EP0525540A1 - Cylinder liner unit for use in an internal combustion engine - Google Patents

Cylinder liner unit for use in an internal combustion engine Download PDF

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Publication number
EP0525540A1
EP0525540A1 EP92112215A EP92112215A EP0525540A1 EP 0525540 A1 EP0525540 A1 EP 0525540A1 EP 92112215 A EP92112215 A EP 92112215A EP 92112215 A EP92112215 A EP 92112215A EP 0525540 A1 EP0525540 A1 EP 0525540A1
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Prior art keywords
cylinder liner
cast iron
internal combustion
combustion engine
steadite
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EP92112215A
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German (de)
French (fr)
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EP0525540B1 (en
Inventor
Frithjof Bünning
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MAN B&W Diesel GmbH
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MAN B&W Diesel GmbH
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Priority to DE9218455U priority Critical patent/DE9218455U1/en
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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 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/04—Cylinders; Cylinder heads  having cooling means for air cooling
    • F02F1/06—Shape or arrangement of cooling fins; Finned cylinders
    • F02F1/08—Shape or arrangement of cooling fins; Finned cylinders running-liner and cooling-part of cylinder being different parts or of different material
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/04—Cast-iron alloys containing spheroidal graphite
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F2007/0097—Casings, e.g. crankcases or frames for large diesel engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/04—Phosphor

Definitions

  • the invention relates to a cylinder liner for an internal combustion engine, in particular for a large diesel engine.
  • Cylinder liners of internal combustion engines which are shaped by casting, generally consist of cast iron with lamellar graphite.
  • typical gray cast iron alloys for cylinder liners can be found in DE-AS 2 146 153.
  • the gray cast iron is characterized by its good castability and a low price. Its mechanical and physical properties are particularly dependent on the structure of the structure.
  • the structure consists of a metallic matrix with lamellar graphite inclusions. These break the structural cohesion less, the finer and shorter they are.
  • the graphite formation can be refined by modification in a known manner. Appropriate germ introduction (inoculation) and / or increased cooling rate can be used to achieve fine lamellae in high-quality cast iron with fine-streaked pearlite.
  • a cylinder liner made of this gray cast iron, alloyed with phosphorus and / or boron, has on its surface due to its advantageous heterogeneous structure and the reticulated arrangement of very hard steadite / cementite caused by phosphorus and / or boron addition, which keeps the lubricating film on the surface , very favorable sliding properties, so that the piston rings of the piston can run well in the cylinder liner.
  • the cylinder liner is cast from a pearlitic cast iron with spheroidal graphite, with its structure similar to today's customary, correspondingly alloyed bushings made from cast iron with flake graphite, clearly defined, network-like, evenly distributed cementite / steadite parts, which have a surface area between 3 and 8%.
  • the spherical shape of the graphite increases the tensile strength and the impact strength of the structure of the cylinder liner.
  • the surface of the cylinder liner - as with appropriately alloyed cast iron with lamellar graphite - has a microscopic, net-like relief that ensures good adhesion for a lubricating film. This ensures good running behavior of the piston rings on the cylinder liner surface.
  • the boron, phosphorus, vanadium content is to be set within the above-mentioned limits in such a way that the desired properties for the cast part are achieved and special properties are optimized according to the specific need.
  • phosphorus increases wear resistance, but it also has an embrittling effect, but of the three alloying elements boron, phosphorus or vanadium provides the best network-like distribution of the cementite / steadite proportions.
  • Boron best promotes the wear resistance of the structure, but provides a not quite as good network-like distribution of the cementite / steadite parts as phosphorus, while vanadium supports the tensile and wear resistance, but hardly causes a network-like distribution of the cementite / steadite parts and thus as additional alloying element would be unsuitable without boron and / or phosphorus.
  • a comparatively inexpensive cylinder liner to be produced in a casting process which not only meets the demands placed on it in terms of tensile and wear resistance, but at the same time has the surface property required to achieve a sufficient lubricating effect.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

In a cylinder liner for use in an internal combustion engine, especially for a large diesel engine, and cast from perlitic cast iron with spheroidal graphite as the basic alloy, the microstructure of the cast iron also comprises clearly delimited cementite/steadite proportions, which are uniformly distributed like a network and cover an area fraction of from 3 to 8%. The basic alloy additionally has admixed to it boron at from 0.01 to 0.03 and/or phosphorus at from 0.2 to 0.4 and - if required - vanadium at from 0.1 to 0.3 per cent by weight as alloy elements.

Description

Die Erfindung betrifft eine Zylinderlaufbuchse für eine Brennkraftmaschine, insbesondere für einen Großdieselmotor.The invention relates to a cylinder liner for an internal combustion engine, in particular for a large diesel engine.

Die Weiterentwicklung der Brennkraftmaschine, insbesondere der Großdieselmotoren zu immer höheren spezifischen Leistungen hin, erfordert höhere Belastbarkeit auch der Zylinderbuchsen. Die Zylinderlaufbuchse unterliegt beim Betrieb der Brennkraftmaschine insbesondere in ihrem oberen Bereich, dem Zünd-und Explosionsbereich, durch hohen Druck und hohe Temperatur einem hohen Verschleiß und einer hohen Bruchgefahr.The further development of the internal combustion engine, in particular the large diesel engines, towards ever higher specific outputs, also requires a higher load capacity of the cylinder liners. During operation of the internal combustion engine, the cylinder liner is subject to high wear and a high risk of breakage, particularly in its upper region, the ignition and explosion region, due to high pressure and high temperature.

Zylinderlaufbuchsen von Brennkraftmaschinen, deren Formgebung durch Gießen erfolgt, bestehen im allgemeinen aus Gußeisen mit Lamellengraphit. Zum Beispiel sind typische Graugußeisen-Legierungen für Zylinderlaufbuchsen der DE-AS 2 146 153 zu entnehmen. Der Grauguß zeichnet sich durch seine gute Gießbarkeit und einen niedrigen Preis aus. Seine mechanischen und physikalischen Eigenschaften sind besonders deutlich vom Gefügeaufbau abhängig. Das Gefüge besteht aus metallischer Grundmasse mit lamellenförmigen Graphiteinlagerungen. Diese unterbrechen den Gefügezusammenhalt umso weniger, je feiner und kürzer sie sind. Durch Modifizierung in bekannter Weise kann die Graphitausbildung verfeinert werden. Durch eine entsprechende Keimeinbringung (Impfung) und/oder erhöhte Abkühlungsgeschwindigkeit können feine Lamellen in einem hochwertigen Gußeisen mit feinstreifigem Perlit erzielt werden. Eine Zylinderlaufbuchse aus diesem Grauguß, mit Phosphor und/oder Bor legiert, besitzt an ihrer Oberfläche aufgrund ihres vorteilhaften heterogenen Gefügebaus und der durch Phosphor und/oder Bor-Zusatz hervorgerufenen netzförmigen Anordnung von sehr hartem Steadit/Zementit, die den Schmierfilm auf der Oberfläche hält, sehr günstige Gleiteigenschaften, so daß die Kolbenringe des Kolbens in der Zylinderlaufbuchse gut laufen können.Cylinder liners of internal combustion engines, which are shaped by casting, generally consist of cast iron with lamellar graphite. For example, typical gray cast iron alloys for cylinder liners can be found in DE-AS 2 146 153. The gray cast iron is characterized by its good castability and a low price. Its mechanical and physical properties are particularly dependent on the structure of the structure. The structure consists of a metallic matrix with lamellar graphite inclusions. These break the structural cohesion less, the finer and shorter they are. The graphite formation can be refined by modification in a known manner. Appropriate germ introduction (inoculation) and / or increased cooling rate can be used to achieve fine lamellae in high-quality cast iron with fine-streaked pearlite. A cylinder liner made of this gray cast iron, alloyed with phosphorus and / or boron, has on its surface due to its advantageous heterogeneous structure and the reticulated arrangement of very hard steadite / cementite caused by phosphorus and / or boron addition, which keeps the lubricating film on the surface , very favorable sliding properties, so that the piston rings of the piston can run well in the cylinder liner.

Jedoch ist die Grenzbelastung für eine Zylinderlaufbuchse aus Gußeisen mit Lamellengraphit als Basislegierung bei den leistungsstärksten Brennkraftmaschinen bereits überschritten. Deshalb schlägt die nicht vorveröffentlichte ältere deutsche Anmeldung P 41 09 308.9-24 eine spezifische Konstruktion vor, bei der ein vergleichsweise voluminöser Stahlring, der die Funktion eines Stützringes hat, an seiner Innenoberfläche mit einer üblichen Graugußlaufschicht versehen wird und löst somit die Aufgabe, die Bruchfestigkeit einer Zylinderlaufbuchse zu erhöhen, ohne das Laufverhalten der Kolbenringe auf der Zylinderoberfläche gegenüber den mit Grauguß mit Lamellengraphit erzielbaren Laufeigenschaften zu verschlechtern. Diese Zylinderlaufbuchse ist jedoch zu teuer und zu aufwendig herzustellen.However, the limit load for a cylinder liner made of cast iron with lamellar graphite as the base alloy for the most powerful internal combustion engines has already been exceeded. Therefore, the unpublished older German application P 41 09 308.9-24 proposes a specific construction in which a comparatively voluminous steel ring, which has the function of a support ring, is provided on its inner surface with a conventional gray cast iron running layer and thus solves the task of breaking strength of a cylinder liner without increasing the running behavior of the piston rings on the cylinder surface compared to the running properties that can be achieved with gray cast iron with lamellar graphite. However, this cylinder liner is too expensive and too expensive to manufacture.

Aufgabe der vorliegenden Erfindung ist es nun, eine kostengünstige, in einem Gießvorgang herstellbare Zylinderlaufbuchse für eine Brennkraftmaschine mit einer höheren Zugfestigkeit und Dehnung, als der des üblicherweise verwendeten Graugußeisens zu schaffen, ohne das Laufverhalten der Kolbenringe auf der Zylinderlaufbuchsenoberfläche und die Verschleißbeständigkeit gegenüber den mit Gußeisen mit Lamellengraphit erzielbaren Lauf- und Verschleißeigenschaften zu verschlechtern.It is an object of the present invention to provide an inexpensive cylinder liner that can be produced in a casting process for an internal combustion engine with a higher tensile strength and elongation than that of the gray cast iron usually used, without the running behavior of the piston rings on the cylinder liner surface and the wear resistance compared to that with cast iron deteriorate running and wear properties that can be achieved with lamellar graphite.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Zylinderlaufbuchse aus einem perlitischen Gußeisen mit Kugelgraphit gegossen ist, wobei Ihr Gefüge ähnlich wie bei heute üblichen, entsprechend legierten Buchsen aus Gußeisen mit Lamellengraphit, klar eingegrenzte, netzförmig gleichmäßig verteilte Zementit-/Steaditanteile, die einen Flächenanteil zwischen 3 bis 8 % einnehmen, aufweist.This object is achieved according to the invention in that the cylinder liner is cast from a pearlitic cast iron with spheroidal graphite, with its structure similar to today's customary, correspondingly alloyed bushings made from cast iron with flake graphite, clearly defined, network-like, evenly distributed cementite / steadite parts, which have a surface area between 3 and 8%.

Die speziellen Eigenschaften des Gefüges sind mittels beigefügter Legierungselemente erzielt worden. So ist die Ausbildung des Kugelgraphits in bekannter Weise durch Zusatz von Mg oder Mg plus Ce bewirkt worden. Die Förderung der Zementit-/Steaditausscheidung in der erstarrenden Schmelze auf Kosten des Graphitanteils und ihre räumliche, klar eingegrenzte, netzförmige Anordnung, sowie ihr Flächenanteil durch Zusatz von geringen Mengen an Bor und/oder Phosphor und - bei Bedarf - an Vanadium zum perlitischen Gußeisen mit Kugelgraphit und den Analysegrenzen

Figure imgb0001
erreicht worden und zwar in folgenden variablen Gewichtsprozentanteilen:
Figure imgb0002
 The special properties of the structure have been achieved by means of the added alloying elements. The formation of spheroidal graphite has been effected in a known manner by adding Mg or Mg plus Ce. The promotion of the cementite / steadite excretion in the solidifying melt at the expense of the graphite portion and its spatial, clearly delimited, network-like arrangement, as well as its area portion by adding small amounts of boron and / or phosphorus and - if necessary - of vanadium to the pearlitic cast iron Spheroidal graphite and the analysis limits
Figure imgb0001
 achieved in the following variable percentages by weight:
Figure imgb0002

Durch die kugelige Ausbildung des Graphits wird die Zugfestigkeit und die Schlagfähigkeit des Gefüges der Zylinderlaufbuchse erhöht.The spherical shape of the graphite increases the tensile strength and the impact strength of the structure of the cylinder liner.

Durch die spezielle räumliche Anordnung der klar eingegrenzten Zementit-/Steaditanteile im Gefüge weist die Oberfläche der Zylinderlaufbuchse - wie bei entsprechend legiertem Gußeisen mit Lamellengraphit - ein mikroskopisch feines, netzförmiges Relief auf, das eine gute Haftung für einen Schmierfilm gewährleistet. Damit ist ein gutes Laufverhalten der Kolbenringe auf der Zylinderlaufbuchsenoberfläche sichergestellt.Due to the special spatial arrangement of the clearly defined cementite / steadite components in the structure, the surface of the cylinder liner - as with appropriately alloyed cast iron with lamellar graphite - has a microscopic, net-like relief that ensures good adhesion for a lubricating film. This ensures good running behavior of the piston rings on the cylinder liner surface.

Der Bor-, Phosphor-, Vanadium-Gehalt ist in den oben genannten Grenzen so einzustellen, daß die gewünschten Eigenschaften für das Gußteil erreicht werden und spezielle Eigenschaften je nach dem speziellen Bedarfsfall optimiert werden. Zum Beispiel steigert Phosphor die Verschleißfestigkeit, wirkt allerdings auch versprödend, liefert jedoch von den drei Legierungselementen Bor, Phosphor oder Vanadium die beste netzförmige Verteilung der Zementit-/ Steaditanteile. Bor fördert am besten die Verschleißfestigkeit des Gefüges, liefert allerdings eine nicht ganz so gute netzförmige Verteilung der Zementit-/Steaditanteile wie Phosphor, während Vanadium unterstützend für die Zug- und Verschleißfestigkeit wirkt, allerdings kaum netzartige Verteilung der Zementit-/Steaditanteile bewirkt und somit als zusätzliches Legierungselement ohne Bor und/oder Phosphor wenig tauglich wäre.The boron, phosphorus, vanadium content is to be set within the above-mentioned limits in such a way that the desired properties for the cast part are achieved and special properties are optimized according to the specific need. For example, phosphorus increases wear resistance, but it also has an embrittling effect, but of the three alloying elements boron, phosphorus or vanadium provides the best network-like distribution of the cementite / steadite proportions. Boron best promotes the wear resistance of the structure, but provides a not quite as good network-like distribution of the cementite / steadite parts as phosphorus, while vanadium supports the tensile and wear resistance, but hardly causes a network-like distribution of the cementite / steadite parts and thus as additional alloying element would be unsuitable without boron and / or phosphorus.

Somit ist eine vergleichsweise günstige, in einem Gießvorgang herzustellende Zylinderlaufbuchse angegeben worden, die nicht nur den an sie gestellten Forderungen in Bezug auf die Zug- und Verschleißfestigkeit genügt, sondern gleichzeitig die zur Erzielung einer ausreichenden Schmierwirkung erforderliche Oberflächeneigenschaft aufweist.Thus, a comparatively inexpensive cylinder liner to be produced in a casting process has been specified which not only meets the demands placed on it in terms of tensile and wear resistance, but at the same time has the surface property required to achieve a sufficient lubricating effect.

Claims (2)

1. Zylinderlaufbuchse für eine Brennkraftmaschine, insbesondere für einen Großdieselmotor, dadurch gekennzeichnet, daß diese aus perlitischem Gußeisen mit Kugelgraphit und den Analysegrenzen
Figure imgb0003
als Basislegierung gegossen ist, wobei der Basislegierung Zusätze von
Figure imgb0004
als Legierungselemente beigegeben sind und das Gefüge des Gußeisens neben den kugelförmigen Graphiteinlagerungen auch klar eingegrenzte, netzförmig gleichmäßig verteilte Zementit-/Steaditanteile, die einen Flächenanteil von 3 bis 8 % einnehmen, aufweist.1. Cylinder liner for an internal combustion engine, in particular for a large diesel engine, characterized in that it is made of pearlitic cast iron with nodular graphite and the analysis limits
Figure imgb0003
 is cast as a base alloy, the addition of
Figure imgb0004
 are added as alloying elements and the structure of the cast iron, in addition to the spherical graphite inclusions, also has clearly defined, network-like, evenly distributed cementite / steadite fractions, which take up an area fraction of 3 to 8%. 2. Zylinderlaufbuchse für eine Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß das Gefüge des Gußeisens zusätzlich einen Zusatz von Vanadium mit 0,1 bis 0,3 Gewichtsprozent als Legierungselement beinhaltet.2. Cylinder liner for an internal combustion engine according to claim 1, characterized in that the structure of the cast iron additionally contains an addition of vanadium with 0.1 to 0.3 percent by weight as an alloying element.
EP92112215A 1991-07-27 1992-07-17 Cylinder liner unit for use in an internal combustion engine Expired - Lifetime EP0525540B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9218455U DE9218455U1 (en) 1991-07-27 1992-07-17 Cylinder liner for an internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4124996 1991-07-27
DE4124996 1991-07-27

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EP0525540A1 true EP0525540A1 (en) 1993-02-03
EP0525540B1 EP0525540B1 (en) 1994-12-28

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JP (1) JP2962621B2 (en)
DE (1) DE59201079D1 (en)
FI (1) FI101816B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994010354A1 (en) * 1992-10-26 1994-05-11 Cofap - Companhia Fabricadora De Peças Gray cast iron
FR2726035A1 (en) * 1994-10-25 1996-04-26 Man B & W Diesel Ag CYLINDER SHIRT FOR AN INTERNAL COMBUSTION ENGINE
EP0872567A1 (en) * 1997-04-16 1998-10-21 Wärtsilä NSD Schweiz AG Cast iron and cylinder liner produced from it
DE19780253C2 (en) * 1996-02-28 2002-10-02 Riken Tokio Tokyo Kk Cast iron and piston ring
EP1270747A2 (en) * 2001-06-20 2003-01-02 Georg Fischer Fahrzeugtechnik AG Spheroidal graphite cast iron with addition of boron
WO2006056334A1 (en) * 2004-11-22 2006-06-01 Georg Fischer Automotive Ag Spheroidal cast alloy and method for producing cast parts from said spheroidal cast alloy
DE102007041519A1 (en) * 2007-08-31 2009-03-05 Mahle International Gmbh Cylinder liner and method for its production
EP2392812A1 (en) 2010-06-01 2011-12-07 Wärtsilä Schweiz AG Low-wear stroke piston combustion engine
WO2017160782A1 (en) * 2016-03-15 2017-09-21 Federal-Mogul Llc High strength cast iron for cylinder liners

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9581103B1 (en) 2014-01-28 2017-02-28 ZYNP International Corp. Cylinder liner and method of forming the same
KR101790051B1 (en) 2016-03-09 2017-10-30 삼영기계(주) spheroidal graphite cast iron alloy for manufacturing piston ring
KR101677169B1 (en) * 2016-03-09 2016-11-17 삼영기계 (주) piston ring improved abrasion-proof

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE2146153A1 (en) * 1971-09-15 1973-03-29 Ramsey Corp Piston cylinder liner sleeve with hard facing bands

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JPS5713143A (en) * 1980-06-30 1982-01-23 Riken Corp Tough spheroidal graphite cast iron with superior wear resistance
JPH0313298A (en) * 1989-06-09 1991-01-22 Tohoku Rubber Kk Rubber mold for powder molding

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Publication number Priority date Publication date Assignee Title
DE2146153A1 (en) * 1971-09-15 1973-03-29 Ramsey Corp Piston cylinder liner sleeve with hard facing bands

Non-Patent Citations (2)

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Title
CHEMICAL ABSTRACTS, Band 79, Nr. 14, 8. Oktober 1973, Columbus, Ohio, USA HIROOKA, TOSHIO et al. "Friction and wear charac- teristics of some special cast irons" Seite 243, Zusammenfassung- -Nr. 82 323a *
CHEMICAL ABSTRACTS, Band 89, Nr. 24, 11 Dezember 1978, Columbus, Ohio, USA YANAGISAWA, OSAMU et al. "Formation of plate - like cementit in steadite" Seite 237, Zusammenfassung- -Nr. 201 523j *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994010354A1 (en) * 1992-10-26 1994-05-11 Cofap - Companhia Fabricadora De Peças Gray cast iron
FR2726035A1 (en) * 1994-10-25 1996-04-26 Man B & W Diesel Ag CYLINDER SHIRT FOR AN INTERNAL COMBUSTION ENGINE
DE4438073A1 (en) * 1994-10-25 1996-05-02 Man B & W Diesel Ag Cylinder liner for combustion machines, esp. large diesel engines
DE19780253C2 (en) * 1996-02-28 2002-10-02 Riken Tokio Tokyo Kk Cast iron and piston ring
EP0872567A1 (en) * 1997-04-16 1998-10-21 Wärtsilä NSD Schweiz AG Cast iron and cylinder liner produced from it
EP1270747A3 (en) * 2001-06-20 2004-01-02 Georg Fischer Fahrzeugtechnik AG Spheroidal graphite cast iron with addition of boron
EP1270747A2 (en) * 2001-06-20 2003-01-02 Georg Fischer Fahrzeugtechnik AG Spheroidal graphite cast iron with addition of boron
WO2006056334A1 (en) * 2004-11-22 2006-06-01 Georg Fischer Automotive Ag Spheroidal cast alloy and method for producing cast parts from said spheroidal cast alloy
US8771589B2 (en) 2004-11-22 2014-07-08 Georg Fischer Gmbh Spheroidal cast iron alloy parts and method for producing thereof
DE102007041519A1 (en) * 2007-08-31 2009-03-05 Mahle International Gmbh Cylinder liner and method for its production
US8394207B2 (en) 2007-08-31 2013-03-12 Mahle International Gmbh Cylinder jacket and method for producing the same
EP2392812A1 (en) 2010-06-01 2011-12-07 Wärtsilä Schweiz AG Low-wear stroke piston combustion engine
WO2017160782A1 (en) * 2016-03-15 2017-09-21 Federal-Mogul Llc High strength cast iron for cylinder liners
US9873928B2 (en) 2016-03-15 2018-01-23 Federal-Mogul High strength cast iron for cylinder liners

Also Published As

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DE59201079D1 (en) 1995-02-09
FI923174A (en) 1993-01-28
JPH05214482A (en) 1993-08-24
FI923174A0 (en) 1992-07-09
JP2962621B2 (en) 1999-10-12
FI101816B1 (en) 1998-08-31
EP0525540B1 (en) 1994-12-28
FI101816B (en) 1998-08-31

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