WO2010057810A1 - Crankcase - Google Patents
Crankcase Download PDFInfo
- Publication number
- WO2010057810A1 WO2010057810A1 PCT/EP2009/064955 EP2009064955W WO2010057810A1 WO 2010057810 A1 WO2010057810 A1 WO 2010057810A1 EP 2009064955 W EP2009064955 W EP 2009064955W WO 2010057810 A1 WO2010057810 A1 WO 2010057810A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crankcase
- cylinder liner
- salt core
- casting
- coolant
- Prior art date
Links
- 239000002826 coolant Substances 0.000 claims abstract description 38
- 150000003839 salts Chemical group 0.000 claims abstract description 28
- 238000005266 casting Methods 0.000 claims abstract description 20
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000004512 die casting Methods 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000007767 bonding agent Substances 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims description 2
- 229910001060 Gray iron Inorganic materials 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
-
- 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
- B22C9/105—Salt cores
-
- 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
- F02F1/102—Attachment of cylinders to crankcase
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/16—Cylinder liners of wet type
-
- 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 crankcase of an internal combustion engine, manufactured in a die-casting method, wherein in the crankcase, a cylinder liner is arranged, which is connected in a connecting region with the crankcase, wherein the crankcase has a coolant space for cooling the cylinder liner, and wherein the coolant space Pouring over a pressure-resistant and water-soluble salt core is formed.
- crankcase In motor vehicle increasingly higher demands are placed on the internal combustion engines.
- the engine should perform at the lowest possible weight as high as possible.
- the top surface of the crankcase In the so-called closed deck engines, the top surface of the crankcase is formed substantially closed and provided only with a few small passages for the cooling medium. This creates a crankcase, which is much stiffer in the upper part. Due to the higher rigidity, it is easier to realize the seal between the cylinder head and the crankcase, whereby higher combustion pressures are possible in the cylinder. Cylinder head and crankcase can be formed with separate coolant spaces. The cooling effect can be more efficiently distributed to the cylinder head and crankcase. This makes it possible to set a different temperature in the crankcase than in the cylinder head.
- the coolant space of the engine block which surrounds the cylinder liners is formed by a decomposable core of sand with a catalyst substance.
- a salt core for producing a cavity in an article produced by die-casting is known. Based on this prior art, it is an object of the invention to provide a crankcase of an internal combustion engine, wherein the crankcase in the region of the coolant space has the highest possible rigidity, wherein the coolant space has an optimal for the heat exchange of the cooling medium geometry and wherein the coolant space formed as free of leakage is.
- crankcase of an internal combustion engine produced in a die-casting method, wherein in the crankcase a Zylinderiaufbuchse is arranged, which is connected in a connecting portion with the crankcase, wherein the crankcase has a coolant space for cooling the Zylinderiillerbuchse, wherein the coolant space by casting a pressure-resistant and water-soluble Saizkernes is formed, and wherein the connecting portion of the crankcase with the Zylinderiaufbuchse is positively and / or cohesively formed.
- connection region of the crankcase with the Zylinderiaufbuchse before casting around the Zylinderiaufbuchse a coating is formed, which reacts with the metal to be encapsulated and / or is effective as a primer.
- the coolant space is formed completely surrounded by the casting material of the crankcase.
- a stress-free transition possible between cylinder liner and crankcase is achieved in that the profile of the coolant chamber the transition points between the crankcase and cylinder liner optimized flow, in particular without dead spaces is formed for the flow.
- the flow of the coolant through the coolant space for the heat exchange can be optimized. This is achieved by arranging a distributor structure in the coolant space. This is also achieved in that the distributor structure is designed as a parallel to the cylinder liner extending deflecting plate.
- FIG. 2 shows an enlarged detail of the crankcase of FIG. 1,
- FIG. 3 shows a further section through the crankcase of FIG. 1,
- Figure 4 shows a further section through the crankcase of Figure 1 and
- FIG. 1 shows a section of a crankcase 1 with a cylinder liner 2 is shown schematically.
- the crankcase 1 has immediately adjacent to the cylinder liner 2 a coolant chamber 3.
- the coolant chamber 3 is produced by casting over a pressure-resistant and water-soluble salt core.
- FIG. 1 shows how the salt core is arranged directly adjacent to the incoming cylinder liner 2.
- the cylinder liner 2 with the melt of the crankcase 1 in a connection region. 4 cast around.
- the cylinder liner 2 is made, for example, from a cast iron alloy or a hypereutectic silicon-aluminum alloy, ie an aluminum alloy which, depending on the content of the further alloying elements, contains at least 12% by weight of Si.
- the crankcase 1 may be made of a light metal alloy.
- the outside of the cylinder liner 2 is pretreated before casting.
- the pretreatment may be a coating with a metal or a metal alloy, which reacts with the metal to be encapsulated and / or acts as a bonding agent.
- the coating will partially diffuse in the metal of the cylinder liner 2 and partly in the metal of the crankcase 1. To enlarge the surface and thus the adhesion in the connection area 4, can on the outside of the
- Cylinder liner 2 a kind of labyrinth structure can be formed.
- the oxide skin which is located on the surface of the aluminum parts, can be dissolved with a reacting with the melt of the crankcase 1 Beizung.
- FIG 2 it is shown how the transition point in the connecting area 4 between the crankcase 1 and the Zyl ⁇ ndermaschinese 2 can be formed as large as possible and as possible not kerb carti.
- the salt core has a rounded shape, such that a flow-favorable profile as possible for the flow of the cooling medium through the coolant space 3 is created.
- the salt core is not directly, but arranged with an intermediate layer 5 on the outside of the cylinder liner.
- the intermediate layer 5 causes the coolant chamber 3 after casting completely surrounded by the material of the crankcase 1 is formed.
- the coolant space 3 can be optimally dimensioned is formed leak-free to the cylinder liner 2 and the cylinder liner 2 itself is optimally integrated in the engine block.
- the intermediate layer 5 is formed from a material which, similar to the so-called "lost foam” method, dissolves or melts during casting over with the aluminum melt.
- the intermediate layer 5 can also be made from a material having an open-pored structure, for example aluminum foam The open-pore intermediate layer 5 is infiltrated during casting from the melt.
- annular reinforcing structure 6 is shown within the coolant chamber 3 before the Umgiessen.
- the reinforcing structure 6 is formed as an annular bent part, which is arranged parallel to and spaced from the cylinder liner 2.
- the sheet metal part 6 is used before encapsulation to reinforce the salt core and remains after dissolving the salt core as a deflection or distribution structure 7 in the coolant chamber 3 back.
- the reinforcing structure 6 can be completely enclosed by the salt core or emerge at favorable points out of the salt core in order to better position the salt core in the casting mold.
- the reinforcing structure 6 remains after the casting process and after flushing the salt core as a distributor structure 7 in theharimitteiraum 3 back and serves for better control of the coolant flow through the coolant cavities 3.
- the heat exchange and the cooling effect of the crankcase 1 and the cylinder liner 2 is improved ,
- FIG. 5 shows in a further variant how the salt core can be reinforced.
- a mat 8 made of a fibrous material is shown in the salt core.
- the fibers of the mat 8 may be short or long. If the fibers are relatively short, they are flushed out with the salt after the casting process and can be reused as well as the salt itself. In this case, the fibers mainly serve to reinforce and increase the pressure resistance of the salt core.
- the mat serves First, to increase the pressure resistance of the salt core and second, to optimize the heat exchange in the coolant chamber. 3
- the strength of the crankcase 1 in the region of the coolant chamber 3 is improved.
- the salt core can be pressure resistant, which is important for use in the die casting process. By modifying the salt core, the flow and the heat exchange in theissermitteiraum 3 can be improved.
- the crankcase 1 has in the region of the cylinder liner 2 and the
- Coolant chamber 3 has a higher rigidity and the combustion pressure in the cylinder can be significantly increased.
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)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a crankcase of an internal combustion engine, wherein the crankcase is produced in a diecasting process, wherein a cylinder liner is arranged in the crankcase, wherein the crankcase comprises a coolant chamber separated from the coolant circuit of the cylinder head, wherein the coolant chamber is formed by casting around a pressure-resistant and water-soluble salt core, and wherein the connection area of the crankcase to the cylinder liner is designed force-closed and/or bonded.
Description
Kurbelgehäuse crankcase
Die Erfindung bezieht sich auf ein Kurbelgehäuse einer Brennkraftmaschine, hergestellt in einem Druckgussverfahren, wobei in dem Kurbelgehäuse eine Zylinderlaufbuchse angeordnet ist, die in einem Verbindungsbereich mit dem Kurbelgehäuse verbunden ist, wobei das Kurbelgehäuse einen Kühlmittelraum zum Kühlen der Zylinderlaufbuchse aufweist, und wobei der Kühlmittelraum durch Umgiessen eines druckbeständigen und wasserlöslichen Salzkernes ausgebildet wird.The invention relates to a crankcase of an internal combustion engine, manufactured in a die-casting method, wherein in the crankcase, a cylinder liner is arranged, which is connected in a connecting region with the crankcase, wherein the crankcase has a coolant space for cooling the cylinder liner, and wherein the coolant space Pouring over a pressure-resistant and water-soluble salt core is formed.
Im Kraftfahrzeugbau werden an die Brennkraftmaschinen zunehmend höhere Anforderungen gestellt. Der Motor soll bei einem möglichst niedrigen Gewicht möglichst hohe Leistungen erbringen. Bei den so genannten closed deck Motoren wird die Deckfläche des Kurbelgehäuses im Wesentlichen geschlossen ausgebildet und nur mit wenigen kleinen Durchtrittsöffnungen für das Kühlmedium versehen. Hierdurch entsteht ein Kurbelgehäuse, das im oberen Teil wesentlich steifer ausgebildet ist. Durch die höhere Steifigkeit wird es einfacher möglich die Abdichtung zwischen Zylinderkopf und Kurbelgehäuse zu realisieren, wodurch im Zylinder höhere Verbrennungsdrücke möglich werden. Zylinderkopf und Kurbelgehäuse können mit getrennten Kühlmittelräumen ausgebildet werden. Die Kühlwirkung kann effizienter auf Zylinderkopf und Kurbelgehäuse verteilt werden. Dadurch wird es möglich im Kurbelgehäuse eine andere Temperatur als im Zylinderkopf einzustellen.In motor vehicle increasingly higher demands are placed on the internal combustion engines. The engine should perform at the lowest possible weight as high as possible. In the so-called closed deck engines, the top surface of the crankcase is formed substantially closed and provided only with a few small passages for the cooling medium. This creates a crankcase, which is much stiffer in the upper part. Due to the higher rigidity, it is easier to realize the seal between the cylinder head and the crankcase, whereby higher combustion pressures are possible in the cylinder. Cylinder head and crankcase can be formed with separate coolant spaces. The cooling effect can be more efficiently distributed to the cylinder head and crankcase. This makes it possible to set a different temperature in the crankcase than in the cylinder head.
Aus der EP 465 947 B1 ist ein Giessverfahren und eine Giessvorrichtung für Motorblöcke bekannt. Der Kühlmittelraum des Motorblockes, die die Zylinderlaufbuchsen umgibt, wird gebildet durch einen zersetzbaren Kern aus Sand mit einer Katalysatorsubstanz.From EP 465 947 B1 a casting method and a casting device for engine blocks is known. The coolant space of the engine block which surrounds the cylinder liners is formed by a decomposable core of sand with a catalyst substance.
Aus der DE 10 2004 006 600 A1 ist ein Salzkern zur Erzeugung eines Hohlraumes in einem durch Druckgussverfahren hergestellten Gegenstand bekannt.
Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, ein Kurbelgehäuse einer Brennkraftmaschine anzugeben, wobei das Kurbelgehäuse im Bereich des Kühlmittelraumes eine möglichst hohe Steifigkeit aufweist, wobei der Kühlmittelraum eine für den Wärmeaustausch des Kühlmediums optimale Geometrie aufweist und wobei der Kühlmittelraum möglichst leckagefrei ausgebildet ist.From DE 10 2004 006 600 A1, a salt core for producing a cavity in an article produced by die-casting is known. Based on this prior art, it is an object of the invention to provide a crankcase of an internal combustion engine, wherein the crankcase in the region of the coolant space has the highest possible rigidity, wherein the coolant space has an optimal for the heat exchange of the cooling medium geometry and wherein the coolant space formed as free of leakage is.
Diese Aufgabe wird gelöst durch ein Kurbelgehäuse einer Brennkraftmaschine, hergestellt in einem Druckgussverfahren, wobei in dem Kurbelgehäuse eine Zylinderiaufbuchse angeordnet ist, die in einem Verbindungsbereich mit dem Kurbelgehäuse verbunden ist, wobei das Kurbelgehäuse einen Kühlmittelraum zum Kühlen der Zylinderiaufbuchse aufweist, wobei der Kühlmittelraum durch Umgiessen eines druckbeständigen und wasserlöslichen Saizkernes ausgebildet wird, und wobei der Verbindungsbereich des Kurbelgehäuses mit der Zylinderiaufbuchse kraft- und/oder stoffschlüssig ausgebildet ist.This object is achieved by a crankcase of an internal combustion engine, produced in a die-casting method, wherein in the crankcase a Zylinderiaufbuchse is arranged, which is connected in a connecting portion with the crankcase, wherein the crankcase has a coolant space for cooling the Zylinderiaufbuchse, wherein the coolant space by casting a pressure-resistant and water-soluble Saizkernes is formed, and wherein the connecting portion of the crankcase with the Zylinderiaufbuchse is positively and / or cohesively formed.
Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.Preferred developments of the invention will become apparent from the dependent claims.
Es ist von Vorteil, dass beim Umgiessen der Zylinderiaufbuchse mit der Schmelze des Kurbelgehäuses einen möglichst nahtlosen, d.h. leckagefreien Verbindungsbereich hergestellt wird. Dies wird dadurch erreicht, dass im Verbindungsbereich des Kurbelgehäuses mit der Zylinderiaufbuchse vor dem Umgiessen an die Zylinderiaufbuchse eine Beschichtung ausgebildet ist, die mit dem zu umgiessenden Metall reagiert und/oder als Haftvermittler wirksam ist. Dies wird auch dadurch erreicht, dass der Kühlmittelraum vollständig vom Gusswerkstoff des Kurbelgehäuses umgeben ausgebildet ist.It is advantageous that when molding the Zylinderiaufbuchse with the melt of the crankcase as seamless as possible, i. leak-free connection area is produced. This is achieved in that in the connection region of the crankcase with the Zylinderiaufbuchse before casting around the Zylinderiaufbuchse a coating is formed, which reacts with the metal to be encapsulated and / or is effective as a primer. This is also achieved in that the coolant space is formed completely surrounded by the casting material of the crankcase.
Einen möglichst spannungsarmen Übergang zwischen Zylinderlaufbuchse und Kurbelgehäuse wird dadurch erreicht, dass das Profil des Kühlmittelraumes an
den Übergangsstellen zwischen Kurbelgehäuse und Zylinderlaufbuchse strömungsoptimiert, insbesondere ohne Toträumen für die Strömung ausgebildet ist.A stress-free transition possible between cylinder liner and crankcase is achieved in that the profile of the coolant chamber the transition points between the crankcase and cylinder liner optimized flow, in particular without dead spaces is formed for the flow.
Es ist weiter auch von Vorteil, dass die Strömung des Kühlmittels durch den Kühlmittelraum für den Wärmeaustausch optimiert werden kann. Dies wird dadurch erreicht, dass im Kühlmittelraum eine Verteilerstruktur angeordnet ist. Dies wird auch dadurch erreicht, dass die Verteilerstruktur als ein parallel zur Zylinderlaufbuchse verlaufend angeordnetes Umlenkblech ausgebildet ist.It is also advantageous that the flow of the coolant through the coolant space for the heat exchange can be optimized. This is achieved by arranging a distributor structure in the coolant space. This is also achieved in that the distributor structure is designed as a parallel to the cylinder liner extending deflecting plate.
Ausführungsbeispiele der Erfindung werden anhand der Figuren beschrieben. Es zeigen:Embodiments of the invention will be described with reference to the figures. Show it:
Figur 1 einen Schnitt durch ein erfindungsgemässes Kurbelgehäuse ,1 shows a section through an inventive crankcase,
Figur 2 einen vergrösserten Ausschnitt aus dem Kurbelgehäuse der Figur 1 ,FIG. 2 shows an enlarged detail of the crankcase of FIG. 1,
Figur 3 einen weiteren Schnitt durch das Kurbelgehäuse der Figur 1 ,FIG. 3 shows a further section through the crankcase of FIG. 1,
Figur 4 einen weiteren Schnitt durch das Kurbelgehäuse der Figur 1 undFigure 4 shows a further section through the crankcase of Figure 1 and
Figur 5 einen weiteren Schnitt durch das Kurbelgehäuse der Figur 1.5 shows a further section through the crankcase of Figure 1.
In Figur 1 ist schematisch einen Ausschnitt aus einem Kurbelgehäuse 1 mit einer Zylinderlaufbuchse 2 dargestellt. Das Kurbelgehäuse 1 weist unmittelbar benachbart zur Zylinderlaufbuchse 2 einen Kühlmittelraum 3 auf. Der Kühlmittelraum 3 wird durch Umgiessen eines druckbeständigen und wasserlöslichen Salzkernes hergestellt. In Figur 1 ist ersichtlich, wie der Salzkern unmittelbar angrenzend an die einzugiessende Zylinderlaufbuchse 2 angeordnet ist. An den Stellen, wo kein Salzkern vorhanden ist, wird die Zylinderlaufbuchse 2 mit der Schmelze des Kurbelgehäuses 1 in einem Verbindungsbereich 4
umgössen. Die Zylinderlaufbuchse 2 ist beispielsweise aus einer Graugusslegierung oder einer übereutektischen Silizium-Aluminiumlegierung, d.h. eine Aluminiumlegierung, die, je nach dem der Gehalt der weiteren Legierungselementen, mindestens 12 Gew.% Si enthält, hergestellt. Das Kurbelgehäuse 1 kann aus einer Leichtmetalllegierung hergestellt sein.1 shows a section of a crankcase 1 with a cylinder liner 2 is shown schematically. The crankcase 1 has immediately adjacent to the cylinder liner 2 a coolant chamber 3. The coolant chamber 3 is produced by casting over a pressure-resistant and water-soluble salt core. FIG. 1 shows how the salt core is arranged directly adjacent to the incoming cylinder liner 2. At the locations where no salt core is present, the cylinder liner 2 with the melt of the crankcase 1 in a connection region. 4 cast around. The cylinder liner 2 is made, for example, from a cast iron alloy or a hypereutectic silicon-aluminum alloy, ie an aluminum alloy which, depending on the content of the further alloying elements, contains at least 12% by weight of Si. The crankcase 1 may be made of a light metal alloy.
Um in den Verbindungsbereich 4 eine stoffschlüssige und somit dauerhaft leckagefreie Verbindung zwischen Zylinderlaufbuchse 2 und Kurbelgehäuse 1 herzustellen, wird die Aussenseite der Zylinderlaufbuchse 2 vor dem Umgiessen vorbehandelt. Die Vorbehandlung kann eine Beschichtung mit einem Metall oder einer Metalllegierung sein, die mit dem zu umgiessenden Metall reagiert und/oder als Haftvermittler wirksam ist. Beim Umgiessen wird die Beschichtung teilweise in dem Metall der Zylinderlaufbuchse 2 und teilweise in dem Metall des Kurbelgehäuses 1 diffundieren. Um die Oberfläche und somit die Haftwirkung im Verbindungsbereich 4 zu vergrössern, kann an der Aussenseite derIn order to produce in the connection region 4 a cohesive and thus permanently leak-free connection between the cylinder liner 2 and the crankcase 1, the outside of the cylinder liner 2 is pretreated before casting. The pretreatment may be a coating with a metal or a metal alloy, which reacts with the metal to be encapsulated and / or acts as a bonding agent. During casting, the coating will partially diffuse in the metal of the cylinder liner 2 and partly in the metal of the crankcase 1. To enlarge the surface and thus the adhesion in the connection area 4, can on the outside of the
Zylinderlaufbuchse 2 eine Art Labyrinthstruktur ausgebildet werden. Die Oxidhaut, die sich an der Oberfläche der Aluminiumteile befindet, kann mit einer mit der Schmelze des Kurbelgehäuses 1 reagierenden Beizung aufgelöst werden.Cylinder liner 2 a kind of labyrinth structure can be formed. The oxide skin, which is located on the surface of the aluminum parts, can be dissolved with a reacting with the melt of the crankcase 1 Beizung.
In Figur 2 ist dargestellt, wie die Übergangsstelle Im Verbind ungsbereich 4 zwischen dem Kurbelgehäuse 1 und der Zylϊnderlaufbuchse 2 möglichst grossflächig und möglichst kerbfrei ausgebildet werden kann. Der Salzkern weist eine abgerundete Form auf, derart, dass ein möglichst strömungsgünstiges Profil für die Strömung des Kühlmediums durch den Kühlmittelraum 3 geschaffen wird.In Figure 2 it is shown how the transition point in the connecting area 4 between the crankcase 1 and the Zylϊnderlaufbuchse 2 can be formed as large as possible and as possible not kerbfrei. The salt core has a rounded shape, such that a flow-favorable profile as possible for the flow of the cooling medium through the coolant space 3 is created.
In Figur 3 ist der Salzkern nicht unmittelbar, sondern mit einer Zwischenschicht 5 auf der Aussenseite der Zylinderlaufbuchse angeordnet. Die Zwischenschicht 5 bewirkt, dass der Kühlmittelraum 3 nach dem Umgiessen vollständig vom Material des Kurbelgehäuses 1 umgeben ausgebildet ist. Hierdurch wird die Fläche, die als Verbindungsbereich 4 zwischen Zylinderlaufbuchse 2 und Kurbelgehäuse 1 dient, wesentlich vergrössert. Der Kühlmittelraum 3 kann optimal dimensioniert werden,
ist zur Zylinderlaufbuchse 2 hin leckagefrei ausgebildet und die Zylinderlaufbuchse 2 selbst ist optimal im Motorblock eingebunden. Die Zwischenschicht 5 ist aus einem Werkstoff ausgebildet, der sich, ähnlich wie beim so genannten „lost foam" Verfahren, beim Umgiessen mit der Aluminiumschmelze auflöst oder einschmilzt, Die Zwischenschicht 5 kann auch aus einem Werkstoff mit einer offenporigen Struktur, beispielsweise Aluminiumschaum, hergestellt sein. Die offenporige Zwischenschicht 5 wird beim Umgiessen von der Schmelze infiltriert.In Figure 3, the salt core is not directly, but arranged with an intermediate layer 5 on the outside of the cylinder liner. The intermediate layer 5 causes the coolant chamber 3 after casting completely surrounded by the material of the crankcase 1 is formed. As a result, the surface, which serves as a connection region 4 between the cylinder liner 2 and the crankcase 1, substantially increased. The coolant space 3 can be optimally dimensioned is formed leak-free to the cylinder liner 2 and the cylinder liner 2 itself is optimally integrated in the engine block. The intermediate layer 5 is formed from a material which, similar to the so-called "lost foam" method, dissolves or melts during casting over with the aluminum melt. The intermediate layer 5 can also be made from a material having an open-pored structure, for example aluminum foam The open-pore intermediate layer 5 is infiltrated during casting from the melt.
in Figur 4 ist innerhalb des Kühlmittelraumes 3 vor dem Umgiessen eine ringförmige Verstärkungsstruktur 6 dargestellt. Die Verstärkungsstruktur 6 ist als ein ringförmiges Biechteil ausgebildet, das parallel und beabstandet zur Zylinderlaufbuchse 2 angeordnet ist. Das Blechteil 6 dient vor dem Umgiessen zur Verstärkung des Salzkernes und verbleibt nach dem Auflösen des Salzkernes als Umlenk- oder Verteilerstruktur 7 in dem Kühlmittelraum 3 zurück. Die Verstärkungsstruktur 6 kann vollständig vom Salzkern umschlossen sein oder an günstigen Stellen aus dem Salzkern heraustreten um den Salzkern in der Giessform besser positionieren zu können. Die Verstärkungsstruktur 6 verbleibt nach dem Giessvorgang und nach dem Ausspülen des Salzkernes als Verteilerstruktur 7 in dem Kühlmitteiraum 3 zurück und dient zur besseren Steuerung des Kühlmittelflusses durch den Kühlmittel räum 3. Hiermit wird der Wärmeaustausch bzw. die Kühlwirkung des Kurbelgehäuses 1 und der Zylinderlaufbuchse 2 verbessert.in Figure 4, an annular reinforcing structure 6 is shown within the coolant chamber 3 before the Umgiessen. The reinforcing structure 6 is formed as an annular bent part, which is arranged parallel to and spaced from the cylinder liner 2. The sheet metal part 6 is used before encapsulation to reinforce the salt core and remains after dissolving the salt core as a deflection or distribution structure 7 in the coolant chamber 3 back. The reinforcing structure 6 can be completely enclosed by the salt core or emerge at favorable points out of the salt core in order to better position the salt core in the casting mold. The reinforcing structure 6 remains after the casting process and after flushing the salt core as a distributor structure 7 in the Kühlmitteiraum 3 back and serves for better control of the coolant flow through the coolant cavities 3. Hereby, the heat exchange and the cooling effect of the crankcase 1 and the cylinder liner 2 is improved ,
In Figur 5 ist in einer weiteren Variante dargestellt, wie der Salzkern verstärkt werden kann. Als Verstärkungsstruktur 6 ist im Salzkern eine Matte 8 aus einem faserigen Material dargestellt. Die Fasern der Matte 8 können kurz oder lang ausgebildet sein. Wenn die Fasern relativ kurz sind, werden sie nach dem Giessvorgang mit dem Salz ausgespült und können ebenso wie das Salz selbst wieder verwendet werden. In diesem Fall dienen die Fasern vor allem zur Verstärkung und zur Erhöhung der Druckbeständigkeϊt des Salzkernes. Wenn die Fasern relativ lang und zu einer Matte 8 zusammengesetzt sind, dient die Matte
erstens zur Erhöhung der Druckbeständigkeit des Salzkernes und zweitens zur Optimierung des Wärmeaustausches in den Kühlmittelraum 3.FIG. 5 shows in a further variant how the salt core can be reinforced. As reinforcing structure 6, a mat 8 made of a fibrous material is shown in the salt core. The fibers of the mat 8 may be short or long. If the fibers are relatively short, they are flushed out with the salt after the casting process and can be reused as well as the salt itself. In this case, the fibers mainly serve to reinforce and increase the pressure resistance of the salt core. When the fibers are relatively long and assembled into a mat 8, the mat serves First, to increase the pressure resistance of the salt core and second, to optimize the heat exchange in the coolant chamber. 3
Mit der hier beschriebenen Ausbildung des Kühlmittelraumes 3 mittels Salzkeme mit Verstärkungs- und/oder Verteilerstrukturen 6, 7, 8 wird die Festigkeit des Kurbelgehäuses 1 im Bereich des Kühlmittelraumes 3 verbessert. Der Salzkern kann druckbeständig ausgeführt werden, was für die Verwendung im Druckgussverfahren wichtig ist. Durch die Modifikation des Salzkernes kann die Strömung und der Wärmeaustausch im Kühlmitteiraum 3 verbessert werden. Das Kurbelgehäuse 1 weist im Bereich der Zylinderlaufbuchse 2 und desWith the embodiment of the coolant chamber 3 described here by means of a salt core with reinforcing and / or distributor structures 6, 7, 8, the strength of the crankcase 1 in the region of the coolant chamber 3 is improved. The salt core can be pressure resistant, which is important for use in the die casting process. By modifying the salt core, the flow and the heat exchange in the Kühlmitteiraum 3 can be improved. The crankcase 1 has in the region of the cylinder liner 2 and the
Kühlmittelraumes 3 eine höhere Steifigkeit auf und der Verbrennungsdruck im Zylinder kann wesentlich erhöht werden.
Coolant chamber 3 has a higher rigidity and the combustion pressure in the cylinder can be significantly increased.
Claims
1. Kurbelgehäuse (1) einer Brennkraftmaschine, hergestellt in einem Druckgussverfahren, wobei in dem Kurbelgehäuse (1) eine Zylinderlauf buchse (2) angeordnet ist, die in einem Verbindungsbereich (4) mit dem Kurbelgehäuse (1) verbunden ist, wobei das Kurbelgehäuse (1) einen Kühlmittelraum (3) zum Kühlen der Zylinderlaufbuchse (2) aufweist, und wobei der Kühlmittelraum (3) durch Umgiessen eines druckbeständigen und wasserlöslichen Salzkernes ausgebildet wird, dadurch gekennzeichnet, dass der Verbindungsbereich (4) des Kurbelgehäuses (1) mit der Zylinderlaufbuchse (2) kraft- und stoffschlüssig ausgebildet ist.1. crankcase (1) of an internal combustion engine, produced in a die-casting method, wherein in the crankcase (1) a cylinder liner (2) is arranged, which in a connecting region (4) with the crankcase (1) is connected, wherein the crankcase ( 1) has a coolant chamber (3) for cooling the cylinder liner (2), and wherein the coolant chamber (3) is formed by casting a pressure-resistant and water-soluble salt core, characterized in that the connecting region (4) of the crankcase (1) with the cylinder liner (2) is formed kraft- and cohesive.
2. Kurbelgehäuse nach dem Anspruch 1, dadurch gekennzeichnet, dass die Zylinderlaufbuchse (2) vor dem Umgiessen im Verbindungsbereich (4) des Kurbelgehäuses (1) mit der Zylinderlaufbuchse (2) mit einer Beschichtung ausgebildet ist, die mit dem zu umgiessenden Metall reagiert und/oder als Haftvermittler wirksam ist.2. Crankcase according to claim 1, characterized in that the cylinder liner (2) before casting in the connecting region (4) of the crankcase (1) with the cylinder liner (2) is formed with a coating which reacts with the metal to be encapsulated and / or acting as a bonding agent.
3. Kurbelgehäuse nach mindestens einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das Profil des Kühlmittelraumes (3) an den3. crankcase according to at least one of claims 1 or 2, characterized in that the profile of the coolant chamber (3) to the
Übergangsstellen zwischen Kurbelgehäuse und Zylinderlaufbuchse (2) ström ungsoptimiert, insbesondere ohne Toträumen für die Strömung ausgebildet ist.Transition points between the crankcase and cylinder liner (2) optimized for flow, in particular formed without dead spaces for the flow.
4. Kurbelgehäuse nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Kühlmittelraum (3) vollständig vom Gusswerkstoff des Kurbelgehäuses (1) umgeben ausgebildet ist. 4. Crankcase according to at least one of claims 1 to 3, characterized in that the coolant space (3) is formed completely surrounded by the casting material of the crankcase (1).
5. Kurbelgehäuse nach mindestens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zwischen dem Salzkern und der Zylinderlaufbuchse (2) vor dem Umgiessen eine Zwischenschicht (5) angeordnet ist, die sich beim dessen des Kurbeigehäuses (1) in der Schmelze auflöst, oder von der Schmelze infiltriert wird.5. crankcase according to at least one of claims 1 to 4, characterized in that between the salt core and the cylinder liner (2) prior to the casting an intermediate layer (5) is arranged, which dissolves in the case of the Kurbeigehäuses (1) in the melt, or infiltrated by the melt.
6. Kurbelgehäuse nach mindestens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass im Kühlmittelraum (3) eine Verteilerstruktur (7) zur Verteilung der Strömung des Kühlmitteis angeordnet ist.6. Crankcase according to at least one of claims 1 to 5, characterized in that in the coolant space (3) a distributor structure (7) for distributing the flow of Kühlmitteis is arranged.
7. Kurbelgehäuse nach mindestens einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Verteilerstruktur (7) als ein parallel zur Zyiinderlaufbuchse (2) verlaufend angeordnetes Umlenkblech (7) ausgebildet ist.7. crankcase according to at least one of claims 1 to 6, characterized in that the distributor structure (7) as a parallel to the Zyiinderlaufbuchse (2) extending deflecting plate (7) is formed.
8. Kurbeigehäuse nach mindestens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Zylinderiaufbuchse (2) aus Grauguss ausgebildet ist.8. Kurbeigehäuse according to at least one of claims 1 to 7, characterized in that the Zylinderiaufbuchse (2) is formed of gray cast iron.
9. Kurbelgehäuse nach mindestens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Zylinderlaufbuchse (2) aus einer übereutektischen Silizium-Aluminiumlegierung ausgebildet ist.9. crankcase according to at least one of claims 1 to 7, characterized in that the cylinder liner (2) is formed of a hypereutectic silicon-aluminum alloy.
10. Kurbelgehäuse nach mindestens einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Kurbelgehäuse (1) aus einer Aluminiumlegierung ausgebildet ist.10. Crankcase according to at least one of claims 1 to 9, characterized in that the crankcase (1) is formed from an aluminum alloy.
11. Kurbelgehäuse nach mindestens einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass in dem Salzkern vor dem Umgiessen eine Verstärkungsstruktur (8) angeordnet ist. 11. crankcase according to at least one of claims 1 to 10, characterized in that in the salt core prior to encapsulation, a reinforcing structure (8) is arranged.
12. Kurbelgehäuse nach mindestens einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass der Salzkern an den Übergangsstellen zwischen Kurbelgehäuse (1) und Zylinderlaufbuchse (2) benachbart zum Verbindungsbereich (4) vor dem Umgiessen beabstandet von der Zylinderlaufbuchse (2) angeordnet ist.12. A crankcase according to at least one of claims 1 to 11, characterized in that the salt core at the transition points between the crankcase (1) and cylinder liner (2) adjacent to the connecting region (4) before casting spaced from the cylinder liner (2) is arranged.
13. Kurbelgehäuse nach mindestens einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass in dem Salzkern vor dem Umgiessen eine Verteilerstruktur (7) und/oder eine Verstärkungsstruktur (8) angeordnet ist. 13. crankcase according to at least one of claims 1 to 12, characterized in that in the salt core prior to the Umgiessen a distributor structure (7) and / or a reinforcing structure (8) is arranged.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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EP08105811A EP2186582A1 (en) | 2008-11-18 | 2008-11-18 | Crankcase |
EP08105811.7 | 2008-11-18 |
Publications (1)
Publication Number | Publication Date |
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WO2010057810A1 true WO2010057810A1 (en) | 2010-05-27 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2009/064955 WO2010057810A1 (en) | 2008-11-18 | 2009-11-11 | Crankcase |
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EP (1) | EP2186582A1 (en) |
WO (1) | WO2010057810A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013015395A1 (en) * | 2013-09-17 | 2015-03-19 | Daimler Ag | Cast component with at least one porous metal body formed by a casting core |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5572847B2 (en) | 2010-03-17 | 2014-08-20 | 株式会社Moresco | Cylinder liner and manufacturing method thereof |
DE102010051356B4 (en) | 2010-11-13 | 2019-02-21 | Volkswagen Ag | Method for producing an insert for the creation of a cavity in a cast component and insert |
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US4446906A (en) * | 1980-11-13 | 1984-05-08 | Ford Motor Company | Method of making a cast aluminum based engine block |
EP0465947A1 (en) * | 1990-06-28 | 1992-01-15 | Ube Industries, Ltd. | Method and apparatus for casting engine block |
US5921312A (en) * | 1996-07-01 | 1999-07-13 | Alyn Corporation | Soluble core for casting |
EP1688517A1 (en) * | 2005-02-03 | 2006-08-09 | Ford-Werke GmbH | Process of manufacturing a metallic adhesive layer on a cast piece |
US20070009669A1 (en) * | 2005-07-08 | 2007-01-11 | Noritaka Miyamoto | Insert casting component, cylinder block, method for forming coating on insert casting component, and method for manufacturing cylinder block |
DE102005061196B3 (en) * | 2005-12-21 | 2007-01-11 | Daimlerchrysler Ag | Lost core casting method for producing castings with cast-in functional components, includes bonding the component to the core and protecting component with repellent material before applying facing |
DE102007014146A1 (en) * | 2007-03-23 | 2007-11-22 | Daimlerchrysler Ag | Die casting tool for manufacturing of cylinder crankcase, has salt core has wreath partially supported on ends of cylinder sleeve and core has vertically extending openings below cylinder head side end of cylinder sleeve |
WO2008138508A1 (en) * | 2007-05-16 | 2008-11-20 | Daimler Ag | Method for producing a cylinder crankcase |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004006600B4 (en) | 2004-02-11 | 2006-03-23 | Ks Aluminium-Technologie Ag | Removable metal casting core and method of making a core |
-
2008
- 2008-11-18 EP EP08105811A patent/EP2186582A1/en not_active Withdrawn
-
2009
- 2009-11-11 WO PCT/EP2009/064955 patent/WO2010057810A1/en active Application Filing
Patent Citations (8)
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US4446906A (en) * | 1980-11-13 | 1984-05-08 | Ford Motor Company | Method of making a cast aluminum based engine block |
EP0465947A1 (en) * | 1990-06-28 | 1992-01-15 | Ube Industries, Ltd. | Method and apparatus for casting engine block |
US5921312A (en) * | 1996-07-01 | 1999-07-13 | Alyn Corporation | Soluble core for casting |
EP1688517A1 (en) * | 2005-02-03 | 2006-08-09 | Ford-Werke GmbH | Process of manufacturing a metallic adhesive layer on a cast piece |
US20070009669A1 (en) * | 2005-07-08 | 2007-01-11 | Noritaka Miyamoto | Insert casting component, cylinder block, method for forming coating on insert casting component, and method for manufacturing cylinder block |
DE102005061196B3 (en) * | 2005-12-21 | 2007-01-11 | Daimlerchrysler Ag | Lost core casting method for producing castings with cast-in functional components, includes bonding the component to the core and protecting component with repellent material before applying facing |
DE102007014146A1 (en) * | 2007-03-23 | 2007-11-22 | Daimlerchrysler Ag | Die casting tool for manufacturing of cylinder crankcase, has salt core has wreath partially supported on ends of cylinder sleeve and core has vertically extending openings below cylinder head side end of cylinder sleeve |
WO2008138508A1 (en) * | 2007-05-16 | 2008-11-20 | Daimler Ag | Method for producing a cylinder crankcase |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102013015395A1 (en) * | 2013-09-17 | 2015-03-19 | Daimler Ag | Cast component with at least one porous metal body formed by a casting core |
US10300524B2 (en) | 2013-09-17 | 2019-05-28 | Daimler Ag | Casting component having at least one porous metal body formed by a casting core |
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EP2186582A1 (en) | 2010-05-19 |
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