WO2006082004A1 - Crankcase of a reciprocating internal combustion engine - Google Patents

Crankcase of a reciprocating internal combustion engine Download PDF

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Publication number
WO2006082004A1
WO2006082004A1 PCT/EP2006/000764 EP2006000764W WO2006082004A1 WO 2006082004 A1 WO2006082004 A1 WO 2006082004A1 EP 2006000764 W EP2006000764 W EP 2006000764W WO 2006082004 A1 WO2006082004 A1 WO 2006082004A1
Authority
WO
WIPO (PCT)
Prior art keywords
crankcase
lead frame
internal combustion
combustion engine
bulkheads
Prior art date
Application number
PCT/EP2006/000764
Other languages
German (de)
French (fr)
Inventor
Frank Georg Haubner
Original Assignee
Fev Motorentechnik Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fev Motorentechnik Gmbh filed Critical Fev Motorentechnik Gmbh
Publication of WO2006082004A1 publication Critical patent/WO2006082004A1/en

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Classifications

    • 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
    • F02F7/0002—Cylinder arrangements
    • F02F7/0007—Crankcases of engines with cylinders in line

Definitions

  • the invention relates to a crankcase of a reciprocating internal combustion engine according to the preamble of claim 1.
  • Per bulkhead usually two screws are used, which are symmetrical to the main axis of the lead frame and so that they are arranged to the crankshaft axis.
  • this type of screwing on both sides of the bearing cap does not provide optimal rigidity and allows only an incomplete recording of the moments on the main bearing.
  • the object of the invention is to provide a crankcase of a reciprocating internal combustion engine according to the preamble of claim 1, wherein there is an improved rigidity and recording of the moments on the main bearings.
  • crankcase of a reciprocating internal combustion engine which is screwed to a lead frame via longitudinal flanges, has a series of cylinder bores and is divided between the cylinder bores through bulkheads, the main bearing caps for supporting a crank mechanism, provided that the bulkheads each adjacent to the respective longitudinal flange through a widened to the adjacent crankcase side wall and the bulkhead widened screw and the screw with threaded holes for screwing the lead frame are provided.
  • crankcase for a reciprocating internal combustion engine The invention will be explained in more detail below with reference to an embodiment of a crankcase for a reciprocating internal combustion engine.
  • Fig. 1 shows a detail and schematically shown from below an embodiment of a crankcase.
  • Fig. 2 shows the crankcase in the view of Fig. 1 with underneath arranged lead frame.
  • crankcase 1 shown comprises at its opposite side walls 2, which terminate at the bottom of the crankcase 1 in each case a longitudinal flange 3, on which a particular inner lead frame 4 (indicated by dashed lines) is flanged.
  • the crankcase 1 comprises a series of mutually spaced cylinder bores 5, between which there are arranged bulkhead walls 6, in which main bearing caps 7 for receiving bearings of a main axis defining crankshaft are formed.
  • the transverse to the main axis extending bulkheads 6 are integrally formed adjacent to the respective longitudinal flange 3 with a screw 8, which is also connected to the corresponding side wall 2.
  • the widening areas 9 use the interior of the crankcase 1, which leave the counterweights of this unused after installation of a crank mechanism.
  • the respective longitudinal flange 3 in the bulkhead 6 to leave an oil return passage 11 for the return of engine oil from the cylinder head, so that it is located between the two threaded holes 10 at the lateral end of the respective bulkhead 6.
  • the oil return passage 11 is formed in section substantially in the form of an inwardly directed, equilateral triangle. Since the oil return channels 11 can be realized during the casting of the crankcase 1, this also results in a stiff and weight-optimized design.
  • the lead frame 4 is shown arranged on the underside of the crankcase 1.
  • the lead frame 4 has holes 10a corresponding to the threaded holes 10, oil return channels 11a corresponding to the oil return channels 11 and additionally window 12 for drainage of oil in a located under the lead frame 4 oil pan adjacent to not visible in this illustration ⁇ labstreifem on the crankcase 1 side facing of the lead frame 4 are provided.

Abstract

The invention relates to a crankcase of a reciprocating internal combustion engine. Said crankcase can be screwed to a ladder frame (4) via longitudinal flanges (3), is provided with a series of cylinder bores (4), and is subdivided between the cylinder bores (5) by means of bulkheads (6) which comprise main bearing caps (7) for mounting a crank mechanism. The bulkheads (6) are expanded next to the respective longitudinal flange (3) with the aid of a screw button (8) that is connected to the adjacent sidewall (2) of the crankcase and the bulkhead (6) while the screw buttons (8) are provided with threaded bores (10) for screwing on the ladder frame (4).

Description

Kurbelgehäuse eines Hubkolbenverbrennungsmotors Crankcase of a reciprocating internal combustion engine
Die Erfindung betrifft ein Kurbelgehäuseeines Hubkolbenverbrennungsmotors nach dem Oberbegriff des Anspruchs 1.The invention relates to a crankcase of a reciprocating internal combustion engine according to the preamble of claim 1.
Es ist bekannt, zwischen dem Kurbelgehäuse und der Ölwanne eines Hubkolbenverbrennungsmotors, insbesondere eines Dieselmotors mit Direkteinspritzung, einen sogenannten Leiterrahmen vorzusehen, wobei sich die Stoßstelle zwischen Kurbelgehäuse und Leiterrahmen auf Höhe der Mitte der Kurbelwellenlager befindet. Der Leiterrahmen bildet das Kurbelgehäuseunterteil und wird verwendet, um eine hohe Steifigkeit des Antriebsaggregats und damit eine möglichst geringe Schwingungsanregung anderer Fahrzeugbauteile zu erreichen, so daß insoweit vom Fahrer bemerkbare Vibrationen und ein ungünstiges Schallabstrahlungsverhalten vermieden werden, die sonst infolge von hohen Zünddrücken und entsprechend hohen Lagerkräften erzeugt werden. Die Verschraubung zwischen Leiterrahmen und Kurbelgehäuse erfolgt im Bereich von Schottwänden und ist somit für die ,Schottwandbreite bestimmend. Pro Schottwand werden üblicherweise zwei Schrauben verwendet, die symmetrisch zur Hauptachse des Leiterrahmens und damit zur Kurbelwellenachse angeordnet sind. Diese Art der Verschraubung zu beiden Seiten der Lagerkappe bietet jedoch keine optimale Steifigkeit und erlaubt nur eine unvollständige Aufnahme der Momente am Hauptlager.It is known to provide a so-called lead frame between the crankcase and the oil pan of a reciprocating internal combustion engine, in particular a diesel engine with direct injection, wherein the joint between the crankcase and the lead frame is at the level of the center of the crankshaft bearing. The lead frame forms the lower crankcase and is used to achieve high rigidity of the drive unit and thus the lowest possible vibration excitation of other vehicle components, so far as the driver noticeable vibrations and unfavorable Schallabstrahlungsverhalten be avoided, otherwise due to high ignition pressures and correspondingly high bearing forces be generated. The screw connection between the ladder frame and the crankcase takes place in the area of bulkhead walls and is thus decisive for the bulkhead width. Per bulkhead usually two screws are used, which are symmetrical to the main axis of the lead frame and so that they are arranged to the crankshaft axis. However, this type of screwing on both sides of the bearing cap does not provide optimal rigidity and allows only an incomplete recording of the moments on the main bearing.
Aufgabe der Erfindung ist es, ein Kurbelgehäuse eines Hubkolbenverbrennungsmotors nach dem Oberbegriff des Anspruchs 1 zu schaffen, bei dem sich eine verbesserte Steifigkeit und Aufnahme der Momente an den Hauptlagern ergibt.The object of the invention is to provide a crankcase of a reciprocating internal combustion engine according to the preamble of claim 1, wherein there is an improved rigidity and recording of the moments on the main bearings.
Diese Aufgabe wird entsprechend den Merkmalen des Anspruchs 1 gelöst.This object is achieved according to the features of claim 1.
Dementsprechend ist bei einem Kurbelgehäuse eines Hubkolbenverbrennungsmotors, das mit einem Leiterrahmen über Längsflansche verschraubbar ist, eine Reihe von Zylinderbohrungen aufweist und zwischen den Zylinderbohrungen durch Schottwände unterteilt ist, die Hauptlagerkappen zur Lagerung eines Kurbeltriebs besitzen, vorgesehen, daß die Schottwände jeweils benachbart zum jeweiligen Längsflansch durch einen an die benachbarte Kurbelgehäuseseitenwand und die Schottwand angebundenen Schraubenbutzen verbreitert und die Schraubenbutzen mit Gewindebohrungen zum Verschrauben des Leiterrahmens versehen sind.Accordingly, in a crankcase of a reciprocating internal combustion engine, which is screwed to a lead frame via longitudinal flanges, has a series of cylinder bores and is divided between the cylinder bores through bulkheads, the main bearing caps for supporting a crank mechanism, provided that the bulkheads each adjacent to the respective longitudinal flange through a widened to the adjacent crankcase side wall and the bulkhead widened screw and the screw with threaded holes for screwing the lead frame are provided.
Da die Schraubenbutzen mit ihren Gewindebohrungen an die Schottwand und an die Seitenwand des Kurbelgehäuses angebunden sind, werden die Schottwände versteift, wodurch sich eine steife und gewichtsoptimierte Auslegung des Kurbelgehäuses erreichen läßt. Hierdurch ergibt sich zudem ein verbessertes akustisches Verhalten. Weil die Verschraubungen nach innen verlegt sind, führt dies ferner zu einem sehr breiten, steifen Längsflansch mit entsprechend guter Abdichtmöglichkeit. Zudem können durch den Leiterrahmen in die Ölwanne führende Ölrücklaufkanäle für den Ölrücklauf vom Zylinderkopf zwischen den jeweils zwei Gewindebohrungen pro Schottwand angeordnet werden. Dies liefert insofern eine bauraumgünstige Anordnung und bewirkt eine vollständige Vermeidung einer Durchmischung der Luft/Ölwalze im Kurbeltrieb mit dem Gasvolumen der Ölwanne. Abgesehen davon ergibt sich hierdurch eine niedrige Austrittsposition für das zurückgelaufene Öl in die Ölwanne in der Nähe des Ölspiegels, wodurch eine Ölverschäumung sowie Panschverluste vermieden und der Luftgehalt im Motoröl reduziert wird. Abgesehen davon wird von den die Schottwände verbreiterten Schraubenbutzen derjenige Bereich des Innenraums des Kurbelgehäuses genutzt, der von den rotierenden Gegengewichten des Kurbeltriebs ansonsten wegen ihres geringeren Durchmessers ungenutzt bleibt.Since the Schraubenbutzen are tethered with their threaded holes on the bulkhead and the side wall of the crankcase, the bulkhead walls are stiffened, which can achieve a stiff and weight-optimized design of the crankcase. This also results in an improved acoustic behavior. Because the screwed connections are laid inwards, this also leads to a very wide, stiff longitudinal flange with a correspondingly good sealing capability. In addition, leading through the ladder frame in the oil pan leading oil return channels for the oil return from the cylinder head between the two threaded holes per bulkhead can be arranged. This provides a space-saving arrangement and causes a complete avoidance of mixing the air / oil roller in the crank mechanism with the gas volume of the oil pan. Apart from this, this results in a low exit position for the oil running back into the oil pan in the vicinity of the oil level, whereby a Ölverschäumung as well Panschverluste avoided and the air content in the engine oil is reduced. Apart from that of the bulkheads widened Schraubenbutzen that portion of the interior of the crankcase is used, which remains unused by the rotating counterweights of the crank mechanism otherwise because of their smaller diameter.
Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention are described in the following description and the dependent claims.
Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels eines Kurbelgehäuses für einen Hubkolbenverbrennungsmotor näher erläutert.The invention will be explained in more detail below with reference to an embodiment of a crankcase for a reciprocating internal combustion engine.
Fig. 1 zeigt ausschnittweise und schematisch von unten dargestellt eine Ausführungsform eines Kurbelgehäuses.Fig. 1 shows a detail and schematically shown from below an embodiment of a crankcase.
Fig. 2 zeigt das Kurbelgehäuse in der Ansicht von Fig. 1 mit darunter angeordnetem Leiterrahmen.Fig. 2 shows the crankcase in the view of Fig. 1 with underneath arranged lead frame.
Das dargestellte Kurbelgehäuse 1 umfaßt an seinen gegenüberliegenden Seitenwänden 2, die an der Unterseite des Kurbelgehäuses 1 in jeweils einem Längsflansch 3 enden, an dem ein insbesondere innen liegender Leiterrahmen 4 (gestrichelt angedeutet) angeflanscht wird.The crankcase 1 shown comprises at its opposite side walls 2, which terminate at the bottom of the crankcase 1 in each case a longitudinal flange 3, on which a particular inner lead frame 4 (indicated by dashed lines) is flanged.
Das Kurbelgehäuse 1 umfaßt eine Reihe von zueinander beabstandeten Zylinderbohrungen 5, wobei hierzwischen Schottwände 6 angeordnet sind, in denen Hauptlagerkappen 7 zur Aufnahme von Lagern einer eine Hauptachse definierenden Kurbelwelle ausgebildet sind. Die quer zur Hauptachse verlaufenden Schottwände 6 sind benachbart zum jeweiligen Längsflansch 3 mit einem Schraubenbutzen 8 einstückig ausgebildet, der zugleich an die entsprechende Seitenwand 2 angebunden ist. Hierdurch ergeben sich die Schottwand 6 verbreiternde, zwickelartige Bereiche 9 mit Gewindebohrungen 10 zur Aufnahme von Schrauben zum Befestigen des Leiterrahmens 4, die so wenigstens teilweise in das Kurbelgehäuse 1 versenkt werden können. Die verbreiternden Bereiche 9 nutzen den Innenraum des Kurbelgehäuses 1 , den nach Einbau eines Kurbeltriebs die Gegengewichte hiervon ungenutzt lassen.The crankcase 1 comprises a series of mutually spaced cylinder bores 5, between which there are arranged bulkhead walls 6, in which main bearing caps 7 for receiving bearings of a main axis defining crankshaft are formed. The transverse to the main axis extending bulkheads 6 are integrally formed adjacent to the respective longitudinal flange 3 with a screw 8, which is also connected to the corresponding side wall 2. This results in the bulkhead 6 widening, gore-like areas 9 with threaded holes 10 for receiving screws for securing the lead frame 4, which can be at least partially sunk into the crankcase 1. The widening areas 9 use the interior of the crankcase 1, which leave the counterweights of this unused after installation of a crank mechanism.
Hierbei ist es zweckmäßig, zwischen der jeweiligen Hauptlagerkappe 7 und -A-It is expedient between the respective main bearing cap 7 and -A-
dem jeweiligen Längsflansch 3 in der Schottwand 6 einen Ölrücklaufkanal 11 für den Rücklauf von Motoröl vom Zylinderkopf münden zu lassen, so daß sich dieser zwischen den beiden Gewindebohrungen 10 am seitlichen Ende der jeweiligen Schottwand 6 befindet. Beim dargestellten Ausführungsbeispiel ist der Ölrücklaufkanal 11 im Schnitt im wesentlichen in Form eines einwärts gerichteten, gleichseitigen Dreiecks ausgebildet. Da die Ölrücklaufkanäle 11 beim Gießen des Kurbelgehäuses 1 realisiert werden können, ergibt sich auch hierfür eine steife und gewichtsmäßig optimierbare Auslegung.the respective longitudinal flange 3 in the bulkhead 6 to leave an oil return passage 11 for the return of engine oil from the cylinder head, so that it is located between the two threaded holes 10 at the lateral end of the respective bulkhead 6. In the illustrated embodiment, the oil return passage 11 is formed in section substantially in the form of an inwardly directed, equilateral triangle. Since the oil return channels 11 can be realized during the casting of the crankcase 1, this also results in a stiff and weight-optimized design.
In Fig. 2 ist der Leiterrahmen 4 an der Unterseite des Kurbelgehäuses 1 angeordnet dargestellt. Der Leiterrahmen 4 besitzt Bohrungen 10a entsprechend den Gewindebohrungen 10, Ölrücklaufkanäle 11a entsprechend den Ölrücklaufkanälen 11 sowie zusätzlich Fenster 12 zum Ablauf von Öl in eine unter dem Leiterrahmen 4 befindliche Ölwanne benachbart zu in dieser Darstellung nicht sichtbaren Ölabstreifem, die an der dem Kurbelgehäuse 1 zugewandten Seite des Leiterrahmens 4 vorgesehen sind. In Fig. 2, the lead frame 4 is shown arranged on the underside of the crankcase 1. The lead frame 4 has holes 10a corresponding to the threaded holes 10, oil return channels 11a corresponding to the oil return channels 11 and additionally window 12 for drainage of oil in a located under the lead frame 4 oil pan adjacent to not visible in this illustration Ölabstreifem on the crankcase 1 side facing of the lead frame 4 are provided.

Claims

Patentansprüche claims
1. Kurbelgehäuse eines Hubkolbenverbrennungsmotors, das mit einem Leiterrahmen (4) über Längsflansche (3) verschraubbar ist, eine Reihe von Zylinderbohrungen (4) aufweist und zwischen den Zylinderbohrungen (5) durch Schottwände (6) unterteilt ist, die Hauptlagerkappen (7) zur Lagerung eines Kurbeltriebs besitzen, dadurch gekennzeichnet, daß die Schottwände (6) jeweils benachbart zum jeweiligen Längsflansch (3) durch einen an die benachbarte Kurbelgehäuseseitenwand (2) und die Schottwand (6) angebundenen Schrauben- butzen (8) verbreitert und die Schraubenbutzen (8) mit Gewindebohrungen (10) zum Verschrauben des Leiterrahmens (4) versehen sind.A crankcase of a reciprocating internal combustion engine, which is screwed to a lead frame (4) via longitudinal flanges (3), a series of cylinder bores (4) and is divided between the cylinder bores (5) by bulkheads (6), the main bearing caps (7) Have storage of a crank mechanism, characterized in that the bulkheads (6) each widened adjacent to the respective longitudinal flange (3) by an adjacent to the crankcase side wall (2) and the bulkhead (6) connected to the screw (8) and the Schraubenbutzen (8 ) are provided with threaded holes (10) for screwing the lead frame (4).
2. Kurbelgehäuse nach Anspruch 1 , dadurch gekennzeichnet, daß zwischen jeweils zwei Gewindebohrungen (10) ein Ölrücklaufkanal (11) für den Rücklauf von Motoröl vom Zylinderkopf mündet.2. Crankcase according to claim 1, characterized in that between each two threaded bores (10) an oil return passage (11) for the return of engine oil flows from the cylinder head.
3. Kurbelgehäuse nach Anspruch 2, dadurch gekennzeichnet, daß der Ölrücklaufkanal (11) einen im wesentlichen dreieckigen Querschnitt aufweist.3. Crankcase according to claim 2, characterized in that the oil return channel (11) has a substantially triangular cross-section.
4. Kurbelgehäuse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Leiterrahmen (4) ein innenliegender Leiterrahmen ist. 4. Crankcase according to one of claims 1 to 3, characterized in that the lead frame (4) is an inner lead frame.
PCT/EP2006/000764 2005-02-02 2006-01-30 Crankcase of a reciprocating internal combustion engine WO2006082004A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510004701 DE102005004701A1 (en) 2005-02-02 2005-02-02 Crankcase of a reciprocating internal combustion engine
DE102005004701.7 2005-02-02

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WO2006082004A1 true WO2006082004A1 (en) 2006-08-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019004449A1 (en) 2019-06-26 2019-09-12 FEV Europe GmbH crankcase

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008059620A1 (en) 2008-11-28 2009-12-03 Audi Ag Cylinder crank case for internal combustion engine, has crankshaft, two V-shaped cylinder banks having multiple cylinders, bearing blocks for crankshaft, and bulkheads arranged above part of bearing blocks

Citations (5)

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Publication number Priority date Publication date Assignee Title
US4237847A (en) * 1979-03-21 1980-12-09 Cummins Engine Company, Inc. Composite engine block having high strength to weight ratio
EP0232570A1 (en) * 1984-09-18 1987-08-19 Ford Motor Company Limited An internal combustion engine
US5009205A (en) * 1988-11-09 1991-04-23 Mazda Motor Corporation Crankshaft supporting structure for an internal combustion engine
EP0435847A1 (en) * 1989-12-22 1991-07-03 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Reciprocating internal combustion piston engine
DE19925096A1 (en) * 1998-06-10 1999-12-23 Avl List Gmbh Crankcase for internal combustion engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237847A (en) * 1979-03-21 1980-12-09 Cummins Engine Company, Inc. Composite engine block having high strength to weight ratio
EP0232570A1 (en) * 1984-09-18 1987-08-19 Ford Motor Company Limited An internal combustion engine
US5009205A (en) * 1988-11-09 1991-04-23 Mazda Motor Corporation Crankshaft supporting structure for an internal combustion engine
EP0435847A1 (en) * 1989-12-22 1991-07-03 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Reciprocating internal combustion piston engine
DE19925096A1 (en) * 1998-06-10 1999-12-23 Avl List Gmbh Crankcase for internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019004449A1 (en) 2019-06-26 2019-09-12 FEV Europe GmbH crankcase
DE102020003368A1 (en) 2019-06-26 2020-07-30 FEV Europe GmbH Crankcase

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