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EP1368562A1 - Zylinderkurbelgehäuse für eine flüssigkeitsgekühlte brennkraftmaschine - Google Patents

Zylinderkurbelgehäuse für eine flüssigkeitsgekühlte brennkraftmaschine

Info

Publication number
EP1368562A1
EP1368562A1 EP02700217A EP02700217A EP1368562A1 EP 1368562 A1 EP1368562 A1 EP 1368562A1 EP 02700217 A EP02700217 A EP 02700217A EP 02700217 A EP02700217 A EP 02700217A EP 1368562 A1 EP1368562 A1 EP 1368562A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
housing
aluminum
magnesium
engine block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02700217A
Other languages
German (de)
French (fr)
Other versions
EP1368562B1 (en
Inventor
Rudolf Flierl
Johann Wolf
Rudolf Gibisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1368562A1 publication Critical patent/EP1368562A1/en
Application granted granted Critical
Publication of EP1368562B1 publication Critical patent/EP1368562B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F02F1/108—Siamese-type cylinders, i.e. cylinders cast together
    • 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
    • F02F7/0002—Cylinder arrangements
    • F02F7/0007—Crankcases of engines with cylinders in line
    • 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
    • F02F7/0085—Materials for constructing engines or their parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1824—Number of cylinders six
    • 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
    • F02F2001/104—Cylinders; Cylinder heads  having cooling means for liquid cooling using an open deck, i.e. the water jacket is open at the block top face
    • 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
    • F02F7/0085—Materials for constructing engines or their parts
    • F02F2007/009—Hypereutectic aluminum, e.g. aluminum alloys with high SI content
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/028—Magnesium

Definitions

  • the invention relates to a cylinder crankcase for a liquid-cooled internal combustion engine.
  • the highly loaded engine block which is essentially formed from the cylinders with directly or indirectly formed crankshaft bearings, preferably from a material that can withstand higher loads, and to design the less loaded housing walls separately from a lighter, in particular thin-walled material, taking into account a material-adapted separate guide for liquid operating materials.
  • a cylinder crankcase for a liquid-cooled internal combustion engine in which an engine block with bearing seats molded onto a crankshaft side and cylinder tubes arranged in one piece above it is encased by a housing jacket, the housing jacket being connected to the deck in a sealable connection via a flange stands for the separation of the lubricating oil-carrying crank chamber from a coolant chamber assigned to the cylinder tubes.
  • a flange stands for the separation of the lubricating oil-carrying crank chamber from a coolant chamber assigned to the cylinder tubes.
  • DE 44 09 750 A1 shows and describes a prebiotic cylinder crankcase for a liquid-cooled internal combustion engine with an essentially magnesium housing with a cylinder insert comprising a plurality of cylinder tubes arranged in series.
  • the magnesium-cast cylinder insert made of an aluminum alloy in the end area on the cylinder head side has an envelope wall surrounding the interconnected cylinder tubes to form a coolant chamber, so that lubricating oil as a further liquid operating fluid is preferably guided in channels formed in the magnesium housing.
  • EP 0 751 289 B1 shows and describes a cylinder crankcase for a liquid-cooled internal combustion engine, in which an engine block made of an iron material with bearing seats arranged on the deck on the one hand and cylinder tubes provided on the other hand is used in an aluminum housing produced by casting.
  • the cylinder head not shown, is screwed into the aluminum housing, whereas the bearing caps of the crankshaft bearings are screwed to the bearing seats formed from the iron material.
  • the flow of force between the cylinder head and the crankshaft bearing cover thus runs disadvantageously over materials with different thermal expansion values. This requires, for example, a cylinder head gasket with particularly high pressure.
  • a cylinder crankcase for a liquid-cooled internal combustion engine according to DE 195 40 763 C1, in which an engine block made of an iron material with, on the one hand, deck chairs arranged on a deck and, on the other hand, cylinder tubes provided in one piece, relatively free-standing screw pipes are provided for the cylinder head screw connection.
  • This relatively heavy engine block can be from one Housing cast from an aluminum or magnesium alloy, but in the case of a magnesium housing to avoid disadvantageous contact with the cooling water, complex corrosion protection must be provided.
  • the invention is based on the object of demonstrating a structure that reliably absorbs forces and moments for a cylinder crankcase made of an aluminum and a magnesium alloy produced in composite casting and with the appropriate management of the required liquid operating materials in a material-adapted manner.
  • the advantage of the invention can be seen in the fact that on the one hand the engine block formed with an aluminum alloy with coolant spaces absorbs the flow of force between the cylinder head and the crankshaft bearing caps and on the other hand it has fillable openings and castings when a magnesium alloy is cast around the housing Channels with the aluminum engine block forms a rigid and torsion-resistant unit, which is supported by targeted detailed training of the magnesium housing.
  • FIG. 1 shows a cylinder crankcase in a perspective view
  • FIG. 2 shows an engine block according to the invention in a perspective view
  • Figure 3 shows a section through the engine block along the line III-III in
  • Figure 4 shows a section along the line IV-IV in the cylinder crankcase
  • Figure 1 shows a detail section through a modified cylinder crankcase.
  • a cylinder crankcase 1 for a liquid-cooled internal combustion engine (not shown in any more detail) comprises an engine block 2 made of an aluminum alloy with bearing seats 4 formed on the deck 3 on the crankshaft side and cylinder tubes 5 arranged in one piece above it and having coolant spaces 7 on the cylinder head side formed on them , 7 'limit.
  • screw pipes 8 serving as a cylinder head screw connection are formed, which are connected to the deck 3 by means of webs 9 arranged on the cylinder tubes 5 and connected to the bearing chairs 4 in a force-conducting connection.
  • the aluminum engine block 2 is cast into a housing 10 made of a magnesium alloy with housing wall sections 12, 12 ′ delimiting a crank chamber 11.
  • the housing wall sections 12, 12 ′ lying opposite one another are connected to one another via cross connections 13, wherein a respective bearing bracket 4 is cast into the housing wall sections 12, 12 ′ stiffening cross connections 13.
  • shrink connections are advantageously achieved which are useful for distributing forces and moments to the aluminum engine block 2 and the magnesium housing 10.
  • the magnesium housing 10 which is designed exclusively for guiding the lubricating oil with oil channels 14, 15, is stiffened, in particular torsion-stiffened, in a first end region by means of an end-side shaft 16 arranged in one piece.
  • the magnesium housing 10 encloses threaded eyes 18, which are supported on the aluminum engine block 2 by means of ribs 17 and serve for releasable connection of a clutch or transmission bell, not shown.
  • perforations and fillable channels which are interspersed with the magnesium alloy during casting, are additionally provided, as described further below.
  • the aluminum engine block 2 with the deck 3 and interconnected cylinder tubes 5, with which the casing walls 6, 6 'delimit separate coolant spaces 7, 7' via the connected cylinder tubes 5.
  • the exhaust-gas-side coolant chamber 7 ' is provided with an aluminum inlet connector 19 passing through the magnesium housing 10.
  • the air-intake-side coolant chamber 7 has an outlet riser duct 20 arranged in the first end region of the aluminum engine block 2, which is connected to a connection on the cylinder head side.
  • FIGS. 2 and 3 show that the screw pipes 8 protrude from the cover walls 6, 6 'on the cover side and are each in a force-conducting connection to the deck 3 via two webs 9, which are spaced apart from one another below the coolant spaces 7, T on the cylinder tubes 5 , wherein both webs 9 with a cylinder tube section on the one hand and a web-connecting partition 24 on the other hand, one when casting the magnesium housing 10 around the aluminum Engine block 2, channel 25, which can be filled with the casting material - FIG. 4 - form the form-fit clamping of the magnesium housing 10 approximately at half the height of the housing with the aluminum cylinder insert 2.
  • the bearing seats 4 on the aluminum engine block 2 each have a channel-like recess 26 in both end faces to increase the cross-section of the cross-connections 13 of the magnesium housing 10, so that advantageously large-section belts in the cross-connections 13 for advantageous stiffening of the housing wall sections 12, 12 'of the housing 10 are achieved.
  • the crankshaft-side boundaries 27 of the recesses 26 are arranged at a distance from the center plane of the bearing of a split crankshaft bearing 29 that is sufficient for a bearing cap screw connection 28 in the bearing seats 4.
  • the storage chairs 4 To increase the positive interlocking of the cross connections 13 of the magnesium housing 10 with the aluminum storage chairs 4, the storage chairs 4 according to FIG. 2 have lateral extensions 30 with openings 31 which can be filled with the casting material when the magnesium housing 10 is cast. With this configuration, the magnesium housing 10 is also clamped to the aluminum engine block 2 at the lower end.
  • the cylinder tubes 5 have stiffening ribs 32 arranged between the deck 3 and the underside of the respective coolant space 7, 7 approximately in the middle between the webs 9 of the screw pipes 8. These stiffening ribs 32, which serve to stiffen the cylinder tubes 5, advantageously enlarge the surface of the aluminum engine block 2 for the integral connection of the magnesium housing 10.
  • the bearing caps (not shown) corresponding to the bearing blocks 4 can be integrated in a bearing frame (not shown), the crankshaft bearings 29 possibly comprising castings formed from an iron material in order to achieve a low running clearance.
  • Ventilation channels 33 and oil return channels 15 are provided in the magnesium housing 10, which are distributed over the two long sides and each have a rectangular cross-section 34 oriented transversely to the longitudinal axis of the machine, the walls of FIG Channels 15, 33 are connected to longitudinal ribs 35 of the housing and in the connection areas of channels and longitudinal ribs 35 for aluminum screws, screw bosses 36 are provided for connecting motor support elements and / or auxiliary units.
  • laterally directed pins 37 penetrating the magnesium housing 10 can be arranged on one or more of the bearing seats 4 arranged on the aluminum engine block 2, each with a screw-in thread for aluminum screws for fastening separate devices (FIG. 5).
  • the aluminum engine block 2 has sealing flanges 38 on the casing walls 6, 6 ′ that are flush with the cylinder tubes 5 and cover the magnesium housing 10.
  • the above-mentioned bearing frame which accommodates the bearing chairs 4, is preferably also made of a magnesium alloy.
  • the cylinder crankcase 1 designed according to the invention is designed in such a way that the cooling water of the liquid operating materials is carried exclusively in aluminum parts, whereas the lubricating oil is conveyed predominantly in magnesium parts.
  • the aluminum alloy is preferably a eutectic or hypereutectic Alusil connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

A cylinder block and crankcase for a liquid-cooled internal-combustion engine is to be constructed by composite casting, a magnesium case being cast around an aluminum power unit block. The cylinder block and crankcase is conceived such that the aluminum power unit block is significantly used for the distribution of force between the cylinder head and the crankshaft bearing caps as well as for the guiding of the cooling water, in which case, the magnesium case is free of a cooling water guidance and predominantly used for the guiding of lubricating oil and, in addition, is correspondingly designed for the proportional stiffening against bending and torsion loads.

Description

Zylinderkurbelgehäuse für eine flussigkeitsgekuhlte BrennkraftmaschineCylinder crankcase for a liquid-cooled internal combustion engine
Die Erfindung bezieht sich auf ein Zylinderkurbelgehäuse für eine flüssigkeits- gekühlte Brennkraftmaschine.The invention relates to a cylinder crankcase for a liquid-cooled internal combustion engine.
Zur Gewichtsreduzierung eines Zylinderkurbelgehäuses ist es bekannt, den hochbelasteten, im wesentlichen aus den Zylindern mit unmittelbar oder mittelbar angeformten Kurbelwellen-Lagern gebildeten Triebwerksblock vorzugsweise aus einem höher belastbaren Werkstoff herzustellen und die geringer belasteten Gehäusewände gesondert aus einem leichteren, insbesondere dünnwandig verfertigten Material auszubilden unter Beachtung einer materialangepassten getrennten Führung für flüssige Betriebsstoffe.To reduce the weight of a cylinder crankcase, it is known to produce the highly loaded engine block, which is essentially formed from the cylinders with directly or indirectly formed crankshaft bearings, preferably from a material that can withstand higher loads, and to design the less loaded housing walls separately from a lighter, in particular thin-walled material, taking into account a material-adapted separate guide for liquid operating materials.
Aus der DE 43 06 269 A1 ist ein Zylinderkurbelgehäuse für eine flussigkeitsgekuhlte Brennkraftmaschine bekannt, bei dem ein Triebswerksblock mit an einem Deck kurbelwellenseitig angeformten Lagerstühlen und darüber einstückig angeordneten Zylinderrohren von einem Gehäusemantel umhüllt ist, wobei der Gehäusemantel über einen Flansch mit dem Deck in abdichtbarer Verbindung steht zur Trennung des schmierölführenden Kurbelraumes von einem den Zylinderrohren zugeordneten Kühlmittelraum. Für dieses lediglich als Bauprinzip dargestellte Zylinderkurbelgehäuse ist die Verwendung unterschiedlicher Materialien für den Triebwerksblock und die Ummantelung denkbar, als Vorbild für eine betriebsfähige Brennkraftmaschine scheidet dieses Zylinderkurbelgehäuse jedoch aus. Demgegenüber zeigt und beschreibt die DE 44 09 750 A1 ein vorbiidhaftes Zylinderkurbelgehäuse für eine flussigkeitsgekuhlte Brennkraftmaschine mit einem im wesentlichen aus Magnesium bestehenden Gehäuse mit einem mehrere in Reihe angeordnete Zylinderrohre umfassenden Zylindereinsatz. Zur materialangepassten, getrennten Führung flüssiger Betriebsstoffe weist der vom Magnesium umgossene Zylindereinsatz aus einer Aluminiumlegierung im zylinderkopfseitigen Endbereich eine die miteinander verbundenen Zylinderrohre umgebende Hüllwand zur Ausbildung eines Kühlmittelraumes auf, so dass Schmieröl als weiterer flüssiger Betriebsstoff vorzugsweise in im Magnesium-Gehäuse ausgebildeten Kanälen geführt ist. Zwar ist bei diesem bekannten Zylinderkurbelgehäuse sichergestellt, dass Kühlwasser als Kühlmittel nicht im Magnesium-Gehäuse geführt wird, jedoch ist dieses Magnesium-Gehäuse mit integrierten Lagerstühleπ in leichtgewichtiger Bauweise für eine Brennkraftmaschine mit hoher Leistung wenig geeignet.From DE 43 06 269 A1 a cylinder crankcase for a liquid-cooled internal combustion engine is known, in which an engine block with bearing seats molded onto a crankshaft side and cylinder tubes arranged in one piece above it is encased by a housing jacket, the housing jacket being connected to the deck in a sealable connection via a flange stands for the separation of the lubricating oil-carrying crank chamber from a coolant chamber assigned to the cylinder tubes. For this cylinder crankcase, which is only shown as a construction principle, the use of different materials for the engine block and the casing is conceivable, but this cylinder crankcase is ruled out as a model for an operational internal combustion engine. In contrast, DE 44 09 750 A1 shows and describes a prebiotic cylinder crankcase for a liquid-cooled internal combustion engine with an essentially magnesium housing with a cylinder insert comprising a plurality of cylinder tubes arranged in series. For the material-specific, separate management of liquid operating fluids, the magnesium-cast cylinder insert made of an aluminum alloy in the end area on the cylinder head side has an envelope wall surrounding the interconnected cylinder tubes to form a coolant chamber, so that lubricating oil as a further liquid operating fluid is preferably guided in channels formed in the magnesium housing. Although it is ensured in this known cylinder crankcase that cooling water is not carried as a coolant in the magnesium housing, this magnesium housing with integrated bearing chairs in a lightweight construction is not very suitable for an internal combustion engine with high performance.
Demgegenüber zeigt und beschreibt die EP 0 751 289 B1 ein Zylinderkurbelgehäuse für eine flussigkeitsgekuhlte Brennkraftmaschine, bei dem ein aus einem Eisenwerkstoff gefertigter Triebwerksblock mit an einem Deck einerseits angeordneten Lagerstühlen und andererseits vorgesehenen Zylinderrohren Verwendung findet in einem durch Umgießen hergestellten Aluminium-Gehäuse. Wie aus den Zeichnungen dieses Dokumentes hervorgeht, ist der nicht dargestellte Zylinderkopf im Aluminium-Gehäuse verschraubt, wogegen die Lagerdeckel der Kurbelwellenlager mit den aus dem Eisenwerkstoff gebildeten Lagerstühlen verschraubt sind. Damit verläuft der Kraftfluss zwischen Zylinderkopf und den Kurbelwellen-Lager- deckein in nachteiliger Weise über Materialien mit unterschiedlichen Wärmedehnungs-Werten. Dies erfordert beispielsweise eine Zylinderkopfdichtung mit besonders hoher Pressung.In contrast, EP 0 751 289 B1 shows and describes a cylinder crankcase for a liquid-cooled internal combustion engine, in which an engine block made of an iron material with bearing seats arranged on the deck on the one hand and cylinder tubes provided on the other hand is used in an aluminum housing produced by casting. As can be seen from the drawings of this document, the cylinder head, not shown, is screwed into the aluminum housing, whereas the bearing caps of the crankshaft bearings are screwed to the bearing seats formed from the iron material. The flow of force between the cylinder head and the crankshaft bearing cover thus runs disadvantageously over materials with different thermal expansion values. This requires, for example, a cylinder head gasket with particularly high pressure.
Diese Probleme sind bei einem Zylinderkurbelgehäuse für eine flussigkeitsgekuhlte Brennkraftmaschine gemäß der DE 195 40 763 C1 vermieden, bei dem ein aus einem Eisenwerkstoff gefertigter Triebwerksblock mit an einem Deck einerseits angeordneten Lagestühlen und andererseits einstückig vorgesehenen Zylinderrohren zusätzlich relativ freistehende Schraubenpfeifen für die Zylinderkopfverschraubung vorgesehen sind. Dieser relativ schwergewichtige Triebwerksblock kann von einem Gehäuse aus einer Aluminium- oder Magnesium-Legierung umgössen sein, wobei jedoch für den Fall eines Magnesium-Gehäuses zur Vermeidung eines nachteiligen Kontaktes mit dem Kühlwasser ein aufwendiger Korrosionsschutz vorzusehen ist.These problems are avoided in a cylinder crankcase for a liquid-cooled internal combustion engine according to DE 195 40 763 C1, in which an engine block made of an iron material with, on the one hand, deck chairs arranged on a deck and, on the other hand, cylinder tubes provided in one piece, relatively free-standing screw pipes are provided for the cylinder head screw connection. This relatively heavy engine block can be from one Housing cast from an aluminum or magnesium alloy, but in the case of a magnesium housing to avoid disadvantageous contact with the cooling water, complex corrosion protection must be provided.
Der Erfindung liegt die Aufgabe zugrunde, für ein im Verbundguss hergestelltes Zylinderkurbelgehäuse aus einer Aluminium- und einer Magnesium-Legierung bei materialangepasst getrennter Führung erforderlicher flüssiger Betriebsstoffe eine Kräfte und Momente sicher aufnehmende Struktur aufzuzeigen.The invention is based on the object of demonstrating a structure that reliably absorbs forces and moments for a cylinder crankcase made of an aluminum and a magnesium alloy produced in composite casting and with the appropriate management of the required liquid operating materials in a material-adapted manner.
Diese Aufgabe ist mit dem Patentanspruch 1 gelöst.This object is achieved with patent claim 1.
Der Vorteil der Erfindung ist darin zu sehen, dass einerseits der mit Kühlmittelräumen ausgebildete Triebwerksblock aus einer Aluminium-Legierung den Kraftfluss zwischen dem Zylinderkopf und den Kurbelwellen-Lagerdeckeln aufnimmt und die- ser andererseits beim Umguss einer Magnesium-Legierung für das Gehäuse über verfüllbare Durchbrechungen und Kanäle mit dem Alu-Triebwerksblock eine biegesteife und torsionsfeste Einheit bildet, die durch gezielte Detailausbildungen des Magnesium-Gehäuses vorteilhaft unterstützt ist.The advantage of the invention can be seen in the fact that on the one hand the engine block formed with an aluminum alloy with coolant spaces absorbs the flow of force between the cylinder head and the crankshaft bearing caps and on the other hand it has fillable openings and castings when a magnesium alloy is cast around the housing Channels with the aluminum engine block forms a rigid and torsion-resistant unit, which is supported by targeted detailed training of the magnesium housing.
Vorteilhafte Ausgestaltungen sind in den Unteransprüchen beschrieben.Advantageous configurations are described in the subclaims.
Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels beschrieben. Es zeigtThe invention is described with reference to an embodiment shown in the drawing. It shows
Figur 1 ein Zylinderkurbelgehäuse in perspektivischer Ansicht,FIG. 1 shows a cylinder crankcase in a perspective view,
Figur 2 einen erfindungsgemäßen Triebwerksblock in perspektivischer Ansicht,FIG. 2 shows an engine block according to the invention in a perspective view,
Figur 3 einen Schnitt durch den Triebwerksblock gemäß der Linie lll-lll inFigure 3 shows a section through the engine block along the line III-III in
Figur 2,Figure 2,
Figur 4 einen Schnitt gemäß der Linie IV-IV im Zylinderkurbelgehäuse gemäßFigure 4 shows a section along the line IV-IV in the cylinder crankcase
Figur 1 , und Figur 5 einen Detail-Schnitt durch ein abgewandelt ausgebildetes Zylinderkurbelgehäuse.Figure 1, and Figure 5 shows a detail section through a modified cylinder crankcase.
Ein Zylinderkurbelgehäuse 1 für eine nicht näher gezeigte, flussigkeitsgekuhlte Brennkraftmaschine umfasst einen aus einer Aluminium-Legierung gefertigten Triebwerksblock 2 mit an einem Deck 3 kurbelwellenseitig angeformten Lagerstühlen 4 und darüber einstückig angeordneten Zylinderrohren 5, die mit an diesen angeformten Hüllwänden 6, 6' zylinderkopfseitige Kühlmittelräume 7, 7' begrenzen.A cylinder crankcase 1 for a liquid-cooled internal combustion engine (not shown in any more detail) comprises an engine block 2 made of an aluminum alloy with bearing seats 4 formed on the deck 3 on the crankshaft side and cylinder tubes 5 arranged in one piece above it and having coolant spaces 7 on the cylinder head side formed on them , 7 'limit.
In den relativ kurzen bzw. niedrigen Hüllwänden 6, 6' sind einer Zylinderkopf- verschraubung dienende Schraubenpfeifen 8 ausgeformt, die mit dem Deck 3 über an den Zylinderrohren 5 angeordnete Stege 9 zu den Lagerstühlen 4 in kraftleitender Verbindung stehen. Damit ist in vorteilhafter Weise sicher gestellt, dass der Kraftfluss zwischen dem nicht gezeigten Zylinderkopf der nicht näher dargestellten Brennkraftmaschine und den mit den Lagerstühlen 4 korrespondierenden Lagerdeckeln ausschließlich in dem höherfestigen Alu-Triebwerksblock 2 verläuft.In the relatively short or low cladding walls 6, 6 ′, screw pipes 8 serving as a cylinder head screw connection are formed, which are connected to the deck 3 by means of webs 9 arranged on the cylinder tubes 5 and connected to the bearing chairs 4 in a force-conducting connection. This advantageously ensures that the power flow between the cylinder head (not shown) of the internal combustion engine (not shown in more detail) and the bearing caps corresponding to the bearing blocks 4 runs exclusively in the higher-strength aluminum engine block 2.
Zur Erzielung eines leichtgewichtigen und trotzdem hochsteifen Zylinderkurbel- gehäuses 1 ist der Alu-Triebwerksblock 2 in ein aus einer Magnesium-Legierung gefertigten Gehäuse 10 eingegossen mit einen Kurbelraum 11 begrenzenden Gehäusewandabschnitten 12, 12'.In order to achieve a lightweight, yet highly rigid cylinder crankcase 1, the aluminum engine block 2 is cast into a housing 10 made of a magnesium alloy with housing wall sections 12, 12 ′ delimiting a crank chamber 11.
Wie aus Figur 4 näher ersichtlich, sind die einander gegenüberliegenden Gehäuse- wandabschnitte 12, 12' miteinander über Querverbindungen 13 verbunden, wobei in die Gehäusewandabschnitte 12, 12' versteifenden Querverbindungen 13 ein jeweiliger Lagerstuhl 4 eingegossen ist. Zwischen den Querverbindungen 13 der Gehäusewandabschnitte 12, 12' und den umgossenen Lagerstühlen 4 werden in vorteilhafter Weise Schrumpfverbindungen erzielt, die der Verteilung von Kräften und Momenten auf Alu-Triebwerksblock 2 und Magnesium-Gehäuse 10 dienlich sind.As can be seen in more detail from FIG. 4, the housing wall sections 12, 12 ′ lying opposite one another are connected to one another via cross connections 13, wherein a respective bearing bracket 4 is cast into the housing wall sections 12, 12 ′ stiffening cross connections 13. Between the cross connections 13 of the housing wall sections 12, 12 'and the encapsulated storage chairs 4, shrink connections are advantageously achieved which are useful for distributing forces and moments to the aluminum engine block 2 and the magnesium housing 10.
Das ausschließlich zur Führung des Schmieröles mit Ölkanälen 14, 15 ausgebildete Magnesium-Gehäuse 10 ist in einem ersten Endbereich mittels eines einstückig angeordneten stirnseitigen Schachtes 16 versteift, insbesondere torsionsversteift. Im anderen, zweiten Endbereich umschließt das Magnesium-Gehäuse 10 am Alu- Triebwerksblock 2 über Rippen 17 abgestützt angeordnete Gewindeaugen 18, die einem lösbaren Anschluss einer nicht gezeigten Kupplungs- oder Getriebeglocke dienen.The magnesium housing 10, which is designed exclusively for guiding the lubricating oil with oil channels 14, 15, is stiffened, in particular torsion-stiffened, in a first end region by means of an end-side shaft 16 arranged in one piece. In the other, second end area, the magnesium housing 10 encloses threaded eyes 18, which are supported on the aluminum engine block 2 by means of ribs 17 and serve for releasable connection of a clutch or transmission bell, not shown.
Zur Erzielung einer zusätzlichen Verklammerung zwischen dem Magnesium-Gehäuse 10 und dem Alu-Triebwerksblock 2 sind an diesem verteilt angeordnet vorgesehene, von der Magnesium-Legierung beim Gießen durchsetzte Durchbrechungen und verfüllbare Kanäle zusätzlich vorgesehen, wie im weiteren beschrieben.In order to achieve additional interlocking between the magnesium housing 10 and the aluminum engine block 2, perforations and fillable channels, which are interspersed with the magnesium alloy during casting, are additionally provided, as described further below.
Wie aus Figur 2 ersichtlich, umfasst der Alu-Triebwerksblock 2 mit dem Deck 3 und miteinander verbundene Zylinderrohe 5, womit die Hüllwände 6, 6' über die verbundenen Zylinderrohre 5 voneinander gesonderte Kühlmittelräume 7, 7' begrenzen. Wie aus Figur 2 weiter ersichtlich, ist der abgasseitige Kühlmittelraum 7' mit einem das Magnesium-Gehäuse 10 durchsetzenden Alu-Zulaufstutzen 19 versehen, des weiteren weist der luftansaugseitige Kühlmittelraum 7 einen im ersten Endbereich des Alu-Triebwerkblockes 2 angeordneten Ablauf-Steigkanal 20 auf, der mit einem zylinderkopfseitigen Anschluss in Verbindung steht.As can be seen from FIG. 2, the aluminum engine block 2 with the deck 3 and interconnected cylinder tubes 5, with which the casing walls 6, 6 'delimit separate coolant spaces 7, 7' via the connected cylinder tubes 5. As can also be seen from FIG. 2, the exhaust-gas-side coolant chamber 7 'is provided with an aluminum inlet connector 19 passing through the magnesium housing 10. Furthermore, the air-intake-side coolant chamber 7 has an outlet riser duct 20 arranged in the first end region of the aluminum engine block 2, which is connected to a connection on the cylinder head side.
Wie aus den Figuren 1 und 4 erkennbar, enden die Zylinderrohre 5 und die Hüllwände 6, 6' des Alu-Triebwerksblockes 2 mit dem Magnesium-Gehäuse 10 zylin- derkopfseitig bündig in einer gemeinsamen Dichtfläche 21 , wobei für eine zusätzliche, dichtflächennahe Anbindung das Magnesium-Gehäuse 10 mittels beim Gießen durchsetzbarer Durchbrechungen 22 in auf den Hüllwänden 6, 6' außenseitig unter der Dichtfläche 21 Schraubenpfeifen 8 verbindenden Flanschen 23 zusätzlich formschlüssig verbunden ist.As can be seen from FIGS. 1 and 4, the cylinder tubes 5 and the casing walls 6, 6 'of the aluminum engine block 2 with the magnesium housing 10 end flush on the cylinder head side in a common sealing surface 21, the magnesium being used for an additional connection close to the sealing surface -Housing 10 is additionally positively connected by means of openings 22 which can be passed through during casting in flanges 23 which connect screw pipes 8 on the outside of the casing walls 6, 6 'under the sealing surface 21.
Die Figuren 2 und 3 zeigen, dass die Schraubenpfeifen 8 die Hüllwände 6, 6' deck- seitig überstehend ausgebildet sind und jeweils über zwei unterhalb der Kühlmittelräume 7, T an den Zylinderrohren 5 gegenseitig beabstandet angeordnete Stege 9 mit dem Deck 3 in kraftleitender Verbindung stehen, wobei beide Stege 9 mit einem Zylinderrohrabschnitt einerseits und einer stegverbindenden Zwischenwand 24 andererseits einen beim Gießen des Magnesium-Gehäuses 10 um den Alu- Triebwerksblock 2 vom Gießmaterial verfüllbaren Kanal 25 - Figur 4 - bilden zur formschlüssigen Verklammerung des Magnesium-Gehäuses 10 etwa auf halber Gehäusehöhe mit dem Alu-Zylindereinsatz 2.FIGS. 2 and 3 show that the screw pipes 8 protrude from the cover walls 6, 6 'on the cover side and are each in a force-conducting connection to the deck 3 via two webs 9, which are spaced apart from one another below the coolant spaces 7, T on the cylinder tubes 5 , wherein both webs 9 with a cylinder tube section on the one hand and a web-connecting partition 24 on the other hand, one when casting the magnesium housing 10 around the aluminum Engine block 2, channel 25, which can be filled with the casting material - FIG. 4 - form the form-fit clamping of the magnesium housing 10 approximately at half the height of the housing with the aluminum cylinder insert 2.
Wie insbesondere aus Figur 2 ersichtlich, weisen die Lagerstühle 4 am Alu-Triebwerksblock 2 zur bereichsweisen Querschnittsteigerung der Querverbindungen 13 des Magnesium-Gehäuses 10 jeweils in beiden Stirnseiten eine rinnenartige Vertiefung 26 auf, womit in vorteilhafter Weise querschnittsstarke Gurte in den Querverbindungen 13 zur vorteilhaften Aussteifung der Gehäusewandabschnitte 12, 12' des Gehäuses 10 erzielt sind. Im Hinblick auf die Lagerdeckelverschraubungen in den Alu-Lagerstühlen 4 sind kurbelwellenseitige Begrenzungen 27 der Vertiefungen 26 in einem für eine tragfähige Lagerdeckelverschraubung 28 in den Lagerstühlen 4 ausreichenden Abstand von der Lagermittenebene eines geteilten Kurbelwellenlagers 29 angeordnet.As can be seen in particular from FIG. 2, the bearing seats 4 on the aluminum engine block 2 each have a channel-like recess 26 in both end faces to increase the cross-section of the cross-connections 13 of the magnesium housing 10, so that advantageously large-section belts in the cross-connections 13 for advantageous stiffening of the housing wall sections 12, 12 'of the housing 10 are achieved. With regard to the bearing cap screw connections in the aluminum bearing seats 4, the crankshaft-side boundaries 27 of the recesses 26 are arranged at a distance from the center plane of the bearing of a split crankshaft bearing 29 that is sufficient for a bearing cap screw connection 28 in the bearing seats 4.
Zur Steigerung der formschlüssigen Verklammerung der Querverbindungen 13 des Magnesium-Gehäuses 10 mit den Alu-Lagerstühlen 4 weisen die Lagerstühle 4 gemäß Figur 2 seitliche Fortsätze 30 auf mit Durchbrechungen 31 , die beim Gießen des Magnesium-Gehäuses 10 vom Gussmaterial verfüllbar sind. Mit dieser Aus- gestaltung ist das Magnesium-Gehäuse 10 auch am unteren Ende mit dem Alu- Triebwerksblock 2 verklammert.To increase the positive interlocking of the cross connections 13 of the magnesium housing 10 with the aluminum storage chairs 4, the storage chairs 4 according to FIG. 2 have lateral extensions 30 with openings 31 which can be filled with the casting material when the magnesium housing 10 is cast. With this configuration, the magnesium housing 10 is also clamped to the aluminum engine block 2 at the lower end.
Wie insbesondere aus Figur 3 erkennbar, weisen die Zylinderrohre 5 zwischen dem Deck 3 und der Unterseite des jeweiligen Kühlmittelraumes 7, 7 etwa mittig zwi- sehen den Stegen 9 der Schraubenpfeifen 8 angeordnete Versteifungsrippen 32 auf. Diese einer Versteifung der Zylinderrohre 5 dienenden Versteifungsrippen 32 vergrößern in vorteilhafter Weise die Oberfläche des Alu-Triebwerksblockes 2 zur stoffschlüssigen Anbindung des Magnesium-Gehäuses 10.As can be seen in particular from FIG. 3, the cylinder tubes 5 have stiffening ribs 32 arranged between the deck 3 and the underside of the respective coolant space 7, 7 approximately in the middle between the webs 9 of the screw pipes 8. These stiffening ribs 32, which serve to stiffen the cylinder tubes 5, advantageously enlarge the surface of the aluminum engine block 2 for the integral connection of the magnesium housing 10.
Zur zusätzlichen Aussteifung bzw. Versteifung des Zylinderkurbelgehäuses 1 können die mit den Lagerstühlen 4 korrespondierenden, nicht gezeigten Lagerdeckel in einem nicht dargestellten Lagerrahmen integriert sein, wobei die Kurbelwellenlager 29 zur Erzielung eines geringen Laufspieles ggf. aus einem Eisenwerkstoff gebildete Eingussteile umfassen. Eine weitere Versteifung gegen Biege- und Torsionsbelastungen ist schließlich dadurch erreicht, dass im Magnesium-Gehäuse 10 über die beiden Längsseiten verteilt angeordnete Entlüftungskanäle 33 und Ölrücklaufkanäle 15 vorgesehen sind, die jeweils einen quer zur Maschinenlängsachse ausgerichteten Rechteck-Querschnitt 34 aufweisen, wobei die Wandungen der Kanäle 15, 33 mit Gehäuse-Längsrippen 35 in Verbindung stehen und in den Verbindungsbereichen von Kanälen und Längsrippen 35 für Alu-Schrauben ausgelegte Schraubenbutzen 36 zum Anschluss von Motor-Tragelementen und/oder Nebenaggregaten vorgesehen sind.For additional stiffening or stiffening of the cylinder crankcase 1, the bearing caps (not shown) corresponding to the bearing blocks 4 can be integrated in a bearing frame (not shown), the crankshaft bearings 29 possibly comprising castings formed from an iron material in order to achieve a low running clearance. A further stiffening against bending and torsional loads is finally achieved by the fact that ventilation channels 33 and oil return channels 15 are provided in the magnesium housing 10, which are distributed over the two long sides and each have a rectangular cross-section 34 oriented transversely to the longitudinal axis of the machine, the walls of FIG Channels 15, 33 are connected to longitudinal ribs 35 of the housing and in the connection areas of channels and longitudinal ribs 35 for aluminum screws, screw bosses 36 are provided for connecting motor support elements and / or auxiliary units.
Zur Erzielung höher belastbarer Anschlussstellen können an einem oder mehreren der am Alu-Triebwerksblock 2 angeordneten Lagerstühle 4 seitlich gerichtete, das Magnesium-Gehäuse 10 durchsetzende Zapfen 37 angeordnet sein mit jeweils einem Einschraubgewinde für Alu-Schrauben zur Befestigung gesonderter Ein- richtungen (Figur 5).To achieve higher loadable connection points, laterally directed pins 37 penetrating the magnesium housing 10 can be arranged on one or more of the bearing seats 4 arranged on the aluminum engine block 2, each with a screw-in thread for aluminum screws for fastening separate devices (FIG. 5). ,
Schließlich kann zur Erzielung einer materialeinheitlichen Dichtfläche 21 auch vorgesehen sein, dass der Alu-Triebwerksblock 2 an den Hüllwänden 6, 6' mit den Zylinderrohren 5 bündig gestaltete, das Magnesium-Gehäuse 10 überdeckende Dicht- flansche 38 aufweist.Finally, in order to achieve a sealing surface 21 with the same material, it can also be provided that the aluminum engine block 2 has sealing flanges 38 on the casing walls 6, 6 ′ that are flush with the cylinder tubes 5 and cover the magnesium housing 10.
Der weiter vorne genannte, die Lagerstühle 4 aufnehmende Lagerrahmen ist vorzugsweise auch aus einer Magnesium-Legierung.The above-mentioned bearing frame, which accommodates the bearing chairs 4, is preferably also made of a magnesium alloy.
Das erfindungsgemäß gestaltete Zylinderkurbelgehäuse 1 ist so konzipiert, dass von den flüssigen Betriebsstoffen das Kühlwasser ausschließlich in Aluminium-Teilen geführt ist, wogegen das Schmieröl überwiegend in Magnesium-Teilen gefördert ist.The cylinder crankcase 1 designed according to the invention is designed in such a way that the cooling water of the liquid operating materials is carried exclusively in aluminum parts, whereas the lubricating oil is conveyed predominantly in magnesium parts.
Als Aluminium-Legierung ist vorzugsweise an eine eutektische oder übereutektische Alusil-Verbindung gedacht. The aluminum alloy is preferably a eutectic or hypereutectic Alusil connection.

Claims

Patentansprüche claims
1. Zylinderkurbelgehause für eine flussigkeitsgekuhlte Brennkraftmaschine, - umfassend einen aus einer Alu-Legierung gefertigten Triebwerksblock (2) mit an einem Deck (3) kurbelwellenseitig aπgeformten Lagerstühlen (4) und darüber einstückig angeordneten Zylinderrohren (5), die mit an diesen angeformten Hüllwänden(6, 6') zylinderkopfseitige Kühlmittelräume (7, 7') begrenzen, wobei in den relativ kurzen bzw. niedrigen Hüllwänden (6, 6') ausgeformte, einer Zylinderkopfverschraubung dienende Schraubenpfeifen (8) über an den Zylinderrohren (5) angeordnete Stege (9) mit dem Deck (3) in kraftleitender Verbindung stehen, und dass weiter - der Alu-Triebwerksblock (2) in ein aus einer Magnesium-Legierung gefertigten Gehäuse (10) eingegossen ist mit einen Kurbelraum (1 1 ) begrenzenden Gehäusewandabschnitten (12, 12'), die miteinander über Querverbindungen (13) mit eingegossenen Lagerstühlen (4) verbunden sind, ferner - dass das mit Ölkanälen (14, 15) ausgebildete Magnesium-Gehäuse1.Cylinder crankcase for a liquid-cooled internal combustion engine, - comprising an engine block (2) made of an aluminum alloy with bearing seats (4) formed on a deck (3) on the crankshaft side and cylinder tubes (5) arranged in one piece above it, which with molded envelope walls (5) 6, 6 ') delimit coolant spaces (7, 7') on the cylinder head side, with screw pipes (8) formed in the relatively short or low envelope walls (6, 6 ') serving for screwing the cylinder head via webs (9) arranged on the cylinder tubes (5) ) are in a force-conducting connection with the deck (3), and that further - the aluminum engine block (2) is cast into a housing (10) made of a magnesium alloy with housing wall sections (12, 12) delimiting a crank chamber (1 1) '), which are connected to one another via cross-connections (13) with cast-in storage chairs (4), and further - that the magnesium housing formed with oil channels (14, 15) äuse
(10) in einem ersten Endbereich mittels eines einstückig angeordneten stirnseitigen Schachtes (16) versteift ist und im anderen, zweiten Endbereich am Alu-Triebwerksblock (2) über Rippen (17) abgestützt angeordnete Gewindeaugen (18) umschließt zum lösbaren Anschluss einer Kupplungs- oder Getriebeglocke, wobei schließlich das Magnesium-Gehäuse (10) mit dem Alu-Triebwerksblock (2) über an diesen verteilt angeordnet vorgesehene, von der Magnesium-Le- gierung durchsetzte Durchbrechungen und verfüllbare Kanäle zusätzlich verbunden ist.(10) is stiffened in a first end area by means of an end shaft (16) which is arranged in one piece and in the other, second end area on the aluminum engine block (2) surrounds threaded eyes (18) which are supported by ribs (17) For the detachable connection of a clutch or gearbox bell, the magnesium housing (10) finally being additionally connected to the aluminum engine block (2) via perforations and fillable channels which are arranged on the aluminum block and are penetrated by the magnesium alloy.
2. Zylinderkurbelgehause nach Anspruch 1 , dadurch gekennzeichnet, dass der Alu-Triebwerksblock (2) mit dem Deck (3) und miteinander verbundene Zylinderrohre (5) umfasst und die Hüllwände (6, 6') über entsprechend abschnittsweise verbundene Zylinderrohre (5) voneinander gesonderte Kühlmittelräume (7, 7') begrenzen, wobei der abgasseitige Kühimittelraum (7') mit einem das Magnesium-Ge- häuse (10) durchsetzenden Alu-Zulaufstutzen (19) versehen ist, und der luftansaugseitige Kühlmittelraum (7) einen im ersten Endbereich des Alu-Triebwerksblockes (2) angeordneten Ablauf-Steigkanal (20) aufweist.2. Cylinder crankcase according to claim 1, characterized in that the aluminum engine block (2) with the deck (3) and interconnected cylinder tubes (5) and the cladding walls (6, 6 ') via corresponding sectionally connected cylinder tubes (5) from each other Separate coolant spaces (7, 7 '), the coolant space (7') on the exhaust gas side being provided with an aluminum inlet connection (19) passing through the magnesium housing (10), and the coolant space (7) on the air intake side in the first end region of the aluminum engine block (2) arranged drain riser (20).
3. Zylinderkurbelgehäuse nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Zylinderrohe (5) und die Hüllwände (6, 6') des Alu- Triebwerksblockes (2) mit dem Magnesium-Gehäuse (10) zylinder- kopfseitig bündig in einer gemeinsamen Dichtfläche (21) enden, wobei - das Magnesium-Gehäuse (10) mittels beim Gießen durchsetzbarer3. Cylinder crankcase according to claim 1 and 2, characterized in that the cylinder tubes (5) and the cladding walls (6, 6 ') of the aluminum engine block (2) with the magnesium housing (10) on the cylinder head side flush in a common sealing surface (21) end, wherein - the magnesium housing (10) by means of enforceable during casting
Durchbrechungen (22) in auf den Hüllwänden (6, 6') außenseitig unter der Dichtfläche (21) Schraubenpfeifen (8) verbindenden Flanschen (23) zusätzlich formschlüssig verbunden ist.Openings (22) in flanges (23) connecting screw pipes (8) on the outside of the casing walls (6, 6 ') on the outside under the sealing surface (21) are additionally positively connected.
4. Zylinderkurbelgehäuse nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass die Schraubenpfeifen (8) die Hüllwände (6, 6') deckseitig überstehend ausgebildet sind und jeweils über zwei unterhalb der Kühlmittelräume (7, 7') an den Zylinderrohren (5) gegenseitig beabstandet angeordnete Stege (9) mit dem Deck (3) in kraftleitender Verbindung stehen, wobei beide Stege (9) mit einem Zylinderrohrabschnitt einerseits und einer stegverbindenden Zwischenwand (24) andererseits einen beim Gießen des Magnesium-Gehäuses (10) um den Alu-Triebwerksblock (2) vom Gießmaterial verfüllbaren Kanal (25) bilden zur weiteren formschlüssigen Verklammerung des Gehäuses (10) mit dem Zylindereinsatz (2).4. Cylinder crankcase according to claims 1 to 3, characterized in that the screw pipes (8), the envelope walls (6, 6 ') are formed on the top and projecting In each case via two webs (9) spaced apart from one another below the coolant chambers (7, 7 ') on the cylinder tubes (5), the deck (3) is in a force-conducting connection, both webs (9) with a cylinder tube section on the one hand and a web-connecting partition (24) on the other hand form a channel (25) which can be filled by the casting material during the casting of the magnesium housing (10) around the aluminum engine block (2) for further positive interlocking of the housing (10) with the cylinder insert (2).
5. Zylinderkurbelgehäuse nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Lagerstühle (4) zur bereichsweisen Querschnittssteigerung der Querverbindungen (13) des Magnesium-Gehäuses (10) jeweils in beiden Stirnseiten eine rinnenartige Vertiefung (26) aufweisen, wobei kurbelwellenlagerseitige Begrenzungen (27) der Vertiefungen (26) in einem für eine tragfähige Lagerdeckelverschraubung (28) in den Lagerstühlen (4) ausreichenden Abstand von der Lagermittenebene eines geteilten Kurbelwellenlagers (29) angeordnet sind.5. Cylinder crankcase according to one or more of claims 1 to 4, characterized in that the bearing seats (4) for regionally increasing the cross-section of the cross connections (13) of the magnesium housing (10) each have a channel-like depression (26) in both end faces, wherein Limits (27) of the indentations (26) on the crankshaft bearing are arranged in a distance from the center plane of the bearing of a split crankshaft bearing (29) which is sufficient for a load-bearing screw connection (28) in the bearing seats (4).
6. Zylinderkurbelgehäuse nach Anspruch 5, dadurch gekennzeichnet, dass Lagerstühle (4) seitliche Fortsätze (30) mit Durchbrechungen (31) aufweisen, die beim Gießen des Magnesium-Gehäuses (10) vom Gießmaterial ver- füllbar sind zur formschlüssigen Verklammerung der Querverbindungen (13) des Magnesium-Gehäuses (10) mit den Alu-Lagerstühlen (4).6. Cylinder crankcase according to claim 5, characterized in that bearing seats (4) have lateral extensions (30) with openings (31) which can be filled by the casting material during the casting of the magnesium housing (10) for the positive locking of the cross connections (13 ) of the magnesium housing (10) with the aluminum storage chairs (4).
7. Zylinderkurbelgehäuse nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Zylinderrohre (5) zwischen dem Deck7. cylinder crankcase according to one or more of claims 1 to 6, characterized in that the cylinder tubes (5) between the deck
(3) und der Unterseite des jeweiligen Kühlmittelraumes (7, 7') etwa mittig zwischen den paarweisen Stegen (9) der Schraubenpfeifen (8) angeordnete Versteifungsrippen (32) aufweisen. (3) and the underside of the respective coolant chamber (7, 7 ') have stiffening ribs (32) arranged approximately centrally between the pair of webs (9) of the screw pipes (8).
8. Zylinderkurbelgehäuse nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass mit den Lagerstühlen (4) korrespondierende Lagerdeckel in einem Lagerrahmen (bedpiate) integriert sind und die Kurbelwellen- lager (29) ggf. aus einem Eisenwerkstoff gebildete Eingussteile umfassen.8. Cylinder crankcase according to one or more of claims 1 to 7, characterized in that with the bearing blocks (4) corresponding bearing caps are integrated in a bearing frame (bedpiate) and the crankshaft bearing (29) optionally comprise castings formed from an iron material.
9. Zylinderkurbelgehäuse nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, - dass im Magnesium-Gehäuse (10) über die beiden Längsseiten verteilt angeordnete Entlüftungs- und Ölrücklauf-Kanäle (33, 15) vorgesehen sind, die jeweils einen quer zur Maschinenlängsachse ausgerichteten Rechteckquerschnitt (34) aufweisen, wobei - die Wandungen der Kanäle (15, 33) mit Gehäuse-Längsrippen (35) in9. cylinder crankcase according to one or more of claims 1 to 8, characterized in that - are provided in the magnesium housing (10) over the two longitudinal sides arranged ventilation and oil return channels (33, 15), each one transverse to Rectangular cross-section (34) aligned with the longitudinal axis of the machine, the walls of the channels (15, 33) with longitudinal ribs (35) in the housing
Verbindung stehen und in den Verbindungsbereichen beider für Alu-Schrauben ausgelegte Schraubenbutzen (36) zum Anschluss von Motortragelementen und/oder Nebenaggregaten vorgesehen sind.Stand connection and are provided in the connection areas of both screw slugs (36) designed for aluminum screws for connecting motor support elements and / or auxiliary units.
10. Zylinderkurbelgehäuse nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass an einem oder mehreren der am Alu-Triebwerksblock (2) angeordneten Lagerstühle (4) seitlich gerichtete, das Magnesium-Gehäuse (10) durchsetzende Zapfen (37) angeordnet sind mit je- weils einem Einschraubgewinde für insbesondere Alu-Schrauben zur Befestigung gesonderter Einrichtungen.10. Cylinder crankcase according to one or more of claims 1 to 9, characterized in that arranged on one or more of the aluminum engine block (2) arranged bearing blocks (4) laterally directed, the magnesium housing (10) penetrating pin (37) are each with a screw-in thread for aluminum screws in particular for fastening separate devices.
11. Zylinderkurbelgehäuse nach einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der Alu-Triebwerksblock (2) an den Hüll- wänden (6, 6') mit den Zylinderrohren (5) bündig gestaltete, das Magnesium-11. Cylinder crankcase according to one or more of claims 1 to 10, characterized in that the aluminum engine block (2) on the envelope walls (6, 6 ') with the cylinder tubes (5) designed flush, the magnesium
Gehäuse (10) überdeckende Dichtflansche (38) aufweist. Has housing (10) covering sealing flanges (38).
EP02700217A 2001-03-14 2002-02-08 Cylinder - crankcase of a liquid cooled internal combustion engine Expired - Lifetime EP1368562B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10112132A DE10112132A1 (en) 2001-03-14 2001-03-14 Cylinder crankcase for a liquid-cooled internal combustion engine
DE10112132 2001-03-14
PCT/EP2002/001313 WO2002073021A1 (en) 2001-03-14 2002-02-08 Zylinderkurbelgehäuse für eine flüssigkeitsgekühlte brennkraftmaschine

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EP1368562A1 true EP1368562A1 (en) 2003-12-10
EP1368562B1 EP1368562B1 (en) 2007-04-04

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US (1) US6976466B2 (en)
EP (1) EP1368562B1 (en)
JP (1) JP4078207B2 (en)
CN (1) CN1219966C (en)
AT (1) ATE358771T1 (en)
DE (2) DE10112132A1 (en)
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CN1219966C (en) 2005-09-21
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US6976466B2 (en) 2005-12-20
ATE358771T1 (en) 2007-04-15
WO2002073021A1 (en) 2002-09-19
ES2281502T3 (en) 2007-10-01
CN1457389A (en) 2003-11-19
JP2004518870A (en) 2004-06-24
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US20040035375A1 (en) 2004-02-26
DE10112132A1 (en) 2002-09-19

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