JPH11286256A - Airbag deployment control device - Google Patents

Abstract

(57) [Summary] [Problem] To suppress excessive pressure on the occupant's chest and the like by changing the difference in restraint conditions between the driver's seat and the passenger's seat at the sitting position and controlling two-stage ignition timing. The present invention provides an airbag deployment control device capable of performing the above. A driver's seat dual-stage inflator (22) is provided in front of a driver's seat (3) to obtain a two-stage deployment output by two-stage ignition, and a two-stage deployment output is obtained in front of a passenger seat (4) by two-stage ignition. The driver's seat dual stage inflator 23 is provided, a driver's seat position detection system 35 for detecting the position of an occupant seated in the driver's seat 3, and a passenger's seat position detection system 39 for detecting the position of an occupant seated in the passenger's seat are provided. An airbag control unit 21 for independently changing the second-stage ignition time of each of the driver's seat and the passenger's seat airbag device 19, 20 according to the occupant seating position detected by each system 35, 39 is provided. .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag deployment control device in which airbag devices are provided in both a driver's seat and a passenger seat of an automobile.

[0002]

2. Description of the Related Art FIGS. 10 and 11 show an example of a conventional airbag deployment apparatus for a vehicle of this type.

In such a vehicle, a passenger compartment 2 of an automobile 1
A pair of left and right driver's seats 3 and a passenger seat 4 are provided in the inner front part 2a.

[0004] A handle portion 6 is rotatably mounted on the instrument panel 5 in front of the driver's seat 3 by projecting a rotation axis toward the driver's seat 3. A driver's seat airbag device 9 is provided in a front portion 8 substantially at the center of the steering wheel 7 of the handle portion 6. The driver's seat airbag device 9 has an airbag body 10 which has a bag shape and restrains an occupant seated in the driver's seat 3 by deployment, and an inflator 11 as a gas generator which obtains a deployment output by ignition. Are provided.

A glove box 12 is provided on the instrument panel 5 in front of the passenger seat 4.
In the instrument panel 5, above the glove box 12, a passenger airbag device 13 is provided. The passenger-seat airbag device 13 has a bag shape, expands from the upper surface portion 5a of the instrument panel 5 when deployed, and restrains an occupant seated in the passenger seat 4 with an airbag body 14; And an inflator 15 as a gas generator for obtaining a developed output.

The driver's seat airbag device 9
And the passenger seat airbag device 13 is provided in the floor tunnel section 1.
6 is connected to an airbag sensor unit 17 disposed in the airbag sensor 6.

[0007] In the conventional airbag deploying device configured as described above, when the airbag sensor unit 17 detects a collision, the inflator 11 of the passenger seat airbag device 13 and the inflator 11 of the driver seat airbag device 13 are provided. By igniting the gas, the airbag bodies 10 and 14 are inflated into the passenger compartment 2 by ejecting gas.

As shown in FIG. 11, the pressure of the inflator 11 of the passenger seat air bag device 13 is plotted using a black square in the driver's seat airbag, as plotted using a white square. The pressure is set higher than the pressure of the inflator 15 of the device 9. Therefore, even if the occupant is seated on the front passenger seat 4 far from the front passenger seat airbag device 13 by being disposed on the upper surface portion 5a of the instrument panel 5 than the distance to the occupant seated on the driver seat 3, Airbag body 1 with large capacity and high pressure
4 is restrained.

Therefore, for example, when the seating position is
When the airbag body 14 is deployed at a high pressure in a state relatively close to the front passenger seat airbag device 13 at the front side of the vehicle, the occupant's chest and the like may be excessively pressed and may not necessarily be restrained satisfactorily.

For example, conventionally, as this kind of technology, as described in Japanese Patent Application Laid-Open No. 3-548 or the like, the inflator 15 capable of obtaining a two-stage deployment output by two-stage ignition is used. First, as plotted by the black circles in FIG. 11, the first stage ignition is performed at an output of about 40% of the ignition output at the time of the black squares, and subsequently for about 10 several milliseconds. It is known that the ignition of the second stage is performed with an output of about 80% of the ignition output at the time of the black square, as shown by the double circle plot in the figure. Have been.

[0011] In such a case, the first stage of relatively low pressure ignition avoids the area a where damage increases in the vicinity of about 20 milliseconds from the collision while avoiding the area a where the initial restraint time b is about 20 ms. Specified pressure (about 350KP) within 42 milliseconds
Until a), the pressure in the airbag body 14 can be increased by the ignition of the second stage, and the occupant is restrained at the occupant restraint position of the passenger seat 4.

As another example of this type of airbag deployment device, a mechanism for changing the deployment output into two types, large and small, according to the seating position is described in Japanese Patent Application Laid-Open No. 2-60858.

[0013]

However, in such a conventional airbag deploying device, the pressure of the inflator 15 of the passenger seat airbag device 13 must inflate the airbag body 14 having a relatively large capacity. The inflator 11 of the driver's seat airbag device 9 must be
The pressure is set higher than the pressure. Since the pressure of the first stage cannot be reduced so much as to be a reference value, the region a in which compression on the chest or the like in the vicinity is likely to occur a
However, it concentrates on the time earlier than the region e where the compression to the chest or the like in the vicinity of the driver's seat 3 is likely to occur.

Immediately after the peak of the region a, the second stage ignition timing of the driver's seat airbag device 9 is set in accordance with the second stage ignition timing of the passenger's seat airbag device 11 that immediately ignites the second stage. Then, even in the normal seating position, the driver's seat airbag device 9 is more advanced than the passenger seat airbag device 13 by the amount that the handle portion 6 protrudes from the instrument panel 5 toward the driver's seat 4. Also,
Because it is close to the occupant, there is a possibility that the occupant's chest and the like may be compressed.

Further, the airbag deploying device described in the conventional publication also has an inflator provided in the driver's seat airbag device 9 regardless of whether the seating position is forward or a regular seating position. The second-stage ignition time with the inflator 15 provided in the airbag device 13 for the passenger seat 11 is fixed so as to be delayed by a predetermined time after the first stage is ignited.

For this reason, in the driver's seat 3 in which the handle portion 6 projects from the instrument panel 5 into the passenger compartment 2, the ignition start time of the first stage, which is closer to the driver's seat airbag device 9, is set. Although it is desirable to set the airbag body relatively quickly, in the close state, the occupant may temporarily set the airbag body 1.
The second step is to raise the pressure to a predetermined pressure (about 180 KPa) at which the restraint can be performed by the predetermined initial restraint time c of about 32 milliseconds without waiting for the rearward tilting to be started after abutting on No. 4. There is a possibility that the pressure increase due to the ignition of the battery may be started.

Accordingly, the present invention reduces the difference in restraint conditions between the driver's seat and the passenger's seat by changing the seating position and controlling the two-stage ignition timing to reduce excessive compression on the occupant's chest and the like. An object of the present invention is to provide an airbag deployment control device capable of causing the airbag to be deployed.

[0018]

According to the first aspect of the present invention, there is provided an airbag for a driver's seat having a gas generator for generating a two-stage deployment output in front of the driver's seat. Along with installing the device, in front of the passenger seat,
A passenger seat airbag device having a gas generating device that generates a two-stage deployment output is provided, driver's seat occupant position detecting means for detecting an occupant position of a driver seat, and a passenger seat for detecting the occupant position of the passenger seat Control means for providing occupant position detecting means for independently changing the second stage deployment start time of each of the driver's seat and the passenger's seat airbag device in accordance with the occupant position detected by each of the occupant position detecting means. An airbag deployment control device having the following features.

According to the first aspect of the present invention, the driver's seat occupant position detecting means detects the occupant position of the driver's seat, and the passenger seat occupant position detecting means detects the occupant position of the passenger seat. Detect independently.

Then, in accordance with the occupant positions detected by the driver and passenger seat occupant position detecting means by the control means, the deployment start time of the driver and passenger airbag devices in the second stage is set to: Each is changed independently.

As described above, the difference in the restraint condition between the driver's seat and the passenger's seat is independently changed at the seating position, and the ignition time of the second stage is controlled so as to be appropriately changeable.
Excessive pressure on the occupant's chest etc. can be reduced.

According to a second aspect of the present invention, in the control means, when the occupants of the driver's seat and the passenger's seat are located at a predetermined distance from each of the airbag devices, 2. The airbag deployment control device according to claim 1, wherein the second stage deployment start time of the seat airbag device is controlled to be earlier than the second stage deployment start time of the passenger seat airbag device. .

According to the second aspect of the present invention, when the occupants in the driver's seat and the passenger's seat are at positions separated from the respective airbag devices by a predetermined distance or more, the control means controls The second-stage deployment start time of the driver seat airbag device is controlled to be earlier than the second-stage deployment start time of the passenger seat airbag device.

For this reason, the driver's seat airbag device is immediately pressurized to a predetermined pressure that can be restrained, and restrains the occupant in the driver's seat.

According to the third aspect,
In the control means, when the occupants of the driver's seat and the passenger's seat are located within a predetermined distance from each of the airbag devices, the second stage deployment start time of the driver's seat airbag device is reduced. Than the deployment start time of the second stage of the device,
The airbag deployment control device according to claim 1 or 2, wherein the control is performed so as to be delayed.

According to the third aspect of the present invention, when the occupants in the driver's seat and the passenger's seat are located within a predetermined distance from each of the airbag devices, the driver's seat is controlled by the control means. The second stage deployment start time of the airbag device is controlled to be later than the deployment start time of the passenger seat airbag device.

[0027] Therefore, it is possible to suppress the deployment in which the occupant in the driver's seat presses the chest or the like by the early deployment of the airbag device.

The passenger in the passenger seat is restrained by the passenger airbag device which is ignited relatively early.

According to the fourth aspect of the present invention, in the control means, when the occupants in the driver's seat and the passenger's seat are located within a predetermined distance from each of the airbag devices, A first delay time of each airbag device from the start of deployment of the first stage to the start of deployment of the second stage;
When the occupants of the driver's seat and the passenger seat are more than a predetermined distance from each of the airbag devices, each airbag from the first stage of deployment of each airbag device to the beginning of deployment of the second stage. A second delay time of the device is set, and a second delay time for the first delay time of each of the airbag devices is set to be greater in the driver seat airbag device than in the passenger seat airbag device. 2. The method according to claim 1, wherein the control is performed so as to increase.
The airbag deployment control device according to any one of the above items 3 to 3, is characterized.

According to the fourth aspect of the present invention, the delay time from the start of the first stage deployment to the second stage deployment by the control means is shorter than that of the passenger airbag device. Since the driver's seat airbag device is controlled to be larger, in the close state, the occupant once contacts the driver's seat airbag device, and then the second stage from the start of the first stage deployment of the passenger seat airbag device. After a delay longer than the delay time until the start of eye deployment, the start of the second-stage deployment of the driver's seat airbag device is waited until the occupant starts to lean backward. Then, after the start of the backward tilt, the pressure increase due to the start of the second-stage deployment is started.

Therefore, it is possible to avoid regions where excessive pressure on the chest or the like is likely to occur separately in the driver's seat and the passenger's seat.

Further, according to the fifth aspect, the control means sets the first stage deployment start time of the driver's seat to be earlier than the first stage deployment start time of the passenger seat. An airbag deployment control device according to any one of claims 1 to 4, is characterized.

According to the fifth aspect of the present invention, the control means sets the first-stage deployment start time of the driver's seat to be earlier than the first-stage deployment start time of the passenger seat. Therefore, for example, even when the driver is holding the driver in the driver's seat and clinging to the steering wheel, the rapid deployment of the airbag body that compresses the chest and the like is avoided, and moreover, the driver directly touches the steering wheel and the like. The abutment is avoided, and the occupant is received by the airbag deployed in a low pressure state.

[0034]

Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. The same or equivalent parts as those in the conventional example are denoted by the same reference numerals and described.

FIGS. 1 to 7 show a first embodiment of the present invention.
A pair of left and right driver's seats 3 and a passenger seat 4 are disposed in a front portion 2a in a passenger compartment 2 of an automobile 18.

A handle portion 6 is pivotally attached to the instrument panel 5 in front of the driver's seat 3 so as to be rotatable by projecting a rotation axis toward the driver's seat 3. A dual-stage driver's seat airbag device 19 is provided in the front portion 8 of the steering wheel 6 substantially at the center of the steering wheel 7. The dual-stage driver's seat airbag device 19 has a bag-like shape and, when deployed, an airbag body 10 that restrains an occupant seated in the driver's seat 3 and a two-stage ignition to provide a two-stage deployment output. A driver's seat dual stage inflator 22 is provided as a gas generating device to be obtained. The driver's seat dual stage inflator 22 is provided with a first stage inflator 22a and a second stage inflator 22b.

A glove box 12 is provided on the instrument panel 5 in front of the passenger seat 4.
In the instrument panel 5, a dual-stage passenger airbag device 20 is provided above the glove box 12.

The dual-stage passenger-seat airbag device 20 has a bag-like shape, and swells out of the instrument panel 5 upper surface portion 5a upon deployment.
There is provided an airbag body 14 for restraining an occupant seated in the vehicle, and a passenger-stage dual-stage inflator 23 as a gas generator for obtaining a deployment output by ignition.
The passenger seat dual stage inflator 23 includes a first stage inflator 23a and a second stage inflator 23b.
Is provided.

In the dual-stage driver airbag device 19, the first-stage inflator 22a is
Via the cables 24a and 24b of the spiral cable section 24, and the second-stage inflator 22b via the cables 24c and 24d of the spiral cable section 24,
It is individually connected to an airbag control unit 21 as control means provided in the floor tunnel section 16. In the dual-stage passenger seat airbag device 20, the first-stage inflator 23a and the second-stage inflator 23b are individually connected to the airbag control unit 21.

This airbag control unit 21
As shown in FIG. 1, a driver airbag first driver section 25 for igniting a first-stage inflator 22a of the driver's seat dual-stage inflator 22, and a driver-seat airbag first for igniting the second-stage inflator 22b. Two driver units 26 are provided.

The airbag control unit 21 includes a first driver airbag driver 27 for igniting the first-stage inflator 23a of the passenger-stage dual-stage inflator 23 and an assistant for igniting the second-stage inflator 23b. A seat airbag second driver section 28 is provided.

The airbag control unit 21
Is provided with a G sensor 29 for detecting a collision acceleration generated at the time of collision of the automobile 18. This G sensor 29
Based on the acceleration detected in the step (2), the deployment determination and timing determination function unit 30 determines whether the driver airbag driver 2
It is mainly determined whether to ignite 5 or the like.

Further, the airbag control unit 21 is provided with a communication interface 31 so that external sensors can be connected.

In the first embodiment, the sensor module 32 is connected to the airbag control unit 21.

The sensor module 32 includes a roof 3
The three front edges are disposed at positions where the occupant seating position can be reliably detected without interfering with other members above the rear-view mirror 34, and mainly include a driver seat position detecting system 35, a passenger seat position detecting system 39, and A passenger airbag cutoff warning lamp 44 is provided.

The driver's seat position detection system 35 is provided with an ultrasonic sensor 36 and a position detection unit 37, which are interlocked with a driver's seat detection sensor 38 provided in the seat portion 3a of the driver's seat 3. Then, the presence or absence of an occupant sitting in the driver's seat 3 and the distance LD from the dual-stage driver's seat airbag device 19 to the occupant are closer than a predetermined distance L0 or a regular seating position that is not close. Is configured to be detected.

The passenger seat position detecting system 39 is provided with an ultrasonic sensor 40, an infrared sensor 41 and a position detecting unit 42. The passenger seat occupancy detection provided on the seat portion 4a of the passenger seat 4 is detected. In conjunction with the sensor 43, the presence or absence of an occupant seated in the front passenger seat 4 and the distance LA from the dual-stage front passenger seat airbag device 20 to the occupant are closer to or shorter than a predetermined distance L1. It is configured to detect whether the seating position is a regular seating position.

In the airbag control unit 21, the delay time T1 to T4 from when the first stage is ignited to when the second stage is ignited is determined by the deployment judgment and timing determination function unit 30 in the normal seating state. The delay time on the driver's seat side is divided into T1 and T2, and the delay time on the passenger seat side is divided into T3 and T3, respectively, into the timing (FULL DEPLOY) and the timing (TAILORED DEPLOY) in the close adhesive seat state. It is set separately for T4.

The relationship between the lengths of the delay times T1 to T4 is T1 <T2, T3 <T4, and T1 <T2.
<T4 and T2> T3, or T1 = T4 or
T2 may be equal to T3. In the first embodiment, T
1 = about 5 ms, T2 = about 30 ms, T3 = about 10 ms, T4 = about 20 ms.

Next, the operation of the airbag deployment control device according to the first embodiment will be described with reference to the flowchart shown in FIG.

First, in Step 1, when the airbag deployment control device starts, in Step 2, the vehicle 1
In the case of the collision of No. 8, the acceleration at the time of the collision is detected by the G sensor 29 provided in the airbag control unit 21 and sent to the deployment determination and timing determination mechanism 30 as an acceleration signal.

In Step 3, it is determined from the transmitted acceleration signal whether or not the airbag needs to be deployed. If the acceleration exceeds a size that requires the deployment of the airbag to protect the occupant, the next Step
4 and Step 5, if the acceleration is such that the occupant protection by airbag deployment is not required, St
Return to ep1.

In Step 4, the driver's seat airbag first driver section 25 provided in the airbag control unit 21 sends the driver's seat dual stage inflator 22 to the first stage inflator 22a.
Cables 24a, 24 of the spiral cable section 24
An ignition current is sent via b. The first-stage inflator 22a is ignited by the ignition current, and inflates the airbag body 10 in the direction of the driver's seat 3 with an output of about 40% of the output of the base line as a base. Embodiment 1
In FIG. 3, the time TD0 at which the first-stage inflator 22a is ignited is set within about 4 milliseconds after the collision.

In Step 5, the infrared sensor 41 and the passenger seat detection sensor 43 of the passenger seat occupant position detection system 39 detect whether or not the passenger is seated on the passenger seat 4, and in Step 6, the passenger is seated. When the user is sitting on the seat 4, the process proceeds to the next Step 7, and when the user is not seated, the process returns to the Step 1.

In Step 7, an ignition current is sent to the first-stage inflator 23a of the front-seat dual-stage inflator 23 by the first-passenger-seat airbag driver 27 provided in the airbag control unit 21. The first-stage inflator 23a includes:
The ignition is ignited by this ignition current, and the airbag body 14 is inflated in the direction of the passenger seat 4 with an output of about 40% of the output of the baseline serving as a base. In the first embodiment, as shown in FIG. 4, the time TA0 at which the first-stage inflator 23a is ignited is set within about 9 milliseconds after the collision. As described above, in the first embodiment, the first driver ignition time of the dual driver airbag device 19 is set earlier than the first driver ignition time of the dual passenger airbag device 21, and thus the dual driver airbag 19 is set. Distance L from bag device 19
An occupant seated in the driver's seat 3 where D is close is in a region f in FIG.
The handle portion 6 is prevented from colliding with the steering wheel 7 or the like, for example, by pressing the adjacent chest.

In Step 8, a position detection unit 37 interlocked with the ultrasonic sensor 36 and the driver's seat detection sensor 38 of the driver's seat position detection system 35 is used.
The presence or absence of an occupant sitting in the driver's seat 3 and the distance LD from the dual-stage driver's seat airbag device 19 to the occupant
Is detected and sent to the airbag control unit 21.

In Step 9, the deployment judgment and timing determination function unit 30 of the airbag control unit 21 determines whether the distance LD from the dual-stage driver's seat airbag device 19 to the occupant is shorter than a predetermined distance L0. , It is determined whether the seating position is a normal seating position that is not close.

If the seat is in the normal seating position, Step
Proceeding to 10, the driver's seat second driver section 26
Of the driver seat dual stage inflator 22,
An ignition current is sent to the second-stage inflator 22b via the cables 24c and 24d of the spiral cable portion 24.

The second-stage inflator 22b is ignited by the ignition current, and adds about 80% of the output of the base line, which is the base, to about 40% of the output of the first-stage inflator 22a. The airbag body 10 is inflated in the direction. In the first embodiment, as shown in FIG. 3, the time at which the second-stage inflator 22b is ignited when the seat is in the normal seating position is determined by the first-stage inflator 22b.
The delay time T1 is about 5 milliseconds from the ignition time a, and the delay time is about 9 milliseconds from the collision.

When the seating positions are close to each other,
Proceeding to Step 11, the driver's seat dual stage inflator 22 is driven by the driver's seat second driver unit 26.
Among them, the ignition current is sent to the second-stage inflator 22b via the cables 24c and 24d of the spiral cable portion 24.

The second-stage inflator 22b is ignited by the ignition current, and adds about 80% of the output of the base line, which is the base line, to about 40% of the output of the first-stage inflator 22a. The airbag body 10 is delayed in the direction from the normal seating position.
Bulge out. In the first embodiment, as shown in FIG. 3, the time at which the second-stage inflator 22b is ignited when it is in the close sitting position is determined by the first-stage inflator 22b.
The delay time T2 is about 30 milliseconds from the ignition time a, and the delay time is about 35 milliseconds from the collision. After a series of control operations on the driver's seat side, the control flow ends (Step 15).

In Step 5, the dual stage passenger airbag device 20 is connected to the front passenger seat 4 by the position detection unit 42 interlocked with the ultrasonic sensor 40 and the passenger seat detection sensor 43 of the passenger seat position detection system 39. Is detected and sent to the airbag control unit 21.

In Step 12, the distance LD from the dual-stage passenger airbag device 20 to the occupant is reduced by the predetermined distance L1 by the deployment determination and timing determination function unit 30 of the airbag control unit 21.
It is determined whether the seating position is closer than the normal position or not.

If the seat is in the normal seating position, Step
Proceeding to 13, the driver's seat second driver section 28
Of the front passenger seat dual stage inflator 23,
The ignition current is sent to the second-stage inflator 23b.

The second-stage inflator 23b is ignited by the ignition current, and adds about 80% of the output of the base line, which is the base line, to about 40% of the output of the first-stage inflator 23a. The airbag body 14 is inflated in the direction. In the first embodiment, as shown in FIG. 4, the time at which the second-stage inflator 23b is ignited when the seat is in the normal seating position is determined by the first-stage inflator 23b.
The delay time T3 is about 10 milliseconds from the ignition time of a, and the delay time is about 19 milliseconds from the collision.

When the seating positions are close to each other,
Proceeding to Step 14, the front driver's seat dual stage inflator 23
Among them, the ignition current is sent to the second-stage inflator 23b.

The second-stage inflator 23b is ignited by the ignition current, and adds about 80% of the output of the base line, which is the base, to about 40% of the output of the first-stage inflator 23a. The airbag body 14 is delayed in the direction from the normal seating position.
Bulge out. In the first embodiment, as shown in FIG. 4, when the second-stage inflator 23b is in the close sitting position, the ignition time is set to the first-stage inflator 23b.
The delay time T4 is about 20 milliseconds from the ignition time of a, and the delay time is about 35 to 40 milliseconds from the collision. After a series of controls on the passenger seat side, the control flow ends (Step 1).
5).

As described above, the driver's seat position detection system 35 provided in front of the driver's seat 3 detects the position of the occupant seated in the driver's seat 4 and the passenger seat position detection system 39 provided in front of the passenger's seat 4. Detects the position of the occupant seated on the passenger seat 4.

The airbag control unit 21 controls the driver's seat, the passenger's seat airbag device 9, and the passenger's seat according to the occupant's seating position detected by the driver's seat and the passenger's seat position detection systems 35, 39. The ignition time of the second stage 13 is changed.

For this reason, the difference in the restraint condition between the driver's seat 3 and the passenger's seat 4 is changed at the seating position, and the ignition time of the second stage is controlled so as to be changed appropriately, so that the occupant's chest and the like can be changed. Excessive pressure on the body can be reduced.

As shown in FIGS. 8 and 9, the occupants of the driver's seat 3 and the front passenger's seat 4 both share the airbag device 1 with each other.
When the airbag control unit 21 is in the normal seating position which is at least a predetermined distance LD, LA or more from the first and second inflators 22b, 9b and 20b,
The ignition time of the 23b ignition time is controlled so that the ignition time of the dual-stage driver airbag device 19 is earlier than the ignition time of the dual-stage passenger airbag device 20.

Therefore, the pressure in the airbag body 10 of the dual-stage driver's seat airbag device 19 is immediately increased to a predetermined pressure that can be restrained, and as shown in FIG. By the time T5, the occupant who has reached the predetermined pressure (about 160 KPa) and seated on the driver's seat 3 is restrained.

Then, as shown in FIGS. 8 and 9, the occupants of the driver's seat 3 and the passenger's seat 4 are operated by the airbag devices 19 and 2 respectively.
If the vehicle is in a close state within a predetermined distance LD, LA from the zero, the airbag control unit 21
Thus, the ignition time of the second-stage inflators 22b and 23b is longer than the ignition time of the second-stage inflator 23b of the dual-stage passenger airbag device 20.
The ignition time of the second-stage inflator 22b of the dual-stage driver's seat airbag device 19 is controlled to be delayed.

Therefore, the occupant seated in the driver's seat 3 can be prevented from being pressed against the chest and the like by the early deployment of the airbag body 10 of the dual-stage driver's seat airbag device 19.

Further, the occupant sitting in the passenger seat 4 changes the inside of the airbag body 14 of the dual-stage passenger seat airbag device 20 ignited relatively early into a curve plotted by a double circle in FIG. As shown, a predetermined pressure (approximately 35
0 KPa), and the initial restraint time T7 (about 5 ms in the first embodiment) is not much different from the initial restraint time T6 in the normal sitting position (about 45 milliseconds in the first embodiment).
Within about 0 ms).

The delay time from when the first stage is ignited by the airbag control unit 21 to when the second stage is ignited is shorter than that of the dual-stage passenger airbag device 19 with respect to the dual-stage driver's seat airbag. Since the bag device 20 is controlled so as to be larger (T2> T3 and T4), when the occupant is in the driver's seat 3 close state, the occupant once hits the airbag body 10 on the driver's seat side deployed in a low pressure state. After being touched and received, the dual-stage front passenger seat airbag device 2 on the front passenger seat side
It is delayed for a time longer than 0 and waits until the occupant starts to lean backward. Then, after the occupant starts reclining backward by the recoil, pressure increase by ignition of the second-stage inflator 22 is started.

Therefore, an area e where excessive pressure is applied to the chest and the like in the driver's seat 3 shown in FIG. 3 and an excessive pressure applied to the chest and the like in the passenger seat shown in FIG. 4 are generated. It is possible to individually avoid the easy region a.

Further, the ignition time of the driver-side first-stage inflator 22a (about 9 milliseconds from the collision) is reduced by the airbag deployment control device to the ignition time of the passenger-side first-stage inflator 23a (about 5 seconds after the collision). (Milliseconds), so even if the driver takes a more extreme posture, such as clinging to the steering wheel portion 7 so that the occupant gets into the driver's seat 3, the chest, etc. may be compressed. While the rapid deployment of the airbag body 10 is avoided,
In addition, direct contact with the handle portion 7 and the like is avoided, and the occupant is received by the airbag body 10 deployed in a low pressure state. For this reason, regardless of the seated state of the occupant, the occurrence of excessive pressure on the chest shown by the area f in FIG. 3 is also avoided.

As described above, in the first embodiment, the ignition time of the second stage of the dual-stage driver's seat airbag device 19 is set separately from the ignition time of the second stage of the dual-stage passenger airbag device. The delay can be set independently by the airbag control unit 21. For this reason, even if the first-stage inflator 22a of the driver side airbag device 19 having a relatively low baseline pressure is quickly deployed, the passenger side airbag device 20 which requires a high pressure output due to its large capacity. Regardless of the ignition time of the second-stage inflator 23b, the delay control of the second-stage inflator 22b according to the seating position can be individually performed.
In the close state, the delay time T2 is set to be longer than the delay time T4, and the ignition conditions of the second-stage inflator 23b are delayed until the occupant starts to lean backward. It is possible to perform detailed deployment control in consideration of the difference.

Further, in the first embodiment, a difference is set between the first stage ignition time of the driver's seat airbag device 19 and the first stage ignition time of the passenger seat airbag device 20.
In addition, since the deviation is set for each second-stage ignition time, a rapid increase in pressure in the passenger compartment 2 can be avoided.

Although the first embodiment of the present invention has been described in detail with reference to the drawings, the specific structure is not limited to the first embodiment, and there are design changes and the like within a range not departing from the gist of the present invention. Even this is included in the present invention.

For example, in the first embodiment, the ignition delay time T4 in the second-stage proximity state on the passenger seat side is set to 20 milliseconds, and the ignition delay time in the second-stage normal seating state on the driver's seat side is set. Although it is set to be longer than 10 milliseconds of T1, the present invention is not particularly limited to this, and the same time (about 5 to 20 milliseconds) may be used as long as the time to avoid the injury is obtained.

Further, in the first embodiment, the ignition delay time T2 in the second-stage proximity state on the driver's seat side is set to 30 milliseconds, and the ignition delay time in the second-stage normal seating state on the passenger's seat side is set. Although the time T3 is set to be longer than 10 milliseconds, the present invention is not particularly limited to this. Even if the ignition delay time T2 in the second-stage proximity state on the driver's seat side is set longer, the ignition delay time T2 may be set longer. It is sufficient that the second stage is ignited after the backward leaning is started.

[0084]

As described above, according to the first aspect of the present invention, the driver's seat occupant position detecting means detects the occupant position of the driver's seat, and the passenger seat occupant position detecting means detects the driver's seat occupant position. , The passenger position of the passenger seat is detected independently.

Then, in accordance with the occupant positions detected by the driver and passenger seat occupant position detection means by the control means, the deployment start time of the driver and passenger airbag devices in the second stage is calculated as follows. Each is changed independently.

As described above, the difference in the restraint condition between the driver's seat and the passenger's seat is independently changed at the seating position, and the ignition time of the second stage is controlled so as to be appropriately changeable.
Excessive pressure on the occupant's chest etc. can be reduced.

According to the second aspect of the present invention, when the occupants in the driver's seat and the passenger's seat are at positions separated from the respective airbag devices by a predetermined distance or more, the control means controls the air in the driver's seat. The second stage deployment start time of the bag device is controlled to be earlier than the second stage deployment start time of the passenger seat airbag device.

For this reason, the driver's seat airbag device is immediately pressurized to a predetermined pressure that can be restrained, and restrains the occupant in the driver's seat.

And, according to the third aspect,
When the occupants in the driver's seat and the passenger's seat are located within a predetermined distance from each of the airbag devices by the control means, the second stage deployment start time of the driver's seat airbag device is determined by the passenger's seat It is controlled so as to be later than the deployment start time of the airbag device.

Therefore, it is possible to prevent the occupant in the driver's seat from deploying such that the occupant presses the chest or the like by the early deployment of the airbag device.

Further, the occupant in the passenger seat is restrained by the passenger airbag device which is ignited relatively early.

[0092] According to the fourth aspect of the present invention, the delay time from the start of deployment of the first stage by the control means to the start of deployment of the second stage is greater than that of the passenger airbag device. Since the driver's seat airbag device is controlled to be larger, in the close state, the occupant once touches the driver's seat airbag device and then deploys the passenger seat airbag device from the first stage to the second stage. After a delay longer than the delay time until the start, the start of the deployment of the driver's seat airbag device in the second stage is waited until the occupant tilts backward. Then, after the start of the backward tilt, the pressure increase due to the start of the second-stage deployment is started.

[0093] Therefore, it is possible to avoid regions where excessive pressure on the chest and the like is likely to occur separately in the driver's seat and the passenger's seat.

Further, according to the fifth aspect of the present invention, the control means sets the first stage deployment start time of the driver's seat to be earlier than the first stage deployment start time of the passenger seat. Therefore, for example, even if the driver is clinging to the steering wheel so that the occupant gets in the driver's seat, the rapid deployment of the airbag body that compresses the chest and the like is avoided, and the direct contact with the steering wheel and the like is avoided. Thus, the occupant can be received by the airbag deployed in a low-pressure state, which has a practically useful effect.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional perspective view of an airbag deployment control device according to a first embodiment of the present invention, illustrating a front part of a passenger compartment of a vehicle as viewed from a side of the vehicle.

FIG. 2 is a block diagram illustrating an airbag deployment control device according to the first embodiment and illustrating a connection relationship of an airbag control unit.

FIG. 3 is a graph showing an airbag deployment control device according to the first embodiment and showing a state of pressure increase in an airbag body of the dual-stage driver's seat airbag device over time.

FIG. 4 is a graph showing an airbag deployment control device according to the first embodiment and showing a state of pressure increase in the airbag body of the dual-stage passenger airbag device over time.

FIG. 5 is a control flowchart of the airbag deployment control device according to the first embodiment.

FIG. 6 is a schematic diagram showing a state in which an occupant is seated at a proper seating position when the driver's seat is viewed from the side of the vehicle in the airbag deployment control device according to the first embodiment.

FIG. 7 is a schematic diagram showing a state in which the occupant is seated at a proper seating position when the passenger seat is viewed from the side of the vehicle in the airbag deployment control device according to the first embodiment.

FIG. 8 is a schematic diagram showing a state in which an occupant is seated at a close position when the driver's seat is viewed from the side of the vehicle in the airbag deployment control device according to the first embodiment.

FIG. 9 is a schematic diagram showing a state in which the occupant is seated at a close position when the passenger seat is viewed from the side of the vehicle in the airbag deployment control device according to the first embodiment.

FIG. 10 is a perspective view illustrating the arrangement of an airbag device of a conventional example, as viewed from the passenger compartment side in a forward direction.

FIG. 11 is a graph showing a conventional example of an airbag device, and showing a general two-stage control over time.

[Explanation of symbols]

Reference Signs List 3 Driver's seat 4 Passenger's seat 19 Dual stage driver's seat airbag device 20 Dual stage passenger's seat airbag device 21 Airbag control unit (control means) 22 Driver's seat dual stage inflator (Gas generator) 22a First stage inflator 22b Second stage Inflator 23 Dual-stage inflator for passenger seat (gas generator) 23a First-stage inflator 23b Second-stage inflator 35 Driver seat position detecting system (driver seat occupant position detecting means) 39 Passenger seat position detecting system (passenger seat occupant position detecting means)

Claims (5)

[Claims] 1. A driver airbag device having a gas generator for generating a two-stage deployment output is provided in front of a driver seat, and a gas generator for generating a two-stage deployment output is provided in front of a passenger seat. A passenger seat airbag device is provided, and a driver seat occupant position detecting means for detecting an occupant position of the driver seat is provided.
In addition, a passenger seat occupant position detecting means for detecting the occupant position of the passenger seat is provided, and the two-stage driver airbag device and the passenger seat airbag device are provided in accordance with the occupant positions detected by the occupant position detecting means. An airbag deployment control device comprising control means for independently changing the eye deployment start time. 2. The control means according to claim 1, wherein when the occupants of the driver's seat and the passenger's seat are at positions separated from the respective airbag devices by a predetermined distance or more, the second stage of the driver's seat airbag device is deployed. 2. The airbag deployment control device according to claim 1, wherein the start time is controlled so as to be earlier than the second stage deployment start time of the passenger seat airbag device. 3. The control means according to claim 1, wherein when the occupants of the driver's seat and the passenger's seat are located within a predetermined distance from each of the airbag devices, the second stage deployment start time of the driver's seat airbag device is reduced. 3. The airbag deployment control device according to claim 1, wherein the control is performed so as to be later than a second stage deployment start time of the passenger seat airbag device. 4. 4. The control means according to claim 1, wherein when the occupants of the driver's seat and the passenger's seat are located within a predetermined distance from each of said airbag devices, the second stage after the first stage of each airbag device starts to be deployed. The first of each airbag device until the eyes start to deploy
And when the occupants of the driver's seat and the passenger's seat are more than a predetermined distance from each of the airbag devices, the second stage starts after the first stage of each airbag device starts to deploy. And a second delay time of each airbag device up to:
Setting and controlling a second delay time of each of the airbag devices with respect to the first delay time so that the driver's seat airbag device is larger than the passenger's seat airbag device. Any one of claims 1 to 3
An airbag deployment control device according to the above section. 5. The control means according to claim 1, wherein the first-stage deployment start time of the driver's seat is set earlier than the first-stage deployment start time of the passenger seat. The airbag deployment control device according to claim 1.