EP2635391B1 - Cylinder head - Google Patents

Cylinder head Download PDF

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Publication number
EP2635391B1
EP2635391B1 EP11785036.2A EP11785036A EP2635391B1 EP 2635391 B1 EP2635391 B1 EP 2635391B1 EP 11785036 A EP11785036 A EP 11785036A EP 2635391 B1 EP2635391 B1 EP 2635391B1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
mould
cylinder
base material
fire plate
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.)
Active
Application number
EP11785036.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2635391A1 (en
Inventor
Jarkko Ilari Laine
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.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
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 Wartsila Finland Oy filed Critical Wartsila Finland Oy
Publication of EP2635391A1 publication Critical patent/EP2635391A1/en
Application granted granted Critical
Publication of EP2635391B1 publication Critical patent/EP2635391B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • 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
    • B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
    • 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
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal

Definitions

  • the invention relates to a cylinder head of a reciprocating engine.
  • Document FR 2 826 598 A1 discloses a method for manufacturing a cylinder head of an internal combustion engine.
  • Molten metal is poured into a mould containing porous insert with the mould located in a sealed chamber with a pressure above atmospheric and the insert connected to a low-pressure source.
  • the pressure on the mould and the molten metal can be produced by a gas from a source linked to the chamber.
  • DE 101 35 358 A1 discloses production of a component made from a metal-ceramic composite material comprises inserting a ceramic crude material into a mould insert arranged outside of a casting tool, pressing into a pressed mould, inserting into a casting tool, infiltrating the preform with liquid casting material under elevated pressure, and removing the component.
  • the component can be a cylinder head of an internal combustion engine.
  • DE 101 21 928 A1 describes production of locally reinforced light metal parts comprises placing a porous reinforcing element made from a sintered ceramic with a sponge-like structure on the site to be reinforced in a die casting mould; and infiltrating with a melt.
  • FR 2 831 086 A1 discloses casting of metal components including a part formed by a core, incorporates a core fabrication stage in which: the core is produced by moulding a mixture of 96 - 98 % of foundry sand and 4 - 2 % of a resin containing at least 50 % of acrylic copolymer and a peroxide hardener; the core is hardened by contact with a gas containing 90 - 95 % of CO2 and 10 - 5 % of SO2; the core is then placed in a casting mould and the liquid metal is cast into the mould at a pressure of at least 35 MPa.
  • US 6 399 176 discloses a composite wear component produced by casting and consisting of a metal matrix whose working face or faces include inserts which have a very high wear resistance.
  • the inserts consist of a ceramic pad, this ceramic pad consisting of a homogeneous solid solution of 20 to 80% of Al 2 O 3 and 80 to 20% of ZrO 2 , the percentages being expressed by weights of the constituents, and the pad then being impregnated with a liquid metal during the casting.
  • the object of the present invention is to improve the stiffness of the cylinder head.
  • a member made of ceramic foam is inserted into a cylinder head mould, molten cylinder head base material is poured into the mould, the mould and pores of the member are filled with the molten cylinder head base material, and the molten cylinder head base material is solidified in the mould and in the pores of the member.
  • a member made of ceramic foam is arranged in the cylinder head. Pores of the member are filled with cylinder head base material.
  • the cylinder head base material solidifies in the pores of the member, an iron-ceramic composite structure is formed in the member, which increases the stiffness of the cylinder head. This, in turn, reduces the bending of the cylinder head and problems resulting from it. Further, the cylinder head according to the invention can be manufactured easily and cost-effectively.
  • the drawings show a cylinder head 1 of a large reciprocating engine, which can be used as a main or auxiliary engine of a ship or in power plant for the production of heat and/or electricity.
  • the engine is a medium speed, four-stroke engine.
  • the rotational speed of the engine is 300-1200 rpm.
  • the cylinder bore of the engine is typically 20-80 cm.
  • Each cylinder is provided with a separate cylinder head 1.
  • the cylinder head 1 comprises bores 2 for fastening screws, by means of which the cylinder head 1 can be fastened to the cylinder block of the engine. Additionally, the cylinder head 1 comprises at least one inlet port 3 for combustion air and at least one outlet port 4 for exhaust gas. In the embodiment shown in the drawings the cylinder head 1 is provided with two inlet ports 3 and two outlet ports 4. Each port has a valve seat 5 surrounding the port opening.
  • the cylinder head 1 comprises a fire plate 6.
  • the fire plate 6 is a region on the cylinder head, which delimits the combustion space of the cylinder.
  • Base material of the cylinder head 1 is cast iron, typically ductile cast iron.
  • a member 7 made of ceramic foam is arranged in the cylinder head 1.
  • the member 7 is made of open cell ceramic foam.
  • the foam material can be any suitable ceramic carbide or oxide compound such as silicon carbide (SiC), alumina, zirconium oxide (ZrO), zirconium carbide (ZrC) or combinations thereof.
  • the member 7 comprises pores, which are filled with the cylinder head base material.
  • the member 7 is arranged at a fire plate 6 region of the cylinder head.
  • a layer 8 of cylinder head base material is provided between the fire plate 6 surface and the member 7.
  • the thickness of the layer 8 depends on the dimensions, especially the thickness, of the cylinder head. Typically the thickness of the layer 8 is at least 1 cm.
  • the member 7 extends over the entire fire plate 6 region or only part of the fire plate 6 region.
  • Open porosity of the member 7 is 0.3 - 0.7.
  • Open porosity refers to the ratio of volume in which fluid flow is effectively taking place (this excludes dead-end pores or non-connected cavities) to the total volume of porous material.
  • the size of the open pores is 1 mm to 10 mm.
  • the cylinder head 1 can be manufactured as follows.
  • the member 7 made of ceramic foam is inserted into the cylinder head mould at a desired location.
  • the member 7 can be supported to the walls of the mould.
  • Mould cores are also inserted into the mould at desired locations.
  • Prefabricated valve seat rings can be placed in the mould.
  • the mould can be preheated before casting.
  • molten cylinder head base material is poured into the cylinder head mould.
  • the mould and open pores of the member 7 are filled with the molten cylinder head material.
  • the cylinder head base material solidifies in the mould and in the pores of the member 7.
  • an iron-ceramic composite structure is formed in the member 7.
  • the mould is removed from around the solidified cylinder head.
  • mould cores are removed from the cylinder head in a conventional manner.
  • the cylinder head is finished by machining.

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)
EP11785036.2A 2010-11-05 2011-11-02 Cylinder head Active EP2635391B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20106164A FI123254B (sv) 2010-11-05 2010-11-05 Förfarande för framställning av ett cylinderlock och cylinderlock
PCT/FI2011/050964 WO2012059644A1 (en) 2010-11-05 2011-11-02 Method of manufacturing a cylinder head and cylinder head

Publications (2)

Publication Number Publication Date
EP2635391A1 EP2635391A1 (en) 2013-09-11
EP2635391B1 true EP2635391B1 (en) 2015-07-08

Family

ID=43268945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11785036.2A Active EP2635391B1 (en) 2010-11-05 2011-11-02 Cylinder head

Country Status (5)

Country Link
EP (1) EP2635391B1 (sv)
KR (1) KR101729477B1 (sv)
CN (1) CN103237615B (sv)
FI (1) FI123254B (sv)
WO (1) WO2012059644A1 (sv)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5638779A (en) * 1995-08-16 1997-06-17 Northrop Grumman Corporation High-efficiency, low-pollution engine
SK284900B6 (sk) 1996-10-01 2006-02-02 Magotteaux International S. A. Oteruvzdorný diel z kompozitného materiálu
DE10121928A1 (de) 2001-05-05 2002-11-14 Univ Friedrich Alexander Er Verfahren zur Herstellung lokal verstärkter Leichtmetallteile
FR2826598B1 (fr) 2001-07-02 2003-10-24 Peugeot Citroen Automobiles Sa Procede et dispositif de moulage d'une piece metallique comportant un insert poreux et utilisation
DE10135358A1 (de) 2001-07-20 2003-02-06 Daimler Chrysler Ag Verfahren zur Herstellung eines Bauteils mit einem Metall-Keramik-Verbundwerkstoff
FR2831086B1 (fr) 2001-10-19 2004-02-06 Peugeot Citroen Automobiles Sa Procede de fabrication par coulee de pieces metalliques comportant au moins une partie formee par noyautage et utilisation
DE10347510B3 (de) * 2003-10-13 2005-04-28 Federal Mogul Burscheid Gmbh Zylinderlaufbuchse mit einer zwei Schichten umfassenden Außenbeschichtung und Verfahren zu deren Ein- oder Umgießen zu einem Verbundkörper
JP4329809B2 (ja) 2006-11-17 2009-09-09 トヨタ自動車株式会社 シリンダブロック

Also Published As

Publication number Publication date
KR101729477B1 (ko) 2017-04-24
FI20106164A0 (sv) 2010-11-05
FI20106164A (sv) 2012-05-06
CN103237615A (zh) 2013-08-07
EP2635391A1 (en) 2013-09-11
WO2012059644A1 (en) 2012-05-10
FI123254B (sv) 2013-01-15
CN103237615B (zh) 2015-04-22
KR20130123394A (ko) 2013-11-12

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