DE3516308A1 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine

Info

Publication number
DE3516308A1
DE3516308A1 DE19853516308 DE3516308A DE3516308A1 DE 3516308 A1 DE3516308 A1 DE 3516308A1 DE 19853516308 DE19853516308 DE 19853516308 DE 3516308 A DE3516308 A DE 3516308A DE 3516308 A1 DE3516308 A1 DE 3516308A1
Authority
DE
Germany
Prior art keywords
piston
slide
heat shielding
plate
combustion engine
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.)
Granted
Application number
DE19853516308
Other languages
German (de)
Other versions
DE3516308C2 (en
Inventor
Karlheinz Dr.-Ing. 7000 Stuttgart Holzemer
Michael von Dipl.-Ing. 7056 Weinstadt Mayenburg
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE19853516308 priority Critical patent/DE3516308A1/en
Publication of DE3516308A1 publication Critical patent/DE3516308A1/en
Application granted granted Critical
Publication of DE3516308C2 publication Critical patent/DE3516308C2/de
Granted 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 
    • F02F3/02—Pistons  having means for accommodating or controlling heat expansion
    • F02F3/04—Pistons  having means for accommodating or controlling heat expansion having expansion-controlling inserts
    • F02F3/045—Pistons  having means for accommodating or controlling heat expansion having expansion-controlling inserts the inserts being located in the crown
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins

Landscapes

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

Abstract

The invention relates to a piston for an internal combustion engine with piston bosses arranged beneath the piston head plate, between which bosses a slideway for supporting a double T-shaped piston pin extends as an extension of the upper boss sections. In order to prevent excessive heating of the slideway, at least one heat shield element is arranged in the piston head plate.

Description

Beschreibung description

Die Erfindung bezieht sich auf einen Kolben für eine Brennkraftmaschine mit zwei unterhalb der Kolbenbodenplatte angeordneten Kolbenaugen gemäß Oberbegriff des Patentanspruches 1. The invention relates to a piston for an internal combustion engine with two piston eyes arranged below the piston head plate according to the preamble of claim 1.

Bei einem bekannten Kolben der vorstehend genannten Art (DE-OS 33 31 390) ist die Gleitbahn zur Abstützung des Kolbenbodens am Doppel-T-förmigen Kolbenbolzen an der Innenseite der Kolbenbodenplatte angeformt. Dadurch wird die vom Kolben aufgenommene Verbrennungswärme direkt zur Gleitbahn hingeleitet. In a known piston of the type mentioned above (DE-OS 33 31 390) is the slide to support the piston crown on the double-T-shaped piston pin molded onto the inside of the piston head plate. This is the one picked up by the piston Heat of combustion conducted directly to the slideway.

Aufgrund der hohen Verbrennungstemperaturen kann es dabei zu Verkokungen des Schmieröles im Bereich der Gleitbahn kommen.Due to the high combustion temperatures, coking can occur of the lubricating oil come in the area of the slideway.

Der Erfindung liegt daher die Aufgabe zugrunde, den bekannten Kolben so auszubilden, daß eine übermäßige Erwärmung der Gleitbahn verhindert wird. Die Aufgabe ist erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruches 1 angegebenen Merkmale gelöst. The invention is therefore based on the object of the known piston to train so that excessive heating of the slide is prevented. the The object is according to the invention by the characterizing part of the claim 1 specified features solved.

Durch die Anordnung von Wärmeabschirmelementen in der Kolbenbodenplatte ist die Gleitbahn gegen den vom Kolbenboden ausgehenden Wärmestrom wirksam geschützt, da der Wärmestrom an den Wärmeabschirmelementen abgefangen und von der Gleitbahn weg in Richtung des Kolbenhemdes umgelenkt wird. By arranging heat shielding elements in the piston head plate the slide is effectively protected against the heat flow from the piston crown, because the heat flow is intercepted at the heat shielding elements and by the slide is deflected away in the direction of the piston skirt.

Durch die Wärmeabschirmelemente können die Temperaturen an der Gleitbahn derart verringert werden, daß die Gefahr einer Verkokung des Schmierölfilmes an der Gleitbahn nicht mehr besteht.The temperatures on the sliding track can be reduced by the heat shielding elements can be reduced in such a way that the risk of coking of the lubricating oil film the slide no longer exists.

Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Further refinements of the invention are the subject of the subclaims.

In der Zeichnung sind zwei Ausführungsbeispiele der Erfindung dargestellt. Two exemplary embodiments of the invention are shown in the drawing.

Es zeigen: Fig. 1 im Längsschnitt einen Kolben mit in der Bodenplatte eingegossener Keramikplatte als Wärmeab- schirmelement, Fig. 2 im Längsschnitt einen Kolben mit in der Bodenplatte angeordneten Hohlräumen als Wärmeabschirmelemente. They show: FIG. 1 in longitudinal section a piston with in the base plate cast ceramic plate as heat dissipation shield element, Fig. 2 in a longitudinal section Pistons with cavities arranged in the base plate as heat shielding elements.

In Fig. 1 ist mit 1 ein Kolben bezeichnet, dessen Kolbenboden 2 mit einer Brennraummulde 3 versehen ist. In Fig. 1, 1 designates a piston, the piston head 2 with a combustion bowl 3 is provided.

Der Kolbenboden 2 bildet die Oberfläche einer Kolbenbodenplatte 2a, an deren Innenseite 4 vom Kolbenhemd 5 seitlich begrenzte Bolzenaugen 6 und 7 zur Aufnahme eines Doppel-T-förmigen Kolbenbolzens angeformt sind. Zwischen den Bolzenaugen 6 und 7 erstreckt sich in Verlängerung der zum Kolbenboden 2 hin kreisbogenförmig gekrümmte Augenabschnitten 8 und 9 eine Gleitbahn 10, über die sich die Kolbenbodenplatte 2a am Kolbenbolzen abstützt. Um zu verhindern, daß die von der Bodenplatte 2a aufgenommene Wärme unmittelbar zur Gleitbahn 10 strömen kann, ist in der Bodenplatte 2a mit Abstand von der Gleitbahn 10 eine diese zum Kolbenboden 2 hin abschirmende Keramikplatte 11 als Wärmeabschirmelement eingegossen. Die Keramikplatte 11 erstreckt sich über die gesamte Länge der Gleitbahn 10 und zumindest über einen Teil der Augenabschnitte 8 und 9, so daß ebenfalls diese Bereiche gegen eine zu starke Erwärmung geschützt sind. In Längsrichtung der Kolbenaugen 6 und 7 gesehen ist die Keramikplatte 11 zum Kolbenboden 2 hin vorgewölbt ausgebildet, wodurch eine gute seitliche Ablenkung des Wärmestromes erzielt wird.The piston head 2 forms the surface of a piston head plate 2a, on the inside 4 of the piston skirt 5 laterally limited bolt eyes 6 and 7 for Receiving a double-T-shaped piston pin are integrally formed. Between the bolt eyes 6 and 7 extends in the form of an arc of a circle as an extension of the piston head 2 curved eye sections 8 and 9 form a slide 10 over which the piston head plate 2a is supported on the piston pin. In order to prevent the received from the bottom plate 2a Heat can flow directly to the slideway 10 is in the base plate 2a at a distance from the slide 10 a ceramic plate shielding it from the piston head 2 11 cast as a heat shielding element. The ceramic plate 11 extends over the entire length of the slide 10 and at least over part of the eye sections 8 and 9, so that these areas are also protected against excessive heating are. The ceramic plate 11 is seen in the longitudinal direction of the piston bosses 6 and 7 formed bulging towards the piston head 2, whereby a good lateral deflection the heat flow is achieved.

Der im Ausführungsbeispiel gemäß Fig. 2 dargestellte Kolben 12 besitzt anstelle einer Keramikplatte als Wärmeabschirmelement einen oder mehrere in der Kolbenbodenplatte 13 angeordnete Hohlräume 14. Die Hohlräume 14 erstrecken sich quer zur Längsachse der Kolbenaugen 15 mit Abstand über die Gleitbahn 16 hinweg und münden jeweils in den Kolbeninnenraum 17. Dabei zeigen die Hohlräume 14 über der Gleitbahn 16 einen bogenförmigen Verlauf. The piston 12 shown in the exemplary embodiment according to FIG. 2 has instead of a ceramic plate as a heat shielding element, one or more in the Piston bottom plate 13 arranged cavities 14. The cavities 14 extend transversely to the longitudinal axis of the piston bosses 15 at a distance across the slide 16 and each open into the piston interior 17. The cavities 14 point over the slide 16 has an arcuate course.

- Leerseite -- blank page -

Claims (5)

Patentansprüche 1. Kolben für eine Brennkraftmaschine mit zwei unterhalb der Kolbenbodenplatte angeordneten Kolbenaugen, zwischen denen sich in Verlängerung der zum Kolbenboden kreisbogenförmig vorgewölbten Augenabschnitten eine Gleitbahn für einen Doppel-T-förmigen Kolbenbolzen erstreckt, dadurch gekennzeichnet, daß in der Kolbenbodenplatte (2a, 13) mindestens ein Wärmeabschirmelement 14) angeordnet ist.Claims 1. Pistons for an internal combustion engine with two below the piston head plate arranged piston eyes, between which there is an extension the eye sections protruding in the shape of a circular arc to the piston crown form a slide for a double-T-shaped piston pin, characterized in that at least one heat shielding element 14) is arranged in the piston base plate (2a, 13) is. 2. Kolben nach Anspruch 1, dadurch gekennzeichnet, daß das Wärmeabschirmelement durch eine in die Kolbenbodenplatte (2a) eingegossene und zumindest die Gleitbahn (10) mit Abstand überdekkende Keramikplatte (11) gebildet ist. 2. Piston according to claim 1, characterized in that the heat shielding element by one cast in the piston bottom plate (2a) and at least the slide (10) ceramic plate (11) covering a distance is formed. 3. Kolben nach Anspruch 1 oder 2, dadurch gekennzeichnet daß die Keramikplatte (11) quer zur Längsachse der Kolbenaugen (6, 7) gewölbt ausgebildet ist 3. Piston according to claim 1 or 2, characterized in that the Ceramic plate (11) curved transversely to the longitudinal axis of the piston eyes (6, 7) is 4. Kolben nach Anspruch 1, dadurch gekennzeichnet, daß das Wärmeabschirmelement aus einem oder mehreren quer zur Längsachse der Kolbenaugen (15) mit Abstand über der Gleitbahn (16) hinweg verlaufenden und in den Kolbeninnenraum (17) mündenden Hohlräumen (14) besteht.4. Piston according to claim 1, characterized in that the heat shielding element from one or more transversely to the longitudinal axis of the piston bosses (15) at a distance above the sliding path (16) extending away and opening into the piston interior (17) There are cavities (14). 5. Kolben nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß die Hohlräume (14) über der Gleitbahn (16) bogenförmig verlaufen. 5. Piston according to claim 1 or 4, characterized in that the Cavities (14) extend arcuately over the slide (16).
DE19853516308 1985-05-07 1985-05-07 Piston for an internal combustion engine Granted DE3516308A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853516308 DE3516308A1 (en) 1985-05-07 1985-05-07 Piston for an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853516308 DE3516308A1 (en) 1985-05-07 1985-05-07 Piston for an internal combustion engine

Publications (2)

Publication Number Publication Date
DE3516308A1 true DE3516308A1 (en) 1986-11-13
DE3516308C2 DE3516308C2 (en) 1992-07-23

Family

ID=6269993

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853516308 Granted DE3516308A1 (en) 1985-05-07 1985-05-07 Piston for an internal combustion engine

Country Status (1)

Country Link
DE (1) DE3516308A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3609752A1 (en) * 1986-03-22 1987-10-01 Kloeckner Humboldt Deutz Ag THERMALLY INSULATED PISTON
DE19510050A1 (en) * 1995-03-20 1996-09-26 Mahle Gmbh Lightweight, cast piston for IC engine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB530570A (en) * 1939-06-09 1940-12-16 Frank Hunter Clayton Improvements in and relating to pistons for internal combustion engines and the like
DE1047527B (en) * 1957-10-25 1958-12-24 Karl Schmidt Ges Mit Beschraen Light metal pistons for mixture-lubricated two-stroke internal combustion engines
DE1053243B (en) * 1955-07-08 1959-03-19 Chicago Railway Equipment Comp Pistons for internal combustion engines
CH346726A (en) * 1955-11-05 1960-05-31 Schmidt Gmbh Karl Light metal pistons for internal combustion engines with a preformed and cast-in combustion chamber lining
CH425338A (en) * 1965-08-09 1966-11-30 Tsni Dizelny I Pistons for internal combustion engines
DE2253961B2 (en) * 1972-03-01 1977-08-11 TRW Inc, Cleveland, Ohio (VStA) TWO-PIECE METAL PISTON FOR COMBUSTION MACHINERY
DE3331300A1 (en) * 1983-08-31 1985-03-14 Kolbenschmidt AG, 7107 Neckarsulm PISTON CONNECTING ROD ARRANGEMENT

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB530570A (en) * 1939-06-09 1940-12-16 Frank Hunter Clayton Improvements in and relating to pistons for internal combustion engines and the like
DE1053243B (en) * 1955-07-08 1959-03-19 Chicago Railway Equipment Comp Pistons for internal combustion engines
CH346726A (en) * 1955-11-05 1960-05-31 Schmidt Gmbh Karl Light metal pistons for internal combustion engines with a preformed and cast-in combustion chamber lining
DE1047527B (en) * 1957-10-25 1958-12-24 Karl Schmidt Ges Mit Beschraen Light metal pistons for mixture-lubricated two-stroke internal combustion engines
CH425338A (en) * 1965-08-09 1966-11-30 Tsni Dizelny I Pistons for internal combustion engines
DE2253961B2 (en) * 1972-03-01 1977-08-11 TRW Inc, Cleveland, Ohio (VStA) TWO-PIECE METAL PISTON FOR COMBUSTION MACHINERY
DE3331300A1 (en) * 1983-08-31 1985-03-14 Kolbenschmidt AG, 7107 Neckarsulm PISTON CONNECTING ROD ARRANGEMENT

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3609752A1 (en) * 1986-03-22 1987-10-01 Kloeckner Humboldt Deutz Ag THERMALLY INSULATED PISTON
DE3609752C2 (en) * 1986-03-22 1989-06-22 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln, De
DE19510050A1 (en) * 1995-03-20 1996-09-26 Mahle Gmbh Lightweight, cast piston for IC engine

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Publication number Publication date
DE3516308C2 (en) 1992-07-23

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings
8305 Restricted maintenance of patent after opposition
D4 Patent maintained restricted
8330 Complete disclaimer