EP0695866A1 - Cylinder block for an internal combustion engine with a water jacket made of aluminium - Google Patents
Cylinder block for an internal combustion engine with a water jacket made of aluminium Download PDFInfo
- Publication number
- EP0695866A1 EP0695866A1 EP95110978A EP95110978A EP0695866A1 EP 0695866 A1 EP0695866 A1 EP 0695866A1 EP 95110978 A EP95110978 A EP 95110978A EP 95110978 A EP95110978 A EP 95110978A EP 0695866 A1 EP0695866 A1 EP 0695866A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder block
- water jacket
- liner
- block according
- aluminum
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000004411 aluminium Substances 0.000 title abstract 2
- 238000002485 combustion reaction Methods 0.000 title description 2
- 229910001060 Gray iron Inorganic materials 0.000 claims abstract description 22
- 238000005266 casting Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 5
- 230000008901 benefit Effects 0.000 description 8
- 239000013585 weight reducing agent Substances 0.000 description 5
- 239000002826 coolant Substances 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910052902 vermiculite Inorganic materials 0.000 description 2
- 235000019354 vermiculite Nutrition 0.000 description 2
- 239000010455 vermiculite Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
-
- 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
- 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
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- 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
Definitions
- the invention relates to a cylinder block for a piston engine.
- a cylinder block made of gray cast iron which is structurally designed so that on the one hand there is a weight reduction, on the other hand a high structural strength is ensured, which is achieved in particular by the fact that between the two outer sides of the water jacket Two cylinders each have a reinforcing rib which is U-shaped in cross section and extends into the area of the crankshaft bearing mount, so that the forces which are effective between the cylinder head and the crankshaft bearing and can be absorbed by the cylinder block can be absorbed primarily via these reinforcing ribs, so that all other wall parts can be made noticeably thinner.
- the object of the invention is to further reduce the weight of a cylinder block made of gray cast iron of the type described above, without reducing the structural strength.
- a cylinder block for a piston engine with at least one cylinder, which has a base block formed from the liner, the crankshaft bearing mount and the motor base, which is made of gray cast iron in one piece and integrally with material and with a casing formed as a water jacket in the area of the liner Aluminum.
- the cylinder block according to the invention offers that Advantage that the parts loaded by the engine operation continue to be made of gray cast iron in the form of a basic block and that after the application of appropriate core parts this basic block is provided at least in the area of the liner with a water jacket made of cast aluminum in a second casting step. This has the advantage that the power flow between the cylinder head and the motor base continues to run entirely over the gray cast iron part.
- the liner and the associated crankshaft bearing mount as well as the motor base are made of gray cast iron in one piece.
- the reduction in weight compared to the known motor designs is achieved in that the parts forming the casing, first of all the water jacket, which only has to withstand the pressure of the cooling medium, can then also be produced with aluminum with wall thicknesses between 2 mm and 3 mm, whereby there is a significant weight reduction.
- the jacket can also extend over the area of the cylinder block which forms the housing wall for the crankcase in the area of the crankshaft bearing receptacle, so that the desired weight reduction is also achieved here.
- Another advantage of the cylinder block according to the invention is that for the liners very much for the friction behavior much cheaper gray cast iron material is available.
- the part of the casing forming the water jacket is of double-walled design in its water-carrying parts, the part forming the inner wall lying directly against the liner and the part forming the outer wall running at a distance therefrom.
- This configuration has the advantage that the pressurized cooling medium cannot penetrate into boundary areas between the aluminum casing and the gray cast iron base block, so that sealing problems are avoided from the outset.
- the pressurized cooling medium is limited only to the area of the inlets and outlets by self-contained walls made of cast aluminum.
- the base block at least in the transition area between the liner and the crankshaft bearing receptacle, is provided on its outside with at least one web-like elevation and / or groove-shaped depression running in the crank axis direction.
- This configuration offers the advantage that not only a form-fitting anchoring between the aluminum casing and the gray cast iron base block is created, but also a labyrinth-like seal is created, so that a passage of a liquid medium of the space delimited by this area is cooling water, be it oil, is avoided.
- the lower area of the base block is provided with a housing wall made of cast aluminum that forms the crankcase. It is expedient if this housing wall is integrally connected to the water jacket.
- a housing wall shielding the crankshafts from the outside is made of cast aluminum instead of gray cast iron, results in a further possibility for weight reduction, especially since the housing wall itself has no supporting functions. Since, for casting reasons, no smaller wall thickness can be produced from gray cast iron, the "material exchange" according to the invention results in a further significant reduction in weight.
- this housing wall is produced in the casting process, it is possible to provide corresponding ribs on the outside and / or inside, which stiffen the without significant weight increase Lead housing wall, so that vibration and / or droning phenomena are prevented. It is expedient if the housing wall extends into and engages around the motor foot. This results in a positive connection between the base of the gray cast iron motor base on the one hand and the casing made of aluminum on the other hand, so that any existing stresses resulting from the cooling process of the casting process do not lead to a lifting of the casing in this area.
- a vertical cross section through a cylinder block for a multi-cylinder in-line engine is shown. The cut is made transversely to the crankshaft axis.
- the cylinder block essentially consists of a base block 1 cast from gray cast iron, for example vermiculite (GGV), which has the liners 2 and the crankshaft bearing receptacles 3, which are designed in a web-like manner between two adjacent liners 2, in the material connection, ie also from gray cast iron, which have web-shaped supports 4 each run into the motor base 5.
- This base block 1 is provided with a casing 6 made of cast aluminum, which is on the base block 1 in a second casting process is poured on according to the arrangement of appropriate cores.
- the casing 6 is formed as a water jacket 7 in its area immediately surrounding the liner 2.
- the part of the casing 6 forming the water jacket 7 is double-walled, so that the inner wall 8 of the part of the casing delimiting the water-carrying cavity 9 lies directly against the outer surface of the liner 2, while the outer wall 10 delimits the cavity from the outside.
- the casing 6 continues as a housing wall 11, which closes off the lower region that defines the crankcase.
- the base block 1 is provided with a longitudinal arrangement 13 of rib-shaped webs and / or groove-shaped depressions, which form a positive connection between base block 1 and jacket 6 when the jacket 6 is poured on in this area.
- the housing wall 11 is guided around the motor foot into the sole area, so that the casing 6 is also connected in a form-fitting manner here.
- Fig. 2 shows a parallel to Fig. 1 performed vertical cross section through the cylinder block, which, like the horizontal section acc. Fig. 3 shows, is led through the area in which two liners adjoin each other.
- the elements already described in FIG. 1 are identified by the same reference symbols in FIG. 2, so that reference can be made to the description of FIG. 1.
- the narrow connection area of the base block between two immediately adjacent liners in the illustrated embodiment by two narrow, slit-shaped Opened transverse openings 14 and 15 which are associated with the upper region of the liner forming the cylinder.
- the aluminum material flows through the slot-shaped transverse openings 14, 15, so that the mutually facing inner walls 8 are integrally connected to one another in this area and thus also fixed to the base block 1.
- the further advantage of this arrangement is that, due to the better thermal conductivity of the aluminum material, a better heat dissipation into the water jacket 7 is effected from this area, which is adjacent to the combustion chamber of the cylinder formed by the liner 2, via the transverse webs made of aluminum.
- the cylinder head 16 which is only indicated schematically, is clamped directly to the base block 1 by means of clamping screws 17, which are only indicated here by their central axis.
- the sheath 6, as the section shows, has an interruption in this area, which is either already taken into account in the casting, as shown, or which is subsequently generated when the threaded holes 18 are drilled to receive the tensioning screws 17.
- transverse openings 14 and 15 The area of the transverse openings 14 and 15 is shown in FIG. 3 in the horizontal section identified by the line III-III in FIG. In Fig. 3, however, only the liner 2 and the water jacket 7 is shown fully in the drawing, while the remaining parts of the base block 3 are only indicated.
- Fig. 4 shows a vertical longitudinal section along the line IV-IV in Fig. 3 and also only through the area of the liners 2 with the associated water jacket 7. The course of the transverse webs formed by the transverse openings 14 and 15 in the upper region of the liner 2 can also be seen here.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Gears, Cams (AREA)
Abstract
Description
Die Erfindung betrifft einen Zylinderblock für einen Kolbenmotor.The invention relates to a cylinder block for a piston engine.
Bei Kolbenmotoren, insbesondere Kolbenmotoren für Personenkraftfahrzeuge, ist man bestrebt, das Gewicht weitestgehend zu reduzieren. Man war daher dazu übergegangen, die Zylinderblöcke aus Leichmetall herzustellen, was jedoch zur Folge hatte, daß zwei Materialien verwendet werden müssen, da die Laufbüchsen weiterhin aus entsprechenden Graugußqualitäten herzustellen waren.With piston engines, in particular piston engines for passenger vehicles, efforts are made to reduce the weight as much as possible. It was therefore started to manufacture the cylinder blocks from light metal, but with the result that two materials had to be used, since the liners were still to be made from appropriate gray cast iron qualities.
Aus DE-A-42 31 284 ist ein Zylinderblock aus Grauguß bekannt, der konstruktiv so gestaltet ist, daß einerseits eine Gewichtsreduzierung gegeben ist, andererseits eine hohe Gestaltfestigkeit gewährleistet wird, was insbesondere dadurch erreicht wird, daß jeweils auf den beiden Außenseiten des Wassermantels zwischen je zwei Zylindern eine im Querschnitt U-förmige Verstärkungsrippe vorhanden ist, die sich bis in den Bereich der Kurbelwellenlageraufnahme erstreckt, so daß die zwischen dem Zylinderkopf und der Kurbelwellenlagerung wirksamen und vom Zylinderblock aufzunehmenden Kräfte in erster Linie über diese Verstärkungsrippen aufgenommen werden können, so daß alle übrigen Wandteile spürbar dünner gestaltet werden können.From DE-A-42 31 284 a cylinder block made of gray cast iron is known, which is structurally designed so that on the one hand there is a weight reduction, on the other hand a high structural strength is ensured, which is achieved in particular by the fact that between the two outer sides of the water jacket Two cylinders each have a reinforcing rib which is U-shaped in cross section and extends into the area of the crankshaft bearing mount, so that the forces which are effective between the cylinder head and the crankshaft bearing and can be absorbed by the cylinder block can be absorbed primarily via these reinforcing ribs, so that all other wall parts can be made noticeably thinner.
Der Erfindung liegt nun die Aufgabe zugrunde, einen Zylinderblock aus Grauguß der vorstehend bezeichneten Art in seinem Gewicht weiter zu reduzieren, ohne daß hierbei die Gestaltfestigkeit vermindert wird.The object of the invention is to further reduce the weight of a cylinder block made of gray cast iron of the type described above, without reducing the structural strength.
Diese Aufgabe wird gelöst durch einen Zylinderblock für einen Kolbenmotor mit wenigstens einem Zylinder, der einen aus der Laufbüchse, der Kurbelwellenlageraufnahme und dem Motorfuß gebildeten Grundblock aufweist, der einstückig-stoffschlüssig aus Grauguß hergestellt ist und mit einer im Bereich der Laufbüchse als Wassermantel ausgebildeten Ummantelung aus Aluminium. Während bei einem Zylinderblock der vorstehend bezeichneten Art, der vollständig aus Grauguß hergestellt ist, beispielsweise aus Vermiculit, eine geringere Wandstärke als 4 mm aus gießtechnischen Gründen nicht möglich ist, somit also keine weitere Gewichtsminderung durch Verminderung der Wandstärken möglich ist, bietet der erfindungsgemäße Zylinderblock den Vorteil, daß die durch den Motorbetrieb belasteten Teile weiterhin aus Grauguß in Form eines Grundblocks hergestellt werden und daß anschließend nach dem Aufbringen entsprechender Kernteile dieser Grundblock zumindest im Bereich der Laufbüchse mit einer als Wassermantel ausgebildeten Ummantelung aus Aluminiumguß in einem zweiten Gießschritt versehen wird. Dies hat den Vorteil, daß der Kraftfluß zwischen Zylinderkopf und Motorfuß weiterhin in vollem Umfang über das Graugußteil verläuft. Die Laufbüchse und die zugehörigen Kurbelwellenlageraufnahme sowie der Motorfuß sind einstückig-stoffschlüssig aus Grauguß hergestellt. Die Gewichtsreduzierung gegenüber den vorbekannten Motorbauformen wird dadurch erreicht, daß die die Ummantelung bildenden Teile, in erster der Wassermantel, der nur dem Druck des Kühlmediums zu widerstehen hat, dann ebenfalls mit Wandstärken zwischen 2 mm und 3 mm aber aus Aluminium hergestellt werden kann, wodurch sich eine erhebliche Gewichtsreduzierung ergibt. Neben dem Wassermantel kann die Ummantelung sich auch über den Bereich des Zylinderblocks erstrecken, der im Bereich der Kurbelwellenlageraufnahme die Gehäusewandung für das Kurbelgehäuse bildet, so daß auch hier die gewünschte Gewichtsreduzierung erreicht wird. Ein weiterer Vorteil des erfindungsgemäßen Zylinderblocks besteht darin, daß für die Laufbüchsen der für das Reibungsverhalten sehr viel günstigere Grauguß-Werkstoff zur Verfügung steht.This object is achieved by a cylinder block for a piston engine with at least one cylinder, which has a base block formed from the liner, the crankshaft bearing mount and the motor base, which is made of gray cast iron in one piece and integrally with material and with a casing formed as a water jacket in the area of the liner Aluminum. While in a cylinder block of the type described above, which is made entirely of gray cast iron, for example made of vermiculite, a wall thickness less than 4 mm is not possible for casting reasons, and therefore no further weight reduction by reducing the wall thicknesses is possible, the cylinder block according to the invention offers that Advantage that the parts loaded by the engine operation continue to be made of gray cast iron in the form of a basic block and that after the application of appropriate core parts this basic block is provided at least in the area of the liner with a water jacket made of cast aluminum in a second casting step. This has the advantage that the power flow between the cylinder head and the motor base continues to run entirely over the gray cast iron part. The liner and the associated crankshaft bearing mount as well as the motor base are made of gray cast iron in one piece. The reduction in weight compared to the known motor designs is achieved in that the parts forming the casing, first of all the water jacket, which only has to withstand the pressure of the cooling medium, can then also be produced with aluminum with wall thicknesses between 2 mm and 3 mm, whereby there is a significant weight reduction. In addition to the water jacket, the jacket can also extend over the area of the cylinder block which forms the housing wall for the crankcase in the area of the crankshaft bearing receptacle, so that the desired weight reduction is also achieved here. Another advantage of the cylinder block according to the invention is that for the liners very much for the friction behavior much cheaper gray cast iron material is available.
Dadurch, daß die Ummantelung durch einen Gießvorgang mit dem aus Grauguß bestehenden Grundblock verbunden wird, ergibt sich bei entsprechender Temperaturführung beim Gießvorgang eine einwandfreie dichte Verbindung zwischen der Aluminium-Ummantelung einerseits und dem Grauguß-Grundblock andererseits.The fact that the casing is connected by a casting process to the base block made of gray cast iron, results in a proper tight connection between the aluminum jacket on the one hand and the gray cast iron base block on the other hand with appropriate temperature control during the casting process.
In einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, daß der den Wassermantel bildende Teil der Ummantelung in seinen wasserführenden Teilen doppelwandig ausgebildet ist, wobei der die Innenwandung bildende Teil unmittelbar an der Laufbüchse anliegt und der die Außenwand bildende Teil mit Abstand hierzu verläuft. Diese Ausgestaltung hat den Vorteil, daß das unter Druck stehende Kühlmedium nicht in Grenzbereiche zwischen der Aluminium-Ummantelung und dem Grauguß-Grundblock eindringen kann, so daß hier Abdichtungsprobleme von vorne herein vermieden sind. Das unter Druck stehende Kühlmedium wird ausschließlich bis in den Bereich der Zu- und Abläufe von in sich geschlossenen Wandungen aus Alumiumguß begrenzt.In a preferred embodiment of the invention it is provided that the part of the casing forming the water jacket is of double-walled design in its water-carrying parts, the part forming the inner wall lying directly against the liner and the part forming the outer wall running at a distance therefrom. This configuration has the advantage that the pressurized cooling medium cannot penetrate into boundary areas between the aluminum casing and the gray cast iron base block, so that sealing problems are avoided from the outset. The pressurized cooling medium is limited only to the area of the inlets and outlets by self-contained walls made of cast aluminum.
In weiterer vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, daß bei der Anordnung von wenigstens zwei Zylindern in dem Bereich, in dem die Zylinder aneinandergrenzen, im Graugußmaterial wenigstens eine Queröffnung angeordnet ist, die vom Aluminiummaterial des Wassermantels durchsetzt ist. Diese Ausgestaltung hat zum einen den Vorteil, daß auch zwischen den beiden Zylindern die am Grundblock anliegenden Wandungen des Wassermantels stoffschlüssig miteinander verbunden sind und damit eine innenliegende Verankerung dieses Teils der Ummantelung gebildet wird. Ein weiterer Vorteil dieser Ausgestaltung besteht darin, daß infolge der besseren Wärmeleitfähigkeit auch aus dem Bereich, in dem die beiden Zylinder bzw. Laufbüchsen unmittelbar aneinanderliegen, über das die Queröffnung durchsetztende Aluminiummaterials eine zusätzliche Wärmeabfuhr erfolgt und damit die Kühlwirkung in diesem ansonsten kaum kühlbaren Bereich verbessert wird. Zweckmäßig ist es hierbei, wenn die Queröffnung eine schlitzförmige Kontur aufweist.In a further advantageous embodiment of the invention it is provided that in the arrangement of at least two cylinders in the area in which the cylinders adjoin one another, at least one transverse opening is arranged in the gray cast iron material and the aluminum material of the water jacket penetrates it. On the one hand, this configuration has the advantage that the walls of the water jacket which are in contact with the base block are also integrally connected to one another between the two cylinders and thus an internal anchoring of this part of the casing is formed. Another advantage of this embodiment is that due to the better thermal conductivity also from the area in which the two cylinders or liners are directly adjacent to each other, an additional through the transverse opening aluminum material Heat is dissipated and the cooling effect is improved in this otherwise hardly coolable area. It is expedient here if the transverse opening has a slot-shaped contour.
In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß der Grundblock zumindest im Übergangsbereich zwischen Laufbüchse und Kurbelwellenlageraufnahme auf seiner Außenseite mit wenigstens einer in Kurbelachsrichtung verlaufenden stegförmigen Erhöhung und/oder nutförmigen Vertiefung versehen ist. Diese Ausgestaltung bietet den Vorteil, daß nicht nur eine formschlüssige Verankerung zwischen der Aluminium-Ummantelung und dem Grauguß-Grundblock geschaffen wird, sondern darüber hinaus entsteht hierdurch eine labyrinthartige Abdichtung, so daß ein Durchtritt eines flüssigen Mediums des jeweils durch diesen Bereich abgegrenzten Raums, sei es Kühlwasser, sei es Öl, vermieden wird.In a further embodiment of the invention it is provided that the base block, at least in the transition area between the liner and the crankshaft bearing receptacle, is provided on its outside with at least one web-like elevation and / or groove-shaped depression running in the crank axis direction. This configuration offers the advantage that not only a form-fitting anchoring between the aluminum casing and the gray cast iron base block is created, but also a labyrinth-like seal is created, so that a passage of a liquid medium of the space delimited by this area is cooling water, be it oil, is avoided.
In zweckmäßiger weiterer Ausgestaltung der Erfindung ist vorgesehen, daß vom Übergangsbereich zwischen Laufbüchse und Kurbelwellenlageraufnahme ausgehend, der untere Bereich des Grundblocks mit einer das Kurbelgehäuse bildenden Gehäusewandung aus Aluminiumguß versehen ist. Hierbei ist es zweckmäßig, wenn diese Gehäusewandung stoffschlüssig mit dem Wassermantel verbunden ist. Dadurch, daß eine die Kurbelwellen nach außen abschirmende Gehäusewandung anstelle von Grauguß aus Aluminiumguß hergestellt ist, ergibt sich eine weitere Möglichkeit für eine Gewichtsreduzierung, zumal die Gehäusewandung selbst keine tragenden Funktionen besitzt. Da aus gießtechnischen Gründen bei der Herstellung aus Grauguß keine geringere Wandstärke herstellbar ist, ergibt sich durch den erfindungsgemäßen "Materialaustausch" eine weitere deutliche Gewichtsverminderung. Dadurch, daß diese Gehäusewandung im Gießverfahren hergestellt wird, ist es möglich, auf der Außen- und/oder Innenseite entsprechende Rippen vorzusehen, die ohne nennenswerte Gewichtserhöhung zu einer Versteifung der Gehäusewandung führen, so daß hier Vibrations- und/oder Dröhnerscheinungen unterbunden sind. Zweckmäßig ist es, wenn die Gehäusewandung sich bis in den Motorfuß erstreckt und diesen umgreift. Hierdurch wird ein Formschluß zwischen dem zum Grundblock aus Grauguß gehörenden Motorfuß einerseits und der aus Aluminium bestehenden Ummantelung andererseits erreicht, so daß etwa vorhandene, aus dem Abkühlungsprozeß des Gießvorganges herrührende Restspannungen nicht zu einem Abheben der Ummantelung in diesem Bereich führen.In an expedient further embodiment of the invention, it is provided that starting from the transition area between the liner and the crankshaft bearing receptacle, the lower area of the base block is provided with a housing wall made of cast aluminum that forms the crankcase. It is expedient if this housing wall is integrally connected to the water jacket. The fact that a housing wall shielding the crankshafts from the outside is made of cast aluminum instead of gray cast iron, results in a further possibility for weight reduction, especially since the housing wall itself has no supporting functions. Since, for casting reasons, no smaller wall thickness can be produced from gray cast iron, the "material exchange" according to the invention results in a further significant reduction in weight. The fact that this housing wall is produced in the casting process, it is possible to provide corresponding ribs on the outside and / or inside, which stiffen the without significant weight increase Lead housing wall, so that vibration and / or droning phenomena are prevented. It is expedient if the housing wall extends into and engages around the motor foot. This results in a positive connection between the base of the gray cast iron motor base on the one hand and the casing made of aluminum on the other hand, so that any existing stresses resulting from the cooling process of the casting process do not lead to a lifting of the casing in this area.
Die Erfindung wird anhand schematischer Zeichnungen eines Ausführungsbeispieles näher erläutert. Es zeigen:
- Fig. 1
- einen vertikalen Querschnitt durch einen Zylinderblock im Bereich der Laufbüchse,
- Fig. 2
- einen vertikalen Querschnitt durch einen Zylinderblock um Bereich zweier aneinandergrenzender Laufbüchsen,
- Fig. 3
- einen Horizontalschnitt gem. der Linie III-III in Fig. 1,
- Fig. 4
- einen Vertikalschnitt gem. der Linie IV-IV in Fig. Fig. 3.
- Fig. 1
- a vertical cross section through a cylinder block in the area of the liner,
- Fig. 2
- a vertical cross section through a cylinder block around the area of two adjacent liners,
- Fig. 3
- a horizontal section acc. the line III-III in Fig. 1,
- Fig. 4
- a vertical section acc. the line IV-IV in FIG. 3.
In Fig. 1 ist ein vertikaler Querschnitt durch einen Zylinderblock für einen Mehrzylinder-Reihenmotor dargestellt. Der Schnitt ist quer zur Kurbelwellenachse geführt. Der Zylinderblock besteht im wesentlichen aus einem aus Grauguß, beispielsweise Vermiculit (GGV) gegossenen Grundblock 1, der im Stoffschluß, d. h. also ebenfalls aus Grauguß, die Laufbüchsen 2 sowie die jeweils zwischen zwei benachbarten Laufbüchsen 2 stegförmig ausgebildeten Kurbelwellenlageraufnahmen 3 aufweist, die über stegförmige Abstützungen 4 jeweils in den Motorfuß 5 auslaufen. Dieser Grundblock 1 ist mit einer Ummantelung 6 aus Aluminiumguß versehen, die auf den Grundblock 1 in einem zweiten Gießverfahren nach Anordnung entsprechender Kerne aufgegossen ist. Die Ummantelung 6 ist in ihrem die Laufbüchse 2 unmittelbar umschließenden Bereich als Wassermantel 7 ausgebildet. Bei dem dargestellten Ausführungsbeispiel ist der den Wassermantel 7 bildende Teil der Ummantelung 6 doppelwandig ausgebildet, so daß die Innenwandung 8 des den wasserführenden Hohlraum 9 begrenzenden Teils der Ummantelung unmittelbar an die Außenfläche der Laufbüchse 2 anliegt, während die Außenwandung 10 den Hohlraum nach außen abgrenzt.In Fig. 1, a vertical cross section through a cylinder block for a multi-cylinder in-line engine is shown. The cut is made transversely to the crankshaft axis. The cylinder block essentially consists of a
Am unteren Ende des Wassermantels 7 setzt sich die Ummantelung 6 als Gehäusewandung 11 fort, die den unteren, das Kurbelgehäuse definierenden Bereich nach außen abschließt.At the lower end of the
Im Übergangsbereich 12 zwischen dem Wassermantel 7 und der Gehäusewandung 11 ist der Grundblock 1 mit einer längslaufenden Anordnung 13 von rippenförmigen Stegen und/oder nutenförmigen Vertiefungen versehen, die beim Aufgießen der Ummantelung 6 in diesem Bereich eine formschlüssige Verbindung zwischen Grundblock 1 und Ummantelung 6 bilden. Um Bereich des Motorfußes ist die Gehäusewandung 11 um den Motorfuß herum bis in den Sohlenbereich geführt, so daß auch hier die Ummantelung 6 formschlüssig verbunden ist.In the
Fig. 2 zeigt einen parallel zu Fig. 1 geführten vertikalen Querschnitt durch den Zylinderblock, der, wie der Horizontalschnitt gem. Fig. 3 zeigt, durch den Bereich geführt ist, in dem zwei Laufbüchsen aneinandergrenzen. Die in Fig. 1 bereits beschriebenen Elemente sind mit den gleichen Bezugszeichen in Fig. 2 gekennzeichnet, so daß auf die Beschreibung zu Fig. 1 verwiesen werden kann.Fig. 2 shows a parallel to Fig. 1 performed vertical cross section through the cylinder block, which, like the horizontal section acc. Fig. 3 shows, is led through the area in which two liners adjoin each other. The elements already described in FIG. 1 are identified by the same reference symbols in FIG. 2, so that reference can be made to the description of FIG. 1.
Wie der Vertikalschnitt gem. Fig. 2 zeigt, ist der schmale Verbindungsbereich des Grundblocks zwischen zwei unmittelbar aneinandergrenzenden Laufbüchsen bei dem dargestellten Ausführungsbeispiel durch zwei schmale, schlitzförmige Queröffnungen 14 und 15 durchbrochen, die dem oberen Bereich der den Zylinder bildenden Laufbüchse zugeordnet sind. Beim Umgießen des Grundblockes 3 mit der Aluminium-Ummantelung 6 fließt hier der Aluminiumwerkstoff durch die schlitzförmigen Queröffnungen 14, 15 hindurch, so daß die einander zugekehrten Innenwandungen 8 in diesem Bereich stoffschlüssig miteinander verbunden und damit auch am Grundblock 1 festgelegt sind. Der weitere Vorteil dieser Anordnung besteht darin, daß über die so gebildeten Querstege aus Aluminium aus diesem Bereich, der dem Verbrennungsraum des von der Laufbüchse 2 gebildeten Zylinders benachbart ist, aufgrund der besseren Wärmeleitfähigkeit des Aluminiumwerkstoffs eine bessere Wärmeabfuhr in den Wassermantel 7 bewirkt wird.How the vertical section acc. Fig. 2 shows, the narrow connection area of the base block between two immediately adjacent liners in the illustrated embodiment by two narrow, slit-shaped Opened
Der nur schematisch angedeutete Zylinderkopf 16 ist über Spannschrauben 17, die hier nur durch ihre Mittelachse angedeutet sind, unmittelbar mit dem Grundblock 1 verspannt. Die Ummantelung 6 weist, wie der Schnitt zeigt, in diesem Bereich eine Unterbrechung auf, die entweder bereits beim Guß berücksichtigt ist, wie dargestellt, oder aber die nachträglich beim Bohren der Gewindebohrungen 18 zur Aufnahme der Spannschrauben 17 erzeugt wird.The
Der Bereich der Queröffnungen 14 und 15 ist in dem in Fig. 2 durch die Linie III-III gekennzeichneten Horizontalschnitt in Fig. 3 dargestellt. In Fig. 3 ist jedoch lediglich die Laufbüchse 2 sowie der Wassermantel 7 zeichnerisch vollständig dargestellt, während die restlichen Teile des Grundblocks 3 nur angedeutet sind.The area of the
Fig. 4 zeigt einen Vertikal-Längsschnitt entsprechend der Linie IV-IV in Fig. 3 und zwar ebenfalls nur durch den Bereich der Laufbüchsen 2 mit dem zugehörigen Wassermantel 7. Der Verlauf der durch die Queröffnungen 14 und 15 gebildeten Querstege im oberen Bereich der Laufbüchse 2 ist hier ebenfalls ersichtlich.Fig. 4 shows a vertical longitudinal section along the line IV-IV in Fig. 3 and also only through the area of the
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9412637U DE9412637U1 (en) | 1994-08-05 | 1994-08-05 | Cylinder block for an internal combustion engine with a water jacket made of aluminum |
| DE9412637U | 1994-08-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0695866A1 true EP0695866A1 (en) | 1996-02-07 |
| EP0695866B1 EP0695866B1 (en) | 1998-04-01 |
Family
ID=6912039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95110978A Expired - Lifetime EP0695866B1 (en) | 1994-08-05 | 1995-07-13 | Cylinder block for an internal combustion engine with a water jacket made of aluminium |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5562073A (en) |
| EP (1) | EP0695866B1 (en) |
| AT (1) | ATE164659T1 (en) |
| DE (2) | DE9412637U1 (en) |
| ES (1) | ES2117332T3 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2776022A1 (en) | 1998-03-11 | 1999-09-17 | Daimler Chrysler Ag | TWO-PART CYLINDER BLOCK FOR INTERNAL COMBUSTION ENGINE AND MANUFACTURING METHOD THEREOF |
| EP1039118A2 (en) | 1999-03-20 | 2000-09-27 | Honsel GmbH & Co. KG | Cylinder block for a piston engine |
| DE10339573A1 (en) * | 2003-08-28 | 2005-03-31 | Audi Ag | Combined cylinder block and upper part of crankcase is for internal combustion engine and has solid connecting pieces between cylinder bores at top and cooling channels extending all round bores lower down |
| US6883418B1 (en) | 1998-10-22 | 2005-04-26 | Peter Greiner | Carbon piston for an internal combustion engine |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9425716D0 (en) * | 1994-12-20 | 1995-02-22 | Rover Group | An internal combustion engine |
| JPH10122034A (en) * | 1996-10-16 | 1998-05-12 | Toyota Motor Corp | Cylinder block for internal combustion engine and manufacture thereof |
| JP2001164985A (en) * | 1999-09-28 | 2001-06-19 | Kubota Corp | Cylinder block of multi-cylinder engine and casting method for same |
| US6318330B1 (en) * | 2000-10-11 | 2001-11-20 | Dana Corporation | Dual phase graphite cylinder liner and method of making the same |
| DE20314367U1 (en) * | 2002-09-16 | 2004-03-11 | Perkins Engines Co. Ltd. | Engine block for IC engine has extensions each end of the cylinder block to accommodate larger cylinder bores plus water jacket extensions |
| JP4306461B2 (en) * | 2004-01-14 | 2009-08-05 | トヨタ自動車株式会社 | Cylinder block fastening structure and engine body provided with the same |
| JP4241627B2 (en) * | 2005-01-14 | 2009-03-18 | 富士重工業株式会社 | Cylinder liner and cylinder block |
| US7509936B2 (en) * | 2006-07-14 | 2009-03-31 | Engineered Propulsion Systems, Inc. | Engine with hybrid crankcase |
| DE102007041010A1 (en) * | 2007-08-29 | 2009-03-05 | Mahle International Gmbh | Cylinder crankcase for an internal combustion engine |
| EP2764223B1 (en) | 2011-10-05 | 2021-07-21 | Engineered Propulsion Systems, Inc. | Aero compression combustion drive assembly control system |
| FR3011883B1 (en) * | 2013-10-15 | 2018-08-31 | Renault S.A.S. | "MOTOR BLOCK OF MOTOR VEHICLE" |
| US9950449B2 (en) * | 2015-03-02 | 2018-04-24 | Ford Global Technologies, Llc | Process and tool for forming a vehicle component |
| EP3655635B1 (en) | 2017-07-21 | 2024-05-15 | General Atomics Aeronautical Systems, Inc. | Enhanced aero diesel engine |
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| EP0554575A1 (en) * | 1992-01-06 | 1993-08-11 | Honda Giken Kogyo Kabushiki Kaisha | Cylinder block |
| DE4306269A1 (en) * | 1993-03-01 | 1994-02-24 | Daimler Benz Ag | Divided housing for piston-engine - has wall enclosing coolant chamber and level with cylinder top end-faces and joined by internal flange to flange on cylinder-block |
| DE4231284A1 (en) | 1992-09-18 | 1994-03-24 | Bruehl Eisenwerk | Cylinder block for an internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56102366A (en) * | 1980-01-19 | 1981-08-15 | Mazda Motor Corp | Production of cylinder block for internal combustion engine |
| JPS5710438U (en) * | 1980-06-21 | 1982-01-20 | ||
| US4938183A (en) * | 1987-12-24 | 1990-07-03 | Ford Motor Company | Method of making and apparatus for monoblock engine construction |
| KR100223084B1 (en) * | 1993-09-14 | 1999-10-15 | 정몽규 | The structure of cylinder block with ladder frame |
-
1994
- 1994-08-05 DE DE9412637U patent/DE9412637U1/en not_active Expired - Lifetime
-
1995
- 1995-07-13 AT AT95110978T patent/ATE164659T1/en not_active IP Right Cessation
- 1995-07-13 EP EP95110978A patent/EP0695866B1/en not_active Expired - Lifetime
- 1995-07-13 DE DE59501756T patent/DE59501756D1/en not_active Expired - Fee Related
- 1995-07-13 ES ES95110978T patent/ES2117332T3/en not_active Expired - Lifetime
- 1995-07-31 US US08/509,341 patent/US5562073A/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2168632A (en) * | 1984-11-09 | 1986-06-25 | Honda Motor Co Ltd | Cylinder block blank manufacture |
| EP0184425A2 (en) * | 1984-12-03 | 1986-06-11 | Honda Giken Kogyo Kabushiki Kaisha | Closed-deck cylinder block for water-cooled internal combustion engine |
| EP0363844A2 (en) * | 1988-10-14 | 1990-04-18 | Isuzu Jidosha Kabushiki Kaisha | A cylinder liner unit for use in an internal combustion engine |
| EP0554575A1 (en) * | 1992-01-06 | 1993-08-11 | Honda Giken Kogyo Kabushiki Kaisha | Cylinder block |
| DE4231284A1 (en) | 1992-09-18 | 1994-03-24 | Bruehl Eisenwerk | Cylinder block for an internal combustion engine |
| DE4306269A1 (en) * | 1993-03-01 | 1994-02-24 | Daimler Benz Ag | Divided housing for piston-engine - has wall enclosing coolant chamber and level with cylinder top end-faces and joined by internal flange to flange on cylinder-block |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2776022A1 (en) | 1998-03-11 | 1999-09-17 | Daimler Chrysler Ag | TWO-PART CYLINDER BLOCK FOR INTERNAL COMBUSTION ENGINE AND MANUFACTURING METHOD THEREOF |
| US6192852B1 (en) | 1998-03-11 | 2001-02-27 | Daimlerchrysler Ag | Crankcase for an internal-combustion engine |
| US6883418B1 (en) | 1998-10-22 | 2005-04-26 | Peter Greiner | Carbon piston for an internal combustion engine |
| DE19848649C5 (en) * | 1998-10-22 | 2008-11-27 | Peter Greiner | Carbon piston for an internal combustion engine |
| EP1039118A2 (en) | 1999-03-20 | 2000-09-27 | Honsel GmbH & Co. KG | Cylinder block for a piston engine |
| DE19912692A1 (en) * | 1999-03-20 | 2000-09-28 | Honsel Ag | Cylinder block for a piston engine |
| DE19912692C2 (en) * | 1999-03-20 | 2000-12-28 | Honsel Ag | Cylinder block for a piston engine |
| EP1039118A3 (en) * | 1999-03-20 | 2001-07-18 | Honsel GmbH & Co. KG | Cylinder block for a piston engine |
| DE10339573A1 (en) * | 2003-08-28 | 2005-03-31 | Audi Ag | Combined cylinder block and upper part of crankcase is for internal combustion engine and has solid connecting pieces between cylinder bores at top and cooling channels extending all round bores lower down |
| DE10339573B4 (en) * | 2003-08-28 | 2006-07-27 | Audi Ag | cylinder housing |
Also Published As
| Publication number | Publication date |
|---|---|
| US5562073A (en) | 1996-10-08 |
| ES2117332T3 (en) | 1998-08-01 |
| DE59501756D1 (en) | 1998-05-07 |
| EP0695866B1 (en) | 1998-04-01 |
| DE9412637U1 (en) | 1995-11-30 |
| ATE164659T1 (en) | 1998-04-15 |
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