EP0484197A1 - Zylinderkopf eines Verbrennungsmotors mit eingegossenem Metalleinsatz - Google Patents

Zylinderkopf eines Verbrennungsmotors mit eingegossenem Metalleinsatz Download PDF

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Publication number
EP0484197A1
EP0484197A1 EP91402790A EP91402790A EP0484197A1 EP 0484197 A1 EP0484197 A1 EP 0484197A1 EP 91402790 A EP91402790 A EP 91402790A EP 91402790 A EP91402790 A EP 91402790A EP 0484197 A1 EP0484197 A1 EP 0484197A1
Authority
EP
European Patent Office
Prior art keywords
insert
cylinder head
combustion engine
internal combustion
seats
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91402790A
Other languages
English (en)
French (fr)
Other versions
EP0484197B1 (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 a metal insert placed in the casting, in an internal combustion engine cylinder head, in the zones subjected to strong temperature gradients, in particular between two valve seats.
  • the invention also relates to a cylinder head fitted with such inserts.
  • 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 surfaces of the valve seats, hence a large scrap of cylinder heads considerably increasing the manufacturing costs.
  • the invention aims to eliminate this drawback while ensuring a good distribution of the stresses generated in operation.
  • an insert according to the invention is of the type comprising a folded-down circular collar and it is characterized in that the body of the insert, arranged in the hot zone of the cylinder head, is a cylinder of elliptical section connecting to the circular collar gradually.
  • 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.
  • the radius of connection of the elliptical body and the circular collar 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 fallen 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 cause 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)
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
FR9013435 1990-10-30
FR9013435A FR2668403A1 (fr) 1990-10-30 1990-10-30 Insert metallique a la coulee dans une culasse de moteur a combustion interne.

Publications (2)

Publication Number Publication Date
EP0484197A1 true EP0484197A1 (de) 1992-05-06
EP0484197B1 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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697291A1 (fr) * 1992-10-28 1994-04-29 Peugeot Agencement d'inserts métalliques pour joints d'expansion de culasse de moteur à combustion interne.
FR2736968A1 (fr) * 1995-07-18 1997-01-24 Renault Culasse de moteur a combustion interne munie d'un ecran thermique de pontet
FR2736967A1 (fr) * 1995-07-18 1997-01-24 Renault Culasse de moteur a combustion interne munie d'inserts de faible epaisseur
FR2883043A1 (fr) * 2005-03-11 2006-09-15 Renault Sas Culasse de moteur a combustion interne munie d'insert et moteur associe

Citations (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
EP0126922A1 (de) * 1983-04-27 1984-12-05 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Einlage für Dehnfugen im brennraumseitigen Bodenteil eines gegossenen Leichtmetall-Zylinderkopfes für Brennkraftmaschinen, insbesondere Diesel-Brennkraftmaschinen

Patent Citations (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
EP0126922A1 (de) * 1983-04-27 1984-12-05 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Einlage für Dehnfugen im brennraumseitigen Bodenteil eines gegossenen Leichtmetall-Zylinderkopfes für Brennkraftmaschinen, insbesondere Diesel-Brennkraftmaschinen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697291A1 (fr) * 1992-10-28 1994-04-29 Peugeot Agencement d'inserts métalliques pour joints d'expansion de culasse de moteur à combustion interne.
EP0595676A1 (de) * 1992-10-28 1994-05-04 Automobiles Peugeot Zusammenstellen von Metalleinsätze für Dehnungsfuge im Zylinderkopf einer Brennkraftmaschine
FR2736968A1 (fr) * 1995-07-18 1997-01-24 Renault Culasse de moteur a combustion interne munie d'un ecran thermique de pontet
FR2736967A1 (fr) * 1995-07-18 1997-01-24 Renault Culasse de moteur a combustion interne munie d'inserts de faible epaisseur
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
DE69101210T2 (de) 1994-06-16
FR2668403B1 (de) 1994-12-02
DE69101210D1 (de) 1994-03-24
EP0484197B1 (de) 1994-02-16
FR2668403A1 (fr) 1992-04-30

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