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EP2195520A1 - Cylinder crank case for an internal combustion engine - Google Patents

Cylinder crank case for an internal combustion engine

Info

Publication number
EP2195520A1
EP2195520A1 EP08801216A EP08801216A EP2195520A1 EP 2195520 A1 EP2195520 A1 EP 2195520A1 EP 08801216 A EP08801216 A EP 08801216A EP 08801216 A EP08801216 A EP 08801216A EP 2195520 A1 EP2195520 A1 EP 2195520A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
cylinder crankcase
crankcase
webs
recess
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.)
Withdrawn
Application number
EP08801216A
Other languages
German (de)
French (fr)
Inventor
Karlheinz Bing
Frank Winger
Ulrich Bischofberger
Stefan Spangenberg
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2195520A1 publication Critical patent/EP2195520A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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 
    • F02F1/004—Cylinder liners
    • 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
    • F02F7/0085—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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0002—Cylinder arrangements
    • F02F7/0007—Crankcases of engines with cylinders in line
    • 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
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/06—Silicon

Definitions

  • the invention relates to a cylinder crankcase for an internal combustion engine according to the preamble of claim 1.
  • PCT application WO 2004/009986 A1 discloses a cylinder crankcase produced by die casting for an internal combustion engine, in which a bushing composite is cast, which consists of a plurality of cylinder liners arranged in a row and interconnected by webs. For cooling, interconnected cooling channels are introduced into the cylinder liners and into the webs, forming a water jacket.
  • a bushing composite for cooling, interconnected cooling channels are introduced into the cylinder liners and into the webs, forming a water jacket.
  • the present invention seeks to avoid the disadvantages of the prior art, and to provide a low-priced cylinder crankcase with a thermally and mechanically highly resilient liner composite for pouring into the cylinder crankcase in the die-casting.
  • FIG. 1 is a partially cut cylinder crankcase with a plurality of cylinder liners arranged in the bushing composite
  • Fig. 2 is an enlarged view of an embodiment of a consisting of two blind holes coolant flow and
  • Fig. 3 shows a further embodiment of a consisting of a through bore coolant flow, which is guided through the web and through the located on both sides of the web Umgussmantel.
  • a cylinder crankcase 1 is shown, which is partially cut in the selected representation, wherein the cut surfaces are hatched.
  • the cylinder crankcase 1 consists of a hypoeutectic aluminum-silicon alloy and is produced by die casting, wherein in the cylinder crankcase 1 cylinder liners 5, 6, 7 are cast with, which are arranged in a row and connected by webs 2, 3, 4, so that a bushing composite 9 results.
  • partially cutaway view of the cylinder crankcase three cylinder liners 5, 6, 7 can be seen.
  • the cylinder crankcase 1 has oil return channels 17, 18, 19, 20 and further threaded bores 21, 22, 23, 24.
  • a recess 25 is formed for a water jacket, of which the cylinder liners 5, 6, 7 are surrounded for the purpose of cooling.
  • the recess 25 is bounded by a Umgussmantel 26, of which the cylinder liners 5, 6, 7 and arranged therebetween Webs 2, 3, 4 are surrounded, so that in the embodiment of FIG. 1 dry cylinder liners 5, 6, 7 are present.
  • the bushing composite 9 formed by the cylinder liners 5, 6, 7 is produced by low-pressure casting or by gravity casting.
  • a hypereutectic aluminum-silicon alloy is used which, in addition to aluminum, contains 15% to 21% silicon, 1% to 5% magnesium and 2% to 5% copper.
  • the aluminum-silicon alloy may further contain 0.7% to 1.5% iron and 0.3% to 0.7% manganese.
  • the coolant passage 16 is shown enlarged in FIG. 2 and consists, like the other coolant passages 14 and 15, of a first blind hole 27 introduced into the cylinder head side 30 of the web 4 with an opening 31 in the cylinder head side end 30 of the web 4 and out of one from the cylinder sleeve-side boundary surface 28 of the recess 25 from the overblown casing 26 in the web 4 introduced second blind hole 29 with an opening 32 in the encasing 26, wherein the two blind holes 27 and 29 are aligned so that the second blind hole 29 in the lower end the first blind hole 27 opens.
  • the blind bores 27 and 29 have a diameter of 2.5 mm, wherein the width of the webs 2, 3, 4 is 7 mm in each case.
  • the flow of the coolant, water, through the coolant passage 16 takes place (see FIG. 2) in the present embodiment in the direction of the arrows 31 and 32, since in the assembled engine, the cylinder head, not shown in the figures, is mounted on the cylinder crankcase 1 in that the pressure of the cooling water located in the recess 25 is sufficiently great to drive a portion of the cooling water through the blind bores 29 and 27 and thus to cool the upper portion of the web 4, which is one of the thermally most heavily loaded parts of an internal combustion engine.
  • FIG. 3 shows an embodiment of the cylinder crankcase 1, in which the coolant passages 33 formed in the webs 2, 3, 4 have two openings 34, 35, both of which open via the encasing jacket 26 into the recess 25 for the water jacket.
  • the coolant passages 14, 15, 16 and 33 as well as the blind bores 27 and 29 can be produced by erosion.

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

The invention relates to a cylinder crankcase (1) for an internal combustion engine, into which crankcase a one-piece cylinder jacket system (9) is diecast, said system comprising at least two cylinder jackets (5, 6, 7) that are arranged in a row and that are interconnected via webs (2, 3, 4). The aim of the invention is to provide a cylinder crankcase which can be produced at low cost and which comprises a cylinder jacket system that can be subjected to high thermal and mechanical stresses. According to the invention, a lateral face of the cylinder jacket system (9) has a rough structure and is surrounded by a diecast outer casing (26). Respective coolant passages (14, 15, 16) having openings (31, 32) for supplying and discharging the coolant are formed into the webs (2, 3, 4), at least one opening (32) extending through the outer casing (26) into the recess (25) for the water cooling jacket.

Description

Zylinderkurbelgehäuse für einen Verbrennungsmotor Cylinder crankcase for an internal combustion engine
Die Erfindung betrifft ein Zylinderkurbelgehäuse für einen Verbrennungsmotor nach dem Oberbegriff des Anspruches 1.The invention relates to a cylinder crankcase for an internal combustion engine according to the preamble of claim 1.
Aus der PCT-Anmeldung WO 2004/009986 A1 ist ein im Druckgussverfahren hergestelltes Zylinderkurbelgehäuse für einen Verbrennungsmotor bekannt, in das ein Laufbuchsenverbund eingegossen ist, der aus mehreren in einer Reihe angeordneten und über Stege miteinander verbundenen Zylinderlaufbuchsen besteht. Zur Kühlung sind in die Zylinderlaufbuchsen und in die Stege miteinander verbundene Kühlkanäle eingebracht, die einen Wassermantel bilden. Nachteilig ist hierbei zum einen, dass die Herstellung von Zylinderlaufbuchsen mit darin befindlichen Kühlkanälen sehr aufwändig ist. Zum anderen sind Zylinderlaufbuchsen mit in deren Wandung eingebrachten Kanälen nur dann zum Eingießen in ein im Druckgussverfahren herzustellendes Zylinderkurbelgehäuse verwendbar, wenn hierbei die Kanäle während des Druckgussverfahrens mit Sand oder Salz gefüllt werden, damit die im Bereich der Kanäle sehr dünnwandigen Zylinderlaufbuchsen während des Gießens keinen Schaden nehmen.PCT application WO 2004/009986 A1 discloses a cylinder crankcase produced by die casting for an internal combustion engine, in which a bushing composite is cast, which consists of a plurality of cylinder liners arranged in a row and interconnected by webs. For cooling, interconnected cooling channels are introduced into the cylinder liners and into the webs, forming a water jacket. The disadvantage here on the one hand, that the production of cylinder liners with cooling channels therein is very complex. On the other hand, cylinder liners with channels introduced in their walls can only be used for pouring into a die-cast cylinder crankcase if the channels are filled with sand or salt during the die casting process, so that the cylinder liners in the region of the channels are not damaged during casting to take.
Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, die Nachteile des Standes der Technik zu vermeiden, und ein preisgünstig herstellbares Zylinderkurbelgehäuse mit einem thermisch und mechanisch hochbelastbaren Laufbuchsenverbund zum Eingießen in das Zylinderkurbelgehäuse im Druckgussverfahren zu schaffen.Proceeding from this, the present invention seeks to avoid the disadvantages of the prior art, and to provide a low-priced cylinder crankcase with a thermally and mechanically highly resilient liner composite for pouring into the cylinder crankcase in the die-casting.
Gelöst wird diese Aufgabe mit den im Kennzeichen des Hauptanspruches stehenden Merkmalen. Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Hierbei werden aus Vollmaterial bestehende Zylinderlaufbuchsen ohne in deren Zylinderwände eingebrachte Kanäle verwendet, die stabil aufgebaut und preisgünstig herstellbar sind. Außerdem dichtet die Raustruktur der radial äußeren Seitenfläche insbesondere im Bereich der Grenzflächen zwischen den Stegen und dem Umguss- mantel die in diesem Bereich durch die Stege und den Umgussmantel geführten Kühlmitteldurchlässe gegen einen Austritt des Kühlwassers ab.This problem is solved with the features in the characterizing part of the main claim. Advantageous embodiments of the invention are the subject of the dependent claims. Here are made of solid material cylinder liners without inserted in the cylinder walls channels used, which are stable and inexpensive to produce. In addition, the structure of the radially outer side surface, in particular in the region of the boundary surfaces between the webs and the encapsulation jacket, seals the coolant passages guided in this area by the webs and the encapsulation jacket against leakage of the cooling water.
Einige Ausführungsbeispiele der Erfindung werden im Folgenden anhand derSome embodiments of the invention will be described below with reference to FIG
Zeichnungen beschrieben. Es zeigenDrawings described. Show it
Fig. 1 ein teilweise aufgeschnittenes Zylinderkurbelgehäuse mit mehreren, im Laufbuchsenverbund angeordneten Zylinderlaufbuchsen,1 is a partially cut cylinder crankcase with a plurality of cylinder liners arranged in the bushing composite,
Fig. 2 eine vergrößerte Darstellung einer Ausgestaltung eines aus zwei Sacklochbohrungen bestehenden Kühlmitteldurchflusses undFig. 2 is an enlarged view of an embodiment of a consisting of two blind holes coolant flow and
Fig. 3 eine weitere Ausgestaltung eines aus einer durchgehenden Bohrung bestehenden Kühlmitteldurchflusses, die durch den Steg und durch den beidseitig des Steges befindlichen Umgussmantel geführt ist.Fig. 3 shows a further embodiment of a consisting of a through bore coolant flow, which is guided through the web and through the located on both sides of the web Umgussmantel.
In Fig. 1 ist ein Zylinderkurbelgehäuse 1 dargestellt, das in der gewählten Darstellung teilweise aufgeschnitten ist, wobei die Schnittflächen schraffiert sind. Das Zylinderkurbelgehäuse 1 besteht aus einer untereutektischen Aluminium-Silizium-Legierung und wird im Druckgussverfahren hergestellt, wobei in das Zylinderkurbelgehäuse 1 Zylinderlaufbuchsen 5, 6, 7 mit eingegossen werden, die in einer Reihe angeordnet und über Stege 2, 3, 4 miteinander verbunden sind, sodass sich ein Laufbuchsenverbund 9 ergibt. In der vorliegenden, teilweise aufgeschnittenen Darstellung des Zylinderkurbelgehäuses sind drei Zylinderlaufbuchsen 5, 6, 7 erkennbar.In Fig. 1, a cylinder crankcase 1 is shown, which is partially cut in the selected representation, wherein the cut surfaces are hatched. The cylinder crankcase 1 consists of a hypoeutectic aluminum-silicon alloy and is produced by die casting, wherein in the cylinder crankcase 1 cylinder liners 5, 6, 7 are cast with, which are arranged in a row and connected by webs 2, 3, 4, so that a bushing composite 9 results. In the present, partially cutaway view of the cylinder crankcase three cylinder liners 5, 6, 7 can be seen.
Das Zylinderkurbelgehäuse 1 weist Ölrücklaufkanäle 17, 18, 19, 20 und weiterhin Verschraubungsbohrungen 21 , 22, 23, 24 auf. Darüber hinaus ist in das Zylinderkurbelgehäuse 1 eine Ausnehmung 25 für einen Wassermantel eingeformt, von dem die Zylinderlaufbuchsen 5, 6, 7 zum Zweck der Kühlung umgeben sind. Auf Seiten der Zylinderlaufbuchsen 5, 6, 7 wird die Ausnehmung 25 von einem Umgussmantel 26 begrenzt, von dem die Zylinderlaufbuchsen 5, 6, 7 und die dazwischen angeordneten Stege 2, 3, 4 umgeben sind, sodass im Ausführungsbeispiel gemäß Fig. 1 trockene Zylinderlaufbuchsen 5, 6, 7 vorliegen.The cylinder crankcase 1 has oil return channels 17, 18, 19, 20 and further threaded bores 21, 22, 23, 24. In addition, in the cylinder crankcase 1, a recess 25 is formed for a water jacket, of which the cylinder liners 5, 6, 7 are surrounded for the purpose of cooling. On the side of the cylinder liners 5, 6, 7, the recess 25 is bounded by a Umgussmantel 26, of which the cylinder liners 5, 6, 7 and arranged therebetween Webs 2, 3, 4 are surrounded, so that in the embodiment of FIG. 1 dry cylinder liners 5, 6, 7 are present.
Die radial äußeren Mantelflächen 10, 11 , 12 der Zylinderlauf buchsen 5, 6, 7 weisen , wie insbesondere in Fig. 2 gut erkennbar dargestellt ist, eine Raustruktur mit einer Tiefe zwischen 0,2 mm und 1 ,5 mm auf, die Hinterschneidungen aufweist. Im vorliegenden Ausführungsbeispiel beträgt die Tiefe der Raustruktur im Mittel 0,5 mm. Durch die Raustruktur der Mantelflächen 10, 11 , 12 wird eine form- und kraftschlüssige Verbindung zischen den Zylinderlaufbuchsen 5, 6, 7 und dem Umgussmantel 26 des Zylinderkurbelgehäuses 1 erreicht.The radially outer lateral surfaces 10, 11, 12 of the cylinder liners 5, 6, 7, as shown particularly clearly in Fig. 2, a Rau structure with a depth between 0.2 mm and 1, 5 mm, which has undercuts , In the present embodiment, the depth of the structure is on average 0.5 mm. Due to the rough structure of the lateral surfaces 10, 11, 12, a positive and non-positive connection between the cylinder liners 5, 6, 7 and the encapsulation jacket 26 of the cylinder crankcase 1 is achieved.
Der von den Zylinderlaufbuchsen 5, 6, 7 gebildete Laufbuchsenverbund 9 wird im Niederdruckgussverfahren oder im Schwerkraftgussverfahren hergestellt. Verwendet wird hierzu eine übereutektische Aluminium-Silizium-Legierung, die neben Aluminium 15 % bis 21 % Silizium, 1 % bis 5 % Magnesium und 2 % bis 5 % Kupfer enthält. Die Aluminium-Silizium-Legierung kann weiterhin 0,7 % bis 1 ,5 % Eisen und 0,3 % bis 0,7 % Mangan enthalten.The bushing composite 9 formed by the cylinder liners 5, 6, 7 is produced by low-pressure casting or by gravity casting. For this purpose, a hypereutectic aluminum-silicon alloy is used which, in addition to aluminum, contains 15% to 21% silicon, 1% to 5% magnesium and 2% to 5% copper. The aluminum-silicon alloy may further contain 0.7% to 1.5% iron and 0.3% to 0.7% manganese.
Zur besseren Kühlung der Zylinderlaufbuchsen 5, 6, 7 sind in die Stege 2, 3, 4 Kühlmitteldurchlässe 14, 15, 16 eingebracht.For better cooling of the cylinder liners 5, 6, 7 coolant passages 14, 15, 16 are in the webs 2, 3, 4 introduced.
Der Kühlmitteldurchlass 16 ist in Fig. 2 vergrößert dargestellt und besteht wie auch die übrigen Kühlmitteldurchlässe 14 und 15 aus einer in die zylinderkopfseitige Stirnseite 30 des Steges 4 eingebrachten, ersten Sacklochbohrung 27 mit einer Öffnung 31 in der zylinderkopfseitigen Stirnseite 30 des Steges 4 und aus einer von der zylinderbuchsenseitigen Begrenzungsfläche 28 der Ausnehmung 25 aus über den Umgussmantel 26 in den Steg 4 eingebrachten, zweiten Sacklochbohrung 29 mit einer Öffnung 32 im Umgussmantel 26, wobei die beiden Sacklochbohrungen 27 und 29 so ausgerichtet sind, dass die zweite Sacklochbohrung 29 in das untere Ende der ersten Sacklochbohrung 27 mündet. Im vorliegenden Ausführungsbeispiel weisen die Sacklochbohrungen 27 und 29 einen Durchmesser von 2,5 mm auf, wobei die Breite der Stege 2, 3, 4 jeweils 7 mm beträgt. - A -The coolant passage 16 is shown enlarged in FIG. 2 and consists, like the other coolant passages 14 and 15, of a first blind hole 27 introduced into the cylinder head side 30 of the web 4 with an opening 31 in the cylinder head side end 30 of the web 4 and out of one from the cylinder sleeve-side boundary surface 28 of the recess 25 from the overblown casing 26 in the web 4 introduced second blind hole 29 with an opening 32 in the encasing 26, wherein the two blind holes 27 and 29 are aligned so that the second blind hole 29 in the lower end the first blind hole 27 opens. In the present embodiment, the blind bores 27 and 29 have a diameter of 2.5 mm, wherein the width of the webs 2, 3, 4 is 7 mm in each case. - A -
Der Durchfluss des Kühlmittels, Wasser, durch den Kühlmitteldurchlass 16 findet (siehe Fig. 2) im vorliegenden Ausführungsbeispiel in Richtung der Pfeile 31 und 32 statt, da beim fertig montierten Verbrennungsmotor, wobei der in den Figuren nicht dargestellte Zylinderkopf auf dem Zylinderkurbelgehäuse 1 montiert ist, der Druck des in der Ausnehmung 25 befindlichen Kühlwassers ausreichend groß ist, um einen Teil des Kühlwassers durch die Sacklochbohrungen 29 und 27 zu treiben und damit den oberen Bereich des Steges 4 zu kühlen, der einer der thermisch am höchsten belasteten Teile eines Verbrennungsmotors ist.The flow of the coolant, water, through the coolant passage 16 takes place (see FIG. 2) in the present embodiment in the direction of the arrows 31 and 32, since in the assembled engine, the cylinder head, not shown in the figures, is mounted on the cylinder crankcase 1 in that the pressure of the cooling water located in the recess 25 is sufficiently great to drive a portion of the cooling water through the blind bores 29 and 27 and thus to cool the upper portion of the web 4, which is one of the thermally most heavily loaded parts of an internal combustion engine.
Fig. 3 zeigt eine Ausgestaltung des Zylinderkurbelgehäuses 1 , bei dem die in die Stege 2, 3, 4 eingeformten Kühlmitteldurchlässe 33 zwei Öffnungen 34, 35 aufweisen, die beide über den Umgussmantel 26 in die Ausnehmung 25 für den Wassermantel münden. Hergestellt werden können die Kühlmitteldurchlässe 14 , 15, 16 und 33 sowie die Sacklochbohrungen 27 und 29 durch Erodieren. 3 shows an embodiment of the cylinder crankcase 1, in which the coolant passages 33 formed in the webs 2, 3, 4 have two openings 34, 35, both of which open via the encasing jacket 26 into the recess 25 for the water jacket. The coolant passages 14, 15, 16 and 33 as well as the blind bores 27 and 29 can be produced by erosion.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Zylinderkurbelgehäuse1 cylinder crankcase
2,3,4 Steg2,3,4 footbridge
5,6,7 Zylinderlaufbuchse5,6,7 cylinder liner
9 Laufbuchsenverbund9 bushing composite
10,11, 12 Mantelflächen der Zylinderlaufbuchsen10,11, 12 lateral surfaces of the cylinder liners
14, 15, 16 Kühlmitteldurchlass14, 15, 16 coolant passage
17, 18, 19,20 Ölrücklaufkanal17, 18, 19,20 Oil return channel
21,22, 23,24 Verschraubungsbohrung21,22, 23,24 screw hole
25 Ausnehmung für einen Wassermantel25 recess for a water jacket
26 Umgussmantel26 encapsulation jacket
27 erste Sacklochbohrung27 first blind hole
28 Begrenzungsfläche28 boundary surface
29 zweite Sacklochbohrung29 second blind hole
30 Stirnseite des Steges 430 front side of the bridge 4
31,32 Öffnung des Kühlmitteldurchlasses 1631,32 opening of the coolant passage 16
33 Kühlmitteldurchlass33 coolant passage
34,35 Öffnungen des Kühlmitteldurchlasses 33 34.35 openings of the coolant passage 33rd

Claims

Patentansprüche claims
1. Zylinderkurbelgehäuse (1) für einen Verbrennungsmotor, das aus einer Aluminium-Silizium-Legierung besteht, und in das ein aus einem Stück bestehender Laufbuchsenverbund (9) im Druckgussverfahren eingegossen ist, der aus einer übereutektischen Aluminium-Silizium-Legierung besteht, und der mindestens zwei in einer Reihe angeordnete und über Stege (2, 3, 4) miteinander verbundene Zylinderlaufbuchsen (5, 6, 7) aufweist, wobei die teils von den radial äußeren Mantelflächen (10, 11 , 12) der Zylinderlaufbuchsen (5, 6, 7) und teils von den angrenzenden Flächen der Stege (2, 3, 4) gebildete Seitenfläche des Laufbuchsenverbundes (9) eine Raustruktur aufweist, dadurch gekennzeichnet, dass die Seitenfläche des Laufbuchsenverbundes (9) von einem vom Zylinderkurbelgehäuse (1) gebildeten Umgussmantel (26) umgeben ist, der zylinderbuchsenseitig eine in das Zylinderkurbelgehäuse (1 ) eingeformte Ausnehmung (25) für einen Wassermantel begrenzt, und dass in die Stege (2, 3, 4) jeweils mindestens ein Kühlmitteldurchlass (14, 15, 16, 33) mit Öffnungen (31 , 32, 34, 35) für das Ein- und Ausleiten des Kühlmittels eingebracht ist, wobei zumindest eine Öffnung (32, 34, 35) über den Umgussmantel (26) in die Ausnehmung (25) für den Wassermantel mündet .1. A cylinder crankcase (1) for an internal combustion engine, which consists of an aluminum-silicon alloy, and in which an integral bushing composite (9) is cast in the die-casting process, which consists of a hypereutectic aluminum-silicon alloy, and at least two cylinder liners (5, 6, 7) which are arranged in a row and have webs (2, 3, 4) connected to one another, the part of the radially outer shell surfaces (10, 11, 12) of the cylinder liners (5, 6, 7) and partly of the adjacent surfaces of the webs (2, 3, 4) formed side surface of the liner composite (9) has a structure, characterized in that the side surface of the liner composite (9) of a cylinder crankcase (1) formed Umgussmantel (26 ) is surrounded, the cylinder sleeve side one in the cylinder crankcase (1) molded recess (25) for a water jacket limited, and that in the webs (2, 3, 4) each m at least one coolant passage (14, 15, 16, 33) with openings (31, 32, 34, 35) is introduced for the introduction and discharge of the coolant, wherein at least one opening (32, 34, 35) via the Umgussmantel (26 ) opens into the recess (25) for the water jacket.
2. Zylinderkurbelgehäuse (1) nach Anspruch 1 , dadurch gekennzeichnet, dass der Kühlmitteldurchlass (33) zwei Öffnungen (34, 35) aufweist, die beide über den Umgussmantel (26) in die Ausnehmung (25) für den Wassermantel münden.2. Cylinder crankcase (1) according to claim 1, characterized in that the coolant passage (33) has two openings (34, 35), both of which open via the Umgussmantel (26) in the recess (25) for the water jacket.
3. Zylinderkurbelgehäuse (1) nach Anspruch 1 , dadurch gekennzeichnet, dass der Kühlmitteldurchlass (14, 15, 16) zwei Öffnungen (31 , 32) aufweist, von denen eine Öffnung (31) in die zylinderkopfseitige Stirnseite (30) des jeweiligen Steges (2, 3, A) und die andere Öffnung (32) über den Umgussmantel (26) in die Ausnehmung (25) für den Wassermantel mündet.3. Cylinder crankcase (1) according to claim 1, characterized in that the coolant passage (14, 15, 16) has two openings (31, 32), of which an opening (31) in the cylinder head end face (30) of the respective web ( 2, 3, A) and the other opening (32) via the Umgussmantel (26) opens into the recess (25) for the water jacket.
4. Zylinderkurbelgehäuse (1) nach Anspruch 3, dadurch gekennzeichnet, dass die Kühlmitteldurchlässe (14, 15, 16) jeweils aus einer in die zylinderkopfseiti- ge Stirnseite des jeweiligen Steges (2, 3, 4) eingebrachten, ersten Sacklochbohrung (27) und aus einer von der zylinderbuchsenseitigen Begrenzungsfläche (28) der Ausnehmung (25) für den Wassermantel aus über den Umguss- mantel (26) in den jeweiligen Steg (2, 3, 4) eingebrachten, zweiten Sacklochbohrung (29) bestehen, wobei die erste und die zweite Sacklochbohrung (27, 29) derart angeordnet sind, dass das Bohrungsende der ersten Sacklochbohrung (27) in das Bohrungsende der zweiten Sacklochbohrung (29) mündet.4. Cylinder crankcase (1) according to claim 3, characterized in that the coolant passages (14, 15, 16) each consist of a in the cylinderkopfseiti- ge front side of the respective web (2, 3, 4) introduced, the first blind hole (27) and from one of the cylinder sleeve side boundary surface (28) of the recess (25) for the water jacket on the Umguss- coat (26) in the respective web (2, 3, 4) introduced, second blind hole (29), wherein the first and the second blind hole (27, 29) are arranged such that the bore end of the first blind hole (27) in the bore end of the second blind hole (29) empties.
5. Zylinderkurbelgehäuse (1) nach Anspruch 4, dadurch gekennzeichnet, dass die Durchmesser der ersten und zweiten Sacklochbohrung (27, 29) 2 bis 4 mm und die Breite der Stege (2, 3, 4) 5 bis 8 mm betragen.5. Cylinder crankcase (1) according to claim 4, characterized in that the diameters of the first and second blind bore (27, 29) are 2 to 4 mm and the width of the webs (2, 3, 4) 5 to 8 mm.
6. Zylinderkurbelgehäuse (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kühlmitteldurchlässe (14, 15, 16, 33) durch Erodieren hergestellt sind.6. Cylinder crankcase (1) according to any one of the preceding claims, characterized in that the coolant passages (14, 15, 16, 33) are made by erosion.
7. Zylinderkurbelgehäuse (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Aluminium-Silizium-Legierung, aus der der Laufbuchsenverbund (9) besteht, 15 % bis 21 % Silizium, 1 % bis 5 % Magnesium, 2 % bis 5 % Kupfer und ansonsten Aluminium enthält.7. Cylinder crankcase (1) according to any one of the preceding claims, characterized in that the aluminum-silicon alloy of which the bushing composite (9), 15% to 21% silicon, 1% to 5% magnesium, 2% to 5 % Copper and otherwise contains aluminum.
8. Zylinderkurbelgehäuse (1) nach Anspruch 7, dadurch gekennzeichnet, dass die Aluminium-Silizium-Legierung zusätzlich 0,7 % bis 1 ,5 % Eisen und 0,3 % bis 0,7 % Mangan enthält.8. Cylinder crankcase (1) according to claim 7, characterized in that the aluminum-silicon alloy additionally contains 0.7% to 1, 5% iron and 0.3% to 0.7% manganese.
9. Zylinderkurbelgehäuse (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die radial äußeren Mantelflächen (10, 11 , 12) der Zylinderlaufbuchsen (5, 6, 7) eine Raustruktur mit einer Tiefe zwischen 0,2 mm und 1 ,5 mm und mit Hinterschneidungen aufweisen. 9. Cylinder crankcase (1) according to any one of the preceding claims, characterized in that the radially outer lateral surfaces (10, 11, 12) of the cylinder liners (5, 6, 7) a Rau structure with a depth between 0.2 mm and 1, the fifth mm and with undercuts.
EP08801216A 2007-08-29 2008-08-23 Cylinder crank case for an internal combustion engine Withdrawn EP2195520A1 (en)

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DE102007041010A DE102007041010A1 (en) 2007-08-29 2007-08-29 Cylinder crankcase for an internal combustion engine
PCT/DE2008/001393 WO2009026898A1 (en) 2007-08-29 2008-08-23 Cylinder crank case for an internal combustion engine

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KR (1) KR101477324B1 (en)
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DE102007041010A1 (en) 2009-03-05
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US20110030627A1 (en) 2011-02-10
WO2009026898A1 (en) 2009-03-05
KR20100047309A (en) 2010-05-07
KR101477324B1 (en) 2014-12-29
JP2010537115A (en) 2010-12-02
JP5096579B2 (en) 2012-12-12

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