EP4045775A1 - Ölwanne für kraftfahrzeuge mit zusätzlichen verbindungspunkten - Google Patents
Ölwanne für kraftfahrzeuge mit zusätzlichen verbindungspunktenInfo
- Publication number
- EP4045775A1 EP4045775A1 EP20772256.2A EP20772256A EP4045775A1 EP 4045775 A1 EP4045775 A1 EP 4045775A1 EP 20772256 A EP20772256 A EP 20772256A EP 4045775 A1 EP4045775 A1 EP 4045775A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- oil pan
- pan
- connecting means
- edge
- 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
Links
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
- F01M2011/0008—Oilsumps with means for reducing vibrations
-
- 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
- F01M2011/0087—Sump being made of different parts
Definitions
- the present invention relates to a two-part oil pan for an internal combustion engine.
- Oil pans are known in numerous embodiments and are used, for example, in internal combustion engines or transmissions. There they are used to take up and hold the amount of oil required for the lubrication of the internal combustion engine or the transmission.
- the lubrication system usually has an oil pump that conveys the lubricating oil from the oil pan into a lubrication circuit. After running through the lubrication circuit, the circulating oil is then usually collected again in the oil pan. The return mostly occurs as a result of the force of gravity acting on the oil. For this reason, oil pans in internal combustion engines are usually arranged below a crankcase. Often, oil pans are also designed as a one-piece sheet metal or cast part. However, there are also z. B. two-part oil pans known.
- an oil pan for motor vehicles with front-wheel or all-wheel drive which has an upper part designed as a cast part, on which a transmission axis feedthrough is formed in one piece, and a lower part flanged to the upper part.
- One long side of the upper part is provided with bores for receiving screws with which a front axle drive can be fastened.
- the other long side of the upper part is provided with bores for receiving screws with which a quick-release axle bearing block can be attached.
- the upper part is box-like and designed in the predominant area of its underside to be open or without a bottom. In this case, in the area of the upper part that has no bottom, struts extending in the transverse direction are arranged, which are connected to the side walls of the upper part.
- the acoustic behavior of the oil pans can still be improved.
- structure-borne sound vibrations and / or air-borne sound vibrations are radiated to the outside from an oil interior enclosed by the crankcase and the oil pan, in particular via the oil pan.
- components mounted in the oil pan in practice completely or partially completely surrounded by oil, typically conduct structure-borne noise via their connection points into the oil pan during operation, or the sound is transmitted via the oil located between the component and the oil pan inner wall.
- the object of the present invention is therefore to provide an oil pan which has improved acoustic behavior.
- a two-part oil pan for an internal combustion engine having a box section and a pan section, the pan section forming a bottom of the oil pan and the box section forming a pan wall of the oil pan, the box section and the pan section having a circumferential edge with a first circumferential edge Sealing surface on the tub section and a circumferential second sealing surface on the box section are tightly connected to one another with first connecting means, the tub section and the box section being additionally connected to one another with at least one second connecting means, which is arranged within the edge and also at a distance from this edge .
- the two-part oil pan is designed for use on a crankcase of an internal combustion engine, the oil pan having a pan section (at the bottom in the installation situation) with a base and an edge adjoining it (at the top in the installation situation).
- the tub section has an opening aligned with a box section arranged above it and having a first sealing surface, the sealing surface preferably being arranged on an upper side of the edge.
- the box section has a second sealing surface on an underside, the first sealing surface of the trough section and the second sealing surface of the box section being shaped complementary to one another, so that in the assembled state they tightly enclose an oil interior.
- “Complementary” in this context means in particular that the sealing surfaces z. B. have a shape, width, etc., so that they prevent the passage of oil when they are in contact with one another.
- the box section forms a pan wall which extends upwards from the bottom of the oil pan.
- first connecting means for connecting the edge of the tub section to the box section and at least one additional second connecting means for Connection of the bottom of the tub section provided with the box section, the second connecting means being arranged within the edge and also at a distance from this edge.
- First connecting means are preferably arranged distributed along the edge, for example in the form of screw connections.
- connecting means is used below, whereby one or more components of a respective connecting means are meant.
- a connecting means can consist of a screw, a threaded section in the box section and a bore in the tub section. If, for example, only the hole and one screw are shown in a figure, these are still referred to as the first or second connecting means.
- the connecting means can also be referred to as a connecting element, connecting device or the like.
- up and down relate to the vertical direction and are to be understood in the sense of vertically up and vertically down, with reference being made to the usual installation position of the oil pan below an internal combustion engine in a motor vehicle. Accordingly, the term “laterally” is to be understood in the sense of horizontally from the side.
- the bottom is to be understood as the section of the pan section which is arranged below and which closes off the oil pan at the bottom in an oil-tight manner.
- the edge is the section of the pan section which laterally closes off the oil pan in an oil-tight manner.
- the box section or the pan wall of the oil pan formed by the box section adjoins the edge, which also closes the oil pan off in an oil-tight manner.
- An advantageous stiffening of the tub section is achieved in this way.
- An arrangement of the second connecting means “within the edge” in this context means in particular that the edge surrounds an inner surface through which the second connecting means (or local projections forming / receiving them) Bottom or box section) protrudes.
- Positioning at a distance expresses in particular that (if you look at this inner surface enclosed by the edge) there is a gap, free space, etc. between the edge and the second connecting means, i.e. no direct or merging contact is made between the edge and the second connecting means is.
- the tub section is thus connected to the box section via its edge and the first connecting means and additionally via the bottom and the second connecting means.
- undesirable vibrations in the bottom of the tub section, especially in its center can be effectively avoided.
- the improvement in acoustic properties achieved by the present invention is greater, the greater the distance between the second connecting means and the edge of the trough section and the more second connecting means are used.
- the second connecting means fundamentally changes the natural frequency of the mounted tub section in such a way that it is significantly increased. The increase in the natural frequency then leads to the fact that sound vibrations radiated from the oil interior are no longer or only to a significantly reduced extent emitted into the environment via the two-part oil pan.
- Superimposed on the overall increase in the natural frequency of the system there is an advantageous breakdown of central excitation points in specific frequency ranges. The aim is to derive the vibration energy from several points in the system instead of at one point.
- the oil volume enclosed by the oil pan can advantageously also be varied simply by varying the height of the box section and thus also the height of the pan wall.
- the box section can be designed in such a way that it also accommodates additional components, such as, for example, drive devices for front-wheel drive or all-wheel drive.
- the oil pan is particularly preferred if the box section has at least one cross strut that connects two spaced apart areas of the pan wall, the pan section and the box section being connected to one another on the cross strut with the second connecting means.
- the box section can be stiffened, for example, with cross struts which have so-called screw studs in order to provide a screw connection to the floor of the tub section.
- the cross struts can contribute to the additional mechanical stiffening of the two-part oil pan and prevent twisting of the oil pan during ferry operation.
- first sealing means can also be provided on the first sealing surface between the box section and the trough section. These first sealing means ensure that the circumferential edge between the box section and the tub section are reliably sealed.
- additional second sealing means for sealing the floor can be provided on the second connecting means.
- These second sealing means ensure that the area of the floor on which the second sealing means is arranged is also tightly closed so that no oil can escape from the oil interior.
- the distance between the second connecting means and the edge measured in the orthogonal direction from an inside of the edge, can also be selected such that it is at least 20 mm [millimeters], preferably at least 100 mm. If a second connecting means is arranged at this minimum distance or a greater distance from the edge, significant increases in the natural frequency of the oil pan or the wall section or the floor can be achieved and thus the acoustic properties are also significantly improved to the effect that the sound radiation is reduced.
- the distance proposed here is preferably a minimum distance to the closest section of the edge; In other words, that means that the distance is preferably not smaller than any other section of the edge (if one considers the inner cross-section or the above-mentioned inner surface at the level of the edge).
- the second connecting means can be arranged within a radius R around a center of area of the bottom of the trough section.
- the centroid is the geometric centroid of the soil. In the case of particularly simple geometries, such as a circle or a square, the centroid is exactly in the center of the floor. In practice, however, oil pans often have more complex geometries. In this case, it is possible to project the edge of the tub section onto a plane which is orthogonal to the edge, preferably horizontally, and to determine the centroid on the basis of the area enclosed by the projected edge. Normally, this plane is a horizontal plane, because the oil due to gravity from the crankcase in a vertical direction downwards flows back into the oil pan and therefore the edges of the oil pan or the pan sections extend essentially in the vertical direction.
- At least one second fastening means then lies in the area of this centroid, which can also be referred to as the center.
- a plurality of second fastening means can also be arranged in an area around the center of area if there is insufficient installation space available there.
- the center of gravity or the center is particularly advantageous as a positioning aid for the second connecting means, since the greatest vibration amplitudes of the vibrating floor are to be expected there.
- internal combustion engines can be equipped with a two-part oil pan as described. These internal combustion engines then have a lower emission of noise, since the emission of noise via the oil pan is significantly reduced.
- an oil pan can also be used on other occasions. For example, with gear units that have their own lubrication systems.
- separate and two-part oil pans according to the invention can also contribute to a significant improvement in the acoustic properties.
- motor vehicles can be equipped with an internal combustion engine as described, these vehicles requiring no or only significantly reduced insulation measures in the area of the engine due to the lower noise emission. This allows cost savings and weight savings to be achieved at the same time.
- first”, “second”, ...) primarily (only) serve to differentiate between several similar objects, sizes or processes, so in particular no dependency and / or sequence of these objects, sizes or prescribe processes to each other. Should a dependency and / or sequence be required, this is explicitly stated here or it is obvious to a person skilled in the art when studying the specifically described embodiment.
- FIG. 2 a vertical sectional view through the oil pan according to FIG. 1;
- a two-part oil pan 1 according to the prior art is shown in an oblique view.
- This consists of an upper box section 2 and a lower trough section 3.
- the trough section 3 has a base 4, an edge 5 laterally surrounding the base 4 and a first sealing surface 6.
- the box section 2 forms a circumferential tub wall 18 and a second sealing surface 12.
- a large number of bores 7 are provided through which the tub section 3 is connected to the box section 2 with the aid of first connecting means 8, which can be designed as screws can be.
- the bottom 4 of the trough section 3 extends essentially in a horizontal plane which is aligned parallel to the X-Y plane of the specified coordinate system.
- FIG. 2 shows a vertical sectional view of the two-part oil pan 1 according to FIG. 1 with the box section 2 lying above with the tub wall 18 and an opening 16 which is closed by the tub section 3 lying below.
- the bottom 4 of the trough section 3 is oriented essentially horizontally and its edge 5 is essentially vertical, ie parallel to the illustrated Z-direction.
- the connection of the tub section 3 to the Box section 2 takes place exclusively via first connecting means 8 which are arranged along the circumferential edge 5.
- a central area of the bottom 4 of the trough section 3 can thus oscillate relatively freely, similar to a membrane.
- a pan section 3 for an oil pan according to the invention is shown in an oblique view from above.
- the tub section 3 has a circumferential edge 5 with a first sealing surface 6, a multiplicity of first connecting means 8 being arranged along the edge 5.
- this trough section 3 also has two second connecting means 9, which are each arranged at a distance A from the edge 5. As shown, the distance A from the edge 5 is measured in the orthogonal direction to the inwardly directed surface of the edge 5.
- FIG. 4 shows a vertical sectional view through the oil pan 1 according to the invention, the two second connecting means 9 being cut.
- the oil pan 1 is formed by the box section 2 and the pan section 3, which are connected to one another via the first connecting means 8 and additionally via the second connecting means 9.
- the bottom 4 formed by the tub section 3, the edge 5 and the tub wall 18 formed by the box section 2 can be seen.
- the box section 2 has two screw studs 10 into which the screws 11 are screwed through the bores 7 can be.
- the second connecting means 9 or the screw studs 10 are arranged on a cross strut 17 which connects regions 19 of the tub wall 18 that are spaced apart from one another.
- the cross strut 17 stiffens the oil pan 1.
- a first sealing means 13 (not shown in detail) is arranged, which seals the oil pan 1 in an oil-tight manner.
- second sealing means 14 are provided on the second connecting means 9 in order to also seal off these areas from the outside in an oil-tight manner.
- FIG. 5 shows a tub section 3 according to the invention in an oblique view from below, the first connecting means 8 and the second connecting means 9 being visible. It can be clearly seen here that the second connecting means 9 are to be arranged as spaced apart (as far) as possible from the edge 5.
- FIG. 6 shows the oil pan 1 according to the invention in an oblique view, the box section 2 being shown separated from the pan section 3 in the vertical direction, ie in the Z direction.
- the tub section 3 forms the bottom 4 with the edge 5 and the box section 2 forms the tub wall 18 with the opening 16, which is closed by the bottom 4 or by the tub section 3.
- the box section 3 has a flange surface 15 to which a crankcase, not shown, of an internal combustion engine can be flange-mounted.
- the additional connection of the pan section 3 to the box section 2 with the second connecting means 9 has a positive effect on the acoustic properties of the oil pan 1.
- the oil pan 1 can thus be substantially stiffened by the additional second connecting means 9.
- the oil pan 1 thus undergoes significantly less deformation in the event of a load or, depending on the application, can also be dimensioned smaller and thus lighter.
- a weight saving can be realized since fewer sound insulation measures are required on the vehicle side.
- the number of first connecting means 8 required in the region of the edge 5 can also be reduced, since some of the forces are transmitted via the second connecting means 9.
- FIG. 7 uses a graph to show the measured improvements in the acoustic properties due to the invention compared to oil pans without a second connecting means.
- the frequency measured in each case is plotted in Hertz on the horizontal axis and the sound power in watts on the vertical axis.
- the vertical axis is also logarithmically increasing.
- the bar plotted on the left for each frequency shows the measured values of a tub section 3 which is designed according to the prior art.
- To the right of this are the measured values of a tub section 3, which is designed according to the present invention. It can be clearly seen here that the sound power levels of the tub section formed according to the invention with second connecting means are significantly lower than the sound power levels of a tub section designed according to the prior art.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019127874.0A DE102019127874A1 (de) | 2019-10-16 | 2019-10-16 | Ölwanne für Kraftfahrzeuge mit zusätzlichen Verbindungspunkten |
| PCT/EP2020/075602 WO2021073814A1 (de) | 2019-10-16 | 2020-09-14 | Ölwanne für kraftfahrzeuge mit zusätzlichen verbindungspunkten |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4045775A1 true EP4045775A1 (de) | 2022-08-24 |
| EP4045775B1 EP4045775B1 (de) | 2023-11-01 |
Family
ID=72521604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20772256.2A Active EP4045775B1 (de) | 2019-10-16 | 2020-09-14 | Ölwanne für kraftfahrzeuge mit zusätzlichen verbindungspunkten |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11788444B2 (de) |
| EP (1) | EP4045775B1 (de) |
| CN (1) | CN114270018B (de) |
| DE (1) | DE102019127874A1 (de) |
| WO (1) | WO2021073814A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024004305B3 (de) | 2024-12-18 | 2026-03-26 | Mercedes-Benz Group AG | Ölwanne für eine Verbrennungskraftmaschine eines Kraftfahrzeugs sowie Kraftfahrzeug |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT378408B (de) * | 1980-02-13 | 1985-08-12 | Steyr Daimler Puch Ag | Hubkolben-brennkraftmaschine |
| DE3520176C1 (en) * | 1985-06-05 | 1987-01-22 | Audi Ag | Reciprocating piston internal combustion engine |
| DE202005009096U1 (de) * | 2005-06-09 | 2006-10-26 | Mann + Hummel Gmbh | Ölwanne, insbesndere für eine Brennkraftmaschine |
| US7204224B2 (en) * | 2005-09-13 | 2007-04-17 | Gm Global Technology Operations, Inc. | Engine block structure |
| DE102006003664B4 (de) * | 2006-01-26 | 2021-07-29 | Bayerische Motoren Werke Aktiengesellschaft | Ölwanne für Kraftfahrzeuge mit Vorderrad- oder Allradantrieb |
| DE102007040665A1 (de) * | 2007-08-27 | 2009-03-05 | Mann + Hummel Gmbh | Ölwanne |
| DE102008048793A1 (de) * | 2008-09-24 | 2010-03-25 | Mann + Hummel Gmbh | Verfahren zur Herstellung einer Kunststoffölwanne mittels Heißgasschweißen |
| DE102009055138B4 (de) * | 2009-12-22 | 2020-03-05 | Elringklinger Ag | Ölwanne mit einem nach oben versetzten Bodenabschnitt |
| DE102011114352A1 (de) * | 2011-09-27 | 2013-03-28 | Mann + Hummel Gmbh | Verbindungsvorrichtung zur Verbindung von zwei Gehäuseteilen einer Brennkraftmaschine |
| WO2014041685A1 (ja) * | 2012-09-14 | 2014-03-20 | ヤンマー株式会社 | エンジン装置 |
| JP5939943B2 (ja) * | 2012-09-14 | 2016-06-22 | ヤンマー株式会社 | エンジン装置 |
| DE102013204157A1 (de) * | 2013-03-11 | 2014-09-11 | Elringklinger Ag | Kunststoffbehälter |
-
2019
- 2019-10-16 DE DE102019127874.0A patent/DE102019127874A1/de not_active Withdrawn
-
2020
- 2020-09-14 WO PCT/EP2020/075602 patent/WO2021073814A1/de not_active Ceased
- 2020-09-14 CN CN202080059557.6A patent/CN114270018B/zh active Active
- 2020-09-14 EP EP20772256.2A patent/EP4045775B1/de active Active
- 2020-09-14 US US17/633,621 patent/US11788444B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US11788444B2 (en) | 2023-10-17 |
| DE102019127874A1 (de) | 2021-04-22 |
| CN114270018B (zh) | 2024-04-26 |
| US20220316369A1 (en) | 2022-10-06 |
| CN114270018A (zh) | 2022-04-01 |
| EP4045775B1 (de) | 2023-11-01 |
| WO2021073814A1 (de) | 2021-04-22 |
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