EP0199311A2 - Méthode pour insérer à la coulée des pièces raffortées dans une culasse - Google Patents

Méthode pour insérer à la coulée des pièces raffortées dans une culasse Download PDF

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Publication number
EP0199311A2
EP0199311A2 EP86105411A EP86105411A EP0199311A2 EP 0199311 A2 EP0199311 A2 EP 0199311A2 EP 86105411 A EP86105411 A EP 86105411A EP 86105411 A EP86105411 A EP 86105411A EP 0199311 A2 EP0199311 A2 EP 0199311A2
Authority
EP
European Patent Office
Prior art keywords
cylinder head
holding device
insert
cast
bore
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
EP86105411A
Other languages
German (de)
English (en)
Other versions
EP0199311A3 (en
EP0199311B1 (fr
Inventor
Toni Schmitz
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to AT86105411T priority Critical patent/ATE55808T1/de
Publication of EP0199311A2 publication Critical patent/EP0199311A2/fr
Publication of EP0199311A3 publication Critical patent/EP0199311A3/de
Application granted granted Critical
Publication of EP0199311B1 publication Critical patent/EP0199311B1/fr
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
    • 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 invention relates to a cylinder head with bores receiving cylinder head screws according to the preamble of claim 1.
  • a cylinder head is known in which inserts designed as sleeves are arranged to introduce the forces to be transmitted from the cylinder head bolts to the cylinder head. These sleeves protrude from the cylinder head cover side of the cylinder head and are fixed in the molded body during the casting process of the cylinder head. In this known cylinder head, the sleeves are finished before the casting process. They must therefore be positioned very precisely in the molded body. Since the sleeve and the bores located at the sleeves have on the cylinder head base side subsequent cylinder head bores of different diameters, they have a respective exact match mold core during the process G inte- be filled.
  • the cylinder head is unusable, since reworking the bores, among other things. is not possible due to the small sleeve thickness.
  • the known cylinder head must therefore be manufactured with a high level of manufacturing technology and casting technology.
  • the invention has for its object to form deposits for the introduction of forces to be transmitted via the cylinder head screws to the Z y-cylinder head in such a way that small tolerance deviations with regard to the positioning remain without an adverse influence on the further usability of the cast cylinder head.
  • the insert consists of solid material and is provided with a holding device which extends in the direction of the bore to be subsequently inserted and is fixed in the molded body, a simple fixing possibility of the insert in the molded body is achieved.
  • the diameter of the holding device is preferably selected to be smaller in the area encapsulated by the cylinder head than the bore to be drilled later in this area. D a-through is ensured that the holding device in the further machining of the cylinder head is totally drilled out.
  • a such overmolded of the cylinder head liner is insensitive to small tolerance variations with regard to their positioning, as essential for the further use of the cylinder head ylinderkopfschraubenbohrung Z is attached to the casting of the cylinder head.
  • the bore for the cylinder head screw is advantageously made together with other machining operations on the cylinder head.
  • the insert In order to introduce the force to be transmitted from a cylinder head screw to the cylinder head as evenly as possible into the cylinder head, the insert is designed as a disk and the holding device is attached centrally to the disk. This means even with a low eccentricity the later to be fitted hole for the cylinder head bolt ensures an even uniform distribution of pressure with respect to the power transmission from the pulley to the Z-y linder head.
  • the holding device is made in one piece with the disc.
  • the disc together with the holding device can e.g. be cast in one piece from gray cast iron.
  • other fastening variants of the holding device on the pane can also be expedient; depending on the choice of material for the washer and the holding device, a connection can be Welding, gluing, soldering and screwing possible.
  • the holding device is designed as a cylindrical pin. This form of training will be chosen if the holding device extends coaxially along the bore to be made later for the cylinder head screw for fixing in the molded body.
  • the holding device in the shape of a truncated cone, the tapered end of the holding device being fastened to the disk.
  • This design will preferably be selected if the disc is arranged in the cylinder head near an opening such as an intake port, exhaust port or cooling space. In this case, the disc is fastened in the mandrel with the frustoconical holding device.
  • the diameter of the holding device in the section cast by the cylinder head is expediently smaller than the later bore diameter.
  • cylindrical design of the holding device with the cone
  • a truncated design for example, as described above, to form the holding device along the bore to be made later for the cylinder head screw as a cylindrical pin and to have a frustoconical end in the region in which the holding device is fastened in the molded body. A particularly secure attachment in the molded body is thereby achieved.
  • disks 2 and 3 are arranged, which uniformly introduce the tensile forces to be transmitted by the cylinder head screws 4 into the cylinder head 1.
  • the disks 2 and 3 are provided on their sides facing away from the cylinder head screw heads 4a with a larger diameter 2a and 3a than on the sides 2b and 3b facing the cylinder head screw heads 4a.
  • the disks 2 and 3 are provided on the sides 2b and 3b with machined recesses 7 and 8 at right angles to the bores 5 and 6.
  • the opening 10 arranged in the area of a gas exchange channel 11 is after installation of the Cylinder head screws 4 closed by a cover 12.
  • the opening 9 can remain open in the air-cooled cylinder head shown here. If the space 13 which extends between the opening 9 and the disk 2 is to be used as a coolant-flowed space 13 in a liquid-cooled cylinder head 1, the opening 9 is closed in a manner analogous to the opening 10 with a stopper.
  • Figures 2 and 3 show the cylinder head 1 immediately after the casting process.
  • 2 shows an embodiment of the disks 2 'and 3', each with a cast-on cylindrical pin 14 and 15.
  • the two pins 14 and 15 extend along the bores 5 'and 6' to be made later and are fixed in the shaped body (not shown).
  • 3 shows a cylinder head 1 "with cast-in disks 2" and 3 ", wherein in this exemplary embodiment the holding devices are shown as frustoconical holding devices 16 and 17.
  • the frustoconical holding devices 16 and 17 point with their thickening end in the Space 13 "or in the gas exchange channel 11" and are fixed during the casting process in the mold core, not shown.
  • the frustoconically widened ends of the holding devices 16 and 17 have a larger diameter than the bores 5 '' or 6 "to be retrofitted.

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)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP86105411A 1985-04-19 1986-04-18 Méthode pour insérer à la coulée des pièces raffortées dans une culasse Expired - Lifetime EP0199311B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105411T ATE55808T1 (de) 1985-04-19 1986-04-18 Verfahren zum eingiessen von einlagen in einen zylinderkopf.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853514121 DE3514121A1 (de) 1985-04-19 1985-04-19 Zylinderkopf mit im bereich der zylinderkopfschraubenbohrungen angeordneten einlagen
DE3514121 1985-04-19

Publications (3)

Publication Number Publication Date
EP0199311A2 true EP0199311A2 (fr) 1986-10-29
EP0199311A3 EP0199311A3 (en) 1987-12-09
EP0199311B1 EP0199311B1 (fr) 1990-08-22

Family

ID=6268550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105411A Expired - Lifetime EP0199311B1 (fr) 1985-04-19 1986-04-18 Méthode pour insérer à la coulée des pièces raffortées dans une culasse

Country Status (3)

Country Link
EP (1) EP0199311B1 (fr)
AT (1) ATE55808T1 (fr)
DE (2) DE3514121A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2691656A1 (fr) * 1992-05-26 1993-12-03 Renault Procédé de réalisation d'un bras support, notamment pour porte-balai d'essuie-vitre.
EP0939215A3 (fr) * 1998-02-25 2000-06-07 Isuzu Motors Limited Culasse

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE940075C (de) * 1950-10-17 1956-03-08 Kloeckner Humboldt Deutz Ag Luftgekuehlter Zylinderkopf aus Leichtmetall fuer Brennkraftmaschinen
GB942169A (en) * 1960-08-11 1963-11-20 Motoren Werke Mannheim Ag Improvements in or relating to cylinder head arrangements for internal combustion engines
US4100669A (en) * 1975-03-03 1978-07-18 Pemper Steven J Casting process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE940075C (de) * 1950-10-17 1956-03-08 Kloeckner Humboldt Deutz Ag Luftgekuehlter Zylinderkopf aus Leichtmetall fuer Brennkraftmaschinen
GB942169A (en) * 1960-08-11 1963-11-20 Motoren Werke Mannheim Ag Improvements in or relating to cylinder head arrangements for internal combustion engines
US4100669A (en) * 1975-03-03 1978-07-18 Pemper Steven J Casting process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2691656A1 (fr) * 1992-05-26 1993-12-03 Renault Procédé de réalisation d'un bras support, notamment pour porte-balai d'essuie-vitre.
EP0939215A3 (fr) * 1998-02-25 2000-06-07 Isuzu Motors Limited Culasse

Also Published As

Publication number Publication date
EP0199311A3 (en) 1987-12-09
ATE55808T1 (de) 1990-09-15
DE3673546D1 (de) 1990-09-27
DE3514121A1 (de) 1986-10-23
EP0199311B1 (fr) 1990-08-22

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