EP0416297A1 - Noise damped sheet oil sump for an internal combustion engine - Google Patents

Noise damped sheet oil sump for an internal combustion engine Download PDF

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Publication number
EP0416297A1
EP0416297A1 EP90115073A EP90115073A EP0416297A1 EP 0416297 A1 EP0416297 A1 EP 0416297A1 EP 90115073 A EP90115073 A EP 90115073A EP 90115073 A EP90115073 A EP 90115073A EP 0416297 A1 EP0416297 A1 EP 0416297A1
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EP
European Patent Office
Prior art keywords
oil pan
overpan
sound
elastomeric element
oil
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
EP90115073A
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German (de)
French (fr)
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EP0416297B1 (en
Inventor
Heribert Dipl.-Ing. Kubis
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge AG
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Filing date
Publication date
Application filed by MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Priority to AT90115073T priority Critical patent/ATE81187T1/en
Publication of EP0416297A1 publication Critical patent/EP0416297A1/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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • 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
    • F01M2011/0054—Fastening to the cylinder block
    • 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
    • F01M2011/0062—Gaskets

Definitions

  • the invention relates to a soundproof sheet oil pan for internal combustion engines according to the generic term.
  • a source of sound emission is a mostly insufficiently soundproofed oil pan.
  • To improve the structure-borne sound insulation it is known to design the oil pan in two or more layers, or to reduce the sound emission of this oil pan by using plastic as the material for the oil pan. In order to prevent sound bridges between the crankcase and the oil pan, it is known to insert elastomers between the two parts.
  • the invention has for its object to reduce the structure-borne noise from oil pans significantly and with reasonable effort.
  • the structure-borne noise is noticeably reduced by the over-tub with reasonable effort.
  • Motors with oil sumps with reduced structure-borne noise insulation can be retrofitted in a relatively simple and inexpensive manner.
  • the overpan can be designed in two or more layers in sheet steel.
  • the overpan can be constructed in multi-layer steel sheet or also in one layer in plastic.
  • Multi-layer steel sheet provides high noise insulation and is also inexpensive.
  • the plastic version provides good sound insulation through internal damping of the material even in one layer.
  • Figure 1 shows an oil pan 1, which closes a crankcase 2 at the bottom.
  • the oil pan 1 is fastened to a circumferential flange 4 of the crankcase 2 by means of screws 3.
  • a seal 1a (not shown in detail) (FIG. 2) between the oil pan 1 and crankcase 2 over the entire circumference with the same Surface pressure is pressed against the flange 4 to guarantee oil tightness.
  • the oil pan 1 is approximately equidistantly surrounded by an overpan 7, which can be made either in plastic or in sheet steel in deep-drawing quality. Dag sheet steel can be designed in one or two or more layers depending on the requirements for sound insulation.
  • the overpan 7 is connected at all points of contact with the oil pan 1 or the crankcase 2 by structure-borne noise decoupled by elastomeric elements.
  • an L-shaped profile 8 is provided on the upper edge of the overpan 7, in which an upwardly open first elastomeric element 9 is inserted.
  • the overpan 7 is compared to a flywheel housing 10 as one Part of the crankcase 2 sealed against sound leakage via a second elastomeric element 11.
  • the second elastomeric element 11 is open on one side and is pushed over the edge of the overpan 7 and pressed against the flywheel housing 10.
  • the oil pan 1 has a drain plug 12 at its lowest point.
  • the drain plug 12 or its threaded part 13 is sealed against the over-tub 7 by means of a third elastomeric element 14 against sound leakage.
  • FIG. 2 shows a cross section II-II through the oil pan 1.
  • the oil pan 1 is pressed against the flange 4 of the crankcase 2 by means of the screws 3 with the interposition of a seal 1a.
  • the oil pan 1 is surrounded equidistantly by the overpan 7.
  • the flange of the oil pan 1 is flanged on the outside.
  • a leg 1b engages from above into the first elastomeric element 9, which is open at the top.
  • Other elements of the oil pan 1, such as the drain plug 12, a nozzle 15 for the oil filler and sheet metal caps 16, which serve as a support for the engine, are sealed at the points of contact by further elastomeric elements to the upper pan 7 against sound leakage. Details of the design of these elastomeric connecting elements are shown in the following figures.
  • FIG. 3 A connection of the oil pan 1 and the overpan 7 made of plastic is shown in FIG. 3.
  • the overpan 7 has retaining lugs 17, the oil pan 1 has, under the screws 3 used for fastening the overpan 7, specially shaped underlays 18, and both parts are non-positively connected by spring wire clips 19.
  • a seal against airborne noise and a decoupling from structure-borne noise is achieved by the first elastomeric element 9.
  • FIG 4 the sound seal of the opening for the drain plug 12 is shown in detail.
  • the drain plug 12 is screwed into a threaded part 13, which is oil-tight in the Oil pan 1 is inserted.
  • the threaded part 13 is connected to the overpan 7 by the third elastomeric element 14, which is sealed against the threaded part 13 by an annular sealing lip 20 to prevent airborne noise from escaping.
  • the sealing against the overpan 7 takes place by means of an annular groove 21, which sealingly encompasses a bore in the overpan 7.
  • Figure 5 shows in detail the sound seal of the sheet metal cap 16, which is connected to the oil pan 1 by spot welding or the like.
  • a fourth elastomeric element 22 is provided for sealing, which is almost identical in construction to the third elastomeric element 14, which is why it will not be explained in more detail.
  • FIG 6 the sound seal of the nozzle 15 is shown, which is used for oil filling.
  • the nozzle 15 is sealed at its upper end with a fifth elastomeric element 23 against the overpan 7.
  • This elastomeric element 23 is similar to the elastomeric elements 14 and 22.
  • the connector 15 is screwed into the oil pan 1 in the soldered-in threaded insert 24 in an oil-tight manner.
  • the connection piece for the oil measuring tube in the oil pan and its soundproofing are also fixed analogously to the overpan 7.
  • FIG. 8 A detail of the profile bridge 6 according to a section VII-VII from FIG. 8 is shown in FIG. Since the upper edge of the oil pan 1 cannot be flanged in a U-shape in the area of the vibration damper 5, so that the leg 1b is omitted here, the profile bridge 6 is provided for evenly pressing the seal 1a (FIG. 2), which has the necessary bending rigidity to evenly distribute the contact pressure of the screws 3 as a line load over the face of the oil pan gasket.
  • the seal 1a FIG. 2
  • a U-shaped profile 25 is provided on the top thereof in order to receive the first elastomeric element 9.
  • the profile bridge 6 has a nose 26 into which the first elastomeric element 9, which is open at the top, is inserted.
  • FIG. 7 The area shown in section in FIG. 7 is shown in plan view in FIG.
  • FIG. 9 shows in detail the sound seal of the overpan 7 with respect to the flywheel housing 10.
  • the overpan 7 is open in the direction of the flywheel housing 10 and ends here in a web 7a. This is sealed against the flywheel housing 10 by the second elastomeric element 11.
  • this second elastomeric element 11 is angled in the region of the oil pan flange and ends on the right and left side in the mirror-image-shaped two legs 29 which face the web sections 30 facing the oil pan flange of the crankcase 2 on the right and left sides the tub 7 are attached.
  • the two legs 29 each have an extension resting on a support surface 31 (FIG.
  • FIG. 11 shows the connection between the overpan 7 and the oil pan 1. Since the overpan 7 is made of sheet steel in the example shown, it is essential to provide acoustic decoupling.
  • the connection is made by spring wire clips 19. These spring wire clips 19 are connected to at least one contact point (here with the oil pan 1) with the interposition of a sixth elastomeric element 32. The other end can be connected directly to a nose 33 which is connected to the overpan 7. Alternatively, the element 32 can also rest on a special screw support 18 according to FIG. 3.
  • Figure 12 shows the same detail as shown in Figure 10, but related to a version in sheet steel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubricants (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to an oil sump damped against structure-borne noise. Since higher requirements are being made of the reduction in the emission of noise from internal combustion engines, the invention proposes to surround the oil sump (1) with a sump cover (7), the sump cover being made of a single or multiple layer of plastics or steel sheet. To avoid sound bridges, the oil sump (1) and the sump cover (7) are separated by elastomeric elements (9, 11, 14, 22, 23, 32). The sump cover provides an economical means of increasing the noise damping. A sump cover can also be retrofitted to engines.

Description

Die Erfindung bezieht sich auf eine schallgedämmte Blech-Öl­wanne für Brennkraftmaschinen gemäß dem Gattungsbegriff.The invention relates to a soundproof sheet oil pan for internal combustion engines according to the generic term.

Die Anforderungen an eine Reduzierung der Schallemission von Brennkraftmaschinen sind stetig angestiegen. Eine Quelle der Schallemission ist eine meist ungenügend schallgedämmte Öl­wanne. Zur Verbesserung der Körperschalldämmung ist es be­kannt, die Ölwanne zwei- oder mehrlagig auszuführen, bzw. durch Verwendung von Kunststoff als Werkstoff für die Ölwanne die Schallemission dieser Ölwanne zu reduzieren. Um Schall­brücken zwischen Kurbelgehäuse und der Ölwanne zu unterbinden, ist es bekannt, zwischen beide Teile Elastomere einzulegen.The requirements for reducing the noise emission of internal combustion engines have risen steadily. A source of sound emission is a mostly insufficiently soundproofed oil pan. To improve the structure-borne sound insulation, it is known to design the oil pan in two or more layers, or to reduce the sound emission of this oil pan by using plastic as the material for the oil pan. In order to prevent sound bridges between the crankcase and the oil pan, it is known to insert elastomers between the two parts.

Es ist ferner durch DE-OS 34 27 529 bekannt, die Ölwanne und das Kurbelgehäuse mittels Federbügel zu verbinden, wobei zur Körperschallentkopplung die Bügel mit Elastomerlagen unterlegt sind.It is also known from DE-OS 34 27 529 to connect the oil pan and the crankcase by means of spring clips, the clips being underlaid with elastomer layers to isolate structure-borne noise.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, die Körperschallemission von Ölwannen wesentlich und mit ver­tretbarem Aufwand zu reduzieren.In contrast, the invention has for its object to reduce the structure-borne noise from oil pans significantly and with reasonable effort.

Gelöst wird diese Aufgabe gemäß den kennzeichnenden Merkmalen des Patentanspruches 1.This object is achieved in accordance with the characterizing features of patent claim 1.

Die Körperschallemission wird durch die Überwanne mit vertret­barem Aufwand spürbar reduziert. Motoren mit Ölwannen minderer Körperschalldämmung können in relativ einfacher und kostengün­stiger Weise nachgerüstet werden. Um die Körperschalldämmung nicht durch die Bildung von Schallbrücken zu beeinträchtigen wird erf indungsgemäß vorgeschlagen, alle Berührungsstellen durch Einlage von Elastomeren zu trennen.The structure-borne noise is noticeably reduced by the over-tub with reasonable effort. Motors with oil sumps with reduced structure-borne noise insulation can be retrofitted in a relatively simple and inexpensive manner. In order not to impair the structure-borne sound insulation by the formation of sound bridges, it is proposed according to the invention to separate all contact points by inserting elastomers.

Die Überwanne kann bei erhöhten Anforderungen an die Schall­dämmung in zwei- oder mehrlagiger Ausführung in Stahlblech ausgeführt sein.In the case of increased demands on sound insulation, the overpan can be designed in two or more layers in sheet steel.

Vorteilhafte Weiterbildungen der Erfindung können den Unteran­sprüchen 2 bis 9 entnommen werden.Advantageous developments of the invention can be found in subclaims 2 to 9.

Durch die systematische Trennung von Berührungsstellen von Ölwanne und Überwanne sowie Überwanne und Schwungradgehäuse durch elastomere Übergänge werden Schallbrücken vermieden, was zu einer weiteren Reduzierung der Schallemission beiträgt.The systematic separation of points of contact between the oil pan and overpan as well as the overpan and flywheel housing by means of elastomeric transitions prevents sound bridges, which contributes to a further reduction in noise emissions.

Die Überwanne kann erfindungsgemäß in mehrlagigem Stahlblech oder auch einlagig in Kunststoff ausgeführt sein.According to the invention, the overpan can be constructed in multi-layer steel sheet or also in one layer in plastic.

Mehrlagiges Stahlblech ergibt eine hohe Geräuschdämmung und ist zudem preiswert. Die Kunststoffausführung ergibt bereits bei einer Lage eine gute Schalldämmung durch innere Dämpfung des Materials.Multi-layer steel sheet provides high noise insulation and is also inexpensive. The plastic version provides good sound insulation through internal damping of the material even in one layer.

Ausführungsbeispiele der Erfindung sind in Zeichnungen darge­stellt. Es zeigt:

  • Figur 1 einen Längs schnitt I-I durch Kurbelgehäuse und Ölwanne
  • Figur 2 einen Querschnitt II-II durch Kurbelgehäuse und Ölwanne
  • Figur 3 eine Ausführung einer Überwanne in Kunststoff mit Befestigung an der Ölwanne
  • Figur 4 eine Schall-Abdichtung einer Ablaßschraube
  • Figur 5 eine Schall-Abdichtung einer Blechkalotte
  • Figur 6 eine Durchführung eines Stutzens für die Öleinfüllung
  • Figur 7 einen Schnitt VII-VII als Verbindung der Überwanne mit der Ölwanne im Bereich des dämpferseitigen Endes des Kurbelgehäuses
  • Figur 8 eine Draufsicht auf die Oberseite der Ölwanne
  • Figur 9 ein Detail der Abdichtung zwischen Überwanne und schwungradseitigem Ende des Kurbelgehäuses
  • Figur 10 ein Detail der Abdichtung zwischen Überwanne und schwungradseitigem Ende des Kurbelgehäuses als Schnitt X-X
  • Figur 11 eine Ausführung der Überwanne in Stahlblech mit Befestigung an der Ölwanne
  • Figur 12 ein Detail der Abdichtung zwischen Überwanne und schwungradseitigem Ende des Kurbelgehäuses analog Figur 10, jedoch Ausführung in Stahlblech
Embodiments of the invention are shown in drawings. It shows:
  • Figure 1 shows a longitudinal section II through the crankcase and oil pan
  • Figure 2 shows a cross section II-II through the crankcase and oil pan
  • Figure 3 shows an embodiment of an overpan in plastic with attachment to the oil pan
  • Figure 4 is a sound seal of a drain plug
  • Figure 5 is a sound seal of a sheet metal dome
  • Figure 6 shows a nozzle for oil filling
  • Figure 7 shows a section VII-VII as a connection of the overpan with the oil pan in the region of the damper end of the crankcase
  • Figure 8 is a plan view of the top of the oil pan
  • Figure 9 shows a detail of the seal between the overpan and the flywheel end of the crankcase
  • Figure 10 shows a detail of the seal between the tub and flywheel end of the crankcase as section XX
  • Figure 11 is an execution of the overpan in sheet steel with attachment to the oil pan
  • Figure 12 shows a detail of the seal between the overpan and the flywheel end of the crankcase analogous to Figure 10, but made of sheet steel

Figur 1 zeigt eine Ölwanne 1, welche ein Kurbelgehäuse 2 nach unten abschließt. Die Ölwanne 1 ist mittels Schrauben 3 an einem umlaufenden Flansch 4 des Kurbelgehäuses 2 befestigt. Zur Erhöhung der Biegesteifigkeit des Flansches der Ölwanne 1 wird dessen äußerer Rand umgebördelt, so daß die Anpreßkraft der Schrauben 3 gleichmäßig über den Umfang verteilt wird und eine nicht näher dargestellte Dichtung 1a (Figur 2) zwischen Ölwanne 1 und Kurbelgehäuse 2 am ganzen Umfang mit gleicher Flächenpressung an den Flansch 4 angepreßt wird, um Öldicht­heit zu garantieren.Figure 1 shows an oil pan 1, which closes a crankcase 2 at the bottom. The oil pan 1 is fastened to a circumferential flange 4 of the crankcase 2 by means of screws 3. To increase the bending stiffness of the flange of the oil pan 1, its outer edge is flanged, so that the contact pressure of the screws 3 is evenly distributed over the circumference and a seal 1a (not shown in detail) (FIG. 2) between the oil pan 1 and crankcase 2 over the entire circumference with the same Surface pressure is pressed against the flange 4 to guarantee oil tightness.

Da der äußere Rand des Flansches der Ölwanne 1 in dem Bereich wo dieser dem Torsionsschwingungsdämpfer 5 gegenüberliegt aus Platzgründen nicht umgebördelt werden kann, ist in diesem Bereich eine Profilbrücke 6 vorgesehen, welche durch die Schrauben 3 (Figur 7) die Dichtung gegen den Flansch 4 pressen.Since the outer edge of the flange of the oil pan 1 cannot be flanged in the area where it lies opposite the torsional vibration damper 5 for reasons of space, a profile bridge 6 is provided in this area, which press the seal against the flange 4 by means of the screws 3 (FIG. 7) .

Die Ölwanne 1 ist annähernd äquidistant von einer Überwanne 7 umgeben, welche entweder in Kunststoff oder in Stahlblech in Tiefziehqualität ausgeführt sein kann. Dag Stahlblech kann je nach den Ansprüchen an die Schalldämmung ein, bzw., zwei- oder mehrlagig ausgelegt werden. Die Überwanne 7 ist an allen Be­rührungsstellen mit der Ölwanne 1 oder dem Kurbelgehäuse 2 durch elastomere Elemente körperschallentkoppelt verbunden.The oil pan 1 is approximately equidistantly surrounded by an overpan 7, which can be made either in plastic or in sheet steel in deep-drawing quality. Dag sheet steel can be designed in one or two or more layers depending on the requirements for sound insulation. The overpan 7 is connected at all points of contact with the oil pan 1 or the crankcase 2 by structure-borne noise decoupled by elastomeric elements.

Zur Verbindung der Ölwanne 1 mit der Überwanne 7 ist am oberen Rand der Überwanne 7 ein l-förmiges Profil 8 vorgesehen, in das ein nach oben offenes erstes elastomeres Element 9 eingelegt ist. Die Überwanne 7 ist gegenüber einem Schwungradgehäuse 10 als einem Teil des Kurbelgehäuses 2 über ein zweites elastomeres Element 11 gegen Schallaustritt abgedichtet. Das zweite elastomere Element 11 ist dabei einseitig offen und wird über den Rand der Überwanne 7 geschoben und gegen das Schwungradgehäuse 10 angepreßt.To connect the oil pan 1 to the overpan 7, an L-shaped profile 8 is provided on the upper edge of the overpan 7, in which an upwardly open first elastomeric element 9 is inserted. The overpan 7 is compared to a flywheel housing 10 as one Part of the crankcase 2 sealed against sound leakage via a second elastomeric element 11. The second elastomeric element 11 is open on one side and is pushed over the edge of the overpan 7 and pressed against the flywheel housing 10.

Die Ölwanne 1 weist an ihrer tiefsten Stelle eine Ablaßschraube 12 auf. Die Ablaßschraube 12 bzw. deren Gewindeteil 13 wird gegen die Überwanne 7 mittels einem dritten elastomeren Element 14 gegen Schallaustritt abgedichtet.The oil pan 1 has a drain plug 12 at its lowest point. The drain plug 12 or its threaded part 13 is sealed against the over-tub 7 by means of a third elastomeric element 14 against sound leakage.

Einen Querschnitt II-II durch die Ölwanne 1 stellt Figur 2 dar. Die Ölwanne 1 wird unter Zwischenlage einer Dichtung 1a mittels der Schrauben 3 gegen den Flansch 4 des Kurbelgehäuses 2 ange­preßt. Die Ölwanne 1 wird äquidistant von der Überwanne 7 um­geben. Der Flansch der Ölwanne 1 ist außen umgebördelt. Ein Schenkel 1b greift von oben her in das oben offene erste elastomere Element 9 ein. Weitere Elemente der Ölwanne 1, wie die Ablaßschraube 12, ein Stutzen 15 für die Öleinfüllung und Blechkalotten 16, die dem Motor als Standauflage dienen, werden an den Berührungsstellen durch weitere elastomere Elemente zur Oberwanne 7 gegen Schallaustritt abgedichtet. Details über die Ausbildung dieser elastomeren Verbindungsele­mente werden in den nachfolgenden Figuren gezeigt.FIG. 2 shows a cross section II-II through the oil pan 1. The oil pan 1 is pressed against the flange 4 of the crankcase 2 by means of the screws 3 with the interposition of a seal 1a. The oil pan 1 is surrounded equidistantly by the overpan 7. The flange of the oil pan 1 is flanged on the outside. A leg 1b engages from above into the first elastomeric element 9, which is open at the top. Other elements of the oil pan 1, such as the drain plug 12, a nozzle 15 for the oil filler and sheet metal caps 16, which serve as a support for the engine, are sealed at the points of contact by further elastomeric elements to the upper pan 7 against sound leakage. Details of the design of these elastomeric connecting elements are shown in the following figures.

Eine Verbindung von Ölwanne 1 und der Überwanne 7 in Kunst­stoffausführung ist in Figur 3 dargestellt. Die Überwanne 7 weist Haltenasen 17 auf, die Ölwanne 1 besitzt unter den zur Befestigung der Überwanne 7 mitverwendeten Schrauben 3 be­sonders geformte Unterlagen 18 und beide Teile werden durch Federdrahtbügel 19 kraftschlüssig verbunden. Durch das erste elastomere Element 9 wird eine Abdichtung gegen Luftschall und eine Entkoppelung vom Körperschall erzielt.A connection of the oil pan 1 and the overpan 7 made of plastic is shown in FIG. 3. The overpan 7 has retaining lugs 17, the oil pan 1 has, under the screws 3 used for fastening the overpan 7, specially shaped underlays 18, and both parts are non-positively connected by spring wire clips 19. A seal against airborne noise and a decoupling from structure-borne noise is achieved by the first elastomeric element 9.

In Figur 4 ist im Detail die Schall-Abdichtung des Durch­bruches für die Ablaßschraube 12 gezeigt. Die Ablaßschraube 12 ist in ein gewindeteil 13 eingeschraubt, welches öldicht in die Ölwanne 1 eingesetzt ist. Die Verbindung des Gewindeteils 13 mit der Überwanne 7 erfolgt durch das dritte elastomere Element 14, welches gegenüber dem Gewindeteil 13 durch eine kreisringförmige Dichtlippe 20 gegen Austritt von Luftschall abgedichtet ist. Die Abdichtung gegen die Überwanne 7 erfolgt mittels einer kreisringförmigen Nut 21, welche eine Bohrung in der Überwanne 7 dichtend umgreift.In Figure 4, the sound seal of the opening for the drain plug 12 is shown in detail. The drain plug 12 is screwed into a threaded part 13, which is oil-tight in the Oil pan 1 is inserted. The threaded part 13 is connected to the overpan 7 by the third elastomeric element 14, which is sealed against the threaded part 13 by an annular sealing lip 20 to prevent airborne noise from escaping. The sealing against the overpan 7 takes place by means of an annular groove 21, which sealingly encompasses a bore in the overpan 7.

Figur 5 zeigt im Detail die Schall-Abdichtung der Blech­kalotte 16, welche durch Punktschweißung oder dergleichen mit der Ölwanne 1 verbunden ist. Zur Abdichtung wird ein viertes elastomeres Element 22 vorgesehen, welches nahezu baugleich mit dem dritten elastomeren Element 14 ist, weshalb es nicht näher erläutert werden soll.Figure 5 shows in detail the sound seal of the sheet metal cap 16, which is connected to the oil pan 1 by spot welding or the like. A fourth elastomeric element 22 is provided for sealing, which is almost identical in construction to the third elastomeric element 14, which is why it will not be explained in more detail.

In Figur 6 ist die Schall-Abdichtung des Stutzens 15 darge­stellt, welcher der Öleinfüllung dient. Der Stutzen 15 ist an seinem oberen Ende mit einem fünften elastomeren Element 23 gegen die Überwanne 7 abgedichtet. Dieses elasto­mere Element 23 ist ähnlich mit den elastomeren Elementen 14 und 22. An seinem unteren Ende wird der Stutzen 15 in die Ölwanne 1 in den eingelöteten Gewindeeinsatz 24 öldicht ein­geschraubt. Analog erfolgen auch Befestigung des Anschluß­stutzens für das Ölmeßrohr in der Ölwanne und dessen Schall­abdichtung gegenüber der Überwanne 7.In Figure 6, the sound seal of the nozzle 15 is shown, which is used for oil filling. The nozzle 15 is sealed at its upper end with a fifth elastomeric element 23 against the overpan 7. This elastomeric element 23 is similar to the elastomeric elements 14 and 22. At its lower end, the connector 15 is screwed into the oil pan 1 in the soldered-in threaded insert 24 in an oil-tight manner. The connection piece for the oil measuring tube in the oil pan and its soundproofing are also fixed analogously to the overpan 7.

Ein Detail der Profilbrücke 6 gemäß einem Schnitt VII-VII aus Figur 8 ist in Figur 7 dargestellt. Da im Bereich des Schwin­gungsdämpfers 5 der obere Rand der Ölwanne 1 nicht u-förmig umgebördelt werden kann, so daß hier der Schenkel 1b entfällt, wird zum gleichmäßigen Anpressen der Dichtung 1a (Figur 2) die Profilbrücke 6 vorgesehen, welche über die nötige Biegestei­figkeit verfügt, um die Anpreßkraft der Schrauben 3 gleich­mäßig als Streckenlast über die Stirnseite der Ölwannendich­tung zu verteilen.A detail of the profile bridge 6 according to a section VII-VII from FIG. 8 is shown in FIG. Since the upper edge of the oil pan 1 cannot be flanged in a U-shape in the area of the vibration damper 5, so that the leg 1b is omitted here, the profile bridge 6 is provided for evenly pressing the seal 1a (FIG. 2), which has the necessary bending rigidity to evenly distribute the contact pressure of the screws 3 as a line load over the face of the oil pan gasket.

Bei der in Figur 7 im Schnitt VII-VII dargestellten Ausführung der Überwanne 7 in Kunststoff ist auf der Oberseite derselben ein u-förmiges Profil 25 vorgesehen, um das erste elastomere Element 9 aufzunehmen. Die Profilbrücke 6 verfügt über eine Nase 26, in die das nach oben offene erste elastomere Element 9 eingeschoben wird. Dadurch wird in diesem Bereich Luft­schalldichtheit zwischen Ölwanne 1 und Überwanne 7 erzielt.In the embodiment of the overpan 7 in plastic shown in section VII-VII in FIG. 7, a U-shaped profile 25 is provided on the top thereof in order to receive the first elastomeric element 9. The profile bridge 6 has a nose 26 into which the first elastomeric element 9, which is open at the top, is inserted. As a result, air-tightness between oil pan 1 and overpan 7 is achieved in this area.

Der in Figur 7 im Schnitt gezeigte Bereich ist in Figur 8 in der Draufsicht wiedergegeben. Die Schrauben 3, welche in gleichen Abständen entlang der Profilbrücke 6 verteilt sind, pressen diese unter Zwischenschaltung der Ölwanne 1 und einer Dichtung 1a (Figur 2) gegen das Kurbelgehäuse 2.The area shown in section in FIG. 7 is shown in plan view in FIG. The screws 3, which are distributed at equal intervals along the profile bridge 6, press them against the crankcase 2 with the interposition of the oil pan 1 and a seal 1a (FIG. 2).

Die Figur 9 zeigt im Detail die Schall-Abdichtung der Über­wanne 7 gegenüber dem Schwungradgehäuse 10. Die Überwanne 7 ist in Richtung des Schwungradgehäuses 10 offen und endet hier in einem Steg 7a. Dieser wird durch das zweite elastomere Element 11 gegen das Schwungradgehäuse 10 abgedichtet. Um einen Festsitz zu gewährleisten und Rutschen zu vermeiden ist dieses zweite elastomere Element 11 im Bereich des Ölwannen­flansches abgewinkelt und endet auf rechter und linker Seite in den spiegelbildlich gestalteten zwei Schenkeln 29, die auf die rechts- und linksseitig dem Ölwannenflansch des Kurbelge­häuses 2 zugewandten Stegabschnitte 30 der Überwanne 7 aufge­steckt sind. Um ein Abrutschen zu vermeiden, besitzen die beiden Schenkel 29 je eine auf einer Auflagefläche 31 (Figur 11) der Überwanne 7 aufliegende Erweiterung, die von einem aus Figur 10 ersichtlichen Versteifungsschenkel 1b, des Öl­wannenflansches in einem Bereich "C" niedergedrückt wird. Das zweite elastomere Element 11, das an das erste elastomere Element 9 (Figur 1) möglichst fugenlos anstößt, ist somit in allen Richtungen befestigt und fixiert.FIG. 9 shows in detail the sound seal of the overpan 7 with respect to the flywheel housing 10. The overpan 7 is open in the direction of the flywheel housing 10 and ends here in a web 7a. This is sealed against the flywheel housing 10 by the second elastomeric element 11. In order to ensure a tight fit and to prevent slipping, this second elastomeric element 11 is angled in the region of the oil pan flange and ends on the right and left side in the mirror-image-shaped two legs 29 which face the web sections 30 facing the oil pan flange of the crankcase 2 on the right and left sides the tub 7 are attached. In order to prevent slipping, the two legs 29 each have an extension resting on a support surface 31 (FIG. 11) of the overpan 7, which is pressed down in an area "C" by a stiffening leg 1b, shown in FIG. 10, of the oil pan flange. The second elastomeric element 11, which abuts the first elastomeric element 9 (FIG. 1) as seamlessly as possible, is thus fastened and fixed in all directions.

In der Figur 11 ist die Verbindung der Überwanne 7 mit der Ölwanne 1 dargestellt. Da im gezeigten Beispiel die Überwanne 7 in Stahlblech ausgeführt ist, ist es unabdingbar, für eine schalltechnische Entkopplung zu sorgen. Die Verbindung erfolgt durch Federdrahtbügel 19. Diese Federdrahtbügel 19 sind an mindestens einer Berührungsstelle (hier mit der Ölwanne 1) unter Zwischenlage eines sechsten elastomeren Elements 32 an­geschlossen. Das andere Ende kann unmittelbar mit einer Nase 33 verbunden werden, die an die Überwanne 7 angeschlossen ist. Alternativ kann das Element 32 auch auf einer Sonder-Schrauben­auflage 18 gemäß Figur 3 aufliegen.FIG. 11 shows the connection between the overpan 7 and the oil pan 1. Since the overpan 7 is made of sheet steel in the example shown, it is essential to provide acoustic decoupling. The connection is made by spring wire clips 19. These spring wire clips 19 are connected to at least one contact point (here with the oil pan 1) with the interposition of a sixth elastomeric element 32. The other end can be connected directly to a nose 33 which is connected to the overpan 7. Alternatively, the element 32 can also rest on a special screw support 18 according to FIG. 3.

Die Figur 12 zeigt das gleiche Detail wie in Figur 10 darge­stellt, allerdings bezogen auf eine Ausführung im Stahlblech.Figure 12 shows the same detail as shown in Figure 10, but related to a version in sheet steel.

Da die Konstruktionselemente bei der Ausführung in Stahlblech im übrigen die gleichen sind wie bei der in den Figuren 3 bis 10 gezeigten Kunststoffausführung wird auf gesonderte Dar­stellung verzichtet.Since the construction elements in the execution in sheet steel are otherwise the same as in the plastic embodiment shown in Figures 3 to 10, a separate illustration is omitted.

Claims (9)

1. Schallgedämmte Blech-Ölwanne für Brennkraftmaschinen, bei der die Ölwanne mittels Schrauben unter Zwischenlage einer Dichtung dmit einem umlaufenden Flansch eines Kurbelgehäuses verbunden ist, wobei die Ölwanne ein- oder mehrlagig ausge­führt sein kann und an ihrer tiefsten Stelle eine Ablaß­schraube, sowie seitlich schräg nach innen verlaufenden Stutzen für Öleinfüllung und Ölmessung aufweist, dadurch gekennzeichnet, daß die Ölwanne (1) in geringer Distanz von einer Überwanne (7) umgeben wird, daß an allen Be­rührungsstellen von Ölwanne (1) und Überwanne (7), bzw. von Schwungradgehäuse (10) und Überwanne (7) diese Teile unter Zwischenschaltung elastomerer Elemente (9, 11, 14, 22, 23, 32) verbunden sind, und daß als kraftschlüssiges Verbin­dungsmittel zwischen Ölwanne (1) und Überwanne (7) Feder­draht- oder Federbandbügel (19) vorgesehen sind.1. Soundproof sheet oil pan for internal combustion engines, in which the oil pan is connected by means of screws with the interposition of a seal d with a circumferential flange of a crankcase, the oil pan can be made in one or more layers and at its deepest point a drain screw and laterally at an angle has internal spigot for oil filling and oil measurement, characterized in that the oil pan (1) is surrounded at a short distance by an overpan (7), that at all points of contact of the oil pan (1) and overpan (7), or flywheel housing ( 10) and overpan (7) these parts are connected with the interposition of elastomeric elements (9, 11, 14, 22, 23, 32), and that as a non-positive connection means between oil pan (1) and overpan (7) spring wire or spring band bracket (19th ) are provided. 2. Schallgedämmte Ölwanne nach Anspruch 1, dadurch gekenn­zeichnet, daß das Element zur Verbindung der Ölwanne (1) mit der Überwanne (7) aus einem nach oben offenen ersten elastomeren Element (9) gebildet wird, welches in ein ebenfalls nach oben geöffnetes u- bzw. l-förmig geformtes umlaufendes Profil (8) auf der Oberseite der Überwanne (7) eingelegt ist, und daß das offene elastomere Element (9) in einen Schenkel (1b) des Ölwannenflansches gesteckt wird.2. Sound-insulated oil pan according to claim 1, characterized in that the element for connecting the oil pan (1) with the overpan (7) from an upwardly open first elastomeric element (9) is formed, which in a likewise open upwards u- or l-shaped peripheral profile (8) is placed on the top of the overpan (7), and that the open elastomeric element (9) is inserted into one leg (1b) of the oil pan flange. 3. Schallgedämmte Ölwanne nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Ölwanne (1) zur Erhöhung der Biege­steifigkeit des Ölwannenflansches, in einem Bereich gegen­über einem Torsionsschwingungsdämpfer (5) gelegen, unter Zwischenschaltung einer Profilbrücke (6) mittels der Schrauben (3) an einen Flansch (4) des Kurbelgehäuses (2) anpreßbar ist, daß die Abdichtung zwischen der Überwanne (7) und der Profilbrücke (6) durch eine Nase (26) bewerkstelligt wird, welche in das nach oben offene erste elastomere Element (9) gesteckt wird.3. Sound-insulated oil pan according to claims 1 and 2, characterized in that the oil pan (1) to increase the bending stiffness of the oil pan flange, located in an area opposite a torsional vibration damper (5), with the interposition of a profile bridge (6) by means of the screws (3 ) can be pressed onto a flange (4) of the crankcase (2) in such a way that the seal between the overpan (7) and the profile bridge (6) is brought about by a nose (26) which fits into the first elastomeric element (9 ) is inserted. 4. Schallgedämmte Ölwanne nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Ölwanne (7) in Richtung eines Schwungradgehäuses (10), welches ein Teil des Kurbelgehäuses (2) ist, offen ist, und daß die Abdichtung zwischen der Überwanne (7) und dem Schwungradgehäuse (10) durch ein zweites elastomeres Element (11) erfolgt, wobei dieses über den Rand der Überwanne gesteckt und gegen das Schwungrad­gehäuse (10) gepreßt wird.4. Sound-insulated oil pan according to claims 1 and 2, characterized in that the oil pan (7) in the direction of a flywheel housing (10), which is part of the crankcase (2), is open, and that the seal between the overpan (7th ) and the flywheel housing (10) by a second elastomeric element (11), which is placed over the edge of the overpan and pressed against the flywheel housing (10). 5. Schallgedämmte Ölwanne nach Anspruch 1, dadurch gekenn­zeichnet, daß der Stutzen (15) für die Öleinfüllung, bzw. für die Messung des Ölstandes an seinem äußeren Ende über ein fünftes elastomeres Element (23) an die Überwanne (7) angeschlossen ist, und daß der Stutzen (15) an seinem inneren Ende über einen eingelöteten Gewindering (24) mit der Ölwanne (1) öldicht verschraubt ist.5. Sound-insulated oil pan according to claim 1, characterized in that the nozzle (15) for the oil filling, or for measuring the oil level at its outer end via a fifth elastomeric element (23) is connected to the overpan (7), and that the socket (15) is screwed to the oil pan (1) in an oil-tight manner at its inner end via a soldered-in threaded ring (24). 6. Schallgedämmte Ölwanne nach Anspruch 1, dadurch gekenn­zeichnet, daß die Ablaßschraube (12) in ein mit der Öl­wanne (1) verbundenes Gewindeteil (13) eingeschraubt ist, und daß das Gewindeteil (13) zur Schallabdichtung über ein drittes Elastomeres Element (14) mit der Überwanne (7) in Verbindung steht, wobei das dritte elastomere Element (14) kreisringförmig ausgebildet ist und an einem äußeren Rand mittels einer kreisförmigen Nut (21) eine Öffnung der Über­wanne (7) luftschalldichtend umgreift und an einem inneren Rand eine elastische Dichtlippe (20) aufweist, welche gegen das Gewindeteil (13) angepreßt wird.6. Sound-insulated oil pan according to claim 1, characterized in that the drain plug (12) is screwed into a threaded part (13) connected to the oil pan (1), and that the threaded part (13) for soundproofing via a third elastomer element (14) with the over-tub (7) is connected, the third elastomeric element (14) being annular and encompassing an opening of the overpan (7) in an air-sound-sealing manner on an outer edge by means of a circular groove (21) and having an elastic sealing lip (20) on an inner edge, which is pressed against the threaded part (13). 7. Schallgedämmte Ölwanne nach Anspruch 1, dadurch gekenn­zeichnet, daß die Ölwanne (1) an ihrem Boden erhabene Blechkalotten (16) aufweist, wobei die Kalotten (16) durch die Überwanne (7) geführt sind, daß zur luftschalldämmenden Abdichtung ein viertes elastomeres Element (22) vorgesehen ist, welches zwischen Überwanne (7) und der Blechkalotte (16) angeordnet ist, und daß das vierte elastomere Element (22) ähnlich dem dritten elastomeren Element (14) ist.7. Sound-insulated oil pan according to claim 1, characterized in that the oil pan (1) has raised sheet metal domes (16) on its bottom, the domes (16) being guided through the overpan (7) in that a fourth elastomeric element for airborne sound-proofing (22) is provided, which is arranged between the overpan (7) and the sheet metal cap (16), and that the fourth elastomeric element (22) is similar to the third elastomeric element (14). 8. Schallgedämmte Ölwanne nach Anspruch 1, dadurch gekenn­zeichnet, daß die Überwanne (7) in Kunststoff ausgeführt ist, daß die Verbindung dieser Überwanne (7) mit der Ölwanne (1) durch Federdraht- oder Federbandbügel (19) er­folgt, wobei diese Federbügel (19) an einem Ende in eine Haltenase (17) der Überwanne (7) und an einem anderen Ende unmittelbar in den gemäß Figur 11 örtlich geformten Öl­wannenflansch, oder eine Spezialunterlage (18) unter den gleichzeitig zur Befestigung der Überwanne (7) dienenden Schrauben (3) einrasten.8. Sound-insulated oil pan according to claim 1, characterized in that the overpan (7) is made of plastic, that the connection of this overpan (7) with the oil pan (1) by spring wire or spring band bracket (19), said spring bracket ( 19) at one end into a retaining lug (17) of the overpan (7) and at another end directly into the oil pan flange which is locally shaped according to FIG. 11, or a special base (18) under the screws (7) used at the same time to fasten the overpan (7) 3) click into place. 9. Schallgedämmte Ölwanne nach Anspruch 1, dadurch gekenn­zeichnet, daß die Überwanne (7) in Stahlblech ausgeführt ist, wobei das Stahlblech ein- oder mehrlagig sein kann und Stahlblech in tiefziehfähiger Qualität verwendet wird, daß die Verbindung von Überwanne (7) und Ölwanne (1) durch Federdrahtbügel (19) erfolgt, und daß die Feder­drahtbügel (19) an mindestens einem Ende unter Zwischen­schaltung eines sechsten elastomeren Elementes (32) in den gemäß Figur 11 örtlich geformten Ölwannenflansch oder Spezialunterlagen (18) unter den gleichzeitig zur Befestigung der Überwanne (7) dienenden Schrauben (3) und an dem anderen Ende unmittelbar in eine Nase (33) der Überwanne (7) einrasten.9. Sound-insulated oil pan according to claim 1, characterized in that the overpan (7) is made of sheet steel, the steel sheet can be one or more layers and sheet steel is used in deep-drawing quality that the connection of overpan (7) and oil pan ( 1) by spring wire bracket (19), and that the spring wire bracket (19) at at least one end with the interposition of a sixth elastomeric element (32) in the locally shaped oil pan flange according to FIG. 11 or special underlays (18) under which at the same time for fastening the overpan (7) serving screws (3) and at the other end snap directly into a nose (33) of the overpan (7).
EP90115073A 1989-09-06 1990-08-06 Noise damped sheet oil sump for an internal combustion engine Expired - Lifetime EP0416297B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90115073T ATE81187T1 (en) 1989-09-06 1990-08-06 SOUND-INSULATED SHEET METAL OIL PAN FOR COMBUSTION ENGINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3929592 1989-09-06
DE3929592A DE3929592A1 (en) 1989-09-06 1989-09-06 SOUND-INSULATED SHEET OIL PAN FOR INTERNAL COMBUSTION ENGINES

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EP0416297A1 true EP0416297A1 (en) 1991-03-13
EP0416297B1 EP0416297B1 (en) 1992-09-30

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EP90115073A Expired - Lifetime EP0416297B1 (en) 1989-09-06 1990-08-06 Noise damped sheet oil sump for an internal combustion engine

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EP (1) EP0416297B1 (en)
JP (1) JPH03100358A (en)
AT (1) ATE81187T1 (en)
DD (1) DD297683A5 (en)
DE (2) DE3929592A1 (en)

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EP0691462A1 (en) * 1994-07-07 1996-01-10 Steyr Nutzfahrzeuge Ag Partially encapsulated internal combustion engine
EP0872632A1 (en) * 1997-04-16 1998-10-21 Kunststofftechnik F.u.H. Riesselmann GmbH Oil pan for internal combustion engine
CN115341995A (en) * 2022-08-31 2022-11-15 东风商用车有限公司 Engine flywheel housing sound-proof shield and preparation method thereof

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DE19937598A1 (en) * 1999-08-09 2001-02-15 Himmermann Fritz Gmbh Co Kg Adapter for oil filler neck
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US7387190B2 (en) 2003-12-17 2008-06-17 General Motors Corporation Oil pan assembly and method of selecting an oil pan
DE102007032649A1 (en) 2007-07-13 2009-01-15 Man Nutzfahrzeuge Ag Tub and method for its manufacture
DE102007044494B4 (en) * 2007-09-18 2012-10-25 Ab Skf Device comprising a functional element of an internal combustion engine and a carrier
US7631630B2 (en) * 2008-01-07 2009-12-15 Federal-Mogul World Wide, Inc. Vehicle engine and snap-on engine cover assembly therefor and method of assembly of the cover assembly to the engine
JP4938807B2 (en) * 2009-01-23 2012-05-23 株式会社クボタ Engine manufacturing method
DE102009006635A1 (en) 2009-01-29 2010-08-05 Daimler Ag Container wall i.e. oil sump, for motor vehicle, has decoupling element physically separating inner and outer walls from one another, where element is flat in shape and covers inner wall and/or outer wall in tight-fitting manner
JP2020101101A (en) * 2018-12-20 2020-07-02 マツダ株式会社 Cover structure of engine
KR102712019B1 (en) 2022-11-21 2024-09-27 현대트랜시스 주식회사 Noise reduction apparatus of oil pan

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CN115341995A (en) * 2022-08-31 2022-11-15 东风商用车有限公司 Engine flywheel housing sound-proof shield and preparation method thereof

Also Published As

Publication number Publication date
DD297683A5 (en) 1992-01-16
DE3929592C2 (en) 1992-05-27
EP0416297B1 (en) 1992-09-30
DE3929592A1 (en) 1991-03-28
JPH03100358A (en) 1991-04-25
ATE81187T1 (en) 1992-10-15
DE59000332D1 (en) 1992-11-05

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