EP1552123A1 - Air duct in the front part of a motor vehicle - Google Patents

Air duct in the front part of a motor vehicle

Info

Publication number
EP1552123A1
EP1552123A1 EP03750573A EP03750573A EP1552123A1 EP 1552123 A1 EP1552123 A1 EP 1552123A1 EP 03750573 A EP03750573 A EP 03750573A EP 03750573 A EP03750573 A EP 03750573A EP 1552123 A1 EP1552123 A1 EP 1552123A1
Authority
EP
European Patent Office
Prior art keywords
air duct
air
molded part
duct according
openings
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Withdrawn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
EP03750573A
Other languages
German (de)
French (fr)
Inventor
Dirk Becker
Patrick HÖFER
Martin Konermann
Ulrich Paetzold
Sascha Rabensdorf
Jurgen Schreiber
Czeslaw Zolich
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1552123A1 publication Critical patent/EP1552123A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/08—Air inlets for cooling; Shutters or blinds therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/082—Engine compartments
    • B62D25/084—Radiator supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers

Definitions

  • the invention relates to an air duct in the stem of a motor vehicle according to the preamble of patent claim 1.
  • an air duct in the stem of a motor vehicle is known. Recesses are made in a front wall that delimits the stem, through which cooling air flows into an engine compartment located behind the front wall. Air guiding channels are provided in the engine compartment, which supply the cooling air to the units to be cooled and which are formed by boundary walls running approximately parallel to the air flow direction.
  • boundary walls are formed by metal sheets of the body-in-white, they have to be sealed to one another and to the outside in order to avoid leakage losses and backflows. This requires increased effort in assembly.
  • Recesses are made in a front wall delimiting the stem, through which cooling air can flow into an engine compartment.
  • the inflowing air is directed through air ducts adjoining the cutouts to the units to be cooled in the engine compartment.
  • the air guiding channels are formed by boundary walls integrated in a molded part, the molded part extending approximately transversely to the air flow direction. It is thus possible to align the boundary walls on the molded part in such a way that both a tight connection to the cutouts and to the units arranged in the engine compartment is possible.
  • the molded part can be pivoted into the stem together with a cooling module as a preassembled unit, without additional sealing of the air guide channels to the outside or to one another being necessary.
  • the molded part can have through openings at least partially in the overlap region of the cutouts.
  • the boundary walls can extend as far as the cutouts in the front wall and rest on the edge regions of the cutout. This means that the inflowing air can no longer be deflected or swirled by protruding projections.
  • the boundary walls protrude approximately at right angles from the edge regions delimiting the passage openings. Sealing lips are attached or molded all around at the free ends of the boundary walls, so that the passage openings can be almost completely sealed off from adjacent body areas. Unwanted cross currents or eddies can thus be prevented in a simple form.
  • the molded part can be arranged as far as possible behind a bumper unit and thus serve as a connecting element between the bumper arrangement and the cooling module.
  • the form Part with such an arrangement requires no additional fastening measures.
  • a preferred embodiment consists in that the molded part has a large, upper passage opening above the bending beam belonging to the bumper unit.
  • Such an upper passage opening can be covered by air guiding elements of a radiator grille, which direct the inflowing air onto an intercooler arranged in the overlap region of the upper passage opening.
  • a further large-area passage opening can be provided in the molded part below the bending beam in order to supply cooling units arranged in the lower region with cooling air.
  • the lower boundary edge of the upper passage opening can be designed in such a way that it lies sealingly against the back of the bending beam. This can prevent turbulence or cross currents between the bending beam and the inside of the bumper.
  • two circular openings are provided on both sides of the upper passage opening, from each of which a hollow cylindrical boundary wall protrudes from the round edge regions delimiting the openings.
  • Intake air ducts for an internal combustion engine arranged in the engine compartment can be connected to these connections. A separate air line can therefore be omitted.
  • Two further circular openings on both sides of the upper passage opening can be designed as a passage for charge air lines.
  • An outside corner area of the molded part can be pivotally attached to the molded part. This has the advantage that at assembly this corner area can be folded to save space and is folded back after assembly.
  • FIG. 1 is a perspective view of a molded part obliquely from the front
  • Fig. 2 is a perspective view of the molded part according to FIG. 1 obliquely from behind
  • FIG. 3 shows a longitudinal section through a stem of a motor vehicle along the line III-III in FIG. 2,
  • Fig. 4 shows a second embodiment of a molded part in a perspective view obliquely from the front
  • FIG. 5 shows the molded part according to FIG. 4 in the installed position with a cooling module.
  • a molded part 1 is shown in a perspective front and rear view.
  • the molded part 1 has an approximately T-shaped outer contour and is provided with air guide channels 2, 3, 4 and 5.
  • the air duct 2 is formed by a passage opening 6 made in the molded part 1, from the peripheral regions of which peripheral walls 7 project approximately at right angles.
  • the cross section of the air duct 2 decreases from the front to the rear in the direction of travel, its outlet opening being partially covered on both sides with planar edge regions 8 and 9.
  • the air guiding channels 4 and 5 introduced in the edge regions 8 and 9 are each formed by a passage opening 10 and 11, from the edge region of which a hollow cylindrical boundary wall 12 and 13 projects to the rear.
  • the boundary walls 12 and 13 form connecting pieces for intake air channels of an internal combustion engine, not shown, arranged in the engine compartment.
  • fastening eyes 14 introduced, which serve to hang the molded part 1 in its installed position.
  • corner regions 15 and 16 are provided in the upper region of the air duct 2, which is pivotably articulated on the boundary wall 7 via a film hinge 17.
  • the corner areas 15 and 16 can be folded forward in the direction of the arrow K in order to reduce the width of the molded part 1 during installation.
  • the lower air duct 3 is formed by an approximately rectangular passage opening 18, from the edge regions of which boundary walls 19 protrude.
  • FIG. 3 The arrangement of the molded part 1 in the stem 20 of a motor vehicle (not shown in detail) is shown in FIG. 3 in a sectional view along line III-III in FIG. 1.
  • the stem 20 comprises a bumper unit 21 and a cooling module 22 and is delimited at the top by a bonnet 23 and at the front by a front wall 24.
  • the bumper unit 21 is essentially formed by a bending cross member 25, an inner bumper part 26 and a cladding part 27.
  • a recess 28 is made in the front wall 24 above the bumper unit 21 and is covered with a radiator grille 29.
  • the radiator grille 29 comprises a plurality of air guiding elements 30 which run approximately parallel to one another and extend transversely to the direction of travel F.
  • a further recess 31 is made in the front wall 24, which is covered with a plastic grid 32.
  • a bow apron 33 forms the lower end of the front wall.
  • the cooling module 22 comprises a water cooler 34, a condenser 35 with an accumulator 36. Above the cooling module 22 two cross plates 37 and 38 run closely under the bonnet 20.
  • the boundary wall 7 of the molded part 1 bears with a sealing lip 39 molded onto the rear end in the form of a hook. With its front end, the boundary wall 7 seals the air flow against the transverse plate 38.
  • the molded part 1 lies against its boundary wall 19 with a flange 40.
  • the boundary wall 19 has a hook-shaped sealing lip 41 for connection to the front apron 33, which prevents an uncontrolled outflow of the cooling air in this area.
  • a predominantly perpendicular connecting web 42 which is designed in such a way that a seal to the bending beam 25 is ensured.
  • a flange 43 is formed on the boundary wall 7 forming the upper air duct 2, which lies flat against the bending beam 25.
  • a sealing lip 44 is formed, which rests on a base plate 45 which extends the inside of the bumper part 26.
  • the air flow arising against the direction of travel F is divided by the cutouts 28 and 31 into two flows A and B above and below the bumper unit 21.
  • FIG. 4 shows a second embodiment of the molded part 1 that, in contrast to the embodiment shown in FIGS. 1 to 3, a passage opening 46 or 47 is provided for the charge air cooling below the connecting pieces 12 and 13 for the intake lines of the internal combustion engine
  • FIG. 5 shows a corresponding prefabricated cooling module 22 for the embodiment of the molded part 1 according to FIG. 4, which can be easily inserted into the front end of the motor vehicle.
  • a charge air cooler 48 is assigned to the cooling module 22.
  • the charge air cooler 48 extends over almost the entire width of the air duct 2, with charge air lines 49 and 50 extending laterally from the charge air cooler 48 being guided through the passage openings 46 and 47.
  • the molded part 1, with its fastening eyelets 14, is simply hung on projections of the cooling module 22. There is therefore no need for additional attachment of the molded part 1 after the cooling module 22 has been installed in the stem 20.
  • the width specified by the stem 20 can be achieved by folding in the corner regions 15 and 16 of the molded part 1. After the cooling module 22 has been inserted into the stem 20, the corner regions 15 and 16 can be folded back and their sealing walls can be sealed against the inner contour of the stem.

Abstract

The invention relates to an air duct in the front part of a motor vehicle, comprising recesses in a forewall which defines the front part of the motor vehicle, whereby cooling air flows through said recesses into the engine area. Air guiding channels (6, 10, 11, 18) supply the cooling air to the engine area in a direction which is substantially counter to the direction of travel and are formed by defining walls (7,19) extending in an approximately parallel manner in relation to the direction of the air flow. The aim of the invention is to provide an air duct in the front part of a motor vehicle which is easy to mount and which exhibits very little flow loss. According to the invention, the defining walls (7,19) are integrated into a structural part (1) which extends inside the engine area in an approximately perpendicular manner with respect to the direction of the air flow.

Description

DaimlerChrysler AGDaimlerChrysler AG
Luftführung im Vorbau eines KraftfahrzeugsAir flow in the front of a motor vehicle
Die Erfindung betrifft, eine Luftführung im Vorbau eines Kraftfahrzeugs gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an air duct in the stem of a motor vehicle according to the preamble of patent claim 1.
Aus der DE 38 25 071 Cl ist eine Luftführung im Vorbau eines Kraftfahrzeugs bekannt. In einer den Vorbau begrenzenden Bugwand sind Aussparungen eingebracht, durch die Kühlluft in einen sich hinter der Bugwand befindenden Motorraum einströmt . Im Motorraum sind Luftleitkanäle vorgesehen, die die Kühlluft zu den zu kühlenden Aggregaten zuführen und die durch etwa parallel zur LuftStrömungsrichtung verlaufende Begrenzungswände gebildet sind.From DE 38 25 071 Cl an air duct in the stem of a motor vehicle is known. Recesses are made in a front wall that delimits the stem, through which cooling air flows into an engine compartment located behind the front wall. Air guiding channels are provided in the engine compartment, which supply the cooling air to the units to be cooled and which are formed by boundary walls running approximately parallel to the air flow direction.
Da die Begrenzungsw nde durch Bleche der Rohbaukarosserie geformt werden, müssen diese untereinander und nach außen hin abgedichtet werden, um Leckverluste und Rückströmungen zu vermeiden. Das erfordert einen erhöhten Aufwand in der Montage.Since the boundary walls are formed by metal sheets of the body-in-white, they have to be sealed to one another and to the outside in order to avoid leakage losses and backflows. This requires increased effort in assembly.
Es ist daher Aufgabe der Erfindung, das unter Beibehaltung einer verlustfreien Strömung eine Luftführung im Vorbau eines Kraftfahrzeugs geschaffen wird, bei der die Montage wesentlich vereinfacht ist.It is therefore an object of the invention that an air duct is created in the front end of a motor vehicle while maintaining a loss-free flow, in which the assembly is considerably simplified.
Die Aufgabe wird erfindungsgemäß mit den Merkmalen des Patentanspruchs 1 gelöst . In einer den Vorbau begrenzenden Bugwand sind Aussparungen eingebracht, durch die Kühlluft in einen Motorraum einströmen kann. Die einströmende Luft wird durch sich an die Aussparungen anschließende Luftleitkanäle zu den zu kühlenden Aggregaten im Motorraum geleitet . Die Luftleitkanäle werden erfindungsgemäß durch in ein Formteil integrierte Begrenzungswände gebildet, wobei sich das Formteil etwa quer zur Luftströmungsrichtung erstreckt. Damit ist es möglich, die Begrenzungswände an dem Formteil so auszurichten, dass sowohl ein dichter Anschluss an die Aussparungen als auch an die im Motorraum angeordneten Aggregate möglich ist. Das 'Formteil kann zusammen mit einem Kühlmodul als vormontierte Einheit in den Vorbau geschwenkt werden, ohne dass zusätzliche Abdichtungen der Luftleitkanäle nach außen oder untereinander notwendig sind.The object is achieved with the features of claim 1. Recesses are made in a front wall delimiting the stem, through which cooling air can flow into an engine compartment. The inflowing air is directed through air ducts adjoining the cutouts to the units to be cooled in the engine compartment. According to the invention, the air guiding channels are formed by boundary walls integrated in a molded part, the molded part extending approximately transversely to the air flow direction. It is thus possible to align the boundary walls on the molded part in such a way that both a tight connection to the cutouts and to the units arranged in the engine compartment is possible. The molded part can be pivoted into the stem together with a cooling module as a preassembled unit, without additional sealing of the air guide channels to the outside or to one another being necessary.
Das Formteil kann zumindest teilweise im Überdeckungsbereich der Aussparungen Durchtrittsöffnungen aufweisen. Durch die nachgeschaltete Anordnung des Formteils hinter der Bugwand können die Begrenzungswände sich bis zu den Aussparungen in der Bugwand erstrecken und an den Randbereichen der Aussparung anliegen. Damit kann die einströmende Luft nicht mehr durch abstehende Vorsprünge abgelenkt oder verwirbelt werden.The molded part can have through openings at least partially in the overlap region of the cutouts. As a result of the downstream arrangement of the molded part behind the front wall, the boundary walls can extend as far as the cutouts in the front wall and rest on the edge regions of the cutout. This means that the inflowing air can no longer be deflected or swirled by protruding projections.
In einer Ausführungsform stehen die Begrenzungswände etwa rechtwinklig von den die Durchtrittsöffnungen begrenzenden Randbereichen ab. An den freien Enden der Begrenzungswände sind Dichtlippen umlaufend angebracht oder angeformt, so dass die Durchtrittsöffnungen von angrenzenden Karosseriebereichen nahezu vollständig abgedichtet werden können. Damit können unerwünschte Querströmungen oder Verwirbelungen in einfacher Form unterbunden werden.In one embodiment, the boundary walls protrude approximately at right angles from the edge regions delimiting the passage openings. Sealing lips are attached or molded all around at the free ends of the boundary walls, so that the passage openings can be almost completely sealed off from adjacent body areas. Unwanted cross currents or eddies can thus be prevented in a simple form.
Das Formteil kann weitestgehend hinter einer Stoßfängereinheit angeordnet sein, und so als Verbindungselement zwischen der Stoßfängeranordnung und dem Kühlmodul dienen. Das Form- teil benötigt bei einer derartigen Anordnung keine zusätzlichen Befestigungsmaßnahmen.The molded part can be arranged as far as possible behind a bumper unit and thus serve as a connecting element between the bumper arrangement and the cooling module. The form Part with such an arrangement requires no additional fastening measures.
Eine bevorzugte Ausführungsform besteht darin, dass das Formteil eine großflächige, obere Durchtrittsöffnung oberhalb des zur Stoßfängereinheit gehörenden Biegeträgers aufweist. Eine derartige obere Durchtrittsöffnung kann durch Luftleitelemente eines Kühlergrills abgedeckt sein, die die einströmende Luft auf einen im Überdeckungsbereich der oberen Durchtrittsöffnung angeordneten Ladeluftkühler lenken.A preferred embodiment consists in that the molded part has a large, upper passage opening above the bending beam belonging to the bumper unit. Such an upper passage opening can be covered by air guiding elements of a radiator grille, which direct the inflowing air onto an intercooler arranged in the overlap region of the upper passage opening.
Unterhalb des Biegeträgers kann eine weitere großflächige Durchtrittsöffnung im Formteil vorgesehen sein, um im unteren Bereich angeordnete Kühlaggregate mit Kühlluft zu versorgen.A further large-area passage opening can be provided in the molded part below the bending beam in order to supply cooling units arranged in the lower region with cooling air.
Die untere Begrenzungskante der oberen Durchtrittsöffnung kann so ausgebildet sein, dass sie dichtend an der Rückseite des Biegeträgers anliegt. Damit können Verwirbelungen oder Querströme zwischen dem Biegeträger und dem Stoßfängerinnenteil unterbunden werden.The lower boundary edge of the upper passage opening can be designed in such a way that it lies sealingly against the back of the bending beam. This can prevent turbulence or cross currents between the bending beam and the inside of the bumper.
Beidseitig der oberen Durchtrittsöffnung sind in einer bevorzugten Ausführungsform zwei kreisrunde Öffnungen vorgesehen, von deren runden, die Öffnungen begrenzenden Randbereichen jeweils eine hohlzylindrische Begrenzungswand absteht. An diese Stutzen können Ansaugluftkanäle für eine im Motorraum angeordnete Brennkraftmaschine angeschlossen werden. Eine separate Luftleitung kann damit entfallen.In a preferred embodiment, two circular openings are provided on both sides of the upper passage opening, from each of which a hollow cylindrical boundary wall protrudes from the round edge regions delimiting the openings. Intake air ducts for an internal combustion engine arranged in the engine compartment can be connected to these connections. A separate air line can therefore be omitted.
Zwei weitere kreisrunde Öffnungen beidseitig der oberen Durchtrittsöffnung können als Durchleitung von Lade- luftleitungen ausgebildet sein. Hier entfallen neben der Abdichtung auch Befestigungsmittel für die Ladeluftleitungen.Two further circular openings on both sides of the upper passage opening can be designed as a passage for charge air lines. In addition to the seal, there are also no fasteners for the charge air lines.
Ein außenseitiger Eckbereich des Formteils kann schwenkbar an dem Formteil befestigt sein. Das hat den Vorteil, dass bei der Montage dieser Eckbereich platzsparend eingeklappt werden kann und nach der Montage zurückgeklappt wird.An outside corner area of the molded part can be pivotally attached to the molded part. This has the advantage that at assembly this corner area can be folded to save space and is folded back after assembly.
Weitere Vorteile sowie eine bevorzugte Ausführungsform werden im folgenden anhand der Zeichnung erläutert. Dabei zeigen:Further advantages and a preferred embodiment are explained below with reference to the drawing. Show:
Fig. 1 eine perspektivische Ansicht eines Formteils schräg von vorn,1 is a perspective view of a molded part obliquely from the front,
Fig. 2 eine perspektivische Ansicht des Formteils gemäß Fig. 1 schräg von hintenFig. 2 is a perspective view of the molded part according to FIG. 1 obliquely from behind
Fig. 3 einen Längsschnitt durch einen Vorbau eines Kraftfahrzeugs gemäß der Linie III-III in Fig. 2,3 shows a longitudinal section through a stem of a motor vehicle along the line III-III in FIG. 2,
Fig. 4 eine zweite Ausführungsform eines Formteils in perspektivische Ansicht schräg von vorn sowieFig. 4 shows a second embodiment of a molded part in a perspective view obliquely from the front and
Fig. 5 das Formteil gemäß Fig. 4 in Einbaulage mit einem Kühlmodul .5 shows the molded part according to FIG. 4 in the installed position with a cooling module.
In den Fig. 1 und 2 ist ein Formteil 1 in perspektivischer Front- und Rückansicht dargestellt. Das Formteil 1 weist eine etwa T-fδrmige Außenkontur auf und ist mit Luftleitkanälen 2, 3, 4 und 5 versehen.1 and 2, a molded part 1 is shown in a perspective front and rear view. The molded part 1 has an approximately T-shaped outer contour and is provided with air guide channels 2, 3, 4 and 5.
Der Luftleitkanal 2 wird durch eine im Formteil 1 eingebrachte Durchtrittsöffnung 6 gebildet, von deren Randbereichen umlaufende Begrenzungswände 7 etwa rechtwinklig abstehen. Der Querschnitt des Luftleitkanals 2 nimmt in Fahrrichtung von vorn nach hinten ab, wobei seine Austrittsöffnung beidseitig mit planaren Randbereichen 8 und 9 teilweise abgedeckt ist.The air duct 2 is formed by a passage opening 6 made in the molded part 1, from the peripheral regions of which peripheral walls 7 project approximately at right angles. The cross section of the air duct 2 decreases from the front to the rear in the direction of travel, its outlet opening being partially covered on both sides with planar edge regions 8 and 9.
Die in den Randbereichen 8 und 9 eingebrachten Luftleitkanäle 4 und 5 werden jeweils durch eine Durchtrittsöffnung 10 und 11 gebildet, von deren Randbereich eine hohlzylindrische Begrenzungswand 12 bzw. 13 nach hinten absteht. Die Begrenzungswände 12 und 13 bilden Anschlußstutzen für Ansaugluftkanäle einer nicht dargestellten, im Motorraum angeordneten Brennkraftmaschine. In den Randbereichen 8 und 9 sind Be- festigungsösen 14 eingebracht, die zum Einhängen des Formteils 1 in seiner Einbaulage dienen.The air guiding channels 4 and 5 introduced in the edge regions 8 and 9 are each formed by a passage opening 10 and 11, from the edge region of which a hollow cylindrical boundary wall 12 and 13 projects to the rear. The boundary walls 12 and 13 form connecting pieces for intake air channels of an internal combustion engine, not shown, arranged in the engine compartment. In the edge areas 8 and 9 there are fastening eyes 14 introduced, which serve to hang the molded part 1 in its installed position.
Des weiteren sind zwei Eckbereiche 15 und 16 im oberen Bereich des Luftleitkanals 2 vorgesehen, die schwenkbar über ein Filmscharnier 17 an der Begrenzungswand 7 angelenkt ist . Bei der Montage können die Eckbereiche 15 und 16 nach vorn gemäß Pfeilrichtung K geklappt werden, um die Breite des Formteils 1 beim Einbau zu verkleinern.Furthermore, two corner regions 15 and 16 are provided in the upper region of the air duct 2, which is pivotably articulated on the boundary wall 7 via a film hinge 17. During assembly, the corner areas 15 and 16 can be folded forward in the direction of the arrow K in order to reduce the width of the molded part 1 during installation.
Der untere Luftkanal 3 wird durch eine etwa rechteckige Durchtrittsöffnung 18 gebildet, von deren Randbereichen Begrenzungswände 19 abstehen.The lower air duct 3 is formed by an approximately rectangular passage opening 18, from the edge regions of which boundary walls 19 protrude.
Die Anordnung des Formteils 1 im Vorbau 20 eines nicht näher dargestellten Kraftfahrzeugs zeigt Fig. 3 in einer Schnittdarstellung gemäß Linie III-III in Fig. 1.The arrangement of the molded part 1 in the stem 20 of a motor vehicle (not shown in detail) is shown in FIG. 3 in a sectional view along line III-III in FIG. 1.
Der Vorbau 20 umfasst eine Stoßfängereinheit 21 sowie ein Kühlmodul 22 und wird nach oben durch eine Motorhaube 23 und nach vorn durch eine Bugwand 24 begrenzt.The stem 20 comprises a bumper unit 21 and a cooling module 22 and is delimited at the top by a bonnet 23 and at the front by a front wall 24.
Die Stoßfängereinheit 21 wird im wesentlichen durch einen Biegequerträger 25, ein Stoßfängerinnenteil 26 sowie ein Verkleidungsteil 27 gebildet. Oberhalb der Stoßfängereinheit 21 ist eine Aussparung 28 in die Bugwand 24 eingebracht, die mit einem Kühlergitter 29 abgedeckt ist. Das Kühlergitter 29 umfasst mehrere etwa parallel zueinander verlaufende Luftleit- elemente 30, die sich quer zur Fahrtrichtung F erstrecken.The bumper unit 21 is essentially formed by a bending cross member 25, an inner bumper part 26 and a cladding part 27. A recess 28 is made in the front wall 24 above the bumper unit 21 and is covered with a radiator grille 29. The radiator grille 29 comprises a plurality of air guiding elements 30 which run approximately parallel to one another and extend transversely to the direction of travel F.
Unterhalb der Stoßfängereinheit 21 ist eine weitere Aussparung 31 in die Bugwand 24 eingebracht, die mit einem Kunst- stoffgitter 32 abgedeckt ist. Den unteren Abschluss der Bugwand bildet eine Bugschürze 33.Below the bumper unit 21, a further recess 31 is made in the front wall 24, which is covered with a plastic grid 32. A bow apron 33 forms the lower end of the front wall.
Das Kühlmodul 22 umfasst einen Wasserkühler 34, einen Kondensator 35 mit einem Akkumulator 36. Oberhalb des Kühlmoduls 22 verlaufen zwei Querbleche 37 und 38 dicht unter der Motorhaube 20.The cooling module 22 comprises a water cooler 34, a condenser 35 with an accumulator 36. Above the cooling module 22 two cross plates 37 and 38 run closely under the bonnet 20.
Am oberen Ende des Kühlmoduls 22 liegt die Begrenzungswand 7 des Formteils 1 mit einer hakenförmig am hinteren Ende angeformten Dichtungslippe 39 an. Mit ihrem vorderen Ende dichtet die Begrenzungswand 7 den Luftström gegen das Querblech 38 ab.At the upper end of the cooling module 22, the boundary wall 7 of the molded part 1 bears with a sealing lip 39 molded onto the rear end in the form of a hook. With its front end, the boundary wall 7 seals the air flow against the transverse plate 38.
Am unteren Ende des Kühlmoduls 22 liegt das Formteil 1 mit einem Flansch 40 seiner Begrenzungswand 19 an. Die Begrenzungswand 19 weist für den Anschluß an die Bugschürze 33 eine hakenförmige Dichtlippe 41 auf, die einen unkontrollierten Abstrom der Kühlluft in diesem Bereich verhindert.At the lower end of the cooling module 22, the molded part 1 lies against its boundary wall 19 with a flange 40. The boundary wall 19 has a hook-shaped sealing lip 41 for connection to the front apron 33, which prevents an uncontrolled outflow of the cooling air in this area.
Zwischen den Luftleitkanälen 2 und 3 des Formteils 1 befindet sich ein vorwiegend senkrecht verlaufender Verbindungssteg 42, der so ausgebildet ist, dass eine Abdichtung zum Biegeträger 25 gewährleistet ist. Dazu ist an der den oberen Luftleitkanal 2 bildenden Begrenzungswand 7 ein Flansch 43 angeformt, der am Biegeträger 25 flächig anliegt. An der den Luftleitkanal 3 bildenden Begrenzungswand 19 ist eine Dichtungslippe 44 angeformt, die auf einem das Stoßfängerinnenteil 26 nach innen verlängernden Bodenplatte 45 aufliegt. Damit kann es zu keinen nennenswerten Verwirbelungen oder Querströmungen am Biegeträger 25 kommen.Between the air guide channels 2 and 3 of the molded part 1 there is a predominantly perpendicular connecting web 42, which is designed in such a way that a seal to the bending beam 25 is ensured. For this purpose, a flange 43 is formed on the boundary wall 7 forming the upper air duct 2, which lies flat against the bending beam 25. On the boundary wall 19 forming the air duct 3, a sealing lip 44 is formed, which rests on a base plate 45 which extends the inside of the bumper part 26. As a result, there can be no significant turbulence or cross currents on the bending beam 25.
Der entgegen der Fahrtrichtung F entstehende Luftstrom wird durch die Aussparungen 28 und 31 in zwei Strömungen A und B oberhalb und unterhalb der Stoßfängereinheit 21 geteilt.The air flow arising against the direction of travel F is divided by the cutouts 28 and 31 into two flows A and B above and below the bumper unit 21.
Aus Fig. 4 geht eine zweite Ausführungsform des Formteils 1 hervor, dass im Unterschied zu der in den Fig. 1 bis 3 gezeigten Ausführung unterhalb der Anschlußstutzen 12 und 13 für die Ansaugleitungen der Brennkraftmaschine jeweils eine Durchleitungsδffnung 46 bzw. 47 für die Ladeluftkühlung vorgesehen ist . Fig. 5 zeigt für die Ausführungsform des Formteils 1 nach Fig. 4 ein entsprechendes vorgefertigtes Kühlmodul 22, das einfach in den Vorbau des Kraftfahrzeugs eingesetzt werden kann.4 shows a second embodiment of the molded part 1 that, in contrast to the embodiment shown in FIGS. 1 to 3, a passage opening 46 or 47 is provided for the charge air cooling below the connecting pieces 12 and 13 for the intake lines of the internal combustion engine , FIG. 5 shows a corresponding prefabricated cooling module 22 for the embodiment of the molded part 1 according to FIG. 4, which can be easily inserted into the front end of the motor vehicle.
Zusätzlich zum Wasserkühler 34 und zum Kondensator 35 mit Akkumulator 36 ist ein Ladeluftkühler 48 dem Kühlmodul 22 zugeordnet. Der Ladeluftkühler 48 erstreckt sich über nahezu die gesamte Breite des Luftkanals 2, wobei seitlich vom Ladeluftkühler 48 abgehende Ladeluftleitungen 49 und 50 durch die Durchleitungsδffnungen 46 und 47 geführt werden.In addition to the water cooler 34 and the condenser 35 with the accumulator 36, a charge air cooler 48 is assigned to the cooling module 22. The charge air cooler 48 extends over almost the entire width of the air duct 2, with charge air lines 49 and 50 extending laterally from the charge air cooler 48 being guided through the passage openings 46 and 47.
Von besonderem Vorteil ist, dass das Formteil 1 mit seinen Befestigungsösen 14 einfach an Vorsprüngen des Kühlmoduls 22 eingehängt wird. Es bedarf damit keiner zusätzlichen Befestigung des Formteils 1 nach der Montage des Kühlmoduls 22 im Vorbau 20. Die durch den Vorbau 20 vorgegebene Breite kann durch das Anklappen der Eckbereiche 15 und 16 des Formteils 1 erreicht werden. Nach dem Einsetzen des Kühlmoduls 22 in den Vorbau 20 können die Eckbereiche 15 und 16 zurückgeklappt und mit ihren Begrenzungswänden an die Innenkontur des Vorbaus dichtend angelegt werden. It is particularly advantageous that the molded part 1, with its fastening eyelets 14, is simply hung on projections of the cooling module 22. There is therefore no need for additional attachment of the molded part 1 after the cooling module 22 has been installed in the stem 20. The width specified by the stem 20 can be achieved by folding in the corner regions 15 and 16 of the molded part 1. After the cooling module 22 has been inserted into the stem 20, the corner regions 15 and 16 can be folded back and their sealing walls can be sealed against the inner contour of the stem.

Claims

DaimlerChrysler AGPatentansprüche DaimlerChrysler AG patent claims
Luftführung im Vorbau eines Kraftfahrzeugs mit Aussparungen in einer den Vorbau begrenzenden Bugwand, durch die Kühlluft in einen Motorraum einströmt, wobei Luftleitkanäle vorgesehen sind, die die Kühlluft im wesentlichen entgegen der Fahrtrichtung in den Motorraum zuführen und die durch etwa parallel zur Luftströmungsrichtung verlaufende Begrenzungswände gebildet sind, d a d u r c h g e k e n n z e i c h n e t , dass die Begrenzungswände (7, 19) in ein Formteil (1) integriert sind, das sich im Motorraum etwa quer zur Luft- strδmungsrichtung erstreckt .Air duct in the front end of a motor vehicle with recesses in a front wall delimiting the front end, through which cooling air flows into an engine compartment, air guiding channels being provided which supply the cooling air into the engine compartment essentially counter to the direction of travel and which are formed by boundary walls which run approximately parallel to the air flow direction , characterized in that the boundary walls (7, 19) are integrated in a molded part (1) which extends approximately transversely to the direction of air flow in the engine compartment.
Luftführung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass das Formteil (1) zumindest teilweise im Überdeckungsbereich der Aussparungen (28, 31) Durchtrittsöffnungen (6, 10, 11, 18) aufweist.Air duct according to claim 1, so that the molded part (1) has through openings (6, 10, 11, 18) at least partially in the overlap region of the recesses (28, 31).
Luftführung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , dass die Begrenzungswände (7, 19) etwa rechtwinklig von den die Durchtrittsöffnungen (6, 18) begrenzenden Randbereichen abstehen, wobei die freien Enden der Begrenzungswände mit umlaufenden Dichtlippen (39, 41, 44) versehen sind. Air duct according to claim 1 or 2, characterized in that the boundary walls (7, 19) project approximately at right angles from the edge regions delimiting the passage openings (6, 18), the free ends of the boundary walls being provided with circumferential sealing lips (39, 41, 44) ,
4. Luftführung nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t , dass das Formteil (1) überwiegend hinter einer Stoßfängereinheit (21) angeordnet ist, wobei die Stoßfängereinheit (21) eine Stoßfängerverkleidung (27) einen Biegequerträger (25) und ein Stoßfängerinnerteil ( (26) umfasst.4. Air duct according to claim 3, so that the molded part (1) is predominantly arranged behind a bumper unit (21), the bumper unit (21) comprising a bumper cover (27), a bending cross member (25) and a bumper inner part ((26).
5. Luftführung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass eine der Durchtrittsδffnungen eine großflächige, o- bere Durchtrittsöffnung (6) oberhalb des Biegequerträgers (25) ist.5. Air duct according to claim 1, so that one of the passage openings is a large, upper passage opening (6) above the bending cross member (25).
6. Luftführung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass eine der Durchtrittsöffnungen eine großflächige, untere Durchtrittsöffnung (18) unterhalb des Biegequerträgers (25) ist.6. Air duct according to claim 1, so that one of the passage openings is a large, lower passage opening (18) below the bending cross member (25).
7. Luftführung nach Anspruch 5, d a d u r c h g e k e n n z e i c h n e t , dass die untere Begrenzungskante (7) der oberen Durchtrittsöffnung (6) des Formteils (1) dichtend an der Rückseite des Biegequerträgers (25) anliegt.7. Air duct according to claim 5, so that the lower boundary edge (7) of the upper passage opening (6) of the molded part (1) sealingly rests against the rear of the bending cross member (25).
8. Luftführung nach Anspruch 7, d a d u r c h g e k e n n z e i c h n e t , dass beidseitig der oberen Durchtrittsöffnung (6) zwei kreisrunde Öffnungen (10, 11) vorgesehen sind, von deren die Öffnungen begrenzenden Randbereichen jeweils eine hohlzylindrische Begrenzungswand (12, 13) absteht.8. Air duct according to claim 7, so that two circular openings (10, 11) are provided on both sides of the upper passage opening (6, 11), from each of which a hollow cylindrical boundary wall (12, 13) protrudes from the edge regions delimiting the openings.
9. Luftführung nach Anspruch 8, d a d u r c h g e k e n n z e i c h n e t , dass zwei weitere kreisrunde Öffnungen (46, 47) beidseitig der oberen Durchtrittsoff ung (6) vorgesehen sind. 9. Air duct according to claim 8, characterized in that two further circular openings (46, 47) are provided on both sides of the upper passage opening (6).
0. Luftführung nach einem der Ansprüche 1 bis 9, d a d u r c h g e k e n n z e i c h n e t , dass wenigstens ein außenseitiger Eckbereich (15, 16) des Formteils (1) schwenkbar mit dem Formteil (1) verbunden ist . 0. Air duct according to one of claims 1 to 9, so that at least one outer corner region (15, 16) of the molded part (1) is pivotally connected to the molded part (1).
EP03750573A 2002-10-17 2003-09-18 Air duct in the front part of a motor vehicle Withdrawn EP1552123A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10248440 2002-10-17
DE10248440A DE10248440B4 (en) 2002-10-17 2002-10-17 Air duct in the stem of a motor vehicle
PCT/EP2003/010389 WO2004036008A1 (en) 2002-10-17 2003-09-18 Air duct in the front part of a motor vehicle

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EP1552123A1 true EP1552123A1 (en) 2005-07-13

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EP (1) EP1552123A1 (en)
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WO (1) WO2004036008A1 (en)

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