WO2009121446A1 - Flow-optimized crossbar - Google Patents

Flow-optimized crossbar Download PDF

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Publication number
WO2009121446A1
WO2009121446A1 PCT/EP2009/000528 EP2009000528W WO2009121446A1 WO 2009121446 A1 WO2009121446 A1 WO 2009121446A1 EP 2009000528 W EP2009000528 W EP 2009000528W WO 2009121446 A1 WO2009121446 A1 WO 2009121446A1
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WO
WIPO (PCT)
Prior art keywords
cross member
base body
vehicle
profile
compressed air
Prior art date
Application number
PCT/EP2009/000528
Other languages
German (de)
French (fr)
Inventor
Mario List
Original Assignee
Daimler 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 Daimler Ag filed Critical Daimler Ag
Publication of WO2009121446A1 publication Critical patent/WO2009121446A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D35/00—Vehicle bodies characterised by streamlining
    • B62D35/005—Front spoilers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/82—Elements for improving aerodynamics

Definitions

  • the invention relates to a flow-optimized cross member for a chassis of a commercial vehicle according to the preamble of patent claim 1.
  • vehicle bodies are generally designed as non-self-supporting bodies.
  • the vehicle body and other chassis groups are mounted on a frame, which is usually designed as a ladder frame.
  • a frame which is usually designed as a ladder frame.
  • two longitudinal members running in the vehicle longitudinal direction are connected to one another via a plurality of cross members.
  • Such cross members are known in the art as generally known.
  • the attached at the front of the vehicle front cross member which is directly impinged by the wind during driving of the vehicle caused in the usual design a turbulence of this air flow.
  • This disadvantageously increases the flow resistance coefficient C w of the vehicle, thereby leading to uneconomically increased fuel consumption.
  • turbulence formation in particular at the front cross member, reduces airflow directed at components mounted behind the cross member in the longitudinal direction of the vehicle, in particular the air flow onto the cooling water radiator of the engine cooling system and the engine compartment in general.
  • the cooling capacity of the engine cooling system is reduced, which is why costly measures to act on the cooling water cooler with additional air must be taken.
  • the present invention is therefore an object of the invention to provide a flow-optimized cross member, are avoided by the turbulence and a disadvantageous air flow when driving the vehicle.
  • Such a cross member consists of a base body which extends in the vehicle transverse direction, and which is provided in its end regions with mounting flanges, via which an attachment of the cross member to the longitudinal member of the vehicle frame.
  • the cross-sectional profile of the base body is streamlined, in particular teardrop or airfoil-shaped, with the tapered end of the profile facing the vehicle rear in the vehicle longitudinal direction.
  • the main body of the cross member is formed as an aluminum extruded profile. This allows a cost-effective production and combines low weight with a high mechanical stability.
  • the base body is further formed as a hollow profile, wherein the terminal mounting flanges complete the inner cavity of the profile.
  • compressed air can be supplied to a base body designed as a hollow profile via a first opening. Furthermore, a second opening on the base body is provided, via which compressed air can be removed.
  • a dual function of the cross member as a mechanical support element and as a compressed air reservoir for compressed air operated systems of the motor vehicle leads to a further weight and space savings.
  • no separate, space-consuming compressed air storage for example for a cab air suspension, must be provided.
  • Fig. 1 is a perspective view of a cross member according to the invention.
  • Fig. 2 shows a schematic representation, shown in longitudinal section, of the arrangement of such a cross member in relation to other assemblies of the motor vehicle.
  • a designated as a whole with 10 front cross member for a motor vehicle consists of a base body 12 and two arranged at the ends of this body mounting flanges 14. About the mounting flanges 14 of the cross member with the longitudinal members of the chassis can be connected. In the illustrated case, recesses 16 are provided in the flanges 14 for the realization of this connection, via which the cross member can be screwed to the longitudinal member.
  • other joining methods for fixing the cross member 10 to the longitudinal beams are conceivable, in particular welding or riveting.
  • the main body 12 has a streamlined profile 18 in cross-section, wherein the tapered end 20 of this profile is directed in the direction of the vehicle longitudinal axis 22 to the rear end of the vehicle. When driving the motor vehicle, this profile is flown in the direction of arrow 24 from the wind.
  • the teardrop-shaped configuration of the base body allows a largely laminar flow around the cross member 10.
  • the cooling water cooler 26 of the engine cooling system of the motor vehicle flows unhindered through the wind when using a front cross member according to the invention and thus provides an improved cooling performance compared to an arrangement of the radiator behind a conventional front cross member.
  • the air flow into the engine compartment 28 is largely unhindered in this arrangement and allows more efficient cooling of components located in the engine compartment 28.
  • the main body 12 of the cross member 10 can be particularly easy to manufacture as an extruded profile of an aluminum alloy.
  • the base body 12 is designed as a hollow profile, wherein the wall 30 of the profile encloses an inner space 32.
  • the interior 32 is further closed at the ends of the body by the mounting flanges 14.
  • the base body 12 can be made of other materials such as magnesium alloys or steel and also be prepared by other methods.
  • the design of the body 12 as a hollow profile also allows further use of the cross member 10 as a compressed air reservoir.
  • compressed air brakes pneumatic suspension, u.a. for a cab air suspension, and compressed air systems for building the system pressure in cooling systems called.
  • compressed air storage In addition to pressure generators such systems require compressed air storage in order to provide compressed air as needed quickly available.
  • the integration of such compressed air storage in other components allows a particularly space-saving and easy construction of such systems.
  • a filling nozzle 38 which communicates via a first opening 34 with the interior 32 of the body 12 in conjunction, and a removal nozzle 40, which via a second opening 36 also with the Interior 32 of the body 12 is in communication, provided.
  • a pressure generator of a compressed air system not shown here, via the nozzle 40, the compressed air stored in the interior 32 of the body 12 can be removed again through the opening 36 and fed to the consumer also not shown such a compressed air system.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention relates to a crossbar (10), particularly front crossbar, for a vehicle frame of a commercial vehicle, having a base body (12) extending in the region between longitudinal frame beams of the vehicle frame, wherein the base body (12) comprises a profile (18) having a streamlined, particularly droplet or airfoil-shaped cross section at least in segments.

Description

Strömungsoptimierter Querträger Flow-optimized cross member
Die Erfindung betrifft einen strömungsoptimierten Querträger für ein Fahrgestell eines Nutzfahrzeugs nach dem Oberbegriff von Patentanspruch 1.The invention relates to a flow-optimized cross member for a chassis of a commercial vehicle according to the preamble of patent claim 1.
Karosserien für Nutzfahrzeuge werden im Allgemeinen als nicht selbsttragende Karosserien ausgelegt. Der Fahrzeugaufbau sowie weitere Fahrwerksgruppen werden dabei auf einen Rahmen montiert, welcher in der Regel als Leiterrahmen ausgebildet ist. Hierbei sind zwei in Fahrzeuglängsrichtung verlaufende Längsträger über mehrere Querträger miteinander verbunden.Commercial vehicle bodies are generally designed as non-self-supporting bodies. The vehicle body and other chassis groups are mounted on a frame, which is usually designed as a ladder frame. In this case, two longitudinal members running in the vehicle longitudinal direction are connected to one another via a plurality of cross members.
Solche Querträger sind dem Stand der Technik als allgemein bekannt zu entnehmen.Such cross members are known in the art as generally known.
Während gängige als Rund-, Rechteck- oder U-Profil ausgeführte Querträger zwar vorteilhaft eine hohe Biegesteifigkeit, Verwindungselastizität und Tragkraft des Rahmens sicherstellen, ist diese Bauweise dennoch mit Nachteilen behaftet.While common designed as a round, rectangular or U-shaped cross member while advantageously ensure high bending stiffness, torsional elasticity and strength of the frame, this construction is still subject to disadvantages.
Insbesondere der an der Fahrzeugfront angebrachte Frontquerträger, welcher im Fahrbetrieb des Fahrzeuges direkt vom Fahrtwind angeströmt wird, verursacht in der gängigen Bauweise eine Verwirbelung dieses Luftstroms. Dies erhöht auf nachteilige Weise den Strömungswiderstandskoeffizienten Cw des Fahrzeugs und führt dadurch zu einem unökonomisch erhöhten Kraftstoffverbrauch. Weiterhin reduziert eine solche Turbulenzbildung insbesondere am Frontquerträger auf in Längsrichtung des Fahrzeugs hinter dem Querträger angebrachte Komponenten gerichteten Luftstrom, insbesondere den Luftstrom auf den Kühlwasserkühler des Motorkühlsystems und den Motorraum im Allgemeinen. Dadurch wird die Kühlleistung des Motorkühlsystems verringert, weswegen aufwändige Maßnahmen zur Beaufschlagung des Kühlwasserkühlers mit zusätzlicher Luft ergriffen werden müssen. Der vorliegenden Erfindung liegt also die Aufgabe zugrunde, einen strömungsoptimierten Querträger bereitzustellen, durch den Turbulenzbildungen und eine nachteilige Luftführung im Fahrbetrieb des Fahrzeugs vermieden werden.In particular, the attached at the front of the vehicle front cross member, which is directly impinged by the wind during driving of the vehicle caused in the usual design a turbulence of this air flow. This disadvantageously increases the flow resistance coefficient C w of the vehicle, thereby leading to uneconomically increased fuel consumption. Furthermore, such turbulence formation, in particular at the front cross member, reduces airflow directed at components mounted behind the cross member in the longitudinal direction of the vehicle, in particular the air flow onto the cooling water radiator of the engine cooling system and the engine compartment in general. As a result, the cooling capacity of the engine cooling system is reduced, which is why costly measures to act on the cooling water cooler with additional air must be taken. The present invention is therefore an object of the invention to provide a flow-optimized cross member, are avoided by the turbulence and a disadvantageous air flow when driving the vehicle.
Diese Aufgabe wird gelöst durch einen Querträger mit den Merkmalen des Patentanspruchs 1.This object is achieved by a cross member having the features of patent claim 1.
Ein solcher Querträger besteht aus einem Grundkörper, der sich in Fahrzeugquerrichtung erstreckt, und der in seinen Endbereichen mit Befestigungsflanschen versehen ist, über welche eine Befestigung des Querträgers an den Längsträger des Fahrzeugrahmens erfolgt.Such a cross member consists of a base body which extends in the vehicle transverse direction, and which is provided in its end regions with mounting flanges, via which an attachment of the cross member to the longitudinal member of the vehicle frame.
In der erfindungsgemäßen Ausführung ist das Querschnittsprofil des Grundkörpers dabei stromlinienförmig, insbesondere tropfen- oder tragflächenförmig ausgebildet, wobei das sich verjüngende Ende des Profils in Fahrzeuglängsrichtung zur Fahrzeugrückseite weist. Dadurch wird vorteilhaft eine gleichmäßige weitgehend laminare Umströmung des Querträgers im Fahrbetrieb des Fahrzeugs sichergestellt und Turbulenzen vermieden.In the embodiment according to the invention, the cross-sectional profile of the base body is streamlined, in particular teardrop or airfoil-shaped, with the tapered end of the profile facing the vehicle rear in the vehicle longitudinal direction. As a result, it is advantageous to ensure a uniform, largely laminar flow around the cross member in the driving operation of the vehicle and to avoid turbulence.
In einer bevorzugten Ausführungsform ist der Grundkörper des Querträgers als Aluminiumstrangpressprofil ausgebildet. Dies ermöglicht eine kostengünstige Fertigung und verbindet geringes Gewicht mit einer hohen mechanischen Stabilität.In a preferred embodiment, the main body of the cross member is formed as an aluminum extruded profile. This allows a cost-effective production and combines low weight with a high mechanical stability.
In einer besonders bevorzugten Ausführungsform ist der Grundkörper weiterhin als Hohlprofil ausgebildet, wobei die endständigen Befestigungsflansche den inneren Hohlraum des Profils abschließen. Durch die Ausbildung des Grundkörpers als Hohlprofil kann weiteres Gewicht eingespart werden, ohne die mechanischen Eigenschaften des Querträgers nennenswert zu beeinträchtigen.In a particularly preferred embodiment, the base body is further formed as a hollow profile, wherein the terminal mounting flanges complete the inner cavity of the profile. By forming the body as a hollow profile further weight can be saved without significantly affecting the mechanical properties of the cross member.
In einer weiteren Ausführungsform eines erfindungsgemäßen Querträgers ist einem als Hohlprofil ausgebildeten Grundkörper über eine erste Öffnung Druckluft zuführbar. Weiterhin ist eine zweite Öffnung am Grundkörper vorgesehen, über welche Druckluft entnommen werden kann. Eine solche Doppelfunktion des Querträgers als mechanisches Stützelement und als Druckluftspeicher für druckluftbetriebene Systeme des Kraftfahrzeuges führt zu einer weiteren Gewichts- und Bauraumeinsparung. Insbesondere muss kein separater, Raum beanspruchender Druckluftspeicher, beispielsweise für eine Fahrerhausluftfederung, bereitgestellt werden. Im Folgenden soll die Erfindung anhand der Zeichnungen ohne Beschränkung der Allgemeinheit näher erläutert werden, wobeiIn a further embodiment of a cross member according to the invention, compressed air can be supplied to a base body designed as a hollow profile via a first opening. Furthermore, a second opening on the base body is provided, via which compressed air can be removed. Such a dual function of the cross member as a mechanical support element and as a compressed air reservoir for compressed air operated systems of the motor vehicle leads to a further weight and space savings. In particular, no separate, space-consuming compressed air storage, for example for a cab air suspension, must be provided. In the following, the invention will be explained in more detail with reference to the drawings without limiting the generality, wherein
Fig. 1 eine perspektivische Darstellung eines erfindungsgemäßen Querträgers undFig. 1 is a perspective view of a cross member according to the invention and
Fig. 2 eine im Längsschnitt gezeigte schematische Darstellung der Anordnung eines solchen Querträgers im Verhältnis zu anderen Baugruppen des Kraftfahrzeugs zeigt.Fig. 2 shows a schematic representation, shown in longitudinal section, of the arrangement of such a cross member in relation to other assemblies of the motor vehicle.
Ein im Ganzen mit 10 bezeichneter Frontquerträger für ein Kraftfahrzeug besteht aus einem Grundkörper 12 und zwei an den Enden dieses Grundkörpers angeordneten Befestigungsflanschen 14. Über die Befestigungsflansche 14 ist der Querträger mit den Längsträgern des Fahrgestells verbindbar. Im dargestellten Fall sind zur Realisierung dieser Verbindung Aussparungen 16 in den Flanschen 14 vorgesehen, über die der Querträger mit dem Längsträger verschraubt werden kann. Selbstverständlich sind auch andere Fügeverfahren zur Befestigung des Querträgers 10 an den Längsträgern denkbar, insbesondere Schweißen oder Nieten.A designated as a whole with 10 front cross member for a motor vehicle consists of a base body 12 and two arranged at the ends of this body mounting flanges 14. About the mounting flanges 14 of the cross member with the longitudinal members of the chassis can be connected. In the illustrated case, recesses 16 are provided in the flanges 14 for the realization of this connection, via which the cross member can be screwed to the longitudinal member. Of course, other joining methods for fixing the cross member 10 to the longitudinal beams are conceivable, in particular welding or riveting.
Der Grundkörper 12 weist im Querschnitt ein stromlinienförmiges Profil 18 auf, wobei das verjüngte Ende 20 dieses Profils in Richtung der Fahrzeuglängsachse 22 zum hinteren Ende des Fahrzeugs hin gerichtet ist. Im Fahrbetrieb des Kraftfahrzeugs wird dieses Profil in Richtung des Pfeils 24 vom Fahrtwind angeströmt. Die tropfenförmige Ausgestaltung des Grundkörpers ermöglicht dabei eine weitgehend laminare Umströmung des Querträgers 10.The main body 12 has a streamlined profile 18 in cross-section, wherein the tapered end 20 of this profile is directed in the direction of the vehicle longitudinal axis 22 to the rear end of the vehicle. When driving the motor vehicle, this profile is flown in the direction of arrow 24 from the wind. The teardrop-shaped configuration of the base body allows a largely laminar flow around the cross member 10.
Dadurch wird ein weitgehend ungehindertes Anströmen von in Fahrzeugrichtung hinter dem Frontquerträger gelegenen Komponenten ermöglicht, wie in Figur 2 gezeigt. Insbesondere wird der Kühlwasserkühler 26 des Motorkühlsystems des Kraftfahrzeugs bei der Verwendung eines erfindungsgemäßen Frontquerträgers ungehindert vom Fahrtwind durchströmt und erbringt somit eine verbesserte Kühlleistung im Vergleich zu einer Anordnung des Kühlers hinter einem konventionellen Frontquerträger. Auch der Luftstrom in den Motorraum 28 ist bei dieser Anordnung weitgehend ungehindert und ermöglicht eine effizientere Kühlung von im Motorraum 28 gelegenen Komponenten. Der Grundkörper 12 des Querträgers 10 lässt sich besonders einfach als Strangpressprofil bevorzugt aus einer Aluminiumlegierung fertigen. Idealerweise ist der Grundkörper 12 dabei als Hohlprofil ausgeführt, wobei die Wand 30 des Profils einen Innenraum 32 umschließt. Der Innenraum 32 ist an den Enden des Grundkörpers weiterhin durch die Befestigungsflansche 14 verschlossen. Selbstverständlich kann der Grundkörper 12 auch aus anderen Materialien wie beispielsweise Magnesiumlegierungen oder Stahl gefertigt werden und auch durch andere Verfahren hergestellt werden. So ist es z.B. vorstellbar den Grundkörper 12 als Gussbauteil auszulegen.As a result, a largely unhindered influx of components located behind the front cross member in the vehicle direction is made possible, as shown in FIG. In particular, the cooling water cooler 26 of the engine cooling system of the motor vehicle flows unhindered through the wind when using a front cross member according to the invention and thus provides an improved cooling performance compared to an arrangement of the radiator behind a conventional front cross member. The air flow into the engine compartment 28 is largely unhindered in this arrangement and allows more efficient cooling of components located in the engine compartment 28. The main body 12 of the cross member 10 can be particularly easy to manufacture as an extruded profile of an aluminum alloy. Ideally, the base body 12 is designed as a hollow profile, wherein the wall 30 of the profile encloses an inner space 32. The interior 32 is further closed at the ends of the body by the mounting flanges 14. Of course, the base body 12 can be made of other materials such as magnesium alloys or steel and also be prepared by other methods. For example, it is conceivable to design the main body 12 as a cast component.
Die Auslegung des Grundkörpers 12 als Hohlprofil ermöglicht zudem eine weitere Verwendung des Querträgers 10 als Druckluftspeicher. Eine Vielzahl von Systemen in modernen Nutzfahrzeugen werden mit Druckluft betrieben, es seien hier exemplarisch lediglich Druckluftbremsen, Druckluftfederungen, u.a. für eine Fahrerhausluftfederung, und Druckluftsysteme zum Aufbau des Systemdrucks in Kühlsystemen genannt. Neben Druckerzeugern benötigen solche Systeme Druckluftspeicher, um komprimierte Luft bedarfsgerecht schnell zur Verfügung stellen zu können. Die Integration solcher Druckluftspeicher in andere Bauteile ermöglicht einen besonders platzsparenden und leichten Aufbau solcher Systeme.The design of the body 12 as a hollow profile also allows further use of the cross member 10 as a compressed air reservoir. A variety of systems in modern commercial vehicles are operated with compressed air, here are only examples of compressed air brakes, pneumatic suspension, u.a. for a cab air suspension, and compressed air systems for building the system pressure in cooling systems called. In addition to pressure generators such systems require compressed air storage in order to provide compressed air as needed quickly available. The integration of such compressed air storage in other components allows a particularly space-saving and easy construction of such systems.
Um einen erfindungsgemäßen Querträger auch als Druckluftspeicher nutzen zu können, sind am Grundkörper 12 ein Befüllstutzen 38, welcher über eine erste Öffnung 34 mit dem Innenraum 32 des Grundkörpers 12 in Verbindung steht, sowie ein Entnahmestutzen 40, welcher über eine zweite Öffnung 36 ebenfalls mit dem Innenraum 32 des Grundkörpers 12 in Verbindung steht, vorgesehen. Über den Stutzen 38 erfolgt die Anbindung an einen hier nicht gezeigten Druckerzeuger eines Druckluftsystems, über den Stutzen 40 kann die im Innenraum 32 des Grundkörpers 12 gespeicherte Druckluft durch die Öffnung 36 wieder entnommen und den ebenfalls nicht gezeigten Verbrauchern eines solchen Druckluftsystems zugeführt werden. In order to use a cross member according to the invention as a compressed air reservoir, are on the main body 12 a filling nozzle 38, which communicates via a first opening 34 with the interior 32 of the body 12 in conjunction, and a removal nozzle 40, which via a second opening 36 also with the Interior 32 of the body 12 is in communication, provided. About the nozzle 38, the connection is made to a pressure generator of a compressed air system, not shown here, via the nozzle 40, the compressed air stored in the interior 32 of the body 12 can be removed again through the opening 36 and fed to the consumer also not shown such a compressed air system.

Claims

Patentansprüche claims
1. Querträger (10), insbesondere Frontquerträger, für einen Fahrzeugrahmen eines Nutzfahrzeugs, mit einem sich im Bereich zwischen Rahmenlängsträgern des Fahrzeugrahmens erstreckenden Grundkörper (12), dadurch gekennzeichnet, dass der Grundkörper (12) zumindest bereichsweise ein im Querschnitt stromlinienförmiges, insbesondere tropfen- oder tragflächenförmiges Profil (18) aufweist.1. Cross member (10), in particular front cross member, for a vehicle frame of a utility vehicle, extending in the region between frame side members of the vehicle frame body (12), characterized in that the base body (12) at least partially a streamlined in cross-section, in particular drop- or wing-shaped profile (18).
2. Querträger (10) nach Anspruch 1 , dadurch gekennzeichnet, dass der Grundkörper (12) als Aluminiumstrangpressprofil ausgebildet ist.2. Cross member (10) according to claim 1, characterized in that the base body (12) is designed as an aluminum extruded profile.
3. Querträger (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Grundkörper (12) als Hohlprofil mit einem Hohlraum (32) ausgebildet ist, wobei Befestigungsflansche (14) den innenliegenden Hohlraum (32) an den Enden des Profils abschließen.3. Cross member (10) according to any one of the preceding claims, characterized in that the base body (12) is designed as a hollow profile with a cavity (32), said mounting flanges (14) complete the inner cavity (32) at the ends of the profile.
4. Querträger (10) nach Anspruch 3, dadurch gekennzeichnet, dass dem innenliegenden Hohlraum (32) des Grundkörpers (12) über eine erste Öffnung (34) Druckluft zuführbar ist und über eine zweite Öffnung (36) Druckluft aus dem innenliegenden Hohlraum (32) des Grundkörpers (12) entnehmbar ist. 4. Cross member (10) according to claim 3, characterized in that the inner cavity (32) of the base body (12) via a first opening (34) compressed air can be supplied and via a second opening (36) compressed air from the inner cavity (32 ) of the base body (12) can be removed.
PCT/EP2009/000528 2008-03-29 2009-01-28 Flow-optimized crossbar WO2009121446A1 (en)

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FR2952342A1 (en) * 2009-11-12 2011-05-13 Faurecia Bloc Avant FRONT TRANSVERSAL BEAM FOR A MOTOR VEHICLE COMPRISING A REAR FAIRING ELEMENT
EP2322413A1 (en) * 2009-11-12 2011-05-18 Faurecia Bloc Avant Front crossbeam of an automobile including a rear fairing element
US8474900B2 (en) 2009-11-12 2013-07-02 Faurecia Bloc Avant Motor vehicle front transverse beam comprising a rear fairing element
FR3058094A1 (en) * 2016-10-28 2018-05-04 Renault S.A.S ELEMENT FOR SUPPORTING EQUIPMENT OF A PNEUMATIC SUSPENSION OF A VEHICLE
EP3941802A4 (en) * 2019-06-19 2022-03-30 Volvo Truck Corporation Aerodynamic front closing cross-member for road vehicle
US20220176807A1 (en) * 2019-06-19 2022-06-09 Volvo Truck Corporation Aerodynamic front closing cross-member for road vehicle
US12017523B2 (en) 2019-06-19 2024-06-25 Volvo Truck Corporation Aerodynamic front closing cross-member for road vehicle

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