WO2009121446A1 - Traverse à profil d'écoulement optimisé - Google Patents

Traverse à profil d'écoulement optimisé Download PDF

Info

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
Authority
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)
English (en)
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/fr

Links

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.

Landscapes

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

Abstract

L'invention concerne une traverse (10), en particulier une traverse avant pour châssis d'un véhicule utilitaire, comprenant un corps de base (12) s'étendant dans une zone comprise entre les longerons du châssis, caractérisé en ce que le corps de base (12) présente, au moins partiellement, un profil (18) de section de forme aérodynamique, en particulier en forme générale de goutte ou d'aile portante.
PCT/EP2009/000528 2008-03-29 2009-01-28 Traverse à profil d'écoulement optimisé WO2009121446A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008016381.3A DE102008016381B4 (de) 2008-03-29 2008-03-29 Strömungsoptimierter Querträger
DE102008016381.3 2008-03-29

Publications (1)

Publication Number Publication Date
WO2009121446A1 true WO2009121446A1 (fr) 2009-10-08

Family

ID=40524532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/000528 WO2009121446A1 (fr) 2008-03-29 2009-01-28 Traverse à profil d'écoulement optimisé

Country Status (2)

Country Link
DE (1) DE102008016381B4 (fr)
WO (1) WO2009121446A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2952342A1 (fr) * 2009-11-12 2011-05-13 Faurecia Bloc Avant Poutre transversale avant de vehicule automobile comprenant un element de carenage arriere
FR3058094A1 (fr) * 2016-10-28 2018-05-04 Renault S.A.S Element de support d'equipements d'une suspension pneumatique d'un vehicule
EP3941802A4 (fr) * 2019-06-19 2022-03-30 Volvo Truck Corporation Traverse de fermeture avant aérodynamique pour véhicule routier

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011106250A1 (de) 2011-07-01 2013-01-03 Audi Ag Hilfsrahmen für das Fahrzeugchassis von Kraftfahrzeugen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1510443A1 (fr) * 2003-08-25 2005-03-02 Peugeot Citroen Automobiles S.A. Vèhicule automobile à crèmaillère de direction intègrèe dans la traverse avant
US20050062251A1 (en) * 2003-09-22 2005-03-24 Ramsey John E. Vehicle frame having air tank cross member
DE102005029292A1 (de) * 2005-04-13 2006-10-19 Audi Ag Hilfsrahmen für ein Kraftfahrzeug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10139268A1 (de) * 2001-08-09 2003-02-20 Porsche Ag Trägerstruktur, insbesondere für Fahrzeugkarosserien
DE102004036071A1 (de) * 2004-07-24 2006-02-16 Dr.Ing.H.C. F. Porsche Ag Rahmenstruktur für Aufbauten von Kraftfahrzeugen
DE102006040073A1 (de) * 2006-08-26 2008-02-28 Daimler Ag Hohlträger und ein Verfahren zur Herstellung desselben

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1510443A1 (fr) * 2003-08-25 2005-03-02 Peugeot Citroen Automobiles S.A. Vèhicule automobile à crèmaillère de direction intègrèe dans la traverse avant
US20050062251A1 (en) * 2003-09-22 2005-03-24 Ramsey John E. Vehicle frame having air tank cross member
DE102005029292A1 (de) * 2005-04-13 2006-10-19 Audi Ag Hilfsrahmen für ein Kraftfahrzeug

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2952342A1 (fr) * 2009-11-12 2011-05-13 Faurecia Bloc Avant Poutre transversale avant de vehicule automobile comprenant un element de carenage arriere
EP2322413A1 (fr) * 2009-11-12 2011-05-18 Faurecia Bloc Avant Poutre transversale avant de véhicule automobile comprenant un élément de carénage arrière
US8474900B2 (en) 2009-11-12 2013-07-02 Faurecia Bloc Avant Motor vehicle front transverse beam comprising a rear fairing element
FR3058094A1 (fr) * 2016-10-28 2018-05-04 Renault S.A.S Element de support d'equipements d'une suspension pneumatique d'un vehicule
EP3941802A4 (fr) * 2019-06-19 2022-03-30 Volvo Truck Corporation Traverse de fermeture avant aérodynamique pour véhicule routier
US20220176807A1 (en) * 2019-06-19 2022-06-09 Volvo Truck Corporation Aerodynamic front closing cross-member for road vehicle

Also Published As

Publication number Publication date
DE102008016381B4 (de) 2015-01-08
DE102008016381A1 (de) 2010-01-14

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