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EP0232467A2 - Multi-cylinder internal combustion engine - Google Patents

Multi-cylinder internal combustion engine Download PDF

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Publication number
EP0232467A2
EP0232467A2 EP86114449A EP86114449A EP0232467A2 EP 0232467 A2 EP0232467 A2 EP 0232467A2 EP 86114449 A EP86114449 A EP 86114449A EP 86114449 A EP86114449 A EP 86114449A EP 0232467 A2 EP0232467 A2 EP 0232467A2
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EP
European Patent Office
Prior art keywords
cylinder
internal combustion
combustion engine
engine according
liners
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
Application number
EP86114449A
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German (de)
French (fr)
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EP0232467A3 (en
EP0232467B1 (en
Inventor
Herbert Dipl.-Ing. Fh Ampferer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Publication date
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Publication of EP0232467A2 publication Critical patent/EP0232467A2/en
Publication of EP0232467A3 publication Critical patent/EP0232467A3/en
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Publication of EP0232467B1 publication Critical patent/EP0232467B1/en
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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
    • F02F1/16—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 channel 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 inlet 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 internal combustion engine 1 For cooling the internal combustion engine 1, it has along its one long side - seen in the longitudinal direction B-B 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 feed 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 is supplied flows a cooler, not shown.
  • the flow of the cooling medium is marked with arrows "a".
  • the inlet 10 and the outlet 12 are assigned to the cylinder crankcase 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 transverse bores 19, 20 and 21, 22 are machined through 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).
  • 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 extends through a wall 34 of the cylinder crankcase 3 and the respective recess 32 or 33 of the cylinder liners 4, 5 is shown. 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)

Abstract

Diese Brennkraftmaschine mit Flüssigkeitskühlung umfasst einen Zylinderkopf und ein mit diesem verbundenes Zylinderkurbelgehäuse, das vom Kühlmedium umströmte Zylinderlaufbüchsen umfasst. Zur Gewichtsminderung der Brennkraftmaschine wird die Kühlmediummenge reduziert und der Zylinderkopf und die Zylinderlaufbüchsen durch eine Querstromkühlung mit Kühlmedium beaufschlagt. Außerdem ist durch die besondere Ausbildung der Zylinderlaufbüchsen eine kurz bauende und relativ leichte Brennkraftmaschineneinheit geschaffen.This internal combustion engine with liquid cooling comprises a cylinder head and a cylinder crankcase connected to it and comprising cylinder liners around which the cooling medium flows. In order to reduce the weight of the internal combustion engine, the amount of cooling medium is reduced and the cylinder head and the cylinder liners are acted upon by cooling flow through cross-flow cooling. In addition, the special design of the cylinder liners creates a short and relatively light internal combustion engine unit.

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.

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 channel 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 inlet 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.
Es zeigt

  • Fig. 1 einen Teilquerschnitt einer Brennkraftmaschine im Bereich eines Zylinderkopfs und eines Zylinderkurbelgehäuses,
  • Fig. 2 eine Einzelheit X der Fig. 2,
  • Fig. 3 einen Schnitt nach der Linie III-III der Fig. 1,
  • Fig. 4 einen Schnitt nach der Linie IV-IV der Fig. 3. in größerem Maßstab,
  • Fig. 5 einen Schnitt nach der Linie V-V der Fig. 3,
  • Fig. 6 eine Einzelheit Y der Fig. 5 in größerem Maßstab,
  • Fig. 7 eine Einzelheit Z der Fig. 1 in größerem Maßstab,
  • Fig. 8 einen Schnitt nach der Linie VIII-VIII der Fig. 5
In the drawing, embodiments of the invention are shown, which are described in more detail below.
It shows
  • 1 shows a partial cross section of an internal combustion engine in the region of a cylinder head and a cylinder crankcase,
  • 2 shows a detail X of FIG. 2,
  • 3 shows a section along the line III-III of FIG. 1,
  • 4 shows a section along the line IV-IV of FIG. 3 on a larger scale,
  • 5 shows a section along the line VV of FIG. 3,
  • 6 shows a detail Y of FIG. 5 on a larger scale,
  • 7 shows a detail Z of FIG. 1 on a larger scale,
  • 8 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). For cooling the internal combustion engine 1, it has along its one long side - seen in the longitudinal direction B-B 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 feed 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 is supplied 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 assigned to the cylinder crankcase 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 Mediumkammern 24 und strömt dann, zuvor noch Mediumkammern 25 oberhalb der Einlaßventile 8 passierend, in den Aus­trittskanal 11. Die Mediumkammern 24 der Auslaßventile 7 sind aufgrund der dort herrschenden Temperaturverhältnisse hinsichtlich Volumen größer als die Mediumkammern 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 transverse bores 19, 20 and 21, 22 are machined through 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 Zylinder­laufbüchsen 4, 5 eingepasst sind. Die Wanddicken der Zylinderlaufbüchsen 4, 5 und der Aufnahmen 29 sind etwa gleich, Außerdem sind die Wanddicken der Zylinderlaufbuchsen 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 liners 4, 5 are fitted. The wall thicknesses of the cylinder liners 4, 5 and the receptacles 29 are approximately the same. 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 extends through a wall 34 of the cylinder crankcase 3 and the respective recess 32 or 33 of the cylinder liners 4, 5 is shown. 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 (17)

1. Mehrzylindrige Brennkraftmaschine mit Flüssigkeitskühlung, einem Zylinderkopf und einem mit letzterem verbundenen Zylinderkurbelgehäuse, das vom Kühlmedium umströmte Zylinderlaufbüchsen umfasst, dadurch gekenn­zeichnet, daß das Kühlmedium für die einzelnen Zylinder quer zur Längsrichtung (B-B) der Brennkraftmaschine (1) durch den Zylinderkopf (2) geführt und an den Zylinderlaufbüchsen (5, 6) des Zylinderkurbelgehäuses (3) vorbeigeleitet wird, wobei das Kühlmedium aus einem Zuführungskanal (9) in einen Aus­trittskanal (11) strömt.1. Multi-cylinder internal combustion engine with liquid cooling, a cylinder head and a cylinder crankcase connected to the latter, which comprises cylinder liners around which the cooling medium flows, characterized in that the cooling medium for the individual cylinders transversely to the longitudinal direction (BB) of the internal combustion engine (1) through the cylinder head (2) guided and past the cylinder liners (5, 6) of the cylinder crankcase (3), the cooling medium flowing from a supply channel (9) into an outlet channel (11). 2. Mehrzylindrige Brennkraftmaschine nach Anspruch 1, dadurch gekenn­zeichnet, daß der Zuführungskanal (9) und der Austrittskanal (11) in die Brennkraftmaschine (1), vorzugsweise an ihren Längsseiten (C und D), integriert sind und durch Ausnehmungen (13, 14; 15, 16) im Zylinderkopf (2) und im Zylinderkurbelgehäuse (3) gebildet werden, wobei die Ausnehmungen (13, 14; 15, 16) von einer Verbindungsebene (A-A) zwischen Zylinderkopf (2) und Zylinderkurbelgehäuse (3) aus eingebracht sind.2. Multi-cylinder internal combustion engine according to claim 1, characterized in that the supply channel (9) and the outlet channel (11) in the internal combustion engine (1), preferably on their long sides (C and D), are integrated and through recesses (13, 14; 15, 16) are formed in the cylinder head (2) and in the cylinder crankcase (3), the recesses (13, 14; 15, 16) being made from a connecting plane (AA) between the cylinder head (2) and the cylinder crankcase (3). 3. Mehrzylindrige Brennkraftmaschine nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß der Zuführungskanal (9) über Querbohrungen (19, 20) mit die Zylinderlaufbüchsen (4, 5, 6) umgebenden Ringkanälen (17, 18) verbunden ist.3. Multi-cylinder internal combustion engine according to claims 1 and 2, characterized in that the supply channel (9) via transverse bores (19, 20) with the cylinder liners (4, 5, 6) surrounding ring channels (17, 18) is connected. 4. Mehrzylindrige Brennkraftmaschine nach Anspruch 2, dadurch gekenn­zeichnet, daß die Ringkanäle (17, 18) über Querbohrungen (21, 22) mit dem Austrittskanal (11) verbunden sind.4. Multi-cylinder internal combustion engine according to claim 2, characterized in that the ring channels (17, 18) via transverse bores (21, 22) are connected to the outlet channel (11). 5. Mehrzylindrige Brennkraftmaschine nach den Ansprüchen 2 und 4, dadurch gekennzeichnet, daß die Querbohrungen (19, 20, 21, 22) über die Ausnehmungen (13, 15) eingearbeitet sind.5. Multi-cylinder internal combustion engine according to claims 2 and 4, characterized in that the transverse bores (19, 20, 21, 22) are incorporated via the recesses (13, 15). 6. Mehrzylindrige Brennkraftmaschine nach Anspruch 1, deren Zylinderkopf hängend und vorzugsweise V-förmig angeordnete Ein- und Auslaßventile umfasst, dadurch gekennzeichnet, daß der Zuführungskanal (9) benachbart den Auslaßventilen (7) angeordnet ist und das Kühlmedium über Querbohrungen (23) zunächst in die Auslaßventile (7) umgebende Mediumkammern (24) und dann in die Einlaßventile (8) umgebende Mediumkammern (25) strömt, von wo aus es in den Austrittskanal (11) gelangt.6. Multi-cylinder internal combustion engine according to claim 1, the cylinder head hanging and preferably V-shaped arranged inlet and outlet valves, characterized in that the supply channel (9) is arranged adjacent to the outlet valves (7) and the cooling medium via transverse bores (23) first in medium chambers (24) surrounding the outlet valves (7) and then flowing into medium chambers (25) surrounding the inlet valves (8), from where it reaches the outlet channel (11). 7. Mehrzylindrige Brennkraftmaschine nach Anspruch 1, deren Zylinder­laufbüchsen in Aufnahmen des Zylinderkurbelgehäuses eingesetzt sind, dadurch gekennzeichnet, daß die Zylinderlaufbüchsen (4, 5) benachbart dem Zylinderkopf (2) beginnend, über einen wesentlichen Teilbereich (Länge G) unmittelbar, jedoch mit geringem Abstand (26) aneinandergesetzt sind und dort im wesentlichen gleiche Wanddicken aufweisen und daß in einem daran anschließenden Bereich die Aufnahmen (29) des Zylinderkurbelgehäuses (3) verlaufen.7. Multi-cylinder internal combustion engine according to claim 1, the cylinder liners of which are inserted in receptacles of the cylinder crankcase, characterized in that the cylinder liners (4, 5) adjacent to the cylinder head (2) starting over a substantial portion (length G) directly, but at a short distance (26) are placed next to each other and have essentially the same wall thicknesses and that the receptacles (29) of the cylinder crankcase (3) run in a region adjoining them. 8. Mehrzylindrige Brennkraftmaschine nach Anspruch 7, dadurch gekenn­zeichnet, daß zwischen den Zylinderlaufbüchsen (4, 5), und zwar benachbart dem Zylinderkopf (2), eine durch Ausnehmungen (32, 33) der Zylinderlauf­büchsen (4, 5) gebildete Nut (30) vorgesehen ist, in die eine einstückige metallische Zylinderkopfdichtung (31) eingesetzt ist.8. Multi-cylinder internal combustion engine according to claim 7, characterized in that between the cylinder liners (4, 5), namely adjacent to the cylinder head (2), a groove (30) formed by recesses (32, 33) of the cylinder liners (4, 5) is provided, in which a one-piece metallic cylinder head gasket (31) is inserted. 9. Mehrzylindrige Brennkraftmaschine nach Anspruch 7, dadurch gekenn­zeichnet, daß die Zylinderlaufbüchsen (4, 5) an den einander zugekehrten Seiten Abflachungen (27, 28) aufweisen.9. Multi-cylinder internal combustion engine according to claim 7, characterized in that the cylinder liners (4, 5) on the mutually facing sides have flats (27, 28). 10. Mehrzylindrige Brennkraftmaschine nach Anspruch 9, dadurch gekenn­zeichnet, daß die Abflachungen (27, 28) durch Reduzierung der Wandstärke der jeweiligen Zylinderlaufbüchse (4 oder 5) gebildet werden.10. Multi-cylinder internal combustion engine according to claim 9, characterized in that the flats (27, 28) are formed by reducing the wall thickness of the respective cylinder liner (4 or 5). 11. Mehrzylindrige Brennkraftmaschine nach Anspruch 8, dadurch gekenn­zeichnet, daß die Nut (30) außerhalb der einander zugekehrten Seiten der Zylinderlaufbüchsen (4, 5) fortgeführt ist und dort durch eine Wand (34) des Zylinderkurbelgehäuses (3) und die jeweilige Ausnehmung (32 oder 33) der Zylinderlaufbüchsen (4, 5) gebildet wird.11. Multi-cylinder internal combustion engine according to claim 8, characterized in that the groove (30) outside the mutually facing sides of the cylinder liners (4, 5) is continued and there through a wall (34) of the cylinder crankcase (3) and the respective recess (32 or 33) of the cylinder liners (4, 5) is formed. 12. Mehrzylindrige Brennkraftmaschine nach Anspruch 11, dadurch gekenn­zeichnet, daß jede Zylinderlaufbüchse (5) benachbart der Ausnehmung (33) einen Kragen (35) aufweist, der an einer Abstützung (36) des Kurbelgehäuses (3) anliegt.12. Multi-cylinder internal combustion engine according to claim 11, characterized in that each cylinder liner (5) adjacent to the recess (33) has a collar (35) which rests on a support (36) of the crankcase (3). 13. Mehrzylindrige Brennkraftmaschine nach Anspruch 7, dadurch gekenn­zeichnet, daß die Aufnahmen (29) des Kurbelgehäuses (3) und die Wandstärken der an diese angrenzenden Zylinderlaufbüchsen (4, 5) im wesentlichen gleich sind.13. Multi-cylinder internal combustion engine according to claim 7, characterized in that the receptacles (29) of the crankcase (3) and the wall thicknesses of the cylinder liners (4, 5) adjoining these are essentially the same. 14. Mehrzylindrige Brennkraftmaschine nach den Ansprüchen 1 und 8, dadurch gekennzeichnet, daß die Zylinderkopfdichtung (31) mit Dichtabschnitten (37, 38) versehen ist, die zwischen Zylinderkopf (2) und Zylinderkurbelgehäuse (3) im Bereich des Zuführungskanals (9) und des Austrittskanals (11) wirksam sind.14. Multi-cylinder internal combustion engine according to claims 1 and 8, characterized in that the cylinder head gasket (31) is provided with sealing sections (37, 38) between the cylinder head (2) and the cylinder crankcase (3) in the region of the supply channel (9) and the Exit channel (11) are effective. 15. Mehrzylindrige Brennkraftmaschine nach Anspruch 14, dadurch gekenn­zeichnet, daß die Dichtabschnitte (37, 38) metallische Verlängerungen (39) der Zylinderkopfdichtung (31) aufweisen, die einen Dichtkörper (40) aus elastischem Werkstoff tragen.15. Multi-cylinder internal combustion engine according to claim 14, characterized in that the sealing sections (37, 38) have metallic extensions (39) of the cylinder head gasket (31) which carry a sealing body (40) made of elastic material. 16. Mehrzylindrige Brennkraftmaschine nach Anspruch 1, dadurch gekenn­zeichnet, daß der Zylinderkopf (2) und die Zylinderlaufbüchsen (4; 5) getrennt voneinander mit Kühlmedium versorgt werden.16. Multi-cylinder internal combustion engine according to claim 1, characterized in that the cylinder head (2) and the cylinder liners (4; 5) are supplied separately from one another with cooling medium. 17. Mehrzylindrige Brennkraftmaschine nach Anspruch 6, dadurch gekenn­zeichnet, daß das Volumen der Mediumkammern (24) der Auslaßventile (7) größer ist als das Volumen der Mediumkammern (25) der Einlaßventile (8).17. Multi-cylinder internal combustion engine according to claim 6, characterized in that the volume of the medium chambers (24) of the exhaust valves (7) is greater than the volume of the medium chambers (25) of the intake valves (8).
EP86114449A 1986-02-06 1986-10-18 Multi-cylinder internal combustion engine Expired - Lifetime EP0232467B1 (en)

Applications Claiming Priority (2)

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DE19863603674 DE3603674A1 (en) 1986-02-06 1986-02-06 MULTI-CYLINDER COMBUSTION ENGINE
DE3603674 1986-02-06

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EP0232467A2 true EP0232467A2 (en) 1987-08-19
EP0232467A3 EP0232467A3 (en) 1988-06-22
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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
DE3672812D1 (en) 1990-08-23
DE3603674C2 (en) 1988-02-25
EP0232467A3 (en) 1988-06-22
US4759317A (en) 1988-07-26
EP0232467B1 (en) 1990-07-18
ES2017616B3 (en) 1991-03-01
DE3603674A1 (en) 1987-08-13

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