EP4124728A1 - Oil sump comprising a device for heating oil - Google Patents
Oil sump comprising a device for heating oil Download PDFInfo
- Publication number
- EP4124728A1 EP4124728A1 EP22186539.7A EP22186539A EP4124728A1 EP 4124728 A1 EP4124728 A1 EP 4124728A1 EP 22186539 A EP22186539 A EP 22186539A EP 4124728 A1 EP4124728 A1 EP 4124728A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- oil sump
- heating element
- temperature
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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- 239000003921 oil Substances 0.000 claims abstract description 203
- 239000000839 emulsion Substances 0.000 claims abstract description 36
- 238000005461 lubrication Methods 0.000 claims abstract description 12
- 230000001052 transient effect Effects 0.000 claims abstract description 6
- 239000010687 lubricating oil Substances 0.000 claims abstract description 3
- 238000007639 printing Methods 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000013528 metallic particle Substances 0.000 claims description 5
- 239000000049 pigment Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 3
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000004952 Polyamide Substances 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- -1 poly(ethylene terephthalate) Polymers 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229940082150 encore Drugs 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000007649 pad printing Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000005921 Cynara humilis Nutrition 0.000 description 1
- 240000002228 Cynara humilis Species 0.000 description 1
- 101150006573 PAN1 gene Proteins 0.000 description 1
- 241000287107 Passer Species 0.000 description 1
- 241000920340 Pion Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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Images
Classifications
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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
- 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
- F01M5/02—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
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 sump comprises a shell which is fixed under the engine block.
- 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 oil is heated by the engine parts and is cooled in the oil sump, when it mixes with the oil present in said sump.
- 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 transitional phase of starting 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 comprising a lower shell intended to contain the lubricating oil of an engine block, in which an oil flow, called aspirated oil flow, is sucked via a suction tube to supply a lubrication circuit and an oil flow, called the returning oil flow, which falls into the oil sump.
- the oil pan includes an anti-emulsion plate disposed in the oil pan and orientation means making it possible to direct at least part of the flow of oil returning towards a zone located at the mouth of the suction tube during a transient period during which the oil has a temperature lower than an optimum temperature of functioning.
- the oil pan further includes a heater adapted to supply thermal energy to said at least a portion of the returning oil flow, said heater including at least one positive temperature coefficient heater.
- 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 engine components that it has lubricated, 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 of the oil pump suction tube.
- the flow of oil returning to the sump is directly sucked up by the oil pump without having dissipated the heat which it carries in the mass of oil in the sump.
- 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 closed loop, during the transient period, of the oil flow returning to the sucked oil flow makes it possible to accelerate the rise in temperature of the sucked 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 heating time of the oil 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 invention also makes it possible to increase the temperature of the returning oil flow by means of a heating device integrated in the oil sump.
- the heater is configured to heat the returning oil stream before it is reinjected into the engine.
- the oil sump thus configured will further reduce the time of heats the oil in the engine's lubrication circuit and therefore reduces fuel consumption when starting the engine as well as carbon dioxide emissions.
- a heating device comprising a heating element with a positive temperature coefficient will also make it possible to prevent the oil in the lubrication circuit from exceeding the optimum operating temperature of the engine.
- the heating element with a positive temperature coefficient having a threshold temperature beyond which its resistance increases exponentially it will then be possible to choose a heating element with a positive temperature coefficient whose threshold temperature is substantially equal to optimum engine operating temperature.
- the resistance of the heating element will increase in such a way that it will greatly reduce, or even completely cancel the thermal energy supplied by the heating element, thereby stopping the increase in oil temperature.
- Self-regulation of the temperature of the oil flow returning will therefore be easily obtained by means of this heating element with a positive temperature coefficient, without the need to use temperature sensors to control the temperature of the oil returning from the engine in the oil pan.
- 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 fixed on the lower shell 2 and orientation means which allow to direct a flow of oil returning.
- 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 is adapted to contain oil. It is open on its upper face. It may be made of polymer material or aluminum.
- the anti-emulsion plate 8 is intended to cover the upper opening of the lower shell 2.
- the anti-emulsion plate 8 may be made of polymer material or aluminum.
- An opening 87 is formed in the anti-emulsion plate 8.
- the internal walls 84a, 84b of the anti-emulsion plate 8 are inclined on either side of the opening 87 so that the opening 87 defines a low point for the anti-emulsion plate 8.
- 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, shown in the picture 1a , in which the opening 87 is through for oil and a closed position, represented on the figure 2a , in which the bimetallic shutter 88 closes the opening 87.
- the bimetallic shutter 88 is configured to pass into the closed position when the oil circulating on the anti-emulsion plate 8 reaches or exceeds an optimum operating temperature of the engine which is usually between 30°C and 50°C.
- 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 branch tube 41 and the suction tube 44 open into a box 45.
- the box 45 has an opening 42 allowing the oil stored in the lower shell 2 to be sucked up.
- the oil sump 1 also comprises a heating device 10 intended to heat the oil circulating on the anti-emulsion plate 8.
- this heating device 10 is formed by one or more heating elements with a temperature coefficient positive, the threshold temperature of which is substantially equal to the optimum operating temperature of the engine. This or these heating elements 10 at least partially cover the internal walls 84a, 84b of the anti-emulsion plate 8 so that the oil flowing in the direction of the opening 87 along the internal walls 84a, 84b is heated by heating elements 10.
- 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. Returning oil flow II flows predominantly through opening 87. Returning oil flow II flowing through opening 87 passes through branch tube 41 and flows to the mouth of the tube suction 44 where it is sucked and becomes the sucked oil stream I.
- the aspirated flow of oil 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, but also in contact with the heating device 10.
- the bimetallic shutter 88 switches to the closed position and the heating device 10 ceases to heat the flow of returning oil II.
- all the returning oil flow II flows into the lower hull 2 through other outlets (not shown) of the anti-emulsion plate 8 which are located at a higher level with respect to the opening 87
- the aspirated flow of oil 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 active orientation means allowing the orientation of the returning oil flow II consist of a bimetallic shutter 88 arranged at the level of the opening 87.
- these active orientation means may be supplemented or replaced by bimetallic shutters arranged at the level of the other outlet orifices (mentioned above) of the anti-emulsion plate 8. These bimetallic shutters will be movable between a closed position in which they will close said outlet ports and an open position in which oil can flow through said outlet ports. These shutters will be configured to switch to the open position when the oil reaches or exceeds the optimum operating temperature for the engine.
- 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 fixed on the lower shell 2 and orientation means which allow to direct a flow of oil returning.
- 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.
- This second embodiment differs from that represented on the figures 1a and 2a by the fact that the opening 87 is not closed by a bimetallic shutter and by the fact that the branch tube 41 is provided with an opening 89 communicating the interior of the branch tube 41 with the lower shell 2
- a bimetallic shutter 88 is arranged at the level of opening 89.
- This bimetallic shutter 88 is movable between a closed position, represented on the figure 1b , in which the bimetallic shutter 88 closes the opening 89, and an open position, represented on the figure 2b , in which the opening 89 is through for oil.
- the bimetallic shutter 88 is configured to switch to the open position when the oil circulating in the bypass tube reaches or exceeds an optimum engine operating temperature which is usually between 30°C and 50°C.
- the bimetallic shutter 88 When the engine is started, the bimetallic shutter 88 is in the closed position because the oil has not yet reached its optimum temperature. Returning oil flow II flows predominantly through opening 87, then along bypass tube 41. Returning oil flow II circulating in bypass tube 41 then flows to the mouth of the suction tube 44 where it is sucked and becomes the sucked oil stream I.
- the aspirated flow of oil 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, but also in contact with the heating device 10.
- the bimetallic shutter 88 switches to the open position and the heating device 10 ceases to heat the flow of returning oil II.
- all the returning oil flow II flows into the lower hull 2 through the opening 89 of the bypass tube 41.
- the sucked oil flow I then comes from the lower hull 2 and passes through the opening 42 of the housing 45 to pass through the suction tube 44.
- This anti-emulsion plate 8 has in particular a collection portion 81.
- the collection portion 81 has two flanges 82.
- the fixing of the anti-emulsion plate 8 to the lower shell 2 can for example be carried out with bolts or rivets.
- the collection portion 81 comprises a bottom wall 84 offset in the direction of the bottom of the lower shell 2 with respect to the flanges 82.
- An oil passage opening 87 is made in the bottom wall 84. This opening 87 communicates with a branch tube 41 disposed under the anti-emulsion plate 8.
- the branch tube 41 is provided with several openings 89 (as shown in the figure 3b ).
- these openings 89 are closed off by a bimetal shutter 88 whereas, in the position represented on the figure 3b , these openings 89 are conductive, the bimetal shutter 88 having undergone a deformation under the effect of the hot oil circulating inside the bypass tube 41 and whose temperature is greater than a threshold temperature usually between 30 °C and 50°C
- a heating device 10 consisting of a substantially flat heating element is fixed to the bottom wall 84 so as to cover it almost entirely, leaving however the opening 87 visible.
- the fixing of the heating element 10 on the bottom wall 84 can be effected by riveting by means of centering pins 86 fitting into fixing holes 13 of the heating element 10.
- this heating element 10 may also be glued to the bottom wall 84 or printed directly on the latter, for example by a printing technique chosen from screen printing, pad printing or jet printing. ink.
- This heating element 10 may in particular be covered with a protective varnish to prevent corrosion linked to the environment (oil and oil vapor) in which this heating element will be immersed or its damage during transport or handling of this casing. .
- This varnish may be made from poly(ethylene terephthalate) (PET) or polyamide (PA).
- This heating element 10 is formed of a flexible and electrically insulating base support 11, for example made of plastic material, in particular based on poly(ethylene terephthalate) (PET ) or polyamide (PA), on which two conductive tracks 12, 14 have been deposited, namely a so-called “negative” conductive track 12 and a so-called “positive” conductive track 14.
- PET poly(ethylene terephthalate)
- PA polyamide
- the deposition can in particular be carried out by printing a conductive ink, the conductive ink comprising metallic particles, such as silver or copper particles.
- Each conductive track 12, 14 is formed of a main track, respectively 120, 140, and of a plurality of secondary tracks, respectively 121-126 and 141-146, extending parallel from each conductive track 12, 14.
- Each secondary track 121-126 of negative conductive track 12 is parallel and adjacent to a secondary track 141-146 of positive conductive track 14.
- Each pair of mutually adjacent secondary tracks of the negative and positive conductive tracks (e.g. the pair of secondary 124-143 on the picture 3 ) is connected by means of a plurality of resistive strips 15.
- Each resistive strip 15 advantageously consists at least partially of an ink with a positive temperature coefficient, the ink being able to be printed on the base support 10 by screen printing, pad printing or inkjet printing.
- the positive temperature coefficient ink may for example comprise a pigment chosen from barium carbonate, titanium oxide, carbon nanotubes or graphene.
- This type of pigment in fact gives the ink an electrical resistance which increases exponentially with the temperature when the temperature to which the ink is subjected exceeds a threshold temperature. In practice, this threshold temperature is between 50°C and 150°C.
- the heating element 10 is in the form of a flexible printed circuit whose negative and positive conductive tracks 12, 14 extend from an end zone 101 to a heating zone 102 formed mainly by the secondary tracks 121-126, 141-146 connected by conductive strips 15.
- Each conductive track 12, 14 will be supplied with electric current via an electrical connection terminal (not shown), respectively negative and positive, electrically connected to the conductive tracks 12, 14 at the level of the end zone 101 and intended to be electrically connected to a source of electric power.
- a source of electric power connected to terminals + and - causes an electric current i to pass in conductive tracks 12 and 14 through resistor R formed by heating device 10.
- the resistance R of the heater 10 increases due to the characteristics of the positive temperature coefficient heating element and, therefore, the heat P transmitted by the device heating device 10 decreases inversely proportionally: self-regulation of the heating power delivered by the heating device 10 is thus achieved.
- the bimetallic shutter 88 switches to the open position to close the bypass tube 41 and the flow of oil II, which was previously redirected to flow d
- the sucked oil I now flows directly into the lower shell 2, bypassing the bypass tube 41.
- switch means 16 are provided between the electric power source and the heating device 10. These switch means 16 are intended to control the supply of electric current i to the heating device 10 depending on oil flow temperature II.
- these switch means consist of a bimetallic shutter 16 movable between an open position, as shown on the figure 6a , in which the heater 10 is not electrically connected to the source of electrical power and a closed position in which the heater 10 is electrically connected to the source of electrical power, thus resulting in a substantially identical operating diagram to that shown on the figure 6a .
- the bimetallic shutter 16 will advantageously be configured to switch to the open position when the temperature of the oil flow II reaches or exceeds the optimum operating temperature of the engine.
- these switch means 16 may consist of an electric switch capable of passing from an open state to a closed state under the control of a control unit, said control unit being capable of controlling the electrical switch according to a temperature value measured by a temperature sensor which will be in contact with the flow of oil II flowing along the anti-emulsion plate 8.
- the heating device 10 is arranged inside the suction tube 44 downstream of the housing 45
- the heating device 10 it will also be possible to arrange the heating device 10 inside the branch tube 41 upstream of the box 45 or in the box 45 itself.
- this heating device 10 consists, before its attachment to the internal periphery of the suction tube 44, of a flexible U-shaped flat support, having two lateral branches 12, 14 defined by the negative and positive conductive tracks and by a heating zone 102 between the side branches 12, 14, said heating zone 102 being formed by a plurality of resistive strips 15 each formed by printing an ink with a positive temperature coefficient, the negative and positive conductive tracks being electrically connected by means of said resistive strips 15. Due to its flexibility, the heating device 10 can roll up on itself so as to bring the side branches 12, 14 closer together, the heating zone 102 then having a substantially cylindrical shape, as represented on the figure 7 , which will facilitate its attachment to the inner periphery of the suction tube 44. This attachment may in particular take place by gluing, riveting or clipping.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
L'invention concerne un carter d'huile (1) comprenant une coque inférieure (2) destinée à contenir de l'huile de lubrification d'un moteur, dans laquelle un premier flux d'huile, dit flux d'huile aspiré (I), est aspiré par un tube d'aspiration (44) pour alimenter un circuit de lubrification et un deuxième flux d'huile, dit flux d'huile retournant (II), qui tombe dans le carter d'huile (1). Le carter d'huile (1) comprend une plaque anti-émulsion (8) disposée dans le carter d'huile (1) et des moyens d'orientation permettant d'orienter au moins une partie du flux d'huile retournant (II) vers une zone située à l'embouchure du tube d'aspiration (44) pendant une période transitoire durant laquelle l'huile présente une température inférieure à une température optimale de fonctionnement. Le carter d'huile (1) comprend en outre un dispositif de chauffage (10) apte à fournir une énergie thermique à ladite au moins une partie du flux d'huile retournant (II), ledit dispositif de chauffage (10) comprenant au moins un élément chauffant à coefficient de température positif.The invention relates to an oil sump (1) comprising a lower shell (2) intended to contain the lubricating oil of an engine, in which a first oil flow, called the sucked oil flow (I ), is sucked up by a suction tube (44) to supply a lubrication circuit and a second oil flow, called the returning oil flow (II), which falls into the oil sump (1). The oil pan (1) comprises an anti-emulsion plate (8) disposed in the oil pan (1) and orientation means for directing at least part of the returning oil flow (II) to an area located at the mouth of the suction tube (44) during a transient period during which the oil has a temperature below an optimum operating temperature. The oil sump (1) further comprises a heater (10) capable of supplying thermal energy to said at least part of the returning oil flow (II), said heater (10) comprising at least a positive temperature coefficient heating element.
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.Conventionally, an oil sump comprises a shell which is fixed under the engine block.
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 est refroidie dans le carter d'huile, lors de son mélange avec l'huile présente dans ledit carter.During its journey, the oil is heated by the engine parts and is cooled in the oil sump, when it mixes with the oil present in said 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 transitional phase of starting 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.
Selon une définition générale, l'invention concerne un carter d'huile comprenant une coque inférieure destinée à contenir de l'huile de lubrification d'un bloc moteur, dans laquelle un flux d'huile, dit flux d'huile aspiré, est aspiré par un tube d'aspiration pour alimenter un circuit de lubrification et un flux d'huile, dit flux d'huile retournant, qui tombe dans le carter d'huile. Le carter d'huile comprend une plaque anti-émulsion disposée dans le carter d'huile et des moyens d'orientation permettant d'orienter au moins une partie du flux d'huile retournant vers une zone située à l'embouchure du tube d'aspiration pendant une période transitoire durant laquelle l'huile présente une température inférieure à une température optimale de fonctionnement. Le carter d'huile comprend en outre un dispositif de chauffage apte à fournir une énergie thermique à ladite au moins une partie du flux d'huile retournant, ledit dispositif de chauffage comprenant au moins un élément chauffant à coefficient de température positif.According to a general definition, the invention relates to an oil sump comprising a lower shell intended to contain the lubricating oil of an engine block, in which an oil flow, called aspirated oil flow, is sucked via a suction tube to supply a lubrication circuit and an oil flow, called the returning oil flow, which falls into the oil sump. The oil pan includes an anti-emulsion plate disposed in the oil pan and orientation means making it possible to direct at least part of the flow of oil returning towards a zone located at the mouth of the suction tube during a transient period during which the oil has a temperature lower than an optimum temperature of functioning. The oil pan further includes a heater adapted to supply thermal energy to said at least a portion of the returning oil flow, said heater including at least one positive temperature coefficient heater.
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 du moteur 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 engine components that it has lubricated, 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 of the oil pump suction tube. In other words, during the starting transition phase, the flow of oil returning to the sump is directly sucked up by the oil pump without having dissipated the heat which it carries in the mass of oil in the sump. 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 fermée, 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 chauffe 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 closed loop, during the transient period, of the oil flow returning to the sucked oil flow makes it possible to accelerate the rise in temperature of the sucked 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 heating time of the oil 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.
L'invention permet par ailleurs d'accroître la température du flux d'huile retournant au moyen d'un dispositif de chauffage intégré dans le carter d'huile. Le dispositif de chauffage est configuré pour chauffer le flux d'huile retournant avant qu'il ne soit réinjecté dans le moteur. Le carter d'huile ainsi configuré permettra de diminuer encore plus 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.The invention also makes it possible to increase the temperature of the returning oil flow by means of a heating device integrated in the oil sump. The heater is configured to heat the returning oil stream before it is reinjected into the engine. The oil sump thus configured will further reduce the time of heats the oil in the engine's lubrication circuit and therefore reduces fuel consumption when starting the engine as well as carbon dioxide emissions.
Le fait d'utiliser un dispositif de chauffage comprenant un élément chauffant à coefficient de température positif permettra par ailleurs d'éviter que l'huile du circuit de lubrification dépasse la température de fonctionnement optimale du moteur. En effet, l'élément chauffant à coefficient de température positif possédant une température seuil au-delà de laquelle sa résistance augmente de manière exponentielle, il sera alors envisageable de choisir un élément chauffant à coefficient de température positif dont la température seuil est sensiblement égale à la température optimale de fonctionnement du moteur. Ainsi, lorsque la température de l'huile dépassera ladite température seuil, la résistance de l'élément chauffant augmentera de manière telle qu'elle réduira fortement, voire annulera totalement l'énergie thermique fournie par l'élément chauffant, stoppant de cette façon l'accroissement de la température de l'huile. Une autorégulation de la température du flux d'huile retournant s'obtiendra donc facilement au moyen de cet élément chauffant à coefficient de température positif, sans avoir besoin d'utiliser des détecteurs de température pour contrôler la température de l'huile retournant du moteur dans le carter d'huile.The fact of using a heating device comprising a heating element with a positive temperature coefficient will also make it possible to prevent the oil in the lubrication circuit from exceeding the optimum operating temperature of the engine. Indeed, the heating element with a positive temperature coefficient having a threshold temperature beyond which its resistance increases exponentially, it will then be possible to choose a heating element with a positive temperature coefficient whose threshold temperature is substantially equal to optimum engine operating temperature. Thus, when the temperature of the oil exceeds said threshold temperature, the resistance of the heating element will increase in such a way that it will greatly reduce, or even completely cancel the thermal energy supplied by the heating element, thereby stopping the increase in oil temperature. Self-regulation of the temperature of the oil flow returning will therefore be easily obtained by means of this heating element with a positive temperature coefficient, without the need to use temperature sensors to control the temperature of the oil returning from the engine in the oil pan.
Selon d'autres caractéristiques, le carter d'huile de l'invention pourra comporter une ou plusieurs des caractéristiques optionnelles suivantes considérées seules ou en combinaison :
- les moyens d'orientation comprennent un tube de dérivation débouchant à une première extrémité dans une ouverture de la plaque anti-émulsion et à une deuxième extrémité à l'embouchure du tube d'aspiration.
- ledit au moins un élément chauffant est positionné sur la plaque anti-émulsion.
- ledit au moins un élément chauffant est positionné dans le tube d'aspiration.
- ledit au moins un élément chauffant est positionné dans le tube de dérivation.
- le tube de dérivation et le tube d'aspiration débouchent dans un boitier présentant une ouverture permettant à l'huile stockée dans la coque inférieure d'être aspirée, et en ce que ledit au moins un élément chauffant est positionné sur le boîtier.
- ledit au moins un élément chauffant comprend une première piste conductrice, dite piste conductrice négative, et une deuxième piste conductrice, dite piste conductrice positive, ladite piste conductrice négative, respectivement positive, s'étendant depuis une borne de connexion électrique négative, respectivement positive, destinée à être connectée électriquement à une source de puissance électrique, jusqu'à une zone chauffante dudit au moins un élément chauffant, lesdites pistes conductrices négative et positive étant reliées électriquement au moyen d'une pluralité de bandes résistives formées chacune par impression d'une encre à coefficient de température positif.
- l'encre à coefficient de température positif comprend un pigment choisi parmi le carbonate de baryum, l'oxyde de titane, des nanotubes de carbone et le graphène.
- les pistes conductrices sont formées par impression d'une encre conductrice.
- l'encre conductrice comprend des particules métalliques, lesdites particules métalliques étant constituées de préférence de particules d'argent ou de cuivre.
- ledit au moins un élément chauffant comprend un support isolant électrique sur lequel sont imprimés les pistes conductrices et les bandes résistives.
- le support isolant électrique est fixé sur le carter d'huile par des moyens de fixation choisis parmi une colle ou un clip, ou par bouterollage avec des pions de centrage.
- les pistes conductrices et les bandes résistives sont imprimées directement sur une surface de la plaque anti-émulsion du carter d'huile qui est en contact avec ladite au moins une partie du flux d'huile retournant.
- ledit au moins un élément chauffant possède une température seuil au-delà de laquelle sa résistance augmente de manière exponentielle, ladite température seuil étant comprise entre 50°C et 150°C.
- ledit au moins un élément chauffant est alimenté en courant électrique par l'intermédiaire de moyens interrupteurs connectés électriquement à une source de puissance électrique, lesdits moyens interrupteurs étant aptes à empêcher, respectivement à permettre, l'alimentation en courant électrique dudit au moins un élément chauffant en fonction de la température de ladite au moins une partie du flux d'huile retournant.
- les moyens interrupteurs comprennent un obturateur à bilame mobile entre une position ouverte dans laquelle ledit au moins un élément chauffant n'est pas connecté électriquement à la source de puissance électrique et une position fermée dans laquelle ledit au moins un élément chauffant est connecté électriquement à la source de puissance électrique, l'obturateur à bilame étant adapté pour passer en position ouverte lorsque la température de ladite au moins une partie du flux d'huile retournant atteint ou dépasse la température optimale de fonctionnement.
- les moyens interrupteurs sont contrôlés par une unité de commande, ladite unité de commande étant apte à contrôler lesdits moyens interrupteurs en fonction d'une valeur de température mesurée par un capteur de température qui est en contact avec ladite au moins une partie du flux d'huile retournant.
- the orientation means comprise a branch tube opening at a first end into an opening of the anti-emulsion plate and at a second end at the mouth of the suction tube.
- said at least one heating element is positioned on the anti-emulsion plate.
- said at least one heating element is positioned in the suction tube.
- said at least one heating element is positioned in the branch tube.
- the bypass tube and the suction tube open into a box having an opening allowing the oil stored in the lower shell to be sucked up, and in that said at least one heating element is positioned on the box.
- said at least one heating element comprises a first conductive track, called negative conductive track, and a second conductive track, called positive conductive track, said negative, respectively positive, conductive track extending from a negative, respectively positive electrical connection terminal, intended to be electrically connected to a source of electrical power, up to a heating zone of said at least one heating element, said negative and positive conductive tracks being electrically connected by means of a plurality of resistive strips each formed by printing a positive temperature coefficient ink.
- the positive temperature coefficient ink comprises a pigment selected from barium carbonate, titanium oxide, carbon nanotubes and graphene.
- the conductive tracks are formed by printing a conductive ink.
- the conductive ink comprises metallic particles, said metallic particles preferably consisting of silver or copper particles.
- said at least one heating element comprises an electrically insulating support on which the conductive tracks and the resistive strips are printed.
- the electrically insulating support is fixed to the oil sump by fixing means chosen from glue or a clip, or by riveting with centering pins.
- the conductive tracks and the resistive strips are printed directly on a surface of the anti-emulsion plate of the oil sump which is in contact with said at least part of the returning oil flow.
- said at least one heating element has a threshold temperature beyond which its resistance increases exponentially, said threshold temperature being between 50°C and 150°C.
- said at least one heating element is supplied with electric current via switch means electrically connected to a source of electric power, said switch means being able to prevent, respectively to allow, the supply of electric current to said at least one element heating according to the temperature of said at least part of the returning oil flow.
- the switch means comprise a bimetallic shutter movable between an open position in which said at least one heating element is not electrically connected to the electric power source and a closed position in which said at least one heating element is electrically connected to the electric power source, the bimetallic shutter being adapted to switch to the open position when the temperature of said at least part of the returning oil flow reaches or exceeds the optimum operating temperature.
- the switch means are controlled by a control unit, said control unit being capable of controlling said switch means as a function of a temperature value measured by a temperature sensor which is in contact with said at least part of the flow of oil returning.
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 1a est une vue schématique d'un carter d'huile selon un premier mode de réalisation de l'invention, dans le cas où la température de l'huile n'a pas encore atteint une température seuil ; - La
figure 2a est une vue similaire à lafigure 1a , dans le cas où la température de l'huile a atteint une température seuil ; - La
figure 1b est une vue schématique d'un carter d'huile selon un deuxième mode de réalisation de l'invention, dans le cas où la température de l'huile n'a pas encore atteint une température seuil ; - La
figure 2b est une vue similaire à lafigure 1b , dans le cas où la température de l'huile a atteint une température seuil ; - Les
figures 3a et3b sont des vues en perspective, de dessus d'une plaque anti-émulsion pouvant équiper un carter d'huile selon le deuxième mode de réalisation, respectivement dans le cas où la température de l'huile n'a pas encore atteint une température seuil et dans le cas où la température de l'huile a atteint une température seuil ; - La
figure 4 est une vue en perspective de la plaque anti-émulsion représentée sur lesfigures 3a et3b , l'élément chauffant étant représenté avant son assemblage avec la plaque anti-émulsion ; - La
figure 5 est une vue partielle de dessus de l'élément chauffant représenté sur lafigure 4 ; - La
figure 6a est une représentation schématique du fonctionnement du carter d'huile de lafigure 1b ; - La
figure 6b est une représentation schématique du fonctionnement d'un carter d'huile selon un troisième mode de réalisation de l'invention ; - La
figure 7 est une vue en perspective éclatée d'un tube d'aspiration équipant un carter d'huile selon un quatrième mode de réalisation de l'invention ; - La
figure 8 est une vue à plat de l'élément chauffant recouvrant partiellement l'intérieur du tube d'aspiration représenté sur lafigure 7 .
- There
picture 1a is a schematic view of an oil pan according to a first embodiment of the invention, in the case where the temperature of the oil has not yet reached a threshold temperature; - There
figure 2a is a view similar to thepicture 1a , in the case where the temperature of the oil has reached a threshold temperature; - There
figure 1b is a schematic view of an oil pan according to a second embodiment of the invention, in the case where the temperature of the oil has not yet reached a threshold temperature; - There
figure 2b is a view similar to thefigure 1b , in the case where the temperature of the oil has reached a threshold temperature; - THE
figure 3a And3b are perspective views from above of an anti-emulsion plate that can be fitted to an oil sump according to the second embodiment, respectively in the case where the temperature of the oil has not yet reached a threshold temperature and in the event that the temperature of the oil has reached a threshold temperature; - There
figure 4 is a perspective view of the anti-emulsion plate shown in thefigure 3a And3b , the heating element being shown before its assembly with the anti-emulsion plate; - There
figure 5 is a partial top view of the heating element shown in thefigure 4 ; - There
figure 6a is a schematic representation of the operation of the oil sump of thefigure 1b ; - There
figure 6b is a schematic representation of the operation of an oil pan according to a third embodiment of the invention; - There
figure 7 is an exploded perspective view of a suction tube fitted to an oil pan according to a fourth embodiment of the invention; - There
figure 8 is a flat view of the heating element partially covering the inside of the suction tube shown in thefigure 7 .
En référence aux
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 fixée sur la coque inférieure 2 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
La coque inférieure 2 est adaptée pour contenir de l'huile. Elle est ouverte sur sa face supérieure. Elle pourra être réalisée en matériau polymère ou en aluminium.The
La plaque anti-émulsion 8 est destinée à recouvrir l'ouverture supérieure de la coque inférieure 2. La plaque anti-émulsion 8 pourra être réalisée en matériau polymère ou en aluminium. Une ouverture 87 est ménagée dans la plaque anti-émulsion 8. Les parois internes 84a, 84b de la plaque anti-émulsion 8 sont inclinées de part et d'autre de l'ouverture 87 de sorte que l'ouverture 87 définit un point bas pour la plaque anti-émulsion 8.The
Selon le mode de réalisation, représenté sur les
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
Le carter d'huile 1 comprend par ailleurs un dispositif de chauffage 10 destiné à chauffer l'huile circulant sur la plaque anti-émulsion 8. Comme expliqué précédemment, ce dispositif de chauffage 10 est formé par un ou plusieurs éléments chauffants à coefficient de température positif dont la température seuil est sensiblement égale à la température optimale de fonctionnement du moteur. Ce ou ces éléments chauffants 10 recouvrent au moins partiellement les parois internes 84a, 84b de la plaque anti-émulsion 8 de sorte que l'huile s'écoulant en direction de l'ouverture 87 le long des parois internes 84a, 84b est réchauffée par les éléments chauffants 10.The
Ainsi, 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 et s'écoule en direction de l'ouverture 87 le long des parois internes 84a, 84b. Ce flux d'huile retournant II est donc réchauffé par le dispositif de chauffage 10 avant d'atteindre l'ouverture 87.Thus, in conditions of use, when the engine is stopped, the majority of the oil is in the
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. Le flux d'huile retournant II 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.When the engine is started, the
Le flux d'huile aspiré I qui traverse le tube d'aspiration 44 contient principalement de l'huile provenant directement du moteur ayant déjà chauffé au contact des éléments du moteur, mais également au contact du dispositif de chauffage 10. 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 et le dispositif de chauffage 10 cesse de chauffer le flux d'huile retournant II. Dans ce cas, comme représenté sur la
Ainsi, dans ce mode de réalisation, les moyens d'orientation actifs permettant l'orientation du flux d'huile retournant II sont constitués par un obturateur à bilame 88 disposé au niveau de l'ouverture 87. Dans un autre mode de réalisation, ces moyens d'orientation actifs pourront être complétés ou remplacés par des obturateurs à bilames disposés au niveau des autres orifices de sortie (mentionnés précédemment) de la plaque anti-émulsion 8. Ces obturateurs à bilames seront mobiles entre une position fermée dans laquelle ils obtureront lesdits orifices de sortie et une position ouverte dans laquelle l'huile pourra s'écouler à travers lesdits orifices de sortie. Ces obturateurs seront configurés pour passer en position ouverte lorsque l'huile atteindra ou dépassera la température optimale de fonctionnement du moteur.Thus, in this embodiment, the active orientation means allowing the orientation of the returning oil flow II consist of a
En référence aux
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 fixée sur la coque inférieure 2 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
Ce deuxième mode de réalisation diffère de celui représenté sur les
Ainsi, 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 et s'écoule en direction de l'ouverture 87 le long des parois internes 84a, 84b. Ce flux d'huile retournant II est donc réchauffé par le dispositif de chauffage 10 avant d'atteindre l'ouverture 87.Thus, in conditions of use, when the engine is stopped, the majority of the oil is in the
Au démarrage du moteur, l'obturateur à bilame 88 est en position fermée 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, puis le long du tube de dérivation 41. Le flux d'huile retournant II circulant dans le tube de dérivation 41 s'écoule ensuite à l'embouchure du tube d'aspiration 44 où il est aspiré et devient le flux d'huile aspiré I.When the engine is started, the
Le flux d'huile aspiré I qui traverse le tube d'aspiration 44 contient principalement de l'huile provenant directement du moteur ayant déjà chauffé au contact des éléments du moteur, mais également au contact du dispositif de chauffage 10. 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 ouverte et le dispositif de chauffage 10 cesse de chauffer le flux d'huile retournant II. Dans ce cas, comme représenté sur la
En référence aux
Cette plaque anti-émulsion 8 présente notamment une portion de collecte 81. La portion de collecte 81 présente deux rebords 82. 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 comprend une paroi de fond 84 décalée en direction du fond de la coque inférieure 2 par rapport aux rebords 82. Une ouverture de passage d'huile 87 est ménagée dans la paroi de fond 84. Cette ouverture 87 communique avec un tube de dérivation 41 disposé sous la plaque anti-émulsion 8. Le tube de dérivation 41 est muni de plusieurs ouvertures 89 (comme représenté sur la
Un dispositif de chauffage 10 constitué d'un élément chauffant sensiblement plat est fixé sur la paroi de fond 84 de manière à la recouvrir presque intégralement, en laissant toutefois apparente l'ouverture 87. Comme illustré sur la
En référence à la
Ainsi configuré, l'élément chauffant 10 se présente sous la forme d'un circuit imprimé flexible dont les pistes conductrices négative et positive 12, 14 s'étendent depuis une zone d'extrémité 101 jusqu'à une zone chauffante 102 formée principalement par les pistes secondaires 121-126, 141-146 reliées par les bandes conductrices 15. Chaque piste conductrice 12, 14 sera alimentée en courant électrique par l'intermédiaire d'une borne de connexion électrique (non représentée), respectivement négative et positive, reliée électriquement aux pistes conductrices 12, 14 au niveau de la zone d'extrémité 101 et destinée à être connectée électriquement à une source de puissance électrique.Thus configured, the
En référence à la
En référence à la
Dans une autre variante de réalisation (non représentée), ces moyens interrupteurs 16 pourront consister en un interrupteur électrique pouvant passer d'un état ouvert à un état fermé sous le contrôle d'une unité de commande, ladite unité de commande étant apte à contrôler l'interrupteur électrique en fonction d'une valeur de température mesurée par un capteur de température qui sera en contact avec le flux d'huile II s'écoulant le long de la plaque anti-émulsion 8.In another variant embodiment (not shown), these switch means 16 may consist of an electric switch capable of passing from an open state to a closed state under the control of a control unit, said control unit being capable of controlling the electrical switch according to a temperature value measured by a temperature sensor which will be in contact with the flow of oil II flowing along the
Selon d'autres variantes de réalisation de l'invention, il sera également possible de remplacer l'obturateur à bilame 16 par un autre dispositif à déclenchement thermostatique du type capsule à cire ou alliages à mémoire de forme.According to other variant embodiments of the invention, it will also be possible to replace the
En référence à la
Tel que représenté sur la
Bien entendu, l'invention n'est nullement limitée aux modes de réalisation décrits ci-dessus et illustrés par les différentes figures, ces modes de réalisation n'ayant été donnés qu'à titre d'exemples. Des modifications restent possibles, notamment du point de vue de la substitution d'équivalents techniques sans pour autant sortir du cadre de l'invention.Of course, the invention is in no way limited to the embodiments described above and illustrated by the various figures, these embodiments having been given only by way of examples. Modifications remain possible, in particular from the point of view of the substitution of technical equivalents without departing from the scope of the invention.
Claims (17)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2108104A FR3125556B1 (en) | 2021-07-26 | 2021-07-26 | Oil pan including an oil heater |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4124728A1 true EP4124728A1 (en) | 2023-02-01 |
Family
ID=77411959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22186539.7A Withdrawn EP4124728A1 (en) | 2021-07-26 | 2022-07-22 | Oil sump comprising a device for heating oil |
Country Status (2)
Country | Link |
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EP (1) | EP4124728A1 (en) |
FR (1) | FR3125556B1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090277416A1 (en) * | 2008-05-09 | 2009-11-12 | Toyota Boshoku Kabushiki Kaisha | Diluting fuel-in-oil separating apparatus of internal combustion engine |
US20120006622A1 (en) * | 2009-03-19 | 2012-01-12 | Ino8 Pty Ltd. | Method and apparatus for oiling rotating or oscillating components |
DE102012020282A1 (en) * | 2012-10-17 | 2014-04-17 | Daimler Ag | Lubricant container for aggregate of motor vehicle, has isolation element which is provided for thermally insulating primary receiving chamber, and heater is provided for heating lubricant received in primary receiving chamber |
US20140353230A1 (en) * | 2013-06-03 | 2014-12-04 | Mann+Hummel Gmbh | Filter with heating medium and filter element of a filter |
DE102013013309A1 (en) * | 2013-08-12 | 2015-02-12 | Mann + Hummel Gmbh | Container for fluid with a heater |
DE102016216359A1 (en) * | 2016-08-30 | 2018-03-01 | Bayerische Motoren Werke Aktiengesellschaft | Drive device for a motor vehicle |
FR3057610A1 (en) * | 2016-10-18 | 2018-04-20 | Mecaplast France | OIL PAN |
-
2021
- 2021-07-26 FR FR2108104A patent/FR3125556B1/en active Active
-
2022
- 2022-07-22 EP EP22186539.7A patent/EP4124728A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090277416A1 (en) * | 2008-05-09 | 2009-11-12 | Toyota Boshoku Kabushiki Kaisha | Diluting fuel-in-oil separating apparatus of internal combustion engine |
US20120006622A1 (en) * | 2009-03-19 | 2012-01-12 | Ino8 Pty Ltd. | Method and apparatus for oiling rotating or oscillating components |
DE102012020282A1 (en) * | 2012-10-17 | 2014-04-17 | Daimler Ag | Lubricant container for aggregate of motor vehicle, has isolation element which is provided for thermally insulating primary receiving chamber, and heater is provided for heating lubricant received in primary receiving chamber |
US20140353230A1 (en) * | 2013-06-03 | 2014-12-04 | Mann+Hummel Gmbh | Filter with heating medium and filter element of a filter |
DE102013013309A1 (en) * | 2013-08-12 | 2015-02-12 | Mann + Hummel Gmbh | Container for fluid with a heater |
DE102016216359A1 (en) * | 2016-08-30 | 2018-03-01 | Bayerische Motoren Werke Aktiengesellschaft | Drive device for a motor vehicle |
FR3057610A1 (en) * | 2016-10-18 | 2018-04-20 | Mecaplast France | OIL PAN |
Also Published As
Publication number | Publication date |
---|---|
FR3125556A1 (en) | 2023-01-27 |
FR3125556B1 (en) | 2024-03-29 |
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