EP0086284A1 - Piston for an internal-combustion engine running on heavy oil - Google Patents

Piston for an internal-combustion engine running on heavy oil Download PDF

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Publication number
EP0086284A1
EP0086284A1 EP82201613A EP82201613A EP0086284A1 EP 0086284 A1 EP0086284 A1 EP 0086284A1 EP 82201613 A EP82201613 A EP 82201613A EP 82201613 A EP82201613 A EP 82201613A EP 0086284 A1 EP0086284 A1 EP 0086284A1
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EP
European Patent Office
Prior art keywords
piston
blind holes
piston according
rods
heavy oil
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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.)
Granted
Application number
EP82201613A
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German (de)
French (fr)
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EP0086284B1 (en
Inventor
Horst Dr. Moebus
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.)
Kolbenschmidt AG
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Kolbenschmidt AG
Karl Schmidt GmbH
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Publication of EP0086284A1 publication Critical patent/EP0086284A1/en
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Publication of EP0086284B1 publication Critical patent/EP0086284B1/en
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    • 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 
    • F02F3/16—Pistons  having cooling means
    • F02F3/18—Pistons  having cooling means the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston
    • 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
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Definitions

  • the invention relates to a piston with cooling oil-carrying cavities in the piston head consisting of an iron material for internal combustion engines operated with heavy oil.
  • heavy oil can contain up to 5% sulfur, of which approx. 0.1% is converted into sulfur trioxide during combustion and forms sulfuric acid with the help of water vapor. If the temperature of the walls surrounding the combustion chamber falls below the acid dew point, the sulfuric acid can precipitate and cause corrosion.
  • the piston in the area of the ring, the piston rings and the cylinder wall in the TDC area are particularly at risk. The increased wear caused by acid corrosion leads to increased gas passage and oil consumption.
  • the blind holes are preferably made from the inside of the piston and only in exceptional cases from the piston head.
  • the outer surface temperature of the piston crown rises radially from the inside to the outside, so that the temperature of the edge region of the piston crown increases radially from the inside to the outside from approximately 250 to approximately 350 ° C. in the normal case.
  • the temperature in the area of the first piston ring groove is 100-120 ° C, so that the The acid dew point of sulfuric acid, which can rise to approx. 180 ° C depending on the pressure and sulfur content of the heavy oil, is significantly below.
  • the inventive arrangement of the rods made of a good heat-conducting material behind the ring portion of the piston succeeds in increasing the temperature of the piston in this area, but in particular in the area of the first piston ring groove, to k 150 ° C., so that the risk of falling below the Acid dew point for sulfuric acid is largely eliminated and the components resulting for the formation of sulfuric acid can be expelled with the exhaust gases.
  • the blind holes can be arranged parallel or inclined to the longitudinal axis of the piston.
  • the rods which preferably consist of copper or silver or their alloys, are expediently screwed or glued into the blind holes.
  • a modification of the invention is to be seen in the fact that sodium is used as a good heat-conducting material in blind holes provided with a stopper from the piston crown or in a correspondingly arranged channel. is introduced, whereby heat conduction from the piston crown to the ring section is achieved by splashing.
  • FIG. 1 shows a partial section of a longitudinal section through the piston head of a piston 2 provided with the cooling channel 1, with a blind hole 4 made behind the ring section 3 parallel to the longitudinal axis of the piston and into which a copper rod 5 having a waisted stem is screwed in such a way that only its ends are in direct contact with the piston 2.
  • FIG. 3 shows a partial section of a longitudinal section through the piston head of a piston 11 having a cooling channel 10, in which a blind hole 13 is provided from the edge of the piston head 12, parallel to the longitudinal axis of the piston.
  • Sodium 15 is located in the blind hole 13 closed with the welded plug 14.

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  • 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)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

1. A piston for internal combustion engines operated with heavy oil, which piston has a piston head consisting of ferrous material and having cavities for conducting cooling oil, characterized by the provision of blind holes (4, 9), which are provided in the skirt of the piston behind the ring-carrying portion (3), and of rods (5, 8) consisting of a material having a high thermal conductivity and inserted in respective ones of said blind holes for ensuring a controlled transfer of heat from the piston to those regions of the ring-carrying portion of the piston in which the temperature must be increased in order to prevent an occurrence of temperatures below the dew point temperature of sulfuric acid.

Description

Die Erfindung betrifft einen Kolben mit kühlölführenden Hohlräumen im aus einem Eisenwerkstoff bestehenden Kolbenkopf für mit Schweröl betriebene Brennkraftmaschinen.The invention relates to a piston with cooling oil-carrying cavities in the piston head consisting of an iron material for internal combustion engines operated with heavy oil.

Der ständig steigende Bedarf an Leichtölen hat dazu geführt, daß der früher relativ breite Siedeschnitt von Schwerölen durch entsprechende Maßnahmen heute enger ist, mit der Folge, daß die Konzentration der im Rohöl und damit im Schweröl enthaltenen schädlichen Bestandteile, wie Schwefel, Vanadium und Natrium, angestiegen ist. So können heute im Schweröl bis zu 5 % Schwefel enthalten sein, wovon ca. 0,1 % bei der Verbrennung in Schwefeltrioxid umgewandelt wird und mit Hilfe von Wasserdampf Schwefelsäure bildet. Wenn die Temperatur der den Brennraum umgebenden Wandungen den Säuretaupunkt unterschreitet, kann sich die Schwefelsäure niederschlagen und Korrosion verursachen. Gefährdete Stellen sind insbesondere der Kolben im Bereich der Ringpartie, die Kolbenringe sowie die-Zylinderwandung im OT-Bereich. Der durch Säurekorrosion erhöhte Verschleiß führt zu einem vergrößerten Gasdurchlaß und Ölverbrauch.The constantly increasing demand for light oils has led to the fact that the previously relatively broad boiling cut of heavy oils is now narrower through appropriate measures, with the result that the concentration of the harmful components contained in the crude oil and thus in the heavy oil, such as sulfur, vanadium and sodium, has risen. Today, heavy oil can contain up to 5% sulfur, of which approx. 0.1% is converted into sulfur trioxide during combustion and forms sulfuric acid with the help of water vapor. If the temperature of the walls surrounding the combustion chamber falls below the acid dew point, the sulfuric acid can precipitate and cause corrosion. The piston in the area of the ring, the piston rings and the cylinder wall in the TDC area are particularly at risk. The increased wear caused by acid corrosion leads to increased gas passage and oil consumption.

Zur Lösung dieses Problems ist es bereits bekannt, den Schmierölen alkalische Wirkstoffe zuzugeben, die die sauren und korrosiven Verbrennungsprodukte neutralisieren sollen; es bleiben dann Schwefelsäure, Kolben, Kolbenringe und Zylinderwandung durch den Schmierfilm voneinander getrennt, da die Schwefelsäure neutralisiert wird. Allerdings wird auch bei optimaler Schmierfilmausbildung und ausreichendem Neutralisationsvermögen die angestrebte Wirkung nicht voll erreicht, so daß Korrosionsschäden eintreten können.To solve this problem, it is already known to add alkaline agents to the lubricating oils, which are intended to neutralize the acidic and corrosive combustion products; sulfuric acid, pistons, piston rings and cylinder wall then remain separated from one another by the lubricating film, since the sulfuric acid is neutralized. However, even with optimal lubricant film formation and sufficient neutralization capacity, the desired effect is not fully achieved, so that corrosion damage can occur.

Es ist die Aufgabe der vorliegenden Erfindung, den eingangs beschriebenen Kolben durch konstruktive Maßnahmen so zu gestalten, daß die Temperatur des Kolbens im Bereich der Ringpartie, wenigstens jedoch im Bereich der ersten Kolbenringnute, so angehoben wird, daß keine Unterschreitung des Säuretaupunktes der Schwefelsäure stattfindet.It is the object of the present invention to design the piston described at the outset by constructive measures so that the temperature of the piston is raised in the area of the ring section, but at least in the area of the first piston ring groove, in such a way that the acid dew point of the sulfuric acid does not fall below.

Die Lösung dieser Aufgabe erfolgt durch auf dem Umfang im Bereich hinter der Ringpartie des Kolbens angebrachte Sacklöcher, in die jeweils ein aus einem gut wärmeleitenden Werkstoff bestehender Stab eingesetzt ist.This problem is solved by blind holes on the circumference in the area behind the ring portion of the piston, into each of which a rod made of a good heat-conducting material is inserted.

Die Sacklöcher sind vorzugsweise von der Innenseite des Kolbens und nur in Ausnahmefällen vom Kolbenboden her angebracht.The blind holes are preferably made from the inside of the piston and only in exceptional cases from the piston head.

Beim Kolben für mit Schweröl betriebenen Brennkraftmaschinen steigt die Außenflächentemperatur des Kolbenbodens radial von innen nach außen an, so daß im Normalfall die - Temperatur des Randbereiches des Kolbenbodens radial von innen nach außen von ca. 250 auf ca. 350 °C zunimmt. Die Temperatur im Bereich der ersten Kolbenringnute beträgt 100 - 120 °C, so daß der Säuretaupunkt der Schwefelsäure, der in Abhängigkeit vom Druck und vom Schwefelgehalt des Schweröls bis auf ca. 180 °C ansteigen kann, deutlich unterschritten ist. Durch die erfindungsgemäße Anordnung der aus einem gut wärmeleitenden Werkstoff bestehenden Stäbe hinter der Ringpartie des Kolbens gelingt es die Temperatur des Kolbens in diesem Bereich, insbesodnere jedoch im Bereich der ersten Kolbenringnute, auf k 150 °C zu erhöhen, so daß die Gefahr der Unterschreitung des Säuretaupunktes für Schwefelsäure weitgehend beseitigt ist und die für die Bildung der Schwefelsäure anfallenden Komponenten mit den Abgasen ausgestoßen werden können.In the case of pistons for internal combustion engines operated with heavy oil, the outer surface temperature of the piston crown rises radially from the inside to the outside, so that the temperature of the edge region of the piston crown increases radially from the inside to the outside from approximately 250 to approximately 350 ° C. in the normal case. The temperature in the area of the first piston ring groove is 100-120 ° C, so that the The acid dew point of sulfuric acid, which can rise to approx. 180 ° C depending on the pressure and sulfur content of the heavy oil, is significantly below. The inventive arrangement of the rods made of a good heat-conducting material behind the ring portion of the piston succeeds in increasing the temperature of the piston in this area, but in particular in the area of the first piston ring groove, to k 150 ° C., so that the risk of falling below the Acid dew point for sulfuric acid is largely eliminated and the components resulting for the formation of sulfuric acid can be expelled with the exhaust gases.

Die Sacklöcher können parallel oder geneigt zur Kolbenlängsachse verlaufend angeordnet sein.The blind holes can be arranged parallel or inclined to the longitudinal axis of the piston.

Zweckmäßigerweise sind die vorzugsweise aus Kupfer oder Silber bzw. deren Legierungen bestehenden Stäbe in die Sacklöcher eingeschraubt oder eingeklebt.The rods, which preferably consist of copper or silver or their alloys, are expediently screwed or glued into the blind holes.

Um einen gezielten Wärmetransport vom Kolben her zu den Bereichen der Ringpartie des Kolbens, in denen eine Temperaturerhöhung zur Verhinderung der Unterschreitung des Taupunktes der Schwefelsäure notwendig ist, zu erreichen, stehen nur die Enden der einen taillierten Schaft aufweisenden Stäbe mit dem Kolben in unmittelbarem Kontakt.In order to achieve a specific heat transfer from the piston to the areas of the ring part of the piston where an increase in temperature is necessary to prevent the sulfuric acid from falling below the dew point, only the ends of the rods with a waisted stem are in direct contact with the piston.

Eine Abwandlung der Erfindung ist darin zu sehen, daß in vom Kolbenboden her angebrachte mit einem Stopfen verschlossene Sacklöcher oder in einen entsprechend angeordneten Kanal Natrium als gut wärmeleitendes Material . eingebracht ist, wodurch eine Wärmeleitung vom Kolbenboden zur Ringpartie durch Planschwirkung erreicht wird.A modification of the invention is to be seen in the fact that sodium is used as a good heat-conducting material in blind holes provided with a stopper from the piston crown or in a correspondingly arranged channel. is introduced, whereby heat conduction from the piston crown to the ring section is achieved by splashing.

Die Erfindung ist in den nachfolgend näher erläuterten Zeichnungen beispielhaft dargestellt.The invention is illustrated by way of example in the drawings explained in more detail below.

Es zeigt Fig. 1 den Teilausschnitt eines Längsschnittes durch den Kolbenkopf eines mit dem Kühlkanal 1 versehenen Kolbens 2 mit einem hinter der Ringpartie 3 parallel zur Kolbenlängsachse angebrachten Sackloch 4, in das ein einen taillierten Schaft besitzender Kupferstab 5, in der Weise eingeschraubt ist, daß nur seine Enden unmittelbar mit dem Kolben 2 in Kontakt stehen.1 shows a partial section of a longitudinal section through the piston head of a piston 2 provided with the cooling channel 1, with a blind hole 4 made behind the ring section 3 parallel to the longitudinal axis of the piston and into which a copper rod 5 having a waisted stem is screwed in such a way that only its ends are in direct contact with the piston 2.

Gemäß Fig. 2, die einen Teilausschnitt eines Längsschnittes durch den Kolbenkopf eines Kolbens 6 mit Kühlkanal 7 darstellt, ist der wärmeleitende Kupferstab 8 in ein geneigt zur Kolbenlängsachse verlaufendes von der Kolbeninnenseite her angebrachtes Sackloch 9 eingeschraubt.2, which shows a partial section of a longitudinal section through the piston head of a piston 6 with a cooling channel 7, the heat-conducting copper rod 8 is screwed into a blind hole 9, which runs from the inside of the piston and runs inclined to the longitudinal axis of the piston.

In Fig. 3 ist ein Teilausschnitt eines Längsschnittes durch den Kolbenkopf eines einen Kühlkanal 10 aufweisenden Kolbens 11 wiedergegeben, bei dem vom Rand des Kolbenbodens 12 aus ein parallel zur Kolbenlängsachse angebrachtes Sackloch 13 vorhanden ist. In dem mit dem verschweißten Stopfen 14 verschlossenen Sackloch 13 befindet sich Natrium 15.FIG. 3 shows a partial section of a longitudinal section through the piston head of a piston 11 having a cooling channel 10, in which a blind hole 13 is provided from the edge of the piston head 12, parallel to the longitudinal axis of the piston. Sodium 15 is located in the blind hole 13 closed with the welded plug 14.

Am Beispiel eines gebauten, einen Durchmesser von 320 mm aufweisenden Kolbens, dessen Oberteil aus Stahl und dessen Unterteil aus Gußeisen mit Kugelgraphit bestand und bei dem im Bereich hinter dem Feuersteg und der ersten Kolbenringnute 60 Kupferstifte in entsprechenden Sacklöchern angeordnet waren, konnte durch eine Berechnung der Tempera- . turfelder bei einem Druck von Pe = 23,5 bar und n = 800 l/min nachgewiesen werden, daß sich die Temperatur unter dem Einfluß der Kupferstifte in der ersten Kolbenringnute gegenüber derjenigen in der ersten Kolbenringnute eines herkömmlichen gebauten Kolbens um 23 °C erhöhen läßt.Using the example of a built piston with a diameter of 320 mm, the upper part of which was made of steel and the lower part of which was made of spheroidal graphite cast iron and in which 60 copper pins were arranged in corresponding blind holes in the area behind the top land and the first piston ring groove, the calculation of Tempera. turfelder at a pressure of Pe = 23.5 bar and n = 800 l / min it can be demonstrated that the temperature can be increased by 23 ° C under the influence of the copper pins in the first piston ring groove compared to that in the first piston ring groove of a conventional piston .

Claims (10)

1. Kolben mit kühlölführenden Hohlräumen im aus einem Eisenwerkstoff bestehenden Kolbenkopf für mit Schweröl betriebene Brennkraftmaschinen, gekennzeichnet durch, auf dem Umfang im Bereich hinter der Ringpartie (3) angebrachte Sacklöcher (4, 9), in die jeweils ein aus einem gut wärmeleitenden Werkstoff bestehender Stab (5, 8) eingesetzt ist.1.Piston with cooling oil-carrying cavities in the piston head made of an iron material for internal combustion engines operated with heavy oil, characterized by blind holes (4, 9) made on the circumference in the area behind the ring section (3), into each of which a made of a good heat-conducting material Rod (5, 8) is inserted. 2. Kolben nach Anspruch 1, dadurch gekennzeichnet, daß die Sacklöcher (4, 9) von der Innenseite des Kolbens (2, 6) her angebracht sind.2. Piston according to claim 1, characterized in that the blind holes (4, 9) from the inside of the piston (2, 6) are made. 3. Kolben nach Anspruch 1, dadurch gekennzeichnet, daß die Sacklöcher (13) vom Kolbenboden her angebracht sind.3. Piston according to claim 1, characterized in that the blind holes (13) are made from the piston head. 4. Kolben nach den Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Sacklöcher (4) parallel zur Kolbenlängsachse verlaufend angeordnet sind.4. Piston according to claims 1 to 3, characterized in that the blind holes (4) are arranged parallel to the longitudinal axis of the piston. 5. Kolben nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Sacklöcher (9) geneigt zur Kolbenlängsachse angeordnet sind.5. Piston according to claims 1 to 3, characterized in that the blind holes (9) are arranged inclined to the longitudinal axis of the piston. 6. Kolben nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß die Stäbe (5, 8) aus Kupfer oder Silber _bzw. deren Legierungen bestehen.6. Piston according to claims 1 to 5, characterized in that the rods (5, 8) made of copper or silver _bzw. their alloys are made. 7. Kolben nach Ansprüchen 1 bis 6, dadurch gekenn- zeichnet, daß die Stäbe (5, 8) in die Sacklöcher (4, 9) eingeschraubt sind.7. Piston according to claims 1 to 6, characterized in that the rods (5, 8) are screwed into the blind holes (4, 9). 8. Kolben nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß die Stäbe (5, 8) in die Sacklöcher (4, 9) eingeklebt sind.8. Piston according to claims 1 to 6, characterized in that the rods (5, 8) in the blind holes (4, 9) are glued. 9. Kolben nach den Ansprüchen 1 bis 8, dadurch gekennzeichent, daß die Stäbe (5, 8) einen taillierten Schaft besitzen und nur mit ihren Enden unmittelbar mit dem Kolben (2, 6) in Kontakt stehen.9. Piston according to claims 1 to 8, characterized in that the rods (5, 8) have a waisted shaft and are only in direct contact with the piston (2, 6) at their ends. 10. Kolben nach einem oder mehreren der Ansprüche 1 bis 9, dadurch abgewandelt, daß sich in vom Kolbenboden (12) her angebrachten mit einem Stopfen (14) verschlossenen - Sacklöchern (13) oder einem entsprechend angebrachten Kanal Natrium (15) befindet.10. Piston according to one or more of claims 1 to 9, modified in that from the piston crown (12) attached with a stopper (14) closed - blind holes (13) or a correspondingly attached channel sodium (15).
EP82201613A 1982-02-13 1982-12-17 Piston for an internal-combustion engine running on heavy oil Expired EP0086284B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823205173 DE3205173A1 (en) 1982-02-13 1982-02-13 PISTON FOR COMBUSTION ENGINES USED WITH HEAVY OIL
DE3205173 1982-02-13

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EP0086284A1 true EP0086284A1 (en) 1983-08-24
EP0086284B1 EP0086284B1 (en) 1986-10-15

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DE (2) DE3205173A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570439A1 (en) * 1984-09-20 1986-03-21 Semt METHOD AND DEVICE FOR REGULATING THE TEMPERATURE OF THE INTERNAL SURFACE OF CYLINDER SHAFTS OF AN INTERNAL COMBUSTION ENGINE
FR2905145A1 (en) * 2006-08-23 2008-02-29 Peugeot Citroen Automobiles Sa Piston for an automobile vehicle engine e.g. diesel engine, comprises a piston body having an outer side of combustion, an inner vault and a thermal short-circuit capable of deviating thermal flux from outer side towards the inner vault
WO2011060004A1 (en) * 2009-11-10 2011-05-19 Federal-Mogul Corporation Piston with blow-by feature and method of preventing catastrophic failure to an internal combustion engine
US8899208B2 (en) 2010-12-18 2014-12-02 Mahle International Gmbh Internal combustion engine piston having axially extending cooling bores
WO2016164873A1 (en) * 2015-04-09 2016-10-13 Federal-Mogul Corporation Design of zero oil cooled (zoc) piston incorporating heat pipe technology
WO2017032905A1 (en) * 2015-08-27 2017-03-02 Ks Kolbenschmidt Gmbh Piston of an internal combustion engine having alkali metal cooling and method for production thereof
WO2018149632A1 (en) * 2017-02-15 2018-08-23 Mahle International Gmbh Method for producing a piston

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DE102004038946A1 (en) * 2004-08-11 2006-02-23 Mahle International Gmbh Cooling channel piston for an internal combustion engine with heat pipes
DE102007050214A1 (en) * 2007-10-20 2009-04-23 Mahle International Gmbh Piston for an internal combustion engine
DE102007050213A1 (en) 2007-10-20 2009-04-23 Mahle International Gmbh Piston for an internal combustion engine
DE102012009030A1 (en) * 2012-05-05 2013-11-07 Mahle International Gmbh Arrangement of a piston and a crankcase for an internal combustion engine
DE102012017217A1 (en) 2012-08-31 2014-05-15 Mahle International Gmbh Piston for an internal combustion engine
DE102020213358A1 (en) 2020-10-22 2022-04-28 Federal-Mogul Nürnberg GmbH Pistons for an internal combustion engine with journal cooling

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DE726685C (en) * 1939-09-01 1942-10-19 Versuchsanstalt Fuer Luftfahrt Pistons for internal combustion engines
DE762820C (en) * 1943-04-25 1952-11-04 Richard Holzaepfel Fa Process for the manufacture of flasks with a temperature-compensating filling
FR2333962A1 (en) * 1975-12-01 1977-07-01 Kioritz Corp Reciprocating combustion engine piston - has low density high thermal conductivity material inside cylinder contacting piston wall
DE2930079A1 (en) * 1979-07-25 1981-03-12 Mahle Gmbh, 7000 Stuttgart IC engine liq-cooled piston - is of built-up construction and has inserted ring closing off cooling chamber above ring grooves
DE3017787A1 (en) * 1980-05-09 1981-11-12 Klöckner-Humboldt-Deutz AG, 5000 Köln IC engine piston with ceramic crown - has sheet metal discs interposed between skirt and crown to form piston ring recess

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Publication number Priority date Publication date Assignee Title
DE726685C (en) * 1939-09-01 1942-10-19 Versuchsanstalt Fuer Luftfahrt Pistons for internal combustion engines
DE762820C (en) * 1943-04-25 1952-11-04 Richard Holzaepfel Fa Process for the manufacture of flasks with a temperature-compensating filling
FR2333962A1 (en) * 1975-12-01 1977-07-01 Kioritz Corp Reciprocating combustion engine piston - has low density high thermal conductivity material inside cylinder contacting piston wall
DE2930079A1 (en) * 1979-07-25 1981-03-12 Mahle Gmbh, 7000 Stuttgart IC engine liq-cooled piston - is of built-up construction and has inserted ring closing off cooling chamber above ring grooves
DE3017787A1 (en) * 1980-05-09 1981-11-12 Klöckner-Humboldt-Deutz AG, 5000 Köln IC engine piston with ceramic crown - has sheet metal discs interposed between skirt and crown to form piston ring recess

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0176430A1 (en) * 1984-09-20 1986-04-02 Societe D'etudes De Machines Thermiques S.E.M.T. Method and device for controlling the internal cylinder surface temperature of an internal-combustion engine
FR2570439A1 (en) * 1984-09-20 1986-03-21 Semt METHOD AND DEVICE FOR REGULATING THE TEMPERATURE OF THE INTERNAL SURFACE OF CYLINDER SHAFTS OF AN INTERNAL COMBUSTION ENGINE
FR2905145A1 (en) * 2006-08-23 2008-02-29 Peugeot Citroen Automobiles Sa Piston for an automobile vehicle engine e.g. diesel engine, comprises a piston body having an outer side of combustion, an inner vault and a thermal short-circuit capable of deviating thermal flux from outer side towards the inner vault
EP3267022A1 (en) * 2009-11-10 2018-01-10 Federal-Mogul Corporation Piston with blow-by feature and method of preventing catastrophic failure to an internal combustion engine
WO2011060004A1 (en) * 2009-11-10 2011-05-19 Federal-Mogul Corporation Piston with blow-by feature and method of preventing catastrophic failure to an internal combustion engine
CN102597472A (en) * 2009-11-10 2012-07-18 费德罗-莫格尔公司 Piston with blow-by feature and method of preventing catastrophic failure to an internal combustion engine
US8635943B2 (en) 2009-11-10 2014-01-28 Federal-Mogul Corporation Piston with blow-by feature and method of preventing catastrophic failure to an internal combustion engine
CN102597472B (en) * 2009-11-10 2015-04-01 费德罗-莫格尔公司 Piston with blow-by feature and method of preventing catastrophic failure to an internal combustion engine
US8899208B2 (en) 2010-12-18 2014-12-02 Mahle International Gmbh Internal combustion engine piston having axially extending cooling bores
WO2016164873A1 (en) * 2015-04-09 2016-10-13 Federal-Mogul Corporation Design of zero oil cooled (zoc) piston incorporating heat pipe technology
CN107980079A (en) * 2015-04-09 2018-05-01 费德罗-莫格尔有限责任公司 It is associated with zero oil cooling of hot pipe technique but（ZOC）The design of piston
US10202936B2 (en) 2015-04-09 2019-02-12 Tenneco Inc. Zero oil cooled (ZOC) piston incorporating heat pipe technology
WO2017032905A1 (en) * 2015-08-27 2017-03-02 Ks Kolbenschmidt Gmbh Piston of an internal combustion engine having alkali metal cooling and method for production thereof
US10569325B2 (en) 2015-08-27 2020-02-25 Ks Kolbenschmidt Gmbh Piston of an internal combustion engine having alkali metal cooling and method for production thereof
WO2018149632A1 (en) * 2017-02-15 2018-08-23 Mahle International Gmbh Method for producing a piston

Also Published As

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DE3205173A1 (en) 1983-08-25
EP0086284B1 (en) 1986-10-15
JPS58148250A (en) 1983-09-03
DE3273824D1 (en) 1986-11-20

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