WO1996035868A1 - Keramisierter leichtmetallkolben für verbrennungsmotoren - Google Patents
Keramisierter leichtmetallkolben für verbrennungsmotoren Download PDFInfo
- Publication number
- WO1996035868A1 WO1996035868A1 PCT/DE1996/000797 DE9600797W WO9635868A1 WO 1996035868 A1 WO1996035868 A1 WO 1996035868A1 DE 9600797 W DE9600797 W DE 9600797W WO 9635868 A1 WO9635868 A1 WO 9635868A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ceramic
- piston
- metal piston
- light metal
- oxide ceramic
- Prior art date
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 or frames
- 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, high-temperature light alloy piston for internal combustion engines.
- EP-A-412 660 describes a heat-insulating piston, in the piston crown area of which i.a. 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 leads to the piston failing.
- DE-PS 36 11 165 describes an integrally cast piston for one
- DE-OS 33 30 554 describes a piston for an internal combustion engine, the Brerin space trough is provided with a ceramic coating applied by thermal spraying or baking, into which a ceramic insert is cast.
- the composite ceramic air core insert / ceramic can loosen at high levels of vibration and temperature and cause the disadvantages already described.
- Ceramics were also applied to metallic pistons by spraying on according to US-A-2,833,264 and DE-OS 34 04 284 or sintering a ceramic on the piston metal according to US-A-2, 657,961.
- This method has the decisive disadvantage that thick coatings (80 to 150 ⁇ m) form cracks due to high thermal gradients and different thermal expansion in connection with high shock loads, and the composite ceramic coating / piston is thereby destabilized at the interface.
- the invention is based on the object of providing a light metal piston, in particular made of aluminum or aluminum alloys, which has a heat-insulating ceramic layer which can withstand high vibrations and high temperatures and thus ensures high ceramic / piston material stability.
- the object is achieved according to the invention by a light metal piston, the surface of which is completely or partially covered with an oxide ceramic conversion layer.
- the piston can be made of aluminum or aluminum alloys (cf. aluminum pocket book, Aluminum Verlag Düsseldorf (1983), p. 1044).
- An oxide ceramic conversion layer is understood here and below to mean an oxide ceramic layer which was 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. In this reaction, part of the light metal is oxidized to a ceramic.
- a crystalline Al 2 0 3 - forms in an aluminum piston
- Double oxides such as NiAl 2 ⁇ 4 and / or MgAl 2 ⁇ 4 and / or CuAl 2 0 4 can also be detected by X-ray analysis, for example when using the piston material AlSil2CuMgNi.
- 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 load changes per minute.
- the piston crown of the light metal piston is completely or partially covered with an oxide ceramic
- the combustion bowl and / or the top land can be coated with an oxide ceramic conversion layer.
- the layer thickness of the oxide ceramic conversion layer is 10 to 150 ⁇ m, preferably 60 to 80 ⁇ m.
- combustion catalysts are embedded in the oxide ceramic conversion layer and are used for the complete combustion of the fuel to form carbon dioxide and 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, nickel 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, nickel and their combinations.
- a light metal piston made of G-AlSiCuNi is clamped in an electrical contacting device in such a way 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 and a final voltage of 220 - 230 V.
- the layer thickness is 60 ⁇ m and is at a
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)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29680358U DE29680358U1 (de) | 1995-05-08 | 1996-05-08 | Keramisierter Leichtmetallkolben für Verbrennungsmotoren |
DE19680303T DE19680303D2 (de) | 1995-05-08 | 1996-05-08 | Keramisierter Leichtmetallkolben für Verbrennungsmotoren |
DE59601018T DE59601018D1 (de) | 1995-05-08 | 1996-05-08 | Keramisierter leichtmetallkolben für verbrennungsmotoren |
EP96914053A EP0839271B1 (de) | 1995-05-08 | 1996-05-08 | Keramisierter leichtmetallkolben für verbrennungsmotoren |
AU57588/96A AU5758896A (en) | 1995-05-08 | 1996-05-08 | Ceramic-coated light-metal piston for internal combustion en gines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19516815A DE19516815A1 (de) | 1995-05-08 | 1995-05-08 | Keramisierter Leichtmetallkolben für Verbrennungsmotoren |
DE19516815.1 | 1995-05-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996035868A1 true WO1996035868A1 (de) | 1996-11-14 |
Family
ID=7761344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/000797 WO1996035868A1 (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) |
Families Citing this family (3)
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 |
JP4438609B2 (ja) † | 2004-11-16 | 2010-03-24 | アイシン精機株式会社 | ピストン |
DE102009012945A1 (de) * | 2009-03-12 | 2010-09-16 | Mtu Aero Engines Gmbh | Verfahren zur Herstellung einer abrasiven Beschichtung und Bauteil für eine Turbomaschine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2626131A1 (de) * | 1976-06-11 | 1977-12-22 | Mahle Gmbh | Harteloxierter leichtmetallkolben |
DE4037393A1 (de) * | 1990-11-22 | 1992-07-30 | Jenoptik Jena Gmbh | Elektrolyt zur erzeugung thermoschockbestaendiger haftfester oxidkeramischer oberflaechenschichten |
EP0609795A1 (de) * | 1993-02-04 | 1994-08-10 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Wärmedämmschicht aus Keramik auf Metallbauteilen und Verfahren zu ihrer Herstellung |
US5385662A (en) * | 1991-11-27 | 1995-01-31 | Electro Chemical Engineering Gmbh | Method of producing oxide ceramic layers on barrier layer-forming metals and articles produced by the method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD275891A1 (de) * | 1988-10-03 | 1990-02-07 | Barkas Werke Veb | Brennkraftmaschine mit einem katalytisch beschichteten brennraum |
DE4242099A1 (de) * | 1992-12-14 | 1994-06-16 | Abb Patent Gmbh | Vorrichtung, insbesondere Gasturbineneinrichtung, mit einer Beschichtung von Einrichtungsteilen |
-
1995
- 1995-05-08 DE DE19516815A patent/DE19516815A1/de not_active Withdrawn
-
1996
- 1996-05-08 WO PCT/DE1996/000797 patent/WO1996035868A1/de active IP Right Grant
- 1996-05-08 DE DE59601018T patent/DE59601018D1/de not_active Expired - Lifetime
- 1996-05-08 DE DE19680303T patent/DE19680303D2/de not_active Expired - Lifetime
- 1996-05-08 AU AU57588/96A patent/AU5758896A/en not_active Abandoned
- 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 EP EP96914053A patent/EP0839271B1/de not_active Expired - Lifetime
- 1996-05-08 DE DE29680358U patent/DE29680358U1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2626131A1 (de) * | 1976-06-11 | 1977-12-22 | Mahle Gmbh | Harteloxierter leichtmetallkolben |
DE4037393A1 (de) * | 1990-11-22 | 1992-07-30 | Jenoptik Jena Gmbh | Elektrolyt zur erzeugung thermoschockbestaendiger haftfester oxidkeramischer oberflaechenschichten |
US5385662A (en) * | 1991-11-27 | 1995-01-31 | Electro Chemical Engineering Gmbh | Method of producing oxide ceramic layers on barrier layer-forming metals and articles produced by the method |
EP0609795A1 (de) * | 1993-02-04 | 1994-08-10 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Wärmedämmschicht aus Keramik auf Metallbauteilen und Verfahren zu ihrer Herstellung |
Also Published As
Publication number | Publication date |
---|---|
DE19516815A1 (de) | 1996-11-14 |
DE19680303D2 (de) | 1997-08-21 |
EP0839271A1 (de) | 1998-05-06 |
DE59601018D1 (de) | 1999-01-28 |
ATE174662T1 (de) | 1999-01-15 |
AU5758896A (en) | 1996-11-29 |
EP0839271B1 (de) | 1998-12-16 |
ES2127637T3 (es) | 1999-04-16 |
DE29680358U1 (de) | 1998-02-12 |
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