EP2738377B1 - Process for manufacturing a cylinder crankcase - Google Patents

Process for manufacturing a cylinder crankcase Download PDF

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Publication number
EP2738377B1
EP2738377B1 EP13193129.7A EP13193129A EP2738377B1 EP 2738377 B1 EP2738377 B1 EP 2738377B1 EP 13193129 A EP13193129 A EP 13193129A EP 2738377 B1 EP2738377 B1 EP 2738377B1
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EP
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Prior art keywords
cylinder
section
producing
cylinder crankcase
crankcase
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EP13193129.7A
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German (de)
French (fr)
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EP2738377A2 (en
EP2738377A3 (en
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Herbert Dr. Möding
Christian Dr. Klimesch
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KS Huayu Alutech GmbH
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KS Huayu Alutech GmbH
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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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/16—Cylinder liners of wet type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/101—Permanent cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons

Definitions

  • the invention relates to a method for producing a cylinder crankcase with wet, hanging bushings, in which a casting mold is closed, at least one steel quill is inserted into the casting mold to form at least one cylinder space, the casting mold is filled with a molten metal, which is at least one steel quill If the melt solidifies again, the casting mold is opened, the cylinder crankcase is removed from the casting mold and then a wet hanging bushing is inserted into each cylinder space formed by the one or more steel quills.
  • sockets are wet sockets, in which the outer wall of the socket forms a delimitation of the coolant channel. These sockets are thus at least partially in direct contact with the coolant. It is between standing and hanging sockets. Hanging bushings rest with their collar on a circumferential support surface which is formed above the coolant jacket, so that the coolant channel is arranged in an undercut area viewed from the opening of the cylinder. For this reason, water jacket cores are used to form the cavity for the coolant channel even when wet hanging bushings are used.
  • a crankcase is for example from the DE 34 13 971 A1 known. This training enables the production of short motors with very good cooling properties.
  • a cylinder crankcase with wet hanging bushings in which the cylinder space has gradations, so that the diameter gradually becomes smaller in the direction of the interior.
  • Such a space can be formed by appropriately shaped quills.
  • a liner is inserted into the cylinder space, which has indentations on its outer circumference, so that coolant can flow through the indentations between the wall delimiting the cylinder space and the socket.
  • the lower part of the cylinder crankcase is machined to an exact final dimension into which the bushing fits exactly.
  • a method for producing a cylinder liner in which first the liner is cast and then the outer wall of the liner is mechanically machined to form a coolant channel between the liner and the cylinder crankcase.
  • a wet hanging bush which is composed of two cylindrical bodies and is inserted into a cylinder crankcase with cylinders with three different inner diameters.
  • the object is therefore to create a method for producing a cylinder crankcase with which a complete flow around each cylinder can be achieved, whereby no additional cores for the formation of the water jacket are required during production and at the same time the largest possible cross-section for safe flow each cylinder should be available.
  • the wall thicknesses of the bushings should be kept as low as possible in order to reduce the weight.
  • a method for producing a cylinder crankcase with the features of the main claim In that, before the bushings are inserted, the side walls delimiting the at least one cylinder space are mechanically machined, a first section of larger diameter being produced between a second axial section and a third axial section of smaller diameter, which are formed by the steel quill, a free space is created for the formation of a coolant jacket. This can be adapted in its free cross-section to the required coolant flow so that an optimal cooling effect can be achieved. There is no need to use water jacket cores. Further processing of the bushes from the outside can also be dispensed with.
  • the side walls delimiting the at least one cylinder space are mechanically machined, a fourth section with a larger diameter being produced between the second axial section with a smaller diameter and the open side of the at least one cylinder space.
  • This serves to accommodate the collar of the bushing so that it has a sufficient bearing surface and the collar can be produced with the necessary wall thickness. This facilitates the positioning and subsequent fastening of the socket.
  • the mechanical processing is preferably carried out by cutting by grinding, turning or milling. These processes offer very precise machining that can be carried out by machine.
  • each bushing has a sealing section in which at least one groove is formed, in which a sealing ring is inserted before the bushing is inserted into the cylinder space. This ensures complete sealing of the resulting coolant channel even when using bushings that are not arranged in the lower area via a sliding fit in the cylinder space.
  • the at least one bushing is advantageously inserted into the cylinder chamber in such a way that a collar of the bushing rests on the mechanically machined axial bearing surface and the sealing section rests against the third section, whereby the axial and radial position of the bushing in the cylinder crankcase is exactly defined.
  • a coolant channel is preferably delimited radially by the outer walls of the bushes and outside the web area by the first axial section with a larger diameter of the cylinder chambers and the outer walls of the bushes.
  • holes for guide bushings or guide pins are made in the cylinder crankcase, which are different from the Extend surface parallel to the sockets.
  • a method for producing a cylinder crankcase is thus created with which, even when the cylinders are very close to one another, circumferential cooling is also ensured in the web area.
  • the requirement for the accuracy of the forms is reduced, since the bushings can be placed precisely thanks to the mechanical processing.
  • relatively thin-walled, wet, hanging bushings can be used, which are directly washed around and thus cooled, so that a significantly reduced distortion follows. There is no need to manufacture, insert and then position water jacket cores.
  • the Figure 1 shows a cylinder crankcase 10 with four cylinders 12 arranged in series, which are only a small distance have to each other.
  • the cylinders 12 formed in this cylinder crankcase 10 are delimited by bushings 16 inserted into a cylinder space 14 of the cast cylinder crankcase 10.
  • the bushes 16 are usually made of gray cast iron or steel, with bushings made of wear-resistant light metal alloys also being able to be used to reduce weight, while the cylinder crankcase 10 is cast from a light metal, in particular an aluminum alloy. Since such a light metal housing is exposed to increased wear in the area of the running surfaces of the pistons, the use of wear-resistant bushes 16 has proven itself.
  • a coolant channel 18 surrounding each individual cylinder 12 is formed around the bushes 16 and ensures sufficient heat dissipation during operation of the internal combustion engine.
  • the essentially hollow-cylindrical bushes 16 rest with a collar 20 on an axial bearing surface 22 formed on the cylinder crankcase 10, so that the end of the bushes facing an open side 24 of the cylinder 12 is essentially the same height as a surface 26 of the cylinder crankcase 10 having.
  • a cylinder head gasket in between, a cylinder head can be fastened to the cylinder crankcase 10 in a sealed manner.
  • bores 27 are formed on the surface 26, which are formed on both sides next to the sockets 16 at the level of a web area 17 and extend downwards parallel to the sockets.
  • FIG 2 a section of the cylinder crankcase 10 in the region of a cylinder 12 in a casting mold 28 is shown.
  • the mold 28 consists of a fixed mold part 30 and a movable mold part 32, which is moved in the direction of the fixed mold part 30 to close the casting mold 28.
  • a steel quill 34 is inserted into the casting mold, which serves to form the cylinder space 14.
  • a light metal melt has been poured into the casting mold 28, it solidifies and forms the basic shape of the later cylinder crankcase 10.
  • the steel quill 34 is moved out of the mold again and the casting mold 28 is then opened.
  • the cast cylinder crankcase 10 is then removed from the casting mold 28.
  • a tool such as a milling cutter or a turning tool, is introduced into each cylinder space 14.
  • a tool such as a milling cutter or a turning tool
  • the side walls 36 delimiting the cylinder spaces 14 are machined, which, due to the steel quill 34, initially have a smooth cylindrical surface after casting.
  • the tool is used to provide a first axial section 38 of the cylinder space 14 with a larger diameter, which is axially smaller by a second section 40 of smaller diameter facing the open side 24 of the cylinder space 14 and a third section 44 facing a crankshaft space 42 Diameter is limited, which thus have a diameter corresponding to the steel quill 34.
  • the resulting axial bearing surface 22 on the second axial section 40 of smaller diameter can be mechanically, be processed, for example, by turning, milling or grinding, so that a smooth and flat support surface 22 is created.
  • the sleeve 16 also has an essentially straight hollow cylindrical shape which is interrupted only by the radially outwardly extending collar 20 at its end facing the open side 24 and two grooves 52 formed on an outer wall 48 in a sealing section 50 of the socket 16, the sealing section 50 at the opposite end of the socket 16 is trained.
  • a sealing ring 54 is arranged in each of these grooves 52, with both sealing rings 54 in the assembled state resting against the side wall 36 of the cylinder space 14 in the third axial section 44 of smaller diameter.
  • a centering plate 56 which is arranged radially between the second axial section 40 of smaller diameter and an area of the bush 16 adjoining the collar 20, also serves to center the bushes 16.
  • the bushing 16 can also have a smaller diameter in the area of the coolant guide.
  • this third section 44 should also be included in the mechanical processing in order to ensure a tight press fit all around. If necessary, the third axial section 44 can also be machined to improve the tightness when using sealing rings 54.
  • An axially acting seal can also be provided in the area of the bearing surface 22 or in the area of the second axial section 40 of smaller diameter.
  • the sockets 16 in the present exemplary embodiment do not lie circumferentially, but are designed to be flattened on two opposite sides. Two sockets 16 arranged adjacent to one another are in the web area 17 with these sides against one another and have no bearing surface in this circumferential area. This means that the coolant channel 18 in this area is not limited on one side by a side wall 36 of the cylinder chamber 14 and an outer wall 48 of the bushing 16, but by two opposite outer walls 48 of adjacent bushings 16, creating a very short cylinder crankcase 10.
  • the scope of protection is not limited to the exemplary embodiment described.
  • the method according to the invention can also be used for engines with larger cylinder spacings or other surfaces can be processed in different ways.
  • additional axial bores for connecting the coolant jacket of the cylinder crankcase to the cooling channels of the cylinder head could be provided in the bearing surfaces.
  • Further modifications are of course possible within the scope of the main claim.
  • the method according to the invention is suitable for different cylinder crankcases and different casting methods and casting molds according to the scope of protection of the appended claims.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Zylinderkurbelgehäuses mit nassen, hängenden Buchsen, bei dem eine Gießform geschlossen wird, mindestens eine Stahlpinole zur Bildung mindestens eines Zylinderraums in die Gießform eingefahren wird, die Gießform mit einer Metallschmelze gefüllt wird, die mindestens eine Stahlpinole nach dem Erstarren der Schmelze wieder ausgefahren wird, die Gießform geöffnet wird, das Zylinderkurbelgehäuse aus der Gießform entnommen wird und anschließend eine nasse hängende Buchse in jeden durch die eine oder mehreren Stahlpinolen gebildeten Zylinderräume eingesetzt wird.The invention relates to a method for producing a cylinder crankcase with wet, hanging bushings, in which a casting mold is closed, at least one steel quill is inserted into the casting mold to form at least one cylinder space, the casting mold is filled with a molten metal, which is at least one steel quill If the melt solidifies again, the casting mold is opened, the cylinder crankcase is removed from the casting mold and then a wet hanging bushing is inserted into each cylinder space formed by the one or more steel quills.

Bei Zylinderkurbelgehäusen muss eine ausreichende Kühlung jedes Zylinders zur Vermeidung einer thermischen Überlastung des Zylinderkurbelgehäuses sichergestellt werden. Zur Bildung entsprechender Kühlmittelkanäle um die Zylinder werden üblicherweise Wassermantelkerne verwendet, die nach dem Gießen aus dem Zylinderkurbelgehäuse ausgespült werden. Bei der Herstellung von Zylinderkurbelgehäusen aus Leichtmetall ist es bekannt, zur Sicherstellung einer ausreichenden Haltbarkeit der Laufflächen in die beim Gießen hergestellten Zylinderräume Laufbuchsen einzusetzen, welche diese Laufflächen bilden und beispielsweise aus Grauguss oder Stahl hergestellt werden.In the case of cylinder crankcases, sufficient cooling of each cylinder must be ensured to avoid thermal overloading of the cylinder crankcase. Water jacket cores, which are flushed out of the cylinder crankcase after casting, are usually used to form corresponding coolant channels around the cylinder. In the production of cylinder crankcases from light metal, it is known to use liners in the cylinder spaces produced during casting in order to ensure sufficient durability of the running surfaces, which liners form these running surfaces and are made, for example, of gray cast iron or steel.

Des Weiteren ist es bekannt, diese Buchsen als nasse Buchsen auszuführen, bei denen die Außenwand der Buchse eine Begrenzung des Kühlmittelkanals bildet. Diese Buchsen sind somit zumindest teilweise in direktem Kontakt mit dem Kühlmittel. Dabei wird zwischen stehenden und hängenden Buchsen unterschieden. Hängende Buchsen liegen mit ihrem Kragen auf einer umlaufenden Auflagefläche, welche oberhalb des Kühlmittelmantels gebildet wird, auf, so dass der Kühlmittelkanal in einem von der Öffnung der Zylinder aus betrachtet hinterschnittenen Bereich angeordnet ist. Daher werden auch bei der Verwendung nasser hängender Buchsen Wassermantelkerne zur Bildung des Hohlraums für den Kühlmittelkanal genutzt. Ein solches Kurbelgehäuse ist beispielsweise aus der DE 34 13 971 A1 bekannt. Diese Ausbildung ermöglicht die Herstellung kurzbauender Motoren mit sehr guten Kühleigenschaften.It is also known to design these sockets as wet sockets, in which the outer wall of the socket forms a delimitation of the coolant channel. These sockets are thus at least partially in direct contact with the coolant. It is between standing and hanging sockets. Hanging bushings rest with their collar on a circumferential support surface which is formed above the coolant jacket, so that the coolant channel is arranged in an undercut area viewed from the opening of the cylinder. For this reason, water jacket cores are used to form the cavity for the coolant channel even when wet hanging bushings are used. Such a crankcase is for example from the DE 34 13 971 A1 known. This training enables the production of short motors with very good cooling properties.

Des Weiteren ist aus der US 4,926,801 ein Zylinderkurbelgehäuse mit nassen hängenden Buchsen bekannt, bei dem der Zylinderraum Abstufungen aufweist, so dass der Durchmesser in Richtung des Innenraums absatzweise kleiner wird. Ein solcher Raum kann durch entsprechend geformte Pinolen gebildet werden. In den Zylinderraum wird eine Laufbuchse eingesetzt, welche an ihrem Außenumfang Einbuchtungen aufweist, so dass zwischen der den Zylinderraum begrenzenden Wand und der Buchse Kühlmittel durch die Einbuchtungen strömen kann. Für eine ausreichende Dichtigkeit dieses Kühlmittelkanals in Richtung des Innenraums wird der untere Teil des Zylinderkurbelgehäuses auf ein genaues Endmaß, in welches die Buchse exakt passt, bearbeitet.Furthermore, from the U.S. 4,926,801 a cylinder crankcase with wet hanging bushings is known, in which the cylinder space has gradations, so that the diameter gradually becomes smaller in the direction of the interior. Such a space can be formed by appropriately shaped quills. A liner is inserted into the cylinder space, which has indentations on its outer circumference, so that coolant can flow through the indentations between the wall delimiting the cylinder space and the socket. For a sufficient tightness of this coolant channel in the direction of the interior, the lower part of the cylinder crankcase is machined to an exact final dimension into which the bushing fits exactly.

Zusätzlich ist aus der WO 2007/109766 A2 ein Verfahren zur Herstellung einer Zylinderlaufbuchse bekannt, bei dem zunächst die Laufbuchse gegossen wird und anschließend die Außenwand der Buchse zur Ausbildung eines Kühlmittelkanals zwischen Buchse und Zylinderkurbelgehäuse mechanisch bearbeitet wird.In addition, from the WO 2007/109766 A2 a method for producing a cylinder liner is known in which first the liner is cast and then the outer wall of the liner is mechanically machined to form a coolant channel between the liner and the cylinder crankcase.

Auch ist aus der JP 61-255246 A eine nasse hängende Buchse bekannt, die aus zwei zylinderischen Körpern zusammengesetzt wird und in ein Zylinderkurbelgehäuse mit Zylindern mit drei verschiedenen Innendurchmessern eingesetzt wird.Also is from the JP 61-255246 A a wet hanging bush is known which is composed of two cylindrical bodies and is inserted into a cylinder crankcase with cylinders with three different inner diameters.

Des Weiteren offenbart die DE 10 2005 018 200 A1 ein Verfahren zum Gießen von Monoblock-Zylinderkurbelgehäusen, bei dem zur Bildung der Zylinderräume Stahlpinolen in die Gussform ein- und ausgefahren werden. Ein Wassermantel zwischen den Zylindern ist nicht vorgesehenFurthermore, the DE 10 2005 018 200 A1 a process for casting monoblock cylinder crankcases, in which steel quills are moved into and out of the casting mold to form the cylinder spaces. A water jacket between the cylinders is not provided

Aus Dokument JP S61 255246 ist ein weiteres Zylinderkurbelgehäuse mit nassen hängenden Buchsen bekannt.From document JP S61 255246 Another cylinder crankcase with wet hanging bushings is known.

Nachteilig an den genannten bekannten Verfahren ist, dass entweder ein zusätzlicher Kern hergestellt, eingelegt und wieder ausgespült werden muss, was besonders im Druckgussverfahren einen erheblichen Aufwand bedeutet, da konventionelle Sandkerne nicht verwendet werden können, oder relativ dickwandige Buchsen verwendet werden müssen, da ausreichend Material für die mechanische Bearbeitung der Buchse zur Verfügung stehen muss, um einerseits eine ausreichende Festigkeit der Buchse im Betrieb gewährleisten zu können und andererseits einen ausreichenden Querschnitt für die Kühlflüssigkeit zur Verfügung stellen zu können.The disadvantage of the known methods mentioned is that either an additional core has to be produced, inserted and rinsed out again, which is a considerable effort, especially in the die-casting process, since conventional sand cores cannot be used, or relatively thick-walled bushings have to be used because there is sufficient material must be available for the mechanical processing of the bushing, on the one hand, to be able to ensure sufficient strength of the bushing during operation and, on the other hand, to be able to provide a sufficient cross-section for the cooling liquid.

Es stellt sich daher die Aufgabe, ein Verfahren zur Herstellung eines Zylinderkurbelgehäuses zu schaffen, mit dem eine vollständige Umströmung jedes Zylinders erreicht werden kann, wobei bei der Herstellung keine zusätzlichen Kerne zur Ausbildung des Wassermantels benötigt werden sollen und gleichzeitig ein möglichst großer Querschnitt zur sicheren Umströmung jedes Zylinders zur Verfügung stehen soll. Die Wandstärken der Buchsen sollen dabei zur Verringerung des Gewichts möglichst gering gehalten werden.The object is therefore to create a method for producing a cylinder crankcase with which a complete flow around each cylinder can be achieved, whereby no additional cores for the formation of the water jacket are required during production and at the same time the largest possible cross-section for safe flow each cylinder should be available. The wall thicknesses of the bushings should be kept as low as possible in order to reduce the weight.

Diese Aufgabe wird durch ein Verfahren zur Herstellung eines Zylinderkurbelgehäuses mit den Merkmalen des Hauptanspruchs gelöst. Dadurch, dass vor dem Einsetzen der Buchsen die den mindestens einen Zylinderraum begrenzenden Seitenwände mechanisch bearbeitet werden, wobei ein erster Abschnitt größeren Durchmessers zwischen einem zweiten axialen Abschnitt und einem dritten axialen Abschnitt kleineren Durchmessers, die durch die Stahlpinole gebildet werden, erzeugt wird, wird ein freier Raum zur Bildung eines Kühlmittelmantels geschaffen. Dieser kann in seinem freien Querschnitt an den geforderten Kühlmittelstrom angepasst werden, so dass eine optimale Kühlwirkung erreichbar ist. Die Notwendigkeit einer Verwendung von Wassermantelkernen entfällt. Auch kann auf eine weitere Bearbeitung der Buchsen von außen verzichtet werden.This object is achieved by a method for producing a cylinder crankcase with the features of the main claim. In that, before the bushings are inserted, the side walls delimiting the at least one cylinder space are mechanically machined, a first section of larger diameter being produced between a second axial section and a third axial section of smaller diameter, which are formed by the steel quill, a free space is created for the formation of a coolant jacket. This can be adapted in its free cross-section to the required coolant flow so that an optimal cooling effect can be achieved. There is no need to use water jacket cores. Further processing of the bushes from the outside can also be dispensed with.

Vorzugsweise werden vor dem Einsetzen der mindestens einen Buchse die den mindestens einen Zylinderraum begrenzenden Seitenwände mechanisch bearbeitet, wobei zwischen dem zweiten axialen Abschnitt mit kleinerem Durchmesser und der offenen Seite des mindestens einen Zylinderraums ein vierter Abschnitt mit größerem Durchmessers erzeugt wird. Dieser dient zur Aufnahme des Kragens der Buchse, so dass diese eine ausreichende Auflagefläche erhält und der Kragen in der notwendigen Wandstärke hergestellt werden kann. So wird die Positionierung und die anschließende Befestigung der Buchse erleichtert.Preferably, before the insertion of the at least one bushing, the side walls delimiting the at least one cylinder space are mechanically machined, a fourth section with a larger diameter being produced between the second axial section with a smaller diameter and the open side of the at least one cylinder space. This serves to accommodate the collar of the bushing so that it has a sufficient bearing surface and the collar can be produced with the necessary wall thickness. This facilitates the positioning and subsequent fastening of the socket.

Um eine noch genauere Positionierung der Buchse im Zylinderkurbelgehäuse zu erreichen, ist es vorteilhaft, eine zur offenen Seite des mindestens einen Zylinderraums gewandte axiale Auflagefläche des zweiten Abschnitts mechanisch zu bearbeiten, da auf diese Weise eine exakt plane Auflagefläche zu erreichen ist oder gegebenenfalls Bohrungen zur Befestigung der Buchsen am Zylinderkopf vorsehen zu können.In order to achieve an even more precise positioning of the bushing in the cylinder crankcase, it is advantageous to mechanically machine an axial bearing surface of the second section facing the open side of the at least one cylinder space, since in this way an exactly flat bearing surface can be achieved or, if necessary, bores for fastening to be able to provide the bushings on the cylinder head.

Wenn die den mindestens einen Zylinderraum begrenzenden Seitenwände im dritten axialen Abschnitt mechanisch auf ein Endmaß bearbeitet werden, ist eine exakte Passung der Buchse im unteren Bereich gewährleistet. So wird eine vollständige Dichtigkeit des Kühlmittelkanals zum Innern des Kurbelgehäuses sichergestellt.If the side walls delimiting the at least one cylinder space are mechanically machined to a final dimension in the third axial section, an exact fit of the bushing in the lower area is guaranteed. This ensures that the coolant duct is completely sealed to the interior of the crankcase.

Vorzugsweise erfolgt die mechanische Bearbeitung spanabhebend durch Schleifen, Drehen oder Fräsen. Diese Prozesse bieten eine sehr exakte, maschinell durchführbare Bearbeitung.The mechanical processing is preferably carried out by cutting by grinding, turning or milling. These processes offer very precise machining that can be carried out by machine.

In einer weiterführenden bevorzugten Ausführungsform weist jede Buchse einen Dichtabschnitt auf, in dem mindestens eine Nut ausgebildet wird, in der ein Dichtring eingelegt wird, bevor die Buchse in den Zylinderraum eingesetzt wird. Dies stellt die vollständige Dichtung des entstehenden Kühlmittelkanals auch bei Verwendung von Buchsen sicher, die im unteren Bereich nicht über eine Schiebepassung im Zylinderraum angeordnet sind.In a further preferred embodiment, each bushing has a sealing section in which at least one groove is formed, in which a sealing ring is inserted before the bushing is inserted into the cylinder space. This ensures complete sealing of the resulting coolant channel even when using bushings that are not arranged in the lower area via a sliding fit in the cylinder space.

Entsprechend wird die mindestens eine Buchse vorteilhafterweise derart in den Zylinderraum eingesetzt wird, dass ein Kragen der Buchse auf der mechanisch bearbeiteten axialen Auflagefläche aufliegt und der Dichtungsabschnitt am dritten Abschnitt anliegt, wodurch die axiale und radiale Position der Buchse im Zylinderkurbelgehäuse exakt definiert ist.Accordingly, the at least one bushing is advantageously inserted into the cylinder chamber in such a way that a collar of the bushing rests on the mechanically machined axial bearing surface and the sealing section rests against the third section, whereby the axial and radial position of the bushing in the cylinder crankcase is exactly defined.

Auch ist es von Vorteil, zwischen dem zweiten axialen Abschnitt des Zylinderraums und dem gegenüberliegenden Buchsenabschnitt ein Zentrierblech einzulegen, über welches die Buchse zentriert wird.It is also advantageous to insert a centering plate between the second axial section of the cylinder space and the opposite bushing section, by means of which the bushing is centered.

Vorzugsweise wird in einem Stegbereich zwischen zwei Zylinderräumen ein Kühlmittelkanal radial durch die Außenwände der Buchsen und außerhalb des Stegbereiches durch den ersten axialen Abschnitt mit größerem Durchmesser der Zylinderräume und die Außenwände der Buchsen begrenzt. So können sehr kurz bauende Zylinderkurbelgehäuse geschaffen werden, da zwischen den Buchsen keine Wand des Kurbelgehäuses angeordnet werden muss und dennoch ein Kühlmittelkanal geschaffen wird.In a web area between two cylinder chambers, a coolant channel is preferably delimited radially by the outer walls of the bushes and outside the web area by the first axial section with a larger diameter of the cylinder chambers and the outer walls of the bushes. In this way, cylinder crankcases with a very short construction can be created, since no wall of the crankcase has to be arranged between the sockets and a coolant channel is nevertheless created.

Vorteilhafterweise werden im Zylinderkurbelgehäuse Bohrungen für Führungsbuchsen oder Führungsstifte hergestellt, die sich von der Oberfläche parallel zu den Buchsen erstrecken. Durch ein Einstecken von Führungsbuchsen oder Führungsstiften in das Zylinderkurbelgehäuse und den gegenüberliegenden Zylinderkopf kann auf diese Weise die Stabilität des Motorblocks deutlich erhöht werden.Advantageously, holes for guide bushings or guide pins are made in the cylinder crankcase, which are different from the Extend surface parallel to the sockets. By inserting guide bushings or guide pins into the cylinder crankcase and the opposite cylinder head, the stability of the engine block can be significantly increased in this way.

Es wird somit ein Verfahren zur Herstellung eines Zylinderkurbelgehäuses geschaffen, mit dem auch bei sehr nah aneinander stehenden Zylindern dennoch eine umlaufende Kühlung auch im Stegbereich sichergestellt wird. Die Anforderung an die Genauigkeit der Formen sinkt, da die Buchsen durch die mechanische Bearbeitung exakt platziert werden können. Des Weiteren können relativ dünnwandige nasse hängende Buchsen verwendet werden, die direkt umspült und somit gekühlt werden, so dass ein signifikant verringerter Verzug folgt. Eine Herstellung und ein Einsetzen und anschließendes Positionieren von Wassermantelkernen entfällt.A method for producing a cylinder crankcase is thus created with which, even when the cylinders are very close to one another, circumferential cooling is also ensured in the web area. The requirement for the accuracy of the forms is reduced, since the bushings can be placed precisely thanks to the mechanical processing. Furthermore, relatively thin-walled, wet, hanging bushings can be used, which are directly washed around and thus cooled, so that a significantly reduced distortion follows. There is no need to manufacture, insert and then position water jacket cores.

Ein erfindungsgemäßes Verfahren wird beispielhaft anhand der Figuren im Folgenden beschrieben.

  • Figur 1 zeigt eine schematische Seitenansicht eines Zylinderkurbelgehäuses mit eingesetzten Buchsen und Kühlmittelkanal in perspektivischer Darstellung.
  • Figur 2 zeigt eine Seitenansicht eines Ausschnitts des Zylinderkurbelgehäuses an einem Zylinder in der Gießform in geschnittener Darstellung.
  • Figur 3 zeigt eine zeigt eine Seitenansicht des Zylinders des Zylinderkurbelgehäuses aus Figur 2 nach der Bearbeitung und mit eingesetzter Buchse in geschnittener Darstellung.
A method according to the invention is described below by way of example with reference to the figures.
  • Figure 1 shows a schematic side view of a cylinder crankcase with inserted sockets and coolant duct in a perspective illustration.
  • Figure 2 shows a side view of a detail of the cylinder crankcase on a cylinder in the casting mold in a sectional illustration.
  • Figure 3 FIG. 1 shows a side view of the cylinder of the cylinder crankcase from FIG Figure 2 after processing and with the bushing inserted in a cut view.

Die Figur 1 zeigt ein Zylinderkurbelgehäuse 10 mit vier in Reihe angeordneten Zylindern 12, welche lediglich einen geringen Abstand zueinander aufweisen. Die in diesem Zylinderkurbelgehäuse 10 ausgebildeten Zylinder 12 werden durch in einen Zylinderraum 14 des gegossenen Zylinderkurbelgehäuses 10 eingesetzte Buchsen 16 begrenzt. Die Buchsen 16 sind üblicherweise aus Grauguss oder aus Stahl hergestellt, wobei zur Gewichtsreduzierung auch Buchsen aus verschleißfesten Leichtmetalllegierungen verwendet werden können, während das Zylinderkurbelgehäuse 10 aus einem Leichtmetall, insbesondere aus einer Aluminiumlegierung gegossen wird. Da ein derartiges Leichtmetallgehäuse im Bereich der Laufflächen der Kolben einem erhöhten Verschleiß ausgesetzt ist, hat sich der Einsatz verschleißfester Buchsen 16 bewährt.The Figure 1 shows a cylinder crankcase 10 with four cylinders 12 arranged in series, which are only a small distance have to each other. The cylinders 12 formed in this cylinder crankcase 10 are delimited by bushings 16 inserted into a cylinder space 14 of the cast cylinder crankcase 10. The bushes 16 are usually made of gray cast iron or steel, with bushings made of wear-resistant light metal alloys also being able to be used to reduce weight, while the cylinder crankcase 10 is cast from a light metal, in particular an aluminum alloy. Since such a light metal housing is exposed to increased wear in the area of the running surfaces of the pistons, the use of wear-resistant bushes 16 has proven itself.

Um die Buchsen 16 herum ist ein jeden einzelnen Zylinder 12 umschließender Kühlmittelkanal 18 ausgebildet, der für eine ausreichende Wärmeabfuhr im Betrieb des Verbrennungsmotors sorgt.A coolant channel 18 surrounding each individual cylinder 12 is formed around the bushes 16 and ensures sufficient heat dissipation during operation of the internal combustion engine.

Die im Wesentlichen hohlzylindrisch ausgebildeten Buchsen 16 liegen mit einem Kragen 20 auf einer am Zylinderkurbelgehäuse 10 ausgebildeten axialen Auflagefläche 22 auf, so dass das zu einer offenen Seite 24 des Zylinders 12 gewandte Ende der Buchsen im wesentlichen eine gleiche Höhe mit einer Oberfläche 26 des Zylinderkurbelgehäuses 10 aufweist. So kann unter Zwischenlage einer Zylinderkopfdichtung ein Zylinderkopf am Zylinderkurbelgehäuse 10 in dichter Weise befestigt werden. Auf der Oberfläche 26 sind hierzu Bohrungen 27 ausgebildet, die beidseitig neben den Buchsen 16 in Höhe eines Stegbereiches 17 ausgebildet sind und sich parallel zu den Buchsen nach unten erstrecken. In diese Bohrungen 27 werden beim Zusammenbau des Zylinderkopf am Zylinderkurbelgehäuse 10 Führungsstifte oder Führungsbuchsen eingesetzt, deren entgegengesetztes Ende zur Erhöhung der Stabilität des Zylinderkurbelgehäuses im Zylinderkopf angeordnet sind.The essentially hollow-cylindrical bushes 16 rest with a collar 20 on an axial bearing surface 22 formed on the cylinder crankcase 10, so that the end of the bushes facing an open side 24 of the cylinder 12 is essentially the same height as a surface 26 of the cylinder crankcase 10 having. Thus, with a cylinder head gasket in between, a cylinder head can be fastened to the cylinder crankcase 10 in a sealed manner. For this purpose, bores 27 are formed on the surface 26, which are formed on both sides next to the sockets 16 at the level of a web area 17 and extend downwards parallel to the sockets. When assembling the cylinder head on the cylinder crankcase 10, guide pins or guide bushings are inserted into these bores 27, the opposite ends of which are arranged in the cylinder head to increase the stability of the cylinder crankcase.

In Figur 2 ist ein Ausschnitt des Zylinderkurbelgehäuses 10 im Bereich eines Zylinders 12 in einer Gießform 28 dargestellt. Die Gießform 28 besteht aus einem festen Formteil 30 sowie einem beweglichen Formteil 32, welches zum Schließen der Gießform 28 in Richtung des festen Formteils 30 bewegt wird. Nach dem Schließen der Gießform 28 wird in die Gießform eine Stahlpinole 34 eingeführt, welche dazu dient den Zylinderraum 14 zu bilden. Nach dem Einfüllen einer Leichtmetallschmelze in die Gießform 28, erstarrt diese und bildet die Grundform des späteren Zylinderkurbelgehäuses 10. Die Stahlpinole 34 wird wieder aus der Form ausgefahren und die Gießform 28 anschließend geöffnet. Daraufhin wird das gegossene Zylinderkurbelgehäuse 10 aus der Gießform 28 entnommen.In Figure 2 a section of the cylinder crankcase 10 in the region of a cylinder 12 in a casting mold 28 is shown. The mold 28 consists of a fixed mold part 30 and a movable mold part 32, which is moved in the direction of the fixed mold part 30 to close the casting mold 28. After the casting mold 28 has been closed, a steel quill 34 is inserted into the casting mold, which serves to form the cylinder space 14. After a light metal melt has been poured into the casting mold 28, it solidifies and forms the basic shape of the later cylinder crankcase 10. The steel quill 34 is moved out of the mold again and the casting mold 28 is then opened. The cast cylinder crankcase 10 is then removed from the casting mold 28.

Im Folgenden wird ein Werkzeug, wie beispielsweise eine Fräse oder ein Drehwerkzeug in jeden Zylinderraum 14 eingeführt. Mit diesem Werkzeug werden die Zylinderräume 14 begrenzende Seitenwänden 36 mechanisch bearbeitet, welche durch die Stahlpinole 34 nach dem Gießen zunächst eine glatte zylindrische Oberfläche aufweisen.In the following, a tool, such as a milling cutter or a turning tool, is introduced into each cylinder space 14. With this tool, the side walls 36 delimiting the cylinder spaces 14 are machined, which, due to the steel quill 34, initially have a smooth cylindrical surface after casting.

Erfindungsgemäß wird das Werkzeug dazu genutzt, einen ersten axialen Abschnitt 38 des Zylinderraums 14 mit einem größeren Durchmesser zu versehen, der axial durch einen zur offenen Seite 24 des Zylinderraums 14 gewandten zweiten Abschnitt 40 kleineren Durchmessers und einen zu einem Kurbelwellenraum 42 gewandten dritten Abschnitt 44 kleineren Durchmessers begrenzt wird, die somit einen zu der Stahlpinole 34 korrespondierenden Durchmesser aufweisen.According to the invention, the tool is used to provide a first axial section 38 of the cylinder space 14 with a larger diameter, which is axially smaller by a second section 40 of smaller diameter facing the open side 24 of the cylinder space 14 and a third section 44 facing a crankshaft space 42 Diameter is limited, which thus have a diameter corresponding to the steel quill 34.

Des Weiteren wird mittels dieser Werkzeuge im an die offene Seite 24 angrenzenden Bereich ein vierter axialer Abschnitt 46 größeren Durchmessers erzeugt, der somit durch den zweiten Abschnitt 40 kleineren Durchmessers begrenzt wird. Somit wird eine Erweiterung an der Öffnung des Zylinderraums 14 erzeugt.Furthermore, by means of these tools, in the area adjoining the open side 24, a fourth axial section 46 of larger diameter is produced, which is thus delimited by the second section 40 of smaller diameter. An enlargement is thus produced at the opening of the cylinder space 14.

Zusätzlich kann die hierdurch entstehende axiale Auflagefläche 22 am zweiten axialen Abschnitt 40 kleineren Durchmessers mechanisch, beispielsweise durch Drehen, Fräsen oder Schleifen bearbeitet werden, so dass eine glatte und plane Auflagefläche 22 entsteht.In addition, the resulting axial bearing surface 22 on the second axial section 40 of smaller diameter can be mechanically, be processed, for example, by turning, milling or grinding, so that a smooth and flat support surface 22 is created.

In Figur 3 ist zu erkennen, dass in den so geformten Zylinderraum 14 die Buchse 16 von der offenen Seite 24 eingesetzt wird, welche als nasse hängende Buchse 16 ausgeführt ist. Dies bedeutet, dass diese Buchse mit dem Kühlmittel in Kontakt steht, also direkt umströmt wird und über ihren an der offenen Seite 24 angeordneten Kragen 20 im Zylinderraum 14 axial gehalten wird. Die Buchse 16 liegt mit ihrem Kragen 20 auf der Auflagefläche 22 auf, wobei der Außendurchmesser des Kragens 20 etwas kleiner gewählt wird als der Durchmesser des vierten Abschnitts 46 mit größerem Durchmesser des Zylinderraums 14. Im Übrigen weist die Buchse 16 eine im Wesentlichen gerade hohlzylindrische Form auf, die lediglich durch den sich radial nach außen erstreckenden Kragen 20 an ihrem zur offenen Seite 24 gewandten Ende sowie zwei an einer Außenwand 48 in einem Dichtabschnitt 50 der Buchse 16 ausgebildeten Nuten 52 unterbrochen wird, wobei der Dichtabschnitt 50 am entgegengesetzten Ende der Buchse 16 ausgebildet ist. In diesen Nuten 52 ist jeweils ein Dichtring 54 angeordnet, wobei beide Dichtringe 54 im zusammengebauten Zustand gegen die Seitenwand 36 des Zylinderraums 14 im dritten axialen Abschnitt 44 kleineren Durchmessers anliegen. Zur Zentrierung der Buchsen 16 dient zusätzlich ein Zentrierblech 56, welches radial zwischen dem zweiten axialen Abschnitt 40 kleineren Durchmessers und einem an den Kragen 20 angrenzenden Bereich der Buchse 16 angeordnet ist. Aus Gründen der Gewichtsersparnis oder Verringerung des Bearbeitungsaufwandes am Zylinderkurbelgehäuse, kann die Buchse 16 aber auch im Bereich der Kühlmittelführung einen geringeren Durchmesser aufweisen.In Figure 3 it can be seen that the sleeve 16, which is designed as a wet hanging sleeve 16, is inserted from the open side 24 into the cylinder space 14 shaped in this way. This means that this bushing is in contact with the coolant, that is to say it flows around directly and is held axially in the cylinder space 14 via its collar 20 arranged on the open side 24. The sleeve 16 rests with its collar 20 on the support surface 22, the outer diameter of the collar 20 being selected to be somewhat smaller than the diameter of the fourth section 46 with a larger diameter of the cylinder space 14. The sleeve 16 also has an essentially straight hollow cylindrical shape which is interrupted only by the radially outwardly extending collar 20 at its end facing the open side 24 and two grooves 52 formed on an outer wall 48 in a sealing section 50 of the socket 16, the sealing section 50 at the opposite end of the socket 16 is trained. A sealing ring 54 is arranged in each of these grooves 52, with both sealing rings 54 in the assembled state resting against the side wall 36 of the cylinder space 14 in the third axial section 44 of smaller diameter. A centering plate 56, which is arranged radially between the second axial section 40 of smaller diameter and an area of the bush 16 adjoining the collar 20, also serves to center the bushes 16. In order to save weight or reduce the amount of machining required on the cylinder crankcase, the bushing 16 can also have a smaller diameter in the area of the coolant guide.

Es ist aus Figur 3 deutlich zu erkennen, dass der durch das mechanisch bearbeitende Werkzeug radial erweiterte erste Abschnitt 38 größeren Durchmessers nach radial innen durch die Außenwand 48 der Buchse 16 geschlossen wird. Dieser Raum dient im Betrieb des Verbrennungsmotors als Kühlmittelkanal 18. Dessen Abdichtung erfolgt im vorliegenden Ausführungsbeispiel in Richtung des Kurbelwellenraums 42 durch die Dichtringe 54 und in Richtung der offenen Seite 24 durch die Zylinderkopfdichtung.It's over Figure 3 It can be clearly seen that the first section 38 of larger diameter, expanded radially by the mechanical processing tool, is closed radially inward by the outer wall 48 of the bushing 16. This space is used when the internal combustion engine is in operation as coolant channel 18. In the present exemplary embodiment, it is sealed in the direction of the crankshaft space 42 by the sealing rings 54 and in the direction of the open side 24 by the cylinder head gasket.

Es wäre ebenso denkbar, statt der Spielpassung zwischen dem Dichtungsabschnitt 50 der Buchse 16 und der Verwendung der Dichtringe 54 diesen Bereich mit einer Presspassung im dritten axialen Abschnitt 44 kleineren Durchmessers anzuordnen. Hierzu sollte jedoch auch dieser dritte Abschnitt 44 bei der mechanischen Bearbeitung mit einbezogen werden, um einen dichten Presssitz umlaufend sicherzustellen. Gegebenenfalls kann der dritte axiale Abschnitt 44 auch zur Verbesserung der Dichtigkeit bei der Verwendung von Dichtringen 54 bearbeitet werden. Auch kann eine axial wirkende Dichtung im Bereich der Auflagefläche 22 oder im Bereich des zweiten axialen Abschnitts 40 kleineren Durchmessers vorgesehen werden.It would also be conceivable, instead of the clearance fit between the sealing section 50 of the bushing 16 and the use of the sealing rings 54, to arrange this area with a press fit in the third axial section 44 of smaller diameter. For this purpose, however, this third section 44 should also be included in the mechanical processing in order to ensure a tight press fit all around. If necessary, the third axial section 44 can also be machined to improve the tightness when using sealing rings 54. An axially acting seal can also be provided in the area of the bearing surface 22 or in the area of the second axial section 40 of smaller diameter.

Es wird noch darauf hingewiesen, dass die Buchsen 16 im vorliegenden Ausführungsbeispiel nicht umlaufend aufliegen, sondern an zwei entgegengesetzten Seiten abgeflacht ausgebildet sind. Zwei benachbart zueinander angeordnete Buchsen 16 liegen im Stegbereich 17 mit diesen Seiten gegeneinander an und besitzen in diesem Umfangsbereich keine Auflagefläche. Dies bedeutet, dass der Kühlmittelkanal 18 in diesem Bereich nicht einseitig durch eine Seitenwand 36 des Zylinderraums 14 und eine Außenwand 48 der Buchse 16 begrenzt wird, sondern durch zwei gegenüberliegende Außenwände 48 benachbarter Buchsen 16, wodurch ein sehr kurz bauendes Zylinderkurbelgehäuse 10 geschaffen wird.It should also be pointed out that the sockets 16 in the present exemplary embodiment do not lie circumferentially, but are designed to be flattened on two opposite sides. Two sockets 16 arranged adjacent to one another are in the web area 17 with these sides against one another and have no bearing surface in this circumferential area. This means that the coolant channel 18 in this area is not limited on one side by a side wall 36 of the cylinder chamber 14 and an outer wall 48 of the bushing 16, but by two opposite outer walls 48 of adjacent bushings 16, creating a very short cylinder crankcase 10.

So entsteht ein Zylinderkurbelgehäuse mit eng stehenden Zylindern, in dessen Stegbereichen dennoch eine Wasserführung als umlaufende Wasserführung für jeden Zylinder verwirklicht ist. Für die Herstellung sind keine Kerne zur Bildung des Kühlwassermantels notwendig. Die Kühlwirkung ist aufgrund des direkten Kontaktes zu der Buchsenwand sehr gut. Des Weiteren wird ein Verzug zwischen Buchse und dem Zylinderkurbelgehäuse weitestgehend vermieden. Die Herstellung ist aufgrund entfallender Herstellungsmaterialien kostengünstiger als bekannte Lösungen.The result is a cylinder crankcase with closely spaced cylinders, in the web areas of which a water flow is implemented as a circumferential water flow for each cylinder. No cores for the formation of the cooling water jacket are necessary for production. The The cooling effect is very good due to the direct contact with the socket wall. Furthermore, distortion between the bushing and the cylinder crankcase is largely avoided. The production is more cost-effective than known solutions due to the omission of production materials.

Es sollte deutlich sein, dass der Schutzbereich nicht auf das beschriebene Ausführungsbeispiel begrenzt ist. Insbesondere kann das erfindungsgemäße Verfahren auch für Motoren mit größeren Zylinderabständen verwendet werden oder weitere Flächen auf unterschiedliche Weise bearbeitet werden. Beispielsweise könnten in die Auflageflächen zusätzliche axiale Bohrungen zur Verbindung des Kühlmittelmantels des Zylinderkurbelgehäuses mit den Kühlkanälen des Zylinderkopfes vorgesehen werden. Weitere Modifikationen sind selbstverständlich innerhalb des Schutzbereichs des Hauptanspruchs möglich. Das erfindungsgemäße Verfahren eignet sich für unterschiedliche Zylinderkurbelgehäuse und verschiedene Gießverfahren und Gießformen gemäß dem Schutzumfang der beigefügten Ansprüche.It should be clear that the scope of protection is not limited to the exemplary embodiment described. In particular, the method according to the invention can also be used for engines with larger cylinder spacings or other surfaces can be processed in different ways. For example, additional axial bores for connecting the coolant jacket of the cylinder crankcase to the cooling channels of the cylinder head could be provided in the bearing surfaces. Further modifications are of course possible within the scope of the main claim. The method according to the invention is suitable for different cylinder crankcases and different casting methods and casting molds according to the scope of protection of the appended claims.

Claims (10)

  1. Method for producing a cylinder crankcase (10) having wet, hanging liners (16) comprising the following steps:
    closing a casting mold (28),
    inserting at least one steel sleeve (34) into the casting mold (28) to form at least one cylinder space (14),
    filling the casting mold (28) with molten metal,
    extending the at least one steel sleeve (34) after the melt has solidified,
    opening the mold (28),
    removing the cylinder crankcase (10) from the casting mold (28),
    inserting a wet hanging liner (16) into each cylinder space (14) formed by the one or more steel sleeves (34),
    wherein prior to the insertion of the liners (16), the side walls (36) delimiting the at least one cylinder space (14) are mechanically machined, wherein a first section (38) having a larger diameter is formed between a second axial section (40) having a smaller diameter and a third axial section (44) having a smaller diameter, which are formed by the steel sleeve (34), wherein the first section (38) having a larger diameter and being radially widened by the machining tool is closed radially inward by the outer wall (48) of the liner (16), wherein this space serves as a coolant duct (18) in operation of the internal combustion engine.
  2. Method for producing a cylinder crankcase (10) of claim 1, characterized in that prior to the insertion of the at least one liner (16), the side walls (36) delimiting the at least one cylinder space (14) are machined, wherein a fourth section (46) having a larger diameter is formed between the second axial section (40) and an open side (24) of the at least one cylinder space (14).
  3. Method for producing a cylinder crankcase (10) of claim 2, characterized in that an axial bearing surface (22) of the second section (40) directed to the open side (24) of the at least one cylinder space (14) is machined.
  4. Method for producing a cylinder crankcase (10) of one of the preceding claims, characterized in that the side walls (36) delimiting the at least one cylinder space (14) in the third section (44) are machined to a final dimension.
  5. Method for producing a cylinder crankcase (10) of one of the preceding claims, characterized in that the machining is effected by cutting, grinding, turning or milling.
  6. Method for producing a cylinder crankcase (10) of one of the preceding claims, characterized in that each liner (16) comprises a sealing section (50) in which at least one groove (52) is formed, into which a sealing ring (54) is placed prior to the insertion of the liner (16) into the cylinder space (14).
  7. Method for producing a cylinder crankcase (10) of one of the preceding claims, characterized in that the at least one liner (16) is inserted into the cylinder space (14) such that a collar (20) of the liner (16) rests on the machined axial bearing surface (22) and the sealing section (50) abuts on the third section (44).
  8. Method for producing a cylinder crankcase (10) of one of the preceding claims, characterized in that a centering plate (56) is inserted between the second section (40) and the opposite section of the liner (16).
  9. Method for producing a cylinder crankcase (10) of one of the preceding claims, characterized in that in a web area (17) between two cylinder chambers (14), a coolant channel (18) is delimited radially by outer walls (48) of the liners (16) and, outside the web area (17), the coolant channel (18) is delimited by the first section (38) of the cylinder spaces (14) and the outer walls (48) of the liners (16).
  10. Method for producing a cylinder crankcase (10) of one of the preceding claims, characterized in that in the cylinder crankcase (10), bores (27) for guide liners or guide pins are formed which extend in parallel from the surface (26)1 to the liners (16).
EP13193129.7A 2012-11-28 2013-11-15 Process for manufacturing a cylinder crankcase Active EP2738377B1 (en)

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AT519755B1 (en) 2017-02-14 2018-10-15 Avl List Gmbh CYLINDER HOUSING OF AN INTERNAL COMBUSTION ENGINE
AT519757B1 (en) * 2017-02-14 2018-10-15 Avl List Gmbh INTERNAL COMBUSTION ENGINE WITH A CYLINDER CRANKCASE
DE102018122322A1 (en) * 2018-09-13 2020-03-19 Man Energy Solutions Se Cylinder liner and internal combustion engine
DE102018128020A1 (en) 2018-11-09 2020-05-14 Bayerische Motoren Werke Aktiengesellschaft Mold and method for manufacturing a crankcase
CN110578612A (en) * 2019-09-18 2019-12-17 广西玉柴机器股份有限公司 cylinder body structure capable of reducing S deformation of cylinder sleeve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4926801A (en) * 1987-12-22 1990-05-22 Mack Trucks, Inc. Wet/dry cylinder liner for high output engines

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2532133A1 (en) * 1975-07-18 1977-02-03 Kloeckner Humboldt Deutz Ag Water cooled engine with wet cylinder liners - has L-section reinforcing rings between liner flanges and housing
JPS6094230A (en) * 1983-10-31 1985-05-27 Toyota Motor Corp Method of manufacturing cylinder block
DE3413971A1 (en) 1984-04-13 1985-10-17 Klöckner-Humboldt-Deutz AG, 5000 Köln Liquid-cooled internal combustion engine
JPS61255246A (en) * 1985-05-08 1986-11-12 Isuzu Motors Ltd Cylinder liner for internal-combustion engine
JP3348602B2 (en) * 1996-08-09 2002-11-20 スズキ株式会社 Cylinder block manufacturing method and die casting mold
DE102005018200A1 (en) * 2005-04-19 2006-11-02 Honsel Gmbh & Co Kg Method for casting monoblock cylinder crankcases and die casting plant for carrying out the method
WO2007109766A2 (en) 2006-03-22 2007-09-27 The Timken Company Process for producing a steel cylinder liner and steel cylinder liner
DE102006042549C5 (en) * 2006-09-11 2017-08-17 Federal-Mogul Burscheid Gmbh Wet cylinder liner with cavitation-resistant surface
DE102008019200A1 (en) * 2008-04-17 2009-10-22 Honsel Ag Method for casting and die casting of cylindrical light metal cylinder housing in a casting mold, comprises mounting a core for forming cylinder hollow area by internal cooled barrel in wall of the mold before filling the light metal melt
DE202010017577U1 (en) * 2010-12-22 2012-06-04 Neue Halberg-Guss Gmbh Casting with at least one precast channel, in particular cooling channel of a cylinder crankcase or cylinder head

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4926801A (en) * 1987-12-22 1990-05-22 Mack Trucks, Inc. Wet/dry cylinder liner for high output engines

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