EP2956637B1 - Oil circuit for an internal combustion engine with optimised actuating means - Google Patents

Oil circuit for an internal combustion engine with optimised actuating means Download PDF

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Publication number
EP2956637B1
EP2956637B1 EP14710014.3A EP14710014A EP2956637B1 EP 2956637 B1 EP2956637 B1 EP 2956637B1 EP 14710014 A EP14710014 A EP 14710014A EP 2956637 B1 EP2956637 B1 EP 2956637B1
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EP
European Patent Office
Prior art keywords
oil
actuating
tube
ramp
circuit according
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EP14710014.3A
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German (de)
French (fr)
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EP2956637A1 (en
Inventor
Stéphane Ruby
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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
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • 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
    • F01M1/16—Controlling lubricant pressure or quantity

Definitions

  • the invention relates to an oil circuit for an internal combustion engine and to a crankcase provided with it.
  • the present invention relates to the field of oil supply of internal combustion engines. It aims in particular an oil circuit for lubricating and cooling various components of an internal combustion engine fitted to a motor vehicle.
  • the internal combustion engines comprise an oil circuit intended to lubricate the various components of the engine, in particular the crankshaft bearings, the conrod heads, etc.
  • these bodies need to be lubricated continuously to ensure proper operation of the engine.
  • the oil circuit allows also cool the oil and engine components such as pistons, which are thermally and mechanically stressed.
  • the oil circuit is supplied via a filter by an oil pump and generally comprises a single oil supply ramp conveying this oil to the various points of the engine.
  • the lubricating fluid also serves as a coolant, the need for cooling increases dramatically with the specific power of the motors. Therefore, this ramp can be equipped with several nozzles dosing and spraying a jet of oil oriented towards the bottom of pistons, for example, to operate their cooling, the nozzles being oriented towards the vault of the pistons. In this case, it is not possible to cut this ramp for problems of pincushion jam.
  • the cooling of the pistons can increase the blow-by gas flow (in French: crankcase gas mainly from leaks at the level of the segmentation), the oil consumption and can especially to reduce the temperature of the exhaust gases. This reduction slows down the activation of the post-treatment elements of these gases.
  • the nozzles are provided in connection with the main ramp of the lubrication circuit which feeds the crankshaft bearings, the big-end bearings and the rise to the cylinder head.
  • This ramp may provide a passive valve for each nozzle or a flow control solenoid valve located upstream of the nozzles.
  • FR2 973 070 discloses an oil supply system for lubricating an internal combustion engine and for cooling the pistons including a first oil ramp for lubricating the engine, a second oil supply ramp for cooling the pistons, a pump oil intended for the circulation of oil in the two circuits and a pilot valve arranged upstream of the second ramp to supply the cooling circuit according to the operation of the engine.
  • the valve is thus in the closed position to facilitate the temperature rise of the engine and then in the open position to cool the engine elements among which the pistons.
  • the system requires two separate feed ramps and a pilot valve and valve control means which makes the system expensive.
  • the oil supply is controlled according to the pressure (which controls the opening of the valves) with the use of measuring means and actuating motors or the motor control (in the case a solenoid valve).
  • the disadvantage is that for powers (or loads) below the maximum power, the nozzle flow is higher than the needs, which generates a fuel consumption higher than the needs to drive the oil pump.
  • crankcase which is complex and expensive, and specific jets require extensive wiring in a hostile environment (oil, moving parts, etc.).
  • the object of the invention is in particular to remedy these disadvantages of the prior art.
  • an object of the invention is to provide an oil circuit for limiting the oil flow just needed to ensure on the one hand, the cooling of the various bodies at different engine speeds and a reduction of fuel consumption, and secondly, to limit and promote a rise in temperature of these organs.
  • Another objective of the invention is to propose a simple, universal and inexpensive thermal management solution.
  • the flow control means or inlet adapted to receive oil, an outlet passing through at least a portion of this oil and a longitudinal wall traversed by passages for the circulation of the oil.
  • the pivoting movement of the actuating tube can be converted into a translation movement of the cylindrical tube and therefore of the vanes sliding against the wall in the longitudinal direction of the ramp.
  • the invention also relates to an internal combustion engine casing comprising at least one oil circuit as described above.
  • an oil circuit is intended to supply oil to various components of an internal combustion engine (not shown) of a motor vehicle. More specifically, it allows to lubricate and cool some organs of said engine.
  • a pump therefore sucks oil, via a strainer and a filtration module, contained in an oil sump, to supply the engine oil circuit (all these elements are not shown).
  • the oil exiting the pump is then injected under pressure into a ramp 10 formed and formed in the crankcase of the engine (not shown). This ramp 10 is called the main ramp with reference to its function of routing the oil to the various organs and conduits of the engine.
  • the ramp 10, shown in negative on the figure 1 is of cylindrical shape and has an oil inlet 11 and first oil outlets 12 connected to cooling ducts to different engine components such as nozzles for example and second oil outlets 13 connected to air ducts. circulation of oil for lubricating and / or supplying oil to various members of said engine such as crankshaft bearings and crank bearings as well as the ducts of the rise to the cylinder head (not shown).
  • the oil ramp 10 is continuously supplied by the oil pump.
  • At least one outlet 12 of the ramp 10 is connected by a cooling duct 18 to a nozzle (not shown) installed in the wall of a cylinder in which the piston slides (not shown) and at least one output 13 of the ramp 10 opens on an oil supply conduit of the crankshaft bearings (not shown).
  • the nozzles are generally intended to inject a jet of oil towards the bottom of the pistons for their cooling.
  • the cooling of the various members is however not necessary at all times of operation of the engine while the lubrication must in no case stop when said engine is in operation. Note that the invention applies to single-cylinder or multicylinder engines.
  • the ramp 10 comprises a flow control device 14 comprising means 15 for regulating the flow of oil to the engine components. These flow control means 15 are movably arranged in the ramp 10 to close and open at least partially at least one of the outputs 12, 13 of the ramp 10.
  • the regulating device also comprises means 16 for implementing movement for setting in motion these flow control means 15 or closure of the outputs 12, 13 of the main ramp.
  • the flow control means 15 comprise at least one tube 20 movable in the ramp 10 and pallets 21 carried radially by arms 22 from the tube 20.
  • Said tube 20 is mounted coaxially in the main ramp 10 and has a smaller diameter to that of the main ramp.
  • Said pallets 21 are preferably substantially rectangular plates arranged to seal the first outlets 12 connected to the oil circulation ducts 18 for cooling in the ramp 10 when they are positioned vis-à-vis said outputs 12.
  • the second outputs 13 connected to the lubrication and / or oil supply ducts 19 are not intended to be closed by said pallets, the oil can therefore to circulate continuously in said ducts.
  • the tube 20 is mounted to pivot about its axis of revolution in the ramp 10 substantially by a quarter of a turn to cause the vanes 21 to pivot in sliding on the wall of the ramp 10, to close off or clear at least one orifice 12 of the ramp 10 connected to the cooling duct 18.
  • Said tube 20 is connected at one end to displacement means 16 which according to the proposed example consists of a rotation or a pivoting.
  • the tube 20 is preferably steel obtained by molding with a diameter of the order of 5 mm but which may vary depending on the engine. Other materials can of course be considered, such as a plastic that can withstand the pressure and temperatures in the engine.
  • the flow control is obtained by moving the tube 20 inside the ramp 10 so that the outputs 12 of the ramp 10 are closed by said vanes 21 when for example the engine is still cold and does not require cooling of the However, when the engine is hot, the temperatures of said bodies reaching thresholds too high, oil must be injected to said bodies for cooling.
  • the oil pump sends oil at higher pressure to the main boom 10 and the outlets 12 connected to the cooling ducts 18 must be released for the flow of oil to these bodies.
  • this solution makes it possible to manage the flow rate of the nozzles as a function of the pressure drop at the passages opposite the outlets 12 of the main ramp 10.
  • Said displacement means 16 for rotating or pivoting the regulating means 15 comprise an actuating member 30 calibrated with the oil pressure flowing in the circuit.
  • Said displacement means 16 represented in figures 1 and 3 may comprise an actuating tube 31 whose diameter is substantially smaller than the inside diameter of the ramp 10 and rotatably mounted in a substantially cylindrical reservoir element 32, the actuating tube 31 is preferably mounted coaxially with the ramp main and movable pivotally in said ramp and intended to cooperate with the tube 20 of the regulating means 15.
  • the reservoir element 32 comprises a casing 33 substantially in the form of a solid cylinder comprising an actuating chamber 34 and an axial circular opening 35, the diameter of said axial opening 35 being substantially equal to the diameter of the actuating tube 31 to surround said actuating tube with a very small clearance.
  • the actuating chamber 34 is formed substantially by a cylinder quarter extending from the circular opening, said cylinder quarter is closed by two walls at the axial ends. Said actuating chamber 34 thus extends longitudinally over a length substantially shorter than the length of the reservoir element 32 and angularly over an arc of greater than 45 ° and less than 180 °.
  • the actuating tube 31 comprises an outer circular wall 36 and at least one substantially radial separation wall 37 extending longitudinally on said outer circular wall 36 of the actuating tube and adapted to share the actuating chamber 34 in two parts.
  • actuator 38, 39 sealed from one another.
  • the actuating tube 31 has a radial opening 40 opening on one side and near the partition wall 37 in a first actuating portion 38.
  • the tube 20 of the control means is preferably pressed into the actuating tube 31 and welded in said tube 31 so that the rotation of the actuating tube causes the rotation of the tube 20 of the control means.
  • an elastic means 41 adapted to push the partition wall 36 so as to increase the volume of the second actuating portion 39 where said elastic means is positioned.
  • the stiffness of the elastic means 41 is chosen as a function of the levels of the pressure of the oil.
  • the actuating means 16 is placed at one end of the main ramp 10 so that the actuating tube 31 is coupled to the tube 20 of the regulation means inserted in the main ramp 10 and that the inside of the tube actuation 31 is in the extension of the oil circuit.
  • the casing 33, the actuating tube 31 with the separating sheet 32 may be made of steel or plastic obtained by molding for example.
  • Oil is injected into the main ramp, then arrives in the actuating tube 31 and passes through the radial opening 40 in the actuating tube 31 for filling the first portion 38 of the actuating chamber 34.
  • the stiffness of the elastic means 41 of the actuating means is such that from a certain oil pressure level, the elastic means retracts and the partition wall 37 is moved in the direction of the reduction of the second portion 39 of the actuating chamber. This movement is reflected by a rotation of the actuating tube 31 rotatable in the ramp 10 and thus by a rotation of the tube 20 causing an opening or closing of the outlets 12 connected to the cooling ducts 18.
  • the operation of the actuating means is simple and does not require an additional source of energy.
  • the pivoting can be converted into a longitudinal translation movement along the axis of the main ramp of the cylindrical tube 20 of the regulating means.

Description

L'invention concerne un circuit d'huile pour moteur à combustion interne, ainsi qu'un carter moteur qui en est pourvu.The invention relates to an oil circuit for an internal combustion engine and to a crankcase provided with it.

1. Domaine de l'invention1. Field of the invention

La présente invention concerne le domaine de l'alimentation en huile des moteurs à combustion interne. Elle vise en particulier un circuit d'huile destiné à lubrifier et à refroidir divers organes d'un moteur à combustion interne équipant un véhicule automobile.The present invention relates to the field of oil supply of internal combustion engines. It aims in particular an oil circuit for lubricating and cooling various components of an internal combustion engine fitted to a motor vehicle.

2. Art antérieur2. Prior Art

De manière connue, les moteurs à combustion interne comprennent un circuit d'huile destiné à lubrifier les différents organes du moteur, en particulier les paliers de vilebrequin, les têtes de bielle, etc. Afin de diminuer les frottements entre les divers organes entrainant des surchauffes et éventuellement des ruptures, ces organes ont besoin d'être lubrifiés continuellement pour assurer un bon fonctionnement du moteur. (voir par exemple le système présenté dans le document GB 286 088 )In known manner, the internal combustion engines comprise an oil circuit intended to lubricate the various components of the engine, in particular the crankshaft bearings, the conrod heads, etc. In order to reduce the friction between the various members causing overheating and possibly rupture, these bodies need to be lubricated continuously to ensure proper operation of the engine. (see for example the system presented in the document GB 286 088 )

Le circuit d'huile permet
également de refroidir l'huile et les organes du moteur tels les pistons, qui sont sollicités thermiquement et mécaniquement.The oil circuit allows
also cool the oil and engine components such as pistons, which are thermally and mechanically stressed.

Pour cela, le circuit d'huile est alimenté via un filtre par une pompe à huile et comprend généralement une rampe unique d'alimentation d'huile acheminant cette huile vers les différents points du moteur. Etant donné que le fluide de lubrification sert aussi de fluide caloporteur, le besoin de refroidissement augmente énormément avec la puissance spécifique des moteurs. De ce fait, cette rampe peut être équipée de plusieurs gicleurs dosant et pulvérisant un jet d'huile orienté vers le fond des pistons, par exemple, pour opérer leur refroidissement, les gicleurs étant orientés en direction de la voute des pistons. Dans ce cas, il n'est pas envisageable de couper cette rampe pour des problèmes de grippage coussinet.For this, the oil circuit is supplied via a filter by an oil pump and generally comprises a single oil supply ramp conveying this oil to the various points of the engine. Since the lubricating fluid also serves as a coolant, the need for cooling increases dramatically with the specific power of the motors. Therefore, this ramp can be equipped with several nozzles dosing and spraying a jet of oil oriented towards the bottom of pistons, for example, to operate their cooling, the nozzles being oriented towards the vault of the pistons. In this case, it is not possible to cut this ramp for problems of pincushion jam.

Il est aussi intéressant de pouvoir couper le débit des gicleurs dans les phases de démarrage et de faible charge, afin de bénéficier d'une réduction de débit de pompe à huile pour diminuer les consommations de carburant et donc les émissions de gaz nocifs (CO2).It is also interesting to be able to cut the flow of the sprinklers in the starting and low load phases, in order to benefit from a reduction of oil pump flow to reduce the fuel consumption and thus the emissions of harmful gases (CO 2 ).

En parallèle, lors des phases de mise en action, le refroidissement des pistons peut augmenter le débit de gaz de blow-by (en français : gaz de carter provenant principalement des fuites au niveau de la segmentation), la consommation d'huile et peut surtout entrainer la réduction de la température des gaz d'échappement. Cette réduction ralentit la mise en action des éléments de post-traitement de ces gaz.In parallel, during the activation phases, the cooling of the pistons can increase the blow-by gas flow (in French: crankcase gas mainly from leaks at the level of the segmentation), the oil consumption and can especially to reduce the temperature of the exhaust gases. This reduction slows down the activation of the post-treatment elements of these gases.

Pour palier ces inconvénients, d'autres solutions ont été développées pour lubrifier et refroidir les organes du moteur. Par exemple, les gicleurs sont prévus en relation avec la rampe principale du circuit de lubrification qui alimente les paliers de vilebrequin, les paliers de tête de bielle et la montée vers la culasse. On peut également utiliser une rampe secondaire spécifique dédiée aux gicleurs. Cette rampe peut prévoir un clapet passif pour chaque gicleur ou bien une électrovanne de régulation de débit placée en amont des gicleurs.To overcome these drawbacks, other solutions have been developed for lubricating and cooling the motor members. For example, the nozzles are provided in connection with the main ramp of the lubrication circuit which feeds the crankshaft bearings, the big-end bearings and the rise to the cylinder head. One can also use a specific secondary boom dedicated to sprinklers. This ramp may provide a passive valve for each nozzle or a flow control solenoid valve located upstream of the nozzles.

Ainsi la publication FR2 973 070 divulgue un système d'alimentation en huile pour lubrifier un moteur à combustion interne et à refroidir les pistons comprenant une première rampe d'huile destinée à la lubrification du moteur, une deuxième rampe d'alimentation en huile pour le refroidissement des pistons , une pompe à huile destinée à la circulation d'huile dans les deux circuits et une vanne pilotée disposée en amont de la deuxième rampe pour alimenter le circuit de refroidissement selon le fonctionnement du moteur. La vanne est ainsi en position fermée pour faciliter la montée en température du moteur puis en position ouverte pour refroidir les éléments du moteur parmi lesquels les pistons. Le système nécessite deux rampes d'alimentation distinctes ainsi qu'une vanne pilotée et des moyens de pilotage de la vanne ce qui rend le système couteux.So the publication FR2 973 070 discloses an oil supply system for lubricating an internal combustion engine and for cooling the pistons including a first oil ramp for lubricating the engine, a second oil supply ramp for cooling the pistons, a pump oil intended for the circulation of oil in the two circuits and a pilot valve arranged upstream of the second ramp to supply the cooling circuit according to the operation of the engine. The valve is thus in the closed position to facilitate the temperature rise of the engine and then in the open position to cool the engine elements among which the pistons. The system requires two separate feed ramps and a pilot valve and valve control means which makes the system expensive.

Par ailleurs, dans toutes les solutions connues, l'alimentation en huile est commandée en fonction de la pression (qui commande l'ouverture des clapets) avec utilisation de moyens de mesures et de moteurs d'actionnement ou le contrôle moteur (dans le cas d'une électrovanne). L'inconvénient est que pour des puissances (ou charges) inférieures à la puissance maximale, le débit des gicleurs est supérieur aux besoins, ce qui engendre une consommation de carburant supérieure aux besoins pour entraîner la pompe à huile.Moreover, in all known solutions, the oil supply is controlled according to the pressure (which controls the opening of the valves) with the use of measuring means and actuating motors or the motor control (in the case a solenoid valve). The disadvantage is that for powers (or loads) below the maximum power, the nozzle flow is higher than the needs, which generates a fuel consumption higher than the needs to drive the oil pump.

Un autre inconvénient est la mise en place desdits moyens de mesure de la pression d'huile associés à des moteurs d'actionnement, qui sont coûteux et nécessitent une mise en place spécifique.Another disadvantage is the introduction of said means for measuring the oil pressure associated with actuating motors, which are expensive and require specific placement.

Enfin, ces solutions nécessitent également une reconception complète du carter-cylindres, ce qui est complexe et coûteux, et les gicleurs spécifiques nécessitent un câblage important dans un milieu hostile (huile, pièces en mouvement, etc.).Finally, these solutions also require a complete redesign of the crankcase, which is complex and expensive, and specific jets require extensive wiring in a hostile environment (oil, moving parts, etc.).

3. Objectif de l'invention3. Objective of the invention

L'invention a notamment pour objectif de remédier à ces inconvénients de l'art antérieur.The object of the invention is in particular to remedy these disadvantages of the prior art.

Plus précisément, un objectif de l'invention est de fournir un circuit d'huile permettant de limiter le débit d'huile au juste nécessaire pour assurer d'une part, le refroidissement des différents organes selon les différents régimes du moteur et une réduction de la consommation de carburant, et d'autre part, de limiter et favoriser une montée en température de ces organes. Un autre objectif de l'invention est de proposer une solution de gestion thermique simple, universelle et peu coûteuse.More specifically, an object of the invention is to provide an oil circuit for limiting the oil flow just needed to ensure on the one hand, the cooling of the various bodies at different engine speeds and a reduction of fuel consumption, and secondly, to limit and promote a rise in temperature of these organs. Another objective of the invention is to propose a simple, universal and inexpensive thermal management solution.

4. Résumé de l'invention4. Summary of the invention

Ces objectifs sont atteints grâce à un circuit d'huile pour moteur à combustion interne comportant une rampe sensiblement cylindrique et présentant une entrée d'huile et des sorties d'huile pour alimenter en huile différents organes dudit moteur et comportant un système de régulation de débit d'huile comprenant des moyens de fermeture des sorties d'alimentation, mobiles dans la rampe et mis en mouvement par un moyen d'actionnement, caractérisé en ce que ledit moyen d'actionnement est taré à une pression nominale d'huile traversant le circuit et apte à mettre en mouvement le moyen de fermeture des sorties d'alimentation d'huile en cas de dépassement de la pression nominale d'huile.

  • Ainsi, ces moyens de régulation de débit sont une solution simple et universelle de gestion des moyens d'alimentation en huile des organes du moteur. On obtient la même fonctionnalité qu'un système complet et complexe comprenant une deuxième rampe dédiée à la lubrification et au refroidissement de certains organes du moteur. Le moyen d'actionnement mécanique apporte une régulation du débit d'huile selon des niveaux de pression de l'huile circulant.
These objectives are achieved by means of an oil circuit for an internal combustion engine comprising a substantially cylindrical ramp and having an oil inlet and oil outlets for supplying oil to various members of said engine and comprising a flow control system. of oil comprising means for closing the supply outlets, movable in the ramp and set in motion by an actuating means, characterized in that said actuating means is calibrated at a nominal pressure of oil passing through the circuit and able to set in motion the closing means of the oil supply outlets in case of exceeding the nominal pressure of oil.
  • Thus, these flow control means are a simple and universal solution for managing the oil supply means of the engine components. The same functionality is obtained as a complete and complex system comprising a second ramp dedicated to the lubrication and cooling of certain engine components. The mechanical actuation means provides a regulation of the oil flow according to pressure levels of the circulating oil.

Selon un mode de réalisation préféré de l'invention, le ou les moyens de régulation de débit présentent une entrée adaptée à recevoir de l'huile, une sortie laissant passer au moins une partie de cette huile et une paroi longitudinale traversée par des passages permettant la circulation de l'huile.According to a preferred embodiment of the invention, the flow control means or inlet adapted to receive oil, an outlet passing through at least a portion of this oil and a longitudinal wall traversed by passages for the circulation of the oil.

Avec cette configuration, il y a toujours une circulation de l'huile dans la rampe et dans le moyen de régulation de débit. Celui-ci peut, grâce à sa mobilité coopérer avec les sorties de la rampe pour réguler le débit d'huile vers chaque organe selon le niveau de pression de l'huile circulant sans nécessité de moyens de mesures.With this configuration, there is always a circulation of the oil in the ramp and in the flow control means. It can, thanks to its mobility cooperate with the outputs of the ramp to regulate the flow of oil to each member according to the pressure level of the circulating oil without the need for measuring means.

Selon d'autres caractéristiques de l'invention:

  • le moyen d'actionnement est apte à faire pivoter un tube cylindrique d'actionnement autour de son axe de révolution relié aux moyens de fermeture.
According to other features of the invention:
  • the actuating means is adapted to rotate a cylindrical actuating tube about its axis of revolution connected to the closing means.

Avantageusement, le moyen d'actionnement est connecté à un tube d'actionnement qu'il entraine en pivotement autour de son axe.

  • le moyen d'actionnement comprend une chambre présentant une ouverture accessible à l'huile du circuit et montée en rotation contre une force de rappel.
Advantageously, the actuating means is connected to an actuating tube which is pivoted about its axis.
  • the actuating means comprises a chamber having an opening accessible to the oil of the circuit and mounted in rotation against a restoring force.

Le moyen d'actionnement est piloté par l'huile circulant dans le circuit. Cette huile traverse en partie le moyen d'actionnement et est destinée à provoquer son fonctionnement. L'huile pénétrant dans la chambre exerce une pression contre la paroi de ladite chambre qui est alors entrainée en coulissement pour provoquer une modification du volume de la chambre et ainsi une mise en mouvement du moyen d'actionnement.

  • le moyen d'actionnement est aménagé à une extrémité de la rampe d'huile.
The actuating means is controlled by the oil circulating in the circuit. This oil partially passes through the actuating means and is intended to cause its operation. The oil entering the chamber exerts a pressure against the wall of said chamber which is then slid to cause a change in the volume of the chamber and thus a setting in motion of the actuating means.
  • the actuating means is arranged at one end of the oil ramp.

Avantageusement, le tube d'actionnement est relié à une extrémité des moyens de fermeture.

  • les moyens de fermeture des sorties d'alimentation d'huile comportent un tube cylindrique coaxial à la rampe et connecté au tube d'actionnement.
Advantageously, the actuating tube is connected to one end of the closure means.
  • the closing means of the oil supply outlets comprise a cylindrical tube coaxial with the ramp and connected to the actuating tube.

Le mouvement en pivotement du tube d'actionnement est repris par le tube cylindrique.

  • le tube cylindrique des moyens de fermeture est prolongé radialement par des bras portant des palettes adaptées pour fermer et ouvrir au moins partiellement l'une au moins des sorties d'alimentation d'huile.
  • les palettes sont adaptées pour coulisser sur la paroi de la rampe.
The pivotal movement of the actuating tube is taken up by the cylindrical tube.
  • the cylindrical tube of the closing means is extended radially by arms carrying pallets adapted to close and open at least partially at least one of the oil supply outlets.
  • the pallets are adapted to slide on the wall of the ramp.

Le tube cylindrique est avantageusement adapté pour fermer/ouvrir les ouvertures dans la paroi de la rampe d'huile selon un mouvement de coulissement contre ladite paroi.

  • les moyens de fermeture sont mobiles en rotation et/ou en translation dans la rampe.
The cylindrical tube is advantageously adapted to close / open the openings in the wall of the oil ramp in a sliding movement against said wall.
  • the closing means are movable in rotation and / or in translation in the ramp.

Avantageusement, le mouvement de pivotement du tube d'actionnement peut être transformé en un mouvement de translation du tube cylindrique et donc des palettes en coulissement contre la paroi dans le sens longitudinal de la rampe.Advantageously, the pivoting movement of the actuating tube can be converted into a translation movement of the cylindrical tube and therefore of the vanes sliding against the wall in the longitudinal direction of the ramp.

L'invention concerne également un carter de moteur à combustion interne comprenant au moins un circuit d'huile tel que décrit ci-dessus.The invention also relates to an internal combustion engine casing comprising at least one oil circuit as described above.

5. Liste des figures5. List of figures

D'autres objets et avantages de l'invention apparaîtront au cours de la description qui suit, fournie à titre d'exemple de réalisation et faite en référence aux dessins annexés, dans lesquels :

  • La figure 1 est une représentation schématique d'un mode de réalisation de l'invention.
  • La figure 2 est une représentation schématique d'un tube destiné à s'insérer dans une rampe selon le mode de réalisation de l'invention.
  • La figure 3 est une représentation schématique d'un moyen d'actionnement selon l'invention.
Other objects and advantages of the invention will become apparent from the description which follows, provided by way of example of embodiment and with reference to the appended drawings, in which:
  • The figure 1 is a schematic representation of an embodiment of the invention.
  • The figure 2 is a schematic representation of a tube for insertion into a ramp according to the embodiment of the invention.
  • The figure 3 is a schematic representation of an actuating means according to the invention.

6. Description détaillée6. Detailed description

Selon la figure 1, un circuit d'huile est destiné à alimenter en huile divers organes d'un moteur à combustion interne (non représenté) de véhicule automobile. Plus précisément, il permet de lubrifier et de refroidir certains organes dudit moteur. Une pompe aspire donc de l'huile, via une crépine et un module de filtration, contenue dans un carter d'huile, pour alimenter le circuit d'huile du moteur (tous ces éléments ne sont pas représentés). L'huile sortant de la pompe est ensuite injectée sous pression dans une rampe 10 ménagée et formée dans le carter du moteur (non représenté). Cette rampe 10 est dénommée rampe principale en référence à sa fonction d'acheminement de l'huile vers les différents organes et conduits du moteur.According to figure 1 , an oil circuit is intended to supply oil to various components of an internal combustion engine (not shown) of a motor vehicle. More specifically, it allows to lubricate and cool some organs of said engine. A pump therefore sucks oil, via a strainer and a filtration module, contained in an oil sump, to supply the engine oil circuit (all these elements are not shown). The oil exiting the pump is then injected under pressure into a ramp 10 formed and formed in the crankcase of the engine (not shown). This ramp 10 is called the main ramp with reference to its function of routing the oil to the various organs and conduits of the engine.

La rampe 10, illustrée en négatif sur la figure 1 est de forme cylindrique et présente une entrée d'huile 11 et des premières sorties d'huile 12 connectées à des conduits de refroidissement vers différents organes du moteur tels que des gicleurs par exemple et des secondes sorties d'huile 13 connectées à des conduits de circulation d'huile pour lubrifier et/ou alimenter en huile différents organes dudit moteur tels que, les paliers de vilebrequin et les paliers de tête de bielle ainsi que les conduits de la montée vers la culasse (non illustrés). La rampe 10 d'huile est alimentée en permanence par la pompe à huile. Au moins une sortie 12 de la rampe 10 est reliée par un conduit de refroidissement 18 à un gicleur (non représenté) installé dans la paroi d'un cylindre dans lequel coulisse le piston (non illustré) et au moins une sortie 13 de la rampe 10 débouche sur un conduit d'alimentation d'huile des paliers de vilebrequin (non représenté). Les gicleurs sont généralement destinés à injecter un jet d'huile vers le fond des pistons pour leur refroidissement. Le refroidissement des divers organes n'est cependant pas nécessaire à tous les moments du fonctionnement du moteur alors que la lubrification ne doit en aucun cas cesser lorsque ledit moteur est en fonctionnement. A noter que l'invention s'applique pour les moteurs monocylindres ou multicylindres.The ramp 10, shown in negative on the figure 1 is of cylindrical shape and has an oil inlet 11 and first oil outlets 12 connected to cooling ducts to different engine components such as nozzles for example and second oil outlets 13 connected to air ducts. circulation of oil for lubricating and / or supplying oil to various members of said engine such as crankshaft bearings and crank bearings as well as the ducts of the rise to the cylinder head (not shown). The oil ramp 10 is continuously supplied by the oil pump. At least one outlet 12 of the ramp 10 is connected by a cooling duct 18 to a nozzle (not shown) installed in the wall of a cylinder in which the piston slides (not shown) and at least one output 13 of the ramp 10 opens on an oil supply conduit of the crankshaft bearings (not shown). The nozzles are generally intended to inject a jet of oil towards the bottom of the pistons for their cooling. The cooling of the various members is however not necessary at all times of operation of the engine while the lubrication must in no case stop when said engine is in operation. Note that the invention applies to single-cylinder or multicylinder engines.

Selon l'invention, la rampe 10 comporte un dispositif de régulation 14 de débit comprenant des moyens de régulation 15 de débit d'huile vers les organes du moteur. Ces moyens de régulation 15 de débit sont disposés de manière mobile dans la rampe 10 pour fermer et ouvrir au moins partiellement l'une au moins des sorties 12, 13 de la rampe 10. Le dispositif de régulation comporte également des moyens 16 de mise en mouvement pour mettre en mouvement ces moyens 15 de régulation de débit ou de fermeture des sorties 12, 13 de la rampe principale.According to the invention, the ramp 10 comprises a flow control device 14 comprising means 15 for regulating the flow of oil to the engine components. These flow control means 15 are movably arranged in the ramp 10 to close and open at least partially at least one of the outputs 12, 13 of the ramp 10. The regulating device also comprises means 16 for implementing movement for setting in motion these flow control means 15 or closure of the outputs 12, 13 of the main ramp.

Selon un mode de réalisation représenté dans les figures 1 et 2, les moyens de régulation 15 de débit comportent au moins un tube 20 mobile dans la rampe 10 et des palettes 21 portées radialement par des bras 22 depuis le tube 20. Ledit tube 20 est monté coaxial dans la rampe principale 10 et comporte un diamètre inférieur à celui de la rampe principale. Lesdites palettes 21 sont de manière préférentielle des plaques sensiblement rectangulaires aménagées pour obturer de façon étanche les premières sorties 12 connectées aux conduits 18 de circulation d'huile pour le refroidissement dans la rampe 10 lorsqu'elles sont positionnées en vis-à-vis desdites sorties 12. Les secondes sorties 13 connectées à des conduits 19 de lubrification et/ou d'alimentation en huile ne sont pas destinées à être obturées par lesdites palettes, l'huile peut donc circuler en permanence dans lesdits conduits.According to an embodiment shown in Figures 1 and 2 , the flow control means 15 comprise at least one tube 20 movable in the ramp 10 and pallets 21 carried radially by arms 22 from the tube 20. Said tube 20 is mounted coaxially in the main ramp 10 and has a smaller diameter to that of the main ramp. Said pallets 21 are preferably substantially rectangular plates arranged to seal the first outlets 12 connected to the oil circulation ducts 18 for cooling in the ramp 10 when they are positioned vis-à-vis said outputs 12. The second outputs 13 connected to the lubrication and / or oil supply ducts 19 are not intended to be closed by said pallets, the oil can therefore to circulate continuously in said ducts.

Le tube 20 est monté mobile en pivotement autour de son axe de révolution dans la rampe 10 sensiblement d'un quart de tour pour entrainer les palettes 21 en pivotement en coulissement sur la paroi de la rampe 10, pour obturer ou dégager au moins un orifice 12 de la rampe 10 connecté au conduit de refroidissement 18. Ledit tube 20 est relié à une extrémité à des moyens de déplacement 16 qui selon l'exemple proposé consiste en une rotation ou un pivotement. Le tube 20 est de manière préférentielle en acier obtenu par moulage avec un diamètre de l'ordre de 5 mm mais qui peut varier selon le moteur. D'autres matériaux peuvent bien sûr être envisagés, tels qu'un plastique susceptible de résister à la pression et aux températures dans le moteur.The tube 20 is mounted to pivot about its axis of revolution in the ramp 10 substantially by a quarter of a turn to cause the vanes 21 to pivot in sliding on the wall of the ramp 10, to close off or clear at least one orifice 12 of the ramp 10 connected to the cooling duct 18. Said tube 20 is connected at one end to displacement means 16 which according to the proposed example consists of a rotation or a pivoting. The tube 20 is preferably steel obtained by molding with a diameter of the order of 5 mm but which may vary depending on the engine. Other materials can of course be considered, such as a plastic that can withstand the pressure and temperatures in the engine.

La régulation du débit est obtenue en déplaçant le tube 20 à l'intérieur de la rampe 10 de sorte que les sorties 12 de la rampe 10 soient obturées par lesdites palettes 21 lorsque par exemple le moteur est encore froid et ne nécessite pas de refroidissement des organes connectés aux dites sorties 12. Par contre, lorsque le moteur est chaud, les températures desdits organes atteignant des seuils trop élevés, de l'huile doit être injectée vers lesdits organes pour leur refroidissement. La pompe à l'huile envoie de l'huile à plus forte pression dans la rampe principale 10 et les sorties 12 connectées aux conduits de refroidissement 18 doivent être libérées pour la circulation de l'huile vers ces organes.The flow control is obtained by moving the tube 20 inside the ramp 10 so that the outputs 12 of the ramp 10 are closed by said vanes 21 when for example the engine is still cold and does not require cooling of the However, when the engine is hot, the temperatures of said bodies reaching thresholds too high, oil must be injected to said bodies for cooling. The oil pump sends oil at higher pressure to the main boom 10 and the outlets 12 connected to the cooling ducts 18 must be released for the flow of oil to these bodies.

Ainsi, cette solution permet de gérer le débit des gicleurs en fonction de la perte de charge au niveau des passages en vis-à-vis des sorties 12 de la rampe principale 10.Thus, this solution makes it possible to manage the flow rate of the nozzles as a function of the pressure drop at the passages opposite the outlets 12 of the main ramp 10.

Lesdits moyens de déplacement 16 de mise en rotation ou en pivotement des moyens de régulation 15 comprennent un organe d'actionnement 30 taré à la pression d'huile circulant dans le circuit.Said displacement means 16 for rotating or pivoting the regulating means 15 comprise an actuating member 30 calibrated with the oil pressure flowing in the circuit.

Ledit moyen de déplacement 16 représenté en figures 1 et 3 peut comprendre un tube d'actionnement 31 dont le diamètre est sensiblement inférieur au diamètre intérieur de la rampe 10 et monté mobile en rotation dans un élément de réservoir 32 sensiblement cylindrique, le tube d'actionnement 31 est monté de manière préférentielle coaxial avec la rampe principale et mobile en pivotement dans ladite rampe et destiné à coopérer avec le tube 20 des moyens de régulation 15.Said displacement means 16 represented in figures 1 and 3 may comprise an actuating tube 31 whose diameter is substantially smaller than the inside diameter of the ramp 10 and rotatably mounted in a substantially cylindrical reservoir element 32, the actuating tube 31 is preferably mounted coaxially with the ramp main and movable pivotally in said ramp and intended to cooperate with the tube 20 of the regulating means 15.

L'élément de réservoir 32 comprend un carter 33 sensiblement sous forme de cylindre plein comportant une chambre d'actionnement 34 et une ouverture circulaire axiale 35, le diamètre de ladite ouverture axiale 35 étant sensiblement égal au diamètre du tube d'actionnement 31 de manière à entourer ledit tube d'actionnement avec un très faible jeu.The reservoir element 32 comprises a casing 33 substantially in the form of a solid cylinder comprising an actuating chamber 34 and an axial circular opening 35, the diameter of said axial opening 35 being substantially equal to the diameter of the actuating tube 31 to surround said actuating tube with a very small clearance.

La chambre d'actionnement 34 est formée sensiblement par un quartier de cylindre s'étendant depuis l'ouverture circulaire, ledit quartier de cylindre est fermé par deux parois aux extrémités axiales. Ladite chambre d'actionnement 34 s'étend ainsi longitudinalement sur une longueur sensiblement inférieure à la longueur de l'élément de réservoir 32 et angulairement sur un arc de cercle supérieur à 45° et inférieur à 180°.The actuating chamber 34 is formed substantially by a cylinder quarter extending from the circular opening, said cylinder quarter is closed by two walls at the axial ends. Said actuating chamber 34 thus extends longitudinally over a length substantially shorter than the length of the reservoir element 32 and angularly over an arc of greater than 45 ° and less than 180 °.

Le tube d'actionnement 31 comprend une paroi circulaire extérieure 36 et au moins une paroi 37 de séparation sensiblement radiale s'étendant longitudinalement sur ladite paroi circulaire extérieure 36 du tube d'actionnement et adaptée pour partager la chambre d'actionnement 34 en deux parties d'actionnement 38, 39 étanches l'une de l'autre. Le tube d'actionnement 31 comporte une ouverture radiale 40 débouchant d'un côté et à proximité de la paroi de séparation 37 dans une première partie 38 d'actionnement.The actuating tube 31 comprises an outer circular wall 36 and at least one substantially radial separation wall 37 extending longitudinally on said outer circular wall 36 of the actuating tube and adapted to share the actuating chamber 34 in two parts. actuator 38, 39 sealed from one another. The actuating tube 31 has a radial opening 40 opening on one side and near the partition wall 37 in a first actuating portion 38.

Le tube 20 des moyens de régulation est de manière préférentielle enfoncé dans le tube d'actionnement 31 et fixé par soudure dans ledit tube 31 pour que la rotation du tube d'actionnement entraine la rotation du tube 20 des moyens de régulation.The tube 20 of the control means is preferably pressed into the actuating tube 31 and welded in said tube 31 so that the rotation of the actuating tube causes the rotation of the tube 20 of the control means.

Dans la deuxième partie 39 d'actionnement est placé un moyen élastique 41 adapté pour pousser la paroi de séparation 36 de façon à augmenter le volume de la deuxième partie 39 d'actionnement où ledit moyen élastique est positionné. La raideur du moyen élastique 41 est choisie en fonction des niveaux de la pression de l'huile.In the second actuating portion 39 is placed an elastic means 41 adapted to push the partition wall 36 so as to increase the volume of the second actuating portion 39 where said elastic means is positioned. The stiffness of the elastic means 41 is chosen as a function of the levels of the pressure of the oil.

Le moyen d'actionnement 16 est placé à une extrémité de la rampe principale 10 de telle manière que le tube d'actionnement 31 est couplé solidaire du tube 20 des moyens de régulation inséré dans la rampe principale 10 et que l'intérieur du tube d'actionnement 31 est dans le prolongement du circuit d'huile.The actuating means 16 is placed at one end of the main ramp 10 so that the actuating tube 31 is coupled to the tube 20 of the regulation means inserted in the main ramp 10 and that the inside of the tube actuation 31 is in the extension of the oil circuit.

Le carter 33, le tube d'actionnement 31 avec la feuille de séparation 32 peuvent être en acier ou en plastique obtenus par moulage par exemple.The casing 33, the actuating tube 31 with the separating sheet 32 may be made of steel or plastic obtained by molding for example.

De l'huile est injectée dans la rampe principale, arrive ensuite dans le tube d'actionnement 31 et passe par l'ouverture radiale 40 dans le tube d'actionnement 31 pour remplir la première partie 38 de la chambre d'actionnement 34. La raideur du moyen élastique 41 du moyen d'actionnement est telle qu'à partir un certain niveau de pression d'huile, le moyen élastique se rétracte et la paroi de séparation 37 est déplacée dans le sens de la réduction de la deuxième partie 39 de la chambre d'actionnement. Ce mouvement se traduit par une rotation du tube d'actionnement 31 mobile en rotation dans la rampe 10 et donc par une rotation du tube 20 entraînant une ouverture ou fermeture des sorties 12 connectées aux conduits de refroidissement 18.Oil is injected into the main ramp, then arrives in the actuating tube 31 and passes through the radial opening 40 in the actuating tube 31 for filling the first portion 38 of the actuating chamber 34. The stiffness of the elastic means 41 of the actuating means is such that from a certain oil pressure level, the elastic means retracts and the partition wall 37 is moved in the direction of the reduction of the second portion 39 of the actuating chamber. This movement is reflected by a rotation of the actuating tube 31 rotatable in the ramp 10 and thus by a rotation of the tube 20 causing an opening or closing of the outlets 12 connected to the cooling ducts 18.

Le fonctionnement du moyen d'actionnement est simple et ne nécessite pas de source d'énergie supplémentaire.The operation of the actuating means is simple and does not require an additional source of energy.

L'invention n'est pas réduite au mode de réalisation décrit ci-avant et d'autres modes de réalisation peuvent être suggérés dans l'esprit de l'homme du métier. Par exemple le pivotement peut être transformé en un mouvement de translation longitudinal selon l'axe de la rampe principale du tube cylindrique 20 des moyens de régulation.The invention is not reduced to the embodiment described above and other embodiments may be suggested in the art of the art. For example, the pivoting can be converted into a longitudinal translation movement along the axis of the main ramp of the cylindrical tube 20 of the regulating means.

Claims (9)

  1. Oil circuit for an internal combustion engine, the said circuit comprising a cylindrical manifold (10) having an oil inlet (11) and oil outlets (12, 13) for supplying various components of the said engine with oil and comprising an oil flow regulation system comprising means (15) for closing the supply outlets (12, 13) that are set in movement by an actuating means (16), characterized in that the said actuating means is calibrated to a nominal pressure of oil passing through the circuit and able to set in movement the means for closing the oil supply outlets in the event that the nominal oil pressure is exceeded.
  2. Oil circuit according to Claim 1, characterized in that the actuating means (16) comprises a chamber (38) having an opening (40) accessible to the oil of the circuit and mounted in rotation against a return force.
  3. Oil circuit according to either one of Claims 1 and 2, characterized in that the actuating means (16) is arranged at one end of the oil manifold.
  4. Oil circuit according to any one of Claims 1 to 3, characterized in that the actuating means (16) is able to pivot a cylindrical actuating tube (31) connected to the closure means.
  5. Oil circuit according to Claim 4, characterized in that the means (15) for closing the oil supply outlets (12, 13) comprise a cylindrical tube (20) coaxial to the manifold and connected to the actuating tube (31).
  6. Oil circuit according to Claim 5, characterized in that the cylindrical tube (20) of the closure means (15) is prolonged radially by arms (22) bearing blades (21) adapted to at least partially close and open at least one of the oil supply outlets (12).
  7. Oil circuit according to Claim 6, characterized in that the blades (21) are adapted to slide on the wall of the main manifold (10).
  8. Oil circuit according to any one of Claims 1 to 7, characterized in that the closure means (15) are rotatable and/or translatable in the manifold (10).
  9. Motor vehicle internal combustion engine casing, characterized in that it comprises at least one oil circuit according to any one of Claims 1 to 8.
EP14710014.3A 2013-02-15 2014-02-14 Oil circuit for an internal combustion engine with optimised actuating means Active EP2956637B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1351293A FR3002275B1 (en) 2013-02-15 2013-02-15 OIL CIRCUIT FOR INTERNAL COMBUSTION ENGINE WITH OPTIMIZED OPERATING MEANS
PCT/FR2014/050311 WO2014125230A1 (en) 2013-02-15 2014-02-14 Oil circuit for an internal combustion engine with optimised actuating means

Publications (2)

Publication Number Publication Date
EP2956637A1 EP2956637A1 (en) 2015-12-23
EP2956637B1 true EP2956637B1 (en) 2017-03-29

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Application Number Title Priority Date Filing Date
EP14710014.3A Active EP2956637B1 (en) 2013-02-15 2014-02-14 Oil circuit for an internal combustion engine with optimised actuating means

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EP (1) EP2956637B1 (en)
FR (1) FR3002275B1 (en)
WO (1) WO2014125230A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB286088A (en) * 1927-03-02 1928-03-01 William Howell Peacey Improvements in the lubrication of fluid pressure engines
GB594787A (en) * 1944-02-24 1947-11-19 Sulzer Freres Soclete Anonyme Improvements relating to pressure responsive valves
JPH08270443A (en) * 1995-04-03 1996-10-15 Nissan Motor Co Ltd Piston cooling device for internal combustion engine
US20050120982A1 (en) * 2003-12-09 2005-06-09 Detroit Diesel Corporation Separate oil gallery for piston cooling with electronic oil flow control
GB2480474B (en) * 2010-05-20 2016-10-05 Ford Global Tech Llc An oil supply system for an engine
FR2973070B1 (en) 2011-03-24 2015-04-17 Renault Sa OIL SUPPLY SYSTEM OF AN INTERNAL COMBUSTION ENGINE.

Also Published As

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FR3002275B1 (en) 2015-02-20
FR3002275A1 (en) 2014-08-22
WO2014125230A1 (en) 2014-08-21
EP2956637A1 (en) 2015-12-23

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