WO2018148769A1 - Method for producing a cast, liquid-cooled cylinder crankcase - Google Patents

Method for producing a cast, liquid-cooled cylinder crankcase Download PDF

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Publication number
WO2018148769A1
WO2018148769A1 PCT/AT2018/060036 AT2018060036W WO2018148769A1 WO 2018148769 A1 WO2018148769 A1 WO 2018148769A1 AT 2018060036 W AT2018060036 W AT 2018060036W WO 2018148769 A1 WO2018148769 A1 WO 2018148769A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
crankcase
core
crank
crank chamber
Prior art date
Application number
PCT/AT2018/060036
Other languages
German (de)
French (fr)
Inventor
Stefan Feichtinger
Stefan STOCKER-REICHER
Günter Häusl
Original Assignee
Avl List 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.)
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Publication date
Application filed by Avl List Gmbh filed Critical Avl List Gmbh
Publication of WO2018148769A1 publication Critical patent/WO2018148769A1/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
    • 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
    • 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
    • B22C9/103—Multipart cores
    • 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
    • B22C9/108—Installation of cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122—Cylinder block
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/06—Casting

Definitions

  • the invention relates to a method for producing a cast, liquid-cooled cylinder crankcase of a reciprocating internal combustion engine with at least two acting on crankshafts a crankshaft piston, with cylinder chambers for receiving the piston and a crank chamber, are arranged in the cylinder between the main bearing brackets for the main bearing of a crankshaft wherein the cylinder crankcase is cast using a plurality of crankcase core segments, wherein the crankcase core segments are aligned and interconnected prior to the casting operation.
  • the invention relates to a core assembly for carrying out the method for producing a cast, liquid-cooled cylinder crankcase of a reciprocating internal combustion engine having at least two acting on crankshafts a crankshaft piston, with a plurality of crankcase core segments formed crankcase cores.
  • the pistons act on different crankshaft crankshafts.
  • the invention relates to a reciprocating internal combustion engine, which is manufactured with this core arrangement.
  • DE 195 18 417 AI a cast, liquid-cooled cylinder crankcase of a reciprocating internal combustion engine is known, which has at least two cylinder tubes and crankcases and cylinder chambers in which between the cylinder tubes main bearing bridges for the main bearings of a crankshaft and next to the cylinder tubes bearing bores are arranged for a camshaft ,
  • DE 195 18 417 A1 proposes a one-piece crankcase core for all crankcases and cylinder chambers.
  • the disadvantage is that different core shapes are necessary for different number of cylinders, since each crankcase core is designed for a specific number of cylinders.
  • inner and outer surfaces of the cylinder crankcase are formed by different cores, which increases the number of cores needed and thus the production cost. It is the object of the present invention to avoid these disadvantages and to enable a simple, yet flexible production of a cast cylinder crankcase.
  • this object is achieved in that at least one lateral inner wall region and at least one lateral outer wall region of the cylinder crankcase is formed by a single crank chamber core segment.
  • the inner wall surfaces and the outer wall surfaces of the cylinder crankcase in the region of the crank chamber and the cylinder space are formed by a single crank chamber core segment. This can limit the number of cores.
  • crankcase core segment is provided, which is a crankcase associated crankcase segment of the crankcase including main bearing walls and at least one of the crankcase associated cylinder space at least partially, preferably in half, forms.
  • the individual crankcase core segments are lined up according to the cylinder, Hauptlagerwand- or Kröpfungskohl of the cylinder crankcase to be produced in the direction of the crankshaft axis in a modular manner one behind the other, aligned and interconnected.
  • Each individual crankcase core segment is designed to form and shape the crankcase, the half cylinder space, the main bearing walls, oil passages and coolant passages in the region of a crank throw, in particular between two adjacent main bearing walls.
  • a further reduction of the number of cores with high flexibility can be achieved if at least one crankcase-associated outer wall ceiling region of the cylinder crankcase is formed by means of the crankcase core segment.
  • At least one cooling jacket surrounding a cylinder chamber is formed by means of a cooling core segment, wherein preferably each cylinder chamber is assigned a cooling core segment.
  • the crankcase core segments and cooling core segments are aligned and interconnected prior to the casting operation.
  • FIG. 1 shows a core arrangement according to the invention in an oblique view.
  • FIG. 2 is a front view of a crankcase core segment
  • crankcase core segment 3 shows a detail of a crankcase core segment in an oblique view
  • FIG. 4 shows a cooling core segment in an oblique view.
  • the figures show a core assembly 1 for a cylinder crankcase of a reciprocating internal combustion engine with V-shaped arranged in two rows of cylinders for receiving a respective - not shown piston.
  • the core assembly 1 has a plurality of crankshaft core segments 2, which before the casting process in the direction of - not further shown - crankshaft axis of the piston engine to be cast lined up, aligned and firmly connected.
  • Each crankshaft core segment 2 is associated with a - not further apparent - crank throw of the crankshaft of the reciprocating internal combustion engine or a main bearing wall 5.
  • each piston of the internal combustion engine acts on each crank throw of the crankshaft.
  • the pistons thus act on different crankshafts of the crankshaft.
  • each crank chamber core segment 2 is associated with a crankshaft arranged centrally in the axial direction in the crankcase core segment 2 and two main bearing walls 5 arranged at the axial ends and bounded by the cylinder axes 4 a of the cylinder chambers 4 engine transverse planes 3 a, 3 b in which the main bearing walls 5 are located.
  • Each crankshaft core segment 2 is designed to form the crankcase segments 6 of the crank chamber 7 associated with the main bearing wall 5, as well as at least one cylinder chamber 4 of each cylinder bank together with the main bearing walls 5 arranged in the crankcase segment 6, and possibly also cam bearing walls, as can be seen from FIG.
  • each crankcase core segment 2 is designed so that it forms the lateral inner wall portions 8 and lateral outer wall portions 9 of the corresponding crankcase segment 6 of the cylinder crankcase.
  • at least one cooling jacket 13 surrounding a cylinder chamber 4 is formed by means of a cooling core segment 14, wherein each cylinder chamber 4 is assigned at least one cooling core segment 14.
  • crankshaft core segments 2 Prior to the casting process, a number of crankshaft core segments 2 corresponding to the number of crank chamber core segments 2 to be cast is successively aligned in the direction of the crankshaft axis, aligned and connected to form a crank chamber core unit 15. Similarly, one of the cylinder space number of the reciprocating internal combustion engine to be cast corresponding number of cooling core segments 14 is placed on the crank space core segments 2, aligned and connected thereto to a cylinder crankcase core unit 16. This can then be subjected to the casting process in a known manner.
  • Crank space 7, camshaft space, cooling jackets 13 and outer shape of the cylinder crankcase are formed by a core assembly 1 with repeating core modules, which are formed by the crank space core segments 2, the cooling core segments 14.
  • the core modules can be used to produce cylinder blocks with different numbers of cylinders.

Abstract

The invention relates to a method for producing a cast, liquid-cooled cylinder crankcase of a reciprocating internal combustion engine comprising at least two pistons acting on crank throws of a crankshaft, having cylinder chambers (4) for receiving the pistons, and a crank chamber (7), in which main bearing walls (5) for the main bearings of a crankshaft are arranged between the cylinder chambers (4), wherein the cylinder crankcase is cast using a plurality of crank chamber core segments (2), wherein the crank chamber core segments (2) are aligned and connected to one another before the casting process. In order to enable simple, but nevertheless flexible manufacture of a cast cylinder crankcase, according to the invention at least one lateral inner wall region (8) and at least one lateral outer wall region (9) of the cylinder crankcase is formed by one single crank chamber core segment (2).

Description

Verfahren zur Herstellung eines gegossenen, flüssigkeitsgekühlten Zylinderkurbelgehäuses  Method for producing a cast, liquid-cooled cylinder crankcase
Die Erfindung betrifft ein Verfahren zur Herstellung eines gegossenen, flüssigkeitsgekühlten Zylinderkurbelgehäuses einer Hubkolben-Brennkraftmaschine mit mindestens zwei auf Kurbelkröpfungen einer Kurbelwelle einwirkende Kolben, mit Zylinderräumen zur Aufnahme der Kolben und mit einem Kurbelraum, in dem zwischen den Zylindern Hauptlagerbrücken für die Hauptlager einer Kurbelwelle angeordnet sind, wobei das Zylinderkurbelgehäuse unter Verwendung von mehreren Kurbelraumkernsegmenten gegossen wird, wobei die Kurbelraumkernsegmente vor dem Gießvorgang ausgerichtet und miteinander verbunden werden. Weiters betrifft die Erfindung eine Kernanordnung zur Durchführung des Verfahrens zur Herstellung eines gegossenen, flüssigkeitsgekühlten Zylinderkurbelgehäuses einer Hubkolben-Brennkraftmaschine mit mindestens zwei auf Kurbelkröpfungen einer Kurbelwelle einwirkende Kolben, mit mehreren als Kurbelraumkernsegmente ausgebildete Kurbelraumkerne. Die Kolben wirken auf unterschiedliche Kurbelkröpfungen der Kurbelwelle. Ferner betrifft die Erfindung eine Hubkolben-Brennkraftmaschine, welche mit dieser Kernanordnung hergestellt ist. The invention relates to a method for producing a cast, liquid-cooled cylinder crankcase of a reciprocating internal combustion engine with at least two acting on crankshafts a crankshaft piston, with cylinder chambers for receiving the piston and a crank chamber, are arranged in the cylinder between the main bearing brackets for the main bearing of a crankshaft wherein the cylinder crankcase is cast using a plurality of crankcase core segments, wherein the crankcase core segments are aligned and interconnected prior to the casting operation. Furthermore, the invention relates to a core assembly for carrying out the method for producing a cast, liquid-cooled cylinder crankcase of a reciprocating internal combustion engine having at least two acting on crankshafts a crankshaft piston, with a plurality of crankcase core segments formed crankcase cores. The pistons act on different crankshaft crankshafts. Furthermore, the invention relates to a reciprocating internal combustion engine, which is manufactured with this core arrangement.
Bei gegossenen Zylinderkurbelgehäusen ist es üblich, dass deren Innenräume beim Gießen durch eine Vielzahl an Gusskernen gebildet werden. Die Anzahl der Gusskerne ist ein maßgeblicher Faktor für den Bauaufwand eines Gussrohlings. Bei der Herstellung von herkömmlichen Hubkolben-Brennkraftmaschinen ist üblicherweise eine Vielzahl von Gusskernen erforderlich, was sich nachteilig auf die Fertigungskosten und die Fertigungsqualität auswirkt. In cast cylinder crankcases, it is common for their interiors to be formed by a plurality of casting cores during casting. The number of cores is a significant factor in the construction cost of a cast blank. In the production of conventional reciprocating internal combustion engines usually a variety of cores is required, which adversely affects the manufacturing cost and manufacturing quality.
Aus der DE 195 18 417 AI ist ein gegossenes, flüssigkeitsgekühltes Zylinderkurbelgehäuse einer Hubkolben-Brennkraftmaschine bekannt, welches mindestens zwei Zylinderrohre und Kurbelräume sowie Zylinderräume aufweist, in denen zwischen den Zylinderrohren Hauptlagerbrücken für die Hauptlager einer Kurbelwelle und neben den Zylinderrohren Lagerbohrungen für eine Nockenwelle angeordnet sind. Zur Senkung der Herstellungskosten und zur Steigerung der Fertigungsqualität wird in der DE 195 18 417 AI ein einteiliger Kurbelraumkern für sämtliche Kurbelräume und Zylinderräume vorgeschlagen. Nachteilig ist, dass für unterschiedliche Zylinderzahl verschiedene Kernformen nötig sind, da jeder Kurbelraumkern für eine bestimmte Zylinderzahl ausgebildet ist. Weiters werden Innen- und Außenflächen des Zylinderkurbelgehäuses durch unterschiedliche Kerne gebildet, was die Anzahl der nötigen Kerne und somit den Herstellungsaufwand erhöht. Es ist die Aufgabe der vorliegenden Erfindung, diese Nachteile zu vermeiden und eine einfache, aber dennoch flexible Fertigung eines gegossenen Zylinderkurbelgehäuses zu ermöglichen. From DE 195 18 417 AI a cast, liquid-cooled cylinder crankcase of a reciprocating internal combustion engine is known, which has at least two cylinder tubes and crankcases and cylinder chambers in which between the cylinder tubes main bearing bridges for the main bearings of a crankshaft and next to the cylinder tubes bearing bores are arranged for a camshaft , In order to reduce the production costs and to increase the manufacturing quality, DE 195 18 417 A1 proposes a one-piece crankcase core for all crankcases and cylinder chambers. The disadvantage is that different core shapes are necessary for different number of cylinders, since each crankcase core is designed for a specific number of cylinders. Furthermore, inner and outer surfaces of the cylinder crankcase are formed by different cores, which increases the number of cores needed and thus the production cost. It is the object of the present invention to avoid these disadvantages and to enable a simple, yet flexible production of a cast cylinder crankcase.
Erfindungsgemäß erfolgt wird diese Aufgabe dadurch gelöst, dass zumindest ein seitlicher Innenwandbereich und zumindest ein seitlicher Außenwandbereich des Zylinderkurbelgehäuses durch ein einziges Kurbelraumkernsegment geformt wird. According to the invention, this object is achieved in that at least one lateral inner wall region and at least one lateral outer wall region of the cylinder crankcase is formed by a single crank chamber core segment.
Somit werden die Innenwandflächen und die Außenwandflächen des Zylinderkurbelgehäuses im Bereich des Kurbelraumes und des Zylinderraumes durch ein einziges Kurbelraumkernsegment geformt. Dadurch kann die Zahl der Kerne eingeschränkt werden. Thus, the inner wall surfaces and the outer wall surfaces of the cylinder crankcase in the region of the crank chamber and the cylinder space are formed by a single crank chamber core segment. This can limit the number of cores.
Um eine hohe Variabilität beim Einsatz der Kerne für unterschiedliche Zylinderzahlen zu ermöglichen, ist es besonders vorteilhaft, wenn pro Kurbelkröpfung oder pro Hauptlagerwand ein einziges Kurbelraumkernsegment vorgesehen wird, welches ein der Kurbelkröpfung zugeordnetes Kurbelraumsegment des Kurbelraumes samt darin enthaltenen Hauptlagerwänden und zumindest einen der Kurbelkröpfung zugeordneten Zylinderraum -zumindest teilweise -, vorzugsweise zur Hälfte, formt. In order to enable a high variability in the use of cores for different numbers of cylinders, it is particularly advantageous if per crankshaft or per main bearing wall a single crankcase core segment is provided, which is a crankcase associated crankcase segment of the crankcase including main bearing walls and at least one of the crankcase associated cylinder space at least partially, preferably in half, forms.
Die einzelnen Kurbelraumkernsegmente werden entsprechend der Zylinder-, Hauptlagerwand- bzw. Kröpfungszahl des herzustellenden Zylinderkurbelgehäuses in Richtung der Kurbelwellenachse modulartig hintereinander aneinandergereiht, ausgerichtet und miteinander verbunden. Jedes einzelne Kurbelraumkernsegment ist so gestaltet, dass es den Kurbelraum, den halben Zylinderraum, die Hauptlagerwände, Ölkanäle und Kühlmittelkanäle im Bereich einer Kurbelkröpfung, insbesondere zwischen zwei benachbarten Hauptlagerwänden, ausbildet und formt. The individual crankcase core segments are lined up according to the cylinder, Hauptlagerwand- or Kröpfungszahl of the cylinder crankcase to be produced in the direction of the crankshaft axis in a modular manner one behind the other, aligned and interconnected. Each individual crankcase core segment is designed to form and shape the crankcase, the half cylinder space, the main bearing walls, oil passages and coolant passages in the region of a crank throw, in particular between two adjacent main bearing walls.
Eine weitere Verringerung der Kernanzahl bei hoher Flexibilität lässt sich erzielen, wenn zumindest ein einer Kurbelkröpfung zugeordneter Außenwanddeckenbereich des Zylinderkurbelgehäuses mittels des Kurbelraumkernsegments geformt wird. A further reduction of the number of cores with high flexibility can be achieved if at least one crankcase-associated outer wall ceiling region of the cylinder crankcase is formed by means of the crankcase core segment.
In einer eine einfache Fertigung ermöglichende Ausführungsvariante der Erfindung ist vorgesehen, dass zumindest ein einem Zylinderraum umgebender Kühlmantel mittels eines Kühlkernsegmentes geformt wird, wobei vorzugsweise jedem Zylinderraum ein Kühlkernsegment zugeordnet wird. Die Kurbelraumkernsegmente und Kühlkernsegmente werden vor dem Gießvorgang ausgerichtet und miteinander verbunden. Die Erfindung wird im Folgenden anhand eines in den Figuren dargestellten nicht einschränkenden Ausführungsbeispiels näher erläutert. Darin zeigen : In a simple production-enabling embodiment variant of the invention, it is provided that at least one cooling jacket surrounding a cylinder chamber is formed by means of a cooling core segment, wherein preferably each cylinder chamber is assigned a cooling core segment. The crankcase core segments and cooling core segments are aligned and interconnected prior to the casting operation. The invention is explained in more detail below with reference to a non-limiting embodiment shown in the figures. Show:
Fig. 1 eine erfindungsgemäße Kernanordnung in einer Schrägansicht; 1 shows a core arrangement according to the invention in an oblique view.
Fig. 2 ein Kurbelraumkernsegment in einer Vorderansicht; FIG. 2 is a front view of a crankcase core segment; FIG.
Fig. 3 ein Detail eines Kurbelraumkernsegmentes in einer Schrägansicht; 3 shows a detail of a crankcase core segment in an oblique view;
und  and
Fig. 4 ein Kühlkernsegment in einer Schrägansicht. 4 shows a cooling core segment in an oblique view.
Die Figuren zeigen eine Kernanordnung 1 für ein Zylinderkurbelgehäuse einer Hubkolben-Brennkraftmaschine mit V-förmig in zwei Reihen angeordneten Zylindern zur Aufnahme jeweils eines - nicht weiter dargestellten Kolbens. Die Kernanordnung 1 weist mehrere Kurbelraumkernsegmente 2 auf, welche vor dem Gießvorgang in Richtung der - nicht weiter dargestellten - Kurbelwellenachse der zu gießenden Hubkolben-Brennkraftmaschine hintereinander gereiht, ausgerichtet und fest verbunden werden. Jedes Kurbelraumkernsegment 2 ist einer - nicht weiter ersichtlichen - Kurbelkröpfung der Kurbelwelle der Hubkolben-Brennkraftmaschine oder einer Hauptlagerwand 5 zugeordnet. Auf jede Kurbelkröpfung der Kurbelwelle wirkt beispielsweise jeweils ein Kolben der Brennkraftmaschine ein. Die Kolben wirken also auf unterschiedliche Kurbelkröpfungen der Kurbelwelle. Im vorliegenden Ausführungsbeispiel ist jedes Kurbelraumkernsegment 2 einer in axialer Richtung mittig im Kurbelraumkernsegment 2 angeordneten Kurbelkröpfung und zwei an den axialen Enden angeordneten Hauptlagerwänden 5 zugeordnet und durch die Zylinderachsen 4a der Zylinderräume 4 beinhaltende Motorquerebenen 3a, 3b in denen sich die Hauptlagerwände 5 befinden, begrenzt. Jedes Kurbelraumkernsegment 2 ist gestaltet, um die der Hauptlagerwand 5 zugeordneten Kurbelraumsegmente 6 des Kurbelraumes 7, sowie zumindest einen Zylinderraum 4 jeder Zylinderreihe samt den im Kurbelraumsegment 6 angeordneten Hauptlagerwänden 5, und gegebenenfalls auch Nockenlagerwände, zu formen, wie aus Fig. 3 ersichtlich ist. The figures show a core assembly 1 for a cylinder crankcase of a reciprocating internal combustion engine with V-shaped arranged in two rows of cylinders for receiving a respective - not shown piston. The core assembly 1 has a plurality of crankshaft core segments 2, which before the casting process in the direction of - not further shown - crankshaft axis of the piston engine to be cast lined up, aligned and firmly connected. Each crankshaft core segment 2 is associated with a - not further apparent - crank throw of the crankshaft of the reciprocating internal combustion engine or a main bearing wall 5. For example, each piston of the internal combustion engine acts on each crank throw of the crankshaft. The pistons thus act on different crankshafts of the crankshaft. In the present exemplary embodiment, each crank chamber core segment 2 is associated with a crankshaft arranged centrally in the axial direction in the crankcase core segment 2 and two main bearing walls 5 arranged at the axial ends and bounded by the cylinder axes 4 a of the cylinder chambers 4 engine transverse planes 3 a, 3 b in which the main bearing walls 5 are located. Each crankshaft core segment 2 is designed to form the crankcase segments 6 of the crank chamber 7 associated with the main bearing wall 5, as well as at least one cylinder chamber 4 of each cylinder bank together with the main bearing walls 5 arranged in the crankcase segment 6, and possibly also cam bearing walls, as can be seen from FIG.
Weiters ist jedes Kurbelraumkernsegment 2 so gestaltet, dass es die seitlichen Innenwandbereiche 8 und seitlichen Außenwandbereiche 9 des entsprechenden Kurbelraumsegmentes 6 des Zylinderkurbelgehäuses formt. Im Detail werden die Innenwandflächen 10 und die Außenwandflächen 11 an beiden Längsseiten des Zylinderkurbelgehäuses im Bereich des Kurbelraumes 7 und des Zylinderraumes 4, sowie der einer Kurbelkröpfung zugeordnete Außenwanddeckenbereich 12 des Zylinderkurbelgehäuses durch jeweils ein einziges Kurbelraumkernsegment 2 geformt. Wie aus Fig. 1 und 4 ersichtlich ist, wird zumindest ein einem Zylinderraum 4 umgebender Kühlmantel 13 mittels eines Kühlkernsegmentes 14 geformt, wobei jedem Zylinderraum 4 zumindest ein Kühlkernsegment 14 zugeordnet wird. Furthermore, each crankcase core segment 2 is designed so that it forms the lateral inner wall portions 8 and lateral outer wall portions 9 of the corresponding crankcase segment 6 of the cylinder crankcase. In detail, the inner wall surfaces 10 and the outer wall surfaces 11 on both longitudinal sides of the cylinder crankcase in the region of the crank chamber 7 and the cylinder chamber 4, as well as a crank throw associated outer wall ceiling region 12 of the cylinder crankcase formed by a single crankcase core segment 2. As can be seen from FIGS. 1 and 4, at least one cooling jacket 13 surrounding a cylinder chamber 4 is formed by means of a cooling core segment 14, wherein each cylinder chamber 4 is assigned at least one cooling core segment 14.
Vor dem Gussvorgang wird eine der Kröpfungszahl der zu gießenden Hubkolben- Brennkraftmaschine entsprechende Anzahl an Kurbelraumkernsegmenten 2 in Richtung der Kurbelwellenachse hintereinander angereiht, ausgerichtet und zu einer Kurbelraumkerneinheit 15 miteinander verbunden. Genauso wird eine der Zylinderraumzahl der zu gießenden Hubkolben-Brennkraftmaschine entsprechende Anzahl an Kühlkernsegmenten 14 auf die Kurbelraumkernsegmente 2 aufgesetzt, ausgerichtet und mit dieser zu einer Zylinderkurbelgehäusekerneinheit 16 verbunden. Diese kann dann dem Gussvorgang in bekannter Weise unterzogen werden. Prior to the casting process, a number of crankshaft core segments 2 corresponding to the number of crank chamber core segments 2 to be cast is successively aligned in the direction of the crankshaft axis, aligned and connected to form a crank chamber core unit 15. Similarly, one of the cylinder space number of the reciprocating internal combustion engine to be cast corresponding number of cooling core segments 14 is placed on the crank space core segments 2, aligned and connected thereto to a cylinder crankcase core unit 16. This can then be subjected to the casting process in a known manner.
Kurbelraum 7, Nockenwellenraum, Kühlmäntel 13 und Außenform des Zylinderkurbelgehäuses werden durch eine Kernanordnung 1 mit sich wiederholenden Kernmodulen gebildet, welche durch die Kurbelraumkernsegmente 2, die Kühlkernsegmente 14 gebildet werden. Somit können die Kernmodule verwendet werden um Zylinderkurbelgehäuse mit unterschiedlicher Zylinderanzahl herzustellen. Crank space 7, camshaft space, cooling jackets 13 and outer shape of the cylinder crankcase are formed by a core assembly 1 with repeating core modules, which are formed by the crank space core segments 2, the cooling core segments 14. Thus, the core modules can be used to produce cylinder blocks with different numbers of cylinders.

Claims

P A T E N T A N S P R Ü C H E PATENT APPLICATIONS
1. Verfahren zur Herstellung eines gegossenen, flüssigkeitsgekühlten Zylinderkurbelgehäuses einer Hubkolben-Brennkraftmaschine mit mindestens zwei auf Kurbelkröpfungen einer Kurbelwelle einwirkende Kolben, mit Zylinderräumen (4) zur Aufnahme der Kolben und mit einem Kurbelraum (7), in dem zwischen den Zylinderräumen (4) Hauptlagerwände (5) für die Hauptlager einer Kurbelwelle angeordnet sind, wobei das Zylinderkurbelgehäuse unter Verwendung von mehreren Kurbelraumkernsegmenten (2) gegossen wird, wobei die Kurbelraumkernsegmente (2) vor dem Gießvorgang ausgerichtet und miteinander verbunden werden, dadurch gekennzeichnet, dass zumindest ein seitlicher Innenwandbereich (8) und zumindest ein seitlicher Außenwandbereich (9) des Zylinderkurbelgehäuses durch ein einziges Kurbelraumkernsegment (2) geformt wird. 1. A method for producing a cast, liquid-cooled cylinder crankcase of a reciprocating internal combustion engine having at least two on crankshafts a crankshaft acting piston, with cylinder chambers (4) for receiving the piston and with a crank chamber (7), in which between the cylinder chambers (4) main bearing walls (5) are arranged for the main bearings of a crankshaft, wherein the cylinder crankcase is cast using a plurality of crankshaft core segments (2), wherein the crank space core segments (2) are aligned and interconnected prior to the casting process, characterized in that at least one lateral inner wall portion (8 ) and at least one lateral outer wall region (9) of the cylinder crankcase is formed by a single crankcase core segment (2).
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Innenwandflächen (10) und die Außenwandflächen (11) des Zylinderkurbelgehäuses im Bereich des Kurbelraumes (7) und des Zylinderraumes (4) durch ein einziges Kurbelraumkernsegment (2) geformt werden. 2. The method according to claim 1, characterized in that the inner wall surfaces (10) and the outer wall surfaces (11) of the cylinder crankcase in the region of the crank chamber (7) and the cylinder chamber (4) by a single crank chamber core segment (2) are formed.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass pro Kurbelkröpfung oder pro Hauptlagerwand (5) ein einziges Kurbelraumkernsegment (2) vorgesehen wird, welches ein der Kurbelkröpfung zugeordnetes Kurbelraumsegment (6) des Kurbelraumes samt darin enthaltener Hauptlagerwand (5) und zumindest einen der Kurbelkröpfung zugeordneten Zylinderraum (4) - zumindest teilweise -, vorzugsweise zur Hälfte, formt. 3. The method according to claim 1 or 2, characterized in that per crank or per main bearing wall (5) a single crank chamber core segment (2) is provided, which is a crank throw associated crankcase segment (6) of the crankcase including therein main bearing wall (5) and at least one of the crank throw associated cylinder chamber (4) - at least partially -, preferably half formed.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zumindest ein einer Kurbelkröpfung oder Hauptlagerwand (5) zugeordneter Außenwanddeckenbereich (12) des Zylinderkurbelgehäuses mittels des Kurbelraumkernsegments (2) geformt wird. 4. The method according to any one of claims 1 to 3, characterized in that at least one of a crank throw or main bearing wall (5) associated outer wall ceiling region (12) of the cylinder crankcase by means of the crank chamber core segment (2) is formed.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zumindest ein einem Zylinderraum (4) umgebender Kühlmantel (13) mittels eines Kühlkernsegmentes (14) geformt wird, wobei vorzugsweise jedem Zylinderraum (4) ein Kühlkernsegment (14) zugeordnet wird. 5. The method according to any one of claims 1 to 4, characterized in that at least one cylinder space (4) surrounding the cooling jacket (13) by means of a cooling core segment (14) is formed, preferably each cylinder space (4) is assigned a cooling core segment (14) ,
6. Kernanordnung (1) zur Durchführung des Verfahrens zur Herstellung eines gegossenen, flüssigkeitsgekühlten Zylinderkurbelgehäuses einer Hubkolben- Brennkraftmaschine mit mindestens zwei auf Kurbelkröpfungen einer Kurbelwelle einwirkende Kolben, mit mehreren Kurbelraumkernsegmenten (2), nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass zu- mindest ein seitlicher Innenwandbereich (8) und zumindest ein seitlicher Außenwandbereich (9) des Zylinderkurbelgehäuses durch ein einziges Kurbelraumkernsegment (2) geformt ist. 6. Core assembly (1) for carrying out the method for producing a cast, liquid-cooled cylinder crankcase of a reciprocating internal combustion engine having at least two crankshafts crankshaft acting piston, with a plurality of crankshaft core segments (2), according to one of claims 1 to 5, characterized in that to- at least one lateral inner wall region (8) and at least one lateral outer wall region (9) of the cylinder crankcase are formed by a single crank chamber core segment (2).
7. Kernanordnung (1) nach Anspruch 6, dadurch gekennzeichnet, dass die Innenwandflächen (10) und die Außenwandflächen (11) des Zylinderkurbelgehäuses im Bereich des Kurbelraumes (7) und des Zylinderraumes (4) durch ein einziges Kurbelraumkernsegment (2) geformt sind. 7. core assembly (1) according to claim 6, characterized in that the inner wall surfaces (10) and the outer wall surfaces (11) of the cylinder crankcase in the region of the crank chamber (7) and the cylinder chamber (4) by a single crank chamber core segment (2) are formed.
8. Kernanordnung (1) nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass pro Kurbelkröpfung oder pro Hauptlagerwand (5) ein einziges Kurbelraumkernsegment (2) vorgesehen ist, welches ein der Kurbelkröpfung zugeordnetes Kurbelraumsegment (6) des Kurbelraumes (7) samt darin enthaltener Hauptlagerwand (5) und zumindest einen der Kurbelkröpfung zugeordneten Zylinderraum (4) - zumindest teilweise -, vorzugsweise zur Hälfte, formt. 8. core assembly (1) according to claim 6 or 7, characterized in that per crank or per main bearing wall (5) a single crank chamber core segment (2) is provided which a crank throw associated crankcase segment (6) of the crank chamber (7) including therein Main bearing wall (5) and at least one of the crank throw associated cylinder chamber (4) - at least partially -, preferably half, forms.
9. Kernanordnung (1) nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass zumindest ein einer Kurbelkröpfung zugeordneter Außenwanddeckenbereich (12) des Zylinderkurbelgehäuses mittels des Kurbelraumkernsegments (2) geformt ist. 9. Core assembly (1) according to any one of claims 6 to 8, characterized in that at least one of a Kurbelkröpfung associated outer wall ceiling region (12) of the cylinder crankcase by means of the crank chamber core segment (2) is formed.
10. Kernanordnung (1) nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass zumindest ein einem Zylinderraum (4) umgebender Kühlmantel (13) mittels eines Kühlkernsegmentes (14) geformt ist, wobei vorzugsweise jedem Zylinderraum (4) ein Kühlkernsegment (14) zugeordnet ist. 10. core arrangement (1) according to one of claims 6 to 9, characterized in that at least one cylinder space (4) surrounding the cooling jacket (13) by means of a cooling core segment (14) is formed, preferably each cylinder space (4) a cooling core segment (14 ) assigned.
11. Hubkolben-Brennkraftmaschine, welche mit der Kernanordnung (1) nach einem der Ansprüche 6 bis 10 hergestellt ist. 11. reciprocating internal combustion engine, which with the core assembly (1) according to one of claims 6 to 10 is made.
PCT/AT2018/060036 2017-02-14 2018-02-09 Method for producing a cast, liquid-cooled cylinder crankcase WO2018148769A1 (en)

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ATA50119/2017A AT519596B1 (en) 2017-02-14 2017-02-14 PROCESS FOR MANUFACTURING A CAST, LIQUID-COOLED CYLINDER CRANKCASE
ATA50119/2017 2017-02-14

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CN113941691B (en) * 2021-12-21 2022-03-04 象山同家模具制造有限公司 Automatic casting mould of loosing core

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US3302250A (en) * 1963-12-18 1967-02-07 Gen Motors Corp Core box and molding assembly for internal combustion engine blocks
GB2211122A (en) * 1987-10-22 1989-06-28 Agustin Arana Erana Joining blow core parts together,by a further blowing operation
DE4326157C1 (en) * 1993-08-04 1994-05-05 Daimler Benz Ag Mould for a V-form piston engine cylinder crankcase - with cores for water entry and oil cooler spaces joined to the cylinder space cores by means of connector cores
DE10225667A1 (en) * 2001-06-11 2002-12-19 Gen Motors Corp Casting engine blocks
WO2008059330A1 (en) * 2006-11-17 2008-05-22 Toyota Jidosha Kabushiki Kaisha Cylinder block and method for producing cylinder block
WO2014085430A2 (en) * 2012-11-27 2014-06-05 Quinton Aaron S Stabilized engine casting core assembly, method for making an engine body, and engine body formed thereby

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DE10211053A1 (en) * 2002-03-13 2003-10-09 Vaw Ver Aluminium Werke Ag Process for casting cylinder crankcases and core package for casting cylinder crankcases, core box and core package

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302250A (en) * 1963-12-18 1967-02-07 Gen Motors Corp Core box and molding assembly for internal combustion engine blocks
GB2211122A (en) * 1987-10-22 1989-06-28 Agustin Arana Erana Joining blow core parts together,by a further blowing operation
DE4326157C1 (en) * 1993-08-04 1994-05-05 Daimler Benz Ag Mould for a V-form piston engine cylinder crankcase - with cores for water entry and oil cooler spaces joined to the cylinder space cores by means of connector cores
DE10225667A1 (en) * 2001-06-11 2002-12-19 Gen Motors Corp Casting engine blocks
WO2008059330A1 (en) * 2006-11-17 2008-05-22 Toyota Jidosha Kabushiki Kaisha Cylinder block and method for producing cylinder block
WO2014085430A2 (en) * 2012-11-27 2014-06-05 Quinton Aaron S Stabilized engine casting core assembly, method for making an engine body, and engine body formed thereby

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