EP0484197B1 - Zylinderkopf eines Verbrennungsmotors mit eingegossenem Metalleinsatz - Google Patents

Zylinderkopf eines Verbrennungsmotors mit eingegossenem Metalleinsatz Download PDF

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Publication number
EP0484197B1
EP0484197B1 EP19910402790 EP91402790A EP0484197B1 EP 0484197 B1 EP0484197 B1 EP 0484197B1 EP 19910402790 EP19910402790 EP 19910402790 EP 91402790 A EP91402790 A EP 91402790A EP 0484197 B1 EP0484197 B1 EP 0484197B1
Authority
EP
European Patent Office
Prior art keywords
insert
cylinder head
collar
head according
ellipse
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
EP19910402790
Other languages
English (en)
French (fr)
Other versions
EP0484197A1 (de
Inventor
Christian Chapelle
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
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0484197A1 publication Critical patent/EP0484197A1/de
Application granted granted Critical
Publication of EP0484197B1 publication Critical patent/EP0484197B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons
    • 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
    • F02F1/04—Cylinders; Cylinder heads  having cooling means for air cooling
    • 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
    • F02F2001/248—Methods for avoiding thermal stress-induced cracks in the zone between valve seat openings

Definitions

  • the subject of the invention is an internal combustion engine cylinder head provided with a metal insert arranged for casting, in the zones subjected to strong temperature gradients, in particular between two valve seats.
  • inserts are generally of revolution with a cylindrical part, one end of which is arranged in the cylinder head opposite the hot surface has a folded collar intended to avoid the concentration of stresses.
  • This type of insert has the disadvantage of being sometimes driven in rotation by the tool machining the seats of the valve seats, hence a large scrap of cylinder heads considerably increasing the manufacturing costs.
  • Document DE-A-1508934 shows a tubular insert of constant elliptical cross section arranged for pouring into the wall of a tube. This insert is used to modify the thermal expansion in a part of the tube.
  • the invention aims to eliminate this drawback while ensuring a good distribution of the stresses generated in operation.
  • a cylinder head according to the invention is provided with an insert of the type comprising a folded-down circular collar and is characterized in that the body of the insert, arranged in the hot zone of the cylinder head, is a cylinder of elliptical section. gradually connecting to the circular flange.
  • the functional area of the elliptical body of the insert is located in the vicinity of the minor axis of the ellipse, the insert being arranged for casting so that the major axis of the ellipse is aligned with the right joining the centers of the seats of the valve seats between which the insert must establish a double junction.
  • connection radius of the elliptical body and the circular flange is constant over the entire periphery of the latter.
  • the angle of folding of the fallen edge constituting the flange is greater than 90 °. Finally the angles of the edge of the collar will be cut down.
  • the insert 1 made of stamped sheet metal has an axis of symmetry defined by two planes of symmetry II-II and in the plane IV-IV.
  • the body 2 of the insert is a cylinder of elliptical section.
  • the minor axis of the base ellipse is located in the II-II plane and the major axis in the IV-IV plane.
  • the body 2 is connected to a circular collar 3 produced by a beaten collar or dropped edge.
  • the radius R of connection of the dropped edge and the elliptical body is constant over the entire periphery.
  • the functional area is distributed symmetrically on either side of the minor axis of the ellipse.
  • zone Z the folding angle ⁇ of the fallen edge is greater than 90 ° and the sharp angles are cut down.
  • the large radius of the fallen edge forming the flange 3 associated with a stamped angle greater than 90 ° makes it possible to avoid peak effects which can generate stresses detrimental to the holding of the cylinder head.
  • the fallen edge 3 is embedded in the metal of the cylinder head 8 opposite the face 9 subjected to the hot gases from the combustion chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (5)

  1. Zylinderkopf eines Verbrennungsmotors mit eingegossenem Metalleinsatz, bestehend aus einem kreisförmigen, umgeschlagenen Bund, der nach der Bearbeitung der Flächen der Ventilsitze zwei getrennte Bögen bildet, die diese Flächen miteinander verbinden,
    dadurch gekennzeichnet, daß der im heißen Bereich des Zylinderkopfs angeordnete Körper (2) des Einsatzes (1) ein Zylinder mit ellyptischem Querschnitt ist, der sich in seinem Verlauf an den kreisförmigen Bund (3) anschließt.
  2. Zylinderkopf nach Anspruch 1,
    dadurch gekennzeichnet, daß sich der Funktionsbereich (Z) des ellyptischen Körpers des Einsatzes in der Nähe der kleinen Achse der Ellypse befindet, wobei der Einsatz dergestalt eingegossen wird, daß die große Achse der Ellypse auf der Geraden ausgerichtet ist, die die Mittelpunkte der Flächen der Ventilsitze 6, 7 miteinander verbindet, zwischen denen der Einsatz eine doppelte Verbindung herstellen soll.
  3. Zylinderkopf nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß der Verbindungsradius (R) von ellyptischem Körper (2) und kreisförmigem Bund (3) über die gesamte Umfangslinie des letzteren gleichbleibend ist.
  4. Zylinderkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Umbiegewinkel des abfallenden Randes, der den Bund bildet, größer als 90° ist.
  5. Zylinderkopf nach Anspruch 4,
    dadurch gekennzeichnet, daß die Kanten des Bundrandes abgerundet werden.
EP19910402790 1990-10-30 1991-10-18 Zylinderkopf eines Verbrennungsmotors mit eingegossenem Metalleinsatz Expired - Lifetime EP0484197B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9013435A FR2668403A1 (fr) 1990-10-30 1990-10-30 Insert metallique a la coulee dans une culasse de moteur a combustion interne.
FR9013435 1990-10-30

Publications (2)

Publication Number Publication Date
EP0484197A1 EP0484197A1 (de) 1992-05-06
EP0484197B1 true EP0484197B1 (de) 1994-02-16

Family

ID=9401697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910402790 Expired - Lifetime EP0484197B1 (de) 1990-10-30 1991-10-18 Zylinderkopf eines Verbrennungsmotors mit eingegossenem Metalleinsatz

Country Status (3)

Country Link
EP (1) EP0484197B1 (de)
DE (1) DE69101210T2 (de)
FR (1) FR2668403A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2883043A1 (fr) 2005-03-11 2006-09-15 Renault Sas Culasse de moteur a combustion interne munie d'insert et moteur associe

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697291B1 (fr) * 1992-10-28 1994-12-02 Peugeot Agencement d'inserts métalliques pour joints d'expansion de culasse de moteur à combustion interne.
FR2736967B1 (fr) * 1995-07-18 1997-08-29 Renault Culasse de moteur a combustion interne munie d'inserts de faible epaisseur
FR2736968B1 (fr) * 1995-07-18 1997-08-29 Renault Culasse de moteur a combustion interne munie d'un ecran thermique de pontet

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051598A (fr) * 1952-02-04 1954-01-18 Procédé d'obtention de métaux composites armés, et produits obtenus par ce procédé
US3359615A (en) * 1963-03-06 1967-12-26 Nat Lead Co Method of making a die cast cylinder for internal combustion engines
DE1508934A1 (de) * 1966-02-04 1970-03-05 Lodovico Raggi Verfahren zur Beeinflussung der Waermeausdehnung in einem ganz oder zum Teil hohlen Festkoerper mit kreisfoermigem Querschnitt und Einrichtung zur Durchfuehrung des Verfahrens
DE2533058A1 (de) * 1975-07-24 1977-02-10 Buderus Eisenwerk Gegossenes werkstueck
DE3315131A1 (de) * 1983-04-27 1984-10-31 Bayerische Motoren Werke AG, 8000 München Einlage fuer dehnfugen im brennraumseitigen bodenteil eines gegossenen leichtmetall-zylinderkopfes fuer brennkraftmaschinen, insbesondere diesel-brennkraftmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2883043A1 (fr) 2005-03-11 2006-09-15 Renault Sas Culasse de moteur a combustion interne munie d'insert et moteur associe

Also Published As

Publication number Publication date
DE69101210D1 (de) 1994-03-24
FR2668403B1 (de) 1994-12-02
FR2668403A1 (fr) 1992-04-30
EP0484197A1 (de) 1992-05-06
DE69101210T2 (de) 1994-06-16

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