EP0839271B1 - Keramisierter leichtmetallkolben für verbrennungsmotoren - Google Patents
Keramisierter leichtmetallkolben für verbrennungsmotoren Download PDFInfo
- 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
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)
Description
Claims (7)
- Leichtmetallkolben, dadurch gekennzeichnet, daß seine Oberfläche ganz oder teilweise mit einer Oxidkeramik-Konversionsschicht überzogen ist.
- Leichtmetallkolben nach Anspruch 1, dadurch gekennzeichnet, daß der Kolbenboden ganz oder teilweise mit einer Oxidkeramik-Konversionsschicht überzogen ist.
- Leichtmetallkolben nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Brennmulde mit einer Oxidkeramik-Konversionsschicht überzogen ist.
- Leichtmetallkolben nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß auch der Feuersteg mit einer Oxidkeramik-Konversionsschicht überzogen ist.
- Leichtmetallkolben nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Schichtdicke der Oxidkeramik-Konversionsschicht 10 bis 150 µm beträgt.
- Leichtmetallkolben nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Schichtdicke der Oxidkeramik-Konversionsschicht 60 bis 80 µm beträgt.
- Leichtmetallkolben nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß in die Oxidkeramik-Konversionsschicht Verbrennungskatalysatoren eingelagert sind.
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 (de) | 1995-05-08 | 1996-05-08 | Keramisierter leichtmetallkolben für verbrennungsmotoren |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0839271A1 EP0839271A1 (de) | 1998-05-06 |
| EP0839271B1 true EP0839271B1 (de) | 1998-12-16 |
Family
ID=7761344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96914053A Expired - Lifetime EP0839271B1 (de) | 1995-05-08 | 1996-05-08 | Keramisierter leichtmetallkolben für verbrennungsmotoren |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0839271B1 (de) |
| AT (1) | ATE174662T1 (de) |
| AU (1) | AU5758896A (de) |
| DE (4) | DE19516815A1 (de) |
| ES (1) | ES2127637T3 (de) |
| WO (1) | WO1996035868A1 (de) |
Cited By (2)
| 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 (de) † | 2004-11-16 | 2017-10-11 | Aisin Seiki Kabushiki Kaisha | Aluminium-Kolben, der zumindest teilweise mit einem Aluminiumoxidfilm bedeckt ist |
Families Citing this family (1)
| 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)
| 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 |
-
1995
- 1995-05-08 DE DE19516815A patent/DE19516815A1/de not_active Withdrawn
-
1996
- 1996-05-08 DE DE59601018T patent/DE59601018D1/de not_active Expired - Lifetime
- 1996-05-08 AT AT96914053T patent/ATE174662T1/de not_active IP Right Cessation
- 1996-05-08 ES ES96914053T patent/ES2127637T3/es not_active Expired - Lifetime
- 1996-05-08 WO PCT/DE1996/000797 patent/WO1996035868A1/de not_active Ceased
- 1996-05-08 DE DE19680303T patent/DE19680303D2/de not_active Expired - Lifetime
- 1996-05-08 DE DE29680358U patent/DE29680358U1/de not_active Expired - Lifetime
- 1996-05-08 EP EP96914053A patent/EP0839271B1/de not_active Expired - Lifetime
- 1996-05-08 AU AU57588/96A patent/AU5758896A/en not_active Abandoned
Cited By (2)
| 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 (de) † | 2004-11-16 | 2017-10-11 | Aisin Seiki Kabushiki Kaisha | Aluminium-Kolben, der zumindest teilweise mit einem Aluminiumoxidfilm bedeckt ist |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19680303D2 (de) | 1997-08-21 |
| DE29680358U1 (de) | 1998-02-12 |
| WO1996035868A1 (de) | 1996-11-14 |
| AU5758896A (en) | 1996-11-29 |
| EP0839271A1 (de) | 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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