EP1674703B1 - Crankshaft bearing beam for an internal combustion engine - Google Patents

Crankshaft bearing beam for an internal combustion engine Download PDF

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Publication number
EP1674703B1
EP1674703B1 EP05022960A EP05022960A EP1674703B1 EP 1674703 B1 EP1674703 B1 EP 1674703B1 EP 05022960 A EP05022960 A EP 05022960A EP 05022960 A EP05022960 A EP 05022960A EP 1674703 B1 EP1674703 B1 EP 1674703B1
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EP
European Patent Office
Prior art keywords
crankshaft
bearing
crankshaft bearing
bearing bridge
bridge according
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Application number
EP05022960A
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German (de)
French (fr)
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EP1674703A3 (en
EP1674703A2 (en
Inventor
Michael Paul
Joachim Grünberger
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0043—Arrangements of mechanical drive elements
    • F02F7/0053—Crankshaft bearings fitted in the crankcase
    • 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
    • F01M2011/0033—Oilsumps with special means for guiding the return of oil into the sump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0043—Arrangements of mechanical drive elements
    • F02F7/0053—Crankshaft bearings fitted in the crankcase
    • F02F2007/0056—Crankshaft bearings fitted in the crankcase using bearing beams, i.e. bearings interconnected by a beam or multiple beams

Definitions

  • the invention relates to a crankshaft bearing bridge for an internal combustion engine of the reciprocating type according to the preamble of patent claim 1.
  • a known internal combustion engine of the type mentioned, EP 0 038 560 A1 Has a cylinder crankcase, which is connected at a parting plane to a crankshaft bearing bridge.
  • a crankshaft is provided between the cylinder crankcase and the crankshaft bearing bridge, the bearing journals of which are bored by bores in the bearing cheeks of the cylinder crankcase and the crankshaft bearing bridge extending transversely to a longitudinal axis of the crankshaft.
  • the bearing jaws in the crankshaft bearing bridge are designed as bearing caps, are incorporated in the bore halves of the bearing bores.
  • the bearing caps are limited by longitudinal members, wherein the longitudinal members represent the only support for the bearing caps.
  • an internal combustion engine in which a plurality of storage chairs are provided for the storage of the crankshaft, between each of which a reinforcing wall is provided.
  • the reinforcing wall has two pieces of ribs which are intended to prevent a sloshing of lubricating oil within the oil sump chamber.
  • the reinforcing wall is formed in the form of a projection and is located only on one side, so that a high sloshing of the oil from the oil pan in the direction of the crankshaft is prevented.
  • crankshaft bearing for an internal combustion engine, in which a crankcase and attached bearing caps, which form part of a crankshaft bearing bridge made of a light metal alloy.
  • the bearing caps are designed as an encapsulation for iron-metal cores, which contribute cores to increase the rigidity of the bearing cap and the crankshaft bearing bridge and In addition, reduce the noise causing bearing clearance between the bearing bore and journal of a crankshaft.
  • crankshaft bearing which is provided in a housing made of a light metal alloy of an internal combustion engine and comprises a bearing bore for a crank pin.
  • a device for reducing the bearing clearance increase between bearing bore crankpin is effective.
  • This device is as a ring-like between bearing bore and crank pin working Kompensatorglied executed, which consists of a material having a relatively large coefficient of thermal expansion.
  • crankshaft bearing bridge made of a light metal alloy
  • the rigid frame assembly with the connecting elements between the bearing blocks of the crankshaft bearing bridge can be realized with little effort without additional bimetallic effects causing devices - iron-metal cast-in inserts.
  • the connecting elements or the forming relatively thin-walled parts not only act as oil planer, but these connecting elements are formed and arranged in such a way that partially relatively large oil passage channels result whereby even pumping losses are reduced.
  • this framework-like composite frame in conjunction with the temperature-treated bearing seats made of the light metal alloy contributes to the fact that over the operating temperature of the internal combustion engine, a uniformly controlled enlargement of the bearing bore takes place, i. an otherwise common ovalization of said bearing bore is at least reduced.
  • An internal combustion engine 1 of the reciprocating type with a plurality of cylinders is designed for installation in a non-illustrated motor vehicle and comprises two arranged in a V-shape cylinder banks 2 and 3, in which pistons 4 and 5 work.
  • the pistons 4 and 5 are connected with the interposition of connecting rods 6 and 7 with a crankshaft 8, which is rotated in the direction of arrow A and received by crankshaft bearings 9.
  • the crankshaft bearings 9 are formed by a cylinder crankcase 10 and a crankshaft bearing bridge 11, both made of a light metal alloy and are assembled in a parting plane BB, and they take with bearing bores 12 bearing journals, not shown, of a longitudinal axis CC.
  • Fig. 2 comprehensive crankshaft 8 on.
  • the crankshaft bearing bridge 11 is provided with transverse to the longitudinal axis CC bearing caps 13,14,15,16 and 17, each having bore halves 18.
  • the bearing caps 13,14,15,16 and 17 are limited to outer longitudinal sides LI and LII of longitudinal members 19 and 20 and said bearing cap open at least in the region of the parting plane BB mediation of thickening extensions 21 in the side members 19 and 20 a.
  • the extensions 21 have - seen from above on the crankshaft bearing bridge - Y-shape, and they taper to a parting plane DD of the crankshaft bearing bridge 11 out - Fig. 5 - to which an oil sump ⁇ w is connected.
  • the bearing caps with connecting elements 22, 23, 24 and 25 are supported, extending between Longitudinal members 19 and 20 extend and are made in one piece with the bearing caps 13,14, 15,16 and 17.
  • each connecting element for example 24, has a first element section 26 and a second element section 27 defining a first oil passageway.
  • a second oil passageway 29 and a third oil passageway 30 are provided between the element sections 26 and 27 and the longitudinal beams.
  • the element sections 26 and 27 are provided relatively thin-walled and in cross-section with the strength-increasing profiles 31 and 32.
  • the first element section 26 in cross-section T-shaped - lying T -aushow, in such a way that a leg 33 approximately parallel to the separation plane BB and a web 34 extends approximately at right angles to the leg 33.
  • the second element portion 27, however, is designed almost C-shaped.
  • free ends 35 and 36 of the element sections 26 and 27 are formed as oil planer, which are brought to Abstreifkonturen Ak of the connecting rods 6 and 7.
  • Fig. 6 shows how by targeted temperature treatment of the bearing cap 13 to 17, the strength properties of the latter can be optimized.
  • the first and second cooling elements 37 and 38 are made of iron-metallic material, wherein the first cooling elements 37 are plates which are attached to both sides of the bearing cap 16, for example, 16 to the side walls 39 and 40.
  • the second cooling elements 38 are formed as cylinders with a circular cross section and provided with the shape of the bore halves 18 of the bearing cap 13 to 17.
  • relief recesses 41 are integrated - Fig. 4 and 5 - Provided below the bore halves 18 in said bearing caps and introduced from the parting plane DD from.
  • the relief means 41 whose size can be determined empirically or mathematically, are designed in a U-shaped cross-section, and they extend between through holes 42 and 43, which serve to receive fastening screws. With the fastening screws, the crankshaft bearing bridge 11 is held in position on the cylinder crankcase 10 of the internal combustion engine 1.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

Die Erfindung bezieht sich auf eine Kurbelwellenlagerbrücke für eine Brennkraftmaschine der Hubkolbenbauart nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a crankshaft bearing bridge for an internal combustion engine of the reciprocating type according to the preamble of patent claim 1.

Eine bekannte Brennkraftmaschine der eingangs genannten Gattung, EP 0 038 560 A1 , weist ein Zylinderkurbelgehäuse auf, das an einer Trennebene an eine Kurbelwellenlagerbrücke angeschlossen ist. Zwischen Zylinderkurbelgehäuse und Kurbelwellenlagerbrücke ist eine Kurbelwelle vorgesehen, deren Lagerzapfen von Bohrungen in quer zu einer Längsachse der Kurbelwelle verlaufenden Lagerwangen des Zylinderkurbelgehäuses und der Kurbelwellenlagerbrücke aufgenommen werden. Die Lagerwangen in der Kurbelwellenlagerbrücke sind als Lagerdeckel ausgeführt, in die Bohrungshälften der Lagerbohrungen eingearbeitet sind. An den äußeren Längsseiten der Kurbelwellenlagerbrücke werden die Lagerdeckel von Längsträgern begrenzt, wobei die Längsträger die einzige Abstützung für die Lagerdeckel darstellen.A known internal combustion engine of the type mentioned, EP 0 038 560 A1 , Has a cylinder crankcase, which is connected at a parting plane to a crankshaft bearing bridge. A crankshaft is provided between the cylinder crankcase and the crankshaft bearing bridge, the bearing journals of which are bored by bores in the bearing cheeks of the cylinder crankcase and the crankshaft bearing bridge extending transversely to a longitudinal axis of the crankshaft. The bearing jaws in the crankshaft bearing bridge are designed as bearing caps, are incorporated in the bore halves of the bearing bores. On the outer longitudinal sides of the crankshaft bearing bridge, the bearing caps are limited by longitudinal members, wherein the longitudinal members represent the only support for the bearing caps.

Aus der EP 0 837 236 A1 ist eine Brennkraftmaschine bekannt, bei der für die Lagerung der Kurbelwelle mehrere Lagerstühle vorgesehen sind, zwischen denen jeweils eine Verstärkungswand vorgesehen ist. Die Verstärkungswand weist zwei Rippenstücke auf, die ein Hochschwappen von Schmieröl innerhalb der Ölwannenkammer verhindern sollen. Hier ist die Verstärkungswand in Form eines Vorsprungs ausgebildet und befindet sich nur auf einer Seite, so dass ein Hochschwappen des Öls aus der Ölwanne in Richtung der Kurbelwelle verhindert wird.From the EP 0 837 236 A1 an internal combustion engine is known in which a plurality of storage chairs are provided for the storage of the crankshaft, between each of which a reinforcing wall is provided. The reinforcing wall has two pieces of ribs which are intended to prevent a sloshing of lubricating oil within the oil sump chamber. Here, the reinforcing wall is formed in the form of a projection and is located only on one side, so that a high sloshing of the oil from the oil pan in the direction of the crankshaft is prevented.

Aus der DE 34 26 208 C1 geht ein Kurbelwellenlager für eine Brennkraftmaschine hervor, bei der ein Kurbelgehäuse und daran befestigte Lagerdeckel, die Teil einer Kurbelwellenlagerbrücke bilden aus einer Leichtmetall-Legierung bestehen. Die Lagerdeckel sind als Umguß für eisenmetallische Kerne ausgeführt, welche Kerne zur Steifigkeitserhöhung der Lagerdeckel bzw. der Kurbelwellenlagerbrücke beitragen und darüber hinaus das Geräusche verursachende Lagerspiel zwischen Lagerbohrung und Lagerzapfen einer Kurbelwelle reduzieren.From the DE 34 26 208 C1 is a crankshaft bearing for an internal combustion engine, in which a crankcase and attached bearing caps, which form part of a crankshaft bearing bridge made of a light metal alloy. The bearing caps are designed as an encapsulation for iron-metal cores, which contribute cores to increase the rigidity of the bearing cap and the crankshaft bearing bridge and In addition, reduce the noise causing bearing clearance between the bearing bore and journal of a crankshaft.

In der DE 43 30 565 C1 wird ein Kurbelwellenlager beschrieben, das in einem aus einer Leichtmetall-Legierung hergestellten Gehäuse einer Brennkraftmaschine vorgesehen ist und eine Lagerbohrung für einen Kurbelzapfen umfasst. Bei diesem Kurbelwellenlager ist eine Vorrichtung zur Verringerung der Lagerspielvergrößerung zwischen Lagerbohrung Kurbelzapfen wirksam. Diese Vorrichtung ist als ein ringartiges zwischen Lagerbohrung und Kurbelzapfen arbeitendes Kompensatorglied ausgeführt, das aus einem Werkstoff mit einem relativ großen thermischen Ausdehnungskoeffizienten besteht.In the DE 43 30 565 C1 a crankshaft bearing is described, which is provided in a housing made of a light metal alloy of an internal combustion engine and comprises a bearing bore for a crank pin. In this crankshaft bearing, a device for reducing the bearing clearance increase between bearing bore crankpin is effective. This device is as a ring-like between bearing bore and crank pin working Kompensatorglied executed, which consists of a material having a relatively large coefficient of thermal expansion.

Es ist Aufgabe der Erfindung eine mit einem Zylinderkurbelgehäuse verbindbare Kurbelwellenlagerbrücke durch gezielte konstruktive Maßnahmen hinsichtlich Festigkeit und unerwünschter Vergrößerung der Bohrungshälfte der Lagerbohrung zu entwickeln.It is an object of the invention to develop a connectable with a cylinder crankcase crankshaft bearing bridge by targeted constructive measures in terms of strength and unwanted enlargement of the bore half of the bearing bore.

Nach der Erfindung wird diese Aufgabe durch die Merkmale des Patentanspruchs 1 gelöst. Weitere, die Erfindung ausgestaltende Merkmale sind in den Unteransprüche enthalten.According to the invention, this object is solved by the features of patent claim 1. Further, the invention ausgestaltende features are included in the subclaims.

Die mit der Erfindung hauptsächlich erzielten Vorteile sind darin zu sehen, dass aufgrund der besonderen konstruktiven Auslegung der aus einer Leichtmetall-Legierung hergestellten Kurbelwellelagerbrücke letztere besonders steif und fest ist sowie ein vorteilhaft niederes Gewicht aufweist. Der steife Rahmenverbund mit den Verbindungselementen zwischen den Lagerstühlen der Kurbelwellenlagerbrücke lässt sich aufwandsarm ohne zusätzliche Bimetalleffekte verursachende Einrichtungen - eisenmetallische umgossene Einlegeteile - realisieren. Die Verbindungselemente bzw. die sie bildenden relativ dünnwandigen Teile wirken nicht nur als Ölhobel, sondern diese Verbindungselemente sind in der Weise ausgebildet und angeordnet, dass sich teils verhältnismäßig große Öldurchtrittskanäle ergeben wodurch auch noch Pumpverluste reduziert werden. Darüber hinaus trägt dieser tragwerkartige Rahmenverbund in Verbindung mit den Temperatur behandelten Lagerstühlen aus der Leichtmetall-Legierung dazu bei, dass über die Betriebstemperatur der Brennkraftmaschine eine gleichmäßig kontrollierte Vergrößerung der Lagerbohrung erfolgt d.h. eine sonst übliche Ovalisierung der besagten Lagerbohrung wird zumindest reduziert ist.The advantages achieved by the invention are to be seen in the fact that due to the special structural design of the crankshaft bearing bridge made of a light metal alloy latter is particularly stiff and firm and has an advantageous low weight. The rigid frame assembly with the connecting elements between the bearing blocks of the crankshaft bearing bridge can be realized with little effort without additional bimetallic effects causing devices - iron-metal cast-in inserts. The connecting elements or the forming relatively thin-walled parts not only act as oil planer, but these connecting elements are formed and arranged in such a way that partially relatively large oil passage channels result whereby even pumping losses are reduced. In addition, this framework-like composite frame in conjunction with the temperature-treated bearing seats made of the light metal alloy contributes to the fact that over the operating temperature of the internal combustion engine, a uniformly controlled enlargement of the bearing bore takes place, i. an otherwise common ovalization of said bearing bore is at least reduced.

In der Zeichnung wird ein Ausführungsbeispiel der Erfindung gezeigt, das nachstehend erläutert wird.In the drawing, an embodiment of the invention is shown, which will be explained below.

Es zeigen:

Fig. 1
einen schematischen Schnitt durch eine Brennkraftmaschine mit der Kurbelwellenlagerbrücke nach der Erfindung,
Fig. 2
einen Schnitt nach der Linie II-II der Fig. 1 in größerem Maßstab,
Fig. 3
einen Schnitt nach der III-III der Fig. 2,
Fig. 4
einen Schnitt nach der Linie IV-IV der Fig. 2,
Fig. 5
einen Schnitt nach der Linie V-V der Fig. 2,
Fig. 6
eine schematische Ansicht von oben auf die Kurbelwellenlagerbrücke der Fig. 1.
Show it:
Fig. 1
a schematic section through an internal combustion engine with the crankshaft bearing bridge according to the invention,
Fig. 2
a section along the line II-II of Fig. 1 on a larger scale,
Fig. 3
a section after the III-III of Fig. 2 .
Fig. 4
a section along the line IV-IV of Fig. 2 .
Fig. 5
a section along the line VV the Fig. 2 .
Fig. 6
a schematic view from above of the crankshaft bearing bridge of Fig. 1 ,

Eine Brennkraftmaschine 1 der Hubkolbenbauart mit mehreren Zylindern ist zum Einbau in ein nicht dargestelltes Kraftfahrzeug ausgebildet und umfasst zwei in V-Form angeordnete Zylinderreihen 2 und 3, in denen Kolben 4 und 5 arbeiten. Die Kolben 4 und 5 sind unter Zwischenschaltung von Pleuelstangen 6 und 7 mit einer Kurbelwelle 8 verbunden, die in Pfeilrichtung A rotiert und von Kurbelwellenlagern 9 aufgenommen ist. Die Kurbelwellenlager 9 werden durch ein Zylinderkurbelgehäuse 10 und eine Kurbelwellenlagerbrücke 11, beide bestehen aus einer Leichtmetall-Legierung und sind in einer Trennebene B-B zusammengesetzt, gebildet, und sie nehmen mit Lagerbohrungen 12 nicht gezeigte Lagerzapfen der eine Längsachse C-C - Fig. 2 - umfassenden Kurbelwelle 8 auf. Hierzu ist die Kurbelwellenlagerbrücke 11 mit quer zur Längsachse C-C verlaufenden Lagerdeckeln 13,14,15,16 und 17 versehen, die jeweils Bohrungshälften 18 besitzen. Die Lagerdeckel 13,14,15,16 und 17 werden an äußeren Längsseiten LI und LII von Längsträgern 19 und 20 begrenzt und besagte Lagerdeckel münden zumindest im Bereich der Trennebene B-B unter Vermittlung von verdickungsartigen Erweiterungen 21 in die Längsträger 19 und 20 ein. Die Erweiterungen 21 weisen - von oben auf die Kurbelwellelagerbrücke gesehen - Y-Form auf, und sie verjüngen sich zu einer Trennebene D-D der Kurbelwellenlagerbrücke 11 hin - Fig. 5 -, an die eine Ölwanne Öw angeschlossen ist. In Richtung der Längsachse C-C der Kurbelwelle 8 sind die Lagerdeckel mit Verbindungselementen 22, 23, 24 und 25 abgestützt, die sich zwischen Längsträgern 19 und 20 erstrecken und aus einem Stück mit den Lagerdeckel 13,14, 15,16 und 17 hergestellt sind.An internal combustion engine 1 of the reciprocating type with a plurality of cylinders is designed for installation in a non-illustrated motor vehicle and comprises two arranged in a V-shape cylinder banks 2 and 3, in which pistons 4 and 5 work. The pistons 4 and 5 are connected with the interposition of connecting rods 6 and 7 with a crankshaft 8, which is rotated in the direction of arrow A and received by crankshaft bearings 9. The crankshaft bearings 9 are formed by a cylinder crankcase 10 and a crankshaft bearing bridge 11, both made of a light metal alloy and are assembled in a parting plane BB, and they take with bearing bores 12 bearing journals, not shown, of a longitudinal axis CC. Fig. 2 - comprehensive crankshaft 8 on. For this purpose, the crankshaft bearing bridge 11 is provided with transverse to the longitudinal axis CC bearing caps 13,14,15,16 and 17, each having bore halves 18. The bearing caps 13,14,15,16 and 17 are limited to outer longitudinal sides LI and LII of longitudinal members 19 and 20 and said bearing cap open at least in the region of the parting plane BB mediation of thickening extensions 21 in the side members 19 and 20 a. The extensions 21 have - seen from above on the crankshaft bearing bridge - Y-shape, and they taper to a parting plane DD of the crankshaft bearing bridge 11 out - Fig. 5 - to which an oil sump Öw is connected. In the direction of the longitudinal axis CC of the crankshaft 8, the bearing caps with connecting elements 22, 23, 24 and 25 are supported, extending between Longitudinal members 19 and 20 extend and are made in one piece with the bearing caps 13,14, 15,16 and 17.

Die Verbindungselemente 22, 23, 24 und 25 erstrecken sich über eine wesentliche Breite zwischen den Längsträgern 19 und 20, wobei jedes Verbindungselement z.B. 24 einen ersten Elementabschnitt 26 und einen zweiten Elementabschnitt 27 aufweist, die einen ersten Öldurchtrittskanal begrenzen. Darüber hinaus sind zwischen den Elementabschnitte 26 und 27 und den Längsträgern 19 und 20 ein zweiter Öldurchtrittskanal 29 und ein dritter Öldurchtrittskanal 30 vorgesehen. Aus Fig. 3 ist ersichtlich, dass die Elementabschnitte 26 und 27 relativ dünnwandig und im Querschnitt mit die Festigkeit erhöhenden Profilierungen 31 und 32 versehen sind. So ist der erste Elementabschnitt 26 im Querschnitt T-förmig - liegendes T -ausgeführt, und zwar in der Weise, dass ein Schenkel 33 ungefähr parallel zur Trennebene B-B und ein Steg 34 in etwa im rechten Winkel zum Schenkel 33 verläuft. Der zweite Elementabschnitt 27 ist dagegen nahezu C-förmig gestaltet. Außerdem sind freie Enden 35 und 36 der Elementabschnitte 26 und 27 als Ölhobel ausgebildet, die an Abstreifkonturen Ak der Pleuelstangen 6 und 7 herangeführt sind.The connecting elements 22, 23, 24 and 25 extend over a substantial width between the longitudinal beams 19 and 20, wherein each connecting element, for example 24, has a first element section 26 and a second element section 27 defining a first oil passageway. In addition, 19 and 20, a second oil passageway 29 and a third oil passageway 30 are provided between the element sections 26 and 27 and the longitudinal beams. Out Fig. 3 It can be seen that the element sections 26 and 27 are provided relatively thin-walled and in cross-section with the strength-increasing profiles 31 and 32. Thus, the first element section 26 in cross-section T-shaped - lying T -ausgeführt, in such a way that a leg 33 approximately parallel to the separation plane BB and a web 34 extends approximately at right angles to the leg 33. The second element portion 27, however, is designed almost C-shaped. In addition, free ends 35 and 36 of the element sections 26 and 27 are formed as oil planer, which are brought to Abstreifkonturen Ak of the connecting rods 6 and 7.

Aus Fig. 6 geht hervor wie durch gezielte Temperaturbehandlung der Lagerdeckel 13 bis 17 die Festigkeitseigenschaften von letzteren optimiert werden. Dabei werden bei der Herstellung durch kontrollierte Abkühlung - gerichtete Erstarrung der Leichtmetallschmelze - der Kurbelwellenlagerbrücke 11, und zwar durch Anbringung von ersten Kühlelemente 37 und zweiten Kühlelementen 38 bspw. an Seitenwände 39 und 40 bzw. Bohrungshälften 18 der Lagerdeckel 16 bis 20 besagte Festigkeitseigenschaften günstig beeinflusst. Die ersten und zweiten Kühlelemente 37 und 38 bestehen aus eisenmetallischem Werkstoff, wobei die ersten Kühlelemente 37 Platten sind, die beiderseits der Lagerdeckel z.B. 16 an die Seitenwände 39 und 40 angesetzt werden. Dagegen sind die zweiten Kühlelemente 38 als Zylinder mit kreisförmigem Querschnitt ausgebildet und mit der Form der Bohrungshälften 18 der Lagerdeckel 13 bis 17 versehen.Out Fig. 6 shows how by targeted temperature treatment of the bearing cap 13 to 17, the strength properties of the latter can be optimized. In the production by controlled cooling - directional solidification of the light metal melt - the crankshaft bearing bridge 11, namely by attaching first cooling elements 37 and second cooling elements 38, for example, on side walls 39 and 40 or bore halves 18 of the bearing cap 16 to 20 said strength properties favorably influenced , The first and second cooling elements 37 and 38 are made of iron-metallic material, wherein the first cooling elements 37 are plates which are attached to both sides of the bearing cap 16, for example, 16 to the side walls 39 and 40. In contrast, the second cooling elements 38 are formed as cylinders with a circular cross section and provided with the shape of the bore halves 18 of the bearing cap 13 to 17.

In die Lagerdeckel 13 bis 17 der Kurbelwellenlagerbrücke 11 sind Erleichterungsausnehmungen 41 integriert - Fig. 4 und 5 -, die unterhalb der Bohrungshälften 18 in besagten Lagerdeckeln vorgesehen und von der Trennebene D-D aus eingebracht sind. Die Erleichterungseinrichtungen 41, deren Größe empirische oder rechnerisch festlegbar sind, sind im Querschnitt U-förmig ausgeführt, und sie erstrecken sich zwischen Durchgangsbohrungen 42 und 43, die zur Aufnahme von Befestigungsschrauben dienen. Mit den Befestigungsschrauben wird die Kurbelwellenlagerbrücke 11 am Zylinderkurbelgehäuse 10 der Brennkraftmaschine 1 in Lage gehalten.In the bearing cap 13 to 17 of the crankshaft bearing bridge 11 relief recesses 41 are integrated - Fig. 4 and 5 - Provided below the bore halves 18 in said bearing caps and introduced from the parting plane DD from. The relief means 41, whose size can be determined empirically or mathematically, are designed in a U-shaped cross-section, and they extend between through holes 42 and 43, which serve to receive fastening screws. With the fastening screws, the crankshaft bearing bridge 11 is held in position on the cylinder crankcase 10 of the internal combustion engine 1.

Claims (14)

  1. Crankshaft bearing bridge for a reciprocating-piston-type internal combustion engine (1), which crankshaft bearing bridge can be connected at a parting plane (B-B) to a cylinder crankcase (10) and has outer longitudinal beams (19 and 20) which run at a distance from a longitudinal axis (C-C) of a crankshaft, wherein bearing covers (13, 14, 15, 16 and 17), which are aligned perpendicular to the longitudinal axis (C-C), for the crankshaft (8) run between the longitudinal beams (19 and 20), which bearing covers are provided with bore halves of bearing bores for crank pins of the crankshaft (8), wherein the bearing covers (13, 14, 15, 16, and 17) of the crankshaft bearing bridge (11) are supported in the direction of the longitudinal axis (C-C) of the crankshaft (8) by means of connecting elements (22, 23, 24 and 25) which extend between the longitudinal beams (19 and 20), wherein the bearing covers (13 to 17) open into the longitudinal beams (19 and 20) at least in the region of the parting plane (B-B) via widened portions (21), and wherein each connecting element (22, 23, 24 and 25) has a first element section (26) and a second element section (27) between which at least one first oil passage duct is provided, characterized in that a second oil passage duct (29) and a third oil passage duct (30) are provided between the element sections (26 and 27) and the adjacent longitudinal beams (19 and 20).
  2. Crankshaft bearing bridge according to Claim 1, characterized in that the connecting elements (22, 23, 24 and 25) extend over most of the width between the longitudinal beams (19 and 20).
  3. Crankshaft bearing bridge according to Claim 1, characterized in that the element sections (26 and 27) are relatively thin-walled and are provided, in cross section, with strength-increasing profilings (31 and 32).
  4. Crankshaft bearing bridge according to Claim 3, characterized in that the first element section (26) is of T-shaped cross section, with a leg (34) running approximately parallel to the parting plane (B-B) and a web (33) running at right angles to the leg (34).
  5. Crankshaft bearing bridge according to Claim 3, characterized in that the second element section (27) is of approximately C-shaped cross section.
  6. Crankshaft bearing bridge according to Claims 4 and 5, characterized in that free ends (35 and 36) of the element sections (26 and 27) are formed as oil wipers for connecting rods (6 and 7), which move between the bearing covers, of the internal combustion engine (1).
  7. Crankshaft bearing bridge according to Claim 1, characterized in that, by means of targeted temperature treatment of the bearing covers (13 to 17), the strength properties of the latter are optimized, wherein the temperature treatment encompasses heating and cooling.
  8. Crankshaft bearing bridge according to Claim 7, characterized in that the strength properties of the bearing covers (13 to 17) are increased by means of the targeted provision of first and second cooling elements (37 and 38) on said bearing covers (13 to 17) during the production of the crankshaft bearing bridge (11).
  9. Crankshaft bearing bridge according to Claim 8, characterized in that the first cooling elements (37) are provided on side walls (39 and 40) of the bearing covers (13 and 17).
  10. Crankshaft bearing bridge according to Claims 1 and 9, characterized in that the second cooling elements (38) are mounted on both sides of the bore halves (18) of the bearing covers (13 to 17).
  11. Crankshaft bearing bridge according to Claim 1, characterized in that weight-reducing recesses (41) are formed in the bearing covers (13 to 17) of the crankshaft bearing bridge (11).
  12. Crankshaft bearing bridge according to Claim 11, characterized in that the weight-reducing recesses (41) are provided below the bore halves (18) in the bearing covers (13 to 17).
  13. Crankshaft bearing bridge according to Claim 12, characterized in that the weight-reducing recesses (41) are of U-shaped cross section.
  14. Crankshaft bearing bridge according to one or more of the preceding claims, characterized in that the weight-reducing recesses (41) extend between through bores (42 and 43) for fastening screws of the crankshaft bearing bridge (11).
EP05022960A 2004-12-22 2005-10-21 Crankshaft bearing beam for an internal combustion engine Ceased EP1674703B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004061672A DE102004061672A1 (en) 2004-12-22 2004-12-22 Crankshaft bearing bridge for an internal combustion engine

Publications (3)

Publication Number Publication Date
EP1674703A2 EP1674703A2 (en) 2006-06-28
EP1674703A3 EP1674703A3 (en) 2009-12-16
EP1674703B1 true EP1674703B1 (en) 2011-04-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05022960A Ceased EP1674703B1 (en) 2004-12-22 2005-10-21 Crankshaft bearing beam for an internal combustion engine

Country Status (4)

Country Link
US (1) US20060130799A1 (en)
EP (1) EP1674703B1 (en)
JP (1) JP2006177349A (en)
DE (2) DE102004061672A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004061684B4 (en) * 2004-12-22 2011-09-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Crankshaft bearing for an internal combustion engine
JP6939485B2 (en) * 2017-12-04 2021-09-22 トヨタ自動車株式会社 cylinder head
CN112610329A (en) * 2020-11-25 2021-04-06 郝继先 Opposed type diesel internal combustion engine with special-shaped cranks

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JPS6320847Y2 (en) 1980-04-21 1988-06-09
US4519348A (en) * 1983-04-21 1985-05-28 Edward Hamilton Oil pan and windage tray for high performance engines
DE3426208C1 (en) 1984-07-17 1986-03-06 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Crankshaft bearings for internal combustion engines
DE3837834C1 (en) * 1988-11-08 1989-06-01 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De Crankshaft bearing for an internal combustion engine
DE4001470A1 (en) * 1990-01-19 1991-07-25 Porsche Ag IC engine with oil barrier tray - which has integral seal for gap in oil sump
DE4330565C1 (en) 1993-09-09 1994-08-18 Porsche Ag Crankshaft bearing
DE19619974C1 (en) * 1996-05-17 1997-11-20 Daimler Benz Ag Crankcase of an internal combustion engine
JP3552414B2 (en) * 1996-08-27 2004-08-11 日産自動車株式会社 Oil pan device for internal combustion engine
CA2218304C (en) * 1996-10-16 2001-04-24 Honda Giken Kogyo Kabushiki Kaisha (Also Trading As Honda Motor Co., Ltd .) Engine for vehicle
AT407185B (en) * 1998-06-03 2001-01-25 Miba Sintermetall Ag ALLOY CRANKCASE FOR A COMBUSTION ENGINE
IT1316226B1 (en) * 1999-10-06 2003-04-03 Daimler Chrysler Ag OIL CONVEYING DEVICE IN THE INTERNAL COMBUSTION ENGINE OIL CUP.
KR100412841B1 (en) * 2001-07-23 2003-12-31 현대자동차주식회사 a ladder frame of engine
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DE10357096B4 (en) * 2003-03-01 2014-05-15 Bayerische Motoren Werke Aktiengesellschaft Monolithic aluminum cylinder crankcase for heavy-duty diesel engines
DE102004061684B4 (en) * 2004-12-22 2011-09-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Crankshaft bearing for an internal combustion engine
US20070283918A1 (en) * 2006-06-07 2007-12-13 Ford Global Technologies, Llc Combination Bearing Beam and Crankshaft-Interactive Oil Management Device for Internal Combustion Engine

Also Published As

Publication number Publication date
JP2006177349A (en) 2006-07-06
EP1674703A3 (en) 2009-12-16
DE102004061672A1 (en) 2006-07-13
EP1674703A2 (en) 2006-06-28
US20060130799A1 (en) 2006-06-22
DE502005011271D1 (en) 2011-06-01

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