EP0296320B1 - Zylinderkopf für eine Brennkraftmaschine - Google Patents

Zylinderkopf für eine Brennkraftmaschine Download PDF

Info

Publication number
EP0296320B1
EP0296320B1 EP88105551A EP88105551A EP0296320B1 EP 0296320 B1 EP0296320 B1 EP 0296320B1 EP 88105551 A EP88105551 A EP 88105551A EP 88105551 A EP88105551 A EP 88105551A EP 0296320 B1 EP0296320 B1 EP 0296320B1
Authority
EP
European Patent Office
Prior art keywords
web
cylinder head
openings
insert
opening
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
EP88105551A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0296320A2 (de
EP0296320A3 (en
Inventor
Alfred Dobner
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.)
Novelis Deutschland GmbH
Original Assignee
Alcan Deutschland GmbH
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 Alcan Deutschland GmbH filed Critical Alcan Deutschland GmbH
Priority to AT88105551T priority Critical patent/ATE71187T1/de
Publication of EP0296320A2 publication Critical patent/EP0296320A2/de
Publication of EP0296320A3 publication Critical patent/EP0296320A3/de
Application granted granted Critical
Publication of EP0296320B1 publication Critical patent/EP0296320B1/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
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/28—Cylinder heads having cooling means for air cooling
    • F02F1/30—Finned cylinder heads

Definitions

  • the invention relates to a cylinder head for an internal combustion engine, which in the web area between the intake and exhaust valves of its wall delimiting the combustion chamber has at least one web insert which consists of a pouring part and is embedded in this wall such that it essentially has a main dimension extends perpendicular to their surface.
  • Such cylinder heads are already known (e.g. DE-A-2 904 940).
  • the invention is therefore based on the object in a cylinder head of the type mentioned to avoid the occurrence of hot cracks at the bottom of the expansion joints receiving the expansion joints when the cylinder head cools after it has been poured, by a corresponding reduction in the shrinkage stresses acting on the expansion joint base. Since the material stresses that arise during cooling after casting are reduced by the later heat treatment, the invention is based in particular on the object of preventing cracking by shrinkage stresses, at least until they are reduced by the heat treatment.
  • the web insert has at least one opening, a window or a side incision. In this way, a complete separation of the material of the cylinder head located on both sides of the web insert is avoided, rather the material is connected through the opening, the window or the incision.
  • the expansion joint can thus fulfill its intended function, namely the deflection of the tensile and compressive stresses caused by temperature changes into cooler material areas of the cylinder head, without cracks appearing on the base of the expansion joint.
  • the web insert can have one or more such openings or windows or side incisions, and these can have a wide variety of shapes, such as, for example, circular shape, elongated hole shape, rectangular shape, square shape or the like.
  • the area or the sum of the areas of the openings or windows or incisions should be dimensioned such that they can absorb at least the desired part of the shrinkage stresses acting on the joint base, whereby they However, it should not be larger than the smallest cross-sectional area of the web, based on (limited) the depth of the web insert, in order to act as a predetermined breaking point under operating voltages and not cancel out the effect of the expansion joint. It may be advantageous that the distance between the center of the openings or openings, windows or incisions is at least a quarter of the total depth of the web inserts.
  • FIGS. 1 to 3 have the same dimensions and are curved in their area to be poured into the cylinder head, which is at the top in the figures.
  • the insert in the embodiment according to FIG. 1 has a single window-like opening 1 in the form of an elongated hole, while the embodiment according to FIG. 2 instead has three window-like openings 2 in a circular shape.
  • two rows of smaller, hole-like openings 3 with a circular cross section are provided.
  • Figure 4 illustrates that the web inserts are poured into the cylinder head 1 only with their curved part containing the opening 1, in such a way that their main dimensions extend substantially perpendicular to their surface.
  • the other part of the web inlays forms a holding tab 10, which serves to fix the web inlay in the casting mold during casting. It is then separated from the finished casting with its length protruding beyond the casting surface 11 by mechanical processing.
  • 4 also shows the gap width s which would result in the case of cylinder heads 4 with a web insert 5 cast therein, which does not have the openings, windows or incisions provided according to the invention.
  • FIG. 5 and 6 show a cylinder head which has two web inserts 8 which are arranged on the two sides of the web 7 located in the cylinder head floor between the valve openings 6.

Landscapes

  • 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)
EP88105551A 1987-06-25 1988-04-07 Zylinderkopf für eine Brennkraftmaschine Expired - Lifetime EP0296320B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88105551T ATE71187T1 (de) 1987-06-25 1988-04-07 Zylinderkopf fuer eine brennkraftmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3721029 1987-06-25
DE19873721029 DE3721029A1 (de) 1987-06-25 1987-06-25 Zylinderkopf fuer eine brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP0296320A2 EP0296320A2 (de) 1988-12-28
EP0296320A3 EP0296320A3 (en) 1989-11-29
EP0296320B1 true EP0296320B1 (de) 1992-01-02

Family

ID=6330294

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105551A Expired - Lifetime EP0296320B1 (de) 1987-06-25 1988-04-07 Zylinderkopf für eine Brennkraftmaschine

Country Status (5)

Country Link
US (1) US4854275A (cg-RX-API-DMAC10.html)
EP (1) EP0296320B1 (cg-RX-API-DMAC10.html)
AT (1) ATE71187T1 (cg-RX-API-DMAC10.html)
DE (2) DE3721029A1 (cg-RX-API-DMAC10.html)
ES (1) ES2027721T3 (cg-RX-API-DMAC10.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3837254A1 (de) * 1988-11-03 1990-05-10 Bayerische Motoren Werke Ag Leichtmetall-einlage fuer die bildung einer dehnfuge in aus leichtmetallguss gebildeten brennraumwaenden von brennkraftmaschinen, insbesondere zylinderkopfboden von diesel-brennkraftmaschinen
EP3374621B1 (en) 2015-11-11 2020-10-28 Ford Otomotiv Sanayi Anonim Sirketi Multi-piece cylinder head
DE102018007546A1 (de) * 2018-09-25 2020-03-26 Rheinisch-Westfälische Technische Hochschule (Rwth) Aachen Verfahren zur Herstellung eines Hybridbauteils

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1734875U (de) * 1955-02-12 1956-11-29 Daimler Benz Ag Zylinderkopf.
DE1294093B (de) * 1967-10-25 1969-04-30 Kloeckner Humboldt Deutz Ag Zylinderkopf fuer Brennkraftmaschinen
DE2904940C2 (de) * 1979-02-09 1983-04-21 Klöckner-Humboldt-Deutz AG, 5000 Köln Leichtmetallzylinderkopf für eine ventilgesteuerte Brennkraftmaschine
DE3034591C2 (de) * 1980-09-13 1985-10-03 Klöckner-Humboldt-Deutz AG, 5000 Köln Leichtmetallzylinderkopf für eine ventilgesteuerte Brennkraftmaschine

Also Published As

Publication number Publication date
EP0296320A2 (de) 1988-12-28
US4854275A (en) 1989-08-08
DE3867331D1 (de) 1992-02-13
DE3721029C2 (cg-RX-API-DMAC10.html) 1989-09-21
EP0296320A3 (en) 1989-11-29
ES2027721T3 (es) 1992-06-16
DE3721029A1 (de) 1989-01-05
ATE71187T1 (de) 1992-01-15

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