JP7020937B2 - Vehicle skeleton structure - Google Patents

Description

The present invention relates to a vehicle skeleton structure.

In Patent Document 1, in the skeleton structure of a vehicle, when an airbag (gas bag) and an inflator (gas generator) are built in a rocker (sill; hereinafter referred to as “skeleton member”) and a collision of the vehicle is detected, A technique for increasing the yield strength of a skeletal member against a collision load by inflating an airbag with this inflator is disclosed.

DE19963068A1 publication

However, in this prior art, it is necessary to send gas to the entire skeleton member, and the gas supply device such as an inflator becomes large depending on the volume, and there is room for further improvement in terms of mass and cost.

In consideration of the above facts, it is an object of the present invention to obtain a vehicle skeleton structure capable of improving the yield strength of the skeleton member on the collision region side of the colliding body and suppressing an increase in mass and an increase in cost.

The vehicle skeleton structure according to claim 1 comprises a predictive means for predicting a collision between a vehicle and a colliding body, and an extension in a skeleton member extending along a vehicle width direction or a vehicle front-rear direction, constituting a closed cross-sectional structure. An inflator, which is arranged at the center of the direction and inside the inflator and fills the skeleton member with gas when the predicting means predicts a collision with the colliding body, and an inflator provided in the skeleton member and provided in the skeleton member. Of the plurality of space portions partitioned along the extending direction of the above, an inflator control means for filling the space portion on the collision region side of the collision body with the gas of the inflator based on the prediction result by the prediction means. Have.

The vehicle skeleton structure according to claim 1 is provided with a predictive means for predicting a collision between a vehicle and a colliding body. On the other hand, the skeleton member constituting the closed cross-sectional structure extends along the vehicle width direction or the vehicle front-rear direction. An inflator is disposed at the center of the skeleton member in the extending direction and inside the inflator, and when the predictor predicts a collision with a colliding body, the inflator fills the skeleton member with gas. It has become so. Further, in the present invention, in the skeleton member, the inside is partitioned by a plurality of space portions, and the inflator gas is filled in the space portion on the collision region (site where collision is predicted) side of the colliding body. Is set to.

As a result, in the present invention, when a collision with a collision body is predicted, the internal pressure in the space portion on the collision region side of the collision body is increased in the skeleton member to strengthen the collision region side of the collision body and withstand the collision load. Can be improved.

Therefore, in the present invention, it is possible to reduce the proof stress required by the part applied in the vehicle, such as the axial compression proof stress and the bending proof stress set for the impact load at the time of designing the skeleton member. The wall thickness can be reduced. As a result, the weight of the skeleton member itself can be reduced, and the cost of the skeleton member itself can be reduced.

The vehicle skeleton structure according to claim 2 is a predictive means for predicting a collision between a vehicle and a colliding body, and inside a skeleton member extending along a vehicle width direction or a vehicle front-rear direction, constituting a closed cross-sectional structure. An inflator that is arranged and fills the skeleton member with gas when the predicting means predicts a collision with the colliding body, and an inflator provided in the skeleton member and partitioned along the extending direction of the skeleton member. Among the plurality of space portions, the inflator control means for filling the space portion on the collision region side of the collision body with the gas of the inflator based on the prediction result by the prediction means is provided, and the inflator control means is described as described above. A plurality of open / close valves, which are formed in a plurality of partition plates for partitioning the inside of the skeleton member into a plurality of space portions and are provided in the openings for communicating the adjacent space portions with each other, and each of the openings can be opened and closed. The opening / closing of the opening / closing valve is controlled, and based on the prediction result by the prediction means, the opening / closing valve located on the collision region side of the collision body is opened and the opening / closing located on the side away from the collision region of the collision body. It is configured to include a valve control unit that closes and closes the valve.

The vehicle skeleton structure according to claim 2 is provided with a predictive means for predicting a collision between a vehicle and a colliding body. On the other hand, the skeleton member constituting the closed cross-sectional structure extends along the vehicle width direction or the vehicle front-rear direction. An inflator is disposed inside the skeleton member, and when the predicting means predicts a collision with a colliding body, the inflator fills the skeleton member with gas. Further, in the present invention, in the skeleton member, the inside is partitioned by a plurality of space portions, and the inflator gas is filled in the space portion on the collision region (site where collision is predicted) side of the colliding body. Is set to.
As a result, in the present invention, when a collision with a collision body is predicted, the internal pressure in the space portion on the collision region side of the collision body is increased in the skeleton member to strengthen the collision region side of the collision body and withstand the collision load. Can be improved.
Therefore, in the present invention, it is possible to reduce the proof stress required by the part applied in the vehicle, such as the axial compression proof stress and the bending proof stress set for the impact load at the time of designing the skeleton member. The wall thickness can be reduced. As a result, the weight of the skeleton member itself can be reduced, and the cost of the skeleton member itself can be reduced.
Further , in the present invention, the inflator control means includes a plurality of open / close valves and a valve control unit. In the present invention, the inside of the skeleton member is divided into a plurality of spaces by a plurality of partition plates. An opening is formed in each of the plurality of partition plates, and the adjacent space portions communicate with each other by the opening.

Further, each opening is provided with an opening / closing valve so that the opening can be opened / closed. The opening and closing of the on-off valve is controlled by the valve control unit, and the valve control unit opens the on-off valve located on the collision region side of the colliding body and the collision occurs based on the prediction result by the predicting means. The open / close valve located on the side away from the collision area of the body is closed.

That is, in the skeleton member, the opening / closing valve located on the collision region side of the colliding body is opened, so that the space portion is filled with the inflator gas through the opening / closing valve. On the other hand, in the skeleton member, since the on-off valve located on the side away from the collision region of the colliding body is closed, the space provided with the on-off valve is closed and the inflator gas is not filled.

That is, in the present invention, in the skeleton member, the inflator gas is not filled on the side of the skeleton member away from the collision region, and the proof stress at the portion of the collision body on the collision region side is effective against the collision load. I try to raise it to. Further, by providing a plurality of partition plates inside the skeleton member, the proof stress of the skeleton member itself against a collision load is improved.

The vehicle skeleton structure according to claim 3 is the vehicle skeleton structure according to claim 1 or 2, wherein the inflator is provided at the central portion in the extending direction of the skeleton member.

For example, when the inflator is provided at one end in the extending direction of the skeleton member, the collision region of the colliding body is on the one end side in the extending direction of the skeleton member and on the other end side in the extending direction of the skeleton member. In some cases, there is a time lag when the inflator gas is filled with respect to the collision region of the colliding body.

Therefore, in the vehicle skeleton structure according to claim 3, the inflator is provided at the center of the skeleton member in the extending direction. As a result, when the collision region of the colliding body is on the one end side in the extending direction of the skeleton member and when the collision region is on the other end side in the extending direction of the skeleton member, the inflator gas is applied to the collision region of the colliding body. At the time of filling, the gas can be filled quickly and efficiently under substantially the same conditions in terms of time.

The vehicle skeleton structure according to claim 4 is the vehicle skeleton structure according to claim 2, wherein the plurality of open / close valves are attached to the inflator side of the partition plate, respectively.

When the space is filled with gas by the inflator, the partition plate is pressed by the gas ejected from the inflator. Since the on-off valve is provided in the opening formed in the partition plate, for example, when the on-off valve is provided on the side opposite to the inflator in the partition plate, the space is filled through the opening of the partition plate. The gas generated may press the on-off valve and cause the on-off valve to disengage from the opening.

Therefore, in the vehicle skeleton structure according to claim 4, the plurality of open / close valves are attached to the inflator side of the partition plate, respectively. As a result, even if the opening / closing valve is pressed by the gas filled in the space through the opening of the partition plate, the opening / closing valve is restricted from moving by the partition plate, so that the opening / closing valve is suppressed from coming off from the opening. ..

The vehicle skeleton structure according to claim 5 is the vehicle skeleton structure according to any one of claims 1 to 4, wherein the skeleton member is in the vehicle width direction at the front end portion of the vehicle in the vehicle front-rear direction. It is a bumper information that has been extended along.

In the vehicle skeleton structure according to claim 5, the skeleton member is a bumper reinforcement extending along the vehicle width direction at the front end portion of the vehicle in the vehicle front-rear direction, and the bumper reinforcement is the bumper reinforcement in the event of a frontal collision of the vehicle. In, the proof stress on the collision region side of the colliding body can be increased.

The vehicle skeleton structure according to claim 6 is the vehicle skeleton structure according to any one of claims 1 to 5, wherein the skeleton members are in the vehicle front-rear direction at both ends of the vehicle in the vehicle width direction. Each is a rocker that has been extended along.

In the vehicle skeleton structure according to claim 6, the skeleton members are rockers extending along the vehicle front-rear direction at both ends in the vehicle width direction of the vehicle, and collide in the rocker at the time of a side collision of the vehicle. The yield strength on the collision area side of the body can be increased.

As described above, in the vehicle skeleton structure according to claim 1, the present invention takes into consideration the above facts, improves the yield strength of the skeleton member on the collision region side of the colliding body, and increases the mass and cost. It has an excellent effect that it can be suppressed.

The vehicle skeleton structure according to claim 2 has a skeleton member having a proof stress on the collision region side of the collision body against a collision load by preventing the inflator gas from being filled on the side away from the collision region of the collision body. It has an excellent effect that it can be raised effectively.

The vehicle skeleton structure according to claim 3 has an excellent effect that gas can be quickly and efficiently filled in the collision region of the colliding body in the skeleton member.

The vehicle skeleton structure according to claim 4 has an excellent effect that the on-off valve can be prevented from coming off from the opening of the partition plate by the gas ejected from the inflator.

The vehicle skeleton structure according to claim 5 has an excellent effect that the yield strength of the bumper reinforcement can be effectively increased in the event of a frontal collision of the vehicle.

The vehicle skeleton structure according to claim 6 has an excellent effect that the yield strength of the rocker can be effectively increased in the event of a side collision of the vehicle.

It is a schematic plan view which shows schematic the lower part of the vehicle to which the vehicle skeleton structure which concerns on this embodiment is applied. FIG. 1 is a partially enlarged plan view in which the front end portion of the vehicle in FIG. 1 is enlarged. It is a block diagram which shows the structure of the vehicle skeleton structure which concerns on this embodiment. In FIG. 2, (A) is a plan view showing a state before the collision body collides with the right side of the bumper information, and (B) is a plan view showing a state when the collision body collides with the right side of the bumper information. It is a figure. In FIG. 2, (A) is a plan view showing a state before the collision body collides with the left side of the bumper information, and (B) is a plan view showing a state when the collision body collides with the left side of the bumper information. It is a figure. It is a block which shows the action of the vehicle skeleton structure which concerns on this embodiment. The left side of the vehicle in FIG. 1 is an enlarged partially enlarged plan view. In FIG. 7, (A) is a plan view showing a state before the collision body collides with the front part of the rocker, and (B) is a plan view showing a state when the collision body collides with the front part of the rocker. be. In FIG. 2, (A) is a plan view showing a state before the colliding body collides with the rear part of the rocker, and (B) is a plan view showing a state when the colliding body collides with the rear part of the rocker.

The vehicle lower structure according to the embodiment of the present invention will be described with reference to the drawings. The arrows FR, arrow UP, arrow RH, and arrow LH, which are appropriately described in the respective drawings, are the front direction, the upward direction, the right direction, and the left direction of the vehicle to which the vehicle floor structure according to the embodiment of the present invention is applied, respectively. Is shown. Hereinafter, when the description is simply made using the front-rear, up-down, and left-right directions, unless otherwise specified, the front-rear direction of the vehicle front-rear direction, the up-down direction of the vehicle up-down direction, and the left-right direction when facing the front direction are used.

(Structure of vehicle skeleton structure)
First, the configuration of the vehicle skeleton structure according to the present embodiment will be described.

As shown in FIG. 1, a vehicle lower portion 12 of a vehicle 11 to which the vehicle skeleton structure 10 according to the present embodiment is applied is shown. Generally, the vehicle front portion 14 of the vehicle 11 is provided with a power unit room 16, and the power unit room 16 has a pair of left and right front sides along the vehicle front-rear direction on both sides of the vehicle 11 in the vehicle width direction. Each member 18 is extended.

At the front ends of the pair of left and right front side members 18, bumper reinforcements (skeleton members) 20 extend along the vehicle width direction at the front ends of the vehicle. The bumper reinforcement 20 is a vehicle skeleton member having a closed cross-sectional structure, and is connected to a pair of left and right front side members 18 by welding, fastening, or the like. Although not shown, it goes without saying that a crash box may be separately interposed as a shock absorbing member between the front end of the front side member 18 and the bumper reinforcement 20.

On the other hand, the rear ends of the pair of left and right front side members 18 are connected to the dash panel 22, respectively. The dash panel 22 divides the power unit room 16 and the vehicle interior 24, and the front end of a floor panel (not shown) constituting the floor portion of the vehicle interior 24 is connected to the lower end of the dash panel 22 to form the dash panel 22. And the floor panel are integrated.

Further, a pair of left and right rockers (skeleton members) 26 are extended on both sides of the floor panel in the vehicle width direction along the vehicle front-rear direction, and the pair of left and right rockers 26 are in the vehicle width direction of the dash panel 22. It is directly or indirectly connected to both ends of the. The pair of left and right rockers 26 are vehicle skeleton members each having a closed cross-sectional structure.

Here, as the skeleton member in the present embodiment, the bumper reinforcement 20 and the rocker 26 can be applied. In the following description, the bumper information 20 and the rocker 26 will be described separately.

(Composition of Vampari Information)
First, the configuration of the bumper information 20 in the present embodiment will be described.

In the present embodiment, the bumper reinforcement 20 is formed of, for example, a metal such as an aluminum alloy, and has a closed cross-sectional structure formed by extrusion processing, drawing processing, or the like. A plate-shaped lid is joined to both ends of the bumper information 20 in the vehicle width direction (extending direction) by welding or the like, whereby the internal 28 of the bumper information 20 is closed. ..

Needless to say, the bumper reinforcement 20 may be made of a steel plate. When the bumper reinforcement 20 is made of a steel plate, for example, the bumper reinforcement 20 is not shown, but has a front portion constituting a front portion in the front-rear direction of the vehicle and a rear portion constituting a rear portion in the front-rear direction of the vehicle. It is divided into two parts, and the front part and the rear part are joined to each other by welding or the like.

Further, as shown in FIG. 2, in the present embodiment, the partition plates 30 and 32 are provided in the inner 28 of the bumper reinforcement 20 in order from the right side of the bumper reinforcement 20, and the partition plates 30 and 32 are provided in this order. By 32, space portions 34, 36, and 38 are provided in the bumper information 20. That is, the interior 28 of the bumper reinforcement 20 is divided into a space portion 34 and a space portion 36 by a partition plate 30, and is divided into a space portion 36 and a space portion 38 by a partition plate 32.

In the present embodiment, the positions of the partition plates 30 and 32 along the vehicle width direction of the bumper reinforcement 20 are set so that the volumes of the space portions 34, 36 and 38 are substantially the same. However, the embodiment in the present invention is not limited to this. For example, the volume of the space 36 provided in the center of the bumper information 20 in the vehicle width direction is larger than the volumes of the spaces 38 and 34 provided at both ends of the bumper information 20 in the vehicle width direction, respectively. It may be set to be. The same applies to Rocker 26, which will be described later.

Further, an inflator 40 is arranged in the space 36 located at the center of the bumper reinforcement 20 in the vehicle width direction (extending direction). The inflator 40 includes a gas generating unit (not shown), and is configured to supply gas to the inside 28 of the bumper information 20 by operating the inflator 40.

As shown in FIG. 3, the inflator 40 constitutes a part of the inflator control device 41 and is electrically connected to an ECU (Electronic Control Unit; valve control unit) 42 (described later) provided in the vehicle 11. It is operated by a signal from the ECU 42.

On the other hand, as shown in FIG. 2, openings 44 and 46 are formed in the partition plates 30 and 32 provided in the inner 28 of the bumper reinforcement 20, respectively, and a space is formed through the opening 44 of the partition plate 30. The portion 34 and the space portion 36 can be communicated with each other, and the space portion 36 and the space portion 38 can be communicated with each other through the opening 46 of the partition plate 32. The openings 44 and 46 are provided with relief valves (open / close valves) 48 and 50 that form a part of the inflator control device 41. For example, although not shown, the relief valves 48 and 50 include a main body that can be inserted into the openings 44 and 46 and a head having a diameter larger than that of the openings 44 and 46. The head is fixed (attached) to the space 36 side of the partition plates 30 and 32, that is, the inflator 40 side, respectively. The relief valves 48 and 50 can open and close the openings 44 and 46 based on the signal from the ECU 42 (see FIG. 3) described above.

Here, as shown in FIG. 3, the ECU 42 is electrically connected to, for example, a collision prediction sensor (prediction means) 52. Although not shown, the collision prediction sensor 52 includes, for example, at least one of a camera, a radar (Radar), and a rider (LIDER: Laser Imaging Detection and Ranking).

The camera is provided, for example, on the indoor side of the upper part of the windshield of the vehicle, and acquires image pickup information by photographing the external situation of the vehicle. Then, the image pickup information acquired by the camera is transmitted to the ECU 42. Further, a stereo camera is used as the camera. In the case of a stereo camera, it has two image pickup units arranged so as to reproduce binocular parallax, and the image pickup information includes information in the depth direction. The camera may be a monocular camera, but in this case, in order to detect the distance to the colliding body, for example, it is used in combination with a radar or the like described later.

On the other hand, the radar transmits radio waves (for example, millimeter waves) around the vehicle and detects the distance to the obstacle by receiving the radio waves reflected by the obstacle. Then, the obstacle information detected by the radar is transmitted to the ECU 42. In addition, the rider transmits light to the surroundings of the vehicle and receives the light reflected by the obstacle to measure the distance to the reflection point and detect the distance to the obstacle. Then, the obstacle information detected by the rider is transmitted to the ECU 42.

In the present embodiment, the relief valves 48 and 50 (open or closed) are activated based on the obstacle information from the collision prediction sensor 52. In the present embodiment, in the normal state of the relief valves 48 and 50, the relief valves 48 and 50 are set in a closed state.

Therefore, strictly speaking, in the normal state of the relief valves 48 and 50, when the relief valves 48 and 50 are operated, the relief valves 48 and 50 are opened, and when the relief valves 48 and 50 are not operated, the relief valves 48 and 50 are closed. The state will be maintained. However, in the present embodiment, for convenience of explanation, the original state of the relief valves 48 and 50 does not matter. That is, it is assumed that the relief valves 48 and 50 are opened or closed by operating the relief valves 48 and 50. Needless to say, the relief valve 48 may be set in a state where the relief valves 48 and 50 are open in a normal state.

(Action and effect of Vampari Information)
Next, the action and effect of the bumper information 20 in the present embodiment will be described.

As shown in FIG. 6, in the present embodiment, when the collision prediction sensor 52 (see FIG. 3) predicts a frontal collision of the vehicle 11 (see FIG. 4A) in step 100, the collision prediction sensor Based on the obstacle information from 52, the ECU 42 (see FIG. 3) determines whether or not a frontal collision of the vehicle 11 is unavoidable.

When it is determined in step 102 that a frontal collision of the vehicle 11 is unavoidable, the relief valves 48 and 50 (see FIG. 3) are operated by the ECU 42 in step 104 (described later). When the relief valves 48 and 50 are opened and closed by the operation of the relief valves 48 and 50, the inflator 40 is operated in step 106, and the vehicle 11 collides with the collision body A in step 108.

Specifically, for example, as shown in FIG. 4A, the right side of the bumper information 20 (collision region of the collision body A) is the collision body A based on the obstacle information from the collision prediction sensor 52. When it is predicted that a collision will occur (relative to (relative to)) (steps 100 and 102 in FIG. 6), the relief valve 48 provided in the opening 44 of the partition plate 30 is opened by the ECU 42, and the partition plate 32 is opened. The relief valve 50 provided in the opening 46 of the above is closed (step 104 in FIG. 6).

As a result, the opening 44 is opened and the opening 46 is closed, and in the bumper reinforcement 20, the space 34 and the space 36 communicate with each other through the opening 44, and the space 38 is closed. Will be done. In this state, as shown in FIG. 4B, the inflator 40 operates and the gas in the inflator 40 is ejected (step 106 in FIG. 6).

Since the inflator 40 is arranged in the space 36 of the bumper information 20, the gas ejected by the operation of the inflator 40 flows from the space 36 into the space 34 through the opening 44. Then, in the bumper reinforcement 20, the space 36 and the space 34 are filled with the gas in the inflator 40, and then the vehicle 11 collides with the colliding body A (step 108 in FIG. 6).

That is, in the present embodiment, before the vehicle 11 collides with the collision body A, the gas in the inflator 40 is filled in the space 36 and the space 34 of the bumper reinforcement 20 shown in FIG. 4 (B). There is. As a result, in the bumper reinforcement 20, the internal pressure in the space 34 located on the collision region side of the collision body A increases, the collision region side of the collision body A is strengthened, and the proof stress against the collision load is improved.

On the other hand, as shown in FIG. 5A, the left side of the valve relief 20 (the collision region of the collision body A) becomes the collision body A based on the obstacle information from the collision prediction sensor 52 (see FIG. 3). In the case where a collision is predicted (steps 100 and 102 in FIG. 6), the relief valve 48 provided on the partition plate 30 side is closed by the ECU 42 (see FIG. 3) and is provided on the partition plate 32 side. The relief valve 50 is opened (step 104 in FIG. 6).

As a result, in the bumper reinforcement 20, the space portion 34 is closed and the space portion 36 and the space portion 38 communicate with each other through the opening 46. In this state, as shown in FIG. 5B, the inflator 40 operates and the gas in the inflator 40 is ejected (step 106 in FIG. 6).

The gas ejected from the inflator 40 flows from the space 36 through the opening 46 into the space 38. Then, in the bumper reinforcement 20, the space 36 and the space 38 are filled with the gas in the inflator 40, and then the vehicle 11 collides with the colliding body A (step 108 in FIG. 6).

That is, in the present embodiment, before the vehicle 11 collides with the collision body A, the gas in the inflator 40 is filled in the space 36 and the space 38 in the bumper reinforcement 20 shown in FIG. 5 (B). Has been done. As a result, in the bumper reinforcement 20, the internal pressure in the space 38 located on the collision region side of the collision body A increases, the collision region side of the collision body A is strengthened, and the proof stress against the collision load is improved.

Although not shown, when it is predicted that the central portion (collision region of the collision body) of the bumper reinforcement 20 in the vehicle width direction will collide with the collision body A based on the obstacle information from the collision prediction sensor 52 ( In steps 100 and 102) in FIG. 6, the relief valves 48 and 50 are closed, and the space portion 34 and the space portion 38 are closed (step 104 in FIG. 6).

Therefore, the gas of the inflator 40 is filled only in the space 36 in the bumper reinforcement 20 (step 106 in FIG. 6), and after the space 36 is filled with gas, the vehicle 11 collides with the collision body A. (Step 108 in FIG. 6).

That is, in the present embodiment, before the vehicle 11 collides with the collision body A, the gas in the inflator 40 is filled in the space 36 in the bumper reinforcement 20. As a result, in the bumper reinforcement 20, the internal pressure in the space 36 located on the collision region side of the collision body A increases, the collision region side of the collision body A is strengthened, and the proof stress against the collision load is improved.

Generally, bumper reinforcements are designed based on the yield strength required for a vehicle frontal collision. Here, in a frontal collision of a vehicle, a symmetric collision in which the entire front surface of the vehicle collides (hereinafter referred to as "full wrap collision") and an asymmetric collision in which one side of the front surface of the vehicle collides (hereinafter referred to as "offset collision") are compared. If so, in bumpy reinforcement, an offset collision requires greater resistance to a frontal collision of the vehicle than a full lap collision.

Among the offset collisions, the frontal collision outside the vehicle width direction (hereinafter referred to as "small lap collision") requires a larger yield strength in the bumper reinforcement. Therefore, the bumper reinforcement is designed in consideration of the proof stress required for this minute lap collision.

Thus, when the bumper information is designed based on the yield strength required for a small lap collision, compared to when the bumper information is designed based on the yield strength required for a full lap collision. Then, in order to increase the proof stress of the bumper reinforcement, for example, the wall thickness is set to be thick. In this way, if the wall thickness of the bumper information is increased, the mass of the bumper information itself increases by that amount, and the cost of the bumper information itself also increases.

On the other hand, in the present embodiment, when a collision with a collision body is predicted, the yield strength of the collision body on the collision region side in the bumper reinforcement is increased.

That is, in the present embodiment, for example, as shown in FIG. 4B described above, when a collision with the collision body A is predicted, the space portion 34 on the collision region side of the collision body A in the bumper information 20 It is possible to increase the internal pressure inside to strengthen the collision region side of the collision body A and improve the resistance to the frontal collision of the vehicle 11.

Therefore, in the present embodiment, at the time of designing the bumper reinforcement 20, the proof stress set against the frontal collision of the vehicle can be lowered, and the wall thickness can be reduced accordingly. As a result, the weight of the bumper information 20 itself can be reduced, and the cost of the bumper information 20 itself can be reduced.

Further, in the present embodiment, in order to fill a part of the bumper information 20 with the gas of the inflator 40, the gas of the inflator 40 is filled in the entire bumper information 20. In comparison, the inflator 40 can be miniaturized.

Further, in the present embodiment, as shown in FIG. 3, in the bumper reinforcement 20 (see FIG. 2), the inflator control device 41 that controls the proof stress against a collision includes an ECU 42 and a plurality of relief valves 48 and 50. There is. Further, in the present embodiment, as shown in FIG. 2, the interior 28 of the bumper reinforcement 20 is divided into a plurality of space portions 34, 36, 38 by a plurality of partition plates 30 and 32. Then, openings 44 and 46 are formed in the plurality of partition plates 30 and 32, respectively, and the adjacent space portions 34 and 36 are communicated by the openings 44, and the openings 46 communicate with each other. The adjacent space portion 36 and the space portion 38 communicate with each other.

Relief valves 48 and 50 are provided in the openings 44 and 46, respectively, so that the openings 44 and 46 can be opened and closed, respectively. The opening and closing of the relief valves 48 and 50 is controlled by the ECU 42, and the ECU 42 of the collision body A, for example, as shown in FIG. 4A, based on the prediction result by the collision prediction sensor 52. The relief valve 48 located on the collision region side is opened, and the relief valve 50 located on the side away from the collision region of the collision body A is closed.

That is, in the bumper reinforcement 20, the relief valve 48 located on the collision region side of the colliding body A is opened, so that the space 34 is filled with the gas of the inflator 40 through the relief valve 48. On the other hand, in the bumper reinforcement 20, the relief valve 50 located on the side away from the collision region of the collision body A is closed, so that the space 38 provided with the relief valve 50 is closed and the gas of the inflator 40 is closed. Is not filled.

That is, in the present embodiment, in the bumper reinforcement 20, the side of the collision body A away from the collision region is not filled with the gas of the inflator 40, and the portion of the collision body on the collision region side with respect to the collision load. I am trying to effectively increase the bearing capacity in. Further, in the present embodiment, by providing the plurality of partition plates 30 and 32 inside the bumper reinforcement 20, the proof stress of the bumper reinforcement 20 itself against the collision load is improved.

Further, in the present embodiment, the inflator 40 is arranged in the space 36 located at the center of the bumper reinforcement 20 in the vehicle width direction (extending direction). For example, although not shown, when the inflator 40 is provided at one end of the bumper information 20 in the vehicle width direction, the collision region of the collision body A is on the one end side of the bumper information 20 in the vehicle width direction, and the bumper. There is a time lag when the inflator 40 is filled with the collision region of the collision body A with respect to the case where the reinforcement 20 is on the other end side in the vehicle width direction.

Therefore, in the present embodiment, as shown in FIG. 2, the inflator 40 is arranged in the space 36 located at the center of the bumper reinforcement 20 in the vehicle width direction, so that the collision body A collides. When the region is one end side of the bumper reinforcement 20 in the vehicle width direction and the other end side of the bumper reinforcement 20 in the vehicle width direction, the collision region of the collision body A is filled with the gas of the inflator 40. At that time, the gas can be filled quickly and efficiently under substantially the same conditions in terms of time.

By the way, as shown in FIG. 2, when the space 34 is filled with gas by the inflator 40, the partition plates 30 and 32 are pressed by the gas ejected from the inflator 40. Since the relief valves 48 and 50 are provided in the openings 44 and 46 formed in the partition plates 30 and 32, for example, in the partition plates 30 and 32, the relief valves 48 and 50 are on the opposite side of the inflator 40. Is provided, the relief valves 48 and 50 are pressed by the gas filled in the spaces 34 and 38 through the openings 44 and 46 of the partition plates 30 and 32, and the relief valves 48 and 50 are opened in the openings 44. , 46 may deviate.

Therefore, in the present embodiment, although not shown, the heads of the relief valves 48 and 50 are fixed to the space 36 side of the partition plates 30 and 32, that is, to the inflator 40 side, respectively. Therefore, for example, even if the relief valve 48 is pressed by the gas filled in the space portion 34 through the opening 44 of the partition plate 30, the head of the relief valve 48 is in contact with the partition plate 30. The partition plate 30 restricts the movement of the relief valve 48. Therefore, according to the present embodiment, the relief valve 48 is prevented from coming off from the opening 44. The relief valve 50 is the same as the relief valve 48.

Further, in the present embodiment, the inside 28 of the bumper information 20 is closed, but when the gas in the inflator 40 is ejected, sufficient blockage is ensured in the bumper information 20 so that the internal pressure increases. Therefore, the inside 28 of the bumper information 20 is not limited to a completely closed state. The same applies to the rocker 26 described below as in the bumper information 20.

Further, in the present embodiment, as shown in FIG. 2, openings 44 and 46 are formed in the partition plates 30 and 32 for partitioning the inside of the bumper reinforcement 20, respectively, and relief valves 48 are formed in the openings 44 and 46, respectively. By providing 50 so that the openings 44 and 46 can be opened and closed, the gas in the inflator 40 is filled in the predetermined space. However, the present invention is not limited to this, as it is sufficient that the gas in the inflator 40 can be filled in the predetermined space. For example, although not shown, a plurality of valves may be provided in the inflator itself, and by opening the predetermined valves, the partitioned predetermined space and the inside of the inflator may communicate with each other.

(Composition of Rocka)
On the other hand, the configuration of the rocker in the present embodiment will be described.

The rocker 26 in the present embodiment also has the same configuration as the bumper information 20. That is, the rocker 26 is also formed of a metal such as an aluminum alloy, and has a closed cross-sectional structure formed by extrusion processing, drawing processing, or the like.

A plate-shaped lid is joined to both ends of the rocker 26 in the vehicle front-rear direction (extending direction) by welding or the like, whereby the inside 54 of the rocker 26 is closed. Needless to say, the rocker 26 may also be made of a steel plate in the same manner as the bumper information 20. When the rocker 26 is made of a steel plate, for example, although not shown, the rocker 26 is divided into an outer portion constituting the outer side in the vehicle width direction and an inner portion constituting the inner portion in the vehicle width direction, and the outer portion is formed. And the inner part are joined to each other by welding or the like.

Further, in the present embodiment, the inner 54 of the rocker 26 is provided with partition plates 56, 58 in order from the front side of the rocker 26, similarly to the bumper reinforcement 20, and the partition plates 56, 58 provide the rocker. Space portions 60, 62, and 64 are provided in 26.

That is, the inside 54 of the rocker 26 is divided into a space portion 60 and a space portion 62 by a partition plate 56, and is divided into a space portion 62 and a space portion 64 by a partition plate 58. The inflator 66 is arranged in the space 62 located at the center of the rocker 26 in the front-rear direction of the vehicle.

Further, openings 68 and 70 are formed in the partition plates 56 and 58, respectively, so that the space 60 and the space 62 can communicate with each other through the openings 68 of the partition plate 56, and the openings of the partition plate 58 can be communicated with each other. The space section 62 and the space section 64 can be communicated with each other through the section 70. Relief valves (open / close valves) 72 and 74 that form a part of the inflator control device 41 are attached to the openings 68 and 70, respectively, and the relief valves 72 and 74 are the inflators of the partition plates 56 and 58. It is attached to each of the 66 sides.

Further, these relief valves 72 and 74 are electrically connected to the ECU 42, respectively, and the openings 68 and 70 can be opened and closed based on the signal from the ECU 42. Since the action of the relief valves 72 and 74 in the opening / closing operation is substantially the same as that of the relief valves 48 and 50, the description thereof will be omitted.

(Action and effect of rocker)
In addition, the action and effect of rocker in this embodiment will be described. The explanation of the contents substantially the same as those of Vampari Information 20 will be omitted.

In this embodiment, for example, as shown in FIG. 8A, a case where a side collision of the vehicle 11 is predicted based on obstacle information from the collision prediction sensor 52 will be described. Here, when it is predicted that the front side of the rocker 26 (collision region of the collision body B) collides with the collision body B (relative to the collision body B) based on the obstacle information by the collision prediction sensor 52, the ECU 42 attaches the partition plate 56 to the partition plate 56. The relief valve 72 provided is opened, and the relief valve 74 provided on the partition plate 58 is closed.

As a result, the opening 68 is opened and the opening 70 is closed, and in the rocker 26, the space 60 and the space 62 communicate with each other through the opening 68, and the space 64 is closed. In this state, as shown in FIG. 8B, the inflator 66 operates and the gas in the inflator 66 is ejected.

Since the inflator 66 is arranged in the space 62 of the rocker 26, the gas ejected by the operation of the inflator 66 flows from the space 62 into the space 60 through the opening 68. Then, in the rocker 26, after the space portion 62 and the space portion 60 are filled with the gas in the inflator 66, the vehicle 11 collides with the collision body B.

That is, in the present embodiment, the gas in the inflator 66 is filled in the space 62 and the space 60 of the rocker 26 shown in FIG. 8B before the vehicle 11 collides with the collision body B. As a result, in the rocker 26, the internal pressure in the space 60 located on the collision region side of the collision body B increases, the collision region side of the collision body B is strengthened, and the proof stress against the collision load is improved.

On the other hand, as shown in FIG. 9A, when the rear part of the rocker 26 (collision region of the collision body B) collides with the collision body B based on the obstacle information from the collision prediction sensor 52 (see FIG. 3). When predicted, the ECU 42 (see FIG. 3) closes the relief valve 72 provided on the partition plate 56 side and opens the relief valve 74 provided on the partition plate 58 side.

As a result, in the rocker 26, the space portion 60 is closed and the space portion 62 and the space portion 64 communicate with each other through the opening 70. In this state, as shown in FIG. 9B, the inflator 66 operates and the gas in the inflator 66 is ejected.

The gas ejected from the inflator 66 flows from the space 62 through the opening 70 into the space 64. Then, in the rocker 26, the space portion 62 and the space portion 64 are filled with the gas in the inflator 66, and then the vehicle 11 collides with the colliding body B.

That is, in the present embodiment, before the vehicle 11 collides with the collision body B, the gas in the inflator 66 is filled in the space portion 62 and the space portion 64 in the rocker 26 shown in FIG. 9B. There is. As a result, in the rocker 26, the internal pressure in the space 64 located on the collision region side of the collision body B increases, the collision region side of the collision body B is strengthened, and the proof stress against the collision load is improved.

Although not shown, if it is predicted that the central portion (collision region of the collision body) of the rocker 26 in the vehicle front-rear direction collides with the collision body B based on the obstacle information from the collision prediction sensor 52, relief is achieved. The valves 72 and 74 are closed, and the space 60 and the space 64 are closed. Therefore, the gas of the inflator 66 is filled only in the space 62 in the rocker 26, and after the gas is filled in the space 62, the vehicle 11 collides with the colliding body B.

As described above, in the present embodiment, as in the bumpy information 20, the gas in the inflator 66 is filled in the space 62 in the rocker 26 before the vehicle 11 collides with the collision body B. As a result, in the rocker 26, the internal pressure in the space 60 located on the collision region side of the collision body B increases, the collision region side of the collision body B is strengthened, and the proof stress against the collision load is improved.

Therefore, in the present embodiment, at the time of designing the rocker 26, the proof stress set against the side collision of the vehicle can be lowered, and the wall thickness can be reduced by that amount. As a result, the weight of the rocker 26 itself can be reduced, and the cost of the rocker 26 itself can be reduced.

Further, in the present embodiment, as in the case of the bumper information 20, the inflator 66 can be downsized as compared with the case where the gas of the inflator 66 is filled in the entire rocker 26.

Further, in the present embodiment, as in the case of the bumper reinforcement 20, the side of the collision body B away from the collision region is not filled with the gas of the inflator 66, and the collision load is applied to the side of the collision body B on the collision region side. I am trying to effectively increase the bearing capacity at the site. Further, in the present embodiment, by providing the plurality of partition plates 56 and 58 inside the rocker 26, the proof stress of the rocker 26 itself against the collision load is improved.

Further, in the present embodiment, the inflator 40 is arranged in the space 36 located at the center of the rocker 26 in the vehicle front-rear direction (extending direction), so that the collision region of the collision body A is in front of the rocker 26. When the gas of the inflator 66 is filled in the collision region of the collision body B in the case of the partial side and the case of the rear side of the rocker 26, the gas is quickly and efficiently filled under substantially the same time conditions. Can be made to.

In the present embodiment, the bumper information 20 and the rocker 26 are applied and described as the skeleton member in the present invention, but the present invention is not limited to this, and only one of the bumper information 20 and the rocker 26 is used. May be applied.

Although an example of the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above, and one embodiment and various modifications may be used in combination as appropriate, and the present invention may be used. Of course, it can be carried out in various embodiments as long as it does not deviate from the gist of the above.

10 Vehicle skeleton structure 11 Vehicle 12 Vehicle lower part (vehicle)
14 Vehicle front (vehicle)
20 Vampari Information (skeleton member)
26 Rocker (skeleton member)
30 Partition plate 32 Partition plate 34 Space part 36 Space part 38 Space part 40 Inflator 41 Inflator control device (inflator control means)
42 ECU (valve control unit, inflator control means)
44 Opening 46 Opening 48 Relief valve (open / close valve, inflator control means)
50 Relief valve (open / close valve, inflator control means)
52 Collision prediction sensor (prediction means)
56 Partition plate 58 Partition plate 60 Space part 62 Space part 64 Space part 66 Inflator 68 Opening 70 Opening 72 Relief valve (open / close valve, inflator control means)
74 Relief valve (open / close valve, inflator control means)
A collision body B collision body

Claims (6)

Predictive means for predicting a collision between a vehicle and a collision body,
A skeletal member that constitutes a closed cross-sectional structure and is extended along the vehicle width direction or the vehicle front-rear direction is arranged at the center of the extension direction and inside the skeleton member, and the prediction means predicts a collision with the collision body. An inflator that fills the skeletal member with gas when
Of the plurality of spaces provided in the skeleton member and partitioned along the extending direction of the skeleton member, the inflator is placed in the space on the collision region side of the collision body based on the prediction result by the prediction means. Inflator control means to fill the gas and
Vehicle skeleton structure with. Predictive means for predicting a collision between a vehicle and a collision body,
It is disposed inside a skeleton member that constitutes a closed cross-sectional structure and extends along the vehicle width direction or the vehicle front-rear direction, and when the predicting means predicts a collision with the collision body, gas is contained in the skeleton member. With an inflator to fill
Of the plurality of spaces provided in the skeleton member and partitioned along the extending direction of the skeleton member, the inflator is placed in the space on the collision region side of the collision body based on the prediction result by the prediction means. Inflator control means to fill the gas and
Equipped with
The inflator control means is
A plurality of opening / closing valves formed in a plurality of partition plates for partitioning the inside of the skeleton member into a plurality of space portions, respectively, provided in openings for communicating the adjacent space portions, and allowing the openings to be opened / closed. ,
The opening / closing valve is controlled to open / close, and the opening / closing valve located on the collision region side of the collision body is opened and the opening / closing valve located on the side away from the collision region of the collision body is opened based on the prediction result by the prediction means. The valve control unit that closes the valve and
The vehicle skeleton structure is configured to include. The vehicle skeleton structure according to claim 1 or 2, wherein the inflator is provided at the center of the skeleton member in the extending direction. The vehicle skeleton structure according to claim 2, wherein each of the plurality of on-off valves is attached to the inflator side of the partition plate. The vehicle skeleton structure according to any one of claims 1 to 4, wherein the skeleton member is a bumper reinforcement extending along the vehicle width direction at a front end portion of the vehicle in the vehicle front-rear direction. The vehicle skeleton structure according to any one of claims 1 to 5, wherein the skeleton member is a rocker extending along the vehicle front-rear direction at both ends of the vehicle in the vehicle width direction.

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