EP3255270A1 - Element zum umleiten einer zirkulierenden flüssigkeit in einer flüssigkeitsleitung eines krümmers - Google Patents

Element zum umleiten einer zirkulierenden flüssigkeit in einer flüssigkeitsleitung eines krümmers Download PDF

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Publication number
EP3255270A1
EP3255270A1 EP17173287.8A EP17173287A EP3255270A1 EP 3255270 A1 EP3255270 A1 EP 3255270A1 EP 17173287 A EP17173287 A EP 17173287A EP 3255270 A1 EP3255270 A1 EP 3255270A1
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EP
European Patent Office
Prior art keywords
cylinder head
deflection element
fluid
duct
mold
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Withdrawn
Application number
EP17173287.8A
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English (en)
French (fr)
Inventor
Mathieu PONT
Jean-Marie SALONDY
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.)
Renault SAS
Original Assignee
Renault SAS
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
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP3255270A1 publication Critical patent/EP3255270A1/de
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 

Definitions

  • the present invention relates to a deflecting element of a fluid flowing in a fluid duct of a cylinder head.
  • the invention also relates to a cylinder head comprising at least one such deflection element and a motor of a vehicle provided with such a cylinder head.
  • the invention also relates to a method of manufacturing this cylinder head and a vehicle comprising such a motor provided with this cylinder head.
  • the zone comprising the tablature of the cylinder head that is to say the metal layer which separates its face adjacent to the combustion chamber, can reach or exceed high temperatures, for example the order of 230 ° C, which requires a powerful cooling system.
  • the generally used cooling systems comprise at least one fluid conduit also called “water core”, consisting of channels for circulating a cooling fluid in the cylinder head to cool the areas of the cylinder head which are highly thermally stressed and around the elements. interacting with the cylinder head such as the valves and the fuel injector.
  • such a protuberance being thus defined in the wall of the fluid duct weakens the latter and therefore by extension the cylinder head.
  • a protuberance is conventionally obtained by casting during the manufacture of the cylinder head which makes it integral with the wall of the duct and the area comprising the tablature.
  • the latter are particularly stressed by high pressures generating considerable bending forces to which are added thermal stresses due to the high temperatures prevailing in this combustion chamber.
  • this protuberance therefore serves as a hinge and then works in fatigue at the rate of pressure and temperature variations in the combustion chamber and can then be the cause of cracking of the area comprising the tablature of the cylinder head, intake and exhaust ducts as well as passages for the cooling fluid which are made in the cylinder head.
  • the present invention aims to overcome these disadvantages related to the state of the art.
  • the invention relates to a deflection element for a flow of fluid flowing in a fluid duct of a cylinder head comprising a component for connecting said deflection element to a wall of the duct and at least one guiding component. said components being connected to each other.
  • the invention also relates to a cylinder head for an internal combustion engine, provided with at least one fluid conduit in which a fluid flow circulates, comprising at least one such deflection element.
  • the invention relates to an engine comprising such a cylinder head.
  • the method comprises a step of cooling the mold, during which the molten metal material is solidified in the mold.
  • the invention further relates to a vehicle including a motor vehicle, comprising such a motor.
  • the figure 1 is a schematic view of a motor 1 of a vehicle, including a motor vehicle, comprising a cylinder head 2 and a cylinder block (not shown).
  • the cylinder head 2 comprises a portion of a combustion chamber 5 of the engine above which is arranged a tablature 6 of the cylinder head 2 which cap the cylinder block.
  • This engine 1 can be an internal combustion engine 1 made of cast iron or aluminum alloy, in particular it can be a diesel engine 1 high power that can be turbocharged and direct injection.
  • the cylinder head 2 of this engine 1 is a complex piece which is made of a metallic material such as cast iron or an aluminum alloy.
  • This cylinder head 2 comprises intake ducts, exhaust ducts and at least one fluid duct 4a, 4b, otherwise called a core or fluid chamber, and in which circulates the coolant 16 or cooling fluid 16.
  • the duct fluid 4a, 4b is a hollow volume or a recess consisting of circulation channels of the cylinder head 2 in which is intended to circulate the cooling fluid 16, here water.
  • the yoke 2 comprises two fluid conduits 4a, 4b, a lower fluid conduit 4a and an upper fluid conduit 4b for cooling lower and upper portions of the cylinder head 2.
  • the lower fluid conduits and upper 4a, 4b are defined in the cylinder head 2 so as to surround as closely as possible the combustion chamber 5 and exhaust ducts.
  • These lower and upper fluid conduits 4a, 4b are separated by a wall 7 called "inter-duct wall” or "inter-core wall”.
  • the yoke 2 comprises a sole 8 defined in a wall separating the lower fluid duct 4a and the combustion chamber 5.
  • This yoke 2 also comprises at least one deflection element 3 of the fluid stream 16 flowing in the fluid conduits 4a, 4b.
  • This element of deviation 3 is defined to be arranged in one of these ducts 4a, 4b, the lower duct 4a or the upper duct 4b.
  • the expression "fluid conduit” is used to designate one or other of the upper and lower fluid conduits 4a, 4b.
  • this deflection element 3 comprises a connecting component 9 and at least one guiding component 10a, 10b of the fluid flow 16 connected to each other.
  • the deflector element 3 otherwise known as a deflector, is an insert-type part, in particular a single piece, which is attached to the cylinder head 2.
  • the fastening and guiding components 9, 10a, 10b of this deflection element 3 may, for example to be slats.
  • This deflection element 3 is made of a metal material such as an aluminum alloy, cast iron or steel. This material has properties of rigidity and / or resistance to bending, greater than those of the material constituting the yoke 2. In addition, the material constituting the deflection element 3 also has superior strength and / or thermal properties. to those of the material in which the cylinder head 2 is made. In addition, this material has a melting temperature which is greater than that of the material in which the cylinder head 2 is manufactured.
  • the deflection element 3 can be obtained by cutting processes, stamping a block or a plate of the metallic material or from casting or casting processes.
  • the deflection element 3 can be manufactured from an assembly of components 10a, 10b, 9 of this element 3 which are obtained beforehand from these cutting, stamping, molding and / or or foundry mentioned above. This assembly can subsequently provide for the realization of a mechanical connection between these components 9, 10a, 10b, in particular by welding.
  • the connecting component 9 provides a mechanical connection of said element 3 with the wall 7, 8 of the conduit in which the deflection element 3 is arranged, namely for example the wall relative to the sole 8 or still further the inter-duct wall 7.
  • This connecting component 9 may comprise at least one anchoring element 11 fixed in the wall of the duct.
  • the connecting component 9 has a section having a rectangular shape.
  • the anchoring element 11 is an opening which is formed in the body of this connecting component 9 by connecting outer and inner faces 12a, 12b of this component 9 between them.
  • This anchoring element 11 is intended to be completely or partially filled with the metal material of the cylinder head 2 according to a method of manufacturing the cylinder head 2 described below.
  • this connecting component 9 may be devoid of the anchoring element 11 and then comprise a holding element.
  • this holding element may be a rod which emanates from the internal face 12b of the connecting component 9 and which is substantially perpendicular to this face 12b.
  • This rod is then defined to participate in maintaining the deflection element 3 in a given fixed position in the fluid conduit 4a, 4b. More precisely, when the deflection element 3 is arranged in the fluid conduit 4a, 4b, it is held in position in this conduit 4a, 4b because a free end of this rod and all or part of the outer face 12a of the connecting component 9 bear on the wall 7, 8 of the duct at the level of points of support which are opposite and / or aligned.
  • the connecting component 9 can be connected at the level of the wall 7, 8 of the fluid conduit 4a, 4b, by support points or by at least one element of fastener 11 attached to this wall 7, 8.
  • the deflection element 3 comprises at least one guiding component 10a, 10b of the circulating fluid. in the fluid duct 4a, 4b in which this deflection element 3 is arranged.
  • This guiding component 10a, 10b is defined to be totally or partially comprised in the chamber of the fluid duct 4a, 4b.
  • the deflection element 3 comprises two guiding components 10a, 10b which are situated respectively at the front and rear ends 12c, 12d of the connecting component 9. These guiding components 10a, 10b may be arranged symmetrically in this deflection element 3 with respect to an axis of symmetry A of the connecting component 9. It will be noted that the deflection element 3 may of course comprise more guiding components 10a, 10b which may for example be located on the lateral edges of the connecting component 9. Each guide component 10a, 10b can form an angle ⁇ preferably acute, with the connecting component 9.
  • this angle ⁇ is defined according to the increase / reduction in particular the flow rate of the fluid to be configured in a portion of the duct 4a, 4b where the deflection element 3 can be arranged for optimum cooling of the cylinder head 2. It should be noted that inasmuch as the deflection element 3 comprises several guiding components 10a, 10b, these do not necessarily form angles ⁇ of the same value with the connecting component 9.
  • the connecting component 9 and / or the guiding component 10a, 10b may have a predefined thickness which contributes to the rigidity and the resistance of the deflection element 3, especially with regard to the bending forces and the mechanical stresses. and / or thermal that undergoes the cylinder head 2.
  • the invention also relates to the method of manufacturing the cylinder head 2 provided with at least one deflection element 3.
  • the cylinder head 2 is manufactured in the foundry, for example according to processes known from the state of the art, such as the so-called "shell gravity casting” process, by casting a metal material in a mold 13 composed of a metal or sand frame and at least one cavity 14 for producing the fluid conduit 4a, 4b.
  • the method comprises a step of arranging 18 in the mold 13 at least one deflection element 3.
  • the deflection element 3 is positioned at the cavity 14 of the mold which corresponds to to the fluid conduit 4a, 4b.
  • the deflection element 3 is arranged in the mold 13 so that the anchoring elements 11 of the connecting component 9 are arranged wholly or partly in a corresponding zone of the mold 13 to the wall 7 of the lower fluid duct 4a and in particular to the inter-duct wall 7.
  • the guiding components 10a, 10b of the deflection element 3 are arranged wholly or partly in the cavity 14 of the mold 13 defining the fluid conduit 4a, 4b.
  • the deflection element 3 is preferably placed in a portion of the lower fluid conduit 4a where it is hydraulically the most efficient.
  • the method then provides a step of introducing into the mold a material 15a forming a positive fluid conduit 4a, 4b.
  • This step 19 comprises a substep of filling 20 of the cavity 14 defining this fluid conduit 4a, 4b in the mold 13 by this material 15a which may be sand.
  • This material 15a envelopes all or part of the guiding component 9 of the deflection element 3.
  • This step 19 also comprises a substep 21 compression or agglomeration of this material 15a by a binder. Under these conditions, this material 15a thus arranged in the cavity 14 of the mold 13 then forms the positive of the fluid conduit 4a, 4b.
  • This positive fluid conduit 4a, 4b is a solid or semi-solid element or which comprises solid or semi-solid parts, here bonded sand, bonded or resin.
  • the deflection element 3 is positioned, during the arranging step 18, in the cavity 14 relative to the fluid conduit 4a. , 4b in the mold 13 and this, so as to be maintained in a fixed position in the duct 4a, 4b at the points of support when the walls 7, 8 of the duct 4a, 4b will be formed.
  • this material 15a envelopes all or part of the deflection element 3.
  • this method then provides a step of injection 22 of the molten metal material 15b into the mold 13.
  • Such an injection step 22 can be carried out under pressure.
  • the molten metal material 15b may be an aluminum alloy or cast iron.
  • the molten metal material 15b fills spaces left free in the mold 13 between the frame of the latter and the positive of the fluid duct 4a, 4b, in particular the spaces corresponding to the wall 7, 8 of the duct fluid fluid ie the wall relative to the sole 8 and the inter-duct wall 7.
  • the molten metal material 15b comes to wrap / partially coat the connecting component 9 and preferably completely fill the openings forming the anchoring elements 11 of this component 9 of the deflection element 3.
  • the deflection element 3 does not change state because it is made of a material having a melting temperature greater than that of the molten metal material 15b which is injected into the mold 13.
  • the method provides a cooling step 23 of the mold 13, during which the molten metal material 15b is solidified in the mold 13.
  • the method then comprises an extraction step 24 of the material 15a forming the positive of the fluid conduit 4a, 4b.
  • this step 24 once the metallic material has taken the desired shape in the mold 13, the positive of the fluid conduit 4a, 4b is then destroyed. Thus, the fluid conduit 4a, 4b described above is then generated. Subsequently, this material 15a constituting the positive fluid conduit 4a, 4b is then evacuated. With reference to the figure 4D , the sand parts thus evacuated leave room in the cylinder head 2 for the coolant circulation channels which form the fluid conduit 4a, 4b of the cylinder head 2 provided with the deflection element 3.
  • the deflection element 3 thus arranged in the cylinder head 2 makes it possible to optimize the cooling in the latter and in particular of its hottest parts, to homogenise its cooling, to optimize the flows of fluid flowing in the ducts 4a, 4b and finally to strengthen the cylinder head 2 and without degrading the strength of the fluid conduit 4a, 4b.
  • the deflection element 3 reinforces the cylinder head 2 in particular with respect to the pressures 17a generating considerable bending forces to which are added thermal and mechanical stresses due to the high temperatures 17a prevailing in the combustion chamber 5 and which have a strong impact in zones 17b of the cylinder head 2.
  • This deflection element 3 thus positioned in the cylinder head 2, in particular in this embodiment with a connecting component 9 included in the inter-duct wall 7, increases the rigidity of this wall 7 and reduces the free height h for the deformation of the lower duct 4a, and in particular in comparison with the deformation height of a lower duct of a cylinder head devoid of such a deflection element 3 which is then much larger.
  • this deflection element 3 makes it possible to prevent the cracking of this cylinder head 2, despite the high mechanical and thermal stresses it can undergo in the case of a high power engine 1.
  • the yoke 2 may include in particular several deflection elements 3 which thus make it possible to act on different portions of the fluid conduit 4a, 4b.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Pipe Accessories (AREA)
EP17173287.8A 2016-06-09 2017-05-29 Element zum umleiten einer zirkulierenden flüssigkeit in einer flüssigkeitsleitung eines krümmers Withdrawn EP3255270A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1655297A FR3052501B1 (fr) 2016-06-09 2016-06-09 Element de deviation d'un fluide circulant dans un conduit de fluide d'une culasse

Publications (1)

Publication Number Publication Date
EP3255270A1 true EP3255270A1 (de) 2017-12-13

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Family Applications (1)

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EP17173287.8A Withdrawn EP3255270A1 (de) 2016-06-09 2017-05-29 Element zum umleiten einer zirkulierenden flüssigkeit in einer flüssigkeitsleitung eines krümmers

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EP (1) EP3255270A1 (de)
FR (1) FR3052501B1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5523444U (de) * 1978-08-03 1980-02-15
JPS5554517U (de) * 1978-10-07 1980-04-12
JPS5685005U (de) * 1979-12-04 1981-07-08
JPS57200648U (de) * 1981-06-17 1982-12-20
JPS5825639U (ja) * 1981-08-14 1983-02-18 マツダ株式会社 エンジンのシリンダヘツド構造
US4522161A (en) * 1982-09-11 1985-06-11 Ae Plc Valve seat inserts
EP0177799A2 (de) * 1984-09-14 1986-04-16 Suzuki Motor Co., Ltd Vorrichtung zur Kühlung eines Zylinderdeckels einer Brennkraftmaschine
DE10316172A1 (de) * 2002-11-15 2004-06-24 Mahle Ventiltrieb Gmbh Zylinderkopf eines Verbrennungsmotors

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5523444U (de) * 1978-08-03 1980-02-15
JPS5554517U (de) * 1978-10-07 1980-04-12
JPS5685005U (de) * 1979-12-04 1981-07-08
JPS57200648U (de) * 1981-06-17 1982-12-20
JPS5825639U (ja) * 1981-08-14 1983-02-18 マツダ株式会社 エンジンのシリンダヘツド構造
US4522161A (en) * 1982-09-11 1985-06-11 Ae Plc Valve seat inserts
EP0177799A2 (de) * 1984-09-14 1986-04-16 Suzuki Motor Co., Ltd Vorrichtung zur Kühlung eines Zylinderdeckels einer Brennkraftmaschine
DE10316172A1 (de) * 2002-11-15 2004-06-24 Mahle Ventiltrieb Gmbh Zylinderkopf eines Verbrennungsmotors

Also Published As

Publication number Publication date
FR3052501B1 (fr) 2020-01-10
FR3052501A1 (fr) 2017-12-15

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