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EP0839271B1 - Piston en metal leger ceramise pour moteurs a combustion interne - Google Patents

Piston en metal leger ceramise pour moteurs a combustion interne Download PDF

Info

Publication number
EP0839271B1
EP0839271B1 EP96914053A EP96914053A EP0839271B1 EP 0839271 B1 EP0839271 B1 EP 0839271B1 EP 96914053 A EP96914053 A EP 96914053A EP 96914053 A EP96914053 A EP 96914053A EP 0839271 B1 EP0839271 B1 EP 0839271B1
Authority
EP
European Patent Office
Prior art keywords
ceramic
piston
metal piston
conversion layer
light metal
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
EP96914053A
Other languages
German (de)
English (en)
Other versions
EP0839271A1 (fr
Inventor
Peter Kurze
Helmut Nolte
Dora Banerjee
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.)
Electro Chemical Engineering GmbH
Original Assignee
Electro Chemical Engineering 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 Electro Chemical Engineering GmbH filed Critical Electro Chemical Engineering GmbH
Publication of EP0839271A1 publication Critical patent/EP0839271A1/fr
Application granted granted Critical
Publication of EP0839271B1 publication Critical patent/EP0839271B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02F3/00—Pistons 
    • F02F3/10—Pistons  having surface coverings
    • F02F3/12—Pistons  having surface coverings on piston 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
    • F02F3/00—Pistons 
    • F02F3/10—Pistons  having surface coverings
    • 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
    • F02F7/0085—Materials for constructing engines or their parts
    • F02F7/0087—Ceramic materials
    • 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
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium

Definitions

  • the invention relates to a new type of high vibration and high temperature resilient Light alloy pistons for internal combustion engines.
  • EP-A-412 660 describes a heat-insulating piston, in whose piston crown area a heat-insulating element made of ceramic Material is applied. This has the disadvantage that the ceramic has insufficient adhesion to the metal surface of the piston and loosens under high loads and also causes the piston to fail leads.
  • DE-PS 36 11 165 describes an integrally cast piston for one Internal combustion engine in which a ceramic plate in a cap Iron base is anchored.
  • the production of such a piston is time and expensive.
  • Ceramics were also sprayed on metallic pistons according to US-A-2,833,264 and DE-OS 34 04 284 or sintering a ceramic applied to the piston metal according to US-A-2,657,961.
  • This method has the decisive disadvantage that thick coatings (80 to 150 ⁇ m) due to high thermal gradients and different thermal expansion in Connection with high impact loads form cracks and the bond Ceramic coating / piston is thereby destabilized at the interface.
  • the invention is based on the object, a light metal piston, in particular made of aluminum or aluminum alloys, which is a high vibration and high temperature resistant heat insulating Ceramic layer and thus a high bond stability Ceramics / piston material guaranteed.
  • the object is achieved by a light metal piston, Whole or part of its surface with an oxide ceramic conversion layer is covered.
  • the piston can be made of aluminum or aluminum alloys (see aluminum paperback, Aluminum-Verlag Düsseldorf (1983), p. 1044) be.
  • An oxide ceramic conversion layer is understood here and below to mean an oxide ceramic layer which has been produced by an anodic plasma-chemical reaction in an electrolyte from a light metal surface, preferably from aluminum or an aluminum alloy.
  • a light metal surface preferably from aluminum or an aluminum alloy.
  • Such layers and the processes for their production are known for example from EP-B-280 886, EP-B-545 230 and DE-OS 41 04 847.
  • part of the light metal is oxidized to a ceramic.
  • a crystalline Al 2 O 3 ceramic with a thickness of up to 120 ⁇ m is formed in an aluminum piston.
  • Double oxides such as NiAl 2 O 4 and / or MgAl 2 O 4 and / or CuAl 2 O 4 can also be detected by X-ray analysis, for example when using the piston material AlS12CuMgNi.
  • the elements for the double oxides are the alloy components of the piston material.
  • This conversion layer made of ceramic on the piston has the property that it is very firmly connected to the piston and can withstand high loads such as thermal expansion up to 400 ° C and vibration loads in high cycle fatigue up to 50 x 10 6 load changes per minute.
  • the piston crown of the light metal piston is completely or partially covered with an oxide ceramic conversion layer.
  • the firebox and / or the top land can be provided with an oxide ceramic conversion layer be covered.
  • the layer thickness is the oxide ceramic conversion layer 10 to 150 microns, preferably 60 up to 80 ⁇ m.
  • combustion catalysts in the oxide ceramic conversion layer stored for the complete combustion of the fuel to carbon dioxide and serve water.
  • Such catalysts are, for example, metals such as precious metals e.g. Platinum, Palladium, rhodium, ruthenium or oxidic compounds made of non-precious metals such as oxides of copper, chromium, manganese, iron, cobalt, Nickels and their combinations.
  • precious metals e.g. Platinum, Palladium, rhodium, ruthenium or oxidic compounds made of non-precious metals such as oxides of copper, chromium, manganese, iron, cobalt, Nickels and their combinations.
  • a light metal piston made of G-AlSiCuNi is clamped in an electrical contacting device so that only the piston head comes into contact with the electrolyte.
  • the anodic plasma chemical reaction of the piston crown takes place at current densities of 5 A / dm 2 and a final voltage of 220 - 230 V.
  • the layer thickness is 60 ⁇ m and is achieved with a coating time of 45 min.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (7)

  1. Piston en métal léger, caractérisé en ce que sa surface est revêtue en totalité ou en partie d'une couche de conversion en céramique oxydée.
  2. Piston en métal léger suivant la revendication 1, caractérisé en ce que la tête de piston est revêtue en totalité ou en partie d'une couche de conversion de céramique oxydée.
  3. Piston en métal léger suivant la revendication 1 ou 2, caractérisé en ce que la chambre d'explosion est revêtue d'une couche de conversion en céramique oxydée.
  4. Piston en métal léger suivant l'une des revendications 1 à 3, caractérisé en ce que la zone de feu est elle aussi revêtue d'une couche de conversion en céramique oxydée.
  5. Piston en métal léger suivant l'une des revendications 1 à 4, caractérisé en ce que l'épaisseur de la couche de conversion en céramique oxydée s'élève à une valeur de 10 à 150 µm.
  6. Piston en métal léger suivant l'une des revendications 1 à 5, caractérisé en ce que l'épaisseur de la couche de conversion en céramique oxydée s'élève à une valeur de 60 à 80 µm.
  7. Piston en métal léger suivant l'une des revendications 1 à 6, caractérisé en ce que des catalyseurs de combustion sont incorporés à la couche de conversion en céramique oxydée.
EP96914053A 1995-05-08 1996-05-08 Piston en metal leger ceramise pour moteurs a combustion interne Expired - Lifetime EP0839271B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19516815A DE19516815A1 (de) 1995-05-08 1995-05-08 Keramisierter Leichtmetallkolben für Verbrennungsmotoren
DE19516815 1995-05-08
PCT/DE1996/000797 WO1996035868A1 (fr) 1995-05-08 1996-05-08 Piston en metal leger ceramise pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP0839271A1 EP0839271A1 (fr) 1998-05-06
EP0839271B1 true EP0839271B1 (fr) 1998-12-16

Family

ID=7761344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96914053A Expired - Lifetime EP0839271B1 (fr) 1995-05-08 1996-05-08 Piston en metal leger ceramise pour moteurs a combustion interne

Country Status (6)

Country Link
EP (1) EP0839271B1 (fr)
AT (1) ATE174662T1 (fr)
AU (1) AU5758896A (fr)
DE (4) DE19516815A1 (fr)
ES (1) ES2127637T3 (fr)
WO (1) WO1996035868A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10320979B4 (de) * 2003-05-09 2006-01-05 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor und Verfahren zur Beschichtung eines Kolbens für einen Verbrennungsmotor
EP1657326B2 (fr) † 2004-11-16 2017-10-11 Aisin Seiki Kabushiki Kaisha Piston en aluminium au moins partiellement couvert d'un film d'alumine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009012945A1 (de) * 2009-03-12 2010-09-16 Mtu Aero Engines Gmbh Verfahren zur Herstellung einer abrasiven Beschichtung und Bauteil für eine Turbomaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2626131C2 (de) * 1976-06-11 1982-06-03 Mahle Gmbh, 7000 Stuttgart Harteloxierter Leichtmetallkolben für Verbrennungsmotoren
DD275891A1 (de) * 1988-10-03 1990-02-07 Barkas Werke Veb Brennkraftmaschine mit einem katalytisch beschichteten brennraum
DE4037392C2 (de) * 1990-11-22 1997-07-31 Physikalisch Tech Studien Gmbh Elektrolyt und Verfahren zur Erzeugung weißer oxidkeramischer Oberflächenschichten sowie Verwendung des Elektrolyten
DE4139006C3 (de) * 1991-11-27 2003-07-10 Electro Chem Eng Gmbh Verfahren zur Erzeugung von Oxidkeramikschichten auf sperrschichtbildenden Metallen und auf diese Weise erzeugte Gegenstände aus Aluminium, Magnesium, Titan oder deren Legierungen mit einer Oxidkeramikschicht
DE4242099A1 (de) * 1992-12-14 1994-06-16 Abb Patent Gmbh Vorrichtung, insbesondere Gasturbineneinrichtung, mit einer Beschichtung von Einrichtungsteilen
DE4303135C2 (de) * 1993-02-04 1997-06-05 Mtu Muenchen Gmbh Wärmedämmschicht aus Keramik auf Metallbauteilen und Verfahren zu ihrer Herstellung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10320979B4 (de) * 2003-05-09 2006-01-05 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor und Verfahren zur Beschichtung eines Kolbens für einen Verbrennungsmotor
EP1657326B2 (fr) † 2004-11-16 2017-10-11 Aisin Seiki Kabushiki Kaisha Piston en aluminium au moins partiellement couvert d'un film d'alumine

Also Published As

Publication number Publication date
DE19680303D2 (de) 1997-08-21
DE29680358U1 (de) 1998-02-12
WO1996035868A1 (fr) 1996-11-14
AU5758896A (en) 1996-11-29
EP0839271A1 (fr) 1998-05-06
DE19516815A1 (de) 1996-11-14
DE59601018D1 (de) 1999-01-28
ATE174662T1 (de) 1999-01-15
ES2127637T3 (es) 1999-04-16

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