EP0232467B1 - Multi-cylinder internal combustion engine - Google Patents

Multi-cylinder internal combustion engine Download PDF

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Publication number
EP0232467B1
EP0232467B1 EP86114449A EP86114449A EP0232467B1 EP 0232467 B1 EP0232467 B1 EP 0232467B1 EP 86114449 A EP86114449 A EP 86114449A EP 86114449 A EP86114449 A EP 86114449A EP 0232467 B1 EP0232467 B1 EP 0232467B1
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EP
European Patent Office
Prior art keywords
cylinder
internal combustion
combustion engine
engine according
liners
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EP86114449A
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German (de)
French (fr)
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EP0232467A3 (en
EP0232467A2 (en
Inventor
Herbert Dipl.-Ing. Fh Ampferer
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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    • 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
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • 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

Definitions

  • the invention relates to a multi-cylinder internal combustion engine with liquid cooling, a cylinder head and a cylinder crankcase connected to the latter and comprising cylinder liners around which the cooling medium flows.
  • the object of the invention is to provide an internal combustion engine which is lightweight and compact with functional cooling.
  • the main advantages achieved with the invention can be seen in the fact that through the cooling medium guide transversely to the longitudinal direction of the internal combustion engine, a duct system surrounding the particularly warm areas of the internal combustion engine can be realized for a relatively small cooling medium volume, which has a weight-reducing effect.
  • the reduced volume of cooling medium also ensures that the internal combustion engine quickly reaches its operating temperature, which has a favorable effect on fuel consumption and exhaust gas emission.
  • a separate and needs-based supply of cooling medium to the cylinder head and the cylinder liners is possible through the supply channel.
  • the feed channel and the outlet channel can be provided in a simple manner between the said internal combustion engine components.
  • Cross bores are used to connect the feed channel to the ring channels of the cylinder liners, which not only can be easily introduced via the recesses, but also, if necessary, for calibration of the coolant flow, e.g. can be used for internal combustion engines of different performance. Due to the arrangement of the feed channel adjacent to the exhaust valves, the principle of directionally cooling warm zones of the internal combustion engines is additionally supported. The different volume of the medium chambers of the inlet and outlet valves also contributes to this.
  • the type of arrangement of the - separate - cylinder liners used in receptacles of the cylinder crankcase enables relatively small cylinder distances and shortens the overall length of the internal combustion engine, which also has a weight-reducing effect.
  • the narrow area between the cylinder liners, in which a groove is provided can be effectively sealed.
  • the sealing sections of the cylinder head gasket in the area of the feed and outlet channel simplify the sealing between the cylinder head and the cylinder crankcase.
  • the multi-cylinder, liquid-cooled internal combustion engine comprises a cylinder head 2 and a cylinder crankcase 3; both are assembled in a horizontal connection plane A-A and are held in position by means of screws, not shown.
  • a cylinder crankcase 3 Provided in the cylinder crankcase 3 are a plurality of cylinder liners 4, 5, for example made of gray cast iron, which according to FIG. 1 are formed by separate components inserted into the cylinder crankcase 3. 2, the cylinder liner 6 is integrally - cast - connected to the cylinder crankcase 3.
  • the cylinder head 2 comprises exhaust valves 7 and intake valves 8, which run in a V-shape with respect to one another and are actuated by means of camshafts (not shown).
  • the flow of the cooling medium is marked with arrows "a".
  • the inlet 10 and the outlet 12 are the cylinder crankcase assigned to 3; but these can also be attached to the cylinder head 2.
  • the supply duct 9 and the outlet duct 11 are integrated in the internal combustion engine and run on their longitudinal sides C and D between the cylinder head 2 and the cylinder crankcase 3.
  • the supply duct 9 and the outlet duct 11 are formed by recesses 13, 14 and 15, 16 in the cylinder head 2 and the cylinder crankcase 3, the recesses 13, 14 and 15, 16 being introduced from the connection plane AA into the respective internal combustion engine components.
  • Cross bores 19, 20 are provided between the feed channel 9 and the ring channels 17, 18 surrounding the cylinder liners 4, 5, 6 (FIGS. 1 and 3). Further cross bores 21, 22 connect the ring channels 17, 18 to the outlet channel 11.
  • the cross bores 19, 20 and 21, 22 are machined via the recesses 13 and 15, their machining direction extending obliquely to a central longitudinal plane EE of the internal combustion engine 1 (FIG. 1).
  • the feed channel 9 runs adjacent to the outlet valves 7.
  • the coolant passes from the feed channel 9 via transverse bores 23 into the medium chambers 24 surrounding the outlet valves 7 and then flows, previously passing through the medium chambers 25 above the inlet valves 8, into the outlet channel 11.
  • the medium chambers 24 of the outlet valves 7 are larger than the medium chambers 25 of the inlet valves due to the temperature conditions prevailing there in terms of volume.
  • the cylinder liners 5 have flats 27, 28 and essentially the same wall thicknesses. The flats 27, 28 are formed by reducing the wall thickness (FIG. 8).
  • receptacles 29 (FIG. 5) of the cylinder crankcase 3 into which the cylinder bushings 4, 5 are fitted.
  • the wall thicknesses of the cylinder liners 4, 5 and the receptacles 29 are approximately the same.
  • the wall thicknesses of the cylinder liners 4, 5 and the receptacles 29 are optimized in the area of the cylinder liners placed next to one another, i.e. with good strength as thin-walled as possible.
  • a groove 30 is provided (FIG. 5), into which a one-piece metallic cylinder head gasket 31 is inserted.
  • the groove 30 is formed by angular recesses 32, 33 of the cylinder liners 4, 5.
  • the groove 30 is continued outside the mutually facing cylinder liners 4, 5 (FIG. 4), where it is represented by a wall 34 of the cylinder crankcase 3 and the respective recess 32 or 33 of the cylinder liners 4, 5. At a distance from the recesses 32, 33, a collar 35 is provided on the cylinder liners 4, 5 and bears against a support 36 of the cylinder crankcase 3.
  • the cylinder head gasket 31 (FIG. 7) is provided with sealing sections 37, 38. These are effective between the cylinder head 2 and the cylinder crankcase 3, specifically in the area of the supply duct 9 and the outlet duct 11.
  • the sealing sections 37, 38 have a metallic extension 39 of the cylinder head gasket 31, which carries a sealing body 40 made of elastic material - silicone.

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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)

Description

Die Erfindung betrifft eine mehrzylindrige Brennkraftmaschine mit Flüssigkeitskühlung, einem Zylinderkopf und einem mit letzterem verbundenen Zylinderkurbelgehäuse, das vom Kühlmedium umströmte Zylinderlaufbüchsen umfasst.The invention relates to a multi-cylinder internal combustion engine with liquid cooling, a cylinder head and a cylinder crankcase connected to the latter and comprising cylinder liners around which the cooling medium flows.

Brennkraftmaschinen, die bezüglich Gewicht und Abmessungen optimiert, gemeint ist leichtgewichtig und kompakt, sind, fördern Bestrebungen im Automobilbau, Herstellkosten und Betriebskosten von Personenwagen zu begrenzen bzw. zu reduzieren. Gewichtserhöhend können sich bei Brennkraftmaschinen nicht nur große Zylinderabstände (Fachbuch "Die Konstruktion schnellaufender Verbrennungsmotoren", Walter de Gruyter, Berlin-New York, 1973, Seite 21) sondern auch überdimensionierte Kühlmittelkanäle und die darin zirkulierende Mediummenge auswirken.Internal combustion engines that are optimized in terms of weight and dimensions, meaning lightweight and compact, promote efforts in automobile construction to limit or reduce the manufacturing and operating costs of passenger cars. Not only large cylinder distances can increase the weight of internal combustion engines (specialist book "The construction of high-speed internal combustion engines", Walter de Gruyter, Berlin-New York, 1973, page 21), but also oversized coolant channels and the amount of medium circulating in them.

In der US-PS 2 078 499 sind eine Einlaßleitung und eine Auslaßleitung zur Versorgung der Brennkraftmaschine mit Kühlmittel zu beiden Seiten einer Zylinderreihe außerhalb der Brennkraftmaschine verlegt. Von der Einlaßleitung weggeführt sind Querleitungen, über die das Kühlmittel zu den Zylindern und von dort über weitere Querleitungen zu der Auslaßleitung geführt wird.In US Pat. No. 2,078,499, an inlet line and an outlet line for supplying the internal combustion engine with coolant are laid on both sides of a row of cylinders outside the internal combustion engine. Cross lines are led away from the inlet line, via which the coolant is led to the cylinders and from there via further cross lines to the outlet line.

Aufgabe der Erfindung ist es, eine Brennkraftmaschine zu schaffen, die bei funktionsgerechter Kühlung leichtgewichtig und kompakt ist.The object of the invention is to provide an internal combustion engine which is lightweight and compact with functional cooling.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere, die Erfindung ausgestaltende Merkmale sind in den Unteransprüchen enthalten.According to the invention, this object is achieved by the characterizing features of claim 1. Further features embodying the invention are contained in the subclaims.

Die mit der Erfindung hauptsächlich erzielten Vorteile sind darin zu sehen, daß durch die Kühlmediumführung quer zur Längsrichtung der Brennkraftmaschine ein die besonders warmen Bereiche der Brennkraftmaschine funktionsgerecht umgebendes Kanalsystem für ein relativ kleines Kühlmediumvolumen realisierbar ist, was sich gewichtsmindernd auswirkt. Auch wird durch das reduzierte Kühlmediumvolumen erreicht, daß die Brennkraftmaschine rasch ihre Betriebstemperatur erreicht, was sich günstig auf den Kraftstoffverbrauch und die Abgasemission auswirkt.The main advantages achieved with the invention can be seen in the fact that through the cooling medium guide transversely to the longitudinal direction of the internal combustion engine, a duct system surrounding the particularly warm areas of the internal combustion engine can be realized for a relatively small cooling medium volume, which has a weight-reducing effect. The reduced volume of cooling medium also ensures that the internal combustion engine quickly reaches its operating temperature, which has a favorable effect on fuel consumption and exhaust gas emission.

Durch den Zuführungskanal ist eine getrennte und bedarfsgerechte Kühlmediumversorgung des Zylinderkopfs und der Zylinderlaufbüchsen möglich. Der Zuführungskanal und der Austrittskanal sind auf einfache Weise zwischen den besagten Brennkraftmaschinenbauteilen vorsehbar. Zur Verbindung des Zuführungskanals mit den Ringkanälen der Zylinderlaufbüchsen dienen Querbohrungen, die nicht nur über die Ausnehmungen leicht eingebracht werden können, sondern auch, falls erforderlich, zur Kalibrierung des Kühlmediumstroms, z.B. für Brennkraftmaschinen unterschiedlicher Leistung, herangezogen werden können. Aufgrund der Anordnung des Zuführungskanals benachbart den Auslaßventilen wird das Prinzip, warme Zonen der Brennkraftmaschinen gerichtet zu kühlen, zusätzlich unterstützt. Auch trägt hierzu das unterschiedliche Volumen der Mediumkammern der Ein-und Auslaßventile bei.A separate and needs-based supply of cooling medium to the cylinder head and the cylinder liners is possible through the supply channel. The feed channel and the outlet channel can be provided in a simple manner between the said internal combustion engine components. Cross bores are used to connect the feed channel to the ring channels of the cylinder liners, which not only can be easily introduced via the recesses, but also, if necessary, for calibration of the coolant flow, e.g. can be used for internal combustion engines of different performance. Due to the arrangement of the feed channel adjacent to the exhaust valves, the principle of directionally cooling warm zones of the internal combustion engines is additionally supported. The different volume of the medium chambers of the inlet and outlet valves also contributes to this.

Die Art der Anordnung der in Aufnahmen des Zylinderkurbelgehäuses eingesetzten - separaten - Zylinderlaufbüchsen ermöglicht relativ geringe Zylinderabstände und verkürzt die Baulänge der Brennkraftmaschine, was sich ebenfalls gewichtsmindernd auswirkt. Mit der einstückigen metallischen Zylinderkopfdichtung läßt sich der schmale Bereich zwischen den Zylinderlaufbüchsen, in dem eine Nut vorgesehen ist, wirkungsvoll abdichten. Schließlich vereinfachen die Dichtabschnitte der Zylinderkopfdichtung im Bereich des Zuführungs-und Austrittskanals die Abdichtung zwischen Zylinderkopf und Zylinderkurbelgehäuse.The type of arrangement of the - separate - cylinder liners used in receptacles of the cylinder crankcase enables relatively small cylinder distances and shortens the overall length of the internal combustion engine, which also has a weight-reducing effect. With the one-piece metallic cylinder head gasket, the narrow area between the cylinder liners, in which a groove is provided, can be effectively sealed. Finally, the sealing sections of the cylinder head gasket in the area of the feed and outlet channel simplify the sealing between the cylinder head and the cylinder crankcase.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt, die nachstehend näher beschrieben sind.In the drawing, embodiments of the invention are shown, which are described in more detail below.

Es zeigtIt shows

  • Fig. 1 einen Teilquerschnitt einer Brennkraftmaschine im Bereich eines Zylinderkopfs und eines Zylinderkurbelgehäuses,1 shows a partial cross section of an internal combustion engine in the region of a cylinder head and a cylinder crankcase,
  • Fig. 2 eine Einzelheit X der Fig. 2,2 shows a detail X of FIG. 2,
  • Fig. 3 einen Schnitt nach der Linie 111-111 der Fig. 1,3 shows a section along the line 111-111 of FIG. 1,
  • Fig. 4 einen Schnitt nach der Linie IV-IV der Fig. 3. in größerem Maßstab,4 shows a section along the line IV-IV of FIG. 3 on a larger scale,
  • Fig. 5 einen Schnitt nach der Linie V-V der Fig. 3,5 shows a section along the line V-V of FIG. 3,
  • Fig. 6 eine Einzelheit Y der Fig. 5 in größerem Maßstab,6 shows a detail Y of FIG. 5 on a larger scale,
  • Fig. 7 eine Einzelheit Z der Fig. 1 in größerem Maßstab,7 shows a detail Z of FIG. 1 on a larger scale,
  • Fig. 8 einen Schnitt nach der Linie VIII-VIII der Fig. 58 is a section along the line VIII-VIII of FIG. 5th

Die mehrzylindrige flüssigkeitsgekühlte Brennkraftmaschine umfasst einen Zylinderkopf 2 und ein Zylinderkurbelgehäuse 3; beide sind in einer horizontalen Verbindungsebene A-A zusammengesetzt und werden mittels nicht gezeigter Schrauben in Lage gehalten. Im Zylinderkurbelgehäuse 3 sind mehrere, beispielsweise aus Grauguß bestehende, Zylinderlaufbüchsen 4, 5 vorgesehen, die nach Fig. 1 durch separate, in das Zylinderkurbelgehäuse 3 eingesetzte Bauteile gebildet werden. Gemäß Fig. 2 ist die Zylinderlaufbüchse 6 einstückig - gegossen - mit dem Zylinderkurbelgehäuse 3 verbunden.The multi-cylinder, liquid-cooled internal combustion engine comprises a cylinder head 2 and a cylinder crankcase 3; both are assembled in a horizontal connection plane A-A and are held in position by means of screws, not shown. Provided in the cylinder crankcase 3 are a plurality of cylinder liners 4, 5, for example made of gray cast iron, which according to FIG. 1 are formed by separate components inserted into the cylinder crankcase 3. 2, the cylinder liner 6 is integrally - cast - connected to the cylinder crankcase 3.

Der Zylinderkopf 2 umfasst Auslaßventile 7 und Einlaßventile 8, die V-förmig zueinander verlaufen und mittels nicht dargestellter Nockenwellen betätigt werden. Zur Kühlung der Brennkraftmaschine 1 weist sie entlang ihrer einen Längsseite - in Längsrichtung B-B der Brennkraftmaschine gesehen - einen Zuführungskanal 9 auf, der bei 10 einen Einlaß aufweist, in das das flüssige Kühlmedium, das von einer nicht gezeigten Wasserpumpe gefördert wird, eintritt. Von diesem Zuführungskanal 9 aus wird das Kühlmedium quer zur Längsrichtung B-B durch den Zylinderkopf 2 geführt und an den Zylinderlaufbüchsen 4, 5, 6 vorbeigeleitet - Querstromkühlung - und gelangt in den Austrittskanal 11, dessen Ausgang mit 12 bezeichnet ist und von wo aus das Kühlmedium zu einem nicht dargestellten Kühler strömt. Der Strom des Kühlmediums ist mit Pfeilen "a" gekennzeichnet. Im Ausführungsbeispiel sind der Einlaß 10 und der Ausgang 12 dem Zylinderkurbelgehäuse 3 zugeordnet; diese können aber auch am Zylinderkopf 2 angebracht sein.The cylinder head 2 comprises exhaust valves 7 and intake valves 8, which run in a V-shape with respect to one another and are actuated by means of camshafts (not shown). To cool the internal combustion engine 1, it has along its one long side - seen in the longitudinal direction BB of the internal combustion engine - a feed channel 9 which has an inlet at 10 into which the liquid cooling medium which is conveyed by a water pump, not shown, enters. From this supply channel 9, the cooling medium is guided transversely to the longitudinal direction BB through the cylinder head 2 and bypasses the cylinder liners 4, 5, 6 - cross-flow cooling - and reaches the outlet channel 11, the outlet of which is designated 12, and from where the cooling medium flows flows a cooler, not shown. The flow of the cooling medium is marked with arrows "a". In the exemplary embodiment, the inlet 10 and the outlet 12 are the cylinder crankcase assigned to 3; but these can also be attached to the cylinder head 2.

Der Zuführungskanal 9 und der Austrittskanal 11 sind in die Brennkraftmaschine integriert und verlaufen an deren Längsseiten C und D zwischen Zylinderkopf 2 und Zylinderkurbelgehäuse 3. Gebildet werden der Zuführungskanal 9 und der Austrittskanal 11 durch Ausnehmungen 13,14 und 15,16 im Zylinderkopf 2 und Zylinderkurbelgehäuse 3, wobei die Ausnehmungen 13, 14 und 15, 16 von der Verbindungsebene A-A aus in die jeweiligen Brennkraftmaschinenbauteile eingebracht sind.The supply duct 9 and the outlet duct 11 are integrated in the internal combustion engine and run on their longitudinal sides C and D between the cylinder head 2 and the cylinder crankcase 3. The supply duct 9 and the outlet duct 11 are formed by recesses 13, 14 and 15, 16 in the cylinder head 2 and the cylinder crankcase 3, the recesses 13, 14 and 15, 16 being introduced from the connection plane AA into the respective internal combustion engine components.

Zwischen dem Zuführungskanal 9 und die Zylinderlaufbüchsen 4, 5, 6 umgebenden Ringkanälen 17, 18 sind Querbohrungen 19, 20 vorgesehen (Fig. 1 und 3). Weitere Querbohrungen 21, 22 verbinden die Ringkanäle 17, 18 mit dem Austrittskanal 11. Die Querbohrungen 19, 20 und 21, 22 werden über die Ausnehmungen 13 und 15 eingearbeitet, wobei sich ihre Bearbeitungsrichtung schräg zu einer Mittellängsebene E-E der Brennkraftmaschine 1 erstreckt (Fig. 1). Der Zuführungskanal 9 verläuft benachbart den Auslaßventilen 7. Das Kühlmittel gelangt vom Zuführungskanal 9 aus über Querbohrungen 23 in die Auslaßventile 7 umgebende Mediumkammem 24 und strömt dann, zuvor noch Mediumkammem 25 oberhalb der Einlaßventile 8 passierend, in den Austrittskanal 11. Die Mediumkammem 24 der Auslaßventile 7 sind aufgrund der dort herrschenden Temperaturverhältnisse hinsichtlich Volumen größer als die Mediumkammem 25 der Einlaßventile.Cross bores 19, 20 are provided between the feed channel 9 and the ring channels 17, 18 surrounding the cylinder liners 4, 5, 6 (FIGS. 1 and 3). Further cross bores 21, 22 connect the ring channels 17, 18 to the outlet channel 11. The cross bores 19, 20 and 21, 22 are machined via the recesses 13 and 15, their machining direction extending obliquely to a central longitudinal plane EE of the internal combustion engine 1 (FIG. 1). The feed channel 9 runs adjacent to the outlet valves 7. The coolant passes from the feed channel 9 via transverse bores 23 into the medium chambers 24 surrounding the outlet valves 7 and then flows, previously passing through the medium chambers 25 above the inlet valves 8, into the outlet channel 11. The medium chambers 24 of the outlet valves 7 are larger than the medium chambers 25 of the inlet valves due to the temperature conditions prevailing there in terms of volume.

Die Zylinderlaufbüchsen 4, 5 sind benachbart dem Zylinderkopf 2 über einen wesentlichen Teilbereich ihrer Gesamtlänge - das ist etwa die Länge G (= mehr als die Hälfte der Gesamtlänge der Zylinderlaufbüchsen) - unmittelbar aneinandergesetzt, wobei zwischen den Zylinderlaufbüchsen 4, 5 ein geringer Abstand 26 zur Durchströmung des Mediums vorgesehen ist. In diesem Bereich weisen die Zylinderlaufbüchsen 5 Abflachungen 27, 28 und im wesentlichen gleiche Wanddicken auf. Die Abflachungen 27, 28 werden durch Wanddickenreduzierung gebildet (Fig. 8).The cylinder liners 4, 5 are adjacent to the cylinder head 2 over a substantial portion of their total length - that is approximately the length G (= more than half the total length of the cylinder liners) - placed directly next to each other, with a small distance 26 between the cylinder liners 4, 5 Flow of the medium is provided. In this area, the cylinder liners 5 have flats 27, 28 and essentially the same wall thicknesses. The flats 27, 28 are formed by reducing the wall thickness (FIG. 8).

Im Anschluß an diesen Bereich, also entfernt vom Zylinderkopf 2, verlaufen Aufnahmen 29 (Fig. 5) des Zylinderkurbelgehäuses 3, in die die Zylindedaufbüchsen 4, 5 eingepasst sind. Die Wanddicken der Zylinderlaufbüchsen 4, 5 und der Aufnahmen 29 sind etwa gleich, Außerdem sind die Wanddicken der Zylindedaufbuchsen 4, 5 und der Aufnahmen 29 in dem aneinandergesetzten Bereich der Zylinderlaufbüchsen optimiert, d.h. bei guter Festigkeit möglichst dünnwandig.Following this area, that is, away from the cylinder head 2, there are receptacles 29 (FIG. 5) of the cylinder crankcase 3 into which the cylinder bushings 4, 5 are fitted. The wall thicknesses of the cylinder liners 4, 5 and the receptacles 29 are approximately the same. In addition, the wall thicknesses of the cylinder liners 4, 5 and the receptacles 29 are optimized in the area of the cylinder liners placed next to one another, i.e. with good strength as thin-walled as possible.

Zwischen den Zylinderlaufbüchsen 4, 5, und zwar benachbart dem Zylinderkopf 2, ist eine Nut 30 vorgesehen (Fig. 5), in die eine einstückige metallische Zylinderkopfdichtung 31 eingesetzt ist. Die Nut 30 wird durch winkelige Ausnehmungen 32, 33 der Zylinderlaufbüchsen 4, 5 gebildet.Between the cylinder liners 4, 5, namely adjacent to the cylinder head 2, a groove 30 is provided (FIG. 5), into which a one-piece metallic cylinder head gasket 31 is inserted. The groove 30 is formed by angular recesses 32, 33 of the cylinder liners 4, 5.

Die Nut 30 ist außerhalb der einander zugekehrten Zylinderlaufbüchsen 4, 5 fortgeführt (Fig. 4), wo sie durch eine Wand 34 des Zylinderkurbelgehäuses 3 und die jeweilige Ausnehmung 32 oder 33 der Zylinderlaufbüchsen 4, 5 dargestellt ist. Mit Abstand zu den Ausnehmungen 32, 33 ist an den Zylinderlaufbüchsen 4, 5 ein Kragen 35 vorgesehen, der an einer Abstützung 36 des Zylinderkurbelgehäuses 3 anliegt.The groove 30 is continued outside the mutually facing cylinder liners 4, 5 (FIG. 4), where it is represented by a wall 34 of the cylinder crankcase 3 and the respective recess 32 or 33 of the cylinder liners 4, 5. At a distance from the recesses 32, 33, a collar 35 is provided on the cylinder liners 4, 5 and bears against a support 36 of the cylinder crankcase 3.

Die Zylinderkopfdichtung 31 (Fig. 7) ist mit Dichtabschnitten 37, 38 versehen. Diese sind zwischen Zylinderkopf 2 und Zylinderkurbelgehäuse 3 wirksam, und zwar im Bereich des Zuführungskanals 9 und des Austrittskanals 11. Die Dichtabschnitte 37, 38 weisen eine metallische Verlängerung 39 der Zylinderkopfdichtung 31 auf, die einen Dichtkörper 40 aus elastischem Werkstoff - Silikon - trägt.The cylinder head gasket 31 (FIG. 7) is provided with sealing sections 37, 38. These are effective between the cylinder head 2 and the cylinder crankcase 3, specifically in the area of the supply duct 9 and the outlet duct 11. The sealing sections 37, 38 have a metallic extension 39 of the cylinder head gasket 31, which carries a sealing body 40 made of elastic material - silicone.

Claims (16)

1. A multiple-cylinder internal combustion engine having liquid cooling, a cylinder head (2) and a cylinder crankcase. (3) connected thereto and comprising cylinder liners (4, 5) which are inserted into the cylinder crankcase (3) and around which coolant flows, the collant for the individual cylidners being conveyed transversely to the longitudinal direction (B-B) of the internal combustion engine through the cylinder head and around the cylinder liners and flowing out of a feeding duct (9) into a discharge duct (11), characterized by the following features:
- the feeding duct (9) and the discharge duct (11) are integrated in the internal combustion engine (1) on the longitudinal sides (C and D) thereof and are formed by recesses (13, 14; 15, 16) in the cylinder head (2) and in the cylinder crankcase (3);
-the recesses (13, 14; 15, 16) start from a connexion plane (A-A) between cylinder head (2) and cylinder head (3).
2. A multiple-cylinder internal combustion engine according to Claim 1, characterized in that the feeding duct (9) is connected by way of transverse bores (19, 20) to annular ducts (17, 18) surrounding the cylinder liners (4, 5, 6).
3. A multiple-cylinder internal combustion engine according to claim 1, characterized in that the annular ducts (17, 18) are connected by way of transverse bores (21, 22) to the discharge duct (11).
4. A multiple-cylinder internal combustion engine according to Claims 1 and 3, characterized in that the transverse bores (19, 20, 21, 22) open by way of the recesses (13, 15).
5. A multiple-cylinder internal combustion engine according to Claim 1, the cylinder head of which comprises intake and exhaust valves arranged overhead and preferably in a V-shape, characterized in that the feeding duct (9) is arranged adjacent to the exhaust valves (7) and the coolant flows by way of transverse bores (23) first into coolant chambers (24) surrounding the exhaust valves (7) and then into coolant chambers (25) surrounding the inlet valves (8), and from there it reaches the discharge duct (11).
6. A multiple-cylinder internal combustion engine according to Claim 1, the cylinder liners of which are inserted in recesses in the cylinder crankcase, characterized in that starting adjacent to the cylinder head (2) the cylinder liners (4, 5) are arranged directly adjacent but at a slight distance (26) over a substantial portion (length G) and have substantially equal wall thicknesses there, and the receiving means (29) of the cylinder crankcase (3) extend in an adjacent area.
7. A multiple-cylinder internal combustion engine according to Claim 6, characterized in that a groove (30) is provided between the cylinder liners (4, 5), namely adjacent to the cylinder head (2), and is formed by recesses (32, 33) in the cylinder liners (4, 5) and into which a one-piece metal cylinder-head seal (31) is inserted.
8. A multiple-cylinder internal combustin engine according to Claim 6, characterized in that the cylinder liners (4, 5) have flattened portions (27, 28) on the mutually facing sides.
9. A multiple-cylinder internal combustion engine according to Claim 8, characterized in that the flattened portions (27, 28) are formed by reducing the wall thickness of the respective cylinder liners (4 or 5).
10. A multiple-cylinder internal combustion engine according to Claim 7, characterized in that the groove (30) is continued outside the mutually facing sides of the cylinder liners (4, 5) and is formed there by a wall (34) of the cylinder crankcase (3) and the respective recess (32 or 33) of the cylinder liners (4, 5).
11. A multiple-cylinder internal combustion engine according to Claim 10, characterized in that adjacent to the recess (33) each cylinder liner (5) is provided with a collar (35) which rests against a support (36) of the cylinder crankcase (3).
12. A multiple-cylinder internal combustion engine according to Claim 6, characterized in that the receiving means (29) of the cylinder crankcase (3) and the wall thicknesses of the cylinder liners (4, 5) adjacent thereto are substantially equal.
13. A multiple-cylidner internal combustion engine according to Claims 1 and 7, characterized in that the cylinder-head seal (31) is provided with sealing portions (37, 38) effective between the cylinder head (2) and the cylinder crankcase (3) in the region of the feeding duct (9) and the discharge duct (11).
14. A multiple-cylinder internal combustion engine according to Claim 13, characterized in that the sealing portions (37, 38) comprise metal extensions (39) on the cylinder head seal (31), which carry a sealing head (40) of resilient material.
15. A multiple-cylinder internal combustion engine according to Claim 1, characterized in that the cylinder head (2) and the cylinder liners (4, 5) are supplied with coolant separately from one another.
16. A multiple-cylinder internal combustion engine according to Claim 5, characterized in that the volume of the coolant chambers (24) of the exhaust valves (7) is greater than the volume of the coolant chambers (25) of the inlet valves (8).
EP86114449A 1986-02-06 1986-10-18 Multi-cylinder internal combustion engine Expired - Lifetime EP0232467B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3603674 1986-02-06
DE19863603674 DE3603674A1 (en) 1986-02-06 1986-02-06 MULTI-CYLINDER COMBUSTION ENGINE

Publications (3)

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EP0232467A2 EP0232467A2 (en) 1987-08-19
EP0232467A3 EP0232467A3 (en) 1988-06-22
EP0232467B1 true EP0232467B1 (en) 1990-07-18

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EP86114449A Expired - Lifetime EP0232467B1 (en) 1986-02-06 1986-10-18 Multi-cylinder internal combustion engine

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US (1) US4759317A (en)
EP (1) EP0232467B1 (en)
JP (1) JPS62186041A (en)
DE (2) DE3603674A1 (en)
ES (1) ES2017616B3 (en)

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Also Published As

Publication number Publication date
JPS62186041A (en) 1987-08-14
DE3603674A1 (en) 1987-08-13
US4759317A (en) 1988-07-26
DE3672812D1 (en) 1990-08-23
EP0232467A3 (en) 1988-06-22
EP0232467A2 (en) 1987-08-19
DE3603674C2 (en) 1988-02-25
ES2017616B3 (en) 1991-03-01

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