WO2012101810A1 - 自動車の前部構造 - Google Patents
自動車の前部構造 Download PDFInfo
- Publication number
- WO2012101810A1 WO2012101810A1 PCT/JP2011/051676 JP2011051676W WO2012101810A1 WO 2012101810 A1 WO2012101810 A1 WO 2012101810A1 JP 2011051676 W JP2011051676 W JP 2011051676W WO 2012101810 A1 WO2012101810 A1 WO 2012101810A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dilatant
- crash box
- shock absorber
- side member
- axial compression
- 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
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
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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
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/36—Combinations of yieldable mounting means of different types
Definitions
- the present invention relates to an automobile front structure, and more particularly to an automobile front structure in which a crash box is disposed between a front side member and a front bumper reinforcement.
- a crash box welded to the rear wall portion of the front bumper reinforcement is attached to an overhang portion provided on the left and right radiator support sides.
- the crush box remaining margin is set to be larger than the longitudinal dimension of the cooling system parts, and the impact energy is absorbed by deforming (damaging) only the crash box and the front bumper reinforcement at the time of a light collision. This prevents the cooling system parts from being damaged during a light collision, and improves the damage resistance and repairability of the front part of the vehicle body.
- the impact received by the occupant from the seat belt or airbag increases.
- a deformation stroke energy absorption amount
- the floor G after the middle of the collision is reduced by abruptly increasing (starting up) the deceleration of the vehicle body floor (hereinafter referred to as “floor G”) at the beginning of the collision.
- floor G the deceleration of the vehicle body floor
- the floor G does not increase sharply until the crash box is completely crushed, that is, until the axial compression deformation amount of the crash box is maximized, so there is room for improvement in this respect. .
- the present invention can improve the damage resistance and repairability of the front part of the vehicle body, and can rapidly increase the floor G before the amount of axial compression deformation of the crash box is maximized. It aims to provide a front structure.
- the front structure of an automobile according to the invention described in claim 1 is disposed between a front end of a front side member of the automobile and a front bumper reinforcement, and is set to have a lower proof strength against an axial compression load than the front side member.
- the crash box is made of a material having a dilatant characteristic, and is disposed between the front end of the front side member and the front bumper reinforcement, and between the two, a frontal collision of the automobile Space for allowing axial compression deformation of the crash box at the time is provided, and when the amount of axial compression deformation of the crash box exceeds a set value smaller than the maximum value, a compression load is received between the two
- a dilatant shock absorber having a longitudinal dimension set in the vehicle longitudinal direction, That.
- a crash box and a dilatant shock absorber are disposed between the front end of the front side member and the front bumper reinforcement.
- a space for allowing axial compression deformation (plastic deformation) of the crash box at the time of a frontal collision of the automobile is provided between the dilatant shock absorber and one of the front side member and the front bumper reinforcement.
- this dilatant shock absorber has a compressive load between the front side member and the front bumper reinforcement when the amount of axial compression deformation of the crash box exceeds a set value (preset value) smaller than its maximum value.
- the length dimension in the vehicle front-rear direction is set so as to be received.
- the dilatant shock absorber receives a compressive load (impact force) between the front bumper reinforcement and the front side member.
- the dilatant shock absorber instantly absorbs energy and hardens, and the collision load that the front side member receives suddenly increases.
- the floor G can be rapidly increased before the amount of axial compression deformation of the crash box becomes maximum.
- the dilatant shock absorber when the amount of axial compression deformation of the crash box is less than the set value, that is, when the collision speed of the automobile is low (light collision), the dilatant shock absorber will not receive a compressive load and Collision energy is absorbed by axial compression deformation. As a result, the front side member is prevented from being damaged, so that the damage resistance and repairability of the front portion of the vehicle body can be improved.
- a front structure of an automobile according to a second aspect of the present invention is the front structure of an automobile according to the first aspect, wherein the crash box is formed in a cylindrical shape having an opening on the front side member side, and the dilatant impact The absorber is accommodated in the crash box and fixed to the front end surface of the front side member.
- the dilatant shock absorber is housed in the crash box, it is not necessary to set a new space for mounting the dilatant shock absorber. In addition, normally, the soft dilatant shock absorber can be protected by the crash box.
- a front structure of an automobile according to a third aspect of the invention is the front structure of an automobile according to the second aspect, wherein the dilatant shock absorber is formed in a shape similar to the cross-sectional shape of the peripheral wall of the crash box. Are arranged coaxially with the peripheral wall.
- the dilatant shock absorber accommodated in the cylindrical crash box is similar to the sectional shape of the peripheral wall of the crash box (for example, a cylinder having a rectangular or hexagonal sectional shape). And is arranged coaxially with the peripheral wall. Thereby, the load from the front bumper reinforcement can be satisfactorily transmitted to the front side member via the hardened dilatant shock absorber. Moreover, since the dilatant shock absorber is formed in a cylindrical shape (hollow shape), the weight of the dilatant shock absorber can be reduced. In addition, “on the same axis” described in claim 3 does not have to be strictly on the same axis, and some errors in design or manufacturing are allowed.
- the front structure of an automobile according to the invention described in claim 4 is the front structure of the automobile according to claim 2 or claim 3, wherein the front wall structure of the automobile is between the peripheral wall of the crash box and the dilatant shock absorber.
- a gap is formed to prevent the peripheral wall and the dilatant shock absorber from interfering with each other during axial compression deformation of the crash box.
- the front structure of an automobile according to a fifth aspect of the present invention is the front structure of an automobile according to any one of the second to fourth aspects, wherein the crash box is located on the front bumper reinforcement side.
- the bottom wall is formed into a bottomed cylindrical shape, the bottom wall is provided with a bulging portion bulging toward the dilatant shock absorber side, and the amount of axial compression deformation of the crash box is the set value If it becomes above, the said bulging part is comprised so that it may collide with the said dilatant shock absorber.
- the bulging part which bulged to the side is provided.
- This bulging portion collides with the dilatant shock absorber when the amount of axial compression deformation of the crash box exceeds a set value, and hardens the dilatant shock absorber. That is, in the present invention, the set value for curing the dilatant shock absorber can be set (adjusted) by the dimension of the bulging portion in the vehicle front-rear direction. Therefore, the degree of freedom of setting is improved as compared with the case where the dimensions of the peripheral wall of the crash box and the dimensions of the dilatant shock absorber are changed.
- the front structure of an automobile according to the present invention can improve the damage resistance and repairability of the front part of the vehicle body, and the floor G before the axial compression deformation amount of the crash box is maximized. Can be increased rapidly.
- FIG. 1 is a perspective view of a dilatant shock absorber that is a constituent member of a front structure of an automobile according to an embodiment of the present invention. It is a longitudinal cross-sectional view corresponding to FIG. 1 for demonstrating the amount of axial compression deformation of the crash box when the motor vehicle which concerns on embodiment of this invention carries out the offset rigid barrier collision of 15 kilometers per hour. It is a longitudinal cross-sectional view corresponding to FIG. 1 for demonstrating the amount of axial compression deformation of the crash box when the motor vehicle which concerns on embodiment of this invention carries out the offset rigid barrier collision of 25 km / h. It is a longitudinal cross-sectional view corresponding to FIG.
- the arrow FR indicates the front of the vehicle
- the arrow UP indicates the upper side of the vehicle.
- a front bumper reinforcement 12 is disposed along the vehicle width direction at the front end of the front body of the vehicle body.
- the front bumper reinforcement 12 is made of, for example, an extruded material of an aluminum alloy.
- a pair of left and right front side members 14 constituting the skeleton of the vehicle body are disposed (for convenience of explanation, only one front side member 14 is shown in FIG. Have been).
- These front side members 14 are disposed at lower portions of both ends in the vehicle width direction, and have a closed cross-sectional structure extending in the vehicle front-rear direction.
- a metal panel 14 ⁇ / b> A whose outer peripheral portion protrudes in a flange shape is welded to the front end of each front side member 14.
- a crash box 16 is coaxially connected to the front side member 14 in front of the vehicle with a panel 14A interposed therebetween.
- the crash box 16 is formed of an aluminum alloy or the like, and has a bottom wall 16A provided on the front bumper reinforcement 12 side, and is formed in a rectangular tube shape with a bottom that opens on the front side member 14 side.
- the height dimension of the crash box 16 along the vehicle vertical direction is set to be larger than the width dimension of the crash box 16 along the vehicle width direction.
- the crash box 16 has a peripheral wall 16B having a rectangular cross section when viewed from the front-rear direction of the vehicle, and a flange portion (not shown) provided on the opening side of the peripheral wall 16B is bolted to the panel 14A of the front side member 14. It is fastened and fixed by etc.
- the bottom wall 16A of the crash box 16 is a bulging portion 18 whose central portion bulges toward the vehicle rear side.
- the bulging portion 18 has a flat rear end surface disposed substantially perpendicular to the vehicle longitudinal direction.
- a recess 20 is formed at a position corresponding to the bulging portion 18 on the front side of the bottom wall 16A.
- a rear end portion of the front bumper reinforcement 12 is fitted into the recess 20.
- the front bumper reinforcement 12 is welded to the crash box 16, and the crash box 16 is disposed between the front bumper reinforcement 12 and the front side member 14.
- the crash box 16 described above is set to have a lower proof strength against the axial compression load (that is, the compression load along the vehicle longitudinal direction) than the front side member 14. For this reason, when the automobile has a frontal collision, the crash box 16 undergoes axial compression deformation (plastic deformation) before the front side member 14.
- a dilatant shock absorber 24 is accommodated inside the crash box 16.
- the dilatant shock absorber 24 is made of a material having a dilatant characteristic, for example, “d3o TM ” manufactured by d3o TM lab, UK.
- This “d3o TM ” is a material that is flexible when no impact is applied or when the impact is weak, but instantly cures when a strong impact is applied, and exhibits excellent energy absorption performance.
- the dilatant shock absorber 24 is formed in a rectangular tube shape that is similar to the cross-sectional shape of the peripheral wall 16B of the crash box 16 (see FIG. 2).
- the dilatant shock absorber 24 is arranged coaxially with the peripheral wall 16B, and the rear end surface thereof is fixed to the panel 14A of the front side member 14 by means such as adhesion.
- a gap 26 is formed between the dilatant shock absorber 24 and the peripheral wall 16B of the crash box 16 to prevent the peripheral wall 16B and the dilatant shock absorber 24 from interfering when the crush box 16 is axially compressed and deformed. .
- the dilatant shock absorber 24 is set such that the height dimension H along the vehicle vertical direction and the width dimension W along the vehicle width direction are set smaller than the bulging portion 18 described above, and the front end surface bulges. It faces the rear end surface of the portion 18.
- the dilatant shock absorber 24 has a length dimension L1 along the vehicle front-rear direction, and a length dimension along the vehicle front-rear direction from the rear end face of the bulging portion 18, that is, the rear end face of the bottom wall 16A to the panel 14A. It is set to be sufficiently shorter (for example, about half) than L2. Thereby, a space 28 for allowing the axial compression deformation of the crash box 16 is provided between the dilatant shock absorber 24 and the front bumper reinforcement 12.
- the length L1 of the dilatant shock absorber 24 is such that the crush box 16 is completely crushed by the collision load, that is, after the bulging portion 18 in the state where the axial compression deformation amount of the crush box 16 is maximized. It is set larger than the length dimension along the vehicle front-rear direction from the end surface to the panel 14A. That is, when the crash box 16 is completely crushed, the bulging portion 18 is retracted to the position indicated by the one-dot chain line P1 in FIG. 1, but the length dimension L1 of the crash box 16 is from the one-dot chain line P1 to the panel 14A. It is set to be larger than the straight line distance L3 along the vehicle longitudinal direction (in FIG. 1, the alternate long and short dash line P0 indicates the position of the rear end surface of the bulging portion 18 before the crash box 16 is crushed).
- the rear end surface of the bulging portion 18 collides with the front end surface of the dilatant shock absorber 24 before the axial compression deformation amount of the crash box 16 at the time of the frontal collision of the automobile reaches the maximum value L4. It is supposed to be. In other words, when the amount of axial compression deformation of the crash box 16 becomes equal to or larger than the set value L5 that is smaller than the maximum value L4 (when the bulging portion 18 moves back to the position indicated by the one-dot chain line P2 in FIG. 1), the bulging portion The rear end surface of 18 collides with the front end surface of the dilatant shock absorber 24.
- This set value L5 is set in consideration of damage resistance and repairability (so-called damage ability) of the front part of the vehicle body at the time of a light collision, and passenger protection performance at the time of a collision with a high collision speed.
- the bulging portion 18 is retracted to the position shown in FIG. That is, in this collision mode, the material and the dimensions of the crash box 16 and the length dimension L1 of the dilatant shock absorber 24 are set so that the amount of axial compression deformation of the crash box 16 does not reach the set value L5. ing. In this case, the bulging portion 18 does not collide with the dilatant shock absorber 24, and only the crash box 16 undergoes axial compression deformation.
- the bulging portion 18 moves backward to the position shown in FIG. That is, in this collision mode, the material and the dimensions of the crash box 16 and the length dimension L1 of the dilatant shock absorber 24 are set so that the amount of axial compression deformation of the crash box 16 is equal to or greater than the set value L5. ing. In this case, the bulging portion 18 collides with the dilatant shock absorber 24 so that the dilatant shock absorber 24 receives a compression load (impact force) between the front bumper reinforcement 12 and the front side member 14. .
- the airbag device mounted on the automobile when the automobile collides with a full-wrap rigid barrier at a speed of 25 km / h or more, the airbag device mounted on the automobile is configured to operate.
- the crash box 16 is axially compressed and deformed by the load from the front bumper reinforcement 12, and the bulging portion 18 moves backward to the position shown in FIG.
- the bulging portion 18 collides with the dilatant shock absorber 24, and the dilatant shock absorber 24 receives a compression load (impact force) between the front bumper reinforcement 12 and the front side member 14.
- the dilatant shock absorber 24 absorbs energy instantaneously and hardens, and the collision load received by the front side member 14 increases rapidly.
- the floor G deceleration of the vehicle body floor
- the dilatant shock absorber 24 when the automobile has a full wrap rigid barrier collision of 25 km / h or more, the dilatant shock absorber 24 is hardened, so that the collision load received by the front side member 14 increases rapidly. In the initial stage of the collision, the floor G rises steeply.
- FIG. 6 is a diagram showing the relationship between the floor G and time when the automobile according to the comparative example 100 has a full lap rigid barrier collision at 56 km / h. Is a region where the shaft is compressively deformed.
- the maximum value of the occupant deceleration that rises after the middle of the collision becomes larger.
- the value derived by the single integration of the floor G that is, the speed of the occupant with respect to the vehicle body floor increases.
- the maximum value of the occupant deceleration when the occupant is restrained by the seat belt or the airbag is increased, and the impact received by the occupant from the seat belt or the airbag is increased.
- FIG. 7 is a diagram showing the relationship between the floor G and time when the automobile according to this embodiment has a full-lap rigid barrier collision at 56 km / h.
- the dilatant shock absorber 24 is accommodated in the crash box 16, it is not necessary to set a new space for mounting the dilatant shock absorber 24.
- the soft dilatant shock absorber 24 can be protected by the crash box 16 at normal times.
- the dilatant shock absorber 24 accommodated in the cylindrical crash box 16 is formed in a rectangular tube shape similar to the cross-sectional shape of the peripheral wall 16B of the crash box 16, and is coaxial with the peripheral wall 16B. Is placed on top. Thereby, the load from the front bumper reinforcement 12 can be satisfactorily transmitted to the front side member 14 via the hardened dilatant shock absorber 24. Moreover, since the dilatant shock absorber 24 is formed in a cylindrical shape (hollow shape), the weight of the dilatant shock absorber 24 can be reduced.
- a gap between the dilatant shock absorber 24 and the peripheral wall 16B of the crash box 16 prevents the peripheral wall 16B and the dilatant shock absorber 24 from interfering during axial compression deformation of the crash box 16. 26 is formed. Thereby, it can prevent that the dilatant shock absorber 24 hardens
- the crash box 16 is formed in a bottomed cylindrical shape, and a bulging portion 18 bulging toward the dilatant shock absorber 24 is provided on the bottom wall 16A of the crash box 16. .
- the bulging portion 18 collides with the dilatant shock absorber 24 and hardens the dilatant shock absorber 24 when the amount of axial compression deformation of the crash box 16 reaches the set value L5 or more.
- the set value L5 for curing the dilatant shock absorber 24 can be set (adjusted) by the dimension along the vehicle front-rear direction of the bulging portion 18, so the dimension of the peripheral wall 16B of the crash box 16 and the dilatant
- the degree of freedom of setting is improved as compared with the case where the dimensions of the shock absorber 24 are changed.
- the crash box 16 is formed in a bottomed cylindrical shape.
- the invention according to claims 1 to 4 is not limited thereto, and the bottom wall 16A of the crash box 16 is omitted.
- the crush box 16 may be formed in a simple cylindrical shape.
- the bulging portion 18 is provided on the bottom wall 16A of the crash box 16.
- the invention according to claims 1 to 4 is not limited thereto, and the bulging portion 18 is omitted. It may be configured as described above.
- the peripheral wall 16B of the crash box 16 is formed in a bellows shape.
- the configuration according to claims 1 to 5 is not limited thereto, and the bellows is omitted. Good.
- the peripheral wall 16B has a rectangular cross-sectional shape.
- the invention according to claims 1 to 5 is not limited to this.
- the peripheral wall 16B has a hexagonal cross-sectional shape.
- the configuration may be a circular shape.
- the shape of the crash box 16 can be changed as appropriate.
- the dilatant shock absorber 24 is formed in a shape similar to the cross-sectional shape of the peripheral wall 16B of the crash box 16 and is arranged coaxially with the peripheral wall 16B.
- the invention which concerns on this is not restricted to this, The shape and arrangement
- the dilatant shock absorber 24 is housed in the crash box 16, but the invention according to claim 1 is not limited to this, and the dilatant shock absorber is the front end of the front side member 14. And the front bumper reinforcement 12 may be used.
- the dilatant shock absorber 24 is fixed to the front end surface of the front side member 14.
- the invention according to claim 1 is not limited to this, and the dilatant shock absorber 24 is the crash box 16.
- the bottom wall 16A may be fixed to the bottom wall 16A.
- the dilatant shock absorber 24 may be fixed to the rear end surface of the front bumper reinforcement 12.
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Abstract
Description
上記構成の自動車の前部構造10では、自動車が時速15キロメートルのオフセットリジッドバリア衝突(軽衝突)をすると、フロントバンパリインフォースメント12からの荷重によってクラッシュボックス16が軸圧縮変形し、図3に示される位置まで膨出部18が後退する。この場合、膨出部18がダイラタント衝撃吸収体24に衝突することはなく、クラッシュボックス16のみが軸圧縮変形し、衝突のエネルギを吸収する。これにより、フロントサイドメンバ14の損傷が防止されるので、車体前部の耐損傷性及び修理性が向上する。
Claims (5)
- 自動車のフロントサイドメンバの前端とフロントバンパリインフォースメントとの間に配設され、前記フロントサイドメンバよりも軸圧縮荷重に対する耐力が低く設定されたクラッシュボックスと、
ダイラタント特性を有する材料からなり、前記フロントサイドメンバの前端と前記フロントバンパリインフォースメントとの間に配設されると共に、両者のうちの一方との間に、自動車の前面衝突時における前記クラッシュボックスの軸圧縮変形を許容するための空間が設けられ、且つ、前記クラッシュボックスの軸圧縮変形量がその最大値よりも小さい設定値以上になると前記両者の間で圧縮荷重を受けるように車両前後方向の長さ寸法が設定されたダイラタント衝撃吸収体と、
を備えた自動車の前部構造。 - 前記クラッシュボックスは、前記フロントサイドメンバ側が開口した筒状に形成され、前記ダイラタント衝撃吸収体は、前記クラッシュボックス内に収容されて前記フロントサイドメンバの前端面に固定されている請求項1に記載の自動車の前部構造。
- 前記ダイラタント衝撃吸収体は、前記クラッシュボックスの周壁の断面形状と相似形に形成されて前記周壁と同軸上に配置されている請求項2に記載の自動車の前部構造。
- 前記クラッシュボックスの周壁と前記ダイラタント衝撃吸収体との間には、前記クラッシュボックスの軸圧縮変形時に前記周壁と前記ダイラタント衝撃吸収体とが干渉することを防止する隙間が形成されている請求項2又は請求項3に記載の自動車の前部構造。
- 前記クラッシュボックスは、前記フロントバンパリインフォースメント側に底壁が設けられた有底筒状に形成され、前記底壁には、前記ダイラタント衝撃吸収体側へ膨出した膨出部が設けられており、前記クラッシュボックスの軸圧縮変形量が前記設定値以上になると前記膨出部が前記ダイラタント衝撃吸収体に衝突するように構成されている請求項2~請求項4の何れか1項に記載の自動車の前部構造。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2011/051676 WO2012101810A1 (ja) | 2011-01-27 | 2011-01-27 | 自動車の前部構造 |
JP2012554591A JP5382239B2 (ja) | 2011-01-27 | 2011-01-27 | 自動車の前部構造 |
CN201180057772.3A CN103228488B (zh) | 2011-01-27 | 2011-01-27 | 汽车的前部结构 |
US13/989,193 US8814250B2 (en) | 2011-01-27 | 2011-01-27 | Automobile front portion structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2011/051676 WO2012101810A1 (ja) | 2011-01-27 | 2011-01-27 | 自動車の前部構造 |
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WO2012101810A1 true WO2012101810A1 (ja) | 2012-08-02 |
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PCT/JP2011/051676 WO2012101810A1 (ja) | 2011-01-27 | 2011-01-27 | 自動車の前部構造 |
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US (1) | US8814250B2 (ja) |
JP (1) | JP5382239B2 (ja) |
CN (1) | CN103228488B (ja) |
WO (1) | WO2012101810A1 (ja) |
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KR101836245B1 (ko) * | 2012-12-03 | 2018-03-08 | 현대자동차 주식회사 | 차량용 범퍼빔 유닛 |
WO2022181462A1 (ja) * | 2021-02-24 | 2022-09-01 | 株式会社ダイセル | 衝撃吸収装置 |
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JP5924308B2 (ja) * | 2013-06-03 | 2016-05-25 | トヨタ自動車株式会社 | 車体前部構造 |
JP5791676B2 (ja) * | 2013-09-10 | 2015-10-07 | 富士重工業株式会社 | 衝撃吸収装置 |
JP5834059B2 (ja) * | 2013-10-22 | 2015-12-16 | トヨタ自動車株式会社 | 燃料電池 |
DE102013019124A1 (de) * | 2013-11-15 | 2015-05-21 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Stoßfängerabstützung für ein Fahrzeug |
JP6020497B2 (ja) * | 2014-03-24 | 2016-11-02 | トヨタ自動車株式会社 | 車両のエネルギ吸収構造及びエネルギ吸収部材 |
CN104340148A (zh) * | 2014-10-27 | 2015-02-11 | 重庆市永宏陈记实业有限公司 | 具有主动防撞功能的分级减震式汽车保险杠装置 |
CN104354662A (zh) * | 2014-10-27 | 2015-02-18 | 重庆市永宏陈记实业有限公司 | 预伸出多级减震式汽车保险杠装置 |
CN104290703A (zh) * | 2014-10-27 | 2015-01-21 | 重庆市永宏陈记实业有限公司 | 具有主动防撞功能的多级减震式汽车保险杠装置 |
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Also Published As
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US20130300139A1 (en) | 2013-11-14 |
US8814250B2 (en) | 2014-08-26 |
CN103228488A (zh) | 2013-07-31 |
CN103228488B (zh) | 2015-04-29 |
JPWO2012101810A1 (ja) | 2014-06-30 |
JP5382239B2 (ja) | 2014-01-08 |
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