EP3529467B1 - Oil sump - Google Patents

Oil sump Download PDF

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Publication number
EP3529467B1
EP3529467B1 EP17794377.6A EP17794377A EP3529467B1 EP 3529467 B1 EP3529467 B1 EP 3529467B1 EP 17794377 A EP17794377 A EP 17794377A EP 3529467 B1 EP3529467 B1 EP 3529467B1
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EP
European Patent Office
Prior art keywords
oil
opening
flow
suction tube
oil flow
Prior art date
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Application number
EP17794377.6A
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German (de)
French (fr)
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EP3529467A1 (en
Inventor
Mickaël LECHARTIER
Jean-Claude Quevallier
Jérôme DEMANGEOT
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Novares France SAS
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Novares France SAS
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Publication of EP3529467A1 publication Critical patent/EP3529467A1/en
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Classifications

    • 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
    • F01M11/0004—Oilsumps
    • 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
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/005—Controlling temperature of lubricant
    • F01M5/007—Thermostatic control
    • 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
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
    • 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
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
    • F01M5/021—Conditioning lubricant for aiding engine starting, e.g. heating by heating
    • 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
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
    • F01M5/021—Conditioning lubricant for aiding engine starting, e.g. heating by heating
    • F01M2005/023—Oil sump with partition for facilitating heating of oil during starting
    • 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
    • F01M11/0004—Oilsumps
    • F01M2011/0033—Oilsumps with special means for guiding the return of oil into the sump
    • 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
    • F01M11/0004—Oilsumps
    • F01M2011/0037—Oilsumps with different oil compartments
    • F01M2011/0045—Oilsumps with different oil compartments for controlling the oil temperature
    • 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
    • F01M11/0004—Oilsumps
    • F01M2011/005—Oilsumps with special anti-turbulence means, e.g. anti-foaming means or intermediate plates
    • 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
    • F01M11/0004—Oilsumps
    • F01M2011/007—Oil pickup tube to oil pump, e.g. strainer

Definitions

  • the present invention relates to an oil sump intended to be fixed under the engine block of an internal combustion engine.
  • the main function of an oil pan is to contain the oil needed to lubricate an engine and to dissipate some of the heat generated by the engine.
  • an oil pan comprises a shell which is fixed under the engine block.
  • Examples of oil pans have been described in particular in the documents JP 2011 231662 , JP 2014 139423 , US 2009/145695 , OF 28 52 854 and FROM 199 12 327 .
  • the oil present in the crankcase is sucked up by an oil pump and is propelled towards the various engine parts to be lubricated (for example, the camshafts, the valve stems, the crankshaft bearings, the piston/cylinder, piston/connecting rod, crankshaft/connecting rod, etc. interfaces), then the oil returns to the crankcase by natural runoff or by channeled return depending on the case.
  • an oil pump for example, the camshafts, the valve stems, the crankshaft bearings, the piston/cylinder, piston/connecting rod, crankshaft/connecting rod, etc. interfaces
  • the casing receives in its interior volume a strainer making it possible to stop the solid matter such as filings produced by the components of the engine contained in the oil before they reach the suction port of the pump, and a so-called plate anti-emulsion, whose role is to prevent or limit the movement of the oil in the crankcase, in particular on the free surface of the oil.
  • the engine components When starting the engine, the engine components are at ambient temperature. During the transitional phase of temperature rise towards the optimum operating temperature, the engine does not operate optimally and in particular the fuel consumption turns out to be significantly higher; this is due to the fact that the combustion does not take place at the optimum temperature.
  • a research path aims to reduce the duration of the transient starting phase so that the engine reaches its optimum operating temperature as quickly as possible.
  • the object of the present invention is to provide an oil sump which makes it possible to reduce the heating time of the oil of the lubrication circuit of the engine and therefore to reduce the fuel consumption when starting the engine as well as the carbon dioxide emissions.
  • the invention relates to an oil sump according to claim 1.
  • the invention provides an oil sump which makes it possible to cause the flow of oil returning to the sump (that is to say an oil flow which, in contact with the components which it has lubricated, to is at a temperature which is higher than the temperature of the oil stored in the crankcase which is for its part at a temperature substantially equal to the ambient temperature) a short path by bringing the flow of oil returning directly to the mouth from the oil pump suction tube.
  • the flow of oil returning to the crankcase is directly sucked by the oil pump without having dissipated the heat which it carries in the mass of oil in the crankcase.
  • the invention establishes a bypass of the returning oil flow to conserve the heat it contains and to directly use the returning oil flow to supply the lubrication circuit.
  • the flow of oil drawn in mainly comes from the flow of oil returning from the lubrication circuit. Upon contact with engine parts, the returning oil flow rises in temperature.
  • the flow of oil sucked in during the transient period mainly contains oil heated by the engine components, which accelerates the rise in temperature of the oil sucked in to its optimum operating temperature.
  • the reuse in a loop, during the transient period, of the oil flow returning to the aspirated oil flow makes it possible to accelerate the rise in temperature of the aspirated oil by avoiding cooling caused by the mixing of the oil flow returning to the oil stored in the lower hull.
  • the invention provides an oil sump which makes it possible to reduce the oil life of the engine lubrication circuit.
  • the engine reaches its optimum operating temperature more quickly and therefore reduces the excess fuel consumption during the engine start-up phase as well as reducing carbon dioxide emissions.
  • the bypass tube and the suction tube can open out into a box having an opening allowing the oil stored in the lower shell to be sucked up.
  • the branch tube and the suction tube can include a plate connecting the branch tube and the suction tube, the plate being adapted to be fixed to the housing.
  • the anti-emulsion plate may comprise a gutter in which the opening and the passage orifices are positioned.
  • the gutter may have a suitable slope to promote the flow of oil towards the opening of the anti-emulsion plate.
  • the anti-emulsion plate may have a curved geometry suitable for recovering the oil coming from the engine block.
  • the invention relates to an oil sump 1 intended to be fixed to an engine block.
  • the oil sump 1 comprises in particular a lower shell 2, a suction tube 44 connected at one of its ends to an oil pump and which opens at its second end into the lower shell 2, an anti-emulsion plate 8 and directing means for directing a returning oil flow.
  • a strainer is positioned at the mouth of the suction tube 44 to stop solid matter such as filings produced by the engine components contained in the oil.
  • the lower shell 2 has a substantially parallelepipedal shape with an upper opening 21.
  • the opening 21 is surrounded by a rim 22.
  • the rim 22 has holes 23 allowing the attachment of an anti-emulsion plate 8 to the lower shell 2.
  • the lower shell 2 is adapted to contain oil.
  • the lower shell 2 is made of polymer material.
  • the lower shell 2 could, for example, be made from an aluminum foundry.
  • the anti-emulsion plate 8 is intended to cover the upper opening 21 of the lower shell 2.
  • the anti-emulsion plate 8 is made of polymer material.
  • the anti-emulsion plate 8 could, for example, be made of aluminum.
  • the anti-emulsion plate 8 has a collection portion 81.
  • the collection portion 81 has two fixing flanges 82. Each fixing flange has holes 83 for fixing the anti-emulsion plate 8 to the lower shell 2.
  • the fixing of the anti-emulsion plate 8 to the lower shell 2 can for example be made with bolts or rivets.
  • the collection portion 81 has a substantially semi-cylindrical section.
  • the collection portion 81 comprises a bottom zone offset in the direction of the bottom of the lower shell 2 with respect to the fixing flanges 82.
  • the bottom zone comprises a gutter 84.
  • the gutter 84 has a bottom wall 84a and flanks 84b .
  • oil passage orifices 86 are provided in the sides 84b of the gutter 84.
  • An opening 87 is formed in the bottom wall 84a. On either side of the opening 87, the bottom wall 84a is inclined so that the opening 87 is at the low point of the bottom wall 84a.
  • the opening 87 is closed off by a bimetallic shutter 88 to cause it to pass from its on position to its off position.
  • the bimetallic shutter 88 is movable between an open position in which the opening 87 is through for oil and a closed position in which the bimetallic shutter 88 closes the opening 87.
  • the bimetallic shutter 88 is configured to switch to the closed position when the oil circulating on the anti-emulsion plate 8 reaches or exceeds an optimum engine operating temperature which is usually between 30° C. and 50° C.
  • the gutter 84 comprises a grid 89.
  • the grid 89 has a plurality of micro-perforations which are the passage orifices 86.
  • the opening 87 passes through the grid 89, so that the opening 87 is not obscured by the grid 89.
  • the micro perforations of the grid 89 are configured to be traversed by the oil when the oil reaches or exceeds a defined viscosity associated with a defined temperature.
  • the passage orifices 86 are closed by bimetallic shutters 90.
  • the bimetallic shutters 90 are movable between a closed position in which the bimetallic shutters 90 block the passage orifices 86 and an open position in which the oil can flow into the passage orifices.
  • Bimetallic shutters 90 are adapted to switch to the open position when the oil reaches or exceeds its optimum temperature.
  • the orientation means comprise a branch tube 41.
  • the branch tube 41 opens at a first end into the opening 87 of the anti-emulsion plate 8 and at a second end at the mouth of the suction tube 44.
  • the bypass tube 41 and suction tube 44 open into a box 45.
  • Box 45 has an opening 42 allowing the oil stored in the lower shell 2 to be sucked up.
  • the branch tube 41 and the suction tube 44 include a plate 43 which connects the branch tube 41 and the suction tube 44.
  • the plate is adapted to be fixed to the box 45.
  • the bimetallic shutter 88 when the engine is started, the bimetallic shutter 88 is in the open position because the oil has not yet reached its optimum temperature.
  • the returning flow of oil II flows mainly through the opening 87.
  • the inclination of the bottom wall 84a of the gutter 84 favors the flow of oil towards the opening 87. It is nevertheless possible that a minor amount of oil also flows through ports 86 and falls into lower shell 2. the mouth of the suction tube 44 where it is sucked and becomes the sucked oil stream I.
  • the aspirated oil flow I which passes through the suction tube 44 mainly contains oil coming directly from the engine having already heated in contact with the engine elements
  • the bimetallic shutter 88 goes into the closed position. In this case, all of the returning oil flow flows through ports 86 in the lower shell 2, as shown in the face 7 .
  • the aspirated oil flow I then comes from the lower shell 2 and passes through the opening 42 of the box 45 to cross the suction tube 44.
  • the first embodiment comprises active orientation means, the change of state of which allows the orientation of the returning oil flow II.
  • the returning oil flow flows over the screen 89. Until the returning oil flow has reached or exceeded a set temperature, the returning oil flow cannot pass through the grid 89. In this case, all of the returning oil flow flows through the opening 87 into the bypass tube 41. When the returning oil flow reaches or exceeds a set viscosity, the returning oil flow can pass through the screen 89 and flow through the passage holes 86. The change in viscosity of the oil flow is caused by the change in temperature of the oil flow. The returning oil flow then flows through the passage orifices 86 and through the opening 87. The aspirated oil flow I then partly comes from the lower shell 2 and passes through the opening 42 of the box 45 to pass through the suction tube 44.
  • the second embodiment includes passive orientation means. The change in temperature and fluidity of the oil allows, or not, the flow of returning oil to pass through the screen 89.
  • the second embodiment uses the grid 89 and the bimetallic shutter 88 together.
  • the returning oil flow II flows over the anti-emulsion plate 8.
  • the bimetallic shutters 90 are in the closed position and block the passage orifices 86. During this period, the oil therefore flows through the opening 87 into the bypass tube 41.
  • the bimetallic shutters 90 pass into the open position and the oil flows through the passage orifices 86.
  • the third embodiment comprises active orientation means, the change of state of which allows the orientation of the returning oil flow II.

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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)

Description

La présente invention concerne un carter d'huile destiné à être fixé sous le bloc moteur d'un moteur à combustion interne.The present invention relates to an oil sump intended to be fixed under the engine block of an internal combustion engine.

La principale fonction d'un carter d'huile est de contenir l'huile nécessaire à la lubrification d'un moteur et de dissiper une partie de la chaleur générée par le moteur.The main function of an oil pan is to contain the oil needed to lubricate an engine and to dissipate some of the heat generated by the engine.

De façon classique, un carter d'huile comporte une coque qui est fixée sous le bloc moteur. Des exemples de carter d'huile ont notamment décrits dans les documents JP 2011 231662 , JP 2014 139423 , US 2009/145695 , DE 28 52 854 et DE 199 12 327 .Conventionally, an oil pan comprises a shell which is fixed under the engine block. Examples of oil pans have been described in particular in the documents JP 2011 231662 , JP 2014 139423 , US 2009/145695 , OF 28 52 854 and FROM 199 12 327 .

En cours de fonctionnement, l'huile présente dans le carter est aspirée par une pompe à huile et est propulsée vers les différents organes du moteur à lubrifier (par exemple, les arbres à cames, les tiges de soupapes, les paliers de vilebrequin, les interfaces piston/cylindre, piston/bielle, vilebrequin/bielle, etc.), puis l'huile retourne vers le carter par ruissellement naturel ou par retour canalisé selon les cas.During operation, the oil present in the crankcase is sucked up by an oil pump and is propelled towards the various engine parts to be lubricated (for example, the camshafts, the valve stems, the crankshaft bearings, the piston/cylinder, piston/connecting rod, crankshaft/connecting rod, etc. interfaces), then the oil returns to the crankcase by natural runoff or by channeled return depending on the case.

Le carter reçoit dans son volume intérieur une crépine permettant d'arrêter les matières solides telles que des limailles produites par les organes du moteur contenues dans l'huile avant qu'elles atteignent l'orifice d'aspiration de la pompe, et une plaque dite anti émulsion, dont le rôle est d'empêcher ou de limiter les mouvements de l'huile dans le carter, en particulier à la surface libre de l'huile.The casing receives in its interior volume a strainer making it possible to stop the solid matter such as filings produced by the components of the engine contained in the oil before they reach the suction port of the pump, and a so-called plate anti-emulsion, whose role is to prevent or limit the movement of the oil in the crankcase, in particular on the free surface of the oil.

Au cours de son parcours, l'huile est chauffée par les pièces du moteur et refroidie dans le carter d'huile.During its journey, the oil is heated by the engine parts and cooled in the oil sump.

Lors du démarrage du moteur, les organes du moteur sont à température ambiante. Durant la phase transitoire de montée en température vers la température optimale de fonctionnement, le moteur ne fonctionne pas de manière optimale et en particulier la consommation en carburant s'avère sensiblement plus élevée ; cela est dû au fait que la combustion ne se fait pas à température optimale.When starting the engine, the engine components are at ambient temperature. During the transitional phase of temperature rise towards the optimum operating temperature, the engine does not operate optimally and in particular the fuel consumption turns out to be significantly higher; this is due to the fact that the combustion does not take place at the optimum temperature.

Dans une problématique générale d'optimisation de fonctionnement d'un moteur pour en réduire la consommation, une voie de recherche vise à réduire la durée de la phase transitoire de démarrage pour que le moteur atteigne sa température de fonctionnement optimale le plus rapidement possible.In a general problem of optimizing the operation of an engine to reduce its consumption, a research path aims to reduce the duration of the transient starting phase so that the engine reaches its optimum operating temperature as quickly as possible.

Dans ce contexte, la présente invention a pour objectif de fournir un carter d'huile qui permet de diminuer le temps de chauffe de l'huile du circuit de lubrification du moteur et donc de diminuer la consommation en carburant au démarrage du moteur ainsi que les émissions de dioxyde de carbone.In this context, the object of the present invention is to provide an oil sump which makes it possible to reduce the heating time of the oil of the lubrication circuit of the engine and therefore to reduce the fuel consumption when starting the engine as well as the carbon dioxide emissions.

L'invention concerne un carter d'huile selon la revendication 1.The invention relates to an oil sump according to claim 1.

Ainsi, l'invention fournit un carter d'huile qui permet de faire réaliser au flux d'huile retournant vers le carter (c'est-à-dire un flux d'huile qui, au contact des organes qu'il a lubrifiés, est à une température qui est plus élevée que la température de l'huile stockée dans le carter qui est pour sa part à une température sensiblement égale à la température ambiante) un parcours court en amenant le flux d'huile retournant directement à l'embouchure du tube d'aspiration de la pompe à huile. En d'autres termes, durant la phase de transition de démarrage, le flux d'huile retournant dans le carter est directement aspiré par la pompe à huile sans avoir dissipé la chaleur dont il est porteur dans la masse d'huile du carter. L'invention établit une dérivation du flux d'huile retournant pour conserver la chaleur qu'il contient et pour directement utiliser le flux d'huile retournant pour alimenter le circuit de lubrification.Thus, the invention provides an oil sump which makes it possible to cause the flow of oil returning to the sump (that is to say an oil flow which, in contact with the components which it has lubricated, to is at a temperature which is higher than the temperature of the oil stored in the crankcase which is for its part at a temperature substantially equal to the ambient temperature) a short path by bringing the flow of oil returning directly to the mouth from the oil pump suction tube. In other words, during the starting transition phase, the flow of oil returning to the crankcase is directly sucked by the oil pump without having dissipated the heat which it carries in the mass of oil in the crankcase. The invention establishes a bypass of the returning oil flow to conserve the heat it contains and to directly use the returning oil flow to supply the lubrication circuit.

En effet, durant la période transitoire, le flux d'huile aspiré provient majoritairement du flux d'huile retournant du circuit de lubrification. Au contact des pièces du moteur, le flux d'huile retournant monte en température. Ainsi, le flux d'huile aspiré durant la période transitoire contient majoritairement de l'huile chauffée par les organes du moteur, ce qui accélère la montée en température de l'huile aspirée jusqu'à sa température optimale de fonctionnement. En d'autres termes, la réutilisation en boucle, durant la période transitoire, du flux d'huile retournant en flux d'huile aspiré permet d'accélérer la montée en température de l'huile aspirée en évitant un refroidissement provoqué par le mélange du flux d'huile retournant à l'huile stockée dans la coque inférieure. La rapide montée en température de l'huile aspirée jusqu'à sa température optimale permet de diminuer le temps de chauffe du circuit de lubrification du moteur. Ainsi, l'invention fournit un carter d'huile qui permet de diminuer le temps de l'huile du circuit de lubrification du moteur. Le moteur atteint plus rapidement sa température de fonctionnement optimale et donc permet d'abaisser la surconsommation en carburant lors de la phase de démarrage du moteur ainsi que de réduire les émissions de dioxyde de carbone.In fact, during the transient period, the flow of oil drawn in mainly comes from the flow of oil returning from the lubrication circuit. Upon contact with engine parts, the returning oil flow rises in temperature. Thus, the flow of oil sucked in during the transient period mainly contains oil heated by the engine components, which accelerates the rise in temperature of the oil sucked in to its optimum operating temperature. In other words, the reuse in a loop, during the transient period, of the oil flow returning to the aspirated oil flow makes it possible to accelerate the rise in temperature of the aspirated oil by avoiding cooling caused by the mixing of the oil flow returning to the oil stored in the lower hull. The rapid rise in temperature of the oil sucked in to its optimum temperature makes it possible to reduce the heating time of the engine lubrication circuit. Thus, the invention provides an oil sump which makes it possible to reduce the oil life of the engine lubrication circuit. The engine reaches its optimum operating temperature more quickly and therefore reduces the excess fuel consumption during the engine start-up phase as well as reducing carbon dioxide emissions.

Le tube de dérivation et le tube d'aspiration peuvent déboucher dans un boitier présentant une ouverture permettant à l'huile stockée dans la coque inférieure d'être aspirée.The bypass tube and the suction tube can open out into a box having an opening allowing the oil stored in the lower shell to be sucked up.

Le tube de dérivation et le tube d'aspiration peuvent comprendre une platine reliant le tube de dérivation et le tube d'aspiration, la platine pouvant être adaptée pour être fixée au boitier.The branch tube and the suction tube can include a plate connecting the branch tube and the suction tube, the plate being adapted to be fixed to the housing.

La plaque anti émulsion peut comprendre une gouttière dans laquelle sont positionnés l'ouverture et les orifices de passage.The anti-emulsion plate may comprise a gutter in which the opening and the passage orifices are positioned.

La gouttière peut présenter une pente adaptée pour favoriser l'écoulement d'huile vers l'ouverture de la plaque anti émulsion.The gutter may have a suitable slope to promote the flow of oil towards the opening of the anti-emulsion plate.

La plaque anti émulsion peut présenter une géométrie incurvée adaptée pour récupérer l'huile provenant du bloc moteur.The anti-emulsion plate may have a curved geometry suitable for recovering the oil coming from the engine block.

D'autres caractéristiques et avantages de l'invention se dégageront de la description qui va suivre en regard des dessins annexés qui représentent deux formes de réalisation de l'invention.

  • La figure 1 est une vue en perspective d'un carter selon l'invention ;
  • La figure 2 est une vue en perspective d'un premier mode de réalisation non conforme à l'invention d'une plaque anti émulsion reliée à un tube de dérivation ;
  • La figure 3 est une vue en perspective d'un deuxième mode de réalisation d'une plaque anti émulsion selon l'invention ;
  • La figure 4 est une vue en coupe, en perspective, d'un premier mode de réalisation d'un tube de dérivation et d'un tube d'aspiration selon l'invention ;
  • La figure 5 est une vue en coupe, en perspective, d'un deuxième mode de réalisation d'un tube de dérivation et d'un tube d'aspiration selon l'invention ;
  • Les figures 6 et 7 sont des représentations schématiques du fonctionnement d'un carter d'huile selon l'invention comprenant une plaque anti émulsion selon un premier mode de réalisation ;
  • Les figures 8 et 9 sont des représentations schématiques du fonctionnement d'un troisième mode de réalisation non conforme à l'invention d'un carter d'huile.
Other characteristics and advantages of the invention will emerge from the description which will follow with reference to the appended drawings which represent two embodiments of the invention.
  • The figure 1 is a perspective view of a housing according to the invention;
  • The figure 2 is a perspective view of a first embodiment not in accordance with the invention of an anti-emulsion plate connected to a branch tube;
  • The picture 3 is a perspective view of a second embodiment of an anti-emulsion plate according to the invention;
  • The figure 4 is a sectional view, in perspective, of a first embodiment of a branch tube and a suction tube according to the invention;
  • The figure 5 is a sectional view, in perspective, of a second embodiment of a branch tube and a suction tube according to the invention;
  • The figures 6 and 7 are schematic representations of the operation of an oil pan according to the invention comprising an anti-emulsion plate according to a first embodiment;
  • The figures 8 and 9 are schematic representations of the operation of a third embodiment not in accordance with the invention of an oil sump.

En référence à la figure 1, l'invention concerne un carter d'huile 1 destiné à être fixé à un bloc moteur.With reference to the figure 1 , the invention relates to an oil sump 1 intended to be fixed to an engine block.

Le carter d'huile 1 comprend notamment une coque inférieure 2, un tube d'aspiration 44 relié à l'une de ses extrémités à une pompe à huile et qui débouche à sa deuxième extrémité dans la coque inférieure 2, une plaque anti émulsion 8 et des moyens d'orientation qui permettent d'orienter un flux d'huile retournant. Une crépine est positionnée à l'embouchure du tube d'aspiration 44 pour arrêter les matières solides telles que des limailles produites par les organes du moteur contenues dans l'huile.The oil sump 1 comprises in particular a lower shell 2, a suction tube 44 connected at one of its ends to an oil pump and which opens at its second end into the lower shell 2, an anti-emulsion plate 8 and directing means for directing a returning oil flow. A strainer is positioned at the mouth of the suction tube 44 to stop solid matter such as filings produced by the engine components contained in the oil.

La coque inférieure 2 présente une forme sensiblement parallélépipédique avec une ouverture supérieure 21. L'ouverture 21 est entourée par un rebord 22. Le rebord 22 présente des perçages 23 permettant la fixation d'une plaque anti émulsion 8 à la coque inférieure 2. La coque inférieure 2 est adaptée pour contenir de l'huile. Selon l'exemple ici présenté, la coque inférieure 2 est réalisée en matériau polymère. Selon d'autres modes de réalisation la coque inférieure 2 pourrait, par exemple, être réalisée en fonderie d'aluminium.The lower shell 2 has a substantially parallelepipedal shape with an upper opening 21. The opening 21 is surrounded by a rim 22. The rim 22 has holes 23 allowing the attachment of an anti-emulsion plate 8 to the lower shell 2. The lower shell 2 is adapted to contain oil. According to the example presented here, the lower shell 2 is made of polymer material. According to other embodiments, the lower shell 2 could, for example, be made from an aluminum foundry.

La plaque anti émulsion 8 est destinée à recouvrir l'ouverture supérieure 21 de la coque inférieure 2. Selon l'exemple ici présenté, la plaque anti émulsion 8 est réalisée en matériau polymère. Selon d'autres modes de réalisation la plaque anti émulsion 8 pourrait, par exemple, être réalisée en aluminium. La plaque anti émulsion 8 présente une portion de collecte 81. La portion de collecte 81 présente deux rebords de fixation 82. Chaque rebord de fixation présente des perçages 83 de fixation de la plaque anti émulsion 8 à la coque inférieure 2. La fixation de la plaque anti émulsion 8 à la coque inférieure 2 peut par exemple être réalisée avec des boulons ou des rivets. La portion de collecte 81 présente une section sensiblement hémicylindrique. La portion de collecte 81 comprend une zone de fond décalée en direction du fond de la coque inférieure 2 par rapport aux rebords de fixation 82. La zone de fond comprend une gouttière 84. La gouttière 84 présente une paroi de fond 84a et des flancs 84b.The anti-emulsion plate 8 is intended to cover the upper opening 21 of the lower shell 2. According to the example presented here, the anti-emulsion plate 8 is made of polymer material. According to other embodiments, the anti-emulsion plate 8 could, for example, be made of aluminum. The anti-emulsion plate 8 has a collection portion 81. The collection portion 81 has two fixing flanges 82. Each fixing flange has holes 83 for fixing the anti-emulsion plate 8 to the lower shell 2. The fixing of the anti-emulsion plate 8 to the lower shell 2 can for example be made with bolts or rivets. The collection portion 81 has a substantially semi-cylindrical section. The collection portion 81 comprises a bottom zone offset in the direction of the bottom of the lower shell 2 with respect to the fixing flanges 82. The bottom zone comprises a gutter 84. The gutter 84 has a bottom wall 84a and flanks 84b .

Selon un premier mode de réalisation non conforme à l'invention, des orifices de passage 86 d'huile sont ménagés dans les flancs 84b de la gouttière 84.According to a first embodiment not in accordance with the invention, oil passage orifices 86 are provided in the sides 84b of the gutter 84.

Une ouverture 87 est ménagée dans la paroi de fond 84a. De part et d'autre de l'ouverture 87, la paroi de fond 84a est inclinée de sorte que l'ouverture 87 soit au point bas de la paroi de fond 84a.An opening 87 is formed in the bottom wall 84a. On either side of the opening 87, the bottom wall 84a is inclined so that the opening 87 is at the low point of the bottom wall 84a.

Selon le premier mode de réalisation, présenté figure 2, l'ouverture 87 est obturée par un obturateur à bilame 88 pour la faire passer de sa position passante à sa position non passante. L'obturateur à bilame 88 est mobile entre une position ouverte dans laquelle l'ouverture 87 est passante pour de l'huile et une position fermée dans laquelle l'obturateur à bilame 88 obture l'ouverture 87. L'obturateur à bilame 88 est configuré pour passer en position fermée lorsque l'huile circulant sur la plaque anti émulsion 8 atteint ou dépasse une température optimale de fonctionnement du moteur qui est comprise usuellement entre 30 °C et 50°C.According to the first embodiment, presented figure 2 , the opening 87 is closed off by a bimetallic shutter 88 to cause it to pass from its on position to its off position. The bimetallic shutter 88 is movable between an open position in which the opening 87 is through for oil and a closed position in which the bimetallic shutter 88 closes the opening 87. The bimetallic shutter 88 is configured to switch to the closed position when the oil circulating on the anti-emulsion plate 8 reaches or exceeds an optimum engine operating temperature which is usually between 30° C. and 50° C.

Selon un deuxième mode de réalisation, représenté sur la figure 3, la gouttière 84 comprend une grille 89. La grille 89 présente une pluralité de micros perforations qui sont les orifices de passage 86. L'ouverture 87 traverse la grille 89, de sorte que l'ouverture 87 n'est pas occultée par la grille 89. Les micros perforations de la grille 89 sont configurés pour être traversés par l'huile lorsque l'huile atteint ou dépasse une viscosité définie associée à une température définie.According to a second embodiment, shown in the picture 3 , the gutter 84 comprises a grid 89. The grid 89 has a plurality of micro-perforations which are the passage orifices 86. The opening 87 passes through the grid 89, so that the opening 87 is not obscured by the grid 89. The micro perforations of the grid 89 are configured to be traversed by the oil when the oil reaches or exceeds a defined viscosity associated with a defined temperature.

Selon un troisième mode de réalisation non conforme à l'invention, représenté sur les figures 8 et 9, les orifices de passage 86 sont obturés par des obturateurs à bilames 90. Les obturateurs à bilame 90 sont mobiles entre une position fermée dans laquelle les obturateurs à bilame 90 obturent les orifices de passage 86 et une position ouverte dans laquelle l'huile peut s'écouler dans les orifices de passage. Les obturateurs à bilame 90 sont adaptés pour passer en position ouverte lorsque l'huile atteint ou dépasse sa température optimale.According to a third embodiment not in accordance with the invention, represented on the figures 8 and 9 , the passage orifices 86 are closed by bimetallic shutters 90. The bimetallic shutters 90 are movable between a closed position in which the bimetallic shutters 90 block the passage orifices 86 and an open position in which the oil can flow into the passage orifices. Bimetallic shutters 90 are adapted to switch to the open position when the oil reaches or exceeds its optimum temperature.

Les moyens d'orientation comprennent un tube de dérivation 41. Le tube de dérivation 41 débouche à une première extrémité dans l'ouverture 87 de la plaque anti émulsion 8 et à une deuxième extrémité à l'embouchure du tube d'aspiration 44. Le tube de dérivation 41 et le tube d'aspiration 44 débouchent dans un boitier 45. Le boitier 45 présente une ouverture 42 permettant à l'huile stockée dans la coque inférieure 2 d'être aspirée.The orientation means comprise a branch tube 41. The branch tube 41 opens at a first end into the opening 87 of the anti-emulsion plate 8 and at a second end at the mouth of the suction tube 44. The bypass tube 41 and suction tube 44 open into a box 45. Box 45 has an opening 42 allowing the oil stored in the lower shell 2 to be sucked up.

Le tube de dérivation 41 et le tube d'aspiration 44 comprennent une platine 43 qui relie le tube de dérivation 41 et le tube d'aspiration 44. La platine est adaptée pour être fixée au boitier 45.The branch tube 41 and the suction tube 44 include a plate 43 which connects the branch tube 41 and the suction tube 44. The plate is adapted to be fixed to the box 45.

En conditions d'utilisation, lorsque le moteur est à l'arrêt, la majorité de l'huile se trouve dans la coque inférieure 2 du carter d'huile 1. A partir du démarrage du moteur, un flux d'huile aspiré I est aspiré à travers le tube d'aspiration 44 par la pompe à huile. L'huile circule dans les pièces du moteur pour en assurer la lubrification. A son retour, le flux d'huile retournant II tombe sur la plaque anti émulsion 8.In conditions of use, when the engine is stopped, the majority of the oil is in the lower shell 2 of the oil sump 1. From the start of the engine, a flow of oil drawn in I is sucked through the suction tube 44 by the oil pump. Oil circulates through engine parts to provide lubrication. On its return, the returning oil flow II falls on the anti-emulsion plate 8.

Selon le premier mode de réalisation, dont le fonctionnement est présenté sur les figures 6 et 7, au démarrage du moteur, l'obturateur à bilame 88 est en position ouverte car l'huile n'a pas encore atteint sa température optimale. Le flux d'huile retournant II s'écoule majoritairement à travers l'ouverture 87. L'inclinaison de la paroi de fond 84a de la gouttière 84 favorise l'écoulement de l'huile vers l'ouverture 87. Il est néanmoins possible qu'une quantité mineure d'huile s'écoule aussi par les orifices 86 et tombe dans la coque inférieure 2. Le flux d'huile retournant Il qui s'écoule par l'ouverture 87 traverse le tube de dérivation 41 et s'écoule à l'embouchure du tube d'aspiration 44 où il est aspiré et devient le flux d'huile aspiré I.According to the first embodiment, the operation of which is presented on the figures 6 and 7 , when the engine is started, the bimetallic shutter 88 is in the open position because the oil has not yet reached its optimum temperature. The returning flow of oil II flows mainly through the opening 87. The inclination of the bottom wall 84a of the gutter 84 favors the flow of oil towards the opening 87. It is nevertheless possible that a minor amount of oil also flows through ports 86 and falls into lower shell 2. the mouth of the suction tube 44 where it is sucked and becomes the sucked oil stream I.

Ainsi, le flux d'huile aspiré I qui traverse le tube d'aspiration 44 contient principalement de l'huile provenant directement du moteur ayant déjà chauffée au contact des éléments du moteur Lorsque le flux d'huile retournant II présent sur la plaque anti émulsion atteint ou dépasse sa température optimale, l'obturateur à bilame 88 passe en position fermée. Dans ce cas, tout le flux d'huile retournant s'écoule par les orifices 86 dans la coque inférieure 2, comme représenté sur la figure 7. Le flux d'huile aspiré I provient alors de la coque inférieure 2 et passe par l'ouverture 42 du boitier 45 pour traverser le tube d'aspiration 44.Thus, the aspirated oil flow I which passes through the suction tube 44 mainly contains oil coming directly from the engine having already heated in contact with the engine elements When the oil flow returning II present on the anti-emulsion plate reaches or exceeds its optimum temperature, the bimetallic shutter 88 goes into the closed position. In this case, all of the returning oil flow flows through ports 86 in the lower shell 2, as shown in the face 7 . The aspirated oil flow I then comes from the lower shell 2 and passes through the opening 42 of the box 45 to cross the suction tube 44.

Ainsi, le premier mode de réalisation comprend des moyens d'orientation actifs dont le changement d'état permet l'orientation du flux d'huile retournant II.Thus, the first embodiment comprises active orientation means, the change of state of which allows the orientation of the returning oil flow II.

Selon le deuxième mode de réalisation, le flux d'huile retournant s'écoule sur la grille 89. Tant que le flux d'huile retournant n'a pas atteint ou dépassé une température définie, le flux d'huile retournant ne peut traverser la grille 89. Dans ce cas, tout le flux d'huile retournant s'écoule par l'ouverture 87 dans le tube de dérivation 41. Lorsque le flux d'huile retournant atteint ou dépasse une viscosité définie, le flux d'huile retournant peut traverser la grille 89 et s'écouler par les orifices de passage 86. Le changement de viscosité du flux d'huile est provoqué par le changement de température du flux d'huile. Le flux d'huile retournant s'écoule alors par les orifices de passage 86 et par l'ouverture 87. Le flux d'huile aspiré I provient alors pour partie de la coque inférieure 2 et passe par l'ouverture 42 du boitier 45 pour traverser le tube d'aspiration 44. Ainsi, le deuxième mode de réalisation comprend des moyens d'orientation passifs. Le changement de température et de fluidité de l'huile permet, ou non, au flux d'huile retournant de traverser la grille 89.According to the second embodiment, the returning oil flow flows over the screen 89. Until the returning oil flow has reached or exceeded a set temperature, the returning oil flow cannot pass through the grid 89. In this case, all of the returning oil flow flows through the opening 87 into the bypass tube 41. When the returning oil flow reaches or exceeds a set viscosity, the returning oil flow can pass through the screen 89 and flow through the passage holes 86. The change in viscosity of the oil flow is caused by the change in temperature of the oil flow. The returning oil flow then flows through the passage orifices 86 and through the opening 87. The aspirated oil flow I then partly comes from the lower shell 2 and passes through the opening 42 of the box 45 to pass through the suction tube 44. Thus, the second embodiment includes passive orientation means. The change in temperature and fluidity of the oil allows, or not, the flow of returning oil to pass through the screen 89.

Selon l'invention, le deuxième mode de réalisation utilise conjointement la grille 89 et l'obturateur à bilame 88.According to the invention, the second embodiment uses the grid 89 and the bimetallic shutter 88 together.

Selon le troisième mode de réalisation non conforme à l'invention, le flux d'huile retournant II s'écoule sur la plaque anti-émulsion 8. Tant que l'huile n'a pas atteint sa température optimale, les obturateurs à bilame 90 sont en position fermée et obturent les orifices de passage 86. Durant cette période, l'huile s'écoule donc par l'ouverture 87 dans le tube de dérivation 41. Lorsque le flux d'huile retournant II atteint ou dépasse sa température optimale de fonctionnement, les obturateurs à bilame 90 passent en position ouverte et l'huile s'écoule par les orifices de passage 86.According to the third embodiment not in accordance with the invention, the returning oil flow II flows over the anti-emulsion plate 8. As long as the oil has not reached its optimum temperature, the bimetallic shutters 90 are in the closed position and block the passage orifices 86. During this period, the oil therefore flows through the opening 87 into the bypass tube 41. When the returning oil flow II reaches or exceeds its optimum temperature of operation, the bimetallic shutters 90 pass into the open position and the oil flows through the passage orifices 86.

Ainsi, le troisième mode de réalisation comprend des moyens d'orientation actifs dont le changement d'état permet l'orientation du flux d'huile retournant II.Thus, the third embodiment comprises active orientation means, the change of state of which allows the orientation of the returning oil flow II.

Il est possible de combiner le premier et le troisième mode de réalisation.It is possible to combine the first and the third embodiment.

Claims (6)

  1. An oil sump (1) comprising a lower shell (2) intended to contain lubricating oil of an engine, wherein an oil flow, called the suction oil flow (I), is sucked by a suction tube (44) to supply a lubricating circuit and an oil flow, called the return oil flow (II), falls into the oil sump (1), and also comprising an anti-emulsion plate (8) disposed in the oil sump (1) and orientation means allowing orienting at least part of the return oil flow (II) towards an area located at the mouth of the suction tube (44) for a transient period during which the oil has a temperature below an optimum operating temperature, the orientation means comprising a bypass tube (41) leading at a first end into an opening (87) of the anti-emulsion plates (8) and at a second end to the mouth of the suction tube (44), characterized in that the anti-emulsion plate (8) has a series of orifices (86) for passage of the return oil flow (II) to the lower shell (2), in that the orientation means also comprise a bimetallic shutter (88) positioned in the opening (87) of the anti-emulsion plate (8), the bimetallic shutter (88) being movable between an open position in which oil can flow into the opening (87) and a closed position in which the bimetallic shutter (88) shuts off the opening (87), the bimetallic shutter (88) being adapted to switch into the closed position when the oil reaches or exceeds its optimum temperature, and in that the orientation means also comprise a grid (89), the grid (89) having a plurality of micro perforations which are said passage orifices (86), the micro perforations being configured to be crossed by oil reaching or exceeding a determined viscosity, so that as long as the return oil flow has not reached or exceeded a defined temperature, the return oil flow cannot pass through the grid (89).
  2. The oil sump (1) according to claim 1, characterized in that the bypass tube (41) and the suction tube (44) lead into a case (45) having an opening (42) allowing the oil stored in the lower shell (2) to be sucked.
  3. The oil sump (1) according to any of claims 1 and 2, characterized in that the bypass tube (41) and the suction tube (44) comprise a subplate (43) connecting the bypass tube (41) and the suction tube (44), the subplate (43) being adapted to be fastened to the case (45).
  4. The oil sump (1) according to any of claims 1 to 3, characterized in that the anti-emulsion plate (8) comprises a gutter (84) in which are positioned the opening (87) and the passage orifices (86).
  5. The oil sump (1) according to claim 4, characterized in that the gutter (84) has a slope adapted to promote the oil flow towards the opening (87) of the anti-emulsion plate (8).
  6. The oil sump (1) according to any of claims 1 to 5, characterized in that the anti-emulsion plate (8) has a curved geometry adapted to recover the oil from the engine block.
EP17794377.6A 2016-10-18 2017-10-12 Oil sump Active EP3529467B1 (en)

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FR1660104A FR3057610B1 (en) 2016-10-18 2016-10-18 OIL PAN
PCT/FR2017/052816 WO2018073513A1 (en) 2016-10-18 2017-10-12 Oil sump

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FR3057610A1 (en) 2018-04-20
FR3057610B1 (en) 2019-11-22
CN109891063A (en) 2019-06-14
CN109891063B (en) 2021-07-27
ES2913230T3 (en) 2022-06-01
US11022011B2 (en) 2021-06-01
WO2018073513A1 (en) 2018-04-26
US20190264589A1 (en) 2019-08-29
EP3529467A1 (en) 2019-08-28

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