EP3339617B1 - Boîtier de cylindre, procédé de fabrication d'un boîtier de cylindre et noyau de coulée - Google Patents

Boîtier de cylindre, procédé de fabrication d'un boîtier de cylindre et noyau de coulée Download PDF

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Publication number
EP3339617B1
EP3339617B1 EP17206712.6A EP17206712A EP3339617B1 EP 3339617 B1 EP3339617 B1 EP 3339617B1 EP 17206712 A EP17206712 A EP 17206712A EP 3339617 B1 EP3339617 B1 EP 3339617B1
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EP
European Patent Office
Prior art keywords
cooling
cylinder housing
cylinder
coolant
cylinders
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.)
Not-in-force
Application number
EP17206712.6A
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German (de)
English (en)
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EP3339617A1 (fr
Inventor
Paulo Urzua Torres
Martin Bier
Michael Henn
Madlen Rudloff
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.)
Volkswagen AG
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Volkswagen AG
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Publication date
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Publication of EP3339617A1 publication Critical patent/EP3339617A1/fr
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Publication of EP3339617B1 publication Critical patent/EP3339617B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • 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 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/021—Cooling cylinders

Definitions

  • the invention relates to a cylinder housing for a reciprocating piston device and to a method for producing such a cylinder housing.
  • the invention also relates to a reciprocating piston device with such a cylinder housing and an internal combustion engine with such a reciprocating piston device.
  • the invention also relates to a casting core for use in the method for producing such a cylinder housing.
  • Internal combustion engines are mostly cooled by means of a cooling liquid which, conveyed by at least one coolant pump, circulates in a cooling system of the internal combustion engine that integrates the cooling jacket.
  • the circulating coolant can dissipate thermal energy from the internal combustion engine to at least one ambient heat exchanger, in which the thermal energy is then given off to the ambient air, for example.
  • a coolant inlet is integrated in the area of top dead center, in which the cyclical to-and-fro movement of the piston guided in the corresponding cylinder is reversed and a fuel-fresh gas mixture is burned in the vicinity Cylinder is initiated, while an integration of a coolant outlet is provided near the bottom dead center of the piston movement.
  • the local cooling capacity requirement which varies along the longitudinal extension of the cylinder or cylinders, cannot be optimally met, because if the cooling system, including the cooling jacket, is adequately dimensioned, the cooling capacity requirement in the area of the top dead center of the piston movement, which occurs in this area because the primary combustion processes are highest there, "overcooling", ie excessive cooling, can occur in the other areas.
  • overcooling ie excessive cooling
  • too low a temperature of a cylinder wall often leads to a relatively high viscosity of a lubricant that keeps the friction of the relative movement between the cylinder wall and the associated piston low and thus to comparatively high friction losses and relatively high wear during operation of the internal combustion engine.
  • cylinders of an internal combustion engine can each be delimited by a so-called cylinder liner, which in turn is each received in an associated receiving opening of a cylinder housing.
  • cylinder liners can be designed as so-called "wet" cylinder liners, the outer walls of which with the walls of the associated receiving openings each delimit an annular gap which serves as a cooling jacket. Wet liners of this type have so far mainly been used in truck engines and large engines.
  • Cylinder liners in which a plurality of self-contained or spiral-shaped encircling recesses are integrated, which are provided as cooling channels of an internal combustion engine comprising the cylinder liners, are from the DE 102 25 062 A1 , of the U.S. 5,211,137 , of the U.S. 5,207,189 , of the U.S. 5,199,390 , of the U.S. 3,086,505 , of the JP H05-18319 A , of the U.S. 2,464,462 , of the EP 0 488 810 A1 and the U.S. 2,959,163 A known.
  • the US 2005/0274333 A1 discloses a cylinder liner for an internal combustion engine with integrated cooling ducts which run parallel to the longitudinal axis of the cylinder liner.
  • the EP 0 952 325 A2 discloses an internal combustion engine having a crankcase with cylinders formed by cylinder liners. Furthermore, a "cooling jacket" which surrounds the cylinder liners, represents a separate component and accommodated in the crankcase is provided. In the inner sides of the cooling jacket, partially circumferential grooves are formed which, in conjunction with the outer sides of the cylinder liners, each form a cooling channel for the cylinder.
  • the cooling channels which are separated from one another by a web formed by the adjacent cylinder liners, can have a spiral or meandering course.
  • the US 2010/0300394 A1 describes a cylinder housing with a plurality of cylinders, each of which is assigned a cooling jacket in the form of a single, spiral-shaped cooling channel.
  • a series connection of the individual cooling jackets is provided in such a way that an outlet of the cooling channel of a first cooling jacket merges into an inlet of the cooling channel of an adjacent, second cooling jacket.
  • the invention was based on the object of specifying a cylinder housing integrating cooling channels for a reciprocating piston device and in particular for an internal combustion engine, an advantageous cooling effect being achieved for the cylinder housing with the most compact dimensions possible.
  • a method for producing a cylinder housing according to the invention is the subject matter of claim 8 and a casting core for use in such a method is the subject matter of claim 10.
  • Advantageous embodiments of the cylinder housing according to the invention and the casting core according to the invention as well as preferred embodiments of the method according to the invention are the subjects of the further claims and / or emerge from the following description of the invention.
  • a preferably one-piece cylinder housing for a reciprocating piston device and in particular for a (reciprocating piston) internal combustion engine which comprises at least two cylinders, each of which is provided for receiving a piston of the reciprocating piston device.
  • the cylinder housing also has an integral cooling jacket for each of the cylinders (ie inside the cylinder housing and thus in particular not formed by cylinder liners), which surrounds the cylinder circumferentially in at least one longitudinally axial section, the cooling jackets each being divided into a plurality of closed circumferential cooling channels are divided and wherein a coolant inlet opens into at least one of the cooling jackets and a coolant outlet opens into at least one of the cooling jackets.
  • the cooling channels those that are assigned to different cylinders merge into one another between the cylinders.
  • a coolant inlet and a coolant outlet open into each of the cooling jackets, whereby an advantageous flow through for the individual cooling jackets and thus an advantageous cooling effect for the cylinder housing can be achieved.
  • the coolant inlet and the coolant outlet of the individual cooling jackets are arranged offset in the circumferential direction of the cylinder. Such an offset should at least affect the centers of the mouth cross-sections of the coolant inlets and the Relate coolant outlets. It can preferably be provided that the offset is 180 °. In this way, a flow of the same type as possible for the two sections of the individual cooling channels separated by the coolant inlets and the coolant outlets can be realized.
  • the coolant inlet and the coolant outlet are arranged at the same height in relation to the longitudinal direction of the associated cylinder.
  • the "same height" should relate at least to the mouth cross-sections as a whole and preferably to the centers of the mouth cross-sections.
  • a reciprocating piston device which can in particular be designed in the form of a (reciprocating piston) internal combustion engine, comprises at least one cylinder housing according to the invention and in each case one piston movably mounted in the cylinders of the cylinder housing.
  • the (wall) surface that comes into contact with a coolant provided for flowing through the cooling jackets can be significantly increased compared to conventional cooling jackets, resulting in a correspondingly high heat transfer of the cylinder housing on the coolant can be achieved.
  • a reduced volume flow of the coolant can thus lead to a reduced delivery rate for a working machine provided for delivering the coolant (pump with a preferred use of a cooling liquid or compressor with a likewise conceivable use of a cooling gas as a coolant), which has a positive effect on both costs and costs the weight of the work machine and thus a reciprocating piston device comprising such a work machine can affect.
  • a reciprocating piston device comprising such a work machine can affect.
  • an internal combustion engine according to the invention comprising such a reciprocating piston device. If, as usual, in such an internal combustion engine, the working machine provided for delivering the coolant is driven by the internal combustion engine itself, the reduced delivery rate achievable according to the invention can lead to a reduction in fuel consumption.
  • the relatively low volume flow of the coolant that can be achieved according to the invention can also have an indirect positive effect on the weight and also the dimensions of a cylinder housing according to the invention. This does not only apply because of a correspondingly reduced weight of the Coolant, which is particularly relevant in the case of the preferred use of a cooling liquid, but also because of the reduced structural weakening of the cylinder housing compared to a conventional cooling jacket that is not divided into a plurality of relatively small cooling channels due to the overall smaller cooling jacket and the stabilizing partition walls, which therefore also has to be compensated to a lesser extent by structural reinforcement measures.
  • the flow cross-sections of the cooling channels are designed as small as possible.
  • the flow cross-section of at least one, individual or preferably all cooling channels is smaller than the (respectively smallest) opening cross-sections of both the coolant inlet and the coolant outlet. If the flow cross-section of one or more of the cooling channels varies along its course, this should apply to (in each case) the largest flow cross-section.
  • the (smallest) flow cross-section of the cooling channels is 4 mm 2 .
  • This can particularly preferably be between 4 mm 2 and 100 mm 2 , in particular between 4 mm 2 and 25 mm 2 .
  • a production of a cylinder housing according to the invention, but at least the section thereof comprising the cooling channels, can advantageously be lost (ie not) by means of a generative manufacturing method or by casting using at least one of the cooling jackets and preferably also the coolant inlet (s) and the coolant outlet (s) reusable) core take place because these manufacturing processes advantageously allow the integration of at least partially fully closed and thus not externally accessible cavities in a cylinder housing to be produced.
  • a soluble and in particular water-soluble base material for example a salt
  • a soluble and in particular water-soluble base material for example a salt
  • a casting core according to the invention which is intended for use in a method according to the invention for producing a cylinder housing according to the invention, comprises at least a plurality of ring sections which are provided in groups in each case to form a cooling channel of one of the cooling jackets of the cylinder housing, with radially adjacent ring sections, the different of the Groups are assigned, merge into one another in a circumferential section and are thereby formed integrally.
  • Such a casting core also has an inlet section provided for forming a coolant inlet of each cooling jacket of the cylinder housing and an outlet section provided for forming a coolant outlet for each cooling jacket of the cylinder housing, the connection sections being arranged offset in the circumferential direction of the ring sections of the respective cooling jacket.
  • a casting core according to the invention can advantageously be produced by means of casting, in which case a sand mold can advantageously be used for this purpose. This applies in particular if a soluble base material, and in particular a salt, is to be used as the base material for the design of the casting core.
  • the opening cross section (s) of the coolant inlet / coolant inlets and / or the coolant outlet / coolant outlets over the entire length (in each case based on the longitudinal extent of the associated cylinder) of the Cooling jacket extends / extend so that the one or more coolant inlets and / or the one or more coolant outlets (each) open into each cooling channel of the cooling jacket assigned to them.
  • This can ensure that the cooling liquid is distributed as evenly as possible to all of the cooling channels, which in turn can have an advantageous effect with regard to the flow through the cooling channels and thus with regard to the cooling effect for such a cylinder housing.
  • the cooling jackets are only provided in sections along the longitudinal extensions of the cylinders, ie in one or more sections of the individual cylinders, or the cooling ducts of the individual cooling jackets are designed to be non-uniform along the longitudinal extensions of the cylinders and / or are arranged.
  • a non-uniform cooling effect can be realized along the longitudinal extent of the cylinder, which can be adapted as optimally as possible to the different heat transfer from the cylinders into the cylinder housing.
  • the cooling channels are only provided in a section encompassing the top dead center of a cyclical movement of the associated piston, or the cooling channels are designed in such a way that the (average) cooling effect in the top dead center comprehensive third of the longitudinal extent of the cylinder is greater than in the middle third and / or the lower third.
  • This ensures adequate cooling of the cylinder housing delimiting the cylinder in the upper third, in which the heat transfer is usually highest due to the primary combustion processes taking place there, while excessive cooling of the cylinder walls in the other sections is avoided.
  • the optimum setting of the viscosity of a lubricant acting between the cylinder walls and the outer surfaces of the pistons can be achieved in these other sections with regard to a reduction in friction.
  • a cylinder housing it can be provided that at least some, preferably all of the adjacent cooling channels of a cooling jacket (and in particular all cooling jackets) are directly connected to one another by means of at least one and preferably by means of several connecting channels.
  • These connecting channels can primarily serve to enable the formation of a sufficiently resilient casting core for the production of a cylinder housing according to the invention, which consequently has at least one, preferably several (for each pair of axially adjacent ring sections) connecting sections, the axially adjacent ring sections, which are used to form the cooling channels in the cylinder housing to be produced are provided, connect to one another.
  • the ring sections which are preferably relatively small in cross section and at the same time relatively long in the circumferential direction, can advantageously be supported against one another whereby a failure of the ring sections when casting a cylinder housing according to the invention using such a casting core can be avoided.
  • connection channels connecting the cooling channels to one another
  • at least some and preferably all of the connecting channels are designed to run obliquely with respect to the longitudinal axes of the associated cylinders.
  • the term "oblique" relates to the straight connecting line between the opening points of the individual connecting channels in the associated cooling channels.
  • a casting core according to the invention for the design of such a cylinder housing is characterized in that the connection section or sections are oriented obliquely with respect to the (preferably coaxially oriented) central longitudinal axes of the ring sections.
  • a support structure for example made of metal wires, can be integrated into the core, this support structure remaining in a cylinder housing formed using such a casting core, i.e. being integrated into it.
  • a sufficiently stable casting core can also be produced without connecting sections, these should not be provided if possible, in order to avoid a fluid-conducting connection between the cooling channels of the individual cooling jackets of the cylinder housing (with the exception of a possibly provided connection via the coolant inlets and the coolant outlets). This makes it possible to avoid flow losses which would occur when coolant flows over between the cooling channels via the connection sections, and a build-up of coolant within such connection channels.
  • the invention also relates to a motor vehicle, in particular a wheel-based motor vehicle (preferably a car or truck), with an internal combustion engine according to the invention.
  • a motor vehicle in particular a wheel-based motor vehicle (preferably a car or truck), with an internal combustion engine according to the invention.
  • the internal combustion engine can be provided in particular for (direct or indirect) provision of drive power for the motor vehicle.
  • the design of a cylinder housing according to the invention can serve not only to improve a (reciprocating) internal combustion engine but also to improve any reciprocating piston devices in which cooling is relevant through the active dissipation of thermal energy that passes from the cylinders into the respective cylinder housing. This can be the case with reciprocating compressors, for example.
  • the Fig. 1 shows in a cross section an internal combustion engine (according to the invention) with a cylinder housing 10 according to the invention.
  • This comprises a multi-part housing.
  • cylinder housing 10 which can preferably be made of metal and in particular a light metal, for example an aluminum alloy
  • a plurality of cylinders 12 arranged in series are formed.
  • a piston 14 is movably guided within each cylinder 12.
  • crank pin 18 of a crankshaft 20 which is rotatably mounted within a second housing part, which is referred to below as crankcase 22 and which connects to the underside of the cylinder housing 10.
  • An oil pan 24 is integrated into the crankcase 22, in which a reservoir of (liquid) lubricant can be kept.
  • a movement of the pistons 14 along their longitudinal axes 26 or the longitudinal axes 26 of the associated cylinders 12 is translated into a rotary movement of the crankshaft 20 by means of the connecting rod 16 and by means of the bearings of the connecting rod 16, which are arranged decentrally with respect to the axis of rotation 28 of the crankshaft 20, on the associated crank pin 18
  • This coupling of the pistons 14 to the crankshaft 20 also ensures that the directions of movement of the pistons 14 always change when the associated crank pins 18 with their longitudinal or rotational axes 30 cross the longitudinal axes 32 of the associated cylinders 12 or pistons 14.
  • top dead center characterized by the greatest possible distance of the respective pistons 14 from the axis of rotation 28 of the crankshaft 20
  • bottom dead center characterized by the position of the individual pistons as close as possible to that of the axis of rotation 28 of the crankshaft 20 Piston 14
  • the pistons 14 can move through the targeted combustion of a fuel-fresh gas mixture in combustion chambers 32, each from the top of a piston 14, a section of the associated cylinder 12 and a cylinder head 34 that adjoins the upper end of the cylinder housing 10 , limited, can be effected.
  • the initiation of such a combustion process takes place for each of the combustion chambers 32 in the (temporal) vicinity of the top dead center of the respective piston movement as a result of external ignition by means of spark plugs, not shown (if the internal combustion engine is designed as a gasoline engine) or by means of self-ignition as a result of, in particular, a relative high compression of the fuel-fresh gas mixture resulting in sufficient temperature increase (if the internal combustion engine is designed as a diesel engine).
  • the fuel is introduced into the combustion chambers 32 in a controlled manner by means of inlet valves 38 via an injector 36 and the fresh gas, which can be exclusively or mainly air. That at The exhaust gas generated during the combustion of the fuel-fresh gas mixture is then discharged from the combustion chambers 32, controlled via outlet valves 40.
  • the inlet valves 38 and the outlet valves 40 can be actuated in a known manner via one or more camshafts (not shown), which can be driven by the crankshaft 20, for example, via a so-called control drive.
  • a cooling jacket is provided for each of the cylinders 12 and consists of a plurality of closed, circumferential cooling channels 42 which are aligned parallel to one another and which are integrated in the cylinder housing 10. Furthermore, a coolant inlet 44 and a coolant outlet 46 are provided for each of the cooling jackets, these being arranged at the same height (based on the longitudinal extensions of the cylinder 12) and offset by 180 ° with respect to the longitudinal axis 26 of the respective cylinder 12 (diagonally opposite) . The coolant inlets 44 and the coolant outlets 46 open into all of the associated cooling channels 42.
  • the cooling jackets as well as the coolant inlets 44 and the coolant outlets 46 are part of a cooling system of the internal combustion engine, which also includes at least one coolant pump, which is used to pump a liquid coolant in a circuit, the coolant via the coolant inlets 44 into the respective associated cooling channels 42 flows and is discharged again from the cooling channels 42 via the respective associated coolant outlets 46.
  • the coolant absorbs thermal energy, which first transfers from the combustion chambers 32 to the adjacent walls of the cylinder housing 10 and then to the coolant flowing in the cooling channels 42. This achieves the desired cooling of the combustion chambers 32 and the cylinder housing 10 of the internal combustion engine.
  • the absorbed thermal energy is carried away from the coolant in an ambient heat exchanger (not shown) of the cooling system to a further cooling medium, in particular ambient air.
  • the coolant can then be recirculated again into the cooling jackets of the cylinder housing 10 via the coolant inlets 44.
  • the cooling jackets are each integrated into the cylinder housing 10 in only one section near the upper end of the cylinder 12, the longitudinal extent of these sections being, for example, approximately a quarter or a third of the total longitudinal extent of the cylinder 12.
  • the internal combustion engine according to Fig. 1 and at one Cylinder housing 10 according to the Fig. 2 Comprehensive internal combustion engine therefore direct cooling of the cylinder housing 10 takes place only in an area near the respective top dead center of the movements of the pistons 14.
  • FIGS Fig. 1 and 2 can, for example, by casting using a casting core 48, as for example in the Figs. 3 to 5 is shown.
  • This casting core 48 which can itself be formed, for example, by casting from a core material that includes, for example, salt as the base material, comprises a plurality of circular ring sections 50 that each serve to form a cooling channel of the cylinder housing 10 to be produced, with several (in the present case Embodiment four) groups are provided, each comprising a plurality of ring sections 50 which are arranged in coaxial alignment and axially spaced from one another.
  • Each of these groups of ring sections 50 forms a cooling jacket assigned to a cylinder 12 of the cylinder housing 10 to be produced.
  • the casting mold also forms two connection sections 52 for each of the groups of ring sections 50, which are arranged diagonally opposite one another with respect to the associated ring sections 50 and which merge into the associated ring sections 50. These connection sections 52 are provided to form a coolant inlet 44 and a coolant outlet 46 for the associated cooling jackets formed by the cooling channels 42.
  • the ring sections 50 of adjacent groups each lying at the same (axial) height, also merge into one another in one circumferential section, so that cooling channels 42 formed by the ring sections 50 a fluid-conducting connection with one another or an integral section which each belongs to two radially adjacent cooling channels 42 results.
  • This configuration of the casting core 48 or the configuration of the cooling channels 42 achieved thereby enables the integration of cooling channels 42 of sufficiently large dimensions with regard to the flow cross-sections in relatively narrow separating webs 54 (cf. Fig. 2 ; eg approx. 8 mm wide in the narrowest section), which are each formed between adjacent cylinders 12 of the cylinder housing 10 according to the invention. Consequently, despite the relatively compact dimensions of the cylinder housing 10, which is made possible by the narrow dimensioning of the separating webs 54, a sufficient cooling capacity can also be achieved in the area of these separating webs 54.
  • two axially spaced ring sections 50 are connected to one another by several (in the present embodiment four) connecting sections 56, whereby the stability of the casting core 48 in the areas of the ring sections 50 spaced apart from the connection sections 52 can be increased to prevent failure of the To avoid casting core 48 when casting a cylinder housing 10.
  • These connecting sections 56 each lead to the formation of a connecting channel (not visible) which connects two axially spaced cooling channels 42 to one another in a fluid-conducting manner. Coolant can flow over between the cooling channels 42 via the connecting channels.
  • the connecting sections 56 of the casting core 48 are oriented obliquely or non-parallel with respect to the (coaxial) central longitudinal axes 58 of the cooling channels 42 or the ring sections 50. This results in different distances (with respect to the circumferential direction) to the associated coolant inlet 44 and to the associated coolant outlet 46 and, as a result, at least slightly different hydraulic pressures in these openings for the two openings of the connecting sections 56 into the cooling channels 42. This leads to pressure gradients over the connecting sections 56, as a result of which a flow through the connecting sections 56 is promoted.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (11)

  1. Boîtier de cylindre (10) pour un dispositif à pistons alternatifs comprenant au moins deux cylindres (12), respectivement prévus pour la réception d'un piston (14) du dispositif à pistons alternatifs et comprenant, pour chacun des cylindres (12), une enveloppe de refroidissement intégrale entourant le cylindre (12) côté périphérie, les enveloppes de refroidissement étant divisées en une pluralité de canaux de refroidissement périphériques fermés (42) et une entrée de liquide de refroidissement (44) débouchant dans au moins une des enveloppes de refroidissement et une sortie de liquide de refroidissement (46) débouchant dans au moins une des enveloppes de refroidissement, parmi les canaux de refroidissement (42), ceux qui sont attribués à différents cylindres communiquant les uns avec les autres entre les cylindres (12),
    caractérisé en ce qu'une entrée de liquide de refroidissement (44) et une sortie de liquide de refroidissement (46) débouchent dans chacune des enveloppes de refroidissement, l'entrée de liquide de refroidissement (44) et la sortie de liquide de refroidissement (46) étant disposées de manière décalée dans la direction périphérique du cylindre (12) associé.
  2. Boîtier de cylindre (10) selon la revendication 1, caractérisé en ce que l'entrée de liquide de refroidissement (44) et la sortie de liquide de refroidissement (46) sont disposées à la même hauteur par rapport à la direction longitudinale du cylindre associé.
  3. Boîtier de cylindre (10) selon la revendication 1 ou 2, caractérisé en ce que la section transversale d'écoulement d'au moins un canal de refroidissement (42) est inférieure à la section transversale d'ouverture de l'entrée de liquide de refroidissement (44) et de la sortie de liquide de refroidissement (46).
  4. Boîtier de cylindre (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la ou les entrées de liquide de refroidissement (44) et/ou la ou les sorties de liquide de refroidissement (46) débouchent dans chaque canal de refroidissement (42) de l'enveloppe de refroidissement qui leur est associée.
  5. Boîtier de cylindre (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que les enveloppes de refroidissement sont prévues le long des étendues longitudinales des cylindres (12) uniquement par section ou les canaux de refroidissement (42) des enveloppes de refroidissement sont formés et/ou disposés le long des étendues longitudinales des cylindres (12) de manière non uniforme.
  6. Boîtier de cylindre (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que des canaux de refroidissement (42) voisins d'une enveloppe de refroidissement sont reliés les uns aux autres directement au moyen d'un canal de raccordement.
  7. Boîtier de cylindre (10) selon la revendication 6, caractérisé en ce que le canal de raccordement est formé en s'étendant de manière oblique par rapport à l'axe longitudinal (26) du cylindre (12) qui lui est associé.
  8. Procédé de fabrication d'un boîtier de cylindre (10) selon une quelconque des revendications précédentes, caractérisé par la formation au moyen d'un procédé de fabrication additive ou par coulée par l'utilisation d'un noyau de coulée (48) perdu, formant au moins les enveloppes de refroidissement.
  9. Procédé selon la revendication 8, caractérisé par l'utilisation d'un matériau de base soluble pour le noyau de coulée (48).
  10. Noyau de coulée (48) destiné à être utilisé dans un procédé selon la revendication 8 ou 9, caractérisé par
    - une pluralité de sections annulaires (50), qui sont destinées en groupes respectivement à la formation d'un canal de refroidissement (42) d'une des enveloppes de refroidissement, des sections annulaires (50) voisines, qui sont associées à différents groupes, communiquant les unes avec les autres dans une section périphérique et
    - respectivement une section de raccordement (52) prévue pour la formation d'une entrée de liquide de refroidissement (44) de chaque enveloppe de refroidissement et respectivement une section de raccordement (52) pour la formation d'une sortie de liquide de refroidissement (46) de chaque enveloppe de refroidissement, les sections de raccordement (52) étant disposées de manière décalée dans la direction périphérique des sections annulaires (50) de l'enveloppe de refroidissement respective.
  11. Noyau de coulée selon la revendication 10, caractérisé par au moins une section de raccordement (56), qui relie des sections annulaires (50) axialement voisines les unes avec les autres.
EP17206712.6A 2016-12-23 2017-12-12 Boîtier de cylindre, procédé de fabrication d'un boîtier de cylindre et noyau de coulée Not-in-force EP3339617B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016125619.6A DE102016125619A1 (de) 2016-12-23 2016-12-23 Zylindergehäuse, Verfahren zur Herstellung eines Zylindergehäuses und Gießkern

Publications (2)

Publication Number Publication Date
EP3339617A1 EP3339617A1 (fr) 2018-06-27
EP3339617B1 true EP3339617B1 (fr) 2021-02-17

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DE102019110566A1 (de) * 2019-04-24 2020-10-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kurbelgehäuse sowie Verfahren zu dessen Herstellung
DE102019112918B3 (de) 2019-05-16 2020-07-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kern zur Verwendung bei einer gießtechnischen Herstellung eines Kurbelgehäuses
DE102019119734B3 (de) * 2019-07-22 2020-12-03 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kühlmittelkreislauf für einen Motorblock einer Verbrennungskraftmaschine
DE102019119737A1 (de) * 2019-07-22 2021-01-28 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kühlmittelkreislauf für einen Motorblock einer Verbrennungskraftmaschine
DE102019128765B4 (de) * 2019-10-24 2022-05-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kühlmittelkreislauf für einen Motorblock einer Verbrennungskraftmaschine
DE102020128705B3 (de) 2020-11-02 2022-02-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kühlkanalanordnung zum Kühlen eines Zylindergehäuses einer Brennkraftmaschine
DE102021120984B3 (de) 2020-11-10 2022-02-03 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kurbelgehäuse für eine Verbrennungskraftmaschine
DE102020133308B3 (de) 2020-12-14 2022-02-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kühlkanalanordnung zum Kühlen eines Zylindergehäuses einer Brennkraftmaschine
CN115971424A (zh) * 2022-12-30 2023-04-18 东风商用车有限公司 一种发动机缸盖冷却结构及冷却方法

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