CN101844550A - Automobile bumper with two energy-absorbing modes - Google Patents
Automobile bumper with two energy-absorbing modes Download PDFInfo
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- CN101844550A CN101844550A CN 201010173437 CN201010173437A CN101844550A CN 101844550 A CN101844550 A CN 101844550A CN 201010173437 CN201010173437 CN 201010173437 CN 201010173437 A CN201010173437 A CN 201010173437A CN 101844550 A CN101844550 A CN 101844550A
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Abstract
The invention relates to an automobile bumper with two energy-absorbing modes, which belongs to the technical field of automobile crash safety and is characterized by comprising a bumper coating, a bumper impact beam and an upper energy-absorbing block, an upper-layer hard structure, a lower-layer hard structure and a lower energy-absorbing block which are clamped between the bumper coating and the bumper impact beam and sequentially arranged from top to bottom, wherein the two hard structures are arc-shaped metal rods, and the upper-layer hard structure and the lower-layer hard structure are mutually overlapped and placed. The automobile bumper has small stiffness under the working condition I (such as the pedestrian protection working condition) and larger stiffness under the working condition II (such as the low-speed crash working condition), and can simultaneously meet the low-speed crash regulations and the design requirements of the pedestrian protection regulations.
Description
Technical field
The present invention relates to a kind of energy absorption device of Federal bumper, belong to the automotive crash safety technical field, can satisfy under the syn-collision operating mode not different requirements simultaneously, as the requirement of pedestrian protecting and low speed collision protection to Federal bumper rigidity.
Background technology
The automotive front end bumper/spoiler is the vitals that influences the vehicle safety index.Existing automotive safety laws and regulations requirement, when tested automobile and the obstacle that equates with sole mass when colliding than low velocity, the endergonic structure of Federal bumper can absorb most of collision energy, thereby reduces the automobile extent of damage.Simultaneously; pedestrian impact protection design also comes into one's own in the exploitation of China's automobile product day by day; when laws and regulations requirement Federal bumper system and pedestrian lower leg bump; crash acceleration can not be too high, and this just requires the endergonic structure of Federal bumper to impact pedestrian lower leg suitable buffering is provided.
General bumper (seeing invention EP1300293A9) as shown in Figure 2, comprises bumper beam 4, endergonic structure 23, bumper cover 1.Most widely used endergonic structure is a foam in the existing Federal bumper.Automobile bumper structure arrangement requirement compactness is so the arrangement space of endergonic structure is limited.
Studies show that in limited placement of foam space, the Federal bumper foam stiffness that satisfies the low speed collision requirement is bigger, this bumper and pedestrian lower leg collision cause pedestrian lower leg seriously injured easily; Same, satisfy the foam that the pedestrian lower leg protection requires, because rigidity is less, often can not satisfy the requirement of low speed collision.
In order to satisfy the requirement of two kinds of collision safety rules, a kind of method of compromise is by geometry and material parameter optimization to foam, designs a kind of foam texture, makes pedestrian impact damage result and low speed collision result all can accept.But response and the response in low speed collision test of design-calculated bumper/spoiler in pedestrian protection test can be not very good in this way.
In addition, also there is new design to pass through the method for two sections rigidity (invention CN101306671) and satisfies pedestrian protecting requirement and low speed collision protection requirement simultaneously.Two sections springs are install in series before and after automotive front end, and the less spring arrangement of rigidity is preceding, the bigger spring arrangement of rigidity after.When automobile and pedestrian bump, the less deflection of spring of rigidity in the bumper/spoiler; When automobile and obstacle when colliding than low velocity, two sections springs are out of shape jointly, absorb more energy.This design has influenced the layout compactedness of automobile in actual applications owing to taken the geometric space of automotive front end.
Therefore, a kind of Federal bumper endergonic structure with two kinds of energy-absorbing modes can solve not the syn-collision operating mode to the different requirements of bumper/spoiler rigidity.
Summary of the invention
Because protection designing requirement of automobile low speed collision and pedestrian protecting designing requirement are runed counter to, existing vehicle bumper energy absorption structure can not satisfy the requirement that two kinds of collision rules detect simultaneously.In addition, because automotive front end structure design space is limited, so limitation is arranged by the satisfied simultaneously two kinds of methods of colliding rules of the endergonic structure of composite design rigidity.
The invention is characterized in; it is a kind of Federal bumper that can satisfy pedestrian protecting and low speed collision protection requirement simultaneously; contain: Abdeckung Stossfaenger 1, last energy absorbent block 21 and following energy absorbent block 22, upper strata rigid structure 31 and lower floor's rigid structure 32 and bumper/spoiler collision prevention girders 4, wherein:
Last energy absorbent block 21 and following energy absorbent block 22 all are foam-plastic blocks, and cross sectional shape is to comprise rectangle, trapezoidal at interior polygon,
Upper strata rigid structure 31 and lower floor's rigid structure 32, it is shaft-like all to be semi arch, be that a kind of steel or aluminium of comprising is in interior Metallic rod, cross sectional shape is to comprise rectangle, trapezoidal at interior polygon, described upper strata rigid structure 31 and lower floor's rigid structure 32 upper and lower being arranged in across between described upward energy absorbent block 21 and the following energy absorbent block 22
Bumper/spoiler collision prevention girders 4, pressed from both sides between described bumper/spoiler collision prevention girders 4 and the described Abdeckung Stossfaenger 1 described up and down successively configuration on energy absorbent block 21, upper strata rigid structure 31 and lower floor's rigid structure 32 and following energy absorbent block 22.
The present invention proposes a kind of new bumper energy absorption structure with two kinds of energy-absorbing modes; bumper energy absorption structure rigidity is less under the pedestrian protecting operating mode; and endergonic structure rigidity can be very big under the low speed collision operating mode, thereby can satisfy the designing requirement of low speed collision rules and pedestrian protecting rules simultaneously.This endergonic structure has carried out decoupling zero with the multiple goal rigidity Design problem of bumper/spoiler, provides more excellent Design Countermeasure for enterprise carries out the bumper/spoiler design at different collision safety laws and regulations requirements.
Description of drawings
The Z of Fig. 1---novel bumper energy absorption structure is to view;
Fig. 2---certain traditional insurance bumper structure scheme drawing (being derived from invention EP1300293A9);
The A-A cross-sectional view of Fig. 3---novel bumper energy absorption structure;
Semi arch rod shaped structure scheme drawing in Fig. 4---upper strata rigid structure 31 and the lower floor's rigid structure 32;
Fig. 5---the Z of bumper/spoiler low speed collision operating condition of test is to view;
Fig. 6---the Y of bumper/spoiler low speed collision operating condition of test is to section-drawing;
Fig. 7---the Z before the test of bumper/spoiler low speed collision is to view;
Fig. 8---the Z after the test of bumper/spoiler low speed collision is to view;
Z before Fig. 9---bumper/spoiler and the pedestrian lower leg Collision test is to view;
Z after Figure 10---bumper/spoiler and the pedestrian lower leg Collision test is to view;
The stiffness curve of endergonic structure in Figure 11---R42 low speed collision and the GTR pedestrian's leg collision operating mode.
Sign in the accompanying drawing is described as follows,
The 1-Abdeckung Stossfaenger, the last energy absorbent block of 21-, energy absorbent block under the 22-, 23-traditional insurance thick stick foam endergonic structure, 31-upper strata rigid structure, 32-lower floor rigid structure, 4-bumper/spoiler collision prevention girders, 5-low speed collision piece, 6-pedestrian's leg module position one, 7-pedestrian's leg module position two, the secondary bumper/spoiler stringer board of 81-, 82 secondary Abdeckung Stossfaengers, 83-water tank cross sill, the secondary bumper/spoiler transverse slat of 84-, the arc radius of R-semi arch structure, W1-semi arch structural openings width, the overlapping width of the adjacent semi arch structure of W2-.
The specific embodiment
The objective of the invention is to propose a kind of new automobile bumper energy absorption structure, can satisfy the different requirements of multiple collision operating mode to endergonic structure rigidity simultaneously, is example with pedestrian protecting rules and low speed collision rules below, introduces embodiments of the present invention.
As shown in Figure 1, automobile bumper structure of the present invention has comprised Abdeckung Stossfaenger 1, last energy absorbent block 21 (see figure 3)s, upper strata rigid structure 31, lower floor's rigid structure 32, following energy absorbent block 22, bumper/spoiler collision prevention girders 4.Wherein Abdeckung Stossfaenger 1 is the cover panel of endergonic structure, and bumper/spoiler collision prevention girders 4 links to each other with two front side members (not signal in the drawings) of rear end.Endergonic structure between 1 and 4 is a core texture of the present invention.Clip upper strata rigid structure 31 and lower floor's rigid structure 32 between last energy absorbent block 21 and the following energy absorbent block 22, form sandwich construction on the short transverse.
As shown in Figure 3; upper and lower energy absorbent block 21 and 22 rigidity are less; can make by materials such as foam, honeycomb aluminium; it can effectively absorb collision energy in pedestrian's leg protection; material that can be by changing energy absorbent block in design, sectional dimension etc. are adjusted its rigidity, also can use endergonic structure in other invention to constitute respectively and go up energy absorbent block 21 and following energy absorbent block 22.
Upper strata rigid structure 31 and lower floor's rigid structure 32 are made up of the semi arch rod shaped structure (as shown in Figure 4) of some respectively, and they are not connected with bumper beam, only are fixed in the whole bumper by gripping power by upper and lower energy absorbent block.The overlapping width W 2 of upper strata rigid structure 31 and lower floor's rigid structure 32 equals 66mm.This structure can be made by hard metals such as steel, aluminium or non-metallic material, and arc radius R equals the radius 66mm of pedestrian's leg module in the rules, and circular arc A/F W1 equals 132mm.Overlapping width W 2 between cross sectional shape by design bar structure and size, semi arch radius R, semi arch angle, the semi arch can be adjusted its compression stiffness in low speed collision.
If this endergonic structure and pedestrian lower leg collision, because the external diameter of pedestrian's lower limb module less than the internal diameter of semi arch rod shaped structure in rigid structure 31 and 32, so the semi arch rod shaped structure moulding distortion can not take place, has only upper and lower energy absorbent block distortion energy-absorbing; Even pedestrian lower leg contacts earlier with the edge of semi arch structure, the semi arch rod shaped structure also can be rolled along the front surface of collision prevention girders 4, can not apply extra impact force to shank.
If this endergonic structure bumper/spoiler carries out low speed collision statutes test (as Fig. 5 and Fig. 6), Impactor 7 has bigger overlapping region with bumper energy absorption structure, at least 2 semi arch rod shaped structure integral body can be compressed, the rigidity of whole endergonic structure equals semi arch rod shaped structure and upper and lower energy absorbent block rigidity of structure sum, higher rigidity can fully absorb the low speed collision energy, prevents the structural failure of bumper/spoiler collision prevention girders back.
This invention is a kind of bumper energy absorption structure that can satisfy pedestrian protecting rules and low speed collision rules simultaneously.Below the effect of this bumper energy absorption structure will be described at these two kinds of statutes tests respectively.
In the ECE R42 bumper/spoiler low speed collision statutes test of Europe, an Impactor identical with car mass 5 collides with speed and the Federal bumper of 4km/h, requires the structures such as radiator, steering swivel system, suspension of bumper/spoiler collision prevention girders 4 back not damage.The present invention is applied in modeling analysis in certain Federal bumper system, endergonic structure distortion front and back are as Fig. 7 and Fig. 8, " force-displacement curve " of endergonic structure as shown in figure 11, because under the R42 low speed collision operating mode, last energy absorbent block 21, energy absorbent block 22, upper strata rigid structure 31 and 32 combineds action of lower floor's rigid structure down, the impact force peak value reaches 19.8kN.
It heavily be the lower limb module of 13.4kg that pedestrian lower leg protection statutes test (GTR pedestrian's leg Collision test) requires, when colliding with the speed of 11.1m/s and Federal bumper; require the shin bone acceleration peak value of shank module to be no more than 170g; the knee joint bending angle is no more than 19 degree, and the knee joint shear displacemant is no more than 6mm.The present invention is applied in modeling analysis in certain Federal bumper system, when the middle position of pedestrian lower leg and semi arch rod shaped structure bumps against (lower limb module 6 in as Fig. 9), has only last energy absorbent block 21 and following energy absorbent block 22 energy-absorbings; When the boundary position of pedestrian lower leg and semi arch rod shaped structure bumps against (lower limb module 7 in as Fig. 9), upper strata rigid structure 31 and the 32 1 end perks of lower floor's rigid structure, the resistance that shank is produced is very little, and reality still has only last energy absorbent block 21 and following energy absorbent block 22 energy-absorbings in this case.Before and after 32 distortion of upper strata rigid structure 31 and lower floor's rigid structure as Fig. 9 and Figure 10, endergonic structure " force-displacement curve " as shown in figure 11, the about 7.5kN of impact force peak value is lower than the impact force peak value of R42 low speed collision operating mode.
Claims (5)
1. the Federal bumper that has two kinds of energy-absorbing modes, it is characterized in that, be a kind ofly can satisfy the not Federal bumper of syn-collision operating mode simultaneously, contain: Abdeckung Stossfaenger (1), last energy absorbent block (21) and following energy absorbent block (22), upper strata rigid structure (31) and lower floor's rigid structure (32) and bumper/spoiler collision prevention girders (4), wherein:
Last energy absorbent block (21) and following energy absorbent block (22) all are foam-plastic blocks, and cross sectional shape is to comprise rectangle or trapezoidal at interior polygon,
Upper strata rigid structure (31) and lower floor's rigid structure (32), it is shaft-like all to be semi arch, be that a kind of steel or aluminium of comprising is in interior Metallic rod, cross sectional shape is to comprise rectangle or trapezoidal at interior polygon, described upper strata rigid structure (31) and lower floor's rigid structure (32) are upper and lower to be arranged between described upward energy absorbent block (21) and the following energy absorbent block (22) across
Bumper/spoiler collision prevention girders (4), described upper and lower last energy absorbent block (21), upper strata rigid structure (31), lower floor's rigid structure (32) and the following energy absorbent block (22) of configuration successively of between described bumper/spoiler collision prevention girders (4) and described Abdeckung Stossfaenger (1), being pressed from both sides.
2. the Federal bumper with two kinds of energy-absorbing modes according to claim 1, it is characterized in that, the arc radius (R) of described upper strata rigid structure (31) or lower floor's rigid structure (32) is at least 66mm, A/F (W1) is at least 132mm, and the overlapping width (W2) of this upper strata rigid structure (31) and lower floor's rigid structure (32) mostly is 66mm most.
3. the Federal bumper with two kinds of energy-absorbing modes according to claim 1 is characterized in that, the described material of going up energy absorbent block (21) or following energy absorbent block (22) replaces with plastics grid or thin-walled tube.
4. the Federal bumper with two kinds of energy-absorbing modes according to claim 1 is characterized in that, the material of described upper strata rigid structure (31) or lower floor's rigid structure (32) replaces with the non-metallic material that comprises carbon fiber.
5. the Federal bumper with two kinds of energy-absorbing modes according to claim 1 is characterized in that, described go up energy absorbent block (21) and following energy absorbent block (22) at upper and lower at least respectively being one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101734377A CN101844550B (en) | 2010-05-10 | 2010-05-10 | Automobile bumper with two energy-absorbing modes |
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| CN2010101734377A CN101844550B (en) | 2010-05-10 | 2010-05-10 | Automobile bumper with two energy-absorbing modes |
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| CN101844550A true CN101844550A (en) | 2010-09-29 |
| CN101844550B CN101844550B (en) | 2012-02-08 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717768A (en) * | 2012-06-20 | 2012-10-10 | 湖南大学 | Front bumper system for protecting shanks of pedestrian from being hurt |
| CN103287381A (en) * | 2013-06-18 | 2013-09-11 | 延锋彼欧汽车外饰系统有限公司 | Energy absorption device of automobile |
| CN104290697A (en) * | 2014-10-27 | 2015-01-21 | 重庆市永宏陈记实业有限公司 | Automobile bumper device |
| CN104386010A (en) * | 2014-10-27 | 2015-03-04 | 重庆市永宏陈记实业有限公司 | Composite shock absorption type vehicle bumper device |
| CN105270474A (en) * | 2015-11-02 | 2016-01-27 | 重庆至信实业有限公司 | Front anti-collision beam assembly of automobile |
| CN105270475A (en) * | 2015-11-02 | 2016-01-27 | 重庆至信实业有限公司 | Front anti-collision beam of automobile |
| US10272858B2 (en) | 2017-04-20 | 2019-04-30 | Ford Global Technologies, Llc | Bumper assembly |
| US10640066B1 (en) | 2018-10-22 | 2020-05-05 | Ford Global Technologies, Llc | Vehicle energy absorber |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ2014889A3 (en) * | 2014-12-11 | 2016-06-22 | Ĺ KODA AUTO a.s. | Vehicle bumper |
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| CN2152714Y (en) * | 1993-03-22 | 1994-01-12 | 雷发君 | Impact absorbing device for automobile collision |
| EP1273483A2 (en) * | 2001-07-05 | 2003-01-08 | Dynamit Nobel Kunststoff GmbH | Bumper support for improved pedestrian protection on motor vehicles |
| CN100347008C (en) * | 2002-08-23 | 2007-11-07 | 通用电气公司 | Pedestrian energy absorber for automotive vehicles |
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| CN2152714Y (en) * | 1993-03-22 | 1994-01-12 | 雷发君 | Impact absorbing device for automobile collision |
| EP1273483A2 (en) * | 2001-07-05 | 2003-01-08 | Dynamit Nobel Kunststoff GmbH | Bumper support for improved pedestrian protection on motor vehicles |
| CN100347008C (en) * | 2002-08-23 | 2007-11-07 | 通用电气公司 | Pedestrian energy absorber for automotive vehicles |
Non-Patent Citations (1)
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| 《汽车工程》 20091231 王元博 等 考虑行人腿部保护和低速碰撞特性的保险杠系统概念设计 全文 1-5 第31卷, 第12期 2 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717768A (en) * | 2012-06-20 | 2012-10-10 | 湖南大学 | Front bumper system for protecting shanks of pedestrian from being hurt |
| CN103287381A (en) * | 2013-06-18 | 2013-09-11 | 延锋彼欧汽车外饰系统有限公司 | Energy absorption device of automobile |
| CN103287381B (en) * | 2013-06-18 | 2016-01-20 | 延锋彼欧汽车外饰系统有限公司 | A kind of energy absorption device of automobile |
| US9878687B2 (en) | 2013-06-18 | 2018-01-30 | Compagnie Plastic Omnium | Vehicle energy absorbing device |
| CN104290697A (en) * | 2014-10-27 | 2015-01-21 | 重庆市永宏陈记实业有限公司 | Automobile bumper device |
| CN104386010A (en) * | 2014-10-27 | 2015-03-04 | 重庆市永宏陈记实业有限公司 | Composite shock absorption type vehicle bumper device |
| CN105270474A (en) * | 2015-11-02 | 2016-01-27 | 重庆至信实业有限公司 | Front anti-collision beam assembly of automobile |
| CN105270475A (en) * | 2015-11-02 | 2016-01-27 | 重庆至信实业有限公司 | Front anti-collision beam of automobile |
| US10272858B2 (en) | 2017-04-20 | 2019-04-30 | Ford Global Technologies, Llc | Bumper assembly |
| US10640066B1 (en) | 2018-10-22 | 2020-05-05 | Ford Global Technologies, Llc | Vehicle energy absorber |
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| Publication number | Publication date |
|---|---|
| CN101844550B (en) | 2012-02-08 |
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