GB2527926A - Structural member for a vehicle as well as a crash management system comprising such a structural member - Google Patents
Structural member for a vehicle as well as a crash management system comprising such a structural member Download PDFInfo
- Publication number
- GB2527926A GB2527926A GB1508695.2A GB201508695A GB2527926A GB 2527926 A GB2527926 A GB 2527926A GB 201508695 A GB201508695 A GB 201508695A GB 2527926 A GB2527926 A GB 2527926A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bumper
- structural member
- vehicle
- management system
- electric current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- 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
- B60R19/03—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by material, e.g. composite
-
- 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
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
-
- 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
-
- 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
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
- B60R2021/343—Protecting non-occupants of a vehicle, e.g. pedestrians using deformable body panel, bodywork or components
-
- 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
- B60R21/0134—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 imminent contact with an obstacle, e.g. using radar systems
Abstract
A structural member, configured as a bumper 10, for a vehicle (32) is configured to be variably adjusted by means of electric current thereby variably adjusting a force counteracting an impact of an object (36, 38) against the structural member. The bumper may comprise at least one layer 12 of a smart material, such as a shape memory alloy or shape memory polymer, which changes stiffness when electric current is passed through it. Layer 12 of smart material is optionally arranged between further layers 14, 16 made of a polymer material. The smart bumper may form part of a crash management system (26) comprising electronic control circuit 28 to supply electric current to the bumper from battery 30. Crash management system (26) may further comprise a detecting device (34), that may include a camera (40), to detect whether an object about to collide with the bumper is a pedestrian (36).
Description
Structural Member for a Vehicle as well as a Crash Management System comprising such a Structural Member The invention relates to a structural member according to the preamble of patent claim 1 as well as a crash management system comprising such a structural member.
Such a structural member for a vehicle, in particular a passenger vehicle, can be found in DE 10246865 34. The structural member is configured to be variably adjusted by means of electric current thereby variably adjusting a force counteracting an impact of an object against the structural member. This means, for example, a pre-stressing, pre-load or stiffness of the structural member can be adjusted by means of electric current, said pre-stressing, pre-load or stiffness counteracting an impact of an object against the structural member.
Moreover, DE 10 2006 026 447 34 shows an impact absorber comprising a foam structure, wherein the rigidity of the impact absorber is variably controlled by a crash sensor system.
It is an object of the present invention to provide a structural member as well as a crash management system by means of which a particularly advantageous crash behavior of a vehicle can be realized.
This object is solved by a structural member having the features of patent claim 1 as well as a crash management system having the features of patent claim 6. Advantageous embodiments with expedient developments of the invention are indicated in the other patent claims.
In order to provide a structural member of the kind indicated in the preamble of patent claim 1, by means of which structural member a particularly advantageous crash behavior of the vehicle can be realized according to the present invention the structural member is configured as a bumper for the vehicle. Thus, the force counteracting an impact of an object against the structural member and thus, for example, the stiffness of the structural member can variably adjusted in a need-based manner. This means, for example, a high stiffness and thus, a high force counteracting the impact can be adjusted when the object colliding with the bumper is a vehicle. When the object colliding with a bumper is a pedestrian a particularly low stiffness of the bumper can be adjusted thereby protecting the pedestrian. Thus, the bumper according to the present invention is a smart bumper having a dynamic active stiffness which solves two contradictory needs that the bumper needs to suffice, i.e. on one hand the bumper needs to be stiff or rigid for low speed impact with another vehicle. On the other hand the bumper needs to be soft for pedestrian impact. Thus, the bumper, according to the present invention, helps mitigate the effect of a pedestrian or low speed impact when, for example, a pedestrian or another vehicle collides with the bumper. For example, when the bumper is not supplied with electric current, i.e. an electrical input, the bumper remains stiff and rigid for a collision with another vehicle. When the bumper is supplied with electricity, i.e. electric current, the stiffness of the bumper is reduced for a collision with a pedestrian.
The invention also relates to a crash management system for a vehicle, in particular a passenger vehicle, the crash management system comprising at least one structural member, i.e. a bumper according to the present invention. Moreover, the crash management system comprises a detecting device configured to determine whether or not the object is a pedestrian. Furthermore, the detecting device is configured to adjust the structural member and thus the force on the basis of the determined object. Thus, a particularly high stiffness of the bumper can be adjusted when the detecting device detects that the object colliding with the bumper is not a pedestrian. When the detecting device detects the object colliding with the bumper is a pedestrian a particularly low stiffness of the bumper can be adjusted thereby protecting the pedestrian.
Further advantages, features, and details of the invention derive from the following description of a preferred embodiment as well as from the drawings. The features and feature combinations previously mentioned in the description as well as the features and feature combinations mentioned in the following description of the figures and/or shown in the figures alone can be employed not only in the respectively indicated combination but also in other combination or taken alone without leaving the scope of the invention.
The drawing shows in: Fig. 1 a schematic sectional view of a structural member for a vehicle, the structural member being configured as a bumper which is variably adjustable by means of electric current thereby adjusting a force counteracting an impact of an object against the bumper; Fig. 2 a schematic view of a layer of the bumper, the layer being made of a smart material configured to be variably adjusted with respect to the shape of the layer by means of electric current thereby variably adjusting the force counteracting the impact; Fig. 3 a schematic side view of the vehicle and the object in the form of another vehicle; Fig. 4 a further schematic side view of the vehicle and the object in the form of a pedestrian; and Fig. 5 a flow diagram illustrating a method for operating a crash management system comprising the bumper.
In the figures the same elements or elements having the same functions are indicated by the same reference signs.
Fig. 1 shows in a schematic sectional view a structural member in the form of a bumper for a vehicle, in particular a passenger vehicle. The bumper 10 is configured to be variably adjusted by means of electric current thereby variably adjusting the stiffness and thus a force counteracting an impact of an object against the bumper 10. As can be seen from Fig. 1, the bumper 10 comprises a first layer 12 made of a smart material configured to be variably adjusted with respect to the shape of the layer 12 by means of electric current thereby variably adjusting the stiffness and thus the force counteracting the impact. For example, the smart material is a shape memory alloy or a shape memory polymer or any smart material like nano-polymers which change the stiffness when electric current is passed through them. This means the layer 12 and thus the smart material can be supplied with electric current, i.e. electricity thereby changing the stiffness of the layer 12. For example, by supplying the layer 12 with electric current the shape of the layer 12 can be varied. For example, the electric current heats the smart material thereby reducing the stiffness or the stiffness can be reduced by virtue of passing current, i.e. reaction of the material to current and not heating.
The first layer 12 is arranged between further layers 14 and 16 of the bumper 10, wherein the layers 14 and 16 are made of a material being different from said smart material. In the present case the smart material and thus the layer 12 is incorporated in a thin block so that the first layer 12 is sandwiched between the layers 14 and 16 which are made of a general bumper material. For example, at least one of the layers 14 and 16 is made of PP (polypropylene) and/or EPDM (ethylene propylene diene monomer) and talc in varying percentages. This means the layers 14 and 16 are made of, for example, a polymer respectively.
As can be seen from Figs. 1 and 2 respective outer surfaces 18 and 20 of the smart material and thus the layer 12 are etched with conductive tracks 22 and 24 through which the electric current can flow. For example, the conductive tracks 22 and 24 are similar to printed circuit boards (PCB). The conductive tracks 22 and 24 provide respective paths for the electric current to flow into and through the smart material.
As will be described in greater detail below the bumper 10 is part of a crash management system 26 comprising an electronic control unit 28 (ECU) configured to control the supply of electric current to the bumper 10. The crash management system 26 further comprises a battery 30 configured to store electric energy, wherein the bumper 10 can be supplied with electric current and, thus, electric energy stored in battery 30 wherein the supply can be controlled by the electronic control unit 28. This means, the bumper 10 which is configured as a smart bumper can be activated by the electronic control unit 28 thereby supplying the bumper 10 with electric current from the battery 30 so that the stiffness of the bumper 10 is changed.
Figs. 3 and 4 show a vehicle comprising the crash management system 26, wherein said vehicle is indicated by 32. As can be seen from Figs. 3 and 4, the bumper 10 is a front bumper having a dynamic active stiffness. The crash management system 26 comprises the bumper 10 and a detecting device 34 configured to determine whether or not the object which is about to collide with the bumper 10 is a pedestrian 36. Alternatively, the object which is about to collide with the bumper 10 can be another vehicle 38. Moreover, the detecting device 34 is configured to adjust the bumper 10 and thus the stiffness or force counteracting the impact on the basis of the determined object. When the detecting device 34 detects that the vehicle 38 is colliding or about to collide with the bumper 10, in particular at low speeds, a particularly high stiffness of the bumper 10 is adjusted by means of the electronic control unit 28. For example, in this case the bumper 10 is not supplied with electric current. However, when the detecting device 34 detects that the object which is about to collide with the bumper is the pedestrian 36 a particularly low stiffness of the bumper 10 is adjusted in such a way that the electronic control unit 28 supplies electric current from the battery 30 to the bumper 10.
As can be seen from Fig. 4 the detecting device 34 comprises at least one camera 40 configured to capture images of the surroundings of the vehicle 32 and, in particular, of the object (pedestrian 36 or vehicle 38). The camera 40 provides at least one signal indicative of the captured images and thus the object. The detecting device 34 further comprises at least one further sensor such as a radar sensor 42 arranged at the front 44 of the vehicle 32. The radar sensor 42 is configured to detect the object and provide at least one signal indicative of the detected object. For example, the electric control unit 28 receives said signals, from, for example, various cameras, collision avoiding systems and radar sensors, wherein the electronic control unit 28 is configured to determine whether or not the detected object is a pedestrian on the basis of the received signals. This means, the electronic control unit interprets the received signals and only if there is a probable collision with a pedestrian the smart bumper is activated thereby reducing its stiffness so that the pedestrian 36 can be protected. Thus, the bumper 10 can be sufficiently stiff and rigid when the vehicle 32 collides with the vehicle 38. Moreover, the bumper 10 can be sufficiently soft when colliding with a pedestrian such as the pedestrian 36.
Preferably, the camera 40 is configured as a stereo camera and/or a 360°vision camera.
For example, by using the camera 40 and at least one radar sensor different objects can be detected and classified. Upon classification electric current can be supplied to the bumper 10 by means of the electronic control unit 28 thereby reducing the stiffness of the bumper 10. The bumper 10 is configured as a smart bumper having the ability of changing its stiffness based on the electric current and thus electrical input. The bumper remains stiff and rigid under normal conditions but it is less stiff, i.e. soft when supplied with electric current.
Fig. 5 shows a flow diagram illustrating a method for operating the crash management system 26. As can be seen from Fig. 5, the detecting device 34 comprises at least one sensor 46 configured to detect at least one object in the surroundings of the vehicle 32.
For example, the sensor 46 is the camera 40 or the radar sensor 42. The sensor 46 is configured to provide at least one signal indicative of the detected object. Said signal is transmitted to an electronic control unit 48 of the detecting device 34. The electronic control unit 48 is configured to determine whether or not the object detected by the sensor 46 is a pedestrian on the basis of the received signal provided by the sensor 46. A block of Fig. 5 illustrates said determination whether or not the detected object is a pedestrian. When the electronic control unit 48 determines that the detected object is a pedestrian a signal indicative of the detected pedestrian is transmitted to the electronic control unit 28 which receives said signal so that, on the basis of the received signal, the electronic control unit 28 can supply the bumper 10 with electric current from the battery thereby reducing the stiffness of the bumper 10. When at block 50 the electronic control unit 48 determines that the detected object is not a pedestrian the bumper 10 remains stiff and rigid. The bumper 10 can be configured as a rear bumper 52 of the vehicle 32 so that the vehicle 32 has a particularly advantageous crash behavior in the context of rear collisions.
List of reference signs bumper 12 first layer 14 layer 16 layer 18 surface surface 22 tracks 24 tracks 26 crash management system 28 electronic control unit battery 32 vehicle 34 detecting device 36 pedestrian 36 vehicle camera 42 radar sensor 44 front 46 sensor 46 electronic control unit block 52 rear bumper
Claims (7)
- Claims A structural member for a vehicle (32), the structural member being configured to be variably adjusted by means of electric current thereby variably adjusting a force counteracting an impact of an object (36, 38) against the structural member, characterized in that the structural member is configured as a bumper (10, 52) for the vehicle (32).
- 2. The structural member according to claim 1, characterized in that the bumper (10, 52) comprises at least one layer (12) made of a smart material configured to be variably adjusted with respect to the shape of the layer (12) by means of electric current thereby variably adjusting the force counteracting the impact.
- 3. The structural member according to claim 2, characterized in that the smart material is a shape memory alloy or shape memory polymer.
- 4. The structural member according to claim 2 or 3, characterized in that the layer (12) is arranged between further layers (14, 16) made of a material being different from the smart material.
- 5. The structural member according to claim 4, characterized in that the material is a polymer.
- 6. A crash management system (26) for a vehicle (32), the crash management system (26) comprising at least one structural member according to any one of the preceding claims, wherein the crash management system (26) comprises a detecting (34) device configured to: -determine whether or not the object (36, 38)is a pedestrian (36); and -adjust the structural member and thus the force on the basis of the determined object (36, 38).
- 7. The crash management system according to claim 6, characterized in that the detecting device (34) comprises at least one camera (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1508695.2A GB2527926A (en) | 2015-05-21 | 2015-05-21 | Structural member for a vehicle as well as a crash management system comprising such a structural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1508695.2A GB2527926A (en) | 2015-05-21 | 2015-05-21 | Structural member for a vehicle as well as a crash management system comprising such a structural member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201508695D0 GB201508695D0 (en) | 2015-07-01 |
| GB2527926A true GB2527926A (en) | 2016-01-06 |
Family
ID=53506103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1508695.2A Withdrawn GB2527926A (en) | 2015-05-21 | 2015-05-21 | Structural member for a vehicle as well as a crash management system comprising such a structural member |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2527926A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107719285A (en) * | 2017-09-30 | 2018-02-23 | 吉林大学 | A kind of pre-impact system based on marmem active protective device |
| FR3056175A1 (en) * | 2016-09-22 | 2018-03-23 | Plastic Omnium Cie | MOBILE BODY ELEMENT WITH SHAPE MEMORY ALLOY |
| US10235886B1 (en) | 2018-01-02 | 2019-03-19 | International Business Machines Corporation | Integral damage control by interaction between a collision detection system and a bumper system |
| CN109606296A (en) * | 2018-12-21 | 2019-04-12 | 吉林大学 | Assembly is protected under a kind of skeleton commercial vehicle of memorial alloy |
| US10618486B2 (en) | 2018-05-24 | 2020-04-14 | Ford Global Technologies, Llc | Bumper assembly with variable stiffness |
| GB2585332A (en) * | 2019-02-12 | 2021-01-13 | Chidziva Pasihapaori | Vehicle with moving object detector |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005145375A (en) * | 2003-11-19 | 2005-06-09 | Nissan Motor Co Ltd | Bumper structure |
| EP1593554A2 (en) * | 2004-05-03 | 2005-11-09 | C.R.F. Società Consortile per Azioni | Multi-function motor vehicle bumper |
| US20060202492A1 (en) * | 2005-03-08 | 2006-09-14 | William Barvosa-Carter | Reversibly expandable energy absorbing assembly and methods for operating the same |
| US20070068721A1 (en) * | 2004-06-09 | 2007-03-29 | Gm Global Technology Operations, Inc. | Hood lift mechanisms utilizing active materials and methods of use |
| US20080097699A1 (en) * | 2004-12-28 | 2008-04-24 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Vehicle motion control device |
| JP2009248580A (en) * | 2008-04-01 | 2009-10-29 | Honda Motor Co Ltd | Pedestrian airbag device |
| CN203126734U (en) * | 2013-02-26 | 2013-08-14 | 姜立成 | Automobile collision energy absorbing device |
-
2015
- 2015-05-21 GB GB1508695.2A patent/GB2527926A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005145375A (en) * | 2003-11-19 | 2005-06-09 | Nissan Motor Co Ltd | Bumper structure |
| EP1593554A2 (en) * | 2004-05-03 | 2005-11-09 | C.R.F. Società Consortile per Azioni | Multi-function motor vehicle bumper |
| US20070068721A1 (en) * | 2004-06-09 | 2007-03-29 | Gm Global Technology Operations, Inc. | Hood lift mechanisms utilizing active materials and methods of use |
| US20080097699A1 (en) * | 2004-12-28 | 2008-04-24 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Vehicle motion control device |
| US20060202492A1 (en) * | 2005-03-08 | 2006-09-14 | William Barvosa-Carter | Reversibly expandable energy absorbing assembly and methods for operating the same |
| JP2009248580A (en) * | 2008-04-01 | 2009-10-29 | Honda Motor Co Ltd | Pedestrian airbag device |
| CN203126734U (en) * | 2013-02-26 | 2013-08-14 | 姜立成 | Automobile collision energy absorbing device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3056175A1 (en) * | 2016-09-22 | 2018-03-23 | Plastic Omnium Cie | MOBILE BODY ELEMENT WITH SHAPE MEMORY ALLOY |
| CN107719285A (en) * | 2017-09-30 | 2018-02-23 | 吉林大学 | A kind of pre-impact system based on marmem active protective device |
| US10235886B1 (en) | 2018-01-02 | 2019-03-19 | International Business Machines Corporation | Integral damage control by interaction between a collision detection system and a bumper system |
| US10618486B2 (en) | 2018-05-24 | 2020-04-14 | Ford Global Technologies, Llc | Bumper assembly with variable stiffness |
| CN109606296A (en) * | 2018-12-21 | 2019-04-12 | 吉林大学 | Assembly is protected under a kind of skeleton commercial vehicle of memorial alloy |
| CN109606296B (en) * | 2018-12-21 | 2021-09-14 | 吉林大学 | Memory alloy framework type commercial vehicle lower protection assembly |
| GB2585332A (en) * | 2019-02-12 | 2021-01-13 | Chidziva Pasihapaori | Vehicle with moving object detector |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201508695D0 (en) | 2015-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |