EP0277446B1 - Internal-combustion engine provided with cylinder block cooling - Google Patents

Internal-combustion engine provided with cylinder block cooling Download PDF

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Publication number
EP0277446B1
EP0277446B1 EP87403006A EP87403006A EP0277446B1 EP 0277446 B1 EP0277446 B1 EP 0277446B1 EP 87403006 A EP87403006 A EP 87403006A EP 87403006 A EP87403006 A EP 87403006A EP 0277446 B1 EP0277446 B1 EP 0277446B1
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EP
European Patent Office
Prior art keywords
combustion engine
passage
internal combustion
cylinders
cylinder block
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.)
Expired - Lifetime
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EP87403006A
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German (de)
French (fr)
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EP0277446A1 (en
Inventor
Luc Schwab
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Automobiles Peugeot SA
Automobiles Citroen SA
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Automobiles Peugeot SA
Automobiles Citroen SA
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Publication of EP0277446A1 publication Critical patent/EP0277446A1/en
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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
    • F02F1/108—Siamese-type cylinders, i.e. cylinders cast together
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F2001/104—Cylinders; Cylinder heads  having cooling means for liquid cooling using an open deck, i.e. the water jacket is open at the block top face

Definitions

  • the present invention relates to internal combustion engines comprising several cylinders in line and in particular those of these engines which, in order to be as short as possible, have a small distance between cylinders.
  • the cylinders are formed in a cylinder block surmounted by a cylinder head and these cylinders are cooled by a coolant circuit comprising chambers arranged on either side of the line of cylinders and connected by passages in the walls separating two adjacent cylinders.
  • the cylinder block being made of cast metal, the passage formed in the wall separating two cylinders is obtained either by molding from a foundry core, or by machining.
  • neither the passage nor the wall separating two cylinders can be very thin, on the one hand taking into account the size of the core and the shrinkage of the metal during cooling after casting and, on the other hand, as regards the wall, because of the risks of porosity, especially near the upper part of the cylinders where the mechanical and thermal stresses are maximum.
  • the distance between two adjacent cylinders cannot be practically less than about one centimeter.
  • wall deformations frequently occur in the vicinity of the upper parts of the cylinders, in particular when the engine is heavily loaded, which is the case when it is supercharged.
  • the passage consists either of at least one borehole, necessarily of small diameter and providing only a small flow of liquid and consequently an insufficient heat exchange (document US-A-4,369,739) or in a slot extending perpendicular to the line of cylinders, this slot being milled from the face of the cylinder block facing the cylinder head.
  • a slot being located in the vicinity of the upper part of the cylinders, that is to say in the hottest zone and subjected to the highest mechanical stresses, weakens the wall in which it is formed.
  • the risks of deformation imply that the walls disposed on either side of the slot have a thickness of at least four millimeters, which again leads to a distance between two adjacent cylinders of at least one centimeter.
  • slots arranged in this way tend to scale up and are subjected to deposits of particles carried by the coolant, which progressively restrict the passage cross-section for this liquid.
  • the object of the invention is to propose an arrangement in which these various drawbacks are reduced or eliminated and which makes it possible to ensure effective cooling of the cylinders without weakening the partitions which separate them, or increasing the thickness of these partitions.
  • the subject of the invention is an internal combustion engine, comprising a cylinder block of cast metal delimiting several cylinders which are arranged in line and open out on one face of the cylinder block adjacent to a cylinder head itself fixed on the cylinder block, two adjacent cylinders being separated by a partition, the cylinder block also delimiting part of a coolant circuit and in particular chambers located on either side of the line of cylinders and at least one passage formed in said partition and connecting said chambers, at least one of said chambers located on one side of the line of cylinders opening onto said face of the cylinder block by a cavity and at least one conduit being drilled in said partition above passage, this conduit extending between said cavity and the chamber located on the other side of the line of cylinders, characterized in that the two chambers communicate respective nt with a part of the coolant circuit formed in the cylinder head by passages of restricted section, one of which is located between the cavity and the adjacent chamber, the passage connecting the two chambers came from the foundry and this passage and the duct
  • FIG. 1 a portion of a cylinder block 1 made of cast metal and which delimits several cylinders such as G, C 2 ( Figure 3), arranged in line.
  • This line is designated by the reference LL 'and corresponds to the trace on the plane of Figure 3, the plane containing the axes of the different cylinders.
  • the block 1 has a face 2 directed towards a cylinder head 3 fixed on the block by usual means.
  • a cylinder head gasket 4 is interposed in a known manner, between the cylinder block and the cylinder head.
  • a part 7, 8 of this cooling circuit is formed in the cylinder head.
  • a conduit 11 is drilled in the upper part of the partition 9 above the passage 10, this hole making the upper part of the chamber 6 communicate with a cavity 12 which opens onto the face 2 of the cylinder block and communicates with the chamber 5, preferably by means of an orifice 13 of restricted section.
  • the oblique orientation of the bore 11 is such that it can be machined from the upper face of the cylinder block. Its diameter can, for example, be of the order of 4 mm.
  • two conduits 11 can be drilled in the partition 9.
  • the upper edge 14 of the passage 10 is oblique and oriented approximately parallel to the bore 11.
  • the second chamber 6 communicates with the part 8 of the coolant circuit formed in the cylinder head via an orifice 15 of restricted section, this orifice like the orifice 13 having come from the foundry in the embodiment of the figures 1 to 3.
  • the cavity 12 into which opens the chamber 5 has a generally cylindrical shape and receives a cup 21 in which is formed a calibrated orifice 22.
  • the cup 21 can be fitted or screwed into the cavity 12 .
  • the cylinder head gasket 4 also comprises two orifices 23, 24 of restricted section which determine the cross-section between the parts of the cooling circuit formed in the cylinder block and in the cylinder head, respectively.
  • a spacer 31 from the foundry is provided in the middle part of the passage 10, so as to reinforce the partition 9 which separates the adjacent cylinders C1, C2.
  • the coolant flows, on the one hand, from the chamber 5 towards the cavity 12 through the orifice 13 or 22 of restricted section and, on the other hand, from the chamber 6 towards the cavity 12 through the bore 11, and towards the circuit 8 through the restricted passage 15 or 24.
  • a circulation of the coolant also occurs in the passage 10.
  • the various passages of restricted section are dimensioned so that the pressure drops which they provide entail an optimal distribution of the liquid flow rates in the passage 10 and in the bore 11 and, consequently, a sufficient heat exchange to cool the cylinders correctly.
  • the orifice 22 has a smaller section than that of the orifice 23 and larger than that of the orifice 24.

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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

La présente invention concerne les moteurs à combustion interne comportant plusieurs cylindres en ligne et en particulier ceux de ces moteurs qui pour avoir une longueur aussi réduite que possible présentent une faible distance entre cylindres.The present invention relates to internal combustion engines comprising several cylinders in line and in particular those of these engines which, in order to be as short as possible, have a small distance between cylinders.

Dans de tels moteurs, les cylindres sont ménagés dans un bloc-cylindres surmonté d'une culasse et ces cylindres sont refoidis par un circuit de liquide de refoidissement comportant des chambres disposées de part et d'autre de la ligne de cylindres et reliées par des passages ménagés dans les parois séparant deux cylindres adjacents.In such engines, the cylinders are formed in a cylinder block surmounted by a cylinder head and these cylinders are cooled by a coolant circuit comprising chambers arranged on either side of the line of cylinders and connected by passages in the walls separating two adjacent cylinders.

Le bloc-cylindres étant réalisé en métal coulé, le passage ménagé dans la paroi séparant deux cylindres est obtenu soit par moulage à partir d'un noyau de fonderie, soit par usinage.The cylinder block being made of cast metal, the passage formed in the wall separating two cylinders is obtained either by molding from a foundry core, or by machining.

Dans le premier cas ni le passage, ni la paroi séparant deux cylindres ne peuvent être très minces, d'une part compte tenu de la dimension du noyau et du retrait du métal lors du refroidissement après la coulée et, d'autre part, en ce qui concerne la paroi, à cause des risques de porosité, surtout à proximité de la partie supérieure des cylindres où les contraintes mécaniques et thermiques sont maximales.In the first case, neither the passage nor the wall separating two cylinders can be very thin, on the one hand taking into account the size of the core and the shrinkage of the metal during cooling after casting and, on the other hand, as regards the wall, because of the risks of porosity, especially near the upper part of the cylinders where the mechanical and thermal stresses are maximum.

Il en résulte que la distance entre deux cylindres adjacents ne peut pratiquement être inférieure à environ un centimètre. De plus, des déformations de paroi se produisent fréquemment au voisinage des parties supérieures des cylindres, notamment lorsque le moteur est fortement chargé ce qui est le cas lorsqu'il est suralimenté.As a result, the distance between two adjacent cylinders cannot be practically less than about one centimeter. In addition, wall deformations frequently occur in the vicinity of the upper parts of the cylinders, in particular when the engine is heavily loaded, which is the case when it is supercharged.

Dans le second cas, le passage consiste soit en au moins un perçage, nécessairement de petit diamètre et ne procurant qu'un faible écoulement de liquide et par conséquent un échange thermique insuffisant (document US-A-4 369 739) soit en une fente s'étendant perpendiculairement à la ligne de cylindres, cette fente étant fraisée à partir de la face du bloc-cylindres dirigée vers la culasse. Une telle fente étant située au voisinage de la partie supérieure des cylindres, c'est-à-dire dans la zone la plus chaude et soumise aux plus fortes contraintes mécaniques, affaiblit la paroi dans laquelle elle est ménagée. Les risques de déformation impliquent que les parois disposées de part et d'autre de la fente présentent une épaisseur d'au moins quatre millimètres, ce qui conduit à nouveau à une distance entre deux cylindres adjacents d'au moins un centimètre. Pour pouvoir réduire au moins légèrement cette distance, il est nécessaire d'insérer une pièce métallique de renfort dans la fente, ce qui est délicat à réaliser de façon fiable. On constate de plus que des fentes agencées de cette façon ont tendance à s'entartrer et sont soumises à des dépôts de particules véhiculées par le liquide de refoidissement, qui restreignent progressivement la section de passage pour ce liquide.In the second case, the passage consists either of at least one borehole, necessarily of small diameter and providing only a small flow of liquid and consequently an insufficient heat exchange (document US-A-4,369,739) or in a slot extending perpendicular to the line of cylinders, this slot being milled from the face of the cylinder block facing the cylinder head. Such a slot being located in the vicinity of the upper part of the cylinders, that is to say in the hottest zone and subjected to the highest mechanical stresses, weakens the wall in which it is formed. The risks of deformation imply that the walls disposed on either side of the slot have a thickness of at least four millimeters, which again leads to a distance between two adjacent cylinders of at least one centimeter. To be able to reduce this distance at least slightly, it is necessary to insert a metal reinforcement piece into the slot, which is difficult to achieve reliably. It can also be seen that slots arranged in this way tend to scale up and are subjected to deposits of particles carried by the coolant, which progressively restrict the passage cross-section for this liquid.

L'invention a pour but de proposer un agencement dans lequel ces divers inconvénients soient réduits ou supprimés et qui permette d'assurer un refroidissement efficace des cylindres sans affaiblir les cloisons qui les séparent, ni augmenter l'épaisseur de ces cloisons.The object of the invention is to propose an arrangement in which these various drawbacks are reduced or eliminated and which makes it possible to ensure effective cooling of the cylinders without weakening the partitions which separate them, or increasing the thickness of these partitions.

A cet effet l'invention a pour objet un moteur à combustion interne, comprenant un bloc-cylindres en métal coulé délimitant plusieurs cylindres qui sont disposés en ligne et débouchent sur une face du bloc- cylindres adjacente à une culasse elle-même fixée sur le bloc-cylindres, deux cylindres adjacents étant séparés par une cloison, le bloc-cylindres délimitant également une partie d'un circuit de liquide de refroidissement et notamment des chambres situées de part et d'autre de la ligne de cylindres et au moins un passage ménagé dans ladite cloison et reliant lesdites chambres, au moins l'une desdites chambres située d'un côté de la ligne de cylindres débouchant sur ladite face du bloc-cylindres par une cavité et au moins un conduit étant percé dans ladite cloison au-dessus du passage, ce conduit s'étendant entre ladite cavité et la chambre située de l'autre côté de la ligne de cylindres, caractérisé en ce que les deux chambres communiquent respectivement avec une partie du circuit de liquide de refroidissement ménagée dans la culasse par des passages de section restreinte, dont l'un est situé entre la cavité et la chambre adjacente, le passage reliant les deux chambres est venu de fonderie et ce passage et le conduit débouchent de part et d'autre du passage de section restreinte situé entre la cavité et la chambre adjacente.To this end, the subject of the invention is an internal combustion engine, comprising a cylinder block of cast metal delimiting several cylinders which are arranged in line and open out on one face of the cylinder block adjacent to a cylinder head itself fixed on the cylinder block, two adjacent cylinders being separated by a partition, the cylinder block also delimiting part of a coolant circuit and in particular chambers located on either side of the line of cylinders and at least one passage formed in said partition and connecting said chambers, at least one of said chambers located on one side of the line of cylinders opening onto said face of the cylinder block by a cavity and at least one conduit being drilled in said partition above passage, this conduit extending between said cavity and the chamber located on the other side of the line of cylinders, characterized in that the two chambers communicate respective nt with a part of the coolant circuit formed in the cylinder head by passages of restricted section, one of which is located between the cavity and the adjacent chamber, the passage connecting the two chambers came from the foundry and this passage and the duct open on either side of the passage of restricted section located between the cavity and the adjacent chamber.

L'invention va être décrite plus en détail ci-dessous en se référant au dessin annexé, donné à titre d'exemple et sur lequel:

  • - la figure 1 est une vue en coupe par un plan perpendiculaire à la ligne de cylindres, dans la zone située entre deux cyclindres adjacents, d'un premier mode de réalisation de l'invention;
  • - Les figures 2 et 3 sont respectivement des vues en coupe suivant les lignes 2-2 et 3-3 de la figure 1 ;
  • - Les figures 4 et 5 sont deux vues analogues à celle de la figure 1 de deux variantes ; et
  • - La figure 6 est une vue en coupe suivant la ligne 6-6 de la figure 5.
The invention will be described in more detail below with reference to the attached drawing, given by way of example and in which:
  • - Figure 1 is a sectional view through a plane perpendicular to the line of cylinders, in the area between two adjacent cylinders, of a first embodiment of the invention;
  • - Figures 2 and 3 are respectively sectional views along lines 2-2 and 3-3 of Figure 1;
  • - Figures 4 and 5 are two views similar to that of Figure 1 of two variants; and
  • - Figure 6 is a sectional view along line 6-6 of Figure 5.

On voit sur la figure 1 une partie d'un bloc-cylindres 1 réalisé en métal coulé et qui délimite plusieurs cylindres tels que G, C2 (figure 3), disposés en ligne. Cette ligne est désignée par la référence L-L' et correspond à la trace sur le plan de la figure 3, du plan contenant les axes des différents cylindres. Le bloc 1 comporte une face 2 dirigée vers une culasse 3 fixée sur le bloc par des moyens habituels. Un joint de culasse 4 est interposé de façon connue, entre le bloc-cylindres et la culasse.We see in Figure 1 a portion of a cylinder block 1 made of cast metal and which delimits several cylinders such as G, C 2 (Figure 3), arranged in line. This line is designated by the reference LL 'and corresponds to the trace on the plane of Figure 3, the plane containing the axes of the different cylinders. The block 1 has a face 2 directed towards a cylinder head 3 fixed on the block by usual means. A cylinder head gasket 4 is interposed in a known manner, between the cylinder block and the cylinder head.

Dans le bloc-cylindres sont ménagées de part et d'autre de la ligne de cylindres des chambres 5 et 6 faisant partie d'un circuit de liquide de refroidissement. De même, une partie 7, 8 de ce circuit de refroidissement est ménagée dans la culasse.In the cylinder block are formed on either side of the line of cylinders of the chambers 5 and 6 forming part of a coolant circuit. Similarly, a part 7, 8 of this cooling circuit is formed in the cylinder head.

Deux cylindres adjacents sont séparés par une cloison 9 réalisée avec une épaisseur aussi faible que possible et dans laquelle est venu de fonderie un passage 10 qui fait communiquer les deux chambres 5 et 6.Two adjacent cylinders are separated by a partition 9 made as thin as possible and in which the passageway 10 has come from the foundry which makes the two chambers 5 and 6 communicate.

Suivant l'invention, un conduit 11 est percé dans la partie supérieure de la cloison 9 au dessus du passage 10, ce perçage faisant communiquer la partie supérieure de la chambre 6 avec une cavité 12 qui débouche sur la face 2 du bloc-cylindres et communique avec la chambre 5, de préférence par l'intermédiaire d'un orifice 13 de section restreinte. L'orientation oblique du perçage 11 est telle qu'il peut être usiné à partir de la face supérieure du bloc-cylindres. Son diamètre peut, par exemple être de l'ordre de 4 mm. En variante, deux conduits 11 peuvent être percés dans la cloison 9.According to the invention, a conduit 11 is drilled in the upper part of the partition 9 above the passage 10, this hole making the upper part of the chamber 6 communicate with a cavity 12 which opens onto the face 2 of the cylinder block and communicates with the chamber 5, preferably by means of an orifice 13 of restricted section. The oblique orientation of the bore 11 is such that it can be machined from the upper face of the cylinder block. Its diameter can, for example, be of the order of 4 mm. As a variant, two conduits 11 can be drilled in the partition 9.

De préférence, le bord supérieur 14 du passage 10 est oblique et orienté à peu près parallèlement au perçage 11.Preferably, the upper edge 14 of the passage 10 is oblique and oriented approximately parallel to the bore 11.

La deuxième chambre 6 communique avec la partie 8 du circuit de liquide de refroidissement ménagée dans la culasse par l'intermédiaire d'un orifice 15 de section restreinte, cet orifice comme l'orifice 13 étant venu de fonderie dans le mode de réalisation des figures 1 à 3.The second chamber 6 communicates with the part 8 of the coolant circuit formed in the cylinder head via an orifice 15 of restricted section, this orifice like the orifice 13 having come from the foundry in the embodiment of the figures 1 to 3.

Dans le mode de réalisation de la figure 4, la cavité 12 dans laquelle débouche la chambre 5 a une forme générale cylindrique et reçoit une coupelle 21 dans laquelle est ménagée un orifice calibré 22. La coupelle 21 peut être emmanchée ou vissée dans la cavité 12.In the embodiment of Figure 4, the cavity 12 into which opens the chamber 5 has a generally cylindrical shape and receives a cup 21 in which is formed a calibrated orifice 22. The cup 21 can be fitted or screwed into the cavity 12 .

De plus, dans ce mode de réalisation, le joint de culasse 4 comporte également deux orifices 23, 24 de section restreinte qui déterminent la section de passage entre les parties du circuit de refroidissement ménagées dans le bloc-cylindres et dans la culasse, respectivement.In addition, in this embodiment, the cylinder head gasket 4 also comprises two orifices 23, 24 of restricted section which determine the cross-section between the parts of the cooling circuit formed in the cylinder block and in the cylinder head, respectively.

Dans la variante des figures 5 et 6, une entretoise 31 venue de fonderie est ménagée dans la partie médiane du passage 10, de façon à renforcer la cloison 9 qui sépare les cylindres adjacents C1, C2.In the variant of FIGS. 5 and 6, a spacer 31 from the foundry is provided in the middle part of the passage 10, so as to reinforce the partition 9 which separates the adjacent cylinders C1, C2.

Le fonctionnement de l'agencement que l'on vient de dédrire est le suivant:The operation of the arrangement that we have just described is as follows:

En remontant du bloc-cylindres 1 vers la culasse 3, le liquide de refroidissement s'écoule, d'une part, de la chambre 5 vers la cavité 12 par l'orifice 13 ou 22 de section restreinte et, d'autre part, de la chambre 6 vers la cavité 12 par le perçage 11, et vers le circuit 8 par le passage restreint 15 ou 24. De plus, une circulation du liquide de refroidissement se produit aussi dans le passage 10.Going up from the cylinder block 1 towards the cylinder head 3, the coolant flows, on the one hand, from the chamber 5 towards the cavity 12 through the orifice 13 or 22 of restricted section and, on the other hand, from the chamber 6 towards the cavity 12 through the bore 11, and towards the circuit 8 through the restricted passage 15 or 24. In addition, a circulation of the coolant also occurs in the passage 10.

Les divers passages de section restreinte sont dimensionnés de façon que les pertes de charge qu'ils procurent entrainent une répartition optimale des débits de liquide dans le passage 10 et dans le perçage 11 et, par suite, un échange thermique suffisant pour refroidir correctement les cylindres. C'est ainsi que suivant la réalisation représentée, l'orifice 22 a une section plus faible que celle de l'orifice 23 et plus importante que celle de l'orifice 24.The various passages of restricted section are dimensioned so that the pressure drops which they provide entail an optimal distribution of the liquid flow rates in the passage 10 and in the bore 11 and, consequently, a sufficient heat exchange to cool the cylinders correctly. . Thus, according to the embodiment shown, the orifice 22 has a smaller section than that of the orifice 23 and larger than that of the orifice 24.

Cet agencement offre les avantages suivants:

  • - il procure un refroidissement efficace, comme cela a été indiqué ci-dessus ;
  • - la cloison séparant les cylindres peut être relativement mince et conserver une épaisseur inférieure à un centimètre, tout en présentant une bonne tenue mécanique grâce au fait qu'elle est pleine au voisinage de la face 2 et que le perçage 11 ne contribue que faiblement à réduire sa section. Or il est important de conserver une résistance suffisante à la cloison à proximité de la face 2, car c'est dans cette zone que les contraintes sont les plus importantes ;
  • - les passages de section restreinte et le perçage 11 risquent peu de s'entartrer ou d'être encombrés par des particules car le débit du liquide qui y circule est relativement important. Il en est de même pour le passage 10, notamment grâce à son éloignement de la zone la plus chaude, proche de la face 2.
This arrangement offers the following advantages:
  • - it provides effective cooling, as indicated above;
  • - The partition separating the cylinders can be relatively thin and keep a thickness of less than one centimeter, while exhibiting good mechanical strength thanks to the fact that it is full in the vicinity of face 2 and that the bore 11 contributes only slightly to reduce its section. However, it is important to maintain sufficient resistance to the partition near face 2, because it is in this area that the stresses are greatest;
  • - The passages of restricted section and the bore 11 are unlikely to scale up or be clogged with particles because the flow rate of the liquid which circulates therein is relatively large. The same is true for passage 10, in particular thanks to its distance from the hottest zone, close to face 2.

Claims (10)

1. An internal combustion engine comprising a cylinder block (1) of cast metal, defining a plurality of cylinders (Ci, C2) which are arranged in a line and which open onto a surface (2) of the cylinder block adjacent to a cylinder head (3) fixed on the cylinder block, two adjacent cylinders being separated by a partition wall (9), the cylinder block also defining a part of a cooling liquid circuit and especially chambers (5, 6) situated on either side of the line of cylinders (L, L') and at least one passage (10), provided in said partition wall (9) and interconnecting said chambers (5, 6), at least one (5) of said chambers situated on one side of the line of cylinders, opening on said surface (2) of the cylinder block by means of a cavity (12) and at least one conduit (11) being provided in said partition wall above the passage (10), this conduit extending between said cavity (12) and the chamber (6) situated on the other side of the line of cylinders, characterised in that the two chambers (5, 6) communicate respectively with a part (7, 8) of the cooling liquid circuit provided in the cylinder head by passages (13, 15, 22, 23, 24) of small section, one of which (13, 22) is situated between the cavity (12) and the adjacent chamber (5), the passage (10) interconnecting the two chambers (5, 6) being obtained by foundry casting, and this passage (10) and the conduit (11) opening on the respective sides of the passage (13, 22) of small section situated between the cavity (12) and the adjacent chamber (5).
2. Internal combustion engine according to claim 1, characterised in that said passages (13, 15) are obtained by casting.
3. Internal combustion engine according to claim 1, characterised in that a cylinder head gasket (4) is interposed between the two facing surfaces of the cylinder block (1) and the cylinder head (3), this gasket comprising two calibrated orifices (23, 24) connecting the liquid circuit (7, 8) provided in the cylinder head, respectively to said cavity (12) and to the chamber (6) disposed on the other side of the line of cylinders.
4. Internal combustion engine according to claim 3, characterised in that said orifice (24) adjacent to the chamber (6) in which said conduit (11) opens has a smaller section than that of the other orifice (23).
5. Internal combustion engine according to claims 1 and 4, characterised in that the passage (22) disposed between the chamber (5) and the adjacent cavity (12) has a section which is intermediate between those of the two orifices (23, 24).
6. Internal combustion engine according to claim 1, characterised in that said cavity (12) is obtained by casting.
7. Internal combustion engine according to claim 1, characterised in that said cavity (12) is a cylindrical housing in which is mounted a cup (21) defining a small-section orifice (22).
8. Internal combustion engine according to claim 1, characterised in that at least one cross-piece (31) is provided in the passage (10) interconnecting the two chambers (5, 6).
9. Internal combustion engine according to claim 1, characterised in that the conduit (11) is drilled from the surface (2) of the cylinder block adjacent to the cylinder head and extends obliquely from this surface.
10. Internal combustion engine according to claim 9, characterised in that the passage (10) interconnecting the two chambers (5, 6) has an upper edge (14) substantially parallel to the direction of the conduit (11).
EP87403006A 1987-01-09 1987-12-29 Internal-combustion engine provided with cylinder block cooling Expired - Lifetime EP0277446B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8700174 1987-01-09
FR8700174A FR2609501B1 (en) 1987-01-09 1987-01-09 INTERNAL COMBUSTION ENGINE PROVIDED WITH IMPROVED MEANS FOR COOLING THE CYLINDER BLOCK

Publications (2)

Publication Number Publication Date
EP0277446A1 EP0277446A1 (en) 1988-08-10
EP0277446B1 true EP0277446B1 (en) 1990-10-24

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EP87403006A Expired - Lifetime EP0277446B1 (en) 1987-01-09 1987-12-29 Internal-combustion engine provided with cylinder block cooling

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EP (1) EP0277446B1 (en)
JP (1) JPS63176648A (en)
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JP3077452B2 (en) * 1993-06-07 2000-08-14 トヨタ自動車株式会社 Cylinder block for internal combustion engine
AT2435U1 (en) * 1997-04-09 1998-10-27 Avl List Gmbh PISTON PISTON ENGINE
MY122487A (en) 2000-12-21 2006-04-29 Petroliam Nasional Berhad Interbore cooling system
US6988480B2 (en) * 2002-09-16 2006-01-24 Caterpillar Inc. Cylinder block for an internal combustion engine having a locally thickened end wall
DE10326520B4 (en) * 2003-06-12 2014-06-05 Bayerische Motoren Werke Aktiengesellschaft Crankcase for an internal combustion engine
DE10340157B4 (en) * 2003-09-01 2008-10-02 Audi Ag Device for media guidance in a cylinder crankcase
CA2550033A1 (en) * 2003-12-18 2005-07-07 Tenedora Nemak, S.A. De C.V. Method and apparatus for manufacturing strong thin-walled castings
US20050247428A1 (en) * 2004-04-20 2005-11-10 Tenedora Nemak, S.A. De C.V. Method and apparatus for casting aluminum engine blocks with cooling liquid passage in ultra thin interliner webs
FR2869356B1 (en) * 2004-04-26 2008-07-11 Renault Sas ENGINE COOLING PIPE
DE102008004082A1 (en) 2008-01-12 2008-09-04 Daimler Ag Cooling arrangement for cooling a cylinder crankcase and a cylinder head of a combustion engine comprises a direct connecting channel arranged between a mouth region of a cooling channel and a cooling water chamber of a cylinder head
US9470176B2 (en) * 2014-08-01 2016-10-18 Ford Global Technologies, Llc Bore bridge and cylinder cooling
US10371087B2 (en) 2015-08-11 2019-08-06 Exco Engineering Die cast closed deck engine block manufacture

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EP0277446A1 (en) 1988-08-10
US4850312A (en) 1989-07-25
DE3765771D1 (en) 1990-11-29
FR2609501B1 (en) 1991-01-11
JPS63176648A (en) 1988-07-20
FR2609501A1 (en) 1988-07-15

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