EP3317508A1 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine

Info

Publication number
EP3317508A1
EP3317508A1 EP16740950.7A EP16740950A EP3317508A1 EP 3317508 A1 EP3317508 A1 EP 3317508A1 EP 16740950 A EP16740950 A EP 16740950A EP 3317508 A1 EP3317508 A1 EP 3317508A1
Authority
EP
European Patent Office
Prior art keywords
piston
crown
thermal barrier
barrier coating
edge
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.)
Withdrawn
Application number
EP16740950.7A
Other languages
German (de)
French (fr)
Inventor
Paul Stephen Dimascio
Magdalena GACA
Piotr Zajac
Sebastian NIEDZIELA
Luke Pearson
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.)
Innio Jenbacher GmbH and Co OG
Original Assignee
GE Jenbacher GmbH and Co OHG
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 GE Jenbacher GmbH and Co OHG filed Critical GE Jenbacher GmbH and Co OHG
Publication of EP3317508A1 publication Critical patent/EP3317508A1/en
Withdrawn legal-status Critical Current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 
    • F02F3/02—Pistons  having means for accommodating or controlling heat expansion
    • 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

Definitions

  • the invention relates to a piston for an internal combustion engine with the features of the preamble of claim 1, as well as an internal combustion engine.
  • the object of the invention is to reduce carbon deposits.
  • the cover layer is arranged on the adhesion promoter layer and the adhesion promoter layer is arranged on the crown edge. It has proven to be particularly advantageous to build the thermal barrier coating in two layers.
  • the bonding agent layer is preferably matched in terms of their thermal expansion coefficient between the substrate, so the piston, and the cover layer, so as to keep thermal stresses as low as possible.
  • the thermal barrier coating extends on the piston crown near the crown edge in the direction of a center of the piston crown.
  • the Thermal insulation layer thus preferably forms a circumferential ring on the piston crown, which extends in the direction of the center of the piston.
  • the thermal barrier coating extends on the piston crown near the crown edge in the direction of a radial position spaced from the center of the piston crown, preferably to a radial position of about 80% of the distance between the crown edge and the center of the piston crown, measured from the Middle of the piston crown.
  • the heat-insulating layer preferably covers a seam of the piston crown with a width of about 20% based on the radial dimension of the thermal barrier coating in the direction of the center of the piston crown.
  • the thermal barrier coating has a decreasing thickness in the direction of the center of the piston crown. Due to this gradual course of the thermal barrier coating, a particularly favorable adhesion to the substrate is given and thermal stresses are reduced.
  • a land area or a piston skirt of the piston is free of the thermal barrier coating. It is usually provided that a plurality of grooves is arranged in a land area of the piston near the piston crown.
  • the cover layer of the thermal barrier coating consists of a ceramic, preferably of yttrium-stabilized zirconium oxide, and preferably has a dense-vertically-cracked structure.
  • yttrium-stabilized zirconia yttria stabilized zirconia (YSZ)
  • YSZ yttria stabilized zirconia
  • thermal barrier coatings with DVC structure are superior to conventional layered structures in terms of thermal cycling.
  • the adhesive layer of the thermal barrier coating consists of a metal alloy. Protection is also desired for an internal combustion engine, preferably a stationary internal combustion engine. Advantages of the invention are in particular:
  • the invention allows the use of narrower flames, which is advantageous in terms of hydrocarbon emissions.
  • the invention differs quite fundamentally from known from the prior art measures against carbon deposits. Instead of reducing coking by anti-adhesion layers on the surface, the invention reduces the temperature in the region of the upper land and the upper annular groove and thus prevents the formation of carbon deposits at all.
  • FIG. 2 is a thermal barrier coating in one embodiment.
  • Figure 1 shows a schematic representation of a piston 1 in cross-section for orientation and naming of the components.
  • the piston 1 has a piston crown 2 and a crown edge 3.
  • the piston skirt 9, fire bars 1 1 are formed. These are those areas between which the annular grooves 10 are located for receiving piston rings.
  • a thermal barrier coating 4 extends starting near the outer periphery of the piston 1, ie near the crown edge 3 in the direction of the center 7 of the piston first
  • the thermal barrier coating 4 has an adhesion promoter layer 6 and a cover layer 5.
  • the thickness of the thermal barrier coating 4 is indicated by the reference numeral d.
  • the thermal barrier coating 4 extends as a circumferential ring or hem on the piston crown 2 to near an edge 8.
  • the thickness d of the thermal barrier coating 4 is reduced in a region of the edge 8, resulting in a favorable gradual transition to the uncoated region of the piston crown. 2 results.
  • the radial distance r from the center 7 of the piston 1 is introduced to describe a radial extent of the thermal barrier coating 4.
  • Figure 2 shows a piston 1 with a thermal barrier coating 4 in an embodiment of the invention.
  • the thermal barrier coating 4 is not pulled to the crown edge 3, but runs immediately before this. The layer is therefore only close to the crown edge 3 zoom.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The invention relates to a piston (1) for an internal combustion engine having a piston crown (2) and a circumferentially arranged crown edge (3), wherein a thermal insulation layer (4) is applied near the circumference of the crown edge (3), wherein the thermal insulation layer (4) runs out immediately before the circumference of the crown edge (3).

Description

Kolben für eine Brennkraftmaschine  Piston for an internal combustion engine
Die Erfindung betrifft einen Kolben für eine Brennkraftmaschine mit den Merkmalen des Oberbegriffs des Anspruchs 1 , sowie eine Brennkraftmaschine. The invention relates to a piston for an internal combustion engine with the features of the preamble of claim 1, as well as an internal combustion engine.
Aus dem Betrieb von Kolben ist es bekannt, dass Kohleablagerungen auf einem Kolbenboden oder einer Kolbenkrone die Funktion des Kolbens beeinträchtigen und den Wirkungsgrad sowie Emissionen der betreffenden Brennkraftmaschine verschlechtern können. Aus der US 2008/0167403 A1 ist als Maßnahme gegen den Aufbau von Kohlenstoffablagerungen bekannt, auf einem Kolben oder einem Kolbenring einer Brennkraftmaschine eine Anti-Haft-Schicht aufzubringen. Aus der US 2013/0025561 A1 ist es bekannt, die Mulde eines Muldenkolbens mit einer Wärmedämmschicht (engl, „thermal barrier coating (TBC)") zu versehen, um den Widerstand des Kolbens gegenüber thermomechanischer Ermüdung zu erhöhen. From the operation of pistons, it is known that carbon deposits on a piston crown or piston crown can impair the function of the piston and degrade the efficiency and emissions of the relevant internal combustion engine. From US 2008/0167403 A1 is known as a measure against the build-up of carbon deposits, to apply a non-stick layer on a piston or a piston ring of an internal combustion engine. It is known from US 2013/0025561 A1 to provide the well of a well piston with a thermal barrier coating (TBC) in order to increase the resistance of the piston to thermo-mechanical fatigue.
Aufgabe der Erfindung ist es, Kohleablagerungen zu reduzieren. The object of the invention is to reduce carbon deposits.
Gelöst wird diese Aufgabe durch einen Kolben mit den Merkmalen von Anspruch 1 . This problem is solved by a piston having the features of claim 1.
Indem nahe dem Umfang des Kronenrands eine Wärmedämmschicht aufgebracht ist, werden die Temperaturen im Bereich des obersten Feuersteges und der ersten (obersten) Ringnut reduziert, wodurch die Entstehung von Kohleablagerungen deutlich reduziert wird und die Spannungen im Bereich des obersten Kolbenringes verringert werden. Bevorzugt ist vorgesehen, dass die Deckschicht auf der Haftvermittlerschicht angeordnet ist und die Haftvermittlerschicht am Kronenrand angeordnet ist. Es hat sich als besonders günstig erwiesen, die Wärmedämmschicht zweilagig aufzubauen. Die Haftvermittlerschicht ist dabei vorzugsweise hinsichtlich ihres Wärmeausdehnungskoeffizienten zwischen dem Substrat, also dem Kolben, und der Deckschicht abgestimmt, um so Wärmespannungen möglichst gering zu halten. By applying a heat-insulating layer near the circumference of the crown edge, the temperatures in the region of the uppermost land and the first (uppermost) annular groove are reduced, whereby the formation of carbon deposits is significantly reduced and the stresses in the region of the uppermost piston ring are reduced. It is preferably provided that the cover layer is arranged on the adhesion promoter layer and the adhesion promoter layer is arranged on the crown edge. It has proven to be particularly advantageous to build the thermal barrier coating in two layers. The bonding agent layer is preferably matched in terms of their thermal expansion coefficient between the substrate, so the piston, and the cover layer, so as to keep thermal stresses as low as possible.
Bevorzugt ist vorgesehen, dass die Wärmedämmschicht sich auf der Kolbenkrone nahe dem Kronenrand in Richtung einer Mitte der Kolbenkrone erstreckt. Die Wärmedämmschicht bildet also vorzugsweise einen umlaufenden Ring auf der Kolbenkrone, der sich in Richtung Zentrum des Kolbens erstreckt. It is preferably provided that the thermal barrier coating extends on the piston crown near the crown edge in the direction of a center of the piston crown. The Thermal insulation layer thus preferably forms a circumferential ring on the piston crown, which extends in the direction of the center of the piston.
Bevorzugt ist vorgesehen, dass die Wärmedämmschicht sich auf der Kolbenkrone nahe vom Kronenrand in Richtung einer von der Mitte der Kolbenkrone beabstandeten radialen Position erstreckt, vorzugsweise zu einer radialen Position von etwa 80% der Strecke zwischen dem Kronenrand und der Mitte der Kolbenkrone, gemessen von der Mitte der Kolbenkrone. In anderen Worten bedeckt die Wärmedämmschicht bevorzugt einen Saum der Kolbenkrone mit einer Breite von etwa 20% bezogen auf die radiale Abmessung der Wärmedämmschicht in Richtung Zentrum der Kolbenkrone. It is preferably provided that the thermal barrier coating extends on the piston crown near the crown edge in the direction of a radial position spaced from the center of the piston crown, preferably to a radial position of about 80% of the distance between the crown edge and the center of the piston crown, measured from the Middle of the piston crown. In other words, the heat-insulating layer preferably covers a seam of the piston crown with a width of about 20% based on the radial dimension of the thermal barrier coating in the direction of the center of the piston crown.
Es kann vorgesehen sein, dass die Wärmedämmschicht eine abnehmende Dicke in Richtung der Mitte der Kolbenkrone aufweist. Durch diesen graduellen Verlauf der Wärmedämmschicht ist eine besonders günstige Anhaftung zum Substrat gegeben und Wärmespannungen werden reduziert. It can be provided that the thermal barrier coating has a decreasing thickness in the direction of the center of the piston crown. Due to this gradual course of the thermal barrier coating, a particularly favorable adhesion to the substrate is given and thermal stresses are reduced.
Es kann vorgesehen sein, dass ein Feuersteg-Bereich oder ein Kolbenhemd des Kolbens frei von der Wärmedämmschicht ist. Üblicherweise ist vorgesehen, dass in einem Feuersteg-Bereich des Kolbens nahe der Kolbenkrone eine Vielzahl von Nuten angeordnet ist. It can be provided that a land area or a piston skirt of the piston is free of the thermal barrier coating. It is usually provided that a plurality of grooves is arranged in a land area of the piston near the piston crown.
Bevorzugt ist vorgesehen, dass die Deckschicht der Wärmedämmschicht aus einer Keramik, vorzugsweise aus Yttrium-stabilisiertem Zirkonoxid besteht und vorzugsweise eine Dense-Vertically-Cracked-Struktur aufweist. In Versuchen der Anmelderin hat sich Yttrium-stabilisiertes Zirkonoxid (engl, „yttria stabilized zirconia (YSZ)"), welches vorzugsweise über Plasmaspray aufgebracht wird, als besonders günstig als Wärmedämmschicht herausgestellt. Bevorzugt weist die Wärmedämmschicht eine sogenannte DVC (engl, für„Dense Vertically Cracked", d.h. dichte, vertikal gerissene) Struktur auf. Wärmedämmschichten mit DVC-Struktur sind hinsichtlich thermischer Zyklierung konventionellen Schichtstrukturen überlegen. It is preferably provided that the cover layer of the thermal barrier coating consists of a ceramic, preferably of yttrium-stabilized zirconium oxide, and preferably has a dense-vertically-cracked structure. In experiments of the applicant, yttrium-stabilized zirconia (yttria stabilized zirconia (YSZ)), which is preferably applied by plasma spray, has been found to be particularly advantageous as a thermal barrier coating Vertically Cracked ", ie dense, vertically cracked) structure. Thermal barrier coatings with DVC structure are superior to conventional layered structures in terms of thermal cycling.
Es kann vorgesehen sein, dass die Haftvermittlerschicht der Wärmedämmschicht aus einer Metalllegierung besteht. Schutz wird auch begehrt für eine Brennkraftmaschine, vorzugsweise eine stationäre Brennkraftmaschine. Vorteile der Erfindung sind insbesondere: It can be provided that the adhesive layer of the thermal barrier coating consists of a metal alloy. Protection is also desired for an internal combustion engine, preferably a stationary internal combustion engine. Advantages of the invention are in particular:
- Verbesserte Haltbarkeit, Robustheit und Verlässlichkeit der Brennkraftmaschine,Improved durability, robustness and reliability of the internal combustion engine,
- Reduzierter Kraftstoffverbrauch, - reduced fuel consumption,
- Verringerter Ölverbrauch,  - reduced oil consumption,
- Erhöhte Öl- und Ölfilterlebensdauer,  - Increased oil and oil filter life,
- Erhöhte Lebensdauer des obersten Kolbenrings,  - Increased life of the top piston ring,
- Verringerte Wahrscheinlichkeit für unerwarteten Zylindertausch,  - Reduced probability of unexpected cylinder exchange,
- Erweiterte Möglichkeiten für Emissions- und Wirkungsgradoptimierung. Als ebenfalls sehr vorteilhaft hat es sich herausgestellt, dass durch die Erfindung gegebenenfalls auf den Einsatz eines Schaberings verzichtet werden kann.  - Expanded possibilities for emission and efficiency optimization. As also very advantageous, it has been found that, if necessary, can be dispensed with by the invention on the use of a scraper ring.
Die Erfindung erlaubt die Verwendung schmälerer Feuerstege, was vorteilhaft hinsichtlich der Kohlenwasserstoff-Emissionen ist. The invention allows the use of narrower flames, which is advantageous in terms of hydrocarbon emissions.
Die Temperaturen unterhalb der Kolbenkrone werden reduziert, was die Öllebensdauer erhöht. The temperatures below the piston crown are reduced, which increases the oil life.
Die Erfindung unterscheidet sich ganz grundsätzlich von aus dem Stand der Technik bekannten Maßnahmen gegen Kohleablagerungen. Anstatt eine Kohleablagerung durch Anti-Haft-Schichten an der Oberfläche zu verringern, reduziert die Erfindung die Temperatur im Bereich des oberen Feuersteges und der oberen Ringnut und verhindert somit überhaupt das Entstehen von Kohleablagerungen. The invention differs quite fundamentally from known from the prior art measures against carbon deposits. Instead of reducing coking by anti-adhesion layers on the surface, the invention reduces the temperature in the region of the upper land and the upper annular groove and thus prevents the formation of carbon deposits at all.
Die Erfindung wird im Folgenden durch die Figuren näher erläutert. Darin zeigt: The invention is explained in more detail below by the figures. It shows:
Fig. 1 eine schematische Darstellung eines Kolbens im Überblick, 1 is a schematic representation of a piston at a glance,
Fig. 2 eine Wärmedämmschicht in einem Ausführungsbeispiel. Figur 1 zeigt eine schematisierte Darstellung eines Kolbens 1 im Querschnitt zur Orientierung und Benennung der Bauteile. Der Kolben 1 weist eine Kolbenkrone 2 und einen Kronenrand 3 auf. Am zum Kronenrand 3 benachbarten Teil der Mantelfläche des Kolbens 1 , dem Kolbenhemd 9, sind Feuerstege 1 1 ausgebildet. Es sind dies jene Bereiche, zwischen denen die Ringnuten 10 zur Aufnahme von Kolbenringen liegen. Eine Wärmedämmschicht 4 erstreckt sich beginnend nahe dem äußeren Umfang des Kolbens 1 , also nahe vom Kronenrand 3 in Richtung Mitte 7 des Kolbens 1 . Die Wärmedämmschicht 4 weist im gezeigten Ausführungsbeispiel eine Haftvermittlerschicht 6 und eine Deckschicht 5 auf. Die Stärke der Wärmedämmschicht 4 ist mit dem Bezugszeichen d angegeben. Die Wärmedämmschicht 4 erstreckt sich als umlaufender Ring oder Saum auf der Kolbenkrone 2 bis nahe einem Rand 8. Vorzugsweise verringert sich die Stärke d der Wärmedämmschicht 4 in einem Bereich des Randes 8, wodurch sich ein günstiger gradueller Übergang zu dem nicht beschichteten Bereich der Kolbenkrone 2 ergibt. Der radiale Abstand r von der Mitte 7 des Kolbens 1 wird zur Beschreibung einer radialen Erstreckung der Wärmedämmschicht 4 eingeführt. Fig. 2 is a thermal barrier coating in one embodiment. Figure 1 shows a schematic representation of a piston 1 in cross-section for orientation and naming of the components. The piston 1 has a piston crown 2 and a crown edge 3. At the crown edge 3 adjacent part of the lateral surface of the piston 1, the piston skirt 9, fire bars 1 1 are formed. These are those areas between which the annular grooves 10 are located for receiving piston rings. A thermal barrier coating 4 extends starting near the outer periphery of the piston 1, ie near the crown edge 3 in the direction of the center 7 of the piston first In the exemplary embodiment shown, the thermal barrier coating 4 has an adhesion promoter layer 6 and a cover layer 5. The thickness of the thermal barrier coating 4 is indicated by the reference numeral d. The thermal barrier coating 4 extends as a circumferential ring or hem on the piston crown 2 to near an edge 8. Preferably, the thickness d of the thermal barrier coating 4 is reduced in a region of the edge 8, resulting in a favorable gradual transition to the uncoated region of the piston crown. 2 results. The radial distance r from the center 7 of the piston 1 is introduced to describe a radial extent of the thermal barrier coating 4.
Figur 2 zeigt einen Kolben 1 mit einer Wärmedämmschicht 4 in einem erfindungsgemäßen Ausführungsbeispiel. Figure 2 shows a piston 1 with a thermal barrier coating 4 in an embodiment of the invention.
Die Wärmedämmschicht 4 ist dabei nicht bis zum Kronenrand 3 gezogen, sondern läuft unmittelbar vor diesem aus. Die Schicht geht also nur nahe an den Kronenrand 3 heran. The thermal barrier coating 4 is not pulled to the crown edge 3, but runs immediately before this. The layer is therefore only close to the crown edge 3 zoom.
Liste der verwendeten Bezugszeichen: List of reference numbers used:
1 Kolben 1 piston
2 Kolbenkrone  2 piston crown
3 Kronenrand  3 crown edge
4 Wärmedämmschicht  4 thermal barrier coating
5 Deckschicht  5 topcoat
6 Haftvermittlerschicht  6 adhesion promoter layer
7 Mitte der Kolbenkrone  7 middle of the piston crown
8 zentraler Rand der Wärmedämmschicht 8 central edge of the thermal barrier coating
9 Kolbenhemd 9 piston shirt
10 Ringnut  10 ring groove
1 1 Feuersteg-Bereich  1 1 flank area

Claims

Patentansprüche claims
Kolben (1 ) für eine Brennkraftmaschine mit einer Kolbenkrone (2) und einem umfänglich angeordneten Kronenrand (3), dadurch gekennzeichnet, dass nahe dem Umfang des Kronenrands (3) eine Wärmedämmschicht (4) aufgebracht ist, wobei die Wärmedämmschicht (4) unmittelbar vor dem Umfang des Kronenrandes (3) ausläuft. Piston (1) for an internal combustion engine having a piston crown (2) and a circumferentially arranged crown edge (3), characterized in that near the periphery of the crown edge (3) a thermal barrier coating (4) is applied, wherein the thermal barrier coating (4) immediately before the circumference of the crown edge (3) expires.
Kolben nach Anspruch 1 , wobei die Wärmedämmschicht (4) eine Deckschicht (5) und eine Haftvermittlerschicht (6) umfasst, wobei die Deckschicht (5) auf der Haftvermittlerschicht (6) angeordnet ist und die Haftvermittlerschicht (6) am Kronenrand angeordnet ist. Piston according to claim 1, wherein the thermal barrier coating (4) comprises a cover layer (5) and an adhesion promoter layer (6), wherein the cover layer (5) is arranged on the adhesion promoter layer (6) and the adhesion promoter layer (6) is arranged on the crown edge.
Kolben nach wenigstens einem der vorangegangenen Ansprüche, wobei die Wärmedämmschicht (4) sich auf der Kolbenkrone (2) nahe von dem Kronenrand (3) in Richtung einer Mitte (7) der Kolbenkrone (2) erstreckt. Piston according to at least one of the preceding claims, wherein the thermal barrier coating (4) extends on the piston crown (2) near the crown edge (3) in the direction of a center (7) of the piston crown (2).
Kolben nach Anspruch 3, wobei die Wärmedämmschicht (4) sich auf der Kolbenkrone (2) nahe vom Kronenrand (3) in Richtung einer von der Mitte (7) der Kolbenkrone (2) beabstandeten radialen Position (r) erstreckt, vorzugsweise zu einer radialen Position (r) von etwa 80% der Strecke zwischen dem Kronenrand (3) und der Mitte (7) der Kolbenkrone (2), gemessen von der Mitte (7) der Kolbenkrone (2). Piston according to claim 3, wherein the thermal barrier coating (4) extends on the piston crown (2) near the crown edge (3) in the direction of a radial position (r) spaced from the center (7) of the piston crown (2), preferably to a radial one Position (r) of about 80% of the distance between the crown edge (3) and the center (7) of the piston crown (2), measured from the center (7) of the piston crown (2).
Kolben nach wenigstens einem der vorangegangenen Ansprüche, wobei die Wärmedämmschicht (4) eine abnehmende Dicke (d) in Richtung der Mitte (7) der Kolbenkrone (2) aufweist. Piston according to at least one of the preceding claims, wherein the thermal barrier coating (4) has a decreasing thickness (d) in the direction of the center (7) of the piston crown (2).
Kolben nach wenigstens einem der vorangegangenen Ansprüche, wobei ein Feuersteg-Bereich (1 1 ) des Kolbens (1 ) frei von der Wärmedämmschicht (4) ist. Kolben nach wenigstens einem der vorangegangenen Ansprüche, wobei in einem Feuersteg-Bereich (1 1 ) des Kolbens (1 ) nahe der Kolbenkrone (2) eine Vielzahl von Nuten (10) angeordnet sind. Piston according to at least one of the preceding claims, wherein a land portion (1 1) of the piston (1) is free of the thermal barrier coating (4). Piston according to at least one of the preceding claims, wherein in a land portion (1 1) of the piston (1) near the piston crown (2) a plurality of grooves (10) are arranged.
Kolben nach wenigstens einem der Ansprüche 2 bis 7, wobei die Deckschicht (5) der Wärmedämmschicht (4) aus einer Keramik, vorzugsweise aus Yttriumstabilisiertem Zirkonoxid besteht und vorzugsweise eine dense-vertically- cracked- Struktur aufweist. Piston according to at least one of claims 2 to 7, wherein the cover layer (5) of the thermal barrier coating (4) consists of a ceramic, preferably of yttrium-stabilized zirconium oxide, and preferably has a dense-vertically-cracked structure.
Kolben nach wenigstens einem der Ansprüche 2 bis 8, wobei die Haftvermittlerschicht (6) der Wärmedämmschicht (4) aus einer Metalllegierung besteht. Piston according to at least one of claims 2 to 8, wherein the adhesive layer (6) of the thermal barrier coating (4) consists of a metal alloy.
Brennkraftmaschine, bevorzugt stationäre Brennkraftmaschine, mit wenigstens einem Kolben (1 ) nach wenigstens einem der vorangegangenen Ansprüche. Internal combustion engine, preferably stationary internal combustion engine, with at least one piston (1) according to at least one of the preceding claims.
EP16740950.7A 2015-07-03 2016-06-30 Piston for an internal combustion engine Withdrawn EP3317508A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA429/2015A AT517589B1 (en) 2015-07-03 2015-07-03 Piston for an internal combustion engine
PCT/AT2016/050239 WO2017004645A1 (en) 2015-07-03 2016-06-30 Piston for an internal combustion engine

Publications (1)

Publication Number Publication Date
EP3317508A1 true EP3317508A1 (en) 2018-05-09

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EP16740950.7A Withdrawn EP3317508A1 (en) 2015-07-03 2016-06-30 Piston for an internal combustion engine

Country Status (5)

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US (1) US10634090B2 (en)
EP (1) EP3317508A1 (en)
AT (1) AT517589B1 (en)
CA (1) CA2990953A1 (en)
WO (1) WO2017004645A1 (en)

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US11719184B1 (en) 2022-01-21 2023-08-08 Tenneco Inc. Piston with engineered crown coating and method of manufacturing

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WO2017004645A1 (en) 2017-01-12
AT517589B1 (en) 2017-03-15

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