EP1859129B1 - Oil circulating device for internal combustion engine - Google Patents

Oil circulating device for internal combustion engine Download PDF

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Publication number
EP1859129B1
EP1859129B1 EP06709517A EP06709517A EP1859129B1 EP 1859129 B1 EP1859129 B1 EP 1859129B1 EP 06709517 A EP06709517 A EP 06709517A EP 06709517 A EP06709517 A EP 06709517A EP 1859129 B1 EP1859129 B1 EP 1859129B1
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EP
European Patent Office
Prior art keywords
oil
insert
canula
independent
separator
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EP06709517A
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German (de)
French (fr)
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EP1859129A1 (en
Inventor
Steeve Fontaine
Dominique Boulbin
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Renault SAS
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Renault SAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0488—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase

Definitions

  • the present invention relates, in general, to a device for preventing a rise of oil in an oil outlet formed in an oil separator / decanter of an internal combustion engine.
  • the invention relates to an oil circulation device for an internal combustion engine comprising a separator / decanter adapted to extract oil contained in an oil / gas mixture, a cylinder block in which at least one chamber is formed.
  • the apparatus further comprising a pressurized oil supply line adapted to convey oil under pressure to moving parts of said engine and a siphon oil return circuit, the oil return circuit; comprising at least one cannula whose upper end opens into an oil outlet of said separator / decanter to collect decanted oil and a lower end of which dips into an oil reservoir having an opening opening freely in a plane between said upper and lower ends of the cannula.
  • Ventilation gases consisting of an air-oil mixture usually pass through an oil separator / decanter to avoid a risk of rejection of air containing oil particles.
  • the oil settles on a settling surface formed in the separator / settler by a series of baffles allowing the mixture to gravity track a relatively large path along which air and oil separate.
  • the oil thus extracted and decanted leaves the decanter by an oil outlet.
  • siphons are used.
  • the purpose of the present invention is to optimize the manufacture of such an oil circulation device in the case of engines having a pipe for supplying oil under pressure.
  • the oil circulation device of the invention is essentially characterized in that said reservoir is made in an insert inserted in a sealed manner into a passageway formed through a wall of said pressurized oil supply line, the insert simultaneously constituting a closure plug of said oil supply line and an oil tank.
  • said pressurized oil supply line is used as a support for the oil reservoir which avoids having to position a support specifically dedicated to the maintenance of the reservoir and which also allows a saving of space in total height of the engine since the oil tank is partly positioned in the thickness of the wall of said oil supply line.
  • the existing difference between the threshold of the settling surface of the separator / decanter and the lower threshold of the siphon allows a pressure compensation in order to avoid the rise of a mixture of oil gas at the outlet of the decanter. Thanks to the invention, this height can be increased while reducing the height of the engine.
  • the length of the cannula which fixes the difference in level will be chosen according to the differential pressure existing between the outlet of the separator / decanter and the chamber into which the decanted oil is poured (generally inside the housing, and above the parts in motion to lubricate (for example in the crankcase).
  • the pressurized oil supply line is produced by molding, which is almost always the case, it is then necessary to have an opening in this supply line for allow the positioning and removal of a molding core (usually core defining the internal forms of the pipe). Usually, after removal of the molding core, this hole is plugged, using an insert / plug. Thanks to the invention the oil reservoir is formed in the cap of the high pressure pipe, thus saving a part and reduce the number of machining operations.
  • a portion of said pressurized oil supply line may form an integral part of said cylinder block and for the passage in which the insert is positioned to be formed in this portion and thus to be part of the cylinder block.
  • the invention is applied to a cylinder block comprising a pressurized oil supply line.
  • This embodiment can be applied to a large number of engines including Vee engines as in the example of Figures 1 to 3 described below.
  • said insert is crimped into the passage formed through the wall of said supply pipe.
  • the insert has the shape of a cylindrical bowl and that the lower end of the cannula is positioned in a lower zone of said bowl.
  • the cannula prefferably has a cylindrical tube shape and be coaxial with the cylindrical cup shaped insert.
  • a first height H1 defined by the minimum distance separating the lower end of the cannula from said opening of the oil reservoir, is less than half a second height H2 defined by the distance separating said lower and upper ends of the cannula.
  • This dimensional characteristic is advantageous for setting the pressure that can be compensated by the device of the invention.
  • the first height H1 is greater than a quarter of the second height H2.
  • the opening opening of said oil reservoir has a section greater than a cross section of oil passage in the cannula.
  • the device is adapted to be implanted in a multi-cylinder engine and that it comprises several independent cannulas and several independent oil reservoirs and in that the separator / decanter has several outlets. decanted oil, each independent cannula being connected to an independent oil outlet of said separator / settler and immersed in an independent oil reservoir, and in that each independent oil reservoir is an independent insert inserted into a corresponding passage formed through the wall said pressurized oil supply line, each independent insert thus simultaneously constituting a plug for closing said oil supply line and an oil tank.
  • the invention relates to an oil circulation device 1 integrated in an internal combustion engine which is here a Vee engine.
  • the Vee engine of the figure 1 has two rows of combustion chambers, distributed on either side of an axis AA. Each row of combustion chamber has 3 chambers positioned in the same plane.
  • a decanter 3 is positioned in the plane of symmetry of the engine and above an axis XX which is the axis of rotation of the crankshaft.
  • the location of the crankshaft 17 is arranged below the decanter / separator so that the oil is decanted and The split is flown over the crankshaft and back into the hull tray of the lower crankcase.
  • the figure 2 is a sectional view in a plane of the engine comprising the axis AA and the axis of rotation of the crankshaft XX.
  • Three cylinders 5 are partially visible and are the locations in which the pistons must be inserted. These cylinders are formed in the crankcase which is a self-contained molded part.
  • a pressurized oil supply line 6 is disposed in the cylinder block, between the separator / decanter 3 and the location 17 reserved for the crankshaft. This pipe 6 is adapted to be connected to an oil pump and has an oil outlet under pressure directed towards the location 17.
  • This pipe 6 is part of the cylinder block 4 which is a one-piece piece made by molding.
  • a deoiling zone 18 is formed in the crankcase above the pressurized oil supply line 6 and below the separator / settler.
  • the fact that the pressurized oil supply line is interposed between the separator / decanter and the location reserved for the crankshaft 17 makes it possible to protect the de-oiling zone from the direct oil projections coming from the crankshaft, which enables the oil transiting the de-oiling zone to flow on the pressurized oil supply line.
  • the pressurized oil supply pipe has an enlarged outer shape forming a deflector 19.
  • This deflector has oil flow zones adapted to drive, by gravity, the oil flowing from the deoiling zone 18. on the deflector 19 of the pipe 6, to local perforations 20 of the deflector 19.
  • the separator / decanter 3 is a chamber having an inlet opening into the de-oiling zone 18 to collect an oil / gas mixture to be separated.
  • the interior of the separator / settler 3 is formed of a multitude of baffles created so that the oil / gas mixture passes through a long path zigzagging from one baffle to the other. Thus the oil which comes into contact with a baffle falls by gravity to the separator / decanter and deoiled gases can be discharged to the outside of the engine.
  • the oil extracted from the oil / gas mixture is discharged from the separator / decanter 3 through an oil outlet 10 of the separator / decanter feeding an oil return circuit 7.
  • the oil return circuit forms a siphon to prevent the oil / gas mixture from entering the exchanger separator via its outlet 10.
  • This oil return circuit 7 comprises a cannula 8 whose upper end 9 is connected to the oil outlet of said separator / exchanger 3 and a lower end 11 of which is immersed in a reservoir 12.
  • This reservoir 12 is formed by an insert 14 in the form of bowl whose upper part of the bowl is open towards the inside of the cylinder block, in the de-oiling zone 18.
  • the opening of the bowl is in a plane P and in the form of a peripheral disk to the cannula, this disc being in the plane P and placed at a distance H1 from the lower end of the cannula.
  • the bottom of the cuvette is inserted into a passage formed through the wall 15 of the oil supply circuit and thus forms a plug of the pressurized oil supply line.
  • the second end of the cannula is located closer to the bottom of the cup-shaped insert than the upper edges of this bowl.
  • this bowl delimit said opening of the reservoir, the section of this opening being reduced by the section occupied by the assembly of the cannula.
  • the upper edges of the cup-shaped insert are in a horizontal plane allowing a flow of oil over the entire periphery of the bowl when the latter overflows.
  • a hole or passage formed through the wall 15 of the oil supply line to allow the machining of internal shapes to the pipe also allows to receive an insert once the inside of the pipe 6 machined.
  • the length of the cannula needed to prevent the rise of an oil / gas mixture is important without having to increase the height of the engine.
  • the back pressure inside the de-oiling zone can therefore be greater if necessary, without there being a need for an increase in engine height and without there being any risk of pollution of the engine. de-oiler by raising the oil / gas mixture.
  • the figure 3 represents a detailed view of a portion of the figure 2 .
  • a first height H1 determines the length of the canula portion 8 which is dipped in the oil reservoir 12 (distance between the lower end 11 of the cannula and the top of the tank).
  • a second height H2 determines the length of the cannula (distance between the ends of the cannula). The greater the difference in height between H1 and H2, the greater the back pressure in the de-oiling zone likely to produce a rise in the oil / gas mixture in the separator / settler.
  • the height H1 must be sufficient so that the volume of oil located above the lower end of the cannula and contained in the container can fill a determined cannula height as a function of the maximum permissible backpressure by the motor (the back pressure is the pressure difference between the pressure inside the decanter, at its outlet 10 and the pressure inside the deoiling zone 18).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Compressor (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Transformer Cooling (AREA)

Abstract

An oil circulating device for an internal combustion engine including a separating-decanting device, a cylinder housing, a pressurized oil feeding pipe circulating pressurized oil to mobile parts of the engine, and a siphon-forming oil return circuit. The oil return circuit includes a canula with an upper end that opens into the separating-decanting device to collect therein decanted oil and a lower end immersed in an oil tank opening freely into a plane located between the upper and lower ends of the canula. The tank includes an insert tightly inserted in a passageway formed through a wall of the pressurized oil feeding pipe, the insert forming simultaneously a closure plug for the oil feeding pipe and for an oil tank.

Description

La présente invention concerne, de façon générale, un dispositif permettant d'éviter une remontée d'huile dans une sortie d'huile formée dans un séparateur/décanteur d'huile d'un moteur à combustion interne.The present invention relates, in general, to a device for preventing a rise of oil in an oil outlet formed in an oil separator / decanter of an internal combustion engine.

Plus particulièrement, l'invention concerne un dispositif de circulation d'huile pour moteur à combustion interne comprenant un séparateur/décanteur adapté pour extraire de l'huile contenue dans un mélange huile/gaz, un carter cylindre dans lequel est formée au moins une chambre de combustion, le dispositif comportant en outre une conduite d'alimentation en huile sous pression adaptée pour acheminer de l'huile sous pression vers des parties mobiles dudit moteur et un circuit de retour d'huile formant siphon, le circuit de retour d'huile comportant au moins une canule dont une extrémité supérieure débouche dans une sortie d'huile dudit séparateur/décanteur pour y recueillir de l'huile décantée et dont une extrémité inférieure plonge dans un réservoir d'huile possédant une ouverture débouchant librement dans un plan situé entre lesdites extrémités supérieure et inférieure de la canule.More particularly, the invention relates to an oil circulation device for an internal combustion engine comprising a separator / decanter adapted to extract oil contained in an oil / gas mixture, a cylinder block in which at least one chamber is formed. the apparatus further comprising a pressurized oil supply line adapted to convey oil under pressure to moving parts of said engine and a siphon oil return circuit, the oil return circuit; comprising at least one cannula whose upper end opens into an oil outlet of said separator / decanter to collect decanted oil and a lower end of which dips into an oil reservoir having an opening opening freely in a plane between said upper and lower ends of the cannula.

Les moteurs à combustion interne sont lubrifiés par des systèmes de projection d'huile sur les pièces en mouvements tels que les pistons, les bielles, le vilebrequin ou les arbres à cames. Des gaz de ventilation constitués d'un mélange air-huile passent habituellement à travers un séparateur/décanteur d'huile pour éviter un risque de rejet d'air contenant des particules d'huile. L'huile se dépose sur une surface de décantation formée dans le séparateur/décanteur par une série de chicanes permettant au mélange de suivre par gravité un chemin relativement important le long duquel l'air et l'huile se séparent.Internal combustion engines are lubricated by oil spray systems on moving parts such as pistons, connecting rods, crankshaft or camshafts. Ventilation gases consisting of an air-oil mixture usually pass through an oil separator / decanter to avoid a risk of rejection of air containing oil particles. The oil settles on a settling surface formed in the separator / settler by a series of baffles allowing the mixture to gravity track a relatively large path along which air and oil separate.

L'huile ainsi extraite et décantée sort du décanteur par une sortie d'huile. Afin d'éviter que du mélange huile-air ne remonte dans le décanteur par sa sortie, des siphons sont utilisés.The oil thus extracted and decanted leaves the decanter by an oil outlet. In order to prevent the oil-air mixture from rising up into the settling chamber, siphons are used.

C'est la raison pour laquelle de nombreux fabricants de moteurs ont développé diverses solutions visant à éviter les remontées d'huile dans les séparateur/décanteur tout en cherchant à réduire à la fois la taille du moteur et le nombre de pièces nécessaires à la fabrication du dispositif de circulation d'huile pour moteur.This is the reason why many engine manufacturers have developed various solutions to avoid oil lifts in the separator / decanter while seeking to reduce both the size of the engine and the number of parts needed for manufacturing of the engine oil circulation device.

Un dispositif du type précédemment défini, permettant de tels avantages, est par exemple décrit dans le document brevet FR 2 819 291 , ainsi que dans le document brevet JP08260936 où le siphon est un réservoir inséré de façon étanche dans une paroi de la culasse.A device of the previously defined type, allowing such advantages, is for example described in the patent document. FR 2,819,291 , as well as in the patent document JP08260936 where the siphon is a tank inserted tightly into a wall of the cylinder head.

Dans ce contexte, la présente invention a pour but d'optimiser la fabrication d'un tel dispositif de circulation d'huile dans le cas de moteurs possédant une conduite d'alimentation en huile sous pression.In this context, the purpose of the present invention is to optimize the manufacture of such an oil circulation device in the case of engines having a pipe for supplying oil under pressure.

A cette fin, le dispositif de circulation d'huile de l'invention, par ailleurs conforme à la définition générique qu'en donne le préambule défini précédemment, est essentiellement caractérisé en ce que ledit réservoir est réalisé dans un insert inséré de façon étanche dans un passage formé au travers d'une paroi de ladite conduite d'alimentation en huile sous pression, l'insert constituant simultanément un bouchon d'obturation de ladite conduite d'alimentation en huile et un réservoir d'huile.To this end, the oil circulation device of the invention, moreover in conformity with the generic definition given in the preamble defined above, is essentially characterized in that said reservoir is made in an insert inserted in a sealed manner into a passageway formed through a wall of said pressurized oil supply line, the insert simultaneously constituting a closure plug of said oil supply line and an oil tank.

La présence de ce réservoir permet d'éviter la remontée d'huile par la sortie du séparateur-décanteur et permet ainsi de maximiser la fonction de séparation décantation d'huile. De plus, grâce à l'invention, la dite conduite d'alimentation en huile sous pression est utilisée comme support du réservoir d'huile ce qui évite d'avoir à positionner un support spécifiquement dédié au maintien du réservoir et ce qui permet également un gain de place en hauteur totale du moteur puisque le réservoir d'huile est en partie positionné dans l'épaisseur de la paroi de ladite conduite d'alimentation en huile.The presence of this tank makes it possible to avoid oil rising through the outlet of the separator-decanter and thus makes it possible to maximize the separation of oil settling function. In addition, thanks to the invention, said pressurized oil supply line is used as a support for the oil reservoir which avoids having to position a support specifically dedicated to the maintenance of the reservoir and which also allows a saving of space in total height of the engine since the oil tank is partly positioned in the thickness of the wall of said oil supply line.

La dénivellation existante entre le seuil de la surface de décantation du séparateur/décanteur et le seuil inférieur du siphon (ce seuil inférieur du siphon étant constitué par l'extrémité inférieure de la canule) permet une compensation de pression afin d'éviter la remonté d'un mélange d'huile gaz à l'endroit de la sortie du décanteur. Grâce à l'invention, cette dénivellation peut être accrue tout en réduisant la hauteur du moteur. La longueur de la canule qui fixe la dénivelation sera choisie en fonction du différentiel de pression existant entre la sortie du séparateur/décanteur et l'enceinte dans laquelle est déversée l'huile décantée (généralement l'intérieur du carter, et au dessus des pièces en mouvement à lubrifier (par exemple dans le carter vilebrequin).The existing difference between the threshold of the settling surface of the separator / decanter and the lower threshold of the siphon (this lower threshold of the siphon being constituted by the lower end of the cannula) allows a pressure compensation in order to avoid the rise of a mixture of oil gas at the outlet of the decanter. Thanks to the invention, this height can be increased while reducing the height of the engine. The length of the cannula which fixes the difference in level will be chosen according to the differential pressure existing between the outlet of the separator / decanter and the chamber into which the decanted oil is poured (generally inside the housing, and above the parts in motion to lubricate (for example in the crankcase).

Egalement, lorsque la conduite d'alimentation en huile sous pression est réalisée par moulage, ce qui est presque toujours le cas, il est alors nécessaire d'avoir une ouverture dans cette conduite d'alimentation pour permettre le positionnement puis le retrait d'un noyau de moulage (généralement noyau définissant les formes internes de la conduite). Habituellement, après retrait du noyau de moulage, ce trou est bouché, à l'aide d'un insert/bouchon. Grâce à l'invention le réservoir d'huile est réalisé dans le bouchon de la conduite haute pression, permettant ainsi d'économiser une pièce et réduire le nombre d'opération d'usinage.Also, when the pressurized oil supply line is produced by molding, which is almost always the case, it is then necessary to have an opening in this supply line for allow the positioning and removal of a molding core (usually core defining the internal forms of the pipe). Usually, after removal of the molding core, this hole is plugged, using an insert / plug. Thanks to the invention the oil reservoir is formed in the cap of the high pressure pipe, thus saving a part and reduce the number of machining operations.

On peut par exemple faire en sorte qu'une portion de ladite conduite d'alimentation en huile sous pression fasse partie intégrante dudit carter cylindre et que le passage dans lequel est positionné l'insert soit formé dans cette portion et fasse ainsi partie du carter cylindre.For example, it may be possible for a portion of said pressurized oil supply line to form an integral part of said cylinder block and for the passage in which the insert is positioned to be formed in this portion and thus to be part of the cylinder block. .

Dans ce mode de réalisation particulier, l'invention est appliquée à un carter cylindre comprenant une conduite d'alimentation en huile sous pression. Ce mode de réalisation peut être appliqué à un grand nombre de moteurs et notamment aux moteurs en Vé comme dans l'exemple des figures 1 à 3 décrites ci-après.In this particular embodiment, the invention is applied to a cylinder block comprising a pressurized oil supply line. This embodiment can be applied to a large number of engines including Vee engines as in the example of Figures 1 to 3 described below.

On peut également faire en sorte que l'ouverture du réservoir d'huile débouche librement dans une zone interne dudit carter cylindre, au-dessus d'un emplacement réservé à un vilebrequin.It is also possible to ensure that the opening of the oil reservoir opens freely into an internal zone of said cylinder block, above a location reserved for a crankshaft.

Selon un mode de réalisation particulier ledit insert est serti dans le passage formé au travers de la paroi de ladite conduite d'alimentation.According to a particular embodiment, said insert is crimped into the passage formed through the wall of said supply pipe.

On peut également faire en sorte que l'insert ait la forme d'une cuvette cylindrique et que l'extrémité inférieure de la canule soit positionnée dans une zone inférieure de ladite cuvette.It is also possible to ensure that the insert has the shape of a cylindrical bowl and that the lower end of the cannula is positioned in a lower zone of said bowl.

On peut également faire en sorte que la canule ait une forme de tube cylindrique et soit coaxiale par rapport à l'insert en forme de cuvette cylindrique.It is also possible for the cannula to have a cylindrical tube shape and be coaxial with the cylindrical cup shaped insert.

Dans ce mode de réalisation, il y a donc un jeu important entre la canule et l'insert en forme de cuvette, ce qui permet d'avoir une latitude importante de positionnement de la canule par rapport à l'insert réduisant ainsi les précisions d'usinage et d'assemblage nécessaires pour la réalisation du dispositif de l'invention.In this embodiment, there is therefore a large clearance between the cannula and the cup-shaped insert, which makes it possible to have considerable latitude in positioning the cannula relative to the insert, thus reducing the precision of the machining and assembly necessary for the realization of the device of the invention.

On peut également faire en sorte qu'une première hauteur H1, définie par la distance minimale séparant l'extrémité inférieure de la canule de ladite ouverture du réservoir d'huile, soit inférieure à la moitié d'une seconde hauteur H2 définie par la distance séparant les dites extrémités inférieure et supérieure de la canule.It can also be ensured that a first height H1, defined by the minimum distance separating the lower end of the cannula from said opening of the oil reservoir, is less than half a second height H2 defined by the distance separating said lower and upper ends of the cannula.

Cette caractéristique dimensionnelle est avantageuse pour fixer la pression pouvant être compensée par le dispositif de l'invention.This dimensional characteristic is advantageous for setting the pressure that can be compensated by the device of the invention.

Pour la même raison, on peut également faire en sorte que la première hauteur H1 soit supérieure à un quart de la seconde hauteur H2.For the same reason, it can also be done so that the first height H1 is greater than a quarter of the second height H2.

Egalement pour la même raison on peut également faire en sorte que l'ouverture débouchante dudit réservoir d'huile ait une section supérieure à une section transversale de passage d'huile dans la canule.Also for the same reason it is also possible to ensure that the opening opening of said oil reservoir has a section greater than a cross section of oil passage in the cannula.

Idéalement, on peut faire en sorte que le dispositif soit adapté pour être implanté dans un moteur à plusieurs cylindres et en ce qu'il comporte plusieurs canules indépendantes et plusieurs réservoirs d'huile indépendants et en ce que le séparateur/décanteur possède plusieurs sorties d'huile décantée indépendantes, chaque canule indépendante étant reliée à une sortie d'huile indépendante dudit séparateur/décanteur et plongeant dans un réservoir d'huile indépendant, et en ce que chaque réservoir d'huile indépendant est un insert indépendant inséré dans un passage correspondant formé au travers de la paroi de ladite conduite d'alimentation en huile sous pression, chaque insert indépendant constituant ainsi simultanément un bouchon d'obturation de ladite conduite d'alimentation en huile et un réservoir d'huile.Ideally, it can be arranged that the device is adapted to be implanted in a multi-cylinder engine and that it comprises several independent cannulas and several independent oil reservoirs and in that the separator / decanter has several outlets. decanted oil, each independent cannula being connected to an independent oil outlet of said separator / settler and immersed in an independent oil reservoir, and in that each independent oil reservoir is an independent insert inserted into a corresponding passage formed through the wall said pressurized oil supply line, each independent insert thus simultaneously constituting a plug for closing said oil supply line and an oil tank.

D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels :

  • la figure 1 représente une vue d'un moteur en Vé équipé du dispositif de l'invention ;
  • la figure 2 représente une vue en coupe du moteur en Vé selon un axe A-A ;
  • la figure 3 représente une vue agrandie d'une portion de la figure 2.
Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limitative, with reference to the appended drawings, in which:
  • the figure 1 represents a view of a Vee engine equipped with the device of the invention;
  • the figure 2 represents a sectional view of the Vee engine along an axis AA;
  • the figure 3 represents an enlarged view of a portion of the figure 2 .

Comme annoncé précédemment, l'invention concerne un dispositif de circulation d'huile 1 intégré dans un moteur à combustion interne qui est ici un moteur en Vé. Le moteur en Vé de la figure 1 comporte deux rangés de chambres de combustion, réparties de part et d'autre d'un axe A-A. Chaque rangé de chambre de combustion comporte 3 chambres positionnées dans un même plan.As previously announced, the invention relates to an oil circulation device 1 integrated in an internal combustion engine which is here a Vee engine. The Vee engine of the figure 1 has two rows of combustion chambers, distributed on either side of an axis AA. Each row of combustion chamber has 3 chambers positioned in the same plane.

Un décanteur 3 est positionné dans le plan de symétrie du moteur et au-dessus d'un axe X-X qui est l'axe de rotation du vilebrequin. L'emplacement réservé au vilebrequin 17 est disposé en dessous du décanteur/séparateur afin que de l'huile décantée et séparée s'écoule au-dessus du vilebrequin et retourne dans le bac à hile du carter inférieur.A decanter 3 is positioned in the plane of symmetry of the engine and above an axis XX which is the axis of rotation of the crankshaft. The location of the crankshaft 17 is arranged below the decanter / separator so that the oil is decanted and The split is flown over the crankshaft and back into the hull tray of the lower crankcase.

La figure 2 est une vue en coupe dans une plan du moteur comprenant l'axe A-A et l'axe de rotation du vilebrequin X-X. Trois cylindres 5 sont partiellement visibles et constituent les emplacement dans lesquels doivent être insérés les pistons. Ces cylindres sont formés dans le carter moteur qui est une pièce moulée d'un seul bloc. Une conduite d'alimentation 6 en huile sous pression est disposée dans le carter cylindre, entre le séparateur/décanteur 3 et l'emplacement 17 réservé au vilebrequin. Cette conduite 6 est adaptée pour être reliée à une pompe à huile et comporte une sortie d'huile sous pression dirigée en direction de l'emplacement 17.The figure 2 is a sectional view in a plane of the engine comprising the axis AA and the axis of rotation of the crankshaft XX. Three cylinders 5 are partially visible and are the locations in which the pistons must be inserted. These cylinders are formed in the crankcase which is a self-contained molded part. A pressurized oil supply line 6 is disposed in the cylinder block, between the separator / decanter 3 and the location 17 reserved for the crankshaft. This pipe 6 is adapted to be connected to an oil pump and has an oil outlet under pressure directed towards the location 17.

Cette conduite 6 fait partie du carter cylindre 4 qui est une pièce monobloc réalisée par moulage.This pipe 6 is part of the cylinder block 4 which is a one-piece piece made by molding.

Une zone de déshuilage 18 est formée dans le carter cylindre au-dessus de la conduite d'alimentation en huile sous pression 6 et en dessous du séparateur/décanteur. Le fait que la conduite d'alimentation en huile sous pression soit interposée entre de séparateur/décanteur et l'emplacement réservé au vilebrequin 17 permet de protéger la zone de déshuilage des projections d'huile directes provenant du vilebrequin ce qui permet à l'huile transitant dans la zone de déshuilage de s'écouler sur la conduite d'alimentation en huile sous pression.A deoiling zone 18 is formed in the crankcase above the pressurized oil supply line 6 and below the separator / settler. The fact that the pressurized oil supply line is interposed between the separator / decanter and the location reserved for the crankshaft 17 makes it possible to protect the de-oiling zone from the direct oil projections coming from the crankshaft, which enables the oil transiting the de-oiling zone to flow on the pressurized oil supply line.

La conduite d'alimentation en huile sous pression possède une forme extérieure élargie formant un déflecteur 19. Ce déflecteur possède des zones d'écoulement d'huile, adaptées pour conduire, par gravité, l'huile s'écoulant de la zone de déshuilage 18 sur le déflecteur 19 de la conduite 6, vers des perforations locales 20 du déflecteur 19.The pressurized oil supply pipe has an enlarged outer shape forming a deflector 19. This deflector has oil flow zones adapted to drive, by gravity, the oil flowing from the deoiling zone 18. on the deflector 19 of the pipe 6, to local perforations 20 of the deflector 19.

Le séparateur/décanteur 3 est une chambre possédant une entrée débouchant dans la zone de dé huilage 18 pour y collecter un mélange huile/gaz à séparer. L'intérieur du séparateur/décanteur 3 est formé d'une multitudes de chicanes créées pour que le mélange huile : gaz transite par un long chemin en zigzagant d'une chicane à l'autre. Ainsi l'huile qui entre au contact d'une chicane retombe par gravité au font du séparateur/décanteur et les gaz déshuilés peuvent être évacués vers l'extérieur du moteur. L'huile extraite du mélange huile/gaz s'évacue du séparateur/décanteur 3 par une sortie d'huile 10 du séparateur/décanteur alimentant un circuit de retour d'huile 7.The separator / decanter 3 is a chamber having an inlet opening into the de-oiling zone 18 to collect an oil / gas mixture to be separated. The interior of the separator / settler 3 is formed of a multitude of baffles created so that the oil / gas mixture passes through a long path zigzagging from one baffle to the other. Thus the oil which comes into contact with a baffle falls by gravity to the separator / decanter and deoiled gases can be discharged to the outside of the engine. The oil extracted from the oil / gas mixture is discharged from the separator / decanter 3 through an oil outlet 10 of the separator / decanter feeding an oil return circuit 7.

Le circuit de retour d'huile forme un siphon pour éviter que du mélange huile/gaz ne rentre dans le séparateur échangeur par sa sortie 10.The oil return circuit forms a siphon to prevent the oil / gas mixture from entering the exchanger separator via its outlet 10.

Ce circuit de retour d'huile 7 comporte une canule 8 dont une extrémité supérieure 9 est reliée à la sortie d'huile dudit séparateur/échangeur 3 et dont une extrémité inférieure 11 plonge dans un réservoir 12. Ce réservoir 12 est formé par un insert 14 en forme de cuvette dont la partie supérieure de la cuvette est ouverte vers l'intérieur du carter cylindre, dans la zone de déshuilage 18. L'ouverture de la cuvette est dans un plan P et à la forme d'un disque périphérique à la canule, ce disque étant dans le plan P et placé à une distance H1 de l'extrémité inférieure de la canule. Le fond de la cuvette est inséré dans un passage formé au travers de la paroi 15 du circuit d'alimentation en huile et forme ainsi un bouchon de la conduite d'alimentation en huile sous pression.This oil return circuit 7 comprises a cannula 8 whose upper end 9 is connected to the oil outlet of said separator / exchanger 3 and a lower end 11 of which is immersed in a reservoir 12. This reservoir 12 is formed by an insert 14 in the form of bowl whose upper part of the bowl is open towards the inside of the cylinder block, in the de-oiling zone 18. The opening of the bowl is in a plane P and in the form of a peripheral disk to the cannula, this disc being in the plane P and placed at a distance H1 from the lower end of the cannula. The bottom of the cuvette is inserted into a passage formed through the wall 15 of the oil supply circuit and thus forms a plug of the pressurized oil supply line.

La seconde extrémité de la canule est située à plus grande proximité du fond de l'insert en forme de cuvette que des bords supérieurs de cette cuvette.The second end of the cannula is located closer to the bottom of the cup-shaped insert than the upper edges of this bowl.

Les bords supérieurs de cette cuvette délimitent ladite ouverture du réservoir, la section de cette ouverture étant réduite de la section occupée par l'ensemble de la canule.The upper edges of this bowl delimit said opening of the reservoir, the section of this opening being reduced by the section occupied by the assembly of the cannula.

De fait, les bords supérieurs de l'insert en forme de cuvette sont dans un plan horizontal permettant un écoulement de l'huile sur toute la périphérie de la cuvette lorsque cette dernière déborde.In fact, the upper edges of the cup-shaped insert are in a horizontal plane allowing a flow of oil over the entire periphery of the bowl when the latter overflows.

De cette manière un trou ou passage formé au travers de la paroi 15 de la conduite d'alimentation en huile pour permettre l'usinage de formes internes à la conduite permet également de recevoir un insert une fois l'intérieur de la conduite 6 usiné. Plus la cuvette est profonde et plus la canule pourra être longue. La longueur de la canule nécessaire pour éviter la remonté d'un mélange huile/gaz est donc importante sans avoir à augmenter la hauteur du moteur. La contre-pression à l'intérieur de la zone de déshuilage peut donc être plus importante si nécessaire, sans qu'il y ait pour autant un besoin d'augmentation de hauteur du moteur et sans qu'il y ait de risque de pollution du déshuileur par remontée de mélange huile/gaz.In this way a hole or passage formed through the wall 15 of the oil supply line to allow the machining of internal shapes to the pipe also allows to receive an insert once the inside of the pipe 6 machined. The deeper the bowl, the longer the cannula. The length of the cannula needed to prevent the rise of an oil / gas mixture is important without having to increase the height of the engine. The back pressure inside the de-oiling zone can therefore be greater if necessary, without there being a need for an increase in engine height and without there being any risk of pollution of the engine. de-oiler by raising the oil / gas mixture.

Grâce à cet avantage le moteur peut donc avoir des performances accrues.Thanks to this advantage the engine can therefore have increased performance.

La figure 3 représente une vue détaillée d'une portion de la figure 2. Une première hauteur H1 détermine la longueur de la portion de canule 8 qui est plongée dans le réservoir d'huile 12 (distance entre l'extrémité inférieure 11 de la canule et le haut du réservoir). Une seconde hauteur H2 détermine la longueur de la canule (distance entre les extrémités de la canule). Plus la différence de hauteur entre H1 et H2 est importante et plus la contre-pression dans la zone de déshuilage susceptible de produire une remontée de mélange huile/gaz dans le séparateur/décanteur devra être importante. La hauteur H1 doit être suffisante pour que le volume d'huile situé au-dessus de l'extrémité inférieur de la canule et contenu dans le récipient puisse remplir une hauteur de canule déterminée en fonction de la contre-pression maximale admissible par le moteur (la contre-pression est la différence de pression entre la pression à l'intérieur du décanteur, au niveau de sa sortie 10 et la pression à l'intérieur de la zone de déshuilage 18).The figure 3 represents a detailed view of a portion of the figure 2 . A first height H1 determines the length of the canula portion 8 which is dipped in the oil reservoir 12 (distance between the lower end 11 of the cannula and the top of the tank). A second height H2 determines the length of the cannula (distance between the ends of the cannula). The greater the difference in height between H1 and H2, the greater the back pressure in the de-oiling zone likely to produce a rise in the oil / gas mixture in the separator / settler. The height H1 must be sufficient so that the volume of oil located above the lower end of the cannula and contained in the container can fill a determined cannula height as a function of the maximum permissible backpressure by the motor ( the back pressure is the pressure difference between the pressure inside the decanter, at its outlet 10 and the pressure inside the deoiling zone 18).

Claims (9)

  1. Oil circulation device (1) for an internal combustion engine (2) comprising a separator/decanter device (3) suitable for extracting oil contained in an oil/gas mixture, a cylinder housing (4) in which at least one combustion chamber (5) is formed, the device (1) also comprising a pressurized oil supply duct (6) suitable for carrying pressurized oil to the movable portions of said engine and an oil return circuit (7) forming a siphon, the oil return circuit (7) comprising at least one canula (8) of which a top end (9) opens into an oil outlet (10) of said separator/decanter device in order to collect decanted oil therein and of which a bottom end (11) is immersed in an oil reservoir (12) having an aperture (13) opening freely into a plane (P) situated between said top end (9) and said bottom end (11) of the canula (8), said reservoir (12) being made in an insert (14) inserted in a sealed manner into a passageway formed through a wall, characterized in that
    - said wall is a wall of said pressurized oil supply duct, the insert simultaneously forming a plug to close off said oil supply duct and an oil reservoir,
    - a portion of said pressurized oil supply duct forms an integral part of said cylinder housing, and
    - the passageway in which the insert is positioned is formed in this portion and thereby forms part of the cylinder housing.
  2. Device according to Claim 1, characterized in that the aperture of the oil reservoir opens freely into an internal zone of said cylinder housing, above a location reserved for a crankshaft.
  3. Device according to either of Claims 1 and 2, characterized in that said insert is swaged into the passageway formed through the wall of said supply duct.
  4. Device according to any one of Claims 1 to 3, characterized in that the insert has the shape of a cylindrical bowl and in that the bottom end of the canula is positioned in a bottom zone of said bowl.
  5. Device according to Claim 4, characterized in that the canula has a shape of a cylindrical tube and is coaxial relative to the cylindrical bowl-shaped insert.
  6. Device according to any one of Claims 1 to 5, characterized in that a first height H1, defined by the minimum distance separating the bottom end of the canula from said aperture of the oil reservoir, is less than half of a second height H2 defined by the distance separating said bottom and top ends of the canula.
  7. Device according to Claim 6, characterized in that the first height H1 is greater than a quarter of the second height H2.
  8. Device according to any one of claims 1 to 7, characterized in that the open-ended aperture of said oil reservoir has a section greater than an oil passageway cross section in the canula.
  9. Device according to any one of Claims 1 to 8, characterized in that it is suitable for being installed in an engine with several cylinders and in that it comprises several independent canulas and several independent oil reservoirs and in that the separator/decanter device has several independent outlets of decanted oil, each independent canula being connected to an independent oil outlet of said separator/decanter device and immersed in an independent oil reservoir, and in that each independent oil reservoir is an independent insert inserted into a corresponding passageway formed through the wall of said pressurized oil supply duct, each independent insert therefore simultaneously forming a plug for closing off said oil supply duct and an oil reservoir.
EP06709517A 2005-03-07 2006-02-15 Oil circulating device for internal combustion engine Active EP1859129B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0502267A FR2882783B1 (en) 2005-03-07 2005-03-07 OIL CIRCULATION DEVICE FOR INTERNAL COMBUSTION ENGINE
PCT/FR2006/050138 WO2006095104A1 (en) 2005-03-07 2006-02-15 Oil circulating device for internal combustion engine

Publications (2)

Publication Number Publication Date
EP1859129A1 EP1859129A1 (en) 2007-11-28
EP1859129B1 true EP1859129B1 (en) 2012-05-02

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US (1) US8015966B2 (en)
EP (1) EP1859129B1 (en)
JP (1) JP4881942B2 (en)
KR (1) KR20070116073A (en)
CN (1) CN100529338C (en)
AT (1) ATE556201T1 (en)
FR (1) FR2882783B1 (en)
WO (1) WO2006095104A1 (en)

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DE102016201414B4 (en) * 2016-01-29 2017-10-05 Ford Global Technologies, Llc Internal combustion engine with oil circuit
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JP2008531925A (en) 2008-08-14
CN100529338C (en) 2009-08-19
US20090211851A1 (en) 2009-08-27
KR20070116073A (en) 2007-12-06
FR2882783A1 (en) 2006-09-08
WO2006095104A1 (en) 2006-09-14
FR2882783B1 (en) 2007-05-11
JP4881942B2 (en) 2012-02-22
CN101137823A (en) 2008-03-05
EP1859129A1 (en) 2007-11-28
ATE556201T1 (en) 2012-05-15
US8015966B2 (en) 2011-09-13

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