WO2012007261A1 - Structure d'absorption d'énergie de collision à rigidité variable et procédé pour ajuster la rigidité d'une structure d'absorption d'énergie de collision - Google Patents

Structure d'absorption d'énergie de collision à rigidité variable et procédé pour ajuster la rigidité d'une structure d'absorption d'énergie de collision Download PDF

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Publication number
WO2012007261A1
WO2012007261A1 PCT/EP2011/060601 EP2011060601W WO2012007261A1 WO 2012007261 A1 WO2012007261 A1 WO 2012007261A1 EP 2011060601 W EP2011060601 W EP 2011060601W WO 2012007261 A1 WO2012007261 A1 WO 2012007261A1
Authority
WO
WIPO (PCT)
Prior art keywords
die
impact energy
energy absorption
absorption structure
deformation element
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.)
Ceased
Application number
PCT/EP2011/060601
Other languages
German (de)
English (en)
Inventor
Thomas Friedrich
Bernd Goetzelmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE102011004957A external-priority patent/DE102011004957A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP11727183.3A priority Critical patent/EP2613974A1/fr
Publication of WO2012007261A1 publication Critical patent/WO2012007261A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B60R19/24—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
    • 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
    • B60R2019/262—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means with means to adjust or regulate the amount of energy to be absorbed

Definitions

  • the present invention relates to a variable-stiffness impact energy absorption structure, a method of adjusting a rigidity of an impact energy absorption structure, and a corresponding control device according to the main claims.
  • Rejuvenation diameter can be varied and thus the rigidity can be adjusted.
  • one or more actuators may displace one or more sliders so that the sliders do not support one, or more die plates as desired.
  • a deformation element would be pulled through the supported die plates and thereby deform.
  • the unsupported die plates deviate radially from the deformation element.
  • the present invention provides an improved variable stiffness impact energy absorption structure, an improved impact energy absorption structure stiffness adjusting method, and a corresponding control apparatus according to the main claims.
  • Advantageous embodiments emerge from the respective subclaims and the following description.
  • the invention is based on the finding that an impact energy absorption structure can be continuously adjusted to any desired rigidity as an adaptive crash structure according to the principle of the taper in a defined range.
  • the principle can also be applied to other absorption techniques, e.g. Widening be transferred.
  • the present invention provides a variable stiffness impact energy absorption structure having a die for deforming a deformation element when the deformation element abuts a working surface of the die and performs relative movement to the die along a movement axis toward the die, the deformation element being deformed by irreversible deformation Impact energy absorbed, and wherein a maximum opening width of the die defines the rigidity, and wherein the die on a, the working surface opposite side has at least one support surface.
  • the impact energy absorption structure comprises at least one blocking device for adjusting the opening width of the die, wherein the blocking device is designed to rest on the support surface of the die in order to limit the opening width.
  • the present invention further provides a method of adjusting a stiffness of an impact energy absorbing structure
  • the impact energy absorbing structure comprises a die for deforming a deformation member when the deformation member abuts a working surface of the die and moves relative to the die along a moving axis toward the die and wherein a maximum opening width of the die defines the rigidity
  • the die has at least one support surface on a side opposite the working surface
  • the impact energy absorption structure comprises at least one locking device for adjusting the maximum opening width of the die Locking device det, to abut on the support surface of the die to limit the maximum opening width
  • the method comprising a step of reading in an adjustment signal for adjusting the stiffness of the impact energy absorbing structure and a step of moving the locking means to the maximum opening width adjust the die to thereby the
  • An absorption structure can be understood as a device for converting an impact energy.
  • the absorption structure can at least partially perform a change in shape, which reduces the impact energy via deformation work.
  • an original form of the absorption structure can be irreversibly changed.
  • external dimensions of at least parts of the absorbent structure may become smaller or larger.
  • stiffness may influence a degree of deformation, and thus, a level of the necessary strain work.
  • a deformation element may, for example, be a round or square tube, which changes a diameter and / or a contour during a movement through or over a die.
  • the die can be a device with a funnel-shaped narrowed passage opening or a conical widening. Via the funnel-shaped or conically tapered surfaces, a pressure necessary for the change in shape can be exerted on the deformation element.
  • a degree of deformation of the deformation member can be reduced.
  • a locking device can provide the back pressure necessary for the deformation or the counterforce required for the deformation.
  • a support surface may be an inclined plane or surface on which rests the locking device.
  • the locking device can influence an opening width of the die by means of the inclined plane.
  • the adaptive impact energy absorption structure (crash structure) can be preset to a desired stiffness, then no further adjustment of the stiffness is made before or after a certain point in time during the crash. Otherwise, the stiffness of the adaptive impact energy absorption structure under load, ie, during the crash
  • the present invention further provides a control device which is designed to carry out or implement the steps of the method according to the invention in corresponding devices. Also by this embodiment of the
  • a control device can be understood as meaning an electrical device which processes sensor signals and outputs control signals in dependence thereon.
  • the control unit may have an interface, which may be formed in hardware and / or software.
  • the interfaces can be part of a so-called system ASIC, for example, which contains various functions of the control unit.
  • the interfaces are their own integrated circuits or at least partially consist of discrete components.
  • the interfaces may be software modules that are present, for example, on a microcontroller in addition to other software modules.
  • a computer program product with program code which can be stored on a machine-readable carrier such as a semiconductor memory, a hard disk memory or an optical memory and is used to carry out the method according to one of the embodiments described above if the program is on a computer corresponding to a computer is also of advantage Device is running.
  • an extension direction of the support surface may be aligned at an acute angle to the axis of movement, and the blocking device may be movable along the movement axis in order to displace the die perpendicular to the movement axis. push and to limit the opening width of the die.
  • a direction of extension of the support surface may be aligned along the axis of movement.
  • the extension direction can be aligned transversely to the axis of movement. Then, the adjustment of the die perpendicular to the axis of movement can take place via a rotation of the locking device about the axis of movement. As a result, by means of a small holding force on the blocking element, a large pressure on the die can be supported.
  • the support surface may also have a curvature or trajectory in the direction of extension. This allows between the blocking element and the
  • Support surface to be set a predefined static friction, and in a collision, the necessary holding force for the locking element can be reduced.
  • the switching times can also be optimized.
  • the blocking element may have a curvature on a bearing surface to the die and be formed to contact the support surface at least in a line shape. This can prevent the locking element from tilting on the support surface. A predetermined contact surface can be maintained.
  • the die may include at least a first portion and a second portion elastically connected to each other, the first portion and the second portion each having a working surface and a support surface disposed on opposite sides of the respective portions are, wherein the first portion and the second portion are formed to completely enclose the deformation element or to be fully enclosed by the deformation element.
  • the first work surface and the second work surface may have the same orientation with respect to the movement axis, that is, either both directed inward, or both directed outward. As a result, a uniform distribution of the pressure over the die and the deformation element can be achieved.
  • the deformation element can be compressed or stretched.
  • the die may comprise the first section, the second section and at least one further section, which coincides with the the first portion and the second portion is elastically connected and which has a working surface and a support surface which are arranged on opposite sides of the further portion, wherein the first portion and the second portion and at least the further portion are formed to enclose the deformation element in full or to be fully enclosed by the deformation element.
  • the working surface may be arranged at an acute angle to the movement axis, and configured to receive the deformation element in a first region of the working surface, and to deform the deformation element in a second region, the second region being the first region in FIG Reference is upstream of the axis of movement.
  • the second area of the work surface may have a shape that corresponds to an outer contour of the deformation element when the device has a minimum rigidity.
  • a defined deformation of the deformation element can be ensured at different opening widths of the die. Due to the defined deformation, the energy absorption can be safely and easily controlled.
  • FIG. 1 is a diagram for explaining the principle of operation of a variable-stiffness impact energy absorption structure according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method of absorbing impact energy having a variable stiffness structure according to an embodiment of the present invention
  • Fig. 3 is an illustration of an impact energy absorption structure
  • 4a, 4b, 4c are illustrations of an impact energy absorption structure with a high rigidity according to an embodiment of the present invention
  • 5a, 5b, 5c are illustrations of an impact energy absorption structure having an average stiffness according to an embodiment of the present invention.
  • 6a, 6b, 6c are illustrations of a low stiffness impact energy absorption structure according to an embodiment of the present invention.
  • FIG. 7 is a plan view of a high rigidity impact energy absorbing structure according to an embodiment of the present invention.
  • FIG. 8 is a plan view of a low stiffness impact energy absorption structure according to an embodiment of the present invention.
  • An impact energy absorption structure 100 with variable rigidity has a die 102 for deforming a deformation element 104, and a locking device 106 for adjusting the opening force. tion width of the die 102 on.
  • the deformation element 104 is pushed onto a working surface of the die 102. In this case, the deformation element 104 is irreversibly deformed. Formation work is necessary for the deformation, which absorbs the energy of the impact.
  • a pressure acts on the die 102 during the deformation away from the deformation member 104.
  • This pressure is supported via a support surface of the in the direction of movement of the deformation element 104 axially parallel movable locking device 106, so that the die 102 can not escape.
  • a position of the locking device 106 limits a path that the die 102 can retreat under the pressure of the deformation element 104.
  • FIG. 2 shows a flowchart of a method for adjusting a stiffness of an impact energy absorption structure.
  • an impact energy absorption structure which comprises a die for deforming a deformation element, when the deformation element abuts against a working surface of the die and performs a relative movement to the die along a movement axis on the die, and wherein a maximum opening width of the die, the rigidity of Impact energy absorption structure defined.
  • the die has at least one support surface on a side opposite the working surface, and the impact energy absorbing structure comprises at least one locking means for adjusting the maximum opening width of the die, the locking means being adapted to abut the support surface of the die by the maximum opening width
  • a step 202 of reading in reading in a setting signal for adjusting the rigidity of the impact energy absorption structure, for example, from a unit performing an evaluation of sensor signals and then determining the severity of the impact in a collision of the vehicle with a Object determined.
  • step 204 of moving the lock means is moved to adjust the maximum opening width of the die to thereby adjust the rigidity of the impact energy absorption structure.
  • a maximum amount of deformation by the die is determined by the locking means.
  • a height of the deformation work is influenced, which determines a proportion of the impact energy per distance traveled by the deformation element past the die.
  • a length of the deformation element a large range of impact energies can be absorbed. This may mean that in a low impact energy impact the same
  • Path is traveled at the deformation element, as in a collision with high impact energy.
  • a stiffness of the impact energy absorption structure can be infinitely adjusted so that, for example, vehicle occupants can be optimally protected in a multiplicity of possible impact possibilities.
  • Fig. 3 shows an impact energy absorption structure with three possible stages of energy absorption in a sectional view (left partial image of Fig. 3) and a plan view (right partial image of Fig. 3). These three stages are realized via three dies 102 with different inner diameters.
  • Sliders 304 driven by actuators, can each occupy three positions 306.
  • the slides 304 each prevent an evasive movement of at least one of the three matrices.
  • a deformation member 104 will collide with the dies 102 during impact and movement on the dies 102
  • the impact energy absorption structure is disposed between a cross member 310 and a side rail 312 of a vehicle and mounted in a housing 314.
  • An impact is registered, for example, by a radar beam emitted by a radar chip 316 and reflected and evaluated at a reflector 318.
  • an elastic element 320 is arranged, which absorbs small impact energies without permanent deformation.
  • a controller 322 processes the information and, depending on the severity of the impact, actuates the actuators for the sliders 304.
  • FIGS. 4 a, 4 b, 4 c, 5 a, 5 b, 5 c, 6 a, 6 b, 6 c, 7 and 8 show a continuously adaptive crash structure by means of a blocking element which can be moved axially parallel to the crash direction according to an exemplary embodiment of the present invention.
  • Housing parts and actuators for setting the adaptive crash structure are known from the prior art and are therefore not shown for clarity.
  • FIG. 4a, 4b, 4c and 7 show a stiff setting of the impact energy absorption structure.
  • Figures 5a, 5b and 5c show an adjustment of the moderate energy impact energy absorption structure, and
  • Figures 6a, 6b, 6c and 8 show an adjustment of the impact energy absorption structure with the softest stiffness.
  • FIG. 4a shows a spatial representation of the impact energy absorption structure according to an exemplary embodiment of the present invention in an adjustment in which a deformation element (not shown here) would experience a maximum possible deformation if the deformation element were to be deformed Impact is driven by the impact energy absorption structure.
  • the locking ring 106 completely encloses the matrix.
  • the die is composed of four segments in this embodiment. The segments are pressed by spring clips in against the locking ring. Alternatively, the springs can also press the segments against each other.
  • FIG. 4b shows a section A-A through the impact energy absorption structure in FIG. 4a along a section A-A as shown in FIG.
  • the locking ring 106 is in surface contact 404 on the support surfaces 402 of the die.
  • FIG. 4c shows a section B-B through the impact energy absorption structure in FIG. 4a along a section line B-B as shown in FIG. The cut runs through parting lines between the die segments.
  • FIG. 5a shows a spatial representation of the impact energy absorption structure according to an exemplary embodiment of the present invention in a setting in which a deformation element, not shown here, would undergo a deformation with medium rigidity of the absorption structure, if the deformation element is impacted by the impact energy absorption structure is driven.
  • the locking ring 106 completely encloses the matrix.
  • the locking ring 106 can limit an evasion movement of the die in the event of impact by contact with the support surfaces 402 on the die.
  • the die is composed of four segments in this embodiment.
  • Segments are held in position by spring clips 504 relative to one another.
  • FIGS. 5b and 5c show sections corresponding to the sections in FIGS. 4b and 4c.
  • the lock ring is supported on a track 502 on the support surfaces 402 such that there is sufficient friction between the die and the lock ring to hold the lock ring in place as the deformation element is pulled through the die.
  • FIG. 6 a shows a spatial representation of the impact energy absorption structure according to an embodiment of the present invention in a setting in which a deformation element, not shown here, has a minimal deformation formation would be experienced when the deformation element is driven in an impact by the impact energy absorption structure.
  • the locking ring 106 completely encloses the matrix of four die segments 602. Thus, the locking ring 106 can limit an evasive movement of the die segments 602 in the event of impact by contact with the support surfaces 402 on the die segments 602.
  • FIG. 6b shows a section E-E through the impact energy absorption structure in FIG. 6a along a section line E-E as shown in FIG. 8. Between the locking ring and the support surfaces there is a line contact 604, so that the locking ring can not tilt on the support surfaces.
  • FIG. 6c shows a section F-F through the impact energy absorption structure in FIG. 6a along a section line F-F as shown in FIG. The cut passes through the open parting lines between the die segments.
  • FIG. 7 shows a plan view of the impact energy absorption structure according to an embodiment of the present invention in a setting in which a deformation element 104 would experience deformation at a maximum possible rigidity of the absorption structure when the deformation element 104 is impacted by the impact energy absorption structure is driven.
  • the die segments 602 are held in position by the locking member 106.
  • the sectional profile A-A of the section A-A in Fig. 4b is located.
  • the section B-B of the section B-B in Fig. 4c is shown.
  • FIG. 8 shows a plan view of the impact energy absorbing structure according to an embodiment of the present invention in a setting in which a deformation element 104 would experience a minimum deformation, ie, a minimum rigidity of the impact energy absorbing structure, when the deformation element 104 is impacted by the impact force Impact energy absorption structure is driven.
  • the die segments 602 are spaced apart and held in position by the locking member 106.
  • the sectional profile EE of the section EE in FIG. 6b is shown in the plan view.
  • the sectional profile FF of the section FF in Fig. 6c is shown.
  • the female mold segments 602 in open setting have an inner contour, which corresponds to an outer contour of the deformation element 104, so that when the die segments 602 are closed in the middle on the die segments 602, a greater deformation of the deformation element 104 occurs than at edges of the die segments 602.
  • the support is implemented in the illustrated variant such that support surfaces 402 are mounted on the die segments, which are curved in a plane such that with the stiffest setting the locking ring 106 with a flat contact 404 (ie, a two-dimensional region) abuts against the die segments 602 , Then, the lock ring 106 is up, as shown in Figures 4a, 4b, 4c and 7.
  • line contact 604 i.e., a one-dimensional contact area
  • line contact 604 initially forms at these contact points in the course of the crash, which can then become planar as a result of elastic or even plastic changes in shape of the components.
  • the curvature is therefore advantageous because it reduces positioning times.
  • the angle of the trajectory 502 can be optimized at any point to the extent that the frictional forces during a crash, although large enough to hold the locking ring 106 in the desired position, but the travel of the locking ring 106 is still kept small. It is also possible to apply a convex contact surface on the die segments 602, so that point contacts can occur, but no tilting occurs. If the friction between the locking ring 106 and the die segment 602 is small and / or the angle is large, an actuator or other mechanism should hold the locking ring 106 in position.
  • a locking ring 106 which supports all die segments 602 in the same position. It is also conceivable to use a blocking element 106 individually for each material segment 602.
  • the figures show a variant with 4 die segments 602 and eight bending springs 504, which hold the die segments 602 together. Instead of eight such springs 504 but less or only one spring can be used for this purpose. Also shown is a variant which, in principle, can also be adapted during an advanced crash.
  • Fig. 7 shows the die segments
  • FIG. 8 shows the die segments 602 with the locking ring 106 and the deformation element 104 with the softest adjustment of the adaptive crash structure.
  • the die segments 602 have been designed here so that their inner diameters are concentric with the softest adjustment of the adaptive crash structure. For a stiffer setting, the die segments 602 are shifted inwardly until they abut each other at the stiffest setting. As a result, the inner diameters form a kind of square with curved edges.
  • the tube 104 will assume its tubular cross-section in an intermediate shape between the pipe and 4-Kant-tube during the tapering. As a result, no edge burying occurs. If the inner diameters of the die segments 602 were concentric with the most rigid adjustment of the adaptive crash structure, the edges of the die segments 602 would bite into the tube 104 at a softer setting.
  • the Ausschmatrize from one piece with predetermined breaking points. Then the springs 504 can be completely saved. Also, the number of die segments 602 is adjustable up and down.

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  • Mechanical Engineering (AREA)
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Abstract

L'invention concerne une structure d'absorption d'énergie de collision (100) à rigidité variable. Cette structure d'absorption d'énergie de collision comprend une matrice (102) conçue pour déformer un élément déformable (104) lorsque cet élément déformable repose sur une surface de travail de la matrice et effectue un mouvement relatif par rapport à la matrice le long d'un axe de mouvement vers la matrice. Une largeur d'ouverture de la matrice définit la rigidité. Cette matrice comporte au moins une surface d'appui sur un côté opposé à la surface de travail. La structure d'absorption d'énergie de collision selon l'invention comprend en outre au moins un dispositif de blocage (106) servant à ajuster la largeur d'ouverture maximale de la matrice, ce dispositif de blocage étant conçu pour reposer sur la surface d'appui de la matrice afin de limiter ladite largeur d'ouverture maximale.
PCT/EP2011/060601 2010-07-16 2011-06-24 Structure d'absorption d'énergie de collision à rigidité variable et procédé pour ajuster la rigidité d'une structure d'absorption d'énergie de collision Ceased WO2012007261A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11727183.3A EP2613974A1 (fr) 2010-07-16 2011-06-24 Structure d'absorption d'énergie de collision à rigidité variable et procédé pour ajuster la rigidité d'une structure d'absorption d'énergie de collision

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE102010031431.5 2010-07-16
DE102010031431 2010-07-16
DE102010038610 2010-07-29
DE102010038610.3 2010-07-29
DE102011004957A DE102011004957A1 (de) 2010-07-16 2011-03-02 Aufprallenergie-Absorptionsstruktur mit variabler Steifigkeit und Verfahren zum Einstellen einer Steifigkeit einer Aufprallenergie-Absorptionsstruktur
DE102011004957.6 2011-03-02
DE102011004948A DE102011004948A1 (de) 2010-07-16 2011-03-02 Crashstruktur mit einstellbarer Steifigkeit für ein Deformationselement für ein Fahrzeug
DE102011004948.7 2011-03-02

Publications (1)

Publication Number Publication Date
WO2012007261A1 true WO2012007261A1 (fr) 2012-01-19

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PCT/EP2011/060601 Ceased WO2012007261A1 (fr) 2010-07-16 2011-06-24 Structure d'absorption d'énergie de collision à rigidité variable et procédé pour ajuster la rigidité d'une structure d'absorption d'énergie de collision

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2593335A1 (fr) * 2010-07-16 2013-05-22 Robert Bosch GmbH Structure de collision à rigidité ajustable conçue pour un élément déformable de véhicule
CN106347404A (zh) * 2016-09-28 2017-01-25 中南大学 一种轨道车辆用碰撞吸能装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19745656A1 (de) * 1997-10-16 1999-04-22 Daimler Chrysler Ag Pralldämpfer für ein Kraftfahrzeug
WO2011035952A1 (fr) * 2009-09-24 2011-03-31 Robert Bosch Gmbh Dispositif et procédé de réduction adaptative de l'énergie de collision
WO2011061320A1 (fr) * 2009-11-23 2011-05-26 Robert Bosch Gmbh Appareil de commande destiné au réglage d'un dispositif permettant la dégradation adaptative de l'énergie de collision pour un véhicule, dispositif permettant la dégradation adaptative de l'énergie de collision pour un véhicule et procédé de réglage d'un dispositif permettant la dégradation adaptative de l'énergie de collision pour un véhicule

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19745656A1 (de) * 1997-10-16 1999-04-22 Daimler Chrysler Ag Pralldämpfer für ein Kraftfahrzeug
DE19745656C2 (de) 1997-10-16 2000-06-21 Daimler Chrysler Ag Pralldämpfer für ein Kraftfahrzeug
WO2011035952A1 (fr) * 2009-09-24 2011-03-31 Robert Bosch Gmbh Dispositif et procédé de réduction adaptative de l'énergie de collision
WO2011061320A1 (fr) * 2009-11-23 2011-05-26 Robert Bosch Gmbh Appareil de commande destiné au réglage d'un dispositif permettant la dégradation adaptative de l'énergie de collision pour un véhicule, dispositif permettant la dégradation adaptative de l'énergie de collision pour un véhicule et procédé de réglage d'un dispositif permettant la dégradation adaptative de l'énergie de collision pour un véhicule

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2593335A1 (fr) * 2010-07-16 2013-05-22 Robert Bosch GmbH Structure de collision à rigidité ajustable conçue pour un élément déformable de véhicule
CN106347404A (zh) * 2016-09-28 2017-01-25 中南大学 一种轨道车辆用碰撞吸能装置

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