DE202011107284U1 - WANKEL - engine piston heat insulation coating - Google Patents

WANKEL - engine piston heat insulation coating Download PDF

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Publication number
DE202011107284U1
DE202011107284U1 DE202011107284U DE202011107284U DE202011107284U1 DE 202011107284 U1 DE202011107284 U1 DE 202011107284U1 DE 202011107284 U DE202011107284 U DE 202011107284U DE 202011107284 U DE202011107284 U DE 202011107284U DE 202011107284 U1 DE202011107284 U1 DE 202011107284U1
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Prior art keywords
wankel
thermal barrier
piston
insulation coating
heat insulation
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Expired - Lifetime
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DE202011107284U
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German (de)
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Publication of DE202011107284U1 publication Critical patent/DE202011107284U1/en
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Classifications

    • 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
    • F02B55/00—Internal-combustion aspects of rotary pistons; Outer members for co-operation with rotary pistons
    • F02B55/02—Pistons
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
    • C23C4/11—Oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/22—Rotary-piston machines or engines of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/06—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0865—Oxide ceramics
    • F05C2203/0895—Zirconium oxide
    • 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
    • F05C2251/00—Material properties
    • F05C2251/04—Thermal properties
    • F05C2251/048—Heat transfer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

Aufbringung einer Wärmedämmbeschichtung auf die Kolbenflanken von WANKEL Motorkolben, dadurch gekennzeichnet, dass die Beschichtung mit einem Flammspritzverfahren aufgebracht wird und aus einem keramischen Material besteht.Application of a thermal insulation coating to the piston flanks of WANKEL engine pistons, characterized in that the coating is applied using a flame spraying process and consists of a ceramic material.

Description

Zusamenfassung:Together version:

Die Anmeldung betrifft die Beschichtung der Brennraumoberflächen von WANKEL Motorkolben mit einer Wärmedämmschicht zur Verminderung der Kolben/Exzenterwellenlagertemperatur zum Zwecke der Verbesserung der Motorstandzeit und der Verbesserung des motorischen Wirkungsgrades sowie der möglichen Verwendung von Kolben aus Leichtmetallwerkstoffen.The application relates to coating the combustion chamber surfaces of WANKEL engine pistons with a thermal barrier coating to reduce the piston / eccentric shaft bearing temperature for the purpose of improving engine life and improving engine efficiency, as well as the potential use of light alloy pistons.

Es ist bekannt zur Verbesserung des motorischen Wirkungsgrades die verbrennungsgasberührenden Flächen von OTTO- und DIESEL- Motoren mit Wärmedämmbeschichtungen auszurüsten. Dies sind z. B. Kolbenböden, Zylinderköpfe, Ventilschäfte, Turbolader und Abgassysteme. Ein angewandtes Verfahren ist das Thermische Beschichten bei dem ein geeignetes Material im geschmolzenen oder angeschmolzenen Zustand auf das Substrat aufgebracht wird. Eine solche Beschichtung wird üblicherweise aus keramischem Flammspritzpulver hergestellt; die typische Schichtdicke beträgt 0,1 bis 0,4 mm.It is known to improve the engine efficiency of equipping the combustion gas contacting surfaces of OTTO and DIESEL engines with thermal barrier coatings. These are z. B. piston crowns, cylinder heads, valve stems, turbochargers and exhaust systems. An applied method is thermal coating in which a suitable material is applied to the substrate in the molten or fused state. Such a coating is usually made of ceramic flame spray powder; the typical layer thickness is 0.1 to 0.4 mm.

Die Kolben von wassergekühlten Wankelmotoren werden mit dem Motoröl gekühlt; bei luftgekühlten Wankelmotoren geschieht die Kolbenkühlung durch das Verbrennungsgas. Das Kolben/Exzenterwellenlager ist üblicherweise ein Nadellager, dessen Schmierung wie beim 2-Takt OTTO Motor über die Zugabe von Schmieröl zum Brennstoff geschieht. Dieses Nadellager ist ein Schwachpunkt bezüglich der angestrebten Leistungserhöhung und der generellen Langlebigkeit eines luftgekühlten WANLEL Motors, da es infolge hoher Betriebstemperatur ausfällt und zu Schäden des Lagerringes des Kolbens und der Exzenterwelle führt.The pistons of water-cooled Wankel engines are cooled with the engine oil; In air-cooled Wankel engines, the piston is cooled by the combustion gas. The piston / eccentric shaft bearing is usually a needle bearing, the lubrication is done as in the 2-stroke OTTO engine on the addition of lubricating oil to the fuel. This needle bearing is a weak point in terms of the desired performance increase and the general longevity of an air-cooled WANLEL engine, as it fails due to high operating temperature and leads to damage of the bearing ring of the piston and the eccentric shaft.

Die drei dem Brenngas ausgesetzten Kolbenflanken eines 300 ccm WANKEL Motors wurde mit einer 0,2 mm TBC (Thermal Coating Barrier) Beschichtung aus yttriumoxidteilstabilisiertem Zirkonoxid versehen und untersucht. Das Ergebnis der Studie zeigt eine etwa 25%-ige Verminderung der Temperatur des Kolben/Exzenterwellenlagers. Durch eine TBC Beschichtung können die Ausfälle des Lagers vermieden werden. Des Weiteren können die Kolben aus Leichtmetall hergestellt werden.The three piston flanks of the 300 cc WANKEL engine exposed to the fuel gas were provided with a 0.2 mm TBC (Thermal Coating Barrier) coating of yttria-partially stabilized zirconium oxide and examined. The result of the study shows an approximately 25% reduction in the temperature of the piston / eccentric shaft bearing. By a TBC coating the failures of the bearing can be avoided. Furthermore, the pistons can be made of light metal.

Claims (5)

Aufbringung einer Wärmedämmbeschichtung auf die Kolbenflanken von WANKEL Motorkolben, dadurch gekennzeichnet, dass die Beschichtung mit einem Flammspritzverfahren aufgebracht wird und aus einem keramischen Material besteht.Application of a thermal barrier coating on the piston flanks of WANKEL engine pistons, characterized in that the coating is applied by a flame spraying process and consists of a ceramic material. Wärmedämmbeschichtung nach Anspruch 1, dadurch gekennzeichnet, dass das keramische Material yttriumoxidteilstabilisiertes Zirkonoxid ist.Thermal barrier coating according to claim 1, characterized in that the ceramic material yttriumoxidteilstabilisiertes zirconium oxide. Wärmedämmbeschichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eine weitere Beschichtung z. B. aus Lanthanzirkonat aufgebracht wird.Thermal barrier coating according to one of the preceding claims, characterized in that at least one further coating z. B. is applied from Lantanzirkonat. Wärmedämmbeschichtung nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, dass der beschichtete Kolben für einen luftgekühlten WANKEL Motor verwendet wird.Thermal barrier coating according to one of the preceding claims, characterized in that the coated piston is used for an air-cooled WANKEL engine. Wärmedämmbeschichtung nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, dass der beschichtete Kolben aus Leichtmetall besteht.Thermal barrier coating according to one of the preceding claims, characterized in that the coated piston consists of light metal.
DE202011107284U 2011-10-28 2011-10-28 WANKEL - engine piston heat insulation coating Expired - Lifetime DE202011107284U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE202011107284U DE202011107284U1 (en) 2011-10-28 2011-10-28 WANKEL - engine piston heat insulation coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202011107284U DE202011107284U1 (en) 2011-10-28 2011-10-28 WANKEL - engine piston heat insulation coating

Publications (1)

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DE202011107284U1 true DE202011107284U1 (en) 2012-01-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10519854B2 (en) 2015-11-20 2019-12-31 Tenneco Inc. Thermally insulated engine components and method of making using a ceramic coating
US10578050B2 (en) 2015-11-20 2020-03-03 Tenneco Inc. Thermally insulated steel piston crown and method of making using a ceramic coating

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10519854B2 (en) 2015-11-20 2019-12-31 Tenneco Inc. Thermally insulated engine components and method of making using a ceramic coating
US10578050B2 (en) 2015-11-20 2020-03-03 Tenneco Inc. Thermally insulated steel piston crown and method of making using a ceramic coating

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Effective date: 20120223

R156 Lapse of ip right after 3 years