WO2011128971A1 - 歩行者衝突検出装置 - Google Patents
歩行者衝突検出装置 Download PDFInfo
- Publication number
- WO2011128971A1 WO2011128971A1 PCT/JP2010/056588 JP2010056588W WO2011128971A1 WO 2011128971 A1 WO2011128971 A1 WO 2011128971A1 JP 2010056588 W JP2010056588 W JP 2010056588W WO 2011128971 A1 WO2011128971 A1 WO 2011128971A1
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- WIPO (PCT)
- Prior art keywords
- bumper
- chamber member
- width direction
- vehicle
- vehicle width
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
- B60R19/483—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds with obstacle sensors of electric or electronic type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/04—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
- B60R2019/188—Blow molded structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R2019/1886—Bumper fascias and fastening means therefor
Definitions
- the present invention relates to a pedestrian collision detection device for detecting a pedestrian collision with a vehicle bumper.
- an absorber disposed on the vehicle front side of the bumper reinforcement and deformed at the time of the collision, a chamber member whose inside is a pressure chamber, a pressure sensor for detecting a pressure change in the pressure chamber,
- a device comprising:
- the front end of the chamber member is configured to be located on the vehicle rear side with respect to the front end of the absorber, and the pressure change in the chamber is suppressed during a light collision to improve the pedestrian discrimination performance (for example, , See Patent Document 1).
- JP 2009-18734 A JP 2009-18734 A
- this structure does not consider pedestrian detection near the bumper corner, and there is room for improvement in terms of pedestrian detection performance. Note that it is possible to detect a collision with a pedestrian in a wide range in the vehicle width direction by extending the bumper reinforcement outward in the vehicle width direction, but this causes an increase in weight and cost.
- the present invention has an object to obtain a pedestrian collision detection device that can improve the pedestrian detection performance near the bumper corner portion in consideration of the above facts.
- the pedestrian collision detection device includes a bumper reinforcement arranged with a vehicle width direction as a longitudinal direction, and arranged outside the bumper reinforcement in the front-rear direction of the vehicle and in the bumper reinforcement.
- the bumper reinforcement vehicle is applied to a bumper cover that includes a bumper cover that is arranged with the vehicle width direction along the longitudinal direction and whose both ends in the longitudinal direction are bent inward in the vehicle front-rear direction.
- a chamber member disposed adjacent to the outer surface in the front-rear direction and disposed along the bumper reinforcement with the vehicle width direction as a longitudinal direction, and the inside of which is a pressure chamber; and the chamber member, A pressure detector for outputting a signal corresponding to a pressure change in the pressure chamber, and the pressure detector;
- a collision determination unit that determines whether or not the vehicle has collided with a pedestrian based on an output, and a vehicle width direction outer side terminal portion of the chamber member is a bumper corner portion side on the vehicle width direction of the bumper reinforcement It goes around so as to cover the outer end face, and is configured to compress and deform inward in the vehicle width direction when a load of a predetermined value or more is input from the bumper cover side at the time of collision.
- the chamber member when the pedestrian collides with the vehicle bumper, the chamber member is pressed via the bumper cover. At this time, the pressure in the pressure chamber changes, and this pressure change is detected by the pressure detector.
- the collision determination unit determines whether or not the vehicle has collided with a pedestrian based on the output of the pressure detector.
- the end portion of the chamber member on the outer side in the vehicle width direction wraps around to cover the end surface on the outer side in the vehicle width direction of the bumper reinforcement on the bumper corner portion side, and the bumper cover side has a predetermined value or more from the bumper cover side in a collision
- the bumper cover side has a predetermined value or more from the bumper cover side in a collision
- the terminal portion of the chamber member is The pressure in the pressure chamber changes due to compression deformation inward in the width direction.
- a spacer disposed on a back surface of the bumper cover at a portion corresponding to the terminal portion of the chamber member, and the bumper cover And a bumper absorber for shock absorption disposed in parallel with the chamber member in a range excluding the terminal portion of the chamber member with the vehicle width direction as a longitudinal direction, and being interposed between the bumper reinforcement and the bumper reinforcement.
- the spacer is disposed on the back surface of the bumper cover at a site corresponding to the terminal portion of the chamber member. For this reason, when a pedestrian collides with the bumper cover in the vicinity of the bumper corner portion of the vehicle bumper, a load is input to the end portion of the chamber member via the spacer disposed on the bumper cover. Thereby, the collision load at the time of collision is appropriately transmitted to the pressure chamber.
- an impact absorbing bumper absorber interposed between the bumper cover and the bumper reinforcement is disposed in parallel with the chamber member in a range excluding the terminal portion of the chamber member with the vehicle width direction as the longitudinal direction. For this reason, when a pedestrian collides with the center of the vehicle bumper in the vehicle width direction, the chamber member is compressed and deformed in the vehicle longitudinal direction as the bumper absorber is compressed and deformed via the bumper cover. On the other hand, when the pedestrian collides with the bumper cover in the vicinity of the bumper corner portion of the vehicle bumper, the end portion of the chamber member is compressed and deformed inward in the vehicle width direction as the bumper cover is bent and deformed. Therefore, by adjusting the bending stiffness of the bumper cover at the bumper corner to the same level as the FS characteristic (load-stroke characteristic) of the bumper absorber, it is possible to accurately detect a collision with a pedestrian even near the bumper corner. .
- a spacer disposed on a back surface of the bumper cover at a portion corresponding to the terminal portion of the chamber member, and the bumper cover And a bumper absorber for shock absorption disposed in parallel with the chamber member in a range including the terminal portion of the chamber member with the vehicle width direction as a longitudinal direction, and being interposed between the bumper reinforcement and the bumper reinforcement. And a notch is formed in the flange portion of the arcuate wheel arch formed at both ends in the longitudinal direction of the bumper cover.
- the spacer is disposed on the back surface of the bumper cover at the portion corresponding to the terminal portion of the chamber member. For this reason, when a pedestrian collides with the bumper cover in the vicinity of the bumper corner portion of the vehicle bumper, a load is input to the end portion of the chamber member via the spacer disposed on the bumper cover. Thereby, the collision load at the time of collision is appropriately transmitted to the pressure chamber.
- an impact absorbing bumper absorber interposed between the bumper cover and the bumper reinforcement is disposed in parallel with the chamber member in a range including the terminal portion of the chamber member with the vehicle width direction as the longitudinal direction.
- a notch is formed in the flange portion of the arc-shaped wheel arch formed at both ends in the longitudinal direction of the bumper cover.
- caps are attached to both end surfaces of the bumper reinforcement on the outer side in the vehicle width direction, and the chamber is provided in the cap.
- a surface facing the spacer via the member is parallel to the vehicle longitudinal direction.
- caps are attached to both end surfaces of the bumper reinforcement on the outer side in the vehicle width direction, and the surfaces of the caps facing the spacers via the chamber members are front and rear of the vehicle. Since the direction is parallel to the direction, the terminal portion of the chamber member does not have to form a negative angle with respect to the vehicle longitudinal direction. For this reason, the end portion of the chamber member can be molded without undercut.
- the pedestrian collision detection device has an excellent effect that the pedestrian detection performance near the bumper corner can be improved.
- the bending rigidity of the bumper cover at the bumper corner portion is adjusted to be equal to the FS characteristic of the bumper absorber, so that the walking at the bumper corner portion is also possible. It is possible to detect a collision with a person with high accuracy.
- the pedestrian collision detection device by adjusting the FS characteristic of the bumper absorber in the bumper corner, the collision with the pedestrian can be detected with high accuracy also in the bumper corner. It has an excellent effect of being able to.
- the pedestrian collision detection device has an excellent effect that the terminal portion of the chamber member can be formed without undercut.
- FIG. 2 is an enlarged vertical sectional view showing a front bumper to which the pedestrian collision detection apparatus according to the first embodiment of the present invention is applied, showing a state cut along line 2A-2A in FIG.
- FIG. 2 is an enlarged longitudinal sectional view showing a front bumper to which the pedestrian collision detection device according to the first embodiment of the present invention is applied, showing a state cut along line 2B-2B in FIG.
- FIG. 2 is an enlarged vertical sectional view showing a front bumper to which the pedestrian collision detection device according to the first embodiment of the present invention is applied, showing a state cut along line 2B-2B in FIG.
- FIG. 2 is an enlarged longitudinal sectional view showing a front bumper to which the pedestrian collision detection apparatus according to the first embodiment of the present invention is applied, and shows a state cut along line 2C-2C in FIG. It is a disassembled perspective view for demonstrating attachment to the bumper cover of the spacer shown by FIG.
- FIG. 2 is a cross-sectional plan view showing a deformed state of a front bumper corner when a collision with a pedestrian occurs in the configuration shown in FIG.
- It is a plane sectional view showing a schematic structure of a pedestrian collision detection device concerning a 2nd embodiment of the present invention, and shows only the right half of a vehicle width direction.
- FIGS. A pedestrian collision detection apparatus according to a first embodiment of the present invention will be described with reference to FIGS.
- an arrow FR appropriately shown indicates the vehicle front side
- an arrow UP indicates the vehicle upper side
- an arrow IN indicates the vehicle width direction inner side.
- FIG. 1 is a schematic cross-sectional view showing a schematic configuration of a pedestrian collision detection apparatus 10 (pedestrian detection system) according to the present embodiment.
- the pedestrian collision detection device 10 has a substantially left-right symmetric structure in a plan view of the vehicle, and FIG. 1 shows only the right half in the vehicle width direction.
- the pedestrian collision detection device 10 is applied to a front bumper 12 as a vehicular bumper disposed at the front end of an automobile, and determines whether or not there is a collision with the front bumper 12. It has become. This will be specifically described below.
- the front bumper 12 includes a bumper reinforcement 14 which is a bumper skeleton member.
- the bumper reinforcement 14 is formed, for example, by extrusion molding using a metal material such as iron or aluminum, and is configured as a skeleton member arranged with the vehicle width direction as a longitudinal direction.
- the bumper reinforcement 14 is supported with respect to the vehicle body across the front ends 16A of the pair of left and right front side members 16 constituting the skeleton member on the vehicle body side.
- the front bumper 12 includes a bumper cover 18 that covers the bumper reinforcement 14 from the outside in the vehicle front-rear direction, that is, from the front side of the vehicle.
- the bumper cover 18 is made of a resin material or the like, and is disposed along the bumper reinforcement 14 with the vehicle width direction as the longitudinal direction, and both ends in the longitudinal direction are in the vehicle front-rear direction inner side, that is, the vehicle rear side in the vehicle plan view. It has a bent shape.
- the front bumper 12 is provided with bumper corner portions 12A including the corners 18C of the bumper cover 18 on both ends in the vehicle width direction.
- the bumper corner portion 12A indicates an area where the front bumper 12 is deformed inward in the vehicle width direction when a pedestrian on the vehicle front side and the front bumper 12 collide.
- the bumper corner portion 12 ⁇ / b> A points to an end portion on the outer side in the vehicle width direction with respect to the front side member 16 in the front bumper 12. Further, the bumper cover 18 is fixedly supported to the vehicle body at a portion not shown so that a space S is formed between the bumper cover 18 and the bumper reinforcement 14.
- the chamber member 20 is disposed in the space S between the bumper reinforcement 14 and the bumper cover 18 in the front bumper 12.
- the chamber member 20 is formed by blow molding or the like, and is configured as a hollow structure that is disposed along the bumper reinforcement 14 with the vehicle width direction as a longitudinal direction. It is disposed adjacent to a certain front surface 14A and is fixedly attached to the front surface 14A.
- the terminal portion 20A on the vehicle width direction outer side of the chamber member 20 wraps around the bumper reinforcement 14 on the vehicle width direction outer side end surface 14B on the bumper corner portion 12A side.
- the terminal portion 20A of the chamber member 20 includes an extending portion 120A that extends inward in the vehicle width direction.
- a front surface 220A of the extended portion 120A faces the end surface 14B of the bumper reinforcement 14 on the outer side in the vehicle width direction.
- the chamber member 20 is rigidly attached to the bumper reinforcement 14 as described above, and has a rigidity capable of maintaining its hollow cross-sectional shape.
- the communication hole communicated with the atmosphere at a position (not shown). have.
- FIG. 2A shows an enlarged cross-sectional view taken along line 2A-2A in FIG.
- the inside of the pressure chamber 22 which is the internal space of the chamber member 20 shown in FIG. 2A is normally (statically) atmospheric pressure.
- the chamber member 20 is crushed while receiving a comparatively low compressive load from the front of the vehicle and escaping air from the communication hole, and the volume of the pressure chamber 22 is reduced while dynamically changing the internal pressure of the pressure chamber 22.
- the end portion 20A of the chamber member 20 shown in FIG. 1 is compressed and deformed inward in the vehicle width direction by obtaining a reaction force from the bumper reinforcement 14 when a load of a predetermined value or more is inputted from the bumper cover 18 side at the time of collision. It is configured to
- a spacer 30 is disposed at a portion corresponding to the end portion 20A of the chamber member 20 on the back surface 18A of the bumper cover 18.
- the spacer 30 is made of a material having high mechanical strength.
- FIG. 3 shows an exploded perspective view of the structure for attaching the spacer 30 to the bumper cover 18 before the spacer 30 is attached to the bumper cover 18.
- a pair of upper and lower flange portions 30 ⁇ / b> A is formed on the attachment base side of the spacer 30.
- the bumper cover 18 to which the spacer 30 is attached is formed with a pair of upper and lower rail portions 32 on the back surface 18A side on both sides in the vehicle width direction along the longitudinal direction of the bumper cover 18. .
- the flange portion 30 ⁇ / b> A of the spacer 30 is inserted into a rail portion 32 formed on the back surface 18 ⁇ / b> A side of the bumper cover 18 and is fixed to the bumper cover 18 with a fastener 34.
- the opposing surfaces of the spacer 30 and the end portion 20 ⁇ / b> A of the chamber member 20 are parallel to the vehicle longitudinal direction.
- the pedestrian collision detection device 10 includes a pressure detector 24 (pressure sensor) disposed on the inner surface of the chamber member 20 on the vehicle rear side which is the inner side in the vehicle front-rear direction.
- a pressure detector 24 pressure sensor
- FIG. 1 the pressure detector 24 on the right side in the vehicle width direction is illustrated, but the left side in the vehicle width direction is also symmetrical to the pressure detector 24 illustrated in FIG.
- a pressure detector (not shown) is provided.
- Each pressure detector 24 is configured to output the same signal for the same pressure, and is configured to output a signal corresponding to a pressure change in the pressure chamber 22 to an ECU 26 as a collision determination unit described later. Yes.
- a bumper absorber 28 for shock absorption is interposed between the bumper cover 18 and the front surface 14A of the bumper reinforcement 14 on the inner side in the vehicle width direction than the bumper corner portion 12A.
- the bumper absorber 28 is fixedly attached to the lower front portion of the bumper reinforcement 14 independently of the chamber member 20, and is parallel to the chamber member 20 in a range excluding the terminal portion 20 ⁇ / b> A in the chamber member 20 with the vehicle width direction as the longitudinal direction. It is arranged.
- the end surface of the bumper absorber 28 on the outer side in the vehicle width direction is indicated by reference numeral 28 ⁇ / b> D.
- FIGS. 2A, 2B, and 2C show an enlarged cross-sectional view taken along line 2B-2B in FIG. 1
- FIG. 2C shows an enlarged cross-sectional view taken along line 2C-2C in FIG.
- the bumper absorber 28 is attached to the bumper reinforcement 14, and the absorber main body 28A located on the vehicle lower side of the chamber member 20 and the vehicle front side of the chamber member 20 The rear end 28C of the absorber main body 28A is fixed to the front surface 14A of the bumper reinforcement 14.
- the bumper absorber 28 is made of urethane foam or the like, and compresses and deforms against frontal collision to absorb impact energy. Therefore, the pedestrian collision detection apparatus 10 is configured to be compressed so that the volume of the pressure chamber 22 in the chamber member 20 is reduced as the bumper absorber 28 is compressed and deformed.
- the ECU 26 shown in FIG. 1 is electrically connected to the pressure detector 24, and determines whether or not the pedestrian and the front bumper 12 collide based on the output signal of the pressure detector 24. It has become. In this embodiment, the ECU 26 determines whether or not the pedestrian and the front bumper 12 have collided based on the pressure waveforms that are the detection values of the two pressure detectors 24.
- the ECU 26 is set with a first threshold value Pt1 and a second threshold value Pt2 (> Pt1) that is larger than the first threshold value Pt1.
- the ECU 26 When the detected value of any one of the two pressure detectors 24 exceeds the first threshold value Pt1, and the detected value of the other one of the two pressure detectors 24 exceeds the second threshold value Pt2, the ECU 26 The front bumper 12 and the pedestrian are determined to have collided with each other.
- the pressure detector (24) detects a pressure corresponding to the collision load and outputs a signal corresponding to the collision load.
- the ECU (26) allows the effective mass (so-called effective mass) of the collision object. Is calculated.
- the ECU (26) determines that the collision target is a pedestrian.
- the chamber member 20 When the pedestrian (leg part) 36 indicated by a two-dot chain line in FIG. 1 collides with the front bumper 12, the chamber member 20 is pressed through the bumper cover 18. At this time, the pressure in the pressure chamber 22 (see FIG. 2A and the like) changes, and the pressure detector 24 detects this pressure change. The ECU 26 determines whether or not the vehicle collides with the pedestrian 36 based on the output of the pressure detector 24.
- the terminal portion 20A on the vehicle width direction outer side of the chamber member 20 wraps around to cover the end surface 14B on the vehicle width direction outer side of the bumper reinforcement 14 on the bumper corner portion 12A side.
- a load greater than or equal to a predetermined value is input from the 18th side, a reaction force is obtained from the bumper reinforcement 14 and is compressed and deformed inward in the vehicle width direction. Therefore, as shown in FIG. 4, the pedestrian 36 collides with the bumper cover 18 in the vicinity of the bumper corner portion 12A of the front bumper 12, and reaches the terminal portion 20A of the chamber member 20 through the bumper cover 18 with a predetermined value or more.
- the terminal portion 20A of the chamber member 20 obtains a reaction force from the bumper reinforcement 14 and compressively deforms inward in the vehicle width direction, thereby changing the pressure in the pressure chamber 22 (see FIG. 2C).
- the spacer 30 is disposed on the back surface 18 ⁇ / b> A of the bumper cover 18 at a site corresponding to the terminal portion 20 ⁇ / b> A of the chamber member 20. Therefore, as shown in FIG. 4, when the pedestrian 36 collides with the bumper cover 18 in the vicinity of the bumper corner portion 12 ⁇ / b> A of the front bumper 12, the chamber member 20 of the chamber member 20 is interposed via the spacer 30 disposed on the bumper cover 18. A load is input to the terminal unit 20A. Thereby, since the collision load at the time of collision is appropriately transmitted to the pressure chamber 22 and the pressure chamber 22 is effectively crushed, the sensing performance in the vicinity of the bumper corner portion 12A is improved.
- an impact absorbing bumper absorber 28 interposed between the bumper cover 18 and the bumper reinforcement 14 has a terminal in the chamber member 20 with the vehicle width direction as the longitudinal direction.
- the chamber member 20 is disposed in parallel to the range excluding the portion 20A. Therefore, when the pedestrian 36 collides with the center side of the front bumper 12 in the vehicle width direction, the chamber member 20 is compressed to the vehicle rear side as the bumper absorber 28 is compressed and deformed via the bumper cover 18.
- FIG. 4 when the pedestrian 36 collides with the bumper cover 18 in the vicinity of the bumper corner portion 12A of the front bumper 12, as the bumper cover 18 is bent and deformed, as shown in FIG. Thus, the chamber member 20 is compressed and deformed inward in the vehicle width direction.
- the bumper corner portion 12A can also collide with the pedestrian 36. It can be detected with high accuracy.
- comparison is made in a range in which both ends of the bumper reinforcement and the chamber member in the vehicle width direction are rounded and include the terminal side of the bumper corner portion.
- the chamber member can obtain a reaction force on the bumper reinforcement.
- pedestrian detection performance can be ensured, but on the other hand, there is a disadvantage that increases weight and increases costs.
- the structure which makes the bumper reinforcement 14 shorter than the said contrast structure is applied, a pedestrian detection performance is ensured, suppressing a weight increase and cost increase.
- the pedestrian detection performance near the bumper corner portion 12A can be improved.
- FIG. 5 The schematic structure of the pedestrian collision detection apparatus 40 which concerns on the 2nd Embodiment of this invention is shown by FIG. 5 with typical flat sectional drawing.
- caps 42 are attached to both end surfaces 14B of the bumper reinforcement 14 on the outer side in the vehicle width direction, and the terminal portion 44A of the chamber member 44 has a first implementation. It differs from the pedestrian collision detection apparatus 10 (refer FIG. 1) which concerns on 1st Embodiment by the point by which the extension part 120A (refer FIG. 1) in a form is not formed.
- Other configurations are substantially the same as those of the first embodiment. Therefore, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- the chamber member 44 has substantially the same configuration as the chamber member 20 (see FIG. 1) in the first embodiment except that there is no extending portion 120 ⁇ / b> A (see FIG. 1). It has become.
- a terminal portion 44A on the outer side in the vehicle width direction of the chamber member 44 wraps around to cover the end surface 14B on the outer side in the vehicle width direction of the bumper reinforcement 14 on the bumper corner portion 12A side.
- the cap 42 attached to the both end surfaces 14B of the bumper reinforcement 14 on the outer side in the vehicle width direction has a surface 42A facing the spacer 30 via the terminal portion 44A of the chamber member 44 parallel to the vehicle longitudinal direction. That is, at the time of a collision, when a load of a predetermined value or more is input from the bumper cover 18 side to the end portion 44A of the chamber member 44 via the spacer 30, the end portion 44A of the chamber member 44 is connected to the bumper reinforcement 14 via the cap 42. It is configured to obtain a reaction force on the side and compress and deform inward in the vehicle width direction.
- the same operations and effects as those of the first embodiment described above can be obtained, and the terminal portion 44A of the chamber member 44 does not have to form a negative angle with respect to the vehicle longitudinal direction. Therefore, the terminal portion 44A of the chamber member 44 can be formed without undercut.
- the cap 42 has a surface 42A facing the spacer 30 through the terminal portion 44A of the chamber member 44 parallel to the vehicle front-rear direction.
- the concept of “no” is not completely parallel to the longitudinal direction of the vehicle, but may not be completely parallel to the longitudinal direction of the vehicle. The case where it is recognized that substantially the same operation and effect as the case where the vehicle is arranged is obtained and is substantially parallel to the vehicle longitudinal direction is also included.
- FIG. 6 is a perspective view of a front end portion of a vehicle to which a pedestrian collision detection device 50 according to the third embodiment of the present invention is applied.
- the configuration of the present embodiment is substantially the same as that of the first embodiment except for the points described below. Therefore, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- a bumper absorber 52 for shock absorption is interposed between the bumper cover 18 and the bumper reinforcement 14.
- the bumper absorber 52 is fixedly attached to the lower front portion of the bumper reinforcement 14 independently of the chamber member 20, and is parallel to the chamber member 20 within a range including the terminal portion 20A of the chamber member 20 with the vehicle width direction as the longitudinal direction. It is arranged. Both ends of the bumper absorber 52 on the outer side in the vehicle width direction are located in a range including the bumper corner portion 12A.
- the bumper absorber 52 includes an absorber body 52A corresponding to the absorber body 28A (see FIGS. 2B and 2C) in the first embodiment, and a spacer section 52B corresponding to the spacer portion 28B (see FIG. 2A) in the first embodiment.
- the absorber main body 52A is disposed below the terminal portion 20A of the chamber member 20 at both ends in the vehicle width direction.
- the bumper absorber 52 is the same as the bumper absorber 28 (see FIG. 1) in the first embodiment except for the constituent materials. Further, in FIG. 6, a portion of the spacer portion 52 ⁇ / b> B on the center side in the vehicle width direction is cut out.
- arc-shaped wheel arches 54 are formed at both ends in the longitudinal direction of the bumper cover 18, and the flanges 54 ⁇ / b> A of the wheel arch 54 are easily broken at both ends in the longitudinal direction of the bumper cover 18.
- a notch 56 (notch) is formed in the upper portion.
- the bumper cover 18 when a pedestrian collides with the bumper cover 18 near the bumper corner portion 12A of the front bumper 12, the bumper cover 18 is surrounded by a two-dot chain line 58 starting from the notch portion 56. It is easily deformed so as to be recessed. Therefore, the deformation mode toward the inner side in the vehicle width direction is stably realized, and the deformation load of the bumper cover 18 is suppressed. For this reason, by adjusting the FS characteristic (load-stroke characteristic) of the absorber main body 52A of the bumper absorber 52 in the bumper corner portion 12A, the bumper corner portion 12A can accurately detect a collision with a pedestrian. The That is, according to the configuration of the present embodiment, the pedestrian detection performance in the vicinity of the bumper corner portion 12A can be improved.
- the pedestrian collision detection devices 10, 40, 50 are provided with the spacers 30 at portions corresponding to the terminal portions 20 ⁇ / b> A, 44 ⁇ / b> A of the chamber members 20, 44 on the back surface 18 ⁇ / b> A of the bumper cover 18.
- the pedestrian collision detection device may be configured such that the spacer 30 is not provided.
- the pedestrian collision detection device includes, for example, a chamber member 44 in the second embodiment shown in FIG. 5 instead of the chamber member 20 as a modification of the third embodiment, and a cap 42. May be attached to both end surfaces of the bumper reinforcement 14 on the outer side in the vehicle width direction, and a surface 42A of the cap 42 facing the spacer 30 via the chamber member 44 may be parallel to the vehicle longitudinal direction. According to such a configuration, the same operation and effect as those of the third embodiment described above can be obtained, and the terminal portion 44A of the chamber member 44 does not have to form a negative angle with respect to the vehicle longitudinal direction. 44 terminal portions 44A can be formed without undercutting.
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
本発明の第1の実施形態に係る歩行者衝突検出装置について図1~図4を用いて説明する。なお、これらの図において適宜示される矢印FRは車両前方側を示しており、矢印UPは車両上方側を示しており、矢印INは車両幅方向内側を示している。
次に、上記実施形態の作用及び効果について説明する。
次に、本発明の第2の実施形態に係る歩行者衝突検出装置40について、図5を用いて説明する。図5には、本発明の第2の実施形態に係る歩行者衝突検出装置40の概略構成が模式的な平断面図にて示されている。この図に示されるように、歩行者衝突検出装置40は、バンパリインフォースメント14の車両幅方向外側の両端面14Bにキャップ42が取り付けられると共に、チャンバ部材44の端末部44Aには第1の実施形態における延設部120A(図1参照)が形成されていない点で、第1の実施形態に係る歩行者衝突検出装置10(図1参照)とは異なる。他の構成は、第1の実施形態とほぼ同様の構成となっている。よって、第1の実施形態と実質的に同様の構成部については、同一符号を付して説明を省略する。
次に、本発明の第3の実施形態に係る歩行者衝突検出装置50について、図6を用いて説明する。図6には、本発明の第3の実施形態に係る歩行者衝突検出装置50が適用された車両の前端部が斜視図にて示されている。なお、本実施形態の構成は、以下に説明する点を除いて、第1の実施形態とほぼ同様の構成となっている。よって、第1の実施形態と実質的に同様の構成部については、同一符号を付して説明を省略する。
なお、上記実施形態では、歩行者衝突検出装置10、40、50が車両用バンパとしてのフロントバンパ12に適用された例を示したが、本発明はこれに限定されず、例えば、上記各構成を前後反転して車両用バンパとしてのリヤバンパに適用してもよい。
Claims (4)
- 車両幅方向を長手方向として配置されたバンパリインフォースメントと、
前記バンパリインフォースメントの車両前後方向外側に配置されると共に前記バンパリインフォースメントに沿って車両幅方向を長手方向として配置され、かつ長手方向の両端部が車両前後方向内側へ曲げられたバンパカバーと、
を含んで構成された車両用バンパに適用され、
前記バンパリインフォースメントの車両前後方向の外側面に隣接して配置されると共に前記バンパリインフォースメントに沿って車両幅方向を長手方向として配置され、かつ内部が圧力チャンバとされたチャンバ部材と、
前記チャンバ部材に配置され、前記圧力チャンバ内の圧力変化に応じた信号を出力する圧力検出器と、
前記圧力検出器の出力に基づいて歩行者と衝突したか否かを判定する衝突判定部と、
を有し、前記チャンバ部材の車両幅方向外側の端末部は、バンパコーナー部側で前記バンパリインフォースメントの車両幅方向外側の端面を覆うように回り込み、衝突時に前記バンパカバー側から所定値以上の荷重が入力されると車両幅方向内側に圧縮変形するよう構成された歩行者衝突検出装置。 - 前記バンパカバーの裏面において前記チャンバ部材の前記端末部に対応する部位に配設されたスペーサと、
前記バンパカバーと前記バンパリインフォースメントとの間に介在されると共に車両幅方向を長手方向として前記チャンバ部材における前記端末部を除く範囲で前記チャンバ部材と並列に配設された衝撃吸収用のバンパアブソーバと、
を有する請求項1記載の歩行者衝突検出装置。 - 前記バンパカバーの裏面において前記チャンバ部材の前記端末部に対応する部位に配設されたスペーサと、
前記バンパカバーと前記バンパリインフォースメントとの間に介在されると共に車両幅方向を長手方向として前記チャンバ部材における前記端末部を含む範囲で前記チャンバ部材と並列に配設された衝撃吸収用のバンパアブソーバと、
を有し、前記バンパカバーにおける長手方向の両端部に形成された円弧状のホイールアーチのフランジ部には切欠部が形成されている請求項1記載の歩行者衝突検出装置。 - 前記バンパリインフォースメントの車両幅方向外側の両端面にキャップが取り付けられ、前記キャップにおいて前記チャンバ部材を介して前記スペーサと対向する面が車両前後方向に平行をなしている請求項2又は請求項3に記載の歩行者衝突検出装置。
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CN201080067393.8A CN102939222B (zh) | 2010-04-13 | 2010-04-13 | 行人碰撞检测装置 |
JP2012510490A JP5360295B2 (ja) | 2010-04-13 | 2010-04-13 | 歩行者衝突検出装置 |
PCT/JP2010/056588 WO2011128971A1 (ja) | 2010-04-13 | 2010-04-13 | 歩行者衝突検出装置 |
EP10849809.8A EP2559597B1 (en) | 2010-04-13 | 2010-04-13 | Pedestrian collision detection device |
US13/640,375 US8864196B2 (en) | 2010-04-13 | 2010-04-13 | Pedestrian collision detection device |
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JP5360295B2 (ja) | 2013-12-04 |
CN102939222A (zh) | 2013-02-20 |
EP2559597A4 (en) | 2013-10-30 |
US20130127190A1 (en) | 2013-05-23 |
US8864196B2 (en) | 2014-10-21 |
CN102939222B (zh) | 2014-09-17 |
EP2559597A1 (en) | 2013-02-20 |
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