EP2514934A1 - Lubrication tray for a combustion engine - Google Patents

Lubrication tray for a combustion engine Download PDF

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Publication number
EP2514934A1
EP2514934A1 EP12159571A EP12159571A EP2514934A1 EP 2514934 A1 EP2514934 A1 EP 2514934A1 EP 12159571 A EP12159571 A EP 12159571A EP 12159571 A EP12159571 A EP 12159571A EP 2514934 A1 EP2514934 A1 EP 2514934A1
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EP
European Patent Office
Prior art keywords
lubricant
walls
radius
trough
combustion engine
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.)
Granted
Application number
EP12159571A
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German (de)
French (fr)
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EP2514934B1 (en
Inventor
Alfred Sadlauer
Gerald Goekler
Christian Schroecker
Martin Wieländer
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication of EP2514934A1 publication Critical patent/EP2514934A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/002—Oilsumps with means for improving the stiffness

Definitions

  • the invention relates to a lubricant pan for an internal combustion engine with the features of the preamble of patent claim 1.
  • Die casting lubricant troughs usually have consistent wall thicknesses. For example, stiffness and acoustic requirements are met with additional ribbing. An example of this measure is from the German patent specification DE 40 14 788 C1 known.
  • ribs mean extra weight and a restriction on the oil flow direction with respect to engine leaning. Each rib also means additional, expensive tooling and often requires additional cooling channels in the tool.
  • a disadvantage of this known embodiment is a very complex production of the lubricant pan.
  • German patent application DE 40 09 688 A1 a final part or shielding for motor housing of internal combustion engines, such as oil pans, known, which has at least one of the sound emission of the motor housing significantly involved wall area, which is characterized in that this wall area is flat or slightly curved and at least partially limited by a narrow zone in that the stiffness of the wall material with respect to the rigidity of the wall material outside this zone is reduced by at least 30%, preferably by more than 50%, which leads to a shift of the first self-resonance of the wall area to lower frequencies.
  • a disadvantage of this configuration is a complicated demolding of the lubricant pan after an injection molding or casting process.
  • This known prior art is characterized by a relatively complex production of the lubricant pan.
  • the present invention seeks to show a lubricant pan that is easy to manufacture and meets the acoustic requirements while maintaining rigidity.
  • the lubricant pan Due to the design of the lubricant pan a significant weight advantage is achieved while maintaining rigidity, since according to the invention can be dispensed with additional ribs.
  • the tooling costs are significantly lower, since, for example, no ribbing and / or undercut can be provided on the tool side.
  • no effort for additional cooling of the tools is necessary because no rib areas must be cooled. This leads advantageously to a lower tool tuning requirement and fewer reject parts.
  • the non-ribbed surface of the lubricant pan according to the invention less fire cracks and breakouts on the casting tools, which can be made with a casting tool more lubricant pans and thus the production costs can be reduced.
  • the shape of the material flow in the casting process is favored.
  • the size ranges according to the claims 2 to 5 are particularly preferred size range for a lubricant pan according to the invention.
  • An embodiment according to claim 6 advantageously reduces the sound radiation of the side walls, whereby the acoustics is further improved.
  • Fig. 1 shows a plan view of a three-dimensional illustrated cut lubricant cup according to the invention 1.
  • a sectional surface of the lubricant pan 1 is shown hatched.
  • the bowl-shaped lubricant pan 1 is shown in the installed position and a numbered with U arrow shows geodetic down.
  • the lubricant pan 1 is provided for an internal combustion engine, not shown, and has a mounting flange 2 for fastening the lubricant pan 1 to a likewise not shown crankcase of the internal combustion engine.
  • At the mounting flange 2 close in the direction of geodetic down side walls 3 at. These lateral walls 3 go geodetic down over a radius in a bottom 4 of the lubricant pan 1 over.
  • the lubricant-tight bowl shape of the lubricant pan 1 is formed by the side walls 3 and the bottom 4, the mounting flange 2 is for mounting on the internal combustion engine and the rigidity.
  • a floor thickness d decreases from a geometric floor center 5 (shown in FIG Fig. 2 ) in the direction of the walls 3 to continuously, wherein an inner radius R i at the transition from the bottom 4 to the walls 3 is greater than a corresponding outer radius R a .
  • the area of the geometric center of the ground 5 is shown as a crossing point.
  • the geometric the center of the floor 5 can be up to 30% of the total floor area in terms of area in which the punctiform geometric floor center 5 lies.
  • the bottom thickness d in the region of the bottom center 5 has a wall thickness of at least 2 mm and at the transition to the radius 3 has a wall thickness of not more than 10 mm.
  • the radius of the transition from the bottom 4 to the walls 3 preferably has an outer radius R a of at least 3 mm and the corresponding inner radius R i of this has preferably the double outer radius R a and at least 6 mm.
  • the walls 3 have a geometry corresponding to the floor 4. This means that an in Fig. 1 constant ground thickness d continuously increases from a geometric wall center in the direction of the bottom 4 or the mounting flange 2 or a connecting the wall 3, wherein an inner radius R i at the transition from the walls to the bottom 4 and at the transition to the mounting flange 2 is greater than a corresponding outer radius R a .
  • the lubricant trough 1 is preferably a cast part, wherein the lubricant trough 1 can be produced as a die cast part or a sand casting or an injection molded part.
  • Fig. 2 shows a plan view of an underside of a three-dimensionally illustrated inventive lubricant pan 1.
  • the base 4 starting from the region of its geometric center 5 an increasing wall thickness in the direction of the walls 3, which is marked by individual rings shown by dashed lines.
  • a ground thickness d belonging to a ring is in each case by way of example applied, starting at 2.3 mm for the geometric center 5 of the base 4, up to a thickness of 4.1 mm in the area of the outer radius R a ,
  • a U-numbered arrow in turn marks the direction of geodesic below.
  • the wall thickness of the bottom 4 changes starting from the production-related, supplier-specific minimum wall thickness of 2.3 mm, even 2 mm are still displayed in the antinode (bottom center), towards the corners continuously to 3 to 3.5 mm.
  • the range of the radius itself is, as shown in the table, about 4.1 mm.
  • the same design can also be applied to the walls 3, but is in Fig. 2 not shown.
  • the Eckenausrundungen have the inversion for this version, in the vertex, the wall thickness is greater (inner radius R i is about twice as large as the outer radius R a ).
  • the inventive design of the lubricant pan 1 brings a significant weight advantage, since with constant stiffness can be dispensed with additional ribs.
  • the tool costs are lower.
  • the material flow is favored during casting, there is no additional overhead costs for additional cooling of the tool necessary. This leads advantageously to a lower tool tuning requirement and less rejects.
  • casting methods such as die casting, sand casting or injection molding are used for the production.
  • the radii R i and R a can also be represented as bevels, ie the radii assume the value "infinite".

Abstract

The lubricant tank (1) comprises a mounting flange (2) for fastening the lubricant tank to a crankcase of the internal combustion engine, on which the lateral walls (3) of the lubricant tank are arranged. The bottom thickness (d) of a geometric base center continuously increases in the direction of the walls. The inner radius (Ri) is greater than or the same size corresponding to the outer radius (Ra) at the transition of a base (4) to the walls. The bottom thickness in the base center has a wall thickness of 2 millimeter.

Description

Die Erfindung betrifft eine Schmiermittelwanne für eine Brennkraftmaschine mit den Merkmalen aus dem Oberbegriff des Patentanspruchs 1.The invention relates to a lubricant pan for an internal combustion engine with the features of the preamble of patent claim 1.

Druckgussschmiermittelwannen haben üblicherweise gleichbleibende Wandstärken. Steifigkeits- und Akustikanforderungen werden beispielsweise mit einer zusätzlichen Verrippung erfüllt. Ein Beispiel für diese Maßnahme ist aus der deutschen Patentschrift DE 40 14 788 C1 bekannt.Die casting lubricant troughs usually have consistent wall thicknesses. For example, stiffness and acoustic requirements are met with additional ribbing. An example of this measure is from the German patent specification DE 40 14 788 C1 known.

Rippen bedeuten jedoch Zusatzgewicht und eine Einschränkung der Ölfließrichtung in Bezug auf Brennkraftmaschinenschräglagen. Jede Rippe bedeutet außerdem eine zusätzliche, teure Werkzeugbearbeitung und erfordert vielfach zusätzliche Kühlkanäle im Werkzeug.However, ribs mean extra weight and a restriction on the oil flow direction with respect to engine leaning. Each rib also means additional, expensive tooling and often requires additional cooling channels in the tool.

Eine weitere Möglichkeit um die Akustikanforderungen zu erreichen ist aus der deutschen Offenlegungsschrift DE 103 02 191 A1 bekannt. Die technische Lehre dieser Offenbarung löst die Akustikaufgabe dadurch, dass eine aus Kunststoff gebildete Wandung eines wannenförmigen Körpers teilweise durch ein mehrlagiges Bauteil ersetzt ist, das mindestens eine Lage aus einem Metall und mindestens eine aus einem Kunststoff aus viskoelastischem Material gebildete Lage aufweist. Hierbei ist das mehrlagige Teil an seinem Rand mit dem Kunststoff der Ölwannenwandung umspritzt.Another way to achieve the acoustic requirements is from the German patent application DE 103 02 191 A1 known. The technical teaching of this disclosure solves the acoustic task in that a plastic-formed wall of a trough-shaped body is partially replaced by a multi-layer component having at least one layer of a metal and at least one layer formed of a plastic material of viscoelastic material. Here, the multilayer part is encapsulated at its edge with the plastic of the oil sump wall.

Nachteilig an dieser bekannten Ausgestaltung ist eine sehr aufwändige Fertigung der Schmiermittelwanne.A disadvantage of this known embodiment is a very complex production of the lubricant pan.

Weiter ist aus der deutschen Offenlegungsschrift DE 40 09 688 A1 ein Abschlussteil oder Abschirmteil für Motorgehäuse von Brennkraftmaschinen, beispielsweise Ölwannen, bekannt, welches zumindest einen an der Schallemission des Motorgehäuses maßgeblich beteiligten Wandbereich aufweist, der dadurch gekennzeichnet ist, dass dieser Wandbereich eben oder leicht gewölbt ausgeführt ist und zumindest teilweise von einer schmalen Zone begrenzt ist, welche die Steifigkeit des Wandmaterials gegenüber der Steifigkeit des Wandmaterials außerhalb dieser Zone um zumindest 30 %, vorzugsweise um mehr als 50 % vermindert ist, was zu einer Verschiebung der ersten Eigenresonanz des Wandbereiches zu tieferen Frequenzen führt.Next is from the German patent application DE 40 09 688 A1 a final part or shielding for motor housing of internal combustion engines, such as oil pans, known, which has at least one of the sound emission of the motor housing significantly involved wall area, which is characterized in that this wall area is flat or slightly curved and at least partially limited by a narrow zone in that the stiffness of the wall material with respect to the rigidity of the wall material outside this zone is reduced by at least 30%, preferably by more than 50%, which leads to a shift of the first self-resonance of the wall area to lower frequencies.

Nachteilig an dieser Ausgestaltung ist eine komplizierte Entformung der Schmiermittelwanne nach einem Spritzguss- oder Gießvorgang.A disadvantage of this configuration is a complicated demolding of the lubricant pan after an injection molding or casting process.

Eine weitere Maßnahme zur Akustikverbesserung von Schmiermittelwannen ist aus der deutschen Offenlegungsschrift DE 32 32 602 A1 bekannt. In dieser Offenlegungsschrift wird vorgeschlagen, tiefgezogene Motorenteile aus Stahlblech, wie z. B. Ölwannen, Zylinderkopfdeckel, Auspuffkrümmer, Riemenscheiben und dgl. derart zu fertigen, dass die Teile aus Doppelblechen unterschiedlicher Wandstärke bestehen und dass die Einzelbleche über die ganze Fläche aneinander anliegen.Another measure for improving the acoustics of lubricant troughs is from the German patent application DE 32 32 602 A1 known. In this publication, it is proposed deep-drawn engine parts made of sheet steel, such. As oil pans, cylinder head cover, exhaust manifold, pulleys and the like. To manufacture such that the parts consist of double sheets of different wall thickness and that the individual sheets abut each other over the entire surface.

Auch dieser bekannte Stand der Technik zeichnet sich durch eine relativ aufwändige Fertigung der Schmiermittelwanne aus.This known prior art is characterized by a relatively complex production of the lubricant pan.

Ausgehend von dem bekannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Schmiermittelwanne aufzuzeigen, die einfach zu fertigen ist und die Akustikanforderungen bei gleichbleibender Steifigkeit erfüllt.Based on the known prior art, the present invention seeks to show a lubricant pan that is easy to manufacture and meets the acoustic requirements while maintaining rigidity.

Diese Aufgabe wird durch die Merkmale im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is solved by the features in the characterizing part of patent claim 1.

Aufgrund der Ausgestaltung der Schmiermittelwanne wird ein deutlicher Gewichtsvorteil bei gleichbleibender Steifigkeit erzielt, da erfindungsgemäß auf zusätzliche Rippen verzichtet werden kann. Zusätzlich werden die Werkzeugkosten deutlich geringer, da werkzeugseitig beispielsweise keine Verrippung und/oder keine Hinterschneidung vorzuhalten ist. Auch ist kein Aufwand für eine zusätzliche Kühlung der Werkzeuge notwendig, da keine Rippenbereiche gekühlt werden müssen. Dies führt in vorteilhafter Weise zu einem geringeren Werkzeugabstimmbedarf und weniger Ausschussteilen. In vorteilhafter Weise entstehen durch die unverrippte Oberfläche der erfindungsgemäßen Schmiermittelwanne weniger Brandrisse und Ausbrüche an den Gießwerkzeugen, wodurch mit einem Gießwerkzeug mehr Schmiermittelwannen hergestellt und somit die Fertigungskosten gesenkt werden können. Darüber hinaus wird durch die Formgebung der Materialfluss bei dem Gießvorgang begünstigt.Due to the design of the lubricant pan a significant weight advantage is achieved while maintaining rigidity, since according to the invention can be dispensed with additional ribs. In addition, the tooling costs are significantly lower, since, for example, no ribbing and / or undercut can be provided on the tool side. Also, no effort for additional cooling of the tools is necessary because no rib areas must be cooled. This leads advantageously to a lower tool tuning requirement and fewer reject parts. Advantageously, caused by the non-ribbed surface of the lubricant pan according to the invention less fire cracks and breakouts on the casting tools, which can be made with a casting tool more lubricant pans and thus the production costs can be reduced. In addition, the shape of the material flow in the casting process is favored.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen dargestellt.Advantageous developments of the invention are illustrated in the subclaims.

Die Größenbereiche gemäß den Patentansprüchen 2 bis 5 sind besonders bevorzugte Größenbereich für eine erfindungsgemäße Schmiermittelwanne.The size ranges according to the claims 2 to 5 are particularly preferred size range for a lubricant pan according to the invention.

Eine Ausgestaltung gemäß Patentanspruch 6 reduziert in vorteilhafter Weise auch die Schallabstrahlung der Seitenwände, wodurch die Akustik nochmals verbessert wird.An embodiment according to claim 6 advantageously reduces the sound radiation of the side walls, whereby the acoustics is further improved.

Gemäß Patentanspruch 7 ist die Schmiermittelwanne besonders bevorzugt ein Gussteil und gefertigt mit einem der Verfahren gemäß Patentanspruch 8. Im Folgenden ist die Erfindung anhand eines besonders bevorzugten Ausführungsbeispieles in zwei Figuren näher erläutert.

Fig. 1
zeigt eine Aufsicht auf eine dreidimensional dargestellte geschnittene erfindungsgemäße Schmiermittelwanne.
Fig. 2
zeigt die Aufsicht auf eine dreidimensional dargestellte erfindungsgemäße Schmiermittelwanne von unten.
According to claim 7, the lubricant pan is particularly preferably a casting and manufactured with one of the methods according to claim 8. In the following the invention with reference to a particularly preferred embodiment in two figures is explained in more detail.
Fig. 1
shows a plan view of a three-dimensionally illustrated cut lubricant cup according to the invention.
Fig. 2
shows the top view of a three-dimensional illustrated lubricant cup according to the invention from below.

Im Folgenden gelten für gleiche Bauelemente in beiden Figuren die gleichen Bezugsziffern.Below, the same reference numerals apply to like components in both figures.

Fig. 1 zeigt eine Aufsicht auf eine dreidimensional dargestellte geschnittene erfindungsgemäße Schmiermittelwanne 1. Eine Schnittfläche der Schmiermittelwanne 1 ist schraffiert dargestellt. Die schüsselförmige Schmiermittelwanne 1 ist in Einbaulage dargestellt und ein mit U bezifferter Pfeil zeigt geodätisch nach unten. Die Schmiermittelwanne 1 ist für eine nicht dargestellte Brennkraftmaschine vorgesehen und weist einen Montageflansch 2 zur Befestigung der Schmiermittelwanne 1 an einem ebenfalls nicht dargestellten Kurbelgehäuse der Brennkraftmaschine auf. An den Montageflansch 2 schließen sich in Richtung geodätisch nach unten seitliche Wände 3 an. Diese seitlichen Wände 3 gehen geodätisch unten über einen Radius in einen Boden 4 der Schmiermittelwanne 1 über. Somit wird die schmiermitteldichte Schüsselform der Schmiermittelwanne 1 von den Seitenwänden 3 und dem Boden 4 gebildet, der Montageflansch 2 dient der Montage an der Brennkraftmaschine und der Steifigkeit. Fig. 1 shows a plan view of a three-dimensional illustrated cut lubricant cup according to the invention 1. A sectional surface of the lubricant pan 1 is shown hatched. The bowl-shaped lubricant pan 1 is shown in the installed position and a numbered with U arrow shows geodetic down. The lubricant pan 1 is provided for an internal combustion engine, not shown, and has a mounting flange 2 for fastening the lubricant pan 1 to a likewise not shown crankcase of the internal combustion engine. At the mounting flange 2 close in the direction of geodetic down side walls 3 at. These lateral walls 3 go geodetic down over a radius in a bottom 4 of the lubricant pan 1 over. Thus, the lubricant-tight bowl shape of the lubricant pan 1 is formed by the side walls 3 and the bottom 4, the mounting flange 2 is for mounting on the internal combustion engine and the rigidity.

Erfindungsgemäß nimmt eine Bodendicke d von einer geometrischen Bodenmitte 5 (dargestellt in Fig. 2) in Richtung der Wände 3 kontinuierlich zu, wobei ein Innenradius Ri am Übergang vorn Boden 4 zu den Wänden 3 größer als ein korrespondierender Außenradius Ra ist. Der Bereich der geometrischen Bodenmitte 5 ist als Kreuzungspunkt dargestellt. Die geometrische Bodenmitte 5 kann jedoch flächenmäßig bis zu 30 % der gesamten Bodenfläche betragen in dem die punktförmige geometrische Bodenmitte 5 liegt.According to the invention, a floor thickness d decreases from a geometric floor center 5 (shown in FIG Fig. 2 ) in the direction of the walls 3 to continuously, wherein an inner radius R i at the transition from the bottom 4 to the walls 3 is greater than a corresponding outer radius R a . The area of the geometric center of the ground 5 is shown as a crossing point. The geometric However, the center of the floor 5 can be up to 30% of the total floor area in terms of area in which the punctiform geometric floor center 5 lies.

Bevorzugt weist die Bodendicke d im Bereich der Bodenmitte 5 eine Wandstärke von mindestens 2 mm und am Übergang zum Radius 3 eine Wandstärke von maximal 10 mm auf. Bezüglich des Radius vom Übergang vom Boden 4 zu den Wänden 3 weist dieser bevorzugt einen Außenradius Ra von mindestens 3 mm und der korrespondierende Innenradius Ri bevorzugt den doppelten Außenradius Ra und mindestens 6 mm auf.Preferably, the bottom thickness d in the region of the bottom center 5 has a wall thickness of at least 2 mm and at the transition to the radius 3 has a wall thickness of not more than 10 mm. With respect to the radius of the transition from the bottom 4 to the walls 3 preferably has an outer radius R a of at least 3 mm and the corresponding inner radius R i of this has preferably the double outer radius R a and at least 6 mm.

In einer weiteren besonders bevorzugten Ausführungsform welsen die Wände 3 eine Geometrie entsprechend dem Boden 4 auf. Dies bedeutet, dass eine in Fig. 1 konstante Bodendicke d von einer geometrischen Wandmitte in Richtung des Bodens 4 bzw. des Montageflansches 2 oder einer anschließen den Wand 3 kontinuierlich zunimmt, wobei ein Innenradius Ri am Übergang von den Wänden zum Boden 4 bzw. am Übergang zu dem Montageflansch 2 größer ist als ein korrespondierender Außenradius Ra.In a further particularly preferred embodiment, the walls 3 have a geometry corresponding to the floor 4. This means that an in Fig. 1 constant ground thickness d continuously increases from a geometric wall center in the direction of the bottom 4 or the mounting flange 2 or a connecting the wall 3, wherein an inner radius R i at the transition from the walls to the bottom 4 and at the transition to the mounting flange 2 is greater than a corresponding outer radius R a .

Bevorzugt ist die Schmiermittelwanne 1 ein Gussteil, wobei die Schmiermittelwanne 1 als ein Druckgussteil oder ein Sandgusstell oder ein Spritzgussteil herstellbar ist.The lubricant trough 1 is preferably a cast part, wherein the lubricant trough 1 can be produced as a die cast part or a sand casting or an injection molded part.

Fig. 2 zeigt eine Aufsicht auf eine Unterseite einer dreidimensional dargestellten erfindungsgemäßen Schmiermittelwanne 1. Wie aus Fig. 2 ersichtlich ist, weist der Boden 4 ausgehend vom Bereich seiner geometrischen Mitte 5 eine zunehmende Wandstärke in Richtung der Wände 3 auf, was durch einzelne gestrichelt dargestellte Ringe markiert ist. In einer oberhalb der Schmiermittelwanne 1 dargestellten Tabelle ist jeweils eine zu einem Ring zugehörige Bodenstärke d beispielhaft aufgetragen, beginnend bei 2,3 mm für die geometrische Mitte 5 des Bodens 4, bis zu einer Stärke von 4,1 mm im Bereich des Außenradius Ra. Ein mit U bezifferter Pfeil markiert wiederum die Richtung nach geodätisch unten. Fig. 2 shows a plan view of an underside of a three-dimensionally illustrated inventive lubricant pan 1. As from Fig. 2 can be seen, the base 4, starting from the region of its geometric center 5 an increasing wall thickness in the direction of the walls 3, which is marked by individual rings shown by dashed lines. In a table shown above the lubricant trough 1, a ground thickness d belonging to a ring is in each case by way of example applied, starting at 2.3 mm for the geometric center 5 of the base 4, up to a thickness of 4.1 mm in the area of the outer radius R a , A U-numbered arrow in turn marks the direction of geodesic below.

In diesem besonders bevorzugten Ausführungsbeispiel ändert sich die Wandstärke des Bodens 4 ausgehend von der fertigungsbedingten, lieferantenspezifischen minimalen Wandstärke von 2,3 mm, auch 2 mm sind noch darstellbar, im Schwingungsbauch (Bodenmitte), zu den Ecken hin kontinuierlich auf 3 bis 3,5 mm. Der Bereich des Radius selbst beträgt, wie aus der Tabelle hervorgeht, ca. 4,1 mm. Die gleiche Gestaltung kann auch auf die Wände 3 angewendet werden, ist jedoch in Fig. 2 nicht dargestellt. Die Eckenausrundungen weisen auch für diese Ausführung die Umkehrung auf, im Scheitelpunkt ist die Wandstärke größer (Innenradius Ri ist etwa doppelt so groß wie der Außenradius Ra).In this particularly preferred embodiment, the wall thickness of the bottom 4 changes starting from the production-related, supplier-specific minimum wall thickness of 2.3 mm, even 2 mm are still displayed in the antinode (bottom center), towards the corners continuously to 3 to 3.5 mm. The range of the radius itself is, as shown in the table, about 4.1 mm. The same design can also be applied to the walls 3, but is in Fig. 2 not shown. The Eckenausrundungen have the inversion for this version, in the vertex, the wall thickness is greater (inner radius R i is about twice as large as the outer radius R a ).

Die erfindungsgemäße Ausgestaltung der Schmiermittelwanne 1 bringt einen deutlichen Gewichtsvorteil, da bei gleichbleibender Steifigkeit auf zusätzliche Rippen verzichtet werden kann. Auch die Werkzeugkosten werden geringer. Der Materialfluss wird beim Gießen begünstigt, es ist kein zusätzücher Aufwand für eine zusätzliche Kühlung des Werkzeuges notwendig. Dies führt in vorteilhafter Weise zu einem geringeren Werkzeugabstimmbedarf und weniger Ausschuss. Vorzugsweise kommen für die Herstellung Gießverfahren wie Druckguss, Sandguss oder Spritzguss zur Anwendung.The inventive design of the lubricant pan 1 brings a significant weight advantage, since with constant stiffness can be dispensed with additional ribs. The tool costs are lower. The material flow is favored during casting, there is no additional overhead costs for additional cooling of the tool necessary. This leads advantageously to a lower tool tuning requirement and less rejects. Preferably, casting methods such as die casting, sand casting or injection molding are used for the production.

Ein Optimum für die erfindungsgemäße Schmiermittelwanne 1 wird erzielt, wenn der kontinuierliche Wandstärkenanstieg, wie in Fig. 2 dargestellt, diagonal (zu den Ecken) ausgeführt wird. Mit einem nicht dargestellten, kontinuierlichen Wandstärkenanstieg normal zu den Wänden, wird die Steifigkeit nochmals erhöht, aber auch gleichzeitig das Gewicht der Schmiermittelwanne 1.An optimum for the lubricant pan 1 according to the invention is achieved when the continuous wall thickness increase, as in Fig. 2 shown diagonally (to the corners). With a non-illustrated, continuous wall thickness increase normal to the walls, the stiffness is increased again, but also at the same time the weight of the lubricant pan. 1

In einer weiteren Ausführungsform können die Radien Ri und Ra auch als Fasen dargestellt werden, d. h. die Radien nehmen den Wert "unendlich" an.In a further embodiment, the radii R i and R a can also be represented as bevels, ie the radii assume the value "infinite".

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1.1.
Schmiermittelwannelubricant sump
2.Second
Montageflanschmounting flange
3.Third
Wandwall
4.4th
Bodenground
5.5th
Bodenmittebottom center
UU
geodätisch untengeodesic below
dd
Bodendickebottom thickness
Ri R i
Innenradiusinner radius
Ra R a
AußenradiüsAußenradiüs

Claims (8)

Schmiermittelwanne (1) für eine Brennkraftmaschine, mit einem Montageflansch (2) zur Befestigung der Schmiermittelwanne (1) an einem Kurbelgehäuse der Brennkraftmaschine, an den seitliche Wände (3) der Schmiermittelwanne (1) angeordnet sind, die in Einbaulage geodätisch unten (U) über einen Radius in einen Boden (4) übergehen,
dadurch gekennzeichnet, dass eine Bodendicke (d) von einer geometrischen Bodenmitte (5) in Richtung der Wände (3) kontinuierlich zunimmt, wobei ein Innenradius (Ri) am Übergang vom Boden (4) zu den Wänden (3) größer oder gleich groß ist wie ein korrespondierender Außenradius (Ra).Lubricant trough (1) for an internal combustion engine, with a mounting flange (2) for fastening the lubricant trough (1) to a crankcase of the internal combustion engine, on the lateral walls (3) of the lubricant trough (1) are arranged in the installation position geodetic down (U) pass over a radius into a ground (4),
characterized in that a bottom thickness (d) of a geometric bottom center (5) in the direction of the walls (3) continuously increases, wherein an inner radius (R i ) at the transition from the bottom (4) to the walls (3) is greater than or equal is like a corresponding outer radius (R a ). Schmiermittelwanne nach Patentanspruch 1,
dadurch gekennzeichnet, dass die Bodendicke (d) in der Bodenmitte (5) eine Wandstärke von mindestens 2 mm aufweist.Lubricant trough according to claim 1,
characterized in that the bottom thickness (d) in the bottom center (5) has a wall thickness of at least 2 mm. Schmiermittelwanne nach Patentanspruch 1 oder 2,
dadurch gekennzeichnet, dass die Bodendicke (d) am Übergang zum Radius eine Wandstärke von maximal 10 mm aufweist.Lubricant tray according to claim 1 or 2,
characterized in that the bottom thickness (d) at the transition to the radius has a maximum wall thickness of 10 mm. Schmiermittelwanne einem der Patentansprüche 1 bis 3,
dadurch gekennzeichnet, dass ein Außenradius (Ra) mindestens 3 mm beträgt.Lubricant trough of one of the claims 1 to 3,
characterized in that an outer radius (R a ) is at least 3 mm. Schmiermittelwanne nach einem der Patentansprüche 1 bis 4,
dadurch gekennzeichnet, dass ein Innenradius (Ri) bevorzugt den doppelten Außenradius und mindestens 6 mm beträgt.Lubricant trough according to one of the claims 1 to 4,
characterized in that an inner radius (R i ) is preferably twice the outer radius and at least 6 mm. Schmiermittelwanne nach einem der Patentansprüche 1 bis 5,
dadurch gekennzeichnet, dass die Wände (3) eine Geometrie entsprechend dem Boden (4) aufweisen.Lubricant trough according to one of the claims 1 to 5,
characterized in that the walls (3) have a geometry corresponding to the bottom (4). Schmiermittelwanne nach einem der Patentansprüche 1 bis 6,
dadurch gekennzeichnet, dass die Schmiermittelwanne (1) ein Gussteil ist.Lubricant trough according to one of the claims 1 to 6,
characterized in that the lubricant trough (1) is a casting. Schmiermittelwanne nach Patentanspruch 7,
dadurch gekennzeichnet, dass die Schmiermittelwanne (1) ein Druckgussteil oder ein Sandgussteil oder ein Spritzgussteil ist.Lubricant tray according to claim 7,
characterized in that the lubricant trough (1) is a die casting or a sand casting or an injection molded part.
EP20120159571 2011-04-18 2012-03-15 Lubrication tray for a combustion engine Active EP2514934B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011007567A DE102011007567A1 (en) 2011-04-18 2011-04-18 Lubricant pan for an internal combustion engine

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Publication Number Publication Date
EP2514934A1 true EP2514934A1 (en) 2012-10-24
EP2514934B1 EP2514934B1 (en) 2014-10-01

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DE (1) DE102011007567A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232602A1 (en) 1982-09-02 1984-03-08 Walker Deutschland GmbH Fahrzeugteile Division, 6800 Mannheim Deep-drawn sheet-steel engine parts
DE4009688A1 (en) 1989-04-26 1990-10-31 Avl Verbrennungskraft Messtech Cover for IC engine cylinder head - has thickness of cover wall increased in edge region
DE4014788C1 (en) 1990-05-09 1991-03-14 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De
US6041751A (en) * 1997-01-13 2000-03-28 Nissan Motor Co., Ltd. Oil pan of internal combustion engine
DE10302191A1 (en) 2003-01-20 2004-08-05 Carcoustics Tech Center Gmbh Acoustically effective oil casing especially for a motor vehicle engine gear includes a multilayer of plastic sandwiched between metal layers
EP1816321A1 (en) * 2006-01-21 2007-08-08 Joma-Polytec Kunststofftechnik GmbH Oil sump for combustion engine
GB2451326A (en) * 2007-07-26 2009-01-28 Ford Global Tech Llc I.c. engine oil pan with oil flow tunnel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004025450A1 (en) * 2004-05-19 2005-12-22 Joma-Polytec Kunststofftechnik Gmbh Oil pan for an engine and / or a transmission

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232602A1 (en) 1982-09-02 1984-03-08 Walker Deutschland GmbH Fahrzeugteile Division, 6800 Mannheim Deep-drawn sheet-steel engine parts
DE4009688A1 (en) 1989-04-26 1990-10-31 Avl Verbrennungskraft Messtech Cover for IC engine cylinder head - has thickness of cover wall increased in edge region
DE4014788C1 (en) 1990-05-09 1991-03-14 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De
US6041751A (en) * 1997-01-13 2000-03-28 Nissan Motor Co., Ltd. Oil pan of internal combustion engine
DE10302191A1 (en) 2003-01-20 2004-08-05 Carcoustics Tech Center Gmbh Acoustically effective oil casing especially for a motor vehicle engine gear includes a multilayer of plastic sandwiched between metal layers
EP1816321A1 (en) * 2006-01-21 2007-08-08 Joma-Polytec Kunststofftechnik GmbH Oil sump for combustion engine
GB2451326A (en) * 2007-07-26 2009-01-28 Ford Global Tech Llc I.c. engine oil pan with oil flow tunnel

Also Published As

Publication number Publication date
EP2514934B1 (en) 2014-10-01
DE102011007567A1 (en) 2012-10-18

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