EP0433125B1 - Verfahren zur Herstellung einer Zündkerzöffnung in einem Zylinderkopf einer Brennkraftmaschine - Google Patents

Verfahren zur Herstellung einer Zündkerzöffnung in einem Zylinderkopf einer Brennkraftmaschine Download PDF

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Publication number
EP0433125B1
EP0433125B1 EP90403400A EP90403400A EP0433125B1 EP 0433125 B1 EP0433125 B1 EP 0433125B1 EP 90403400 A EP90403400 A EP 90403400A EP 90403400 A EP90403400 A EP 90403400A EP 0433125 B1 EP0433125 B1 EP 0433125B1
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EP
European Patent Office
Prior art keywords
spark plug
cylinder head
tubular
core
tubular element
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.)
Expired - Lifetime
Application number
EP90403400A
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English (en)
French (fr)
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EP0433125A1 (de
Inventor
Luc Schwab
Jacques Dore
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen 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 FR8916655A external-priority patent/FR2656042B1/fr
Priority claimed from FR9006481A external-priority patent/FR2662471B1/fr
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0433125A1 publication Critical patent/EP0433125A1/de
Application granted granted Critical
Publication of EP0433125B1 publication Critical patent/EP0433125B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]

Definitions

  • the present invention relates to a method of producing spark plug wells in a cylinder head of an internal combustion engine obtained by molding, a spark plug well element intended to be used for the implementation of this method as well as a set of for the formation of candle wells.
  • Figures 2 and 3 show another distribution configuration where the cylinder head 1 is also traversed right through by a bore P perpendicular to the wells 5 by crossing the latter near their lower ends so as to allow a circulation of air preventing condensation, source of poor ignition.
  • this known embodiment in addition to the drawbacks already mentioned above in connection with FIG. 1, also has the drawback that the drilling P in communication with the spark plug wells 5 is expensive and is carried out in a mass of cylinder head material reserved for this purpose. effect in the water chamber, which complicates molding and increases the risk of faults in the material, in particular the appearance of cracks.
  • GB-A-1 256 401 describes a cylinder head of an internal combustion engine, obtained by molding and which comprises a spark plug well in the form of a tubular piece added after the molding of the cylinder head.
  • this prior document does not pose the problem of producing spark plug wells during the molding of the cylinder head.
  • GB-A-1 075 951 relates to the fixing of intake and exhaust ducts in a cylinder head, but this document is silent on how the tubular element 19 or 20 is positioned relative to the sand core 22.
  • FR-A-2 431 335 discusses the difficulties of placing metal inserts in a mold but proposes a process which is completely distant from the process which is the subject of the invention and which consists in hot spraying a metal layer onto a core beforehand hardened.
  • the object of the present invention is to eliminate the above drawbacks by proposing a method for producing at least one spark plug well in a cylinder head of an internal combustion engine obtained by molding, of the type where the cylinder head mold comprises several different cores corresponding respectively to hollowed out parts of the cylinder head to be molded comprising in particular the intake and exhaust conduits and the oil and water chambers, the cores being made of compressed sand and previously produced in boxes with cores and consisting in introducing into a suitable one of the cores a tubular element constituting the spark plug well, firmly holding this tubular element in the core by a holding element integral with the tubular element and fixed in the core after compression of the sand constituting the core and then to place and maintain the core - tubular element assembly in the cylinder head mold during the operation pouring ration of the latter.
  • the holding element is constituted by a collar secured to the body of the tubular element.
  • the tubular element is held in the core of the aforementioned oil chamber and is further introduced by its lower part into the core of the water chamber situated below the core of the oil chamber.
  • the tubular element is positioned in the cylinder head mold by a positioning foot integral with the mold cover and engaged in the upper part of the tubular element until it comes into abutment by a shoulder on the edge of the upper opening of the tubular element.
  • the aforementioned holding element is constituted by a tubular support element made integral with the core of the aforementioned water chamber and fixed substantially to the lower part of the tubular element.
  • the spark plug well tubular element is held in a fixed position in the cylinder head mold during the casting operation of the latter by the aforementioned tubular support element which remains in the cylinder head in its final state and puts in communication l candle well element with atmosphere.
  • the spark plug well elements are supported by several successively aligned support elements communicating with each other through spark plug well elements , the two extreme support elements being secured to the mold of the cylinder head during the casting of the latter.
  • the different the aforementioned tubular elements are joined together before their installation in a core box intended to form water chambers of the cylinder head during molding, the lower part of each tubular candle well element is trapped in the corresponding core constituted of compressed sand and the tubular elements-cores assembly is then positioned in the cylinder head mold.
  • tubular support elements have a rectangular or square section and the various tubular elements are joined together by welding.
  • Each tubular spark plug well element is positioned in the cylinder head mold by a positioning foot integral with the mold cover and engaged in the upper part of the tubular spark plug well element.
  • the tubular element is drilled at its bottom to communicate with a threaded hole provided in the cylinder head for the passage of the threaded base of a spark plug and its fixing in the cylinder head.
  • the invention also provides a core-element candle well element intended to be used for the implementation of the method of the first embodiment defined above and characterized in that it comprises a tubular body comprising a bottom, a upper opening opposite the bottom for the passage of a spark plug and a soldar collar of the body of the tubular element and ensuring the maintenance in position of the tubular element in the core of the oil chamber after compression of the constituent material.
  • the edge of the upper opening of the tubular element comprises a collar.
  • the side wall of the tubular element has a relatively small thickness, for example around 1 to 1.5 mm.
  • the flange is either attached by welding to the tubular element, or obtained by deformation of the latter and the tubular element is made of steel or aluminum.
  • the tubular element is made of ceramic and the collar comes in shape with the tubular element.
  • the invention also provides a set of elements intended for the formation of at least one candle well according to the second embodiment and characterized in that it comprises at least one tubular element of candle well and at least one element tubular support for the spark plug well element fixed, preferably by welding, perpendicular to the latter by opening therein.
  • the assembly comprises several tubular elements for supporting spark plug well elements and successively aligned, two successive support elements opening into the same spark plug well element.
  • each aforementioned tubular element has a relatively small thickness, of approximately 1 to 1.5 mm.
  • FIG. 7 represents a part of the cylinder head 1 of a combustion engine intended to be mounted on a motor vehicle.
  • the cylinder head 1 is for example made of light alloy cast according to the so-called "shell" technique, either under low pressure or by gravity and generally comprises, as is already known per se, an oil chamber 2, a water 3 located below the oil chamber 2 and the intake 4a and exhaust 4b conduits.
  • the mixed lines symbolize the protective covers C of the engine distribution (not shown) and which are fixed on the cylinder head 1.
  • the oblique axes X1-X2 and X3-X4 respectively symbolize the axes of passage of the guides of exhaust and intake valves (not shown) which are controlled by the distribution according to which the intake and exhaust of the working fluid take place.
  • the oil 2 and water 3 chambers substantially coaxially surround a spark plug well 5 intended to receive a spark plug 7 of which only the upper part 7a and the threaded base 7b have been shown.
  • the spark plug well 5 has at its bottom a hole 8 for the passage of the threaded base 7b of the spark plug 7, which is screwed into a corresponding tapped hole 9 of the cylinder head 1 so that the electrodes of the spark plug 7 found in the combustion chamber 10 delimited by the cylinder head 1.
  • the spark plug well 5 comprises a tubular element 11 of cylindrical shape of revolution inserted in the cylinder head 1 during the casting thereof.
  • the element 11, arranged in the case present vertically in the cylinder head 1, has its side wall forming a body 11a of a relatively small thickness, for example from 1 to 1.5 mm and can be made of steel, aluminum or ceramic.
  • the tubular element 11 comprises a collar 11b which is attached in the present case by welding to the body 11a of the latter but which can also be produced by deformation of the tubular element 11 as shown in FIG. 6.
  • the collar 11b can also have come in shape with the tubular element 11 in the case where the latter is ceramic.
  • the tubular element 11 also includes a collar 11c formed by lifting the edge of the upper opening of the element 11 opposite its bottom comprising the bore 8.
  • FIG. 4 represents the mold for the casting of the cylinder head 1 and which is of the type comprising different cores corresponding to the hollowed-out parts of the cylinder head to be molded and constituted in particular by the intake 4a and exhaust 4b conduits, the chamber oil 2 and the water chamber 3.
  • the cores 12-15 correspond respectively to the oil 2 and water 3 chambers and to the intake 4a and exhaust 4b conduits and preferably consist of compressed sand allowing the reserve of these hollow parts to be cast.
  • These cores 12-15 are previously produced in core boxes, the most important of which for the invention is the core box 16 of the oil chamber 2 shown in FIG. 5.
  • the box 16 which thus makes it possible to produce the core 12 of the oil chamber 2 comprises three parts 16a, 16b and 16c defining, when assembled together, an internal chamber in which the core sand 12 is formed and compressed.
  • the tubular element 11 is introduced into the sand constituting the core 12 in which it is securely held, after compression of the sand in the box 16, by the flange 11b, so as not to slip after the withdrawal of the box 16 during demolding. of the core 12.
  • the tubular element 11 is thus trapped in the core 12 with its upper part comprising the collar 11c and its lower part outside the core 12.
  • the collar 11b is located halfway up the tubular element 11, but it is obvious that its position is determined by its function which is to maintain the element 11 in the core 12.
  • the core 12-tubular element 11 assembly is then placed in the cylinder head mold 1, the tubular element being further introduced by its lower part inside the core 13 of the water chamber 3 in which has been previously made a corresponding passage hole to allow this introduction.
  • the cylinder head mold 1 is conventionally composed of a base 17 comprising a metal part 18 ensuring the compression effect during the casting of the cylinder head 1, a side yoke 19 and a cover 20.
  • the different cores, in particular the cores 12 and 13 are held in the mold of the cylinder head 1 by suitable means, not shown, also allowing the tubular element 11 to be held in position during the casting of the cylinder head 1.
  • the cover 20 comprises, approximately at its center and integral with it, a foot 21 with shoulder 22 engaging in the upper part of the tubular element 11 to ensure its positioning or centering in the mold of the cylinder head 1 with the shoulder 22 coming to bear on the collar 11c of the tubular element 11.
  • the tubular element 11 is partially embedded in the cylinder head 1 as shown in FIG. 7 and the hole 8 has been made in the bottom 11d of the tubular element 11 for communicate with the tapped hole 9 into which the base 7b of the spark plug 7 is screwed.
  • the relatively small thickness of the tubular element 11 mentioned above ensures that this element has good mechanical strength while making it possible to gain approximately 3 mm over this thickness relative to the well obtained by casting according to the method represented in FIG. 1.
  • This gain in thickness makes the presence of the zones corresponding to the water chamber 3 in which the cooling water circulates between each spark plug well and the valve guides less critical. Indeed, in certain engine configurations, in particular when it is necessary to tilt the spark plug well 5 on the side of the exhaust or intake ducts in the cylinder head 1, there are places where there is practically no more room to create the water passage.
  • the gain of 3 mm in thickness achieved thanks to the tubular element 11 of the invention makes it easier to create the film of water necessary for cooling.
  • each spark plug well 5 is also formed by a tubular element 11 of cylindrical shape of revolution inserted in the cylinder head 1 during the casting of it.
  • the element 11, arranged in the case present vertically in the cylinder head 1, has its side wall of a relatively small thickness, for example from 1 to 1.5 mm and can be made for example of steel.
  • Tubular elements 23, preferably made of a material identical to that of elements 11 and of rectangular or square section, are also inserted into the cylinder head 1 during its casting and are successively aligned transversely to the longitudinal axis of the tubular elements 11 of wells candle.
  • the number of elements 23 of course depends on the number of engine cylinders.
  • This figure shows the mold for casting the cylinder head 1 and which is of the type comprising different cores corresponding to the recessed parts of the cylinder head to be molded and formed by the intake 4a and exhaust 4b conduits, the oil chamber 2 and the water chamber 3.
  • the cores 12-15 correspond respectively to the oil 2 and water 3 chambers and to the intake 4a and exhaust 4b conduits and are preferably made of compressed sand allowing the casting the reservation of these hollowed out parts.
  • the cores 12-15 are previously produced in core boxes known per se, which cores, once formed, are held in the mold of the cylinder head 1 by suitable means known per se and not shown.
  • the various tubular elements 11 and 23 are put in place in the box for forming the cores 13 corresponding to the water chambers 3 of the cylinder head 1. Before being placed in this box, the tubular elements 23 are joined by welding to the elements. tubular 11 to thereby form an inseparable assembly with controllable known geometric and dimensional characteristics. Once the unitary assembly thus formed positioned in the core box, the core formation sand 13 is compressed around the part bottom of the spark plug well elements 11. The assembly of elements 11, 23 and cores 13 is then removed from the core box and introduced into the mold 1 to be held there in a fixed position.
  • each tubular element 11 is introduced through a corresponding passage hole previously made in the corresponding oil core 12 and the two free ends respectively of the two end support elements 11 are suitably secured to the mold.
  • the latter is conventionally composed of a base 17 comprising a metal part 18 ensuring the compression effect during the casting of the cylinder head 1, a side yoke 19 and a cover 20.
  • the latter comprises, approximately in its center and integral with it, feet 21 respectively engaging in the upper parts of the tubular element 11 to ensure its positioning or centering in the mold of the cylinder head 1.
  • each tubular element 11 is embedded in the cylinder head as shown in Figure 8 and the hole 8 is made at the bottom of the tubular element 11 to communicate with the threaded hole 9 in which is screwed on the spark plug cap 7.
  • the cylinder head 1 according to the invention is thus provided with elements 23 forming ventilation ducts by air circulation coming from foundry communicating with the spark plug well elements 11 and the circulation of water in the chamber 3 will be optimum since better cooling of the cylinder head during operation is achieved thanks to the relatively small thickness of the spark plug well elements 11.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (21)

  1. Verfahren zur Herstellung wenigstens eines Zündkerzenschachtes in einem durch Formgiessen erhaltenen Zylinderkopf einer Brennkraftmaschine, derjenigen Gattung, bei welcher die Giessform des Zylinderkopfes (1) mehrere jeweils ausgehöhlten Teilen (2, 3, 4a, 4b) des zu giessenden Zylinderkopfes entsprechende verschiedene Kerne (12-15) aufweist, welcher Zylinderkopf insbesondere Einlass- und Auslasskanäle (4a) und (4b) und Ol- und Wasserkammern (2) und (3) aufweist, wobei die Kerne (12-15) aus zusammengedrücktem Sand bestehen und vorher in Kernkasten (16) hergestellt worden sind, und das darin besteht, ein den Zündkerzenschacht bildendes rohrförmiges Element (11) in dem geeigneten einen (12 ; 13) der Kerne einzuführen, dieses rohrförmige Element (11) in dem Kern (12 ; 13) durch ein mit dem rohrförmigen Element (11) fest verbundenes Halteelement (11b, 23) festzuhalten, welches Halteelement in dem Kern (12 ; 13) nach Zusammendrücken des dem Kern (12 ; 13) bildenden Sandes befestigt ist und dann die Gesamtheit aus Kern (12 ; 13) -rohrförmigem Element (11) in die Giessform des Zylinderkopfes (1) während dem Vorgang zum Giessen dieses Letzteren einzusetzen und dort zu halten.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das vorgenannte Halteelement durch einen mit dem Körper (11a) des rohrförmigen Elementes (11) fest verbundenen Bund (11b) gebildet ist.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das rohrförmige Element (11) in dem Kern (12) der vorgenannten Olkammer (2) gehalten wird und ausserdem mit seinem unteren Teil in den Kern (13) der unterhalb des Kernes (12) der Olkammer (2) gelegenen Wasserkammer (3) eingeführt wird.
  4. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das rohrförmige Element (11) in der Giessform des Zylinderkopfes (1) durch einen mit dem Deckel (20) der Giessform festverbundenen Positionierfuss (21) positioniert wird, welcher Fuss in den oberen Teil des rohrförmigen Elementes (11) eingeführt wird, bis er mit einer Schulter (22) desselben zum Anschlag an dem Rand der oberen Offnung des rohrförmigen Elementes (11) kommt.
  5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das vorgenannte Halteelement durch ein rohrförmiges Tragelement (23) gebildet wird, welches mit dem Kern (13) der vorgenannten Wasserkammer (3) fest verbunden und etwa an dem unteren Teil des rohrförmigen Elementes (11) befestigt ist.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass das rohrförmige Zündkerzenschachtelement (11) in ortsfester Stellung in der Giessform des Zylinderkopfes (1) während des Giessvorganges dieses Letzeren durch das rohrförmige Tragelement (23) gehalten wird, welches in dem Zylinderkopf (1) in seinem Endzustand verbleibt und das Zündkerzenschachtelement (11) mit der Aussenluft in Verbindung setzt.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass zur Herstellung von mehreren jeweils mehreren Zylindern des Motors zugeordneten Zündkerzenschächten (5) es darin besteht, die Zündkerzenschachtelemente (11) durch mehrere aufeinanderfolgend fluchtend ausgerichtete Tragelemente (23) zu tragen, welche miteinander durch die Zündkerzenelemente (11) hindurch in Verbindung stehen, wobei die beiden Endtragelemente (23) mit der Giessform des Zylinderkopfes (1) während des Giessens dieses Letzteren fest verbunden sind.
  8. Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass es darin besteht , die verschiedenen vorgenannten rohrförmigen Elemente (11, 23) vor ihrem Einsetzen in einen Kernkasten (13), dessen Kerne dazu bestimmt sind, die Wasserkammern (3) des Zylinderkopfes nach dem Formgiessen zu bilden, miteinander fest zu verbinden, den unteren Teil jedes rohrförmigen Zündkerzenschachtelementes (11) in dem entsprechenden, durch zusammengedrückten Sand gebildeten Kern (13) einzuschliessen und danach die Gesamtheit aus rohrförmigen Elementen (11, 23) und Kernen (13) in der Giessform des Zylinderkopfes (1) zu positionieren.
  9. Verfahren nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass die vorgenannten rohrförmigen Tragelemente (23) einen rechteckigen oder quadratischen Querschnitt haben.
  10. Verfahren nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass die verschiedenen vorgenannten rohrförmigen Elemente (11, 23) miteinander durch Schweissen fest verbunden sind.
  11. Verfahren nach einem der Ansprüche 5 bis 10, dadurch gekennzeichnet, dass jedes rohrförmige Element (11) in der Giessform des Zylinderkopfes (1) durch einen mit dem Deckel (20) der Giessform festverbundenen und in den oberen Teil des rohrförmigen Elementes (11) eingeführten Positionierfuss (21) positioniert wird.
  12. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass, nach dem Giessen des Zylinderkopfes (1), das rohrförmige Element (11) in seinem Boden (11d) durchbohrt wird, um mit einem in dem Zylinderkopf (1) für die Durchführung des Gewindegehäuses (7b) einer Zündkerze (7) und ihrer Befestigung in dem Zylinderkopf (1) vorgesehenen Gewindeloch (9) in Verbindung zu sein.
  13. Zur Verwendung für die Durchführung des wie in wenigstens im Anspruch 1 bestimmten Verfahrens bestimmte Gesamtheit aus Kern (12) und Zündkerzenschachtelement, dadurch gekennzeichnet, dass sie einen rohrförmigen Körper (11a) aufweist, mit einem Boden (11d), einer dem Boden (11d) entgegengesetzten oberen Offnung für die Durchführung einer Zündkerze (7) und einem mit dem Körper (11a) des rohrförmigen Elementes (11) fest verbundenen Bund (11B), der das Instellunghalten des rohrförmigen Elementes (11) in dem Kern (12) der Olkammer (2) nach dem Zusammendrücken des den besagten Kern (12) bildenden Werkstoffes gewährleistet.
  14. Gesamtheit aus Kern (12) und Zündkerzenschachtelement gemäss Anspruch 12, dadurch gekennzeichnet, dass der Rand der oberen Offnung des rohrförmigen Elementes (11) einen Flansch (11c) aufweist.
  15. Gesamtheit aus Kern (12) und Zündkerzenschachtelement gemäss Anspruch 13 oder 14, dadurch gekennzeichnet, dass die Seitenwand des rohrförmigen Elementes (11) eine verhältnismässig schwache Dicke zum Beispiel von ungefähr 1 bis 1,5 mm hat.
  16. Gesamtheit aus Kern (12) und Zündkerzenschachtelement nach Anspruch 13, dadurch gekennzeichnet, dass der Bund (11b) am Körper (11a) des rohrförmigen Elementes (11) durch Schweissen angebracht oder durch Verformung dieses Körpers erhalten wird.
  17. Gesamtheit aus Kern (12) und Zündkerzenschachtelement nach Anspruch 16, dadurch gekennzeichnet, dass das rohrförmige Element (11) aus Stahl oder Aluminium besteht.
  18. Gesamtheit aus Kern (12) und Zündkerzenschachtelement nach einem der Ansprüche 13 10 bis 17, dadurch gekennzeichnet, dass das rohrförmige Element (11) aus Keramik besteht und der Bund (11b) an dem rohrförmigen Element (11) angeformt wird.
  19. Zur Bildung von wenigstens eines Zündkerzenschachtes gemäss dem wie in wenigstens dem Anspruch 6 bestimmten Verfahren bestimmte Gesamtheit aus Elementen, dadurch gekennzeichnet, dass sie wenigstens ein rohrföhrmiges Zündkerzenschachtelement (11) und wenigstens ein rohrförmiges Element (23) zum Tragen des Zündkerzenschachtelementes (11) aufweist, welches Tragelement vorzugsweise durch Schweissen senkrecht zum Zündkerzenelement befestigt ist und in diesem ausmündet.
  20. Gesamtheit nach Anspruch 19, dadurch gekennzeichnet, dass in dem Fall von mehreren zu bildenden Zündkerzenschächten (1) sie mehrere rohrförmige Elemente (23) zum Tragen von aufeinanderfolgend fluchtend ausgerichteten rohrförmigen Zündkerzenschachtelementen (11) umfasst, wobei zwei aufeinanderfolgende Tragelemente (23) in ein selbes Zündkerzenschachtelement (11) ausmünden.
  21. Gesamtheit nach Anspruch 19 oder 20, dadurch gekennzeichnet, dass jedes vorgenannte rohrförmige Element eine verhältnismässig schwache Dicke von ungefähr 1 bis 1,5 mm hat.
EP90403400A 1989-12-15 1990-11-29 Verfahren zur Herstellung einer Zündkerzöffnung in einem Zylinderkopf einer Brennkraftmaschine Expired - Lifetime EP0433125B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8916655 1989-12-15
FR8916655A FR2656042B1 (fr) 1989-12-15 1989-12-15 Procede de realisation de puits de bougie dans une culasse d'un moteur a combustion interne et element de puits de bougie destine a etre utilise pour la mise en óoeuvre de ce procede.
FR9006481 1990-05-23
FR9006481A FR2662471B1 (fr) 1990-05-23 1990-05-23 Procede de realisation de puits de bougie dans une culasse d'un moteur a combustion interne et ensemble d'elements destine a former au moins un tel puits de bougie.

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EP0433125A1 EP0433125A1 (de) 1991-06-19
EP0433125B1 true EP0433125B1 (de) 1993-12-15

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DE (1) DE69005276T2 (de)

Cited By (1)

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DE102013214534A1 (de) * 2013-07-25 2015-01-29 Bayerische Motoren Werke Aktiengesellschaft Gießvorrichtung und Gießverfahren

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DE10117163A1 (de) * 2001-04-06 2002-10-10 Bayerische Motoren Werke Ag Einsatzrohr für einen Zylinderkopf mit Deckel einer Brennkraftmaschine
CN102877976A (zh) * 2012-09-30 2013-01-16 于洪伟 一种发动机用气缸盖及其加工工艺

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DE102013214534A1 (de) * 2013-07-25 2015-01-29 Bayerische Motoren Werke Aktiengesellschaft Gießvorrichtung und Gießverfahren
US10618105B2 (en) 2013-07-25 2020-04-14 Bayerische Motoren Werke Aktiengesellschaft Casting device and casting method
DE102013214534B4 (de) * 2013-07-25 2021-07-01 Bayerische Motoren Werke Aktiengesellschaft Gießvorrichtung und Gießverfahren

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