WO2011048694A1 - 車体構造 - Google Patents
車体構造 Download PDFInfo
- Publication number
- WO2011048694A1 WO2011048694A1 PCT/JP2009/068253 JP2009068253W WO2011048694A1 WO 2011048694 A1 WO2011048694 A1 WO 2011048694A1 JP 2009068253 W JP2009068253 W JP 2009068253W WO 2011048694 A1 WO2011048694 A1 WO 2011048694A1
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- WIPO (PCT)
- Prior art keywords
- side member
- deformation
- sub
- load
- vehicle body
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
- B62D21/152—Front or rear frames
Definitions
- the present invention relates to a vehicle body structure in a vehicle.
- a structure including a side member extending in the vehicle front-rear direction and a sub-side member provided in parallel with the side member is known (for example, Patent Document 1).
- the sub-side member has a front region, a central region, and a rear region. Further, the buckling strength of the rear region of the sub side member is set higher than that of the front region, and the buckling strength of the central region of the sub side member is set higher than that of the rear region.
- the deformation of the side member and the deformation of the sub-side member are synchronized when a load is applied. This further improves the load absorption efficiency. Further, the load can be distributed to the side member and the sub-side member. Thus, it has been required to further improve the collision performance by making the vehicle body structure suitable.
- the present invention has been made to solve such a problem, and an object thereof is to provide a vehicle body structure capable of improving the collision performance.
- a vehicle body structure according to the present invention is surrounded by a pair of side members extending in the vehicle front-rear direction, a pair of sub-side members arranged in parallel below the pair of side members, a pair of side members, and a pair of sub-side members.
- the sub-side member has a portion whose strength is lower than that of the other portion at a position in front of the power unit with respect to the load.
- the sub-side member having a constant strength along the vehicle longitudinal direction is bent and deformed at the center position.
- the sub-side member has a portion whose strength is lower than that of the other portion at a position in front of the power unit with respect to the load.
- the sub-side member is easily deformed at a portion where the strength on the front side is lowered. That is, the sub-side member is likely to be deformed at a position ahead of the power unit EG with respect to the load when a load is applied.
- the sub-side member can be deformed in synchronism with the deformation of the side member in a region in front of the power unit EG having a relatively small number of rigidly arranged components. Therefore, the sub side member can absorb the load efficiently in cooperation with the side member.
- the sub-side member is configured to have higher strength in the rear part with respect to the load than in the front part of the power unit. Therefore, after the load is absorbed in cooperation between the front side of the side member and the front side of the sub-side member, the sub-side member can sufficiently transmit the load to the rear skeleton structure. As a result, the load can be distributed to the side member and the sub-side member. Thus, the collision performance can be improved.
- the side member has a deformation promoting portion that promotes deformation of the side member at a position ahead of the power unit with respect to the load. Similar to the sub-side member, the side member is easily deformed in a region ahead of the power unit with respect to the load. Therefore, it becomes easier to synchronize the deformation of the side member and the deformation of the sub-side member. Thereby, the collision performance is further improved.
- the sub-side member bends and deforms at a position in front of the power unit with respect to the load when a load is applied. It becomes easy to synchronize the deformation of the side member and the deformation of the sub-side member. Thereby, the collision performance is further improved.
- a vehicle body structure includes a pair of side members extending in the vehicle front-rear direction and a pair of sub-side members arranged in parallel below the pair of side members, and the side members are deformed to promote deformation.
- the promotion part is provided on the front side with respect to the load, and the sub-side member has a deformation cooperating part that deforms in accordance with the deformation of the deformation promotion part.
- the side member since the side member has the deformation promoting portion on the front side with respect to the load, the load can be transmitted to the rear side after absorbing the load on the front side. Further, since the deformation cooperative portion of the sub side member is deformed along with the deformation of the deformation promoting portion, the deformation of the deformation promoting portion of the side member and the deformation of the deformation cooperative portion of the sub side member are easily synchronized. Therefore, the sub side member can absorb the load efficiently in cooperation with the side member. Further, the load can be distributed to the side member and the sub-side member. Thus, the collision performance can be improved.
- the strength of the sub-side member at the deformation cooperative portion is lower than that of the rear side of the deformation cooperative portion with respect to the load.
- the sub-side member bends and deforms at the deformation cooperating portion when a load is applied. Therefore, the deformation of the side member and the deformation of the sub-side member can be easily synchronized. Thereby, the collision performance is further improved.
- the deformation promoting portion and the deformation cooperating portion are arranged at the same position in the vehicle front-rear direction.
- the deformation of the deformation promoting portion and the deformation of the deformation cooperative portion can be more reliably synchronized. Thereby, the collision performance is further improved.
- the collision performance can be improved.
- FIG. 1 is a schematic configuration side view of a vehicle body structure according to an embodiment of the present invention as viewed from the vehicle width direction.
- FIG. 2 is a perspective view showing a configuration of a sub-side member of the vehicle body structure according to the embodiment of the present invention.
- FIG. 3 is a schematic configuration diagram of the vehicle body structure according to the embodiment of the present invention, and is a diagram illustrating a state when a load is applied to the radiator support.
- FIG. 4 is a schematic configuration diagram of a conventional vehicle body structure, and shows a state when a load is applied to a radiator support.
- FIG. 5 is a perspective view showing a sub-side member of a vehicle body structure according to a modification.
- FIG. 1 is a schematic configuration side view of a vehicle body structure according to an embodiment of the present invention as viewed from the vehicle width direction.
- FIG. 2 is a perspective view showing a configuration of a sub-side member of the vehicle body structure according to the embodiment of the present invention.
- FIG. 3
- FIG. 6 is a perspective view showing a sub-side member of a vehicle body structure according to a modification.
- FIG. 7 is a perspective view showing a sub-side member of a vehicle body structure according to a modification.
- FIG. 8 is a perspective view showing a sub-side member of a vehicle body structure according to a modification.
- FIG. 9 is a perspective view showing a sub-side member of a vehicle body structure according to a modification.
- FIG. 10 is a perspective view showing a sub-side member of a vehicle body structure according to a modification.
- FIG. 1 is a schematic side view of a vehicle body structure 1 according to an embodiment of the present invention as viewed from the vehicle width direction.
- the vehicle body structure 1 is a skeleton structure on the front side of the vehicle.
- the vehicle body structure 1 has a function of absorbing a load when a load is applied in the longitudinal direction of the vehicle.
- the vehicle body structure 1 mainly includes a front side member 2, a sub side member 3, a radiator support 4, a suspension member 6, and a power unit EG.
- the front side member 2 is a pair of skeleton members extending in the vehicle front-rear direction.
- the front side members 2 are respectively arranged on both sides in the vehicle width direction.
- the front side member 2 has a function of absorbing the load when a load acts on the front side of the vehicle.
- the front side member 2 has a kick portion 2a that is inclined upward toward the front of the vehicle.
- the front side member 2 has a front portion 2b extending in the vehicle front-rear direction on the front side of the kick portion 2a.
- the front side member 2 has a rear portion 2c extending in the vehicle front-rear direction on the rear side of the kick portion 2a.
- the front part 2b is arranged at a position higher than the rear part 2c.
- the radiator support 4 is disposed in front of the front side member 2 and the sub side member 3.
- the radiator support 4 is a member that supports a radiator (not shown).
- the radiator support 4 has a function of receiving a load acting on the front side of the vehicle.
- the radiator support 4 includes a radiator support upper, a radiator support lower, and a pair of radiator support sides 4a.
- the radiator support upper extends in the vehicle width direction on the upper side.
- the radiator support lower extends in the vehicle width direction on the lower side.
- the radiator support side 4a extends in the vertical direction on both sides in the vehicle width direction.
- the radiator support side 4a is connected to the radiator support upper and the radiator support lower.
- the pair of radiator support sides 4a are connected to the front ends of the front portions 2b of the pair of front side members 2, respectively.
- the suspension member 6 is a member to which a front suspension or the like is assembled.
- the suspension member 6 is disposed below the front side member 2.
- the suspension member 6 is disposed below the kick portion 2 a of the front side member 2.
- the sub-side member 3 is a skeleton member arranged in parallel with the front side member 2 below the front side member 2.
- the sub-side member 3 extends in the vehicle front-rear direction so as to be parallel to the front portion 2 b of the front side member 2.
- the sub-side member 3 has a function of absorbing the load when a load acts on the front side of the vehicle.
- the front end 3 a of the sub-side member 3 is connected to the radiator support lower of the radiator support 4. Further, the rear end portion 3 b of the sub side member 3 is connected to the suspension member 6.
- the detailed configuration of the subside member 3 will be described later.
- the power unit EG is composed of an engine or the like.
- the power unit EG is disposed in a region surrounded by the front side member 2, the sub side member 3, the radiator support 4, and the suspension member 6.
- the power unit EG is disposed at a position spaced apart from the radiator support 4 by a predetermined distance.
- FIG. 2 is a perspective view showing a configuration of the sub-side member 3 of the vehicle body structure 1 according to the present embodiment.
- the front side member 2 has a deformation promoting portion 10 that promotes deformation of the front side member 2 at a position ahead of the power unit EG.
- the vehicle body structure 1 has a reference position BL that divides a region in front of the vehicle to be deformed and a region in the rear of the vehicle in which the deformation is suppressed.
- the reference position BL is set at a position in front of the front end of the power unit EG.
- the deformation promoting unit 10 is set in front of the reference position BL.
- the deformation promoting portion 10 is constituted by a plurality of beads 11 formed on the side wall of the front side member 2.
- the bead 11 is formed by recessing the side wall of the front side member 2 inward or outward.
- the bead 11 extends in the vehicle vertical direction. Each bead 11 is arranged at a predetermined interval in the vehicle longitudinal direction.
- the front side member 2 is promoted to be deformed by the deformation promoting portion 10 on the front side of the reference position BL when a load is applied. Thereafter, the front side member 2 transmits the load rearward while suppressing deformation at the rear side of the reference position BL.
- the sub-side member 3 has a deformation cooperating portion (a portion whose strength is lowered) 7 at a position in front of the power unit EG, and the deformation is suppressed to the rear side of the deformation cooperating portion 7.
- Part (rear part) 8 The deformation cooperating unit 7 has a lower strength than the deformation suppressing unit 8 which is another part.
- the deformation cooperative portion 7 has a function of being deformed along with the deformation of the deformation promoting portion 10 of the front side member 2 when a load is applied. That is, the deformation cooperating portion 7 is configured to be easily deformed without impeding the deformation of the deformation promoting portion 10 of the front side member 2 when a load is applied.
- the deformation suppression unit 8 has a function of suppressing deformation when a load is applied.
- the deformation cooperating portion 7 of the sub side member 3 is configured to have a low strength
- the deformation suppressing portion 8 of the sub side member 3 is configured to have a high strength
- the deformation cooperative portion 7 of the sub-side member 3 has an upper wall 7a, a side wall 7b, and a side wall 7c
- the deformation suppressing portion 8 of the sub-side member 3 has an upper wall 8a, a side wall 8b, and a side wall 8c.
- the upper wall 7a and the upper wall 8a are configured by a single rectangular plate extending in the vehicle front-rear direction.
- the side wall 7b and the side wall 8b extend in the vehicle front-rear direction.
- the side wall 7b extends vertically downward from the side edge of the upper wall 7a, and the side wall 8b extends vertically downward from the side edge of the upper wall 8a.
- the width of the side wall 7b in the vehicle vertical direction is narrower than the width of the side wall 8b in the vehicle vertical direction.
- the lower end portion is inclined toward the vehicle front-rear direction.
- the side wall 7c and the side wall 8c extend in the vehicle front-rear direction.
- the side wall 7c extends vertically downward from the other side end of the upper wall 7a, and the side wall 8c extends vertically downward from the other side end of the upper wall 8a.
- the width of the side wall 7c in the vertical direction of the vehicle is narrower than the width of the side wall 8c in the vertical direction of the vehicle.
- the lower end portion is inclined toward the vehicle front-rear direction.
- the shapes of the side wall 7b and the side wall 8b, and the side wall 7c and the side wall 8c coincide with each other when viewed from the vehicle width direction.
- the deformation promoting portion 10 of the front side member 2 and the deformation cooperative portion 7 of the sub side member 3 are arranged at least in front of the power unit.
- the deformation promoting portion 10 of the front side member 2 and the deformation cooperative portion 7 of the sub side member 3 are both formed in front of the reference position BL.
- transformation cooperation part 7 of the sub side member 3 are arrange
- the position does not need to be exactly the same. It is only necessary that the deformation cooperative unit 7 can be deformed according to the deformation of the deformation promoting unit 10. Therefore, the rear end position of the deformation promoting unit 10 and the rear end position of the deformation cooperative unit 7 may be shifted.
- FIG. 3 is a schematic configuration diagram of the vehicle body structure 1 according to the present embodiment, and shows a state when a load is applied to the radiator support 4.
- FIG. 4 is a schematic configuration diagram of a conventional vehicle body structure 100, and shows a state when a load is applied to the radiator support 4.
- the conventional vehicle body structure 100 includes a sub-side member 103 having a constant cross-sectional area as shown in FIG.
- the strength of the sub-side member 103 is constant at any position in the vehicle front-rear direction. Further, a deformation suppressing portion is not provided on the front side of the front side member 2.
- the sub-side member 103 has a constant strength, so that it is bent at the center position. Therefore, the amount of deformation of the radiator support 4 on the lower side of the vehicle body increases. Further, the front side member 2 and the sub side member 3 are greatly different in deformation position and deformation speed, and the deformation mode is not stable. Further, when the sub-side member 103 is folded at the center position, load transmission on the lower side of the vehicle body is greatly reduced. Therefore, the load may be concentrated on the front side member 2.
- the sub-side member 3 is stronger than the rear side deformation suppressing portion 8 at a position ahead of the power unit EG. It has a lowered portion, that is, a deformation cooperating portion 7.
- the sub-side member 103 having a constant strength along the vehicle front-rear direction is bent and deformed at the center position.
- the sub-side member 3 according to the present embodiment is easily deformed by the deformation cooperating portion 7 whose front side strength is lowered. That is, as shown in FIG. 3, the sub-side member 3 is likely to be deformed at a position ahead of the power unit EG when a load is applied.
- the sub-side member 3 can be deformed in synchronism with the deformation of the front side member 2 in a region in front of the power unit EG having a relatively small number of rigidly arranged components. Therefore, the sub-side member 3 can absorb the load efficiently in cooperation with the front side member 2. Further, the sub-side member 3 is configured to have higher strength than the deformation cooperative portion 7 on the rear side of the deformation cooperative portion 7. Therefore, after the front side member 2 and the front side of the sub-side member 3 cooperate to absorb the load, the sub-side member 3 can sufficiently transmit the load to the rear skeleton structure. Thereby, the load can be distributed to the front side member 2 and the sub side member 3. Thus, the collision performance can be improved.
- the front side member 2 has a deformation promoting portion 10 that promotes deformation of the front side member 2 at a position ahead of the power unit EG.
- the front side member 2 is easily deformed in a region in front of the power unit EG. Therefore, the deformation of the front side member 2 and the deformation of the sub side member 3 are more easily synchronized. Thereby, the collision performance is further improved.
- the sub-side member 3 is configured to bend and deform at a position ahead of the power unit EG when a load is applied. Therefore, the deformation of the front side member 2 and the deformation of the sub side member 3 are easily synchronized. Thereby, the collision performance is further improved.
- the front side member 2 has a deformation promoting portion 10 that promotes deformation on the front side.
- the sub-side member 3 has a deformation cooperating portion 7 that is deformed as the deformation promoting portion 10 is deformed. Since the front side member 2 has the deformation promoting portion 10 on the front side, the load can be transmitted rearward after absorbing the load on the front side. Further, since the deformation cooperative portion 7 of the sub side member 3 is deformed along with the deformation of the deformation promoting portion 10, the deformation of the deformation promoting portion 10 of the front side member 2 and the deformation cooperative portion 7 of the sub side member 3 are changed. The deformation becomes easy to synchronize. Therefore, the sub-side member 3 can absorb the load efficiently in cooperation with the front side member 2. Further, the load can be distributed to the front side member 2 and the sub side member 3. Thus, the collision performance can be improved.
- the sub-side member 3 has a lower strength at the deformation cooperation portion 7 than the deformation suppression portion 8 that is a rear portion of the vehicle relative to the deformation cooperation portion 7.
- the deformation cooperation portion 7 has been reduced.
- the deformation cooperative portion 7 can be reliably deformed in synchronization with the deformation promoting portion 10 of the front side member 2.
- the portion stronger than the deformation cooperative portion 7 can transmit the load backward. Therefore, the load can be distributed to the front side member 2 and the sub side member 3.
- the sub-side member 3 is bent and deformed by the deformation cooperation portion 7 when a load is applied. Therefore, the deformation of the front side member 2 and the deformation of the sub side member 3 are easily synchronized. Thereby, the collision performance is further improved.
- the deformation promoting unit 10 and the deformation cooperating unit 7 are arranged at the same position in the vehicle front-rear direction. Therefore, the deformation of the deformation promoting unit 10 and the deformation of the deformation cooperative unit 7 can be more reliably synchronized. Thereby, the collision performance is further improved.
- the present invention is not limited to the above-described embodiment.
- the shape of the sub-side member is not particularly limited as long as the front side is easily deformed.
- the sub-side member shown in FIGS. 5 to 10 may be used.
- the sub-side member 20 shown in FIG. 5 has a deformation cooperating portion 21 on the front side of the vehicle and a deformation suppressing portion 22 on the rear side.
- the sub side member 20 has a configuration in which the sub side member 3 is turned upside down. That is, the side walls 21b and 21c of the deformation cooperating part 21 and the side walls 21c and 22c of the deformation suppressing part 22 extend upward.
- the sub-side member 30 shown in FIG. 6 has a deformation cooperating portion 31 on the front side of the vehicle and a deformation suppressing portion 32 on the rear side.
- the upper wall 31a and the side walls 31b and 31c of the deformation cooperative part 31 and the upper wall 32a and the side walls 32b and 32c of the deformation suppressing part 32 have a certain width.
- the plate thickness of the deformation cooperating unit 31 is thinner than the plate thickness of the deformation suppressing unit 32.
- the deformation cooperation part 41 has a bead 43 between the upper wall 41a and the side wall 41b and between the upper wall 41a and the side wall 41c.
- the deformation suppression unit 42 does not have a bead. Since the deformation cooperation part 41 has the bead 43, it becomes easy to deform
- FIG. 8 has a deformation cooperating portion 51 on the front side of the vehicle and a deformation suppressing portion 52 on the rear side.
- a through hole 53 is formed in the upper wall 51a of the deformation cooperative portion 51.
- the through hole 53 shown in FIG. 8 is a long hole extending in the longitudinal direction of the sub-side member 50, the shape is not limited. For example, a long hole extending in the short direction of the sub-side member 50 may be used.
- the side member 60 is configured by providing a reinforcing member 63 on the sub-side member 3 according to the above-described embodiment.
- the reinforcing member 63 is disposed between the deformation cooperation unit 61 and the deformation suppression unit 62.
- the reinforcing member 63 extends upward and is connected to the front side member 2.
- the deformation 10 has a deformation cooperating portion 71 on the front side of the vehicle and a deformation suppressing portion 72 on the rear side.
- the deformation suppressing unit 72 is configured by a reinforcing member that is bent in an L shape.
- the reinforcing member extends to the front of the vehicle and bends and extends upward while maintaining a certain cross-sectional shape.
- the upper end of the reinforcing member is connected to the front side member 2.
- the deformation cooperating unit 71 is configured by a member that is connected to the deformation suppressing unit 72 by a bent portion.
- the vehicle body structure on the front side of the vehicle body has been described.
- the vehicle body structure according to the present invention may be applied to either the front side or the rear side of the vehicle body.
- the “front side with respect to the load” indicates the rear end side of the vehicle body.
- the present invention can be used when absorbing a load acting on a vehicle.
- SYMBOLS 1 Car body structure, 2 ... Front side member (side member), 3 ... Sub side member, 7 ... Deformation cooperation part (part by which intensity
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Abstract
Description
Claims (7)
- 車両前後方向に延びる一対のサイドメンバと、
一対の前記サイドメンバの下方にそれぞれ並設された一対のサブサイドメンバと、
一対の前記サイドメンバ及び一対の前記サブサイドメンバに囲まれる位置に配置されるパワーユニットと、を備え、
前記サブサイドメンバは、荷重に対して前記パワーユニットよりも前側の位置に、当該位置よりも後側の部分に比して強度が低くされた部分を有することを特徴とする車体構造。 - 前記サイドメンバは、荷重に対して前記パワーユニットよりも前側の位置に、前記サイドメンバの変形を促進する変形促進部を有することを特徴とする請求項1記載の車体構造。
- 前記サブサイドメンバは、荷重が作用したときに、荷重に対して前記パワーユニットよりも前側の位置で、折れ変形することを特徴とする請求項1又は2記載の車体構造。
- 車両前後方向に延びる一対のサイドメンバと、
一対の前記サイドメンバの下方にそれぞれ並設された一対のサブサイドメンバと、を備え、
前記サイドメンバは、変形を促進する変形促進部を荷重に対する前端側に有し、
前記サブサイドメンバは、前記変形促進部の変形に伴って変形する変形協働部を有することを特徴とする車体構造。 - 前記サブサイドメンバは、前記変形協働部よりも荷重に対して後側の部分に比して、前記変形協働部での強度が低くされていることを特徴とする請求項4記載の車体構造。
- 前記サブサイドメンバは、荷重が作用したときに、前記変形協働部で、折れ変形することを特徴とする請求項4又は5記載の車体構造。
- 前記変形促進部と前記変形協働部は、車両前後方向において、同位置に配置されていることを特徴とする請求項4~6のいずれか一項記載の車体構造。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2011513173A JP5218649B2 (ja) | 2009-10-23 | 2009-10-23 | 車体構造 |
CN200980148564.7A CN102985313B (zh) | 2009-10-23 | 2009-10-23 | 车身结构 |
PCT/JP2009/068253 WO2011048694A1 (ja) | 2009-10-23 | 2009-10-23 | 車体構造 |
DE112009005339.4T DE112009005339B4 (de) | 2009-10-23 | 2009-10-23 | Fahrzeugkarosseriestruktur |
US13/141,356 US8523273B2 (en) | 2009-10-23 | 2009-10-23 | Vehicle body structure |
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PCT/JP2009/068253 WO2011048694A1 (ja) | 2009-10-23 | 2009-10-23 | 車体構造 |
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PCT/JP2009/068253 WO2011048694A1 (ja) | 2009-10-23 | 2009-10-23 | 車体構造 |
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US (1) | US8523273B2 (ja) |
JP (1) | JP5218649B2 (ja) |
CN (1) | CN102985313B (ja) |
DE (1) | DE112009005339B4 (ja) |
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JP2020158083A (ja) * | 2019-03-28 | 2020-10-01 | ダイハツ工業株式会社 | 車両前部構造 |
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JP5975045B2 (ja) * | 2014-01-14 | 2016-08-23 | トヨタ自動車株式会社 | 車両下部構造 |
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2009
- 2009-10-23 DE DE112009005339.4T patent/DE112009005339B4/de not_active Expired - Fee Related
- 2009-10-23 CN CN200980148564.7A patent/CN102985313B/zh not_active Expired - Fee Related
- 2009-10-23 WO PCT/JP2009/068253 patent/WO2011048694A1/ja active Application Filing
- 2009-10-23 JP JP2011513173A patent/JP5218649B2/ja not_active Expired - Fee Related
- 2009-10-23 US US13/141,356 patent/US8523273B2/en not_active Expired - Fee Related
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JP2020158083A (ja) * | 2019-03-28 | 2020-10-01 | ダイハツ工業株式会社 | 車両前部構造 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2011048694A1 (ja) | 2013-03-07 |
US20110254313A1 (en) | 2011-10-20 |
CN102985313B (zh) | 2014-05-21 |
US8523273B2 (en) | 2013-09-03 |
CN102985313A (zh) | 2013-03-20 |
JP5218649B2 (ja) | 2013-06-26 |
DE112009005339B4 (de) | 2015-04-02 |
DE112009005339T5 (de) | 2012-09-06 |
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