EP0784150B1 - Cylinder block of a multi-cylinder internal combustion engine - Google Patents

Cylinder block of a multi-cylinder internal combustion engine Download PDF

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Publication number
EP0784150B1
EP0784150B1 EP96118314A EP96118314A EP0784150B1 EP 0784150 B1 EP0784150 B1 EP 0784150B1 EP 96118314 A EP96118314 A EP 96118314A EP 96118314 A EP96118314 A EP 96118314A EP 0784150 B1 EP0784150 B1 EP 0784150B1
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EP
European Patent Office
Prior art keywords
cylinder
cooling jacket
radiator tank
cooling water
cylinder crankcase
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Expired - Lifetime
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EP96118314A
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German (de)
French (fr)
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EP0784150A1 (en
Inventor
Frank Berger
Kurt Moll
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Daimler Benz AG
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DaimlerChrysler AG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/08—Arrangements of lubricant coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four

Definitions

  • the invention relates to a cylinder crankcase Multi-cylinder internal combustion engine according to the preamble of the claim 1.
  • Cylinders are formed by cylinder walls that are made up of one at least partially around an outer circumference of the cylinder walls extending cooling water jacket are surrounded.
  • the cooling water jacket is through at least one cooling water jacket wall and the cylinder walls educated.
  • a lubricating oil circuit includes one on the side Oil cooler arranged on the cylinder crankcase. Laterally on Cylinder crankcase is molded into a water tank in the the oil cooler is integrated and the openings to the cooling water jacket Has. The openings are used for fluid communication of cooling water jacket and water tank.
  • a section of the cooling water jacket wall at the same time forms a limitation on the cylinder side of the water box.
  • the document JP 05 321667 A shows only a single opening the cooling water heated by an oil cooler from a water tank emerge towards the cylinder essentially in the transverse direction of the engine can, so that the hot cooling water also an undesirable local temperature increase of the flow Cylinder. Due to the provision between the cylinders Partitions is the formation of a pronounced water flow not possible in the longitudinal direction of the engine.
  • DE 40 29 408 A1 is a cylinder crankcase Multi-cylinder internal combustion engine known, the cylinder walls of the cylinder crankcase from one in the longitudinal direction of the cylinder crankcase extending cooling water jacket are surrounded and the cooling water jacket by one of the Cylinder walls spaced cooling water jacket wall is formed. Furthermore, it is located on the side of the cylinder crankcase an oil cooler of a lubrication circuit of the internal combustion engine, wherein the oil cooler in a flange-mounted on the cylinder crankcase Oil cooler housing is arranged.
  • the invention has for its object a generic To design the cylinder crankcase to be as compact as possible, wherein at the same time the best possible integration of the oil cooler surrounding water jacket in the cooling water circuit of the Internal combustion engine is reachable.
  • the compact Structure of the cylinder crankcase by an essentially rectified flow guidance of two cooling water flows one constant inflow and flow around the individual cylinders can be effected without serious temperature differences.
  • Coolant jacket By running essentially along the entire cylinder height Coolant jacket is the integration of the oil cooler surrounding water jacket in the cooling water circuit of the internal combustion engine further improved by the flow around the cylinder this area is almost undisturbed and therefore fully functional is held.
  • the cooling water jacket wall for the fluid connection of Cooling water jacket wall and water tank can depend on the dimensioning of the oil cooler and the water tank and the resulting flow cross sections an influence of the cooling water flow in the area of the water box Section of the cooling water jacket wall can be made.
  • An advantage of the formation of cooling water channels in the cross-engine direction between adjacent cylinder walls lies in the further improved cooling effect because of the arrangement of the cylinders arises between adjacent cylinder walls through the poorer heat dissipation a heat accumulation that leads to undesirable temperature peaks in the adjacent cylinder walls.
  • Cooling water channels will be a more uniform cooling and thus achieve a more uniform thermal expansion of the individual cylinders.
  • the embodiment of the invention according to claim 2 represents a preferred one construction of the cylinder crankcase. Through the screw pipes formed on the cooling water jacket walls becomes a simple and inexpensive in series producible screw connection of the cylinder head realized.
  • An advantage of the embodiment of the invention according to claim 6 is that by the one-piece total water core, which the volumes of water tank filled with cooling water, cooling water jacket and cooling water channels in the manufacture of the cylinder head (usually made of die-cast aluminum) Total water core can be represented by a single, one-piece casting core is, for example, in the croning form mask process is easy and inexpensive to manufacture in large quantities.
  • Fig. 1 shows a cylinder crankcase 1 of a not shown multi-cylinder internal combustion engine
  • the cylinders 2-5 are formed by cylinder walls 2'-5 ', which are around one the outer periphery extending cooling water jacket 7 surround are by at least one cooling water jacket wall 10 and Cylinder walls 2'-5 'is formed.
  • an oil cooler 8 is arranged, which is in a laterally on Cylinder crankcase 1 molded water tank 9 integrated is.
  • the oil cooler 8 is part of a principle known, not Lubricating oil circuit of the internal combustion engine shown in more detail.
  • the through the outer circumference of the cylinder walls 2'-5 'and the Cooling water jacket wall 10 formed cooling water jacket 7 is in Direction of the cylinder transverse axes 2a-5a spaced from the cylinder walls 2'-5 'and runs along the vertical axes 2b-5b of the cylinders 2-5 and in the engine longitudinal direction.
  • a Section 22 of the cooling water jacket wall 10 simultaneously a cylinder side Limitation of the water tank 9, the cooling water jacket 7 in said section 22 essentially continuously runs.
  • Openings 23 for fluid connection of the cooling water jacket 7 and water box 9 arranged.
  • cooling water channels 24, 25 and 26 are arranged in the transverse direction of the engine, the opposite and running in the longitudinal direction of the engine Sections 27, 28 of the cooling water jacket 7 in terms of flow connect.
  • stiffeners in the form of screw pipes 29 for screw connection of a cylinder head, not shown molded (see Fig. 2 and 3).
  • a special feature of the cylinder crankcase 1 according to the invention lies in the fact that it is produced using the aluminum die-casting process the volumes of cooling water filled with Cooling water jacket 7, the water tank 9 and the cooling water channels 24-26 can be represented by a uniform total water core are, for example in the croning form mask process as one piece Casting core can be produced.
  • a water pump forcibly generates one Circulation of the cooling water in the cooling water circuit, the Cooling water conveyed by the water pump on an end face 30 of the cylinder crankcase 1 via an associated with the water tank 9 first inlet opening 31 and the cooling water jacket 7 assigned second inlet opening 32 in the cylinder crankcase 1 occurs.
  • the main directions of flow are Cooling water flow in the cooling water jacket 7 and in the water tank 9 essentially rectified.
  • the oil cooler 8 is attached to a cover 33 of the water tank 9 (see Fig. 2), the connections for feeding the to cooling and to drain the cooled lubricating oil on the lid 33 are arranged.
  • the cover 33 is with screws in threaded holes, the sprues 38 formed on the water tank 9 are introduced, attached.
  • the oil cooler 8 is with the lid 33 connected to a unit and mountable with it removable.
  • the cooling water flow through the cooling water jacket 7 and the water tank 9 is in Fig. 1, starting from the two end faces Inlet openings 31 and 32, indicated by arrows W.
  • the cooling water flows both in the water box 9 and in the water jacket 7 essentially in the direction of the longitudinal axis 6 of the cylinder crankcase 1, along the openings 23 in the cooling water jacket wall 10 a certain mixing of the two currents takes place.
  • the flow guidance shown serves primarily the better clarification of the cooling water flow through the cylinder crankcase 1. Furthermore, by an appropriate Dimensioning of the cross sections of the cooling water in one desired direction at specified points of the cooling water jacket to be led past.
  • FIG. 2 shows a section II - II of FIG. 1. Same Components of Fig. 1 are identified by the same reference numerals. Below the cylinder 2 is a bearing block 34 Crankshaft bearing 35 arranged a crankshaft, not shown. The bearing 16 is on the right above the bearing chair 34 the camshaft, not shown, bearing 16 and Crankshaft bearing 35 via a dashed-line pressure oil line 39 are supplied with lubricating oil.
  • the screw whistle 29 is below the passage opening 27a to see the screw connection for the cylinder head.
  • the screw whistle 29 causes only a slight one Cross-sectional reduction of the cooling water jacket 7, however the rigidity of the cooling water jacket wall 10 is significantly increased.
  • the section 28 of the cooling water jacket 7 of the cylinder crankcase 1 also runs parallel to the longitudinal axis 6 of the cylinder crankcase 1 and in the direction of the vertical axis 2b of the cylinder 2.
  • the height of the section 28 is somewhat lower because of the camshaft bearing 16.
  • a section III - III of Fig. 1 is shown, wherein here the oil cooler 8 is not shown. Same components 1 and 2 are identified by the same reference numerals.
  • On the side of the cylinder crankcase facing the cylinder head 1 are the screw pipes 29 for the screw connection of the cylinder head arranged.
  • the cooling water channel 24, of the two sections 27 and 28 of the cooling water jacket 7 connects in terms of flow, has in addition to the openings 23 for Water box 9 (see Fig. 1) also via a below the Screw pipe 29 arranged opening 34 a flow connection with the water box 9.
  • the cooling water channel has between the two screw pipes 29 24 a curved contour on its geodetically upper side 35, being below this contour, approximately in the middle of the Cooling water channel 24, a support pin 36 is arranged, which two adjacent cylinder walls 2 'and 3' (see Fig. 1) against each other supports.
  • the support pin 36 is on the cylinder crankcase 1 cast on.

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

Description

Die Erfindung bezieht sich auf ein Zylinderkurbelgehäuse einer mehrzylindrigen Brennkraftmaschine gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a cylinder crankcase Multi-cylinder internal combustion engine according to the preamble of the claim 1.

Aus der gattungsbildenden DE 11 93 310 ist ein Zylinderkurbelgehäuse einer mehrzylindrigen Brennkraftmaschine bekannt, deren Zylinder durch Zylinderwände gebildet sind, die von einem sich mindestens teilweise um einem äußeren Umkreis der Zylinderwände erstreckenden Kühlwassermantel umgeben sind. Der Kühlwassermantel ist durch mindestens eine Kühlwassermantelwand und den Zylinderwänden gebildet. Ein Schmierölkreislauf umfaßt einen seitlich am Zylinderkurbelgehäuse angeordneten Ölkühler. Seitlich am Zylinderkurbelgehäuse ist ein Wasserkasten angegossen, in den der Ölkühler integriert ist und der Öffnungen zum Kühlwassermantel hat. Die Öffnungen dienen zur strömungsmäßigen Verbindung von Kühlwassermantel und Wasserkasten. Ein Abschnitt der Kühlwassermantelwand bildet gleichzeitig eine zylinderseitige Begrenzung des Wasserkastens. Über zwei Öffnungen wird das vom Ölkühler erhitzte Kühlwasser in Richtung der Laufbüchsen der Zylinder, also in Motorquerrichtung, abgegeben. Ein Ausströmen des heißen Kühlwassers in Motorquerrichtung zu den Zylindern hin, hat aber lokale Temperaturerhöhungen bzw. einen Wärmestau zur Folge.From the generic DE 11 93 310 is a cylinder crankcase a multi-cylinder internal combustion engine known Cylinders are formed by cylinder walls that are made up of one at least partially around an outer circumference of the cylinder walls extending cooling water jacket are surrounded. The cooling water jacket is through at least one cooling water jacket wall and the cylinder walls educated. A lubricating oil circuit includes one on the side Oil cooler arranged on the cylinder crankcase. Laterally on Cylinder crankcase is molded into a water tank in the the oil cooler is integrated and the openings to the cooling water jacket Has. The openings are used for fluid communication of cooling water jacket and water tank. A section of the cooling water jacket wall at the same time forms a limitation on the cylinder side of the water box. This is from the oil cooler via two openings heated cooling water towards the cylinder liners, thus in the transverse direction of the engine. An outflow of the hot cooling water in the transverse direction of the engine towards the cylinders, but has local temperature increases or heat build-up Episode.

Die Schrift JP 05 321667 A zeigt nur eine einzelne Öffnung, aus der von einem Ölkühler erhitztes Kühlwasser aus einem Wasserkasten zum Zylinder hin im wesentlichen in Motorquerrichtung austreten kann, so daß sich durch das heiße Kühlwasser ebenfalls eine unerwünschte lokale Temperaturerhöhung des angeströmten Zylinders einstellt. Aufgrund zwischen den Zylindern vorgesehener Trennwände ist die Ausbildung einer ausgeprägten Wasserströmung in Motorlängsrichtung nicht möglich.The document JP 05 321667 A shows only a single opening the cooling water heated by an oil cooler from a water tank emerge towards the cylinder essentially in the transverse direction of the engine can, so that the hot cooling water also an undesirable local temperature increase of the flow Cylinder. Due to the provision between the cylinders Partitions is the formation of a pronounced water flow not possible in the longitudinal direction of the engine.

Ferner ist aus der DE 40 29 408 A1 ein Zylinderkurbelgehäuse einer mehrzylindrigen Brennkraftmaschine bekannt, wobei die Zylinderwände des Zylinderkurbelgehäuses von einem sich in Längsrichtung des Zylinderkurbelgehäuses erstreckenden Kühlwassermantel umgeben sind und wobei der Kühlwassermantel durch eine von den Zylinderwänden beabstandete Kühlwassermantelwand gebildet ist. Desweiteren befindet sich seitlich an dem Zylinderkurbelgehäuse ein Ölkühler eines Schmierkreislaufs der Brennkraftmaschine, wobei der Ölkühler in einem an das Zylinderkurbelgehäuse angeflanschten Ölkühlergehäuse angeordnet ist.Furthermore, from DE 40 29 408 A1 is a cylinder crankcase Multi-cylinder internal combustion engine known, the cylinder walls of the cylinder crankcase from one in the longitudinal direction of the cylinder crankcase extending cooling water jacket are surrounded and the cooling water jacket by one of the Cylinder walls spaced cooling water jacket wall is formed. Furthermore, it is located on the side of the cylinder crankcase an oil cooler of a lubrication circuit of the internal combustion engine, wherein the oil cooler in a flange-mounted on the cylinder crankcase Oil cooler housing is arranged.

Zum allgemeinen technischen Hintergrund wird noch auf die Druckschriften DE 44 00 952 C1 verwiesen.The general technical background is still on the publications DE 44 00 952 C1 referenced.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Zylinderkurbelgehäuse baulich möglichst kompakt auszubilden, wobei gleichzeitig eine möglichst gute Integration des den Ölkühler umgebenden Wassermantels in den Kühlwasserkreislauf der Brennkraftmaschine erreichbar ist. Dabei soll neben dem kompakten Aufbau des Zylinderkurbelgehäuses durch eine im wesentlichen gleichgerichtete Strömungsführung zweier Kühlwasserströme eine möglichst gleichbleibende An- und Umströmung der einzelnen Zylinder ohne gravierende Temperaturunterschiede bewirkt werden.The invention has for its object a generic To design the cylinder crankcase to be as compact as possible, wherein at the same time the best possible integration of the oil cooler surrounding water jacket in the cooling water circuit of the Internal combustion engine is reachable. In addition to the compact Structure of the cylinder crankcase by an essentially rectified flow guidance of two cooling water flows one constant inflow and flow around the individual cylinders can be effected without serious temperature differences.

Die Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruches 1 gegebenen Merkmale gelöst.The object is achieved by the in the characteristic of Patent claim 1 given features solved.

Ein Vorteil des Zylinderkurbelgehäuses liegt darin, daß dieses durch den seitlich angegossenen Wasserkasten sehr kompakt baut. Gleichzeitig wird eine gute Integration des den Ölkühler umgebenden Wassermantels in den Kühlwasserkreislauf der Brennkraftmaschine erreicht.An advantage of the cylinder crankcase is that this very compact due to the water tank cast on the side. At the same time, a good integration of the oil cooler surrounding water jacket in the cooling water circuit of the internal combustion engine reached.

Durch den im wesentlichen entlang der gesamten Zylinderhöhe verlaufenden Kühlwassermantel wird die Integration des den Ölkühler umgebenden Wassermantels in den Kühlwasserkreislauf der Brennkraftmaschine weiter verbessert, indem die Zylinderumströmung in diesem Bereich nahezu ungestört ist und damit voll funktionsfähig gehalten wird.By running essentially along the entire cylinder height Coolant jacket is the integration of the oil cooler surrounding water jacket in the cooling water circuit of the internal combustion engine further improved by the flow around the cylinder this area is almost undisturbed and therefore fully functional is held.

Durch Öffnungen in dem den Wasserkasten begrenzenden Abschnitt der Kühlwassermantelwand zur strömungsmäßigen Verbindung von Kühlwassermantelwand und Wasserkasten kann in Abhängigkeit von der Dimensionierung des Ölkühlers und des Wasserkastens und den sich daraus ergebenden Strömungsquerschnitten eine Beeinflussung des Kühlwasserstromes im Bereich des den Wasserkasten begrenzenden Abschnittes der Kühlwassermantelwand vorgenommen werden.Through openings in the section bounding the water tank the cooling water jacket wall for the fluid connection of Cooling water jacket wall and water tank can depend on the dimensioning of the oil cooler and the water tank and the resulting flow cross sections an influence of the cooling water flow in the area of the water box Section of the cooling water jacket wall can be made.

Ein Vorteil der Ausbildung von Kühlwasserkanälen in Motorquerrichtung zwischen benachbarten Zylinderwänden liegt in der weiter verbesserten Kühlwirkung, denn durch die Anordnung der Zylinder entsteht zwischen benachbarten Zylinderwänden durch die schlechtere Wärmeabfuhr ein Wärmestau, der zu unerwünschten Temperaturspitzen in den benachbarten Zylinderwänden führen kann. Durch die zwischen den benachbarten Zylinderwänden angeordneten Kühlwasserkanäle wird eine gleichmäßigere Kühlung und damit auch eine gleichmäßigere Wärmeausdehnung der einzelnen Zylinder erreicht.An advantage of the formation of cooling water channels in the cross-engine direction between adjacent cylinder walls lies in the further improved cooling effect because of the arrangement of the cylinders arises between adjacent cylinder walls through the poorer heat dissipation a heat accumulation that leads to undesirable temperature peaks in the adjacent cylinder walls. By arranged between the adjacent cylinder walls Cooling water channels will be a more uniform cooling and thus achieve a more uniform thermal expansion of the individual cylinders.

Die Merkmale der Unteransprüche geben vorteilhafte Aus- und Weiterbildungen der Erfindung an.The features of the subclaims give advantageous training and further education of the invention.

Die Ausgestaltung der Erfindung nach Anspruch 2 stellt eine bevorzugte bauliche Ausführung des Zylinderkurbelgehäuses dar. Durch die an den Kühlwassermantelwänden angeformten Schraubenpfeifen wird eine einfache und in Serienstückzahlen kostengünstig herstellbare Schraubenanbindung des Zylinderkopfes realisiert.The embodiment of the invention according to claim 2 represents a preferred one construction of the cylinder crankcase. Through the screw pipes formed on the cooling water jacket walls becomes a simple and inexpensive in series producible screw connection of the cylinder head realized.

Durch die Ausgestaltung nach den Ansprüchen 4 und 5 wird eine modulare Bauweise des Ölkühlers mit dem Deckel des Wasserkastens erreicht. Ein weiterer Vorteil liegt in der verhältnismäßig einfachen Montage und Demontage des Ölkühlers.Due to the design according to claims 4 and 5 is a modular design of the oil cooler with the lid of the water tank reached. Another advantage is the relatively simple Assembly and disassembly of the oil cooler.

Ein Vorteil der Ausgestaltung der Erfindung nach Anspruch 6 liegt darin, daß durch den einteiligen Gesamtwasserkern, der die durch Kühlwasser ausgefüllten Volumina von Wasserkasten, Kühlwassermantel und Kühlwasserkanälen umfaßt, bei der Herstellung des Zylinderkopfes (üblicherweise aus Aluminium-Druckguß) dieser Gesamtwasserkern durch einen einzigen einstückigen Gießkern darstellbar ist, der beispielsweise im Croning-Formmaskenverfahren in Serienstückzahlen einfach und kostengünstig herstellbar ist.An advantage of the embodiment of the invention according to claim 6 is that by the one-piece total water core, which the volumes of water tank filled with cooling water, cooling water jacket and cooling water channels in the manufacture of the cylinder head (usually made of die-cast aluminum) Total water core can be represented by a single, one-piece casting core is, for example, in the croning form mask process is easy and inexpensive to manufacture in large quantities.

In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
einen Längsschnitt durch ein erfindungsgemäßes Zylinderkurbelgehäuse normal zur Hochachse einer mehrzylindrigen Brennkraftmaschine, wobei seitlich an dem Zylindergehäuse ein Wasserkasten angegossen ist, in dem ein Ölkühler integriert ist,
Fig. 2
einen Querschnitt II - II des Zylinderkurbelgehäuses aus Fig. 1 und
Fig. 3
einen Querschnitt III - III des Zylinderkurbelgehäuses aus Fig. 1.
In the drawing, the invention is explained in more detail using an exemplary embodiment. Show it:
Fig. 1
2 shows a longitudinal section through a cylinder crankcase according to the invention normal to the vertical axis of a multi-cylinder internal combustion engine, a water box in which an oil cooler is integrated being cast onto the side of the cylinder housing,
Fig. 2
a cross-section II - II of the cylinder crankcase from Fig. 1 and
Fig. 3
a cross section III - III of the cylinder crankcase from FIG. 1st

Fig. 1 zeigt ein Zylinderkurbelgehäuse 1 einer nicht näher dargestellten mehrzylindrigen Brennkraftmaschine, deren Zylinder 2-5 durch Zylinderwände 2'-5' gebildet sind, die von einem sich um deren äußeren Umkreis erstreckenden Kühlwassermantel 7 umgeben sind, der durch mindestens eine Kühlwassermantelwand 10 und die Zylinderwände 2'-5' gebildet ist. Seitlich am Zylinderkurbelgehäuse 1 ist ein Ölkühler 8 angeordnet, der in einem seitlich am Zylinderkurbelgehäuse 1 angegossenen Wasserkasten 9 integriert ist. Der Ölkühler 8 ist Teil eines prinzipiell bekannten, nicht näher dargestellten Schmierölkreislaufs der Brennkraftmaschine.Fig. 1 shows a cylinder crankcase 1 of a not shown multi-cylinder internal combustion engine, the cylinders 2-5 are formed by cylinder walls 2'-5 ', which are around one the outer periphery extending cooling water jacket 7 surround are by at least one cooling water jacket wall 10 and Cylinder walls 2'-5 'is formed. On the side of the cylinder crankcase 1, an oil cooler 8 is arranged, which is in a laterally on Cylinder crankcase 1 molded water tank 9 integrated is. The oil cooler 8 is part of a principle known, not Lubricating oil circuit of the internal combustion engine shown in more detail.

Auf der dem Wasserkasten 9 gegenüberliegenden Seite 11 des Zylinderkurbelgehäuses 1 sind, jeweils in Verlängerung der zugehörigen Zylinderquerachse 2a-5a Aufnahmebohrungen 12-15 für nicht dargestellte Steckpumpen angeordnet, deren Pumpenstößel durch Nocken einer eine seitlich im Zylinderkurbelgehäuse 1 in Lagern 16 (siehe Fig. 2 und 3) gelagerten Nockenwelle betätigt werden. Zwischen den Zylindern 2-5 und den zugehörigen Aufnahmebohrungen 12-15 für die Steckpumpen sind jeweils zwei schräg zur Motor-hochachse verlaufende Löcher 18, 18'- 21, 21' angeordnet, die zur Durchführung von nicht dargestellten Stoßstangen dienen. Die Stoßstangen befinden sich an ihrem einen Ende in kraftschlüssiger Verbindung mit Nocken besagter Nockenwelle und sind an ihrem anderen Ende mit im Zylinderkopf gelagerten Kipphebeln von Einlaß- und Auslaßventilen in prinzipiell bekannter Weise verbunden.On the side 11 of the cylinder crankcase opposite the water tank 9 1 are, each in extension of the associated Cylinder transverse axis 2a-5a receiving holes 12-15 for not Plug-in pumps shown arranged, the pump plunger through Cam one side in the cylinder crankcase 1 in bearings 16 (see Fig. 2 and 3) mounted camshaft can be operated. Between cylinders 2-5 and the associated location bores 12-15 for the plug-in pumps are two at an angle to the motor vertical axis extending holes 18, 18'-21, 21 'arranged, the serve to carry out bumpers, not shown. The Bumpers are non-positively at one end Connection with the said camshaft and are on their other end with rocker arms of intake and exhaust valves connected in a manner known in principle.

Der durch den äußeren Umkreis der Zylinderwände 2'-5' und die Kühlwassermantelwand 10 gebildete Kühlwassermantel 7 ist in Richtung der Zylinderquerachsen 2a-5a beabstandet von den Zylinderwänden 2'-5' und verläuft längs der Hochachsen 2b-5b der Zylinder 2-5 und in Motorlängsrichtung. Insbesondere bildet ein Abschnitt 22 der Kühlwassermantelwand 10 gleichzeitig eine zylinderseitige Begrenzung des Wasserkastens 9, wobei der Kühlwassermantel 7 in besagtem Abschnitt 22 im wesentlichen durchgehend verläuft. In dem Abschnitt 22 der Kühlwassermantelwand 10 sind Öffnungen 23 zur strömungsmäßigen Verbindung von Kühlwassermantel 7 und Wasserkasten 9 angeordnet. The through the outer circumference of the cylinder walls 2'-5 'and the Cooling water jacket wall 10 formed cooling water jacket 7 is in Direction of the cylinder transverse axes 2a-5a spaced from the cylinder walls 2'-5 'and runs along the vertical axes 2b-5b of the cylinders 2-5 and in the engine longitudinal direction. In particular forms a Section 22 of the cooling water jacket wall 10 simultaneously a cylinder side Limitation of the water tank 9, the cooling water jacket 7 in said section 22 essentially continuously runs. In the section 22 of the cooling water jacket wall 10 are Openings 23 for fluid connection of the cooling water jacket 7 and water box 9 arranged.

Zwischen benachbarten Zylinderwänden 2',3'; 3', 4' bzw. 4',5' sind in Motorquerrichtung Kühlwasserkanäle 24, 25 bzw. 26 angeordnet, die die in Motorlängsrichtung verlaufenden und gegenüberliegenden Abschnitte 27, 28 des Kühlwassermantels 7 strömungsmäßig verbinden.Between adjacent cylinder walls 2 ', 3'; 3 ', 4' or 4 ', 5' cooling water channels 24, 25 and 26 are arranged in the transverse direction of the engine, the opposite and running in the longitudinal direction of the engine Sections 27, 28 of the cooling water jacket 7 in terms of flow connect.

An dem den Wasserkasten 9 begrenzenden Abschnitt 22 der Kühlwassermantelwand 10 sind Versteifungen in Form von Schraubenpfeifen 29 zur Schraubenanbindung eines nicht dargestellten Zylinderkopfes angeformt (siehe Fig. 2 und 3).On the section 22 of the cooling water jacket wall delimiting the water tank 9 10 are stiffeners in the form of screw pipes 29 for screw connection of a cylinder head, not shown molded (see Fig. 2 and 3).

Eine Besonderheit des erfindungsgemäßen Zylinderkurbelgehäuses 1 liegt darin, daß bei dessen Herstellung im Aluminium-Druckgußverfahren die mit Kühlwasser ausgefüllten Volumina des Kühlwassermantels 7, des Wasserkastens 9 und der Kühlwasserkanäle 24-26 durch einen einheitlichen Gesamtwasserkern darstellbar sind, der beispielsweise im Croning-Formmaskenverfahren als einstückiger Gießkern herstellbar ist.A special feature of the cylinder crankcase 1 according to the invention lies in the fact that it is produced using the aluminum die-casting process the volumes of cooling water filled with Cooling water jacket 7, the water tank 9 and the cooling water channels 24-26 can be represented by a uniform total water core are, for example in the croning form mask process as one piece Casting core can be produced.

Eine nicht dargestellte Wasserpumpe erzeugt eine zwangsweise Zirkulation des Kühlwassers im Kühlwasserkreislauf, wobei das von der Wasserpumpe geförderte Kühlwasser an einer Stirnseite 30 des Zylinderkurbelgehäuses 1 über eine dem Wasserkasten 9 zugeordnete erste Eintrittsöffnung 31 und eine dem Kühlwassermantel 7 zugeordnete zweite Eintrittsöffnung 32 in das Zylinderkurbelgehäuse 1 eintritt. Dabei sind die Hauptströmungsrichtungen der Kühlwasserströmung im Kühlwassermantel 7 und im Wasserkasten 9 im wesentlichen gleichgerichtet.A water pump, not shown, forcibly generates one Circulation of the cooling water in the cooling water circuit, the Cooling water conveyed by the water pump on an end face 30 of the cylinder crankcase 1 via an associated with the water tank 9 first inlet opening 31 and the cooling water jacket 7 assigned second inlet opening 32 in the cylinder crankcase 1 occurs. The main directions of flow are Cooling water flow in the cooling water jacket 7 and in the water tank 9 essentially rectified.

Der Ölkühler 8 ist an einem Deckel 33 des Wasserkastens 9 befestigt (siehe Fig. 2), wobei die Anschlüsse zur Zuführung des zu kühlenden und zur Abführung des gekühlten Schmieröls an dem Dekkel 33 angeordnet sind. Der Deckel 33 ist mit Schrauben in Gewindebohrungen, die in am Wasserkasten 9 angeformten Angüssen 38 eingebracht sind, befestigt. Der Ölkühler 8 ist mit dem Deckel 33 zu einer Baueinheit verbunden und mit diesem montierbar und demontierbar. The oil cooler 8 is attached to a cover 33 of the water tank 9 (see Fig. 2), the connections for feeding the to cooling and to drain the cooled lubricating oil on the lid 33 are arranged. The cover 33 is with screws in threaded holes, the sprues 38 formed on the water tank 9 are introduced, attached. The oil cooler 8 is with the lid 33 connected to a unit and mountable with it removable.

Der Kühlwasserstrom durch den Kühlwassermantel 7 und den Wasserkasten 9 ist in Fig. 1, ausgehend von den beiden stirnseitigen Einlaßöffnungen 31 und 32, mit Pfeilen W angedeutet. Das Kühlwasser strömt sowohl im Wasserkasten 9 als auch im Wassermantel 7 im wesentlichen in Richtung der Längsachse 6 des Zylinderkurbelgehäuses 1, wobei längs der Öffnungen 23 in der Kühlwassermantelwand 10 eine gewisse Vermischung der beiden Strömungen stattfindet. Stromab des Ölkühlers 8 mündet die Strömung aus dem Wasserkasten 9 in einer Öffnung 40 in den Kühlwassermantel 7 ein. Die dargestellte Strömungsführung dient in erster Linie der besseren Verdeutlichung der Kühlwasserdurchströmung des Zylinderkurbelgehäuses 1. Desweiteren kann durch eine entsprechende Dimensionierung der Kanalquerschnitte das Kühlwasser in einer gewünschten Richtung an vorgegebenen Stellen des Kühlwassermantels vorbeigeführt werden.The cooling water flow through the cooling water jacket 7 and the water tank 9 is in Fig. 1, starting from the two end faces Inlet openings 31 and 32, indicated by arrows W. The cooling water flows both in the water box 9 and in the water jacket 7 essentially in the direction of the longitudinal axis 6 of the cylinder crankcase 1, along the openings 23 in the cooling water jacket wall 10 a certain mixing of the two currents takes place. Downstream of the oil cooler 8, the flow from the Water box 9 in an opening 40 in the cooling water jacket 7 on. The flow guidance shown serves primarily the better clarification of the cooling water flow through the cylinder crankcase 1. Furthermore, by an appropriate Dimensioning of the cross sections of the cooling water in one desired direction at specified points of the cooling water jacket to be led past.

In Fig. 2 ist ein Schnitt II - II von Fig. 1 dargestellt. Gleiche Bauteile von Fig. 1 sind mit gleichen Bezugszeichen gekennzeichnet. Unterhalb des Zylinders 2 ist ein Lagerstuhl 34 eines Kurbelwellenlagers 35 einer nicht dargestellten Kurbelwelle angeordnet. Rechts oberhalb des Lagerstuhles 34 ist das Lager 16 der nicht dargestellten Nockenwelle gezeigt, wobei Lager 16 und Kurbelwellenlager 35 über eine strichliert gezeichnete Druckölleitung 39 mit Schmieröl versorgt werden.FIG. 2 shows a section II - II of FIG. 1. Same Components of Fig. 1 are identified by the same reference numerals. Below the cylinder 2 is a bearing block 34 Crankshaft bearing 35 arranged a crankshaft, not shown. The bearing 16 is on the right above the bearing chair 34 the camshaft, not shown, bearing 16 and Crankshaft bearing 35 via a dashed-line pressure oil line 39 are supplied with lubricating oil.

Der in Richtung der Längsachse 6 des Zylinderkurbelgehäuses 1 verlaufende Abschnitt 27 des Kühlwassermantels 7 erstreckt sich im wesentlichen parallel und entlang nahezu der gesamten Höhe der Zylinder 2-5. In the direction of the longitudinal axis 6 of the cylinder crankcase 1 extending section 27 of the cooling water jacket 7 extends essentially parallel and along almost the entire height the cylinder 2-5.

An dem geodätisch oberen Ende des Abschnittes 27 befindet sich je Zylinder 2-5 eine Durchtrittsöffnung 27a zu Kühlwasserkanälen im Zylinderkopf und am unteren Ende des Abschnittes befindet sich eine Ausformung 27b, die bis nahe an eine in Richtung der Längsachse 6 des Zylinderkurbelgehäuses 1 verlaufende Hauptölleitung 17 heranreicht, wodurch eine gewisse Kühlung des Schmieröls in der Hauptölleitung 17 ermöglicht wird. Insbesondere verläuft der Kühlwassermantel 7 in dem den Wasserkasten 9 begrenzenden Abschnitt 22 der Kühlwassermantelwand 10 in Richtung der Hochachse 2b bzw. 3b der Zylinder 2 bzw. 3 und in Motorlängsrichtung von einer Oberseite 37 des Zylinderkurbelgehäuses 1 bis unterhalb des Wasserkastens 9.Is located at the geodetically upper end of section 27 one passage 27a for cooling water channels per cylinder 2-5 located in the cylinder head and at the bottom of the section a formation 27b, which is close to one in the direction of the Longitudinal axis 6 of the cylinder crankcase 1 main oil line 17 approached, whereby a certain cooling of the Lubricating oil in the main oil line 17 is made possible. In particular runs the cooling water jacket 7 in the water box 9 delimiting Section 22 of the cooling water jacket wall 10 in the direction the vertical axis 2b or 3b of the cylinder 2 or 3 and in the engine longitudinal direction from an upper side 37 of the cylinder crankcase 1 to below the water tank 9.

Unterhalb der Durchtrittsöffnung 27a ist die Schraubenpfeife 29 zur Aufnahme der Schraubenanbindung für den Zylinderkopf zu sehen. Durch die Schraubenpfeife 29 erfolgt lediglich eine geringfügige Querschnittsverminderung des Kühlwassermantels 7, jedoch wird die Steifigkeit der Kühlwassermantelwand 10 wesentlich erhöht.The screw whistle 29 is below the passage opening 27a to see the screw connection for the cylinder head. The screw whistle 29 causes only a slight one Cross-sectional reduction of the cooling water jacket 7, however the rigidity of the cooling water jacket wall 10 is significantly increased.

Der Abschnitt 28 des Kühlwassermantels 7 des Zylinderkurbelgehäuses 1 verläuft ebenfalls parallel zur Längsachse 6 des Zylinderkurbelgehäuses 1 und in Richtung der Hochachse 2b des Zylinders 2. Die Höhe des Abschnittes 28 ist wegen des Nockenwellenlagers 16 etwas geringer.
Am geodätisch oberen Ende des Abschnittes 28 befindet sich eine Durchtrittsöffnung 28a zu Kühlwasserkanälen im Zylinderkopf.The section 28 of the cooling water jacket 7 of the cylinder crankcase 1 also runs parallel to the longitudinal axis 6 of the cylinder crankcase 1 and in the direction of the vertical axis 2b of the cylinder 2. The height of the section 28 is somewhat lower because of the camshaft bearing 16.
At the geodetically upper end of section 28 there is a passage opening 28a to cooling water channels in the cylinder head.

In Fig. 3 ist ein Schnitt III - III von Fig. 1 dargestellt, wobei hier der Ölkühler 8 nicht eingezeichnet ist. Gleiche Bauteile aus Fig. 1 und 2 sind mit gleichen Bezugszeichen gekennzeichnet. Auf der dem Zylinderkopf zugewandten Seite des Zylinderkurbelgehäuses 1 sind die Schraubenpfeifen 29 für die Schraubenanbindung des Zylinderkopfes angeordnet. Der Kühlwasserkanal 24, der die beiden Abschnitte 27 und 28 des Kühlwassermantels 7 strömungsmäßig verbindet, besitzt neben den Öffnungen 23 zum Wasserkasten 9 (siehe Fig. 1) auch über eine unterhalb der Schraubenpfeife 29 angeordnete Öffnung 34 eine Strömungsverbindung mit dem Wasserkasten 9.In Fig. 3 a section III - III of Fig. 1 is shown, wherein here the oil cooler 8 is not shown. Same components 1 and 2 are identified by the same reference numerals. On the side of the cylinder crankcase facing the cylinder head 1 are the screw pipes 29 for the screw connection of the cylinder head arranged. The cooling water channel 24, of the two sections 27 and 28 of the cooling water jacket 7 connects in terms of flow, has in addition to the openings 23 for Water box 9 (see Fig. 1) also via a below the Screw pipe 29 arranged opening 34 a flow connection with the water box 9.

Zwischen den beiden Schraubenpfeifen 29 besitzt der Kühlwasserkanal 24 auf seiner geodätisch oberen Seite eine gewölbte Kontur 35, wobei unterhalb dieser Kontur, in etwa in der Mitte des Kühlwasserkanals 24 ein Abstützzapfen 36 angeordnet ist, der die beiden benachbarten Zylinderwände 2' und 3' (siehe Fig. 1) gegeneinander abstützt. Der Abstützzapfen 36 ist am Zylinderkurbelgehäuse 1 angegossen.The cooling water channel has between the two screw pipes 29 24 a curved contour on its geodetically upper side 35, being below this contour, approximately in the middle of the Cooling water channel 24, a support pin 36 is arranged, which two adjacent cylinder walls 2 'and 3' (see Fig. 1) against each other supports. The support pin 36 is on the cylinder crankcase 1 cast on.

Claims (6)

  1. A cylinder crankcase in a multi-cylinder internal combustion engine in which the cylinders are formed by cylinder walls which are surrounded by a cooling jacket which extends at least in part around an outer periphery of the cylinder walls and is formed by at least one cooling jacket wall and the cylinder walls, and with a lubricating oil circuit which comprises an oil cooler positioned on the side of the cylinder crankcase, whereby positioned on the side of the crankcase and integrally cast with it is a radiator tank in which the oil cooler is integrated and which has openings to the cooling jacket which serve to connect the flows in the cooling jacket and the radiator tank, with one section of the cooling jacket wall simultaneously forming a delimitation between the cylinder and the radiator tank,
    characterised in that
    a section (22) of the cooling jacket wall (10) of the cooling jacket (7) which delimits the radiator tank (9) runs along a vertical axis (2b, 3b) of the cylinders (2, 3) and lengthways along the engine (6) from the top (37) of the cylinder crankcase (1) to underneath the radiator tank (9) in an essentially continuous manner, and whereby positioned at the front (30) of the cylinder crankcase (1) for the coolant is a first inlet opening (31) connected to the radiator tank (9) and a second inlet opening (32) connected to the cooling jacket (7), with the openings (23) in the radiator tank (9) to the cooling jacket (7) being positioned in the section (22) of the cooling jacket wall (10) which delimits the radiator tank (9), with the coolant in the radiator tank (9) and in the cooling jacket (7) flowing through the cylinder crankcase (1) essentially along the longitudinal axis of the engine (6), with a certain mixing of the two flows taking place along the openings (23) in the cooling jacket wall (10) and with coolant channels (24-26) being positioned between adjacent cylinder walls (2', 3'; 3', 4'; 4', 5') crossways across the engine to connect the flows of opposing sections (27, 28) of the cooling jacket (7).
  2. A cylinder crankcase in accordance with Claim 1,
    characterised in that
    reinforcing elements for screw pipes (29) to make a screw connection with the cylinder head are fashioned integrally with the section (22) of the cooling jacket wall (1) delimiting the radiator tank (9).
  3. A cylinder crankcase in accordance with Claim 1 or 2,
    characterised in that
    at least the cooling jacket (7) and the radiator tank (9) form a single complete water core which can be manufactured as a one-piece cast core.
  4. A cylinder crankcase in accordance with one of Claims 1 to 3,
    characterised in that
    the oil cooler (8) is fixed to a cover (33) on the radiator tank (9) with the connections to supply the lubricating oil to be cooled and to drain the cooled lubricating oil being positioned on the cover (33).
  5. A cylinder crankcase in accordance with Claim 4,
    characterised in that
    the oil cooler (8) can be fitted and removed with the cover (33) on the radiator tank (9).
  6. A cylinder crankcase in accordance with Claim 1 or 3,
    characterised in that
    the volumes contained in the radiator tank (9) the cooling jacket (7) and the coolant channels (24-26) form a complete water core which can be represented by a single-piece cast core.
EP96118314A 1996-01-09 1996-11-15 Cylinder block of a multi-cylinder internal combustion engine Expired - Lifetime EP0784150B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19600566A DE19600566C1 (en) 1996-01-09 1996-01-09 Cylinder crank casing for multicylinder internal combustion engine
DE19600566 1996-01-09

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EP0784150A1 EP0784150A1 (en) 1997-07-16
EP0784150B1 true EP0784150B1 (en) 2000-06-07

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EP (1) EP0784150B1 (en)
BR (1) BR9700019A (en)
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DE102009041708A1 (en) 2009-09-16 2011-03-24 GM Global Technology Operations, Inc., Detroit Screw pipe for cylinder head of internal combustion engine of vehicle, particularly motor vehicle, has area, where area is formed as truncated cone with base surface, cover surface and lateral area

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DE102014004232A1 (en) 2014-03-25 2015-10-01 Daimler Ag Cylinder crankcase for an internal combustion engine and method for producing a cylinder crankcase for an internal combustion engine
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US6827049B2 (en) 2002-05-28 2004-12-07 Hyundai Motor Company Water jacket for cylinder head
DE102009041708A1 (en) 2009-09-16 2011-03-24 GM Global Technology Operations, Inc., Detroit Screw pipe for cylinder head of internal combustion engine of vehicle, particularly motor vehicle, has area, where area is formed as truncated cone with base surface, cover surface and lateral area

Also Published As

Publication number Publication date
US5758608A (en) 1998-06-02
MX9700265A (en) 1998-04-30
BR9700019A (en) 1998-11-10
EP0784150A1 (en) 1997-07-16
DE59605396D1 (en) 2000-07-13
DE19600566C1 (en) 1997-04-10

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