EP1677064A2 - Ölwanne für Brennkraftmaschine - Google Patents

Ölwanne für Brennkraftmaschine Download PDF

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Publication number
EP1677064A2
EP1677064A2 EP05292587A EP05292587A EP1677064A2 EP 1677064 A2 EP1677064 A2 EP 1677064A2 EP 05292587 A EP05292587 A EP 05292587A EP 05292587 A EP05292587 A EP 05292587A EP 1677064 A2 EP1677064 A2 EP 1677064A2
Authority
EP
European Patent Office
Prior art keywords
oil
heat exchanger
housing according
engine
housing
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.)
Granted
Application number
EP05292587A
Other languages
English (en)
French (fr)
Other versions
EP1677064A3 (de
EP1677064B1 (de
Inventor
Bernard Peron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sogefi Filtration SA
Original Assignee
Filtrauto SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from FR0413033A external-priority patent/FR2878892B1/fr
Priority claimed from FR0413037A external-priority patent/FR2878893B1/fr
Application filed by Filtrauto SA filed Critical Filtrauto SA
Publication of EP1677064A2 publication Critical patent/EP1677064A2/de
Publication of EP1677064A3 publication Critical patent/EP1677064A3/de
Application granted granted Critical
Publication of EP1677064B1 publication Critical patent/EP1677064B1/de
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/003—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by using permeable mass, perforated or porous materials
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
    • F28D3/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits with tubular conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0089—Oil coolers

Definitions

  • the present invention relates to oil sump for internal combustion engines and internal combustion engines comprising such oil sump.
  • the invention relates to an oil sump for an internal combustion engine comprising a heat exchanger for interacting with the oil.
  • oil pans are described in particular in French patent applications FR 738 122 and FR 2 721 975 as well as in US Pat. No. 5,408,965.
  • Known heat exchangers intended to be arranged inside the oil sump are generally in the form of a plate heat exchanger between which or in which is intended to circulate a cooling fluid. These plate heat exchangers only provide the function of cooling the oil from the rotating parts of the engine.
  • the plate heat exchangers have a relatively large volume of space, which implies that other devices performing other functions may be difficult to arrange inside the oil sump when the latter is mounted on the crankcase of the internal combustion engine.
  • the present invention is intended to overcome the disadvantages mentioned above.
  • the subject of the invention is an oil sump for an internal combustion engine
  • the heat exchanger is made from an oil-permeable material in which at least one cooling fluid pipe is embedded.
  • the exchange thermal in accordance with the invention by its oil permeable structure allows, in addition to the cooling of the liquid, the pre-filtration of the particles contained in the oil.
  • the oil-permeable material is a spongy or porous material. Consequently, by the use of a sponge-like or porous type structure of the permeable material, the heat exchanger makes it possible to reduce relatively relatively the propagation of the engine noise towards the oil sump and therefore towards the engine. 'outside.
  • the invention also relates to an internal combustion engine equipped with an oil sump as defined above.
  • FIG. 1 represents a heat exchange device 1 disposed inside an oil sump 2 which is directly fixed on a cylinder block 3 of an internal combustion engine of a vehicle. Inside the crankcase 3 are arranged the crankshaft, the journals 4 of the crankshaft, the crank pins 5 as well as the counterweight 6 of the crankshaft. The pistons and the upper part of the engine are not shown to preserve the clarity of the drawings.
  • the heat exchange device 1 is in the form of a single heat exchanger 7 disposed in the upper half of the oil sump 2.
  • This heat exchanger 7 is made from an oil-permeable material 9 having a spongy or porous type structure in which at least one cooling fluid pipe 10, such as brine, is embedded.
  • the permeable material 9 may for example be in the form of a porous or spongy, continuous, one-piece and three-dimensional network of metallic material, defining a multitude of cell spaces that communicate with one another, such as
  • This oil-permeable material 9 may, for example, be in the form of a porous block of metallized foam type.
  • the permeable material 9 formed by a metal foam for example copper, nickel, aluminum or their alloys, can be obtained from a polyurethane base structure.
  • the polyurethane base structure is made conductive, for example, by spraying a thin layer of conductive metal on the polyurethane base structure.
  • a galvanic deposit, for example copper, is then made on the structure, the deposit is made electrolytically.
  • the organic matrix is removed, for example, by heating or etching, leaving only the metal foam which then has a structure corresponding to the negative of the polyurethane preform.
  • a metal powder may first be combined with a foaming agent, and then the mixture is strongly compacted and heated to a temperature above the melting temperature of the metal, such as so that the foaming agent causes an expansion of the material which then creates the metal foam 9.
  • the permeable structure can also be obtained by injecting the molten metal into a mold that will be destroyed.
  • This process initially uses a polymer foam of the type for example open porosity polyurethane foam. This first foam is then embedded in a suspension resistant to the melting temperature of the metal. This suspension is for example a ceramic suspension. After baking the suspension, the polyurethane foam is destroyed by heat treatment, and the molten metal is injected into the open ceramic structure thus reproducing the original polyurethane foam. The ceramic that served as a mold is then destroyed for example by vibration or using a jet of water under pressure.
  • the permeable metal structure can also be achieved by the sintering process of powders or metal fibers.
  • a filler material is added and mixed homogeneously with the metal particles. This material is destroyed during the sintering process.
  • the tubular network, formed by said at least one cooling line 10 is previously placed in the mold / imprint used to form the permeable structure. During its production, the permeable structure is thus formed around the tubular network, which makes it possible to obtain the heat exchanger 7.
  • the tubular network can be further connected to the permeable structure by brazing with filler metal, by autogenous welding or other welds.
  • the permeable material of the spongy or porous type forming part of the exchanger thermal can be achieved as described in the French patent application FR 2,742,856.
  • the oil from the rotating parts of the motor flows from the upper face 8 of the heat exchanger 7 to its lower surface 11 while coming into contact with the coolant lines 10 to be cooled before to be collected in the bottom of the sump 2.
  • the oil also undergoes demulsification when the oil passes through gravity permeable material 9 forming part of the crankcase.
  • heat exchanger 7 insofar as the gas bubbles contained in the oil volume, passing through the porosities of the material 9, are broken into small bubbles which can more easily go up to the surface of the volume of oil H stored in the bottom of the oil sump 2.
  • demulsification means the removal or evacuation of the gases contained in the oil.
  • the metal permeable oil material 9 in its stochastic structure also forms a barrier against the propagation of engine noise to the oil sump 2 and to the outside.
  • the upper face 8 of the heat exchanger formed by the upper face of the permeable material 9 forms an upper oil-receiving face which is shaped to produce anti-emulsification means. 'oil.
  • anti-emulsion means means means adapted to prevent or limit the introduction of gas into the oil.
  • This upper face 8 of the permeable material 9 may in particular have several recesses of suitable shape to avoid contact with the moving parts of the engine, namely mainly the counterweight 6 of the crankshaft and the connecting rod heads (not shown).
  • the upper surface 8 may have shapes such as those described in the French patent applications FR 2 650 033 and FR 2 760 042.
  • the main function of the upper surface 8 of the heat exchanger is thus to reduce the contact between the rotating parts of the engine and the oil H collected in the bottom of the oil sump 2, in order to avoid the losses of power by friction and to limit the aeration of the oil by the gases contained in the crankcase and which contribute to accelerate the aging of the oil.
  • the upper surface 8 shaped to produce oil anti-emulsion means also has the function of reducing the effect of the aerodynamic effects produced by the moving parts on the surface of the oil H stored in the oil sump. oil so as to also avoid the aeration of the oil by the gases contained in the crankcase.
  • the arrangement of the heat exchanger 7 in the upper part of the oil sump 2 also makes it possible to limit the movements of the oil H collected. in the bottom of the casing 2 during longitudinal and transverse accelerations of the vehicle so as to avoid aeration of the oil by the gases contained in the housing and also to prevent the oil comes into contact with the movable members.
  • the upper surface 8 of the heat exchanger 7 has a substantially concave shape in cross-section so as to have inclined surfaces on which a part of the oil coming from the rotating parts motor can slip and spread.
  • the thickness of the oil film thus created is reduced, thus the gas bubbles contained in the oil film can escape more easily resulting in an improved demulsification of the oil.
  • the lower face 11 of the heat exchanger 7 has a concave shape parallel to the upper face 8. Nevertheless, the lower face 11 of the heat exchanger could have a different shape, for example flat, without departing from the scope of the invention .
  • the heat exchange device 1 also comprises two oil receiving chutes 12 arranged on either side and along the entire length of the heat exchanger 7. These oil receiving chutes 12 are arranged opposite passages 13 allowing the delivery of oil from the top of the engine to the heat exchanger 7.
  • the oil from the top of the engine (not shown) is particularly necessary for the lubrication of the distribution such as hydrodynamic bearings d camshafts, feed timing adjuster and hydraulic play adjusters.
  • the oil receiving chutes 12 which are in the form of grooves may for example be directly made from the metal foam 9.
  • the bottom 12a of each trough 12 as well as its outer edge 12b directed towards the side walls of the oil sump are sealed while the inner edge 12c is not sealed so as to allow a flow of oil from the top of the engine inside the 9.
  • This oil then passes through the metal foam which is itself cooled by the pipes 10 through which circulates a cooling fluid.
  • the oil flows by gravity to the lower face 11 of the heat exchanger 7 to finally accumulate at the bottom of the oil sump 2.
  • each chute has a height less than that of the corresponding inner edge 12c so that in case of overflow of oil in each chute 12 especially due to the speed of flow of the oil slowed due to its increased viscosity, oil can flow out of the heat exchanger.
  • the heat exchange device may also comprise at least one anti-clogging channel 14 which extends between the upper face 8 and the lower face 11 of the heat exchanger 7.
  • the heat exchange device 1 comprises two anti-clogging channels 14 arranged at a sufficient distance from each other to allow the formation of a small volume of storage space.
  • oil H1 above the upper surface 8 of the heat exchanger in case of too much oil as shown in Figure 2.
  • the upper surface 8 of the heat exchanger 7 must then be arranged so that the upper level of the stored oil volume H1 or retained on this upper surface 8 does not fit in the evolution zone 15 (shown in dotted lines) of the crankshaft assembly, connecting rod heads and counterweights of the crankshaft.
  • Figures 3 to 5 show three alternative embodiments of the heat exchanger attachment means 7 on the oil sump 2 and / or on the cylinder block 3 of the internal combustion engine.
  • the fastening means can be in the form of fins horizontal fins 16 which extend from the outer edge 12b of each chute 12.
  • These horizontal fins 16 are intended to be housed in suitably shaped housings formed on the end edges of the oil sump 2 and / or the inner cylinder 3 of the internal combustion engine.
  • the housings made on the oil sump 2 and / or the cylinder block 3 of the internal combustion engine have complementary shapes to those of the horizontal fins 16 of the heat exchanger 7 so as not to crush the said foams 16 when attaching the oil sump 2 to the cylinder block 3.
  • the presence of the horizontal fins 16 requires the realization of through holes 27 at the outer edges 12b of each chute 12 so as to allow an evacuation of the oil from said chutes 12 in case of too much oil.
  • the heat exchanger 7 may be incorporated in a metal frame or plastic which ensures the maintenance and rigidity of the metal foam. This frame makes it easy to obtain fixing points for fixing the heat exchanger on the oil sump 2 or the cylinder block 3.
  • the fastening means may also be in the form of fixing feet 17 extending between a lower end fastened to the bottom of the oil sump 2 and an upper end presenting in the form for example of a threaded rod which passes through the bottom 12a of each chute 12. This threaded rod then cooperates with for example a bolt 17a to allow attachment of the bottom 12a of each chute relative to the oil sump 2.
  • a sole 28 may be directly interposed and fixed between the lower part of the cylinder block 3 and the upper part of the oil sump 2.
  • This sole 28 of the cylinder block 3 may in particular comprise fixing bosses 29 formed by casting with the sole 28.
  • the heat exchanger attachment means 7 are then formed by a rod 30 having two threaded ends which respectively pass through the corresponding boss 29 and the bottom 12a of the chute 12 corresponding. These two threaded ends of the rod 30 are fixed for example by means of two bolts to allow the attachment of the heat exchanger 7 on the sole 28 of the cylinder block 3.
  • FIGS. 6 and 7 show examples of routing of the cooling fluid inside the pipes 10 embedded in the metal foam 9.
  • the plurality of conduits 10 form a tubular network 18 in which the coolant or heat transfer fluid circulates.
  • This tubular network 18 may be connected for example to a source 17 of cooling fluid disposed outside the oil sump 2.
  • the tubular network 18 passes through the wall of the oil sump 2 at passages 19 sealed, these passages 19 preferably being made above the oil level which will be stored in the bottom of the oil sump 2.
  • the tubular network 18 for circulating cooling fluid can be connected to channels 20 formed in one of the walls of the oil sump 2. These channels 20 are then connected to the circuit cooling water 21 of the engine, this cooling circuit 21 being used in particular for cooling the engine cylinders.
  • the Channels 20 formed in the oil sump 2 may for example be directly made during manufacture in the casing of the oil sump or later by machining.
  • a seal 22 may be used at the interface between the oil sump 2 and the cylinder block 3.
  • FIG. 8 represents another embodiment of the heat exchanger according to the invention.
  • the thickness of the heat exchanger 7 has been increased so as to also increase the number of coolant lines 10 directly embedded in the metal foam 9.
  • This increase in the number of fluid lines 10 cooling makes it possible to increase significantly the heat exchange surface and consequently the heat power that can be exchanged, this then having the effect of improving the cooling of the oil.
  • This embodiment variant as shown in FIG. 8 also makes it possible to improve the demulsification of the oil insofar as the increase in the thickness of the metal foam 9 makes it possible to break a larger number of bubbles contained in the oil descending from the cylinder block 3.
  • the heat exchange device 1 may also comprise a second heat exchanger 23 directly disposed between the heat exchanger 7 and the bottom of the oil sump 2.
  • this second heat exchanger 23 will also be made from a spongy or porous type oil-permeable material while being disposed above the oil to be stored in the bottom of the oil sump so as to allow the oil to pass through the second heat exchanger 23 by gravity before being stored in the bottom of the sump 2 and evacuated by means of an oil pump.
  • This heat exchanger 23 unlike the exchanger 7 has no anti-emulsion function.
  • This heat exchanger 23 has lateral flanges 24 which protrude upwardly so as to delimit a bowl 25 so that the oil flowing from the heat exchanger 7 arrives in said bowl 25 so as to pass through the whole of the bowl.
  • metal foam of the heat exchanger 23 thus avoiding that the fluid flows along the sidewalls 26 of the exchanger 23.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP05292587A 2004-12-07 2005-12-06 Ölwanne für Brennkraftmaschine Ceased EP1677064B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0413033A FR2878892B1 (fr) 2004-12-07 2004-12-07 Carter d'huile pour moteur a combustion interne et moteur a combustion interne comprenant un tel carter d'huile
FR0413037A FR2878893B1 (fr) 2004-12-07 2004-12-07 Dispositif d'echange thermique destine a etre dispose dans un carter d'huile, carter d'huile et moteur a combustion interne comprenant un tel dispositif d'echange thermique

Publications (3)

Publication Number Publication Date
EP1677064A2 true EP1677064A2 (de) 2006-07-05
EP1677064A3 EP1677064A3 (de) 2009-10-14
EP1677064B1 EP1677064B1 (de) 2011-05-11

Family

ID=36072009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05292587A Ceased EP1677064B1 (de) 2004-12-07 2005-12-06 Ölwanne für Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP1677064B1 (de)
AT (1) ATE509251T1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007095905A1 (de) * 2006-02-25 2007-08-30 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Wärmetauscher und herstellungsverfahren

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR738122A (fr) 1932-06-03 1932-12-21 Refroidisseur d'huile pour machines à combustion
FR2650033A1 (fr) 1989-07-20 1991-01-25 Daimler Benz Ag Tablier de paliers pour le montage d'un vilebrequin de moteur a combustion interne
US5408965A (en) 1993-10-04 1995-04-25 Ford Motor Company Internal combustion engine oil pan with oil cooler
FR2721975A1 (fr) 1994-06-30 1996-01-05 Peugeot Echangeur de chaleur pour moteur a combustion, et carter de moteur equipe de cet echangeur
FR2742856A1 (fr) 1995-12-21 1997-06-27 Renault Echangeur de chaleur pour vehicule automobile comportant une structure maillee tridimensionnelle permeable
FR2760042A1 (fr) 1997-02-21 1998-08-28 Renault Plaque anti-emulsion d'huile, carter d'huile et moteur a combustion interne equipe d'un carter d'huile

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306353A (en) * 1964-12-23 1967-02-28 Olin Mathieson Heat exchanger with sintered metal matrix around tubes
DE3444838C2 (de) * 1984-12-08 1986-10-30 Bayerische Motoren Werke AG, 8000 München Gehäuse für Hubkolben-Brennkraftmaschine, insbesondere Motorblock
FR2776017B1 (fr) * 1998-03-13 2000-05-05 Renault Moteur a combustion interne comportant un dispositif anti-barbotage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR738122A (fr) 1932-06-03 1932-12-21 Refroidisseur d'huile pour machines à combustion
FR2650033A1 (fr) 1989-07-20 1991-01-25 Daimler Benz Ag Tablier de paliers pour le montage d'un vilebrequin de moteur a combustion interne
US5408965A (en) 1993-10-04 1995-04-25 Ford Motor Company Internal combustion engine oil pan with oil cooler
FR2721975A1 (fr) 1994-06-30 1996-01-05 Peugeot Echangeur de chaleur pour moteur a combustion, et carter de moteur equipe de cet echangeur
FR2742856A1 (fr) 1995-12-21 1997-06-27 Renault Echangeur de chaleur pour vehicule automobile comportant une structure maillee tridimensionnelle permeable
FR2760042A1 (fr) 1997-02-21 1998-08-28 Renault Plaque anti-emulsion d'huile, carter d'huile et moteur a combustion interne equipe d'un carter d'huile

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007095905A1 (de) * 2006-02-25 2007-08-30 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Wärmetauscher und herstellungsverfahren
JP2009527720A (ja) * 2006-02-25 2009-07-30 ルーク ラメレン ウント クツプルングスバウ ベタイリグングス コマンディートゲゼルシャフト 熱交換器及びその製造方法
US8033321B2 (en) 2006-02-25 2011-10-11 Schaeffler Technologies Gmbh & Co. Kg Heat exchanger and method of manufacturing

Also Published As

Publication number Publication date
EP1677064A3 (de) 2009-10-14
EP1677064B1 (de) 2011-05-11
ATE509251T1 (de) 2011-05-15

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