DE4432082A1 - Safety bumper for cars, - Google Patents

Safety bumper for cars,

Info

Publication number
DE4432082A1
DE4432082A1 DE4432082A DE4432082A DE4432082A1 DE 4432082 A1 DE4432082 A1 DE 4432082A1 DE 4432082 A DE4432082 A DE 4432082A DE 4432082 A DE4432082 A DE 4432082A DE 4432082 A1 DE4432082 A1 DE 4432082A1
Authority
DE
Germany
Prior art keywords
compression
foam
deformable
energy
foams
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Withdrawn
Application number
DE4432082A
Other languages
German (de)
Inventor
Ulrich Dr Liman
Hans-Albrecht Dr Freitag
Hans Dipl Ing Kath
Klaus-Werner Dipl Ing Huland
Eckhard Dipl Ing Boigk
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.)
Bayer AG
Original Assignee
Bayer AG
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
Application filed by Bayer AG filed Critical Bayer AG
Priority to DE4432082A priority Critical patent/DE4432082A1/en
Publication of DE4432082A1 publication Critical patent/DE4432082A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • 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
    • B60R19/18—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
    • B60R19/22—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 containing mainly cellular material, e.g. solid foam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/37—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers of foam-like material, i.e. microcellular material, e.g. sponge rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vibration Dampers (AREA)

Abstract

The first of two energy absorbent media used, is reversibly deformable and has a first compressive modulus. The second is deformable with a larger modulus. At 50% and 10% compression, the ratio of its moduli is 1.5 at the greatest. The first medium absorbs a first impact energy by compression at least for a time, while the second medium is compressed by no more than 10%. Its deformable volume is dimensioned to absorb no more than 60% of a second impact energy. The first medium is foam with a ratio of moduli between 2 and 3, at 50% and 10% compression. Its modulus is smaller, near 50% compression. Its volume is so dimensioned, that it absorbs a first impact energy, by no more than 50% compression, at least for a time, whereas the second foam is compressed by no more than 10%. A variety of foams may be used, such as polypropylene, polystyrene, and polyurethane foams in suitable half-hard, and EA or 'energy-absorbing' modified grades may be used.

Description

Die vorliegende Erfindung betrifft einen neuartigen Stoßfänger auf Basis energie­ absorbierender Schaumstoffe, insbesondere für die Ausrüstung von Kraft­ fahrzeugen.The present invention relates to a novel bumper based on energy absorbent foams, in particular for the equipment of strength vehicles.

Flexible energieabsorbierende Schaumstoffe wurden bereits zur Vermeidung von Schäden am Kraftfahrzeug bei niedrigen Aufprallgeschwindigkeiten von kleiner als 4 km/h eingesetzt. Solche Schaumstoffe sollten einerseits einen ausreichend ausgeprägten Stauchspannungs-Hysteresis-Effekt aufweisen um einerseits eine aus­ reichende Energieabsorption zu gewährleisten, andererseits aber nach einer Stauchung aufgrund eines Aufpralls auf ein Hindernis ihre ursprüngliche Form wieder einnehmen und für einen erneuten Aufprall eine hinreichende Stauchhärte bewahren. Der Stauchspannungs-Hysterese-Effekt darf demgemäß nicht zu aus­ geprägt sein.Flexible energy absorbing foams have already been used to avoid Damage to the motor vehicle at low impact speeds of less than 4 km / h used. Such foams should on the one hand be sufficient have a pronounced compressive stress hysteresis effect on the one hand To ensure sufficient energy absorption, but on the other hand after a Compression due to an obstacle impacting its original shape take again and a sufficient compression hardness for a new impact preserve. The upsetting stress hysteresis effect must therefore not be too great being shaped.

Für höhere Aufprallgeschwindigkeit von 8 bzw. bis 18 km/h kommen Stoßfänger­ konstruktionen zur Anwendung, bei denen die Energieabsorption durch irreversible Verformung der Quer- und Längsträger des Fahrzeugchassis, bzw. hierfür vorge­ sehenen Teilen davon, erfolgt. Dies erfordert jedoch einen erheblichen Reparatur­ aufwand nach einem Aufprall.Bumpers come for higher impact speeds of 8 or up to 18 km / h constructions for use in which the energy absorption by irreversible Deformation of the cross members and side members of the vehicle chassis, or for this purpose seen parts of it. However, this requires considerable repair effort after an impact.

Erfindungsgemäß wird nun vorgeschlagen, für die Energieabsorption im Bereich der höheren Geschwindigkeit einen spröden energieabsorbierenden Schaumstoff einzusetzen, der im Falle eines Aufpralls irreversibel verformt wird, dessen Austausch aber einen erheblich reduzierten Reparaturaufwand erfordert. Der Schaumstoff wird mit einem reversibel deformierbaren Mittel zur Stoßdämpfung kombiniert, wobei das reversibel deformierbare Mittel Stöße mit Aufprallge­ schwindigkeiten im unteren Geschwindigkeitsbereich auffängt.According to the invention, it is now proposed for energy absorption in the area a brittle energy absorbing foam at the higher speed use, which is irreversibly deformed in the event of an impact, the Replacement, however, requires a significantly reduced repair effort. Of the Foam is made with a reversibly deformable shock absorbing agent  combined, the reversibly deformable agent bumps with impact speed in the lower speed range.

Gegenstand der vorliegenden Erfindung ist demgemäß ein Stoßfänger auf Basis energieabsorbierender Schaumstoffe enthaltendThe present invention accordingly relates to a bumper based containing energy absorbing foams

  • - erste energieabsorbierend reversibel deformierbare Mittel einer ersten Stauchhärte, und- first energy absorbing reversibly deformable means of a first Compression hardness, and
  • - zweite energieabsorbierend deformierbare Mittel bestehend aus Schaumstoff mit einer zweiten größeren Stauchhärte mit einem Verhältnis der Stauch­ härten bei 50% Stauchung und bei 10% Stauchung von höchstens 1,5.- Second energy absorbing deformable agent consisting of foam with a second larger compression hardness with a ratio of compression harden at 50% compression and at 10% compression of at most 1.5.

Vorzugsweise soll das erste Mittel eine Stoßenergie unter Stauchung zumindest zeitweise absorbieren können, wobei die Schaumstoffschicht um nicht mehr als 10% gestaucht wird. Dabei kann die erste Stoßenergie dem Aufprall eines Kraftfahrzeugs auf eine Wand mit einer Geschwindigkeit von 3 bis 5 km/h entsprechen.Preferably, the first means should at least have an impact energy under compression can absorb temporarily, the foam layer not more than 10% is compressed. The first impact energy can impact one Motor vehicle on a wall at a speed of 3 to 5 km / h correspond.

Das deformierbare Volumen des Schaumstoffs des zweiten Mittels soll vorzugsweise so bemessen sein, daß eine zweite Stoßenergie unter Stauchung des Schaumstoffs um nicht mehr als 60% absorbiert wird. Dabei kann die zweite Stoßenergie dem Aufprall eines Kraftfahrzeugs auf eine Wand mit einer Geschwindigkeit von 8 bis 18 km/h entsprechen.The deformable volume of the foam of the second agent should preferably be such that a second impact energy while compressing the Foam is absorbed by no more than 60%. The second Impact energy of a motor vehicle colliding with a wall Correspond to speeds of 8 to 18 km / h.

Als erste deformierbare Mittel sind im Prinzip alle an sich bekannten Mittel zur Stoßdämpfung geeignet, wie z. B. hydraulische Dämpfer, halbelastische Dämpfungsmodule, usw.In principle, all means known per se are the first deformable means Shock absorption suitable such. B. hydraulic damper, semi-elastic Damping modules, etc.

Vorzugsweise wird als erstes deformierbares Mittel ein Schaumstoff mit einem Verhältnis der Stauchhärten bei 50% Stauchung und bei 10% Stauchung von 2 bis 3 eingesetzt, wobei die Stauchhärte dieses ersten Schaumstoffs im Vergleich zu dem zweiten Schaumstoff (zweites deformierbares Mittel) mindestens im Bereich der Stauchung um jeweils bis 50% kleiner ist. Preferably, the first deformable agent is a foam with a Ratio of compression hardness at 50% compression and at 10% compression of 2 to 3 used, the compression hardness of this first foam compared to the second foam (second deformable agent) at least in the area the compression is up to 50% smaller.  

Vorzugsweise wird das deformierbare Volumen des ersten Schaumstoffs (erstes deformierbares Mittel) so bemessen, daß eine erste Stoßenergie unter Stauchung dieses ersten Schaumstoffs um nicht mehr als 50% zumindest zeitweise absorbiert werden kann, wobei der zweite Schaumstoff um nicht mehr als 10% gestaucht wird.The deformable volume of the first foam (first deformable means) dimensioned so that a first impact energy under compression of this first foam at least temporarily absorbed by no more than 50% can be, with the second foam compressed by no more than 10% becomes.

Als Schaumstoffe für das erste und zweite deformierbare Mittel können beliebige Schaumstoffe, die die obengenannten Bedingungen erfüllen, eingesetzt werden. Die absolute Stauchhärte der Schaumstoffe bestimmt lediglich das erforderliche deformierbare Schaumstoffvolumen. Zum Beispiel kann die Stauchhärte des ersten Schaumstoffs bei einer Stauchung um 50% bei 120 bis 250 kPa und die Stauchhärte des zweiten Schaumstoffs bei 50% Stauchung bei 150 bis 400 kPa liegen.Any foams can be used as foams for the first and second deformable agents Foams that meet the above conditions are used. The absolute compression hardness of the foams only determines what is required deformable foam volume. For example, the compression hardness of the first Foam with a compression of 50% at 120 to 250 kPa and the Compression hardness of the second foam at 50% compression at 150 to 400 kPa lie.

Zur Auswahl der erfindungsgemäß geeigneten Schaumstoffe kann die quasistatisch gemessene Stauchhärte zugrunde gelegt werden, da der Einfluß der Verformungsgeschwindigkeit auf die Stauchhärte in dem hier zur Diskussion stehenden Bereich gering ist.To select the foams suitable according to the invention, the quasi-static measured compression hardness are used as the influence of the Deformation rate on the compression hardness in the here for discussion standing area is small.

Geeignet für den ersten Schaumstoff sind Polypropylen-, Polystyrol- oder andere thermoplastische Kunststoffschaumstoffe, insbesondere halbharte Polyurethan­ schaumstoffe, wie sie im Handbook of Polyurethanes beschrieben sind.Polypropylene, polystyrene or others are suitable for the first foam thermoplastic foams, especially semi-rigid polyurethane foams as described in the Handbook of Polyurethanes.

Für das zweite deformierbare Mittel geeignete Schaumstoffe sind Polyurethanhart­ schaumstoffe, Polyisocyanurathartschaumstoffe oder polyurethanhaltige Polyiso­ cyanurathartschaumstoffe, die als EA-Schaumstoffe (EA = energieabsorbierend) Eingang in die Technik gefunden haben, wie sie z. B. in den US-A 4 866 102 und US-A 5 232 957 beschrieben sind.Foams suitable for the second deformable agent are rigid polyurethane foams, rigid polyisocyanurate foams or polyiso containing polyurethane rigid cyanurate foams that are used as EA foams (EA = energy absorbing) Have found their way into technology, such as B. in US-A 4 866 102 and US-A 5 232 957.

Die Erfindung wird nachfolgend anhand der beigefügten Figuren näher erläutert.The invention is explained below with reference to the accompanying figures.

Die Bezugszeichen in den Figuren bezeichnen im einzelnen:The reference symbols in the figures denote in detail:

A den oder die Längsträger eines Kraftfahrzeugchassis
B den Querträger eines Kraftfahrzeugchassis
D die Stoßfängerverkleidung
I das erste deformierbare Mittel
II das zweite deformierbare Mittel.A the or the side members of a motor vehicle chassis
B the cross member of a motor vehicle chassis
D the bumper trim
I the first deformable agent
II the second deformable agent.

Fig. 1 zeigt schematisch den Aufbau eines erfindungsgemäßen Stoßfängers mit einem mechanischen Dämpfungsmodul I und einem Schaumstoff II, die zwischen Querträger B des Kfz-Chassis und der Stoßfängerverkleidung D angeordnet sind. Fig. 1 shows schematically the structure of a bumper according to the invention with a mechanical damping module I and a foam II, which are arranged between the cross member B of the motor vehicle chassis and the bumper trim D.

Fig. 2 zeigt eine alternative Ausführungsform der Erfindung, bei der als erstes deformierbares Mittel hydraulische Stoßdämpfer I eingesetzt sind. Im Falle eines Frontalaufpralls wird die Stoßenergie zunächst von der Stoßfängerverkleidung D über den Schaumstoff II und den Querträger B auf die hydraulischen Stoßfänger I übertragen. Fig. 2 shows an alternative embodiment of the invention, are used in the first deformable means hydraulic shock absorbers I. In the event of a frontal impact, the impact energy is first transferred from the bumper trim D via the foam II and the cross member B to the hydraulic bumper I.

Die hydraulischen Stoßfänger I sind so ausgelegt, daß sie eine Stoßenergie, die einem Aufprall mit einer Geschwindigkeit von mindestens bis 4 km/h absorbieren können. Aufgrund der Stauchhärte des Schaumstoffs II wird dieser noch nicht energieabsorbierend deformiert. Bei höheren Aufprallgeschwindigkeiten wird auch der Schaumstoff II deformiert. Dabei wird dieser erfindungsgemäß so bemessen, daß eine Stoßenergie, die einem Aufprall von mindestens 8 km/h entspricht, absorbiert werden kann, ohne daß die Längsträger A zerstört werden.The hydraulic bumpers I are designed so that they have an impact energy absorb an impact at a speed of at least 4 km / h can. Due to the compression hardness of the foam II, this is not yet deformed to absorb energy. At higher impact speeds, too the foam II deformed. According to the invention, this is dimensioned so that that an impact energy that corresponds to an impact of at least 8 km / h, can be absorbed without the longitudinal beams A being destroyed.

Fig. 3 bis 5 zeigen bevorzugte Ausführungsformen der Erfindungen, bei denen auch als erstes deformierbares Mittel ein Schaumstoff I eingesetzt wird. Fig. 3 to 5 show preferred embodiments of the inventions, in which used as a first deformable means is a foam I.

Fig. 6 zeigt die Stauchung/Spannungs-(Stauchhärte-)Charakteristik zweier erfindungsgemäß geeigneter Schaumstoffe I und II. Die Werte wurden bei einer Stauchgeschwindigkeit von 500 mm/min (quasistatisch) ermittelt. Fig. 6, the compression / voltage (Stauchhärte-) shows two characteristic according to the invention suitable foams I and II. The values were determined at a compression speed of 500 mm / min (quasi-statically).

Fig. 7 zeigt die Verzögerungscharakteristik Fig. 7 shows the delay characteristic

eines erfindungsge­ mäßen Stoßfängers, bei dem ein Schaumstoff I gemäß Fig. 6 mit einer Abmessung von 50×200×150 mm³ und ein Schaumstoff II gemäß Fig. 6 mit einer Abmessung von 200×200×1500 mm³ eingesetzt wurden. Dargestellt ist die Verzögerung in Abhängigkeit vom Verzögerungsweg für den Aufprall einer Masse von 1t mit unterschiedlicher Geschwindigkeit. Die Pfeile geben den Verzögerungsweg bei einem Aufprall mit 1 m/s (3,6 km/h) bzw. 4 m/s (14,4 km/h) an.of a bumper according to the invention, in which a foam I according to FIG. 6 with a dimension of 50 × 200 × 150 mm³ and a foam II according to FIG. 6 with a dimension of 200 × 200 × 1500 mm³ were used. The deceleration is shown depending on the deceleration distance for the impact of a mass of 1t at different speeds. The arrows indicate the deceleration distance in the event of an impact at 1 m / s (3.6 km / h) or 4 m / s (14.4 km / h).

Claims (5)

1. Stoßfänger auf Basis energieabsorbierender Schaumstoffe enthaltend
  • - erste energieabsorbierend reversibel deformierbare Mittel einer ersten Stauchhärte, und
  • - zweite energieabsorbierend deformierbare Mittel bestehend aus Schaumstoff mit einer zweiten größeren Stauchhärte mit einem Verhältnis der Stauchhärten bei 50% Stauchung und bei 10% Stauchung von höchstens 1,5.
1. Containing bumpers based on energy-absorbing foams
  • - first energy absorbing reversibly deformable means of a first compression hardness, and
  • - second energy absorbing deformable means consisting of foam with a second greater compression hardness with a ratio of compression hardness at 50% compression and at 10% compression of at most 1.5.
2. Stoßfänger nach Anspruch 1, wobei das erste Mittel eine erste Stoßenergie unter Stauchung zumindest zeitweise absorbieren kann, wobei der Schaumstoff (zweites deformierbares Mittel) um nicht mehr als 10% gestaucht wird.2. The bumper of claim 1, wherein the first means a first impact energy can absorb at least temporarily under compression, the Foam (second deformable agent) by no more than 10% is compressed. 3. Stoßfänger nach Anspruch 1 oder 2, wobei das deformierbare Volumen des Schaumstoffs so bemessen ist, daß eine zweite Stoßenergie unter Stauchung des Schaumstoffs um nicht mehr als 60% absorbiert werden kann.3. A bumper according to claim 1 or 2, wherein the deformable volume of Foam is dimensioned so that a second impact energy under compression of the foam cannot be absorbed by more than 60%. 4. Stoßfänger nach einem der Ansprüche 1 bis 3, wobei das erste Mittel ein Schaumstoff mit einem Verhältnis der Stauchhärten bei 50% Stauchung und bei 10% Stauchung von 2 bis 3 ist, und die Stauchhärte im Vergleich zum zweiten Schaumstoff (zweites deformierbares Mittel) mindestens im Bereich der Stauchung von jeweils bis 50% kleiner ist.4. Bumper according to one of claims 1 to 3, wherein the first means Foam with a ratio of compression hardness at 50% compression and at 10% compression is from 2 to 3, and the compression hardness in comparison to the second foam (second deformable agent) at least in The range of compression is up to 50% smaller. 5. Stoßfänger nach Anspruch 4, wobei das Volumen des ersten Schaumstoffs so bemessen ist, daß eine erste Stoßenergie unter Stauchung dieses ersten Schaumstoffs um nicht mehr als 50% zumindest zeitweise absorbiert werden kann, wobei der zweite Schaumstoff um nicht mehr als 10% gestaucht wird.5. The bumper of claim 4, wherein the volume of the first foam is so dimensioned that a first impact energy while compressing this first Foam absorbed by no more than 50% at least temporarily the second foam by no more than 10% is compressed.
DE4432082A 1994-09-09 1994-09-09 Safety bumper for cars, Withdrawn DE4432082A1 (en)

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DE4432082A DE4432082A1 (en) 1994-09-09 1994-09-09 Safety bumper for cars,

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
WO1998023467A1 (en) * 1996-11-26 1998-06-04 Gefinex Gesellschaft für innovative Extrusionsprodukte mbH Bumper
WO1999000236A1 (en) * 1997-06-27 1999-01-07 The Dow Chemical Company Energy absorbing articles of extruded thermoplastic foams
DE19810871A1 (en) * 1998-03-13 1999-09-16 Dynamit Nobel Kunststoff Gmbh Energy absorbing foam structure, e.g. for use in motor vehicles
DE10002724A1 (en) * 2000-01-22 2001-08-02 Bayerische Motoren Werke Ag Vehicle with bumper has plastic foam and at least one deformation element located between outer skin of bumper and one end of respective longitudinal support
EP2204303A1 (en) * 2004-10-29 2010-07-07 Sodikart Kart equipped with a protection assembly comprising a sliding side element, a side element and corresponding protection assembly
DE102009015182A1 (en) * 2009-03-31 2010-10-14 Benteler Automobiltechnik Gmbh Bumper arrangement for a motor vehicle
DE102012012060A1 (en) 2012-06-19 2013-12-19 Institut Für Verbundwerkstoffe Gmbh Deformation element for absorption of kinetic harming energy in e.g. front carriage of motor car, has longitudinal section cooperating with baffle plate, where predeformation is applied on element by activation of actuator
GB2510686A (en) * 2013-12-11 2014-08-13 Daimler Ag An energy absorption device for a vehicle
DE102019108742A1 (en) * 2019-04-03 2020-10-08 Bayerische Motoren Werke Aktiengesellschaft Energy absorption device
DE102015110675B4 (en) 2015-07-02 2021-10-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Energy absorption element for a bumper of a motor vehicle, method for producing an energy absorption element and bumper with at least one energy absorption element

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DE3447424A1 (en) * 1983-12-30 1985-07-11 Ladney, Michael, Sterling Heights, Mich. VEHICLE BUMPER
US4866102A (en) * 1987-11-20 1989-09-12 Pray Edward R Moldable energy absorbing rigid polyurethane foams
US5232957A (en) * 1992-09-11 1993-08-03 Davidson Textron Inc. RIM molded energy absorbing polyurethane foam

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DE1248286B (en) * 1963-04-27 1967-08-24 Continental Gummi Werke Ag Process for the production of open-cell, flexible foams from polyurethanes
DE3447424A1 (en) * 1983-12-30 1985-07-11 Ladney, Michael, Sterling Heights, Mich. VEHICLE BUMPER
US4866102A (en) * 1987-11-20 1989-09-12 Pray Edward R Moldable energy absorbing rigid polyurethane foams
US5232957A (en) * 1992-09-11 1993-08-03 Davidson Textron Inc. RIM molded energy absorbing polyurethane foam

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KRAMER, Martin: Stoßstangen aus der Retorte? In: Automobil-Industrie 1973, Nr. 2, S. 45-53 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998023467A1 (en) * 1996-11-26 1998-06-04 Gefinex Gesellschaft für innovative Extrusionsprodukte mbH Bumper
WO1999000236A1 (en) * 1997-06-27 1999-01-07 The Dow Chemical Company Energy absorbing articles of extruded thermoplastic foams
DE19810871A1 (en) * 1998-03-13 1999-09-16 Dynamit Nobel Kunststoff Gmbh Energy absorbing foam structure, e.g. for use in motor vehicles
EP0947727A1 (en) * 1998-03-13 1999-10-06 Dynamit Nobel Kunststoff GmbH Energy absorbing foam structure
DE10002724A1 (en) * 2000-01-22 2001-08-02 Bayerische Motoren Werke Ag Vehicle with bumper has plastic foam and at least one deformation element located between outer skin of bumper and one end of respective longitudinal support
DE10002724C2 (en) * 2000-01-22 2001-12-06 Bayerische Motoren Werke Ag Vehicle with a bumper
EP2204303A1 (en) * 2004-10-29 2010-07-07 Sodikart Kart equipped with a protection assembly comprising a sliding side element, a side element and corresponding protection assembly
US8141917B2 (en) 2009-03-31 2012-03-27 Benteler Automobiltechnik Gmbh Energy absorption impact system for motor vehicles
DE102009015182A1 (en) * 2009-03-31 2010-10-14 Benteler Automobiltechnik Gmbh Bumper arrangement for a motor vehicle
DE102009015182B4 (en) * 2009-03-31 2014-05-28 Benteler Automobiltechnik Gmbh Bumper arrangement for a motor vehicle
DE102012012060A1 (en) 2012-06-19 2013-12-19 Institut Für Verbundwerkstoffe Gmbh Deformation element for absorption of kinetic harming energy in e.g. front carriage of motor car, has longitudinal section cooperating with baffle plate, where predeformation is applied on element by activation of actuator
DE102012012060B4 (en) * 2012-06-19 2020-09-03 Institut Für Verbundwerkstoffe Gmbh Deformation element to absorb the kinetic damage energy that occurs in a crash
GB2510686A (en) * 2013-12-11 2014-08-13 Daimler Ag An energy absorption device for a vehicle
DE102015110675B4 (en) 2015-07-02 2021-10-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Energy absorption element for a bumper of a motor vehicle, method for producing an energy absorption element and bumper with at least one energy absorption element
DE102019108742A1 (en) * 2019-04-03 2020-10-08 Bayerische Motoren Werke Aktiengesellschaft Energy absorption device
US11945385B2 (en) 2019-04-03 2024-04-02 Bayerische Motoren Werke Aktiengesellschaft Energy absorption device

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