EP3008306B1 - Cylinder block having a widened coolant inlet - Google Patents

Cylinder block having a widened coolant inlet Download PDF

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Publication number
EP3008306B1
EP3008306B1 EP14731756.4A EP14731756A EP3008306B1 EP 3008306 B1 EP3008306 B1 EP 3008306B1 EP 14731756 A EP14731756 A EP 14731756A EP 3008306 B1 EP3008306 B1 EP 3008306B1
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EP
European Patent Office
Prior art keywords
cylinder block
circuit
coolant
inlet
cylinder
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EP14731756.4A
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German (de)
French (fr)
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EP3008306A1 (en
Inventor
Herve OSMONT
Christophe CLASADONTE
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PSA Automobiles SA
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PSA Automobiles SA
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Publication of EP3008306A1 publication Critical patent/EP3008306A1/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
    • 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
    • F01P2003/021—Cooling cylinders

Definitions

  • the present invention relates to a cylinder block having an enlarged inlet for its internal coolant circuit, this cylinder housing being intended to equip the internal combustion engines including those of a motor vehicle.
  • An internal combustion engine gives off heat during its operation and therefore needs to be cooled. This is done by integrating an internal circuit of coolant, the coolant being advantageously water-based.
  • a crankcase comprises cylinders serving as combustion chambers of the engine which heat up in operation.
  • the internal coolant circuit has at least one coolant chamber, preferably one liquid chamber per cylinder. The liquid flows through this or these chambers by performing a heat exchange with heat removal out of the cylinder block but also a standardization of temperatures inside the cylinder block.
  • the coolant chamber or chambers are thus arranged close to a cylinder so as to circulate the cooling liquid close to it.
  • the internal coolant circuit also has an inlet and a coolant outlet, the inlet introducing into the cylinder block a coolant at a lower temperature than that of the coolant discharged through the outlet.
  • the flow of the coolant through the internal circuit in the cylinder block is important to ensure sufficient cooling of the combustion chamber or chambers in the crankcase. A large flow is favored by a wide inlet of the cooling circuit.
  • the inlet of the internal coolant circuit in the cylinder block is housed in a receiving element forming part of the cylinder block and intended to receive inside an external coolant supply, for example by insertion into this element receiving an output of an external coolant circuit that includes a pump.
  • the internal configuration that must take the receiving element of the external circuit can reduce the size of the input of the internal circuit and thus the flow of coolant in the internal circuit.
  • the section of the input may not be sufficient to ensure the passage of the flow created by the pump of the external circuit.
  • the coolant inlet should have a sufficient section in the crankcase to supply liquid to the engine with a variable-flow coolant pump, even for the highest flow rate of the pump.
  • One possibility would be to shift the receiving element into a place where it could offer more area to the input of the internal circuit or to increase the dimensions of the receiving element.
  • a cylinder block has manufacturing constraints that must be respected and that do not allow to make such changes on the cylinder block.
  • the document EP-B-0 851 109 discloses a coolant-cooled type internal combustion engine comprising a cylinder located in the engine crankcase and an internal coolant circuit integrated in the crankcase. This internal circuit includes a portion surrounding the cylinder and thus forming a coolant chamber.
  • the input of this circuit is a through hole provided at the outer wall of the motor facing the internal circuit.
  • the object of the present invention is, on the one hand, to design a cylinder block having an inlet for its coolant circuit section sufficiently large to allow the passage of the entire fluid of cooling that sends the pump of the external circuit and, secondly, that this adaptation is compatible with the manufacturing process of the cylinder block and constraints that the outer shape of the cylinder block must comply.
  • a combustion engine cylinder block having at least one cylinder and incorporating an internal circuit of coolant, the internal circuit having an inlet, an outlet and at least one chamber of liquid cooling device arranged near said at least one cylinder so as to circulate the cooling liquid in the vicinity of said at least one cylinder, the inlet of said circuit being formed through an inner housing defined by a receiving element forming part of the cylinder block and intended to receive an external supply of cooling liquid, characterized in that the inner housing is provided with a protuberance or local modification for increasing the passage area of the inlet of the internal cooling circuit.
  • protuberance and local modification are to be understood in the broad sense as any modification in the wall of the housing which increases the passage section of the inlet of the cooling circuit opening into said housing.
  • the technical effect obtained is the increase of the passage section of the inlet of the internal coolant circuit, this in a simple manner and without the need to change completely the manufacturing process of the crankcase or the configuration of the crankcase. cylinder, its outer shape and the positioning of the various parts of the cylinder block remaining unchanged.
  • the inner housing of the receiving element is cylindrical and the protuberance or local modification is a flat in the cylindrical wall of said element at the input of the circuit.
  • the wall of the housing is modified to locally not be cylindrical but have a right side that will expand the inlet section of the cooling fluid.
  • the housing is according to the invention the housing of a pump for the recirculation of coolant. It can therefore be closed at one of its ends.
  • the inner housing of the receiving element is cylindrical while being closed at one of its ends, the inlet of the internal circuit having a portion of passage made on the edge of the cylinder, the protuberance lying at this passage portion and having an opening extending said passage portion.
  • the protuberance is substantially in the form of a hollow rectangular parallelepiped resting on the closed end of the inner housing by one of its faces while its opposite face has the opening extending said passage portion.
  • the protuberance and the closed end are of the same holding.
  • the present invention also relates to an assembly of an external coolant circuit and a cylinder block, the external cooling circuit being connected to the internal circuit of the coolant of the cylinder block and comprising a pump for the circulation of the coolant. cooling in its interior and in the internal circuit of the cylinder block, characterized in that the cylinder block is as previously mentioned.
  • the present invention relates to a motor vehicle, characterized in that it comprises such an assembly of a coolant circuit and a cylinder block.
  • the present invention relates to a method of manufacturing such a cylinder block being carried out by molding in a mold, characterized in that the part of the mold corresponding to the inner housing of the receiving element of the cylinder block comprises a re-entrant shape corresponding to the protuberance for increasing the surface of the inlet passage of the internal circuit of coolant.
  • the re-entrant form is a flat part.
  • the flat is disposed on two complementary parts of the mold.
  • the method is a process for molding under pressure or by gravity.
  • the receiving element 2 of the cylinder block 1 is shown separately from the rest of the cylinder block 1. This receiving element however forms an integral part of the cylinder block 1 as can be seen in FIG. figure 3 .
  • this figure shows, for a combustion engine cylinder casing 1, the receiving element 2 of the output of an external coolant circuit excluding the remainder of the cylinder block 1, this receiving element being in conformity with the state of the art.
  • the external coolant circuit serves as external coolant supply of the cylinder block 1, the cooling liquid being advantageously water-based with or without additive.
  • the cylinder block 1 integrates an internal coolant circuit, this internal circuit having an inlet 3a and a liquid passage outlet and at least one coolant chamber disposed near said at least one cylinder. This makes it possible to circulate the coolant in the vicinity of the at least one cylinder for cooling it.
  • the receiving element 2 has a receiving housing 2a in its interior.
  • This receiving housing 2a may advantageously be of substantially cylindrical shape being closed at one of its ends 5.
  • the housing 2a receives the output of the external cooling liquid circuit and communicates it with the internal circuit of the internal cooling liquid to the housing cylinder via its entry 3a passage.
  • the entry 3a passage through the housing 2a to open inside the cylinder block 1 and communicate with the rest of the internal circuit of coolant to the cylinder block 1.
  • the slice of the cylinder forming the receiving housing 2a and its curvature limit the dimensions of the inlet 3a passage, which is very disadvantageous, the flow created by a pump disposed in the external cooling fluid circuit being reduced during the passage of the fluid through this inlet 3a.
  • FIG. 2 which illustrates a cylinder block 1 according to the present invention
  • the outer dimensions of the receiving member 2 and the cylinder block 1 are retained.
  • the inner receiving housing 2a which generally retains its shape, advantageously cylindrical, with the difference that the receiving housing 2a has a protuberance 4 to increase the surface of the inlet 3 passage of the circuit internal cooling in the cylinder block 1.
  • the protuberance 4 is advantageously at this passage portion and has a passage opening 6 extending said portion of passage.
  • the protuberance 4 is substantially in the form of a hollow rectangular parallelepiped resting on the closed end 5 of the receiving housing 2a inside by one of its faces while its opposite face has the opening 6 extending the passage portion through the edge of the cylinder formed by the receiving housing 2a.
  • the protuberance 4 and the closed end 5 of the receiving housing 2a inside the receiving element 2 are in the same holding.
  • Such a protuberance 4 may make it possible to increase the passage section of the inlet 3 by 10 to 50%, for example by making it, for example, pass from a surface area of 500 mm 2 obtained according to the state of the art. at an area of 687 mm 2 according to the present invention.
  • the figure 3 allows to see the positioning of the receiving element 2 on the cylinder block 1, the receiving housing 2a inside this receiving element 2 being provided with an enlarged inlet formed in the protuberance 4 at the passage portion shown in FIG. figure 1 and having an opening 6 extending said passage portion.
  • the invention also relates to a method of manufacturing a cylinder block 1 made by molding in a mold.
  • the part of the mold corresponding to the inner housing 2a of the receiving element 2 forming part of the cylinder block 1 comprises a re-entrant shape corresponding to the protuberance 4 making it possible to increase the surface area of the passage entrance of the internal coolant circuit. .
  • This re-entrant shape makes it possible to obtain the creation of the protuberance 4 during molding.
  • the reentrant form is in the form of a flat.
  • the mold is in several parts and the flat is disposed on two complementary parts of the mold.
  • the molding process of a cylinder block is usually an underpressure molding process.
  • the presence of a protuberance 4 in the receiving housing 2a inside the receiving part 2 of the cylinder block 1 keeps this type of manufacturing process.
  • the molding process can also be performed by gravity.
  • the invention also relates to an assembly of an external coolant circuit and a cylinder block 1, the external cooling circuit being connected to the internal coolant circuit of the cylinder block 1 and comprising a pump for the circulation of the coolant in its interior and in the internal circuit of the cylinder block 1, the cylinder block being as previously mentioned.
  • the invention finally relates to a motor vehicle comprising such a set of a coolant circuit and a cylinder block 1.
  • the present invention allows an optimization of the passage section of the inlet of the internal coolant circuit in the cylinder block, the element added to increase the passage section, that is to say the protuberance, having a good thermomechanical behavior and therefore good durability in operation.

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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 un carter cylindre présentant une entrée élargie pour son circuit interne de liquide de refroidissement, ce carter cylindre étant destiné à équiper les moteurs à combustion interne notamment ceux d'un véhicule automobile.The present invention relates to a cylinder block having an enlarged inlet for its internal coolant circuit, this cylinder housing being intended to equip the internal combustion engines including those of a motor vehicle.

Un moteur à combustion interne dégage de la chaleur lors de son fonctionnement et a besoin en conséquence d'être refroidi. Ceci est fait en lui intégrant un circuit interne de liquide de refroidissement, le liquide de refroidissement étant avantageusement à base d'eau.An internal combustion engine gives off heat during its operation and therefore needs to be cooled. This is done by integrating an internal circuit of coolant, the coolant being advantageously water-based.

Un carter cylindre comprend des cylindres servant de chambres de combustion du moteur qui s'échauffent en fonctionnement. Le circuit interne de liquide de refroidissement présente au moins une chambre de liquide de refroidissement, avantageusement une chambre de liquide par cylindre. Le liquide circule à travers cette ou ces chambres en réalisant un échange thermique avec évacuation de la chaleur hors du carter cylindre mais aussi une uniformisation des températures à l'intérieur du carter cylindre.A crankcase comprises cylinders serving as combustion chambers of the engine which heat up in operation. The internal coolant circuit has at least one coolant chamber, preferably one liquid chamber per cylinder. The liquid flows through this or these chambers by performing a heat exchange with heat removal out of the cylinder block but also a standardization of temperatures inside the cylinder block.

La ou les chambres de liquide de refroidissement sont donc disposées à proximité d'un cylindre de façon à faire circuler le liquide de refroidissement à proximité de celui-ci. Le circuit interne de liquide de refroidissement présente aussi une entrée et une sortie de liquide de refroidissement, l'entrée introduisant dans le carter cylindre un liquide de refroidissement à une température moindre que celle du liquide de refroidissement évacué par la sortie.The coolant chamber or chambers are thus arranged close to a cylinder so as to circulate the cooling liquid close to it. The internal coolant circuit also has an inlet and a coolant outlet, the inlet introducing into the cylinder block a coolant at a lower temperature than that of the coolant discharged through the outlet.

Le débit du liquide de refroidissement par le circuit interne dans le carter cylindre est important pour garantir un refroidissement suffisant de la ou des chambres de combustion dans le carter cylindre. Un débit important est favorisé par une entrée large du circuit de refroidissement.The flow of the coolant through the internal circuit in the cylinder block is important to ensure sufficient cooling of the combustion chamber or chambers in the crankcase. A large flow is favored by a wide inlet of the cooling circuit.

L'entrée du circuit interne de liquide de refroidissement dans le carter cylindre est logée dans un élément de réception faisant partie du carter cylindre et destiné à recevoir en son intérieur une alimentation externe en liquide de refroidissement, par exemple par l'insertion dans cet élément de réception d'une sortie d'un circuit externe de liquide de refroidissement qui comprend une pompe.The inlet of the internal coolant circuit in the cylinder block is housed in a receiving element forming part of the cylinder block and intended to receive inside an external coolant supply, for example by insertion into this element receiving an output of an external coolant circuit that includes a pump.

La configuration interne que doit prendre l'élément de réception du circuit externe peut réduire la dimension de l'entrée du circuit interne et donc le débit de liquide de refroidissement dans le circuit interne.The internal configuration that must take the receiving element of the external circuit can reduce the size of the input of the internal circuit and thus the flow of coolant in the internal circuit.

Par exemple, la section de l'entrée peut ne pas être suffisante pour pouvoir assurer le passage du débit créé par la pompe du circuit externe. Il convient que l'entrée de liquide de refroidissement présente une section suffisante dans le carter cylindre pour alimenter le moteur en liquide avec une pompe à liquide de refroidissement à débit variable, ceci même pour le plus fort des débits de la pompe.For example, the section of the input may not be sufficient to ensure the passage of the flow created by the pump of the external circuit. The coolant inlet should have a sufficient section in the crankcase to supply liquid to the engine with a variable-flow coolant pump, even for the highest flow rate of the pump.

Une possibilité serait de décaler l'élément de réception dans un endroit dans lequel il pourrait offrir plus de surface à l'entrée du circuit interne ou d'augmenter les dimensions de l'élément de réception.One possibility would be to shift the receiving element into a place where it could offer more area to the input of the internal circuit or to increase the dimensions of the receiving element.

Ceci n'est pas toujours possible compte tenu du manque de place sous capot dans un véhicule automobile, ceci le plus souvent par présence d'un autre élément comme par exemple une ou des vis de fixation de la culasse ou pour des contraintes de montage, par exemple une bride de serrage posée sur le carter cylindre sur une ligne d'usinage, etc.This is not always possible given the lack of space under the bonnet in a motor vehicle, this most often by the presence of another element such as for example one or bolts for fixing the cylinder head or for mounting constraints, for example a clamping flange placed on the cylinder block on a machining line, etc.

D'autre part, un carter cylindre présente des contraintes de fabrication qu'on est tenu de respecter et qui ne permettent pas d'effectuer de tels changements sur le carter cylindre.On the other hand, a cylinder block has manufacturing constraints that must be respected and that do not allow to make such changes on the cylinder block.

Le document EP-B-0 851 109 décrit un moteur à combustion interne du type à refroidissement par liquide de refroidissement comprenant un cylindre situé dans le carter cylindre du moteur et un circuit interne de liquide de refroidissement intégré dans le carter cylindre. Ce circuit interne comprend une partie entourant le cylindre et formant donc une chambre de liquide de refroidissement.The document EP-B-0 851 109 discloses a coolant-cooled type internal combustion engine comprising a cylinder located in the engine crankcase and an internal coolant circuit integrated in the crankcase. This internal circuit includes a portion surrounding the cylinder and thus forming a coolant chamber.

L'entrée de ce circuit est un trou traversant prévu au niveau de la paroi externe du moteur faisant face au circuit interne. Ce document ne traite pas de la problématique du débit de liquide de refroidissement dans le circuit interne de refroidissement du carter cylindre mais de l'absorption des vibrations. Il ne donne donc aucune solution quant à l'augmentation du débit de liquide de refroidissement par l'entrée du circuit interne de refroidissement.The input of this circuit is a through hole provided at the outer wall of the motor facing the internal circuit. This document does not deal with the problem of the flow of coolant in the internal cooling circuit of the cylinder block but the absorption of vibrations. It therefore gives no solution as to the increase of the flow of coolant through the inlet of the internal cooling circuit.

Par conséquent, l'objet de la présente invention est, d'une part, de concevoir un carter cylindre présentant une entrée pour son circuit de liquide de refroidissement de section suffisamment grande afin de permettre le passage de la totalité du fluide de refroidissement que lui envoie la pompe du circuit externe et, d'autre part, que cette adaptation soit compatible avec le procédé de fabrication du carter cylindre et les contraintes que la forme extérieure du carter cylindre doit respecter.Therefore, the object of the present invention is, on the one hand, to design a cylinder block having an inlet for its coolant circuit section sufficiently large to allow the passage of the entire fluid of cooling that sends the pump of the external circuit and, secondly, that this adaptation is compatible with the manufacturing process of the cylinder block and constraints that the outer shape of the cylinder block must comply.

Pour atteindre cet objectif, il est prévu selon l'invention un carter cylindre de moteur à combustion présentant au moins un cylindre et intégrant un circuit interne de liquide de refroidissement, ce circuit interne présentant une entrée, une sortie et au moins une chambre de liquide de refroidissement disposée à proximité dudit au moins un cylindre de façon à faire circuler le liquide de refroidissement à proximité dudit au moins un cylindre, l'entrée dudit circuit étant pratiquée à travers un logement intérieur défini par un élément de réception faisant partie du carter cylindre et destiné à recevoir une alimentation externe en liquide de refroidissement, caractérisé en ce que le logement intérieur est muni d'une protubérance ou modification locale permettant d'augmenter la surface de passage de l'entrée du circuit interne de refroidissement.To achieve this objective, it is provided according to the invention a combustion engine cylinder block having at least one cylinder and incorporating an internal circuit of coolant, the internal circuit having an inlet, an outlet and at least one chamber of liquid cooling device arranged near said at least one cylinder so as to circulate the cooling liquid in the vicinity of said at least one cylinder, the inlet of said circuit being formed through an inner housing defined by a receiving element forming part of the cylinder block and intended to receive an external supply of cooling liquid, characterized in that the inner housing is provided with a protuberance or local modification for increasing the passage area of the inlet of the internal cooling circuit.

Les termes protubérance et modification locale sont à comprendre au sens large comme toute modification dans la paroi du logement qui augmente la section de passage de l'entrée du circuit de refroidissement débouchant dans ledit logement.The terms protuberance and local modification are to be understood in the broad sense as any modification in the wall of the housing which increases the passage section of the inlet of the cooling circuit opening into said housing.

L'effet technique obtenu est l'accroissement de la section de passage de l'entrée du circuit interne de liquide de refroidissement, ceci d'une manière simple et sans nécessiter de changer complètement le procédé de fabrication du carter cylindre ni la configuration du carter cylindre, sa forme extérieure et le positionnement des diverses parties du carter cylindre restant inchangés.The technical effect obtained is the increase of the passage section of the inlet of the internal coolant circuit, this in a simple manner and without the need to change completely the manufacturing process of the crankcase or the configuration of the crankcase. cylinder, its outer shape and the positioning of the various parts of the cylinder block remaining unchanged.

Selon l'invention le logement intérieur de l'élément de réception est cylindrique et la protubérance ou modification locale est un méplat dans la paroi cylindrique dudit élément au niveau de l'entrée du circuit. Localement, la paroi du logement est donc modifiée pour, localement, ne plus être cylindrique mais présenter un pan droit qui va permettre d'élargir la section d'entrée du fluide de refroidissement.According to the invention the inner housing of the receiving element is cylindrical and the protuberance or local modification is a flat in the cylindrical wall of said element at the input of the circuit. Locally, the wall of the housing is modified to locally not be cylindrical but have a right side that will expand the inlet section of the cooling fluid.

Le logement est selon l'invention le logement d'une pompe pour la recirculation de liquide de refroidissement. Il peut être donc fermé à l'une de ses extrémités.The housing is according to the invention the housing of a pump for the recirculation of coolant. It can therefore be closed at one of its ends.

Avantageusement donc, le logement intérieur de l'élément de réception est cylindrique en étant fermé à une de ses extrémités, l'entrée du circuit interne présentant une portion de passage pratiquée sur la tranche du cylindre, la protubérance se trouvant au niveau de cette portion de passage et présentant une ouverture prolongeant ladite portion de passage.Advantageously therefore, the inner housing of the receiving element is cylindrical while being closed at one of its ends, the inlet of the internal circuit having a portion of passage made on the edge of the cylinder, the protuberance lying at this passage portion and having an opening extending said passage portion.

Avantageusement, la protubérance est sensiblement sous la forme d'un parallélépipède rectangle creux reposant sur l'extrémité fermée du logement intérieur par une de ses faces tandis que sa face opposée présente l'ouverture prolongeant ladite portion de passage.Advantageously, the protuberance is substantially in the form of a hollow rectangular parallelepiped resting on the closed end of the inner housing by one of its faces while its opposite face has the opening extending said passage portion.

Avantageusement, la protubérance et l'extrémité fermée sont d'un même tenant.Advantageously, the protuberance and the closed end are of the same holding.

La présente invention concerne aussi un ensemble d'un circuit externe de liquide de refroidissement et d'un carter cylindre, le circuit de refroidissement externe étant relié au circuit interne de liquide de refroidissement du carter cylindre et comprenant une pompe pour la circulation du liquide de refroidissement en son intérieur et dans le circuit interne du carter cylindre, caractérisé en ce que le carter cylindre est tel que précédemment mentionné.The present invention also relates to an assembly of an external coolant circuit and a cylinder block, the external cooling circuit being connected to the internal circuit of the coolant of the cylinder block and comprising a pump for the circulation of the coolant. cooling in its interior and in the internal circuit of the cylinder block, characterized in that the cylinder block is as previously mentioned.

La présente invention concerne un véhicule automobile, caractérisé en ce qu'il comprend un tel ensemble d'un circuit de liquide de refroidissement et d'un carter cylindre.The present invention relates to a motor vehicle, characterized in that it comprises such an assembly of a coolant circuit and a cylinder block.

Selon un autre aspect, la présente invention concerne un procédé de fabrication d'un tel carter cylindre s'effectuant par moulage dans un moule, caractérisé en ce que la partie du moule correspondant au logement intérieur de l'élément de réception du carter cylindre comprend une forme rentrante correspondant à la protubérance permettant d'augmenter la surface de l'entrée de passage du circuit interne de liquide de refroidissement.According to another aspect, the present invention relates to a method of manufacturing such a cylinder block being carried out by molding in a mold, characterized in that the part of the mold corresponding to the inner housing of the receiving element of the cylinder block comprises a re-entrant shape corresponding to the protuberance for increasing the surface of the inlet passage of the internal circuit of coolant.

Selon l'invention, la forme rentrante est un méplat.According to the invention, the re-entrant form is a flat part.

Avantageusement, le méplat est disposé sur deux parties complémentaires du moule.Advantageously, the flat is disposed on two complementary parts of the mold.

Avantageusement, le procédé est un procédé de moulage sous-pression ou par gravité.Advantageously, the method is a process for molding under pressure or by gravity.

D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre et au regard des dessins annexés donnés à titre d'exemples non limitatifs et sur lesquels :

  • la figure 1 est une représentation schématique en perspective d'un élément de réception de sortie de circuit externe de liquide refroidissement faisant partie d'un carter cylindre selon l'état de la technique, l'élément de réception portant en son intérieur l'entrée du circuit interne de liquide de refroidissement du carter cylindre,
  • la figure 2 est une représentation schématique en perspective d'un élément de réception de sortie de circuit externe de liquide refroidissement faisant partie d'un carter cylindre selon la présente invention, l'élément de réception portant en son intérieur une entrée agrandie pour le circuit interne de liquide de refroidissement du carter cylindre,
  • la figure 3 est une représentation schématique d'un carter cylindre selon la présente invention avec un élément de réception portant une entrée agrandie pour le circuit interne de liquide de refroidissement.
Other features, objects and advantages of the present invention will appear on reading the detailed description which follows and with reference to the appended drawings given by way of non-limiting examples and in which:
  • the figure 1 is a diagrammatic representation in perspective of an external cooling liquid circuit output receiving element forming part of a cylinder block according to the state of the art, the receiving element carrying inside the input of the internal circuit coolant of the cylinder block,
  • the figure 2 is a schematic perspective representation of an external coolant circuit output receiving member of a cylinder block according to the present invention, the receiving member having an enlarged inlet therein for the internal liquid circuit cooling the cylinder block,
  • the figure 3 is a schematic representation of a cylinder block according to the present invention with a receiving member having an enlarged inlet for the internal coolant circuit.

Aux figures 1 et 2, l'élément de réception 2 du carter cylindre 1 est montré séparément du reste du carter cylindre 1. Cet élément de réception fait cependant partie intégrante du carter cylindre 1 comme il peut être vu à la figure 3.To the figures 1 and 2 , the receiving element 2 of the cylinder block 1 is shown separately from the rest of the cylinder block 1. This receiving element however forms an integral part of the cylinder block 1 as can be seen in FIG. figure 3 .

En se référant à la figure 1, cette figure montre pour un carter cylindre 1 de moteur à combustion l'élément de réception 2 de la sortie d'un circuit externe de liquide de refroidissement à l'exclusion du reste du carter cylindre 1, cet élément de réception étant conforme à l'état de la technique. Le circuit externe de liquide de refroidissement fait office d'alimentation externe en liquide de refroidissement du carter cylindre 1, le liquide de refroidissement étant avantageusement à base d'eau avec ou sans additif.Referring to the figure 1 this figure shows, for a combustion engine cylinder casing 1, the receiving element 2 of the output of an external coolant circuit excluding the remainder of the cylinder block 1, this receiving element being in conformity with the state of the art. The external coolant circuit serves as external coolant supply of the cylinder block 1, the cooling liquid being advantageously water-based with or without additive.

Le carter cylindre 1 intègre un circuit interne de liquide de refroidissement, ce circuit interne présentant une entrée 3a et une sortie de passage de liquide ainsi qu'au moins une chambre de liquide de refroidissement disposée à proximité dudit au moins un cylindre. Ceci permet de faire circuler le liquide de refroidissement à proximité dudit au moins un cylindre pour son refroidissement.The cylinder block 1 integrates an internal coolant circuit, this internal circuit having an inlet 3a and a liquid passage outlet and at least one coolant chamber disposed near said at least one cylinder. This makes it possible to circulate the coolant in the vicinity of the at least one cylinder for cooling it.

L'élément de réception 2 présente un logement de réception 2a en son intérieur. Ce logement de réception 2a peut être avantageusement de forme sensiblement cylindrique en étant fermé à une de ses extrémités 5. Le logement 2a reçoit la sortie du circuit externe de liquide de refroidissement et la fait communiquer avec le circuit interne de liquide de refroidissement interne au carter cylindre par l'intermédiaire de son entrée 3a de passage.The receiving element 2 has a receiving housing 2a in its interior. This receiving housing 2a may advantageously be of substantially cylindrical shape being closed at one of its ends 5. The housing 2a receives the output of the external cooling liquid circuit and communicates it with the internal circuit of the internal cooling liquid to the housing cylinder via its entry 3a passage.

Ceci se fait en disposant l'entrée 3a de passage du circuit interne au carter cylindre 1 dans la tranche du cylindre formé par le logement 2a intérieur à l'élément de réception 2. L'entrée de passage 3a est donc en communication avec la sortie du circuit externe reçue dans le logement 2a de l'élément de réception 2 en étant alimentée en liquide de refroidissement par le circuit externe.This is done by arranging the inlet 3a of passage of the internal circuit to the cylinder block 1 in the edge of the cylinder formed by the housing 2a inside the element of 2. The passage entrance 3a is therefore in communication with the output of the external circuit received in the housing 2a of the receiving element 2 by being supplied with cooling liquid by the external circuit.

L'entrée 3a de passage traverse le logement 2a pour déboucher à l'intérieur du carter cylindre 1 et communiquer avec le reste du circuit interne de liquide de refroidissement au carter cylindre 1.The entry 3a passage through the housing 2a to open inside the cylinder block 1 and communicate with the rest of the internal circuit of coolant to the cylinder block 1.

La tranche du cylindre formant le logement de réception 2a et sa courbure limitent les dimensions de l'entrée 3a de passage, ce qui se révèle très désavantageux, le débit créé par une pompe disposée dans le circuit extérieur de fluide de refroidissement étant diminué lors du passage du fluide par cette entrée 3a.The slice of the cylinder forming the receiving housing 2a and its curvature limit the dimensions of the inlet 3a passage, which is very disadvantageous, the flow created by a pump disposed in the external cooling fluid circuit being reduced during the passage of the fluid through this inlet 3a.

A la figure 2, qui illustre un carter cylindre 1 selon la présente invention, les dimensions extérieures de l'élément de réception 2 et du carter cylindre 1 sont conservées. Il en va de même pour le logement de réception 2a intérieur qui conserve globalement sa forme, avantageusement cylindrique, à la différence près que le logement de réception 2a comporte une protubérance 4 permettant d'augmenter la surface de l'entrée 3 de passage du circuit interne de refroidissement dans le carter cylindre 1.To the figure 2 , which illustrates a cylinder block 1 according to the present invention, the outer dimensions of the receiving member 2 and the cylinder block 1 are retained. It is the same for the inner receiving housing 2a which generally retains its shape, advantageously cylindrical, with the difference that the receiving housing 2a has a protuberance 4 to increase the surface of the inlet 3 passage of the circuit internal cooling in the cylinder block 1.

En considérant la portion de passage de l'entrée 3 se trouvant sur la tranche du cylindre formé par le logement de réception 2a, la protubérance 4 se trouve avantageusement au niveau de cette portion de passage et présente une ouverture 6 de passage prolongeant ladite portion de passage.By considering the passage portion of the inlet 3 located on the edge of the cylinder formed by the receiving housing 2a, the protuberance 4 is advantageously at this passage portion and has a passage opening 6 extending said portion of passage.

Comme montré à la figure 2, la protubérance 4 est sensiblement sous la forme d'un parallélépipède rectangle creux reposant sur l'extrémité fermée 5 du logement de réception 2a intérieur par une de ses faces tandis que sa face opposée présente l'ouverture 6 prolongeant la portion de passage à travers la tranche du cylindre formé par le logement de réception 2a.As shown in figure 2 , the protuberance 4 is substantially in the form of a hollow rectangular parallelepiped resting on the closed end 5 of the receiving housing 2a inside by one of its faces while its opposite face has the opening 6 extending the passage portion through the edge of the cylinder formed by the receiving housing 2a.

Avantageusement, la protubérance 4 et l'extrémité fermée 5 du logement de réception 2a intérieur à l'élément de réception 2 sont d'un même tenant. Une telle protubérance 4 peut permettre d'augmenter la section de passage de l'entrée 3 de 10 à 50%, par exemple en la faisant, par exemple, passer d'une surface de 500 mm2 obtenue selon l'état de la technique à une surface de 687 mm2 selon la présente invention.Advantageously, the protuberance 4 and the closed end 5 of the receiving housing 2a inside the receiving element 2 are in the same holding. Such a protuberance 4 may make it possible to increase the passage section of the inlet 3 by 10 to 50%, for example by making it, for example, pass from a surface area of 500 mm 2 obtained according to the state of the art. at an area of 687 mm 2 according to the present invention.

La figure 3 permet de voir le positionnement de l'élément de réception 2 sur le carter cylindre 1, le logement de réception 2a à l'intérieur de cet élément de réception 2 étant muni d'une entrée élargie formée dans la protubérance 4 se trouvant au niveau de la portion de passage montrée à la figure 1 et présentant une ouverture 6 prolongeant ladite portion de passage.The figure 3 allows to see the positioning of the receiving element 2 on the cylinder block 1, the receiving housing 2a inside this receiving element 2 being provided with an enlarged inlet formed in the protuberance 4 at the passage portion shown in FIG. figure 1 and having an opening 6 extending said passage portion.

En se référant à la figure 2, l'invention concerne aussi un procédé de fabrication d'un carter cylindre 1 effectué par moulage dans un moule. La partie du moule correspondant au logement intérieur 2a de l'élément de réception 2 faisant partie du carter cylindre 1 comprend une forme rentrante correspondant à la protubérance 4 permettant d'augmenter la surface de l'entrée de passage du circuit interne de liquide de refroidissement. Cette forme rentrante permet d'obtenir la création de la protubérance 4 lors du moulage.Referring to the figure 2 the invention also relates to a method of manufacturing a cylinder block 1 made by molding in a mold. The part of the mold corresponding to the inner housing 2a of the receiving element 2 forming part of the cylinder block 1 comprises a re-entrant shape corresponding to the protuberance 4 making it possible to increase the surface area of the passage entrance of the internal coolant circuit. . This re-entrant shape makes it possible to obtain the creation of the protuberance 4 during molding.

Pour une protubérance sensiblement sous la forme d'un parallélépipède rectangle, la forme rentrante est sous la forme d'un méplat.For a protuberance substantially in the form of a rectangular parallelepiped, the reentrant form is in the form of a flat.

Avantageusement le moule est en plusieurs parties et le méplat est disposé sur deux parties complémentaires du moule.Advantageously, the mold is in several parts and the flat is disposed on two complementary parts of the mold.

Le procédé de moulage d'un carter cylindre est usuellement un procédé de moulage sous-pression. La présence d'une protubérance 4 dans le logement de réception 2a intérieur à la pièce de réception 2 du carter cylindre 1 permet de conserver ce type de procédé de fabrication. En alternative, le procédé de moulage peut aussi s'effectuer par gravité.The molding process of a cylinder block is usually an underpressure molding process. The presence of a protuberance 4 in the receiving housing 2a inside the receiving part 2 of the cylinder block 1 keeps this type of manufacturing process. Alternatively, the molding process can also be performed by gravity.

L'invention concerne aussi un ensemble d'un circuit externe de liquide de refroidissement et d'un carter cylindre 1, le circuit de refroidissement externe étant relié au circuit interne de liquide de refroidissement du carter cylindre 1 et comprenant une pompe pour la circulation du liquide de refroidissement en son intérieur et dans le circuit interne du carter cylindre 1, le carter cylindre étant tel que précédemment mentionné.The invention also relates to an assembly of an external coolant circuit and a cylinder block 1, the external cooling circuit being connected to the internal coolant circuit of the cylinder block 1 and comprising a pump for the circulation of the coolant in its interior and in the internal circuit of the cylinder block 1, the cylinder block being as previously mentioned.

L'invention concerne enfin un véhicule automobile comportant un tel ensemble d'un circuit de liquide de refroidissement et d'un carter cylindre 1.The invention finally relates to a motor vehicle comprising such a set of a coolant circuit and a cylinder block 1.

La présente invention permet une optimisation de la section de passage de l'entrée du circuit interne de liquide de refroidissement dans le carter cylindre, l'élément ajouté pour augmenter la section de passage, c'est-à-dire la protubérance, présentant une bonne tenue thermomécanique et donc une bonne durabilité en fonctionnement.The present invention allows an optimization of the passage section of the inlet of the internal coolant circuit in the cylinder block, the element added to increase the passage section, that is to say the protuberance, having a good thermomechanical behavior and therefore good durability in operation.

Tout en obtenant de manière simple un accroissement de la section de passage de l'entrée du circuit interne de liquide de refroidissement, selon l'invention il est ainsi possible de conserver le procédé usuel de fabrication du carter cylindre qui est le moulage sous pression en n'effectuant seulement que des modifications légères dans la conception du moule.While obtaining in a simple manner an increase in the passage section of the inlet of the internal circuit of coolant, according to the invention it is thus possible to maintain the usual manufacturing process of the cylinder block which is the pressure casting in making only minor changes in mold design.

L'invention n'est nullement limitée aux modes de réalisation décrits et illustrés qui n'ont été donnés qu'à titre d'exemples à condition que l'invention ne s'étende pas au delà de l'objet des revendications.The invention is in no way limited to the embodiments described and illustrated which have been given by way of examples only provided that the invention does not extend beyond the subject of the claims.

Claims (8)

  1. A cylinder block (1) for a combustion engine having at least one cylinder and comprising an inner coolant circuit, this inner circuit comprising an inlet (3), an outlet, and at least one coolant chamber arranged near said at least one cylinder in order to cause the coolant to circulate near said at least one cylinder, the inlet (3) of said circuit being provided through an inner housing (2a) defined by a reception element (2) forming part of the cylinder block (1) and intended to receive an external supply of coolant, characterized in that the inner housing (2a) is provided with a local modification (4) permitting the passage surface area of the inlet (3) of the inner cooling circuit to be increased, in that said housing (2a) houses a pump for the recirculation of coolant, and in that said inner housing (2a) of the reception element (2) is cylindrical, the local modification (4) being a flat area in the cylindrical wall of said element at the level of the inlet (3) of the circuit.
  2. The cylinder block (1) according to Claim 1, in which the inner housing (2a) of the reception element (2) is cylindrical, being closed at one (5) of its ends, the inlet (3) of the inner circuit having a passage portion (3a) formed on the section of the cylinder, the local modification (4) being situated at the level of this passage portion (3a) and having an opening (6) extending said passage portion (3a).
  3. The cylinder block (1) according to the preceding claim, for which the local modification (4) is substantially in the form of a hollow rectangular parallelepiped resting on the closed end of the inner housing (2a) by one of its faces, while its opposite face has the opening extending said passage portion (3a) .
  4. The cylinder block (1) according to any one of the preceding claims, for which the local modification (4) and the closed end (5) are in one piece.
  5. An assembly of an outer coolant circuit and of a cylinder block (1), the outer coolant circuit being connected to the inner coolant circuit of the cylinder block (1) and including a pump for the circulation of the coolant in its interior and in the inner circuit of the cylinder block (1), characterized in that the cylinder block (1) is according to any one of the preceding claims.
  6. A method for the manufacture of a cylinder block (1) according to any one of Claims 1 to 4, this method being carried out by casting in a mould, characterized in that the part of the mould corresponding to the inner housing (2a) of the reception element (2) of the cylinder block (1) includes a recessed shape corresponding to the local modification (4) permitting the surface of the passage inlet (3) of the inner coolant circuit to be increased, in which the recessed shape is a flattened area.
  7. The method according to the preceding claim, in which the flattened area is arranged on two complementary parts of the mould.
  8. The method according to any one of Claims 6 to 7, which is a method of pressure die casting or casting by gravity.
EP14731756.4A 2013-06-14 2014-05-28 Cylinder block having a widened coolant inlet Active EP3008306B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1355564A FR3007076B1 (en) 2013-06-14 2013-06-14 CYLINDER CASTER WITH ENLARGED INPUT FOR COOLANT
PCT/FR2014/051272 WO2014199043A1 (en) 2013-06-14 2014-05-28 Cylinder block having a widened coolant inlet

Publications (2)

Publication Number Publication Date
EP3008306A1 EP3008306A1 (en) 2016-04-20
EP3008306B1 true EP3008306B1 (en) 2018-12-19

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Application Number Title Priority Date Filing Date
EP14731756.4A Active EP3008306B1 (en) 2013-06-14 2014-05-28 Cylinder block having a widened coolant inlet

Country Status (3)

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EP (1) EP3008306B1 (en)
FR (1) FR3007076B1 (en)
WO (1) WO2014199043A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19642693B4 (en) * 1996-10-16 2005-05-25 Daimlerchrysler Ag Internal combustion engine with flange surfaces for connecting flanges of a feed and return line connected to a cooling water-flowed heat exchanger
JP2900248B2 (en) 1996-12-27 1999-06-02 本田技研工業株式会社 Water-cooled internal combustion engine
US6408803B1 (en) * 2000-10-19 2002-06-25 Robert M. Atkins Liquid cooling system and retrofit for horizontally opposed air cooled piston aircraft engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR3007076B1 (en) 2015-06-26
WO2014199043A1 (en) 2014-12-18
EP3008306A1 (en) 2016-04-20
FR3007076A1 (en) 2014-12-19

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