliquely collides with the barrier 13 having a predetermined angle θ from the passenger seat side, the front collision airbag A is deployed from the instrument panel 3 positioned in front of the passenger M in the passenger seat. A front collision airbag (not shown) is also deployed from the steering wheel 2 in front of the driver's seat. Further, the side impact airbag B is deployed from the side door 5 on the passenger seat side which is the collision side.

  The deployed front impact airbag A prevents the occupant M from colliding with the front steering wheel 2, the instrument panel 3, and the front window panel, and the deployed side impact airbag B prevents the passenger from The occupant M is prevented from colliding with the side door 5 and the side window panel, and collision with a front pillar (not shown) located at an oblique position of the occupant M is also prevented.

  In the case of an oblique collision, the front collision airbag A is first deployed. That is, as shown in FIG. 4, about 35 ms immediately after the diagonal collision, half of the gunpowder of the inflator of the front impact airbag A is primarily ignited to start deployment. Since the front airbag A does not deploy at full power from the beginning, there is little damage to the occupant M even when the occupant M is in an abnormally close state, such as standing on the rear side of the instrument panel 3. . Next, about 80 ms later, the remaining gunpowder of the inflator of the front impact airbag A is secondarily ignited so that the front impact airbag A is fully deployed.

  After secondary ignition of the front impact airbag A, high pressure gas is injected from the inflator 8 of the side impact airbag B about 100 ms after the oblique impact. That is, after an oblique collision, the forward inertial force F1 immediately acts on the occupant M, but after that, the vehicle laterally moves and the lateral inertial force F2 starts to act on the occupant M after about 100 ms. The inflator 8 of the side airbag B is operated in accordance with the timing, and the side airbag B is deployed forward from the case 7.

  Since the side airbag B is deployed at the same time as the occupant M moves relatively in the lateral direction, the occupant M can be reliably received and protected, and the occupant M can be efficiently protected in a short time. In order to protect, the inflator 8 for deploying the side airbag B is also small, and can be easily installed on the side door 5.

  In the above embodiment, the structure in which the side impact airbag B is deployed laterally from the side door 5 is taken as an example, but as another structure, the side impact airbag is deployed forward from the end of the seat back. Alternatively, the side impact airbag may be deployed in a curtain shape downward from the side roof rail.

The top view which shows the diagonal collision state of the motor vehicle which concerns on one Example of this invention. The disassembled perspective view which shows the structure of the airbag for a side collision. The top view which shows the state which the airbag for side collisions of the passenger seat side expand | deployed. The graph which shows the deployment timing of an airbag.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Steering wheel 5 Side door 8 Inflator A Front impact airbag B Side impact airbag M Crew F1 Forward inertial force F2 Lateral inertial force

Claims (1)

A front-impact airbag that can be deployed in front of the passenger space in the passenger compartment and a side-impact airbag that can be deployed in the passenger compartment side of the passenger compartment. A method of deploying an automobile airbag that enables deployment of both a airbag for collision and a side impact airbag on a collision side,
A method of deploying an airbag for an automobile, wherein the deployment timing of a side impact airbag on a collision side is delayed from the deployment timing of a front impact airbag during the oblique collision.

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