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EP1819920A1 - Piston for a combustion engine - Google Patents

Piston for a combustion engine

Info

Publication number
EP1819920A1
EP1819920A1 EP05815847A EP05815847A EP1819920A1 EP 1819920 A1 EP1819920 A1 EP 1819920A1 EP 05815847 A EP05815847 A EP 05815847A EP 05815847 A EP05815847 A EP 05815847A EP 1819920 A1 EP1819920 A1 EP 1819920A1
Authority
EP
European Patent Office
Prior art keywords
piston
ring element
base body
combustion engine
piston head
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
EP05815847A
Other languages
German (de)
French (fr)
Other versions
EP1819920B1 (en
Inventor
Rainer Scharp
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35911068&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1819920(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP1819920A1 publication Critical patent/EP1819920A1/en
Application granted granted Critical
Publication of EP1819920B1 publication Critical patent/EP1819920B1/en
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • 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 
    • 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 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • 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
    • 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 
    • F02F3/26—Pistons  having combustion chamber in piston head

Definitions

  • the invention relates to a piston for an internal combustion engine according to the preamble of claim.
  • a piston for an internal combustion engine in whose piston bottom side edge region a closed ring element is arranged, which is connected to the main body of the piston by means of a high temperature resistant adhesive, and its purpose is a hub side arranged for this purpose ring carrier To fix ceramic.
  • a ceramic material is chosen here for the purpose of utilizing this material's own thermal insulation effect and to reduce the temperature-induced expansion of the ring carrier, which is in contact with the thermally highly stressed ring element and thus is itself exposed to a very large thermal load.
  • this method of avoiding temperature-induced damage to the piston due to excessive thermal load of individual piston parts is very expensive and has the disadvantage of significantly increasing the cost of production of the piston.
  • the cooling channel which can be introduced in a simple manner between the piston main body and the ring element, ensures good cooling of both the ring spar tie as well as the thermally very highly loaded edge of the combustion bowl and thus for a high thermal load capacity of the piston according to the invention.
  • FIG. 1 shows a piston for an internal combustion engine with a ring element according to the invention in a two-half sectional image showing two offset by 90 ° longitudinal sections of the piston
  • Fig. 2 is an enlarged view of the section through the edge region of the piston crown with the ring element.
  • FIG. 1 shows a piston 1 for an internal combustion engine in a sectional view consisting of two halves, whose left half represents a section of the piston 1 along a longitudinal axis 2 of a hub bore 3 and the right half of which is offset by 90 ° relative to the piston 1.
  • the piston 1 consists of a substantially cylindrical base body 4, one end face of which forms the piston crown 5.
  • a closed ring element 6 is arranged in the central region of the piston head 5.
  • a combustion bowl 7 is formed in the central region of the piston head 5.
  • the base body 4 on its side facing away from the piston bottom 5 pin bosses 8 for the hub bores 3 and the pin bosses 8 interconnecting shaft elements 9.
  • the ring member 6 has on its radially outer circumferential surface 10 an annular groove 1 1 for a compression ring, not shown in the figure. Below this, a second annular groove 13 is arranged in the lateral surface 12 of the base body 4, followed by an oil ring groove 14 on the bolt hub side.
  • annular, closed cooling channel 15 is arranged, which partly by a molded-in in the base body 4 recess 16 and partly formed by a molded-in in the ring member 6 recess 17.
  • cooling oil is in the cooling passage 15 and derived from it again.
  • the base body 4 is made of aluminum, wherein initially in the forging process, a blank is produced, which is given by means of a machining production process (turning, milling) the final shape.
  • the ring element 6 is produced by casting from Niresist, wherein also first a blank is produced, which is given by means of a machining production process, the mold shown in Fig. 1.
  • Nires is an austenitic cast iron mixed with nickel, manganese, copper and chromium as alloy components.
  • the ring member 6 is connected to the base body 4 by means of a high temperature resistant adhesive.
  • FIG. 2 shows in an enlarged view the piston bottom side edge region of the piston 1 with the ring element 6, with the cooling channel 15 formed by the ring element 6 and the main body 4, and with the ring part 20 partly arranged in the ring element 6 and partly in the main body 4.

Landscapes

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

Abstract

Disclosed is a piston (1 ) for a combustion engine comprising a closed ring element (6) which is disposed in the radially outer peripheral area of the piston head (5) and is joined to the basic piston member (4) by means of a high-temperature resistant adhesive. The basic member (4) is made of forged aluminum while the ring element (6) is made of Ni-resist. A closed, annular cooling duct (15) that comprises holes for delivering and discharging cooling oil is placed between the basic member (4) and the ring element (6), resulting in a piston (1) that has a simple design, can be produced at low cost, and can be subjected to great thermal loads.

Description

Kolben für einen Verbrennungsmotor Piston for an internal combustion engine
Die Erfindung betrifft einen Kolben für einen Verbrennungsmotor nach dem Oberbegriff des Patentanspruches.The invention relates to a piston for an internal combustion engine according to the preamble of claim.
Aus der Offenlegungsschrift DE 37 14400 A1 ist ein Kolben für einen Verbrennungsmotor bekannt, in dessem kolbenbodenseitigen Randbereich ein geschlossenes Ringelement angeordnet ist, das mit dem Grundkörper des Kolbens mittels eines hochtemperaturfesten Klebstoffes verbunden ist, und dessen Zweck darin besteht, einen nabenseitig hierzu angeordneten Ringträger aus Keramik zu fixieren. Ein keramischer Werkstoff wird hierbei zu dem Zweck gewählt, die diesem Werkstoff eigene thermische Isolierwirkung zu nutzen und die temperaturbedingte Ausdehnung des Ringträgers zu reduzieren, der mit dem thermisch sehr hoch belasteten Ringelement in Kontakt steht und somit selber einer sehr großen thermischen Belastung ausgesetzt ist. Diese Methode zur Vermeidung temperaturbedingter Schäden des Kolbens aufgrund einer zu großen thermischen Belastung einzelner Kolbenteile ist jedoch sehr aufwendig und bringt den Nachteil mit sich, die Herstellung des Kolbens erheblich zu verteuern.From the patent application DE 37 14400 A1 a piston for an internal combustion engine is known, in whose piston bottom side edge region a closed ring element is arranged, which is connected to the main body of the piston by means of a high temperature resistant adhesive, and its purpose is a hub side arranged for this purpose ring carrier To fix ceramic. A ceramic material is chosen here for the purpose of utilizing this material's own thermal insulation effect and to reduce the temperature-induced expansion of the ring carrier, which is in contact with the thermally highly stressed ring element and thus is itself exposed to a very large thermal load. However, this method of avoiding temperature-induced damage to the piston due to excessive thermal load of individual piston parts is very expensive and has the disadvantage of significantly increasing the cost of production of the piston.
Hiervon ausgehend ist es Aufgabe der Erfindung, einen einfach aufgebauten, preisgünstig herstellbaren und thermisch hochbelastbaren Kolben zu schaffen.On this basis, it is an object of the invention to provide a simple design, inexpensive to produce and thermally highly resilient piston.
Gelöst wird diese Aufgabe mit den im Kennzeichen des Hauptanspruches stehenden Merkmalen.This problem is solved with the features in the characterizing part of the main claim.
Insbesondere der auf einfache Weise zwischen dem Kolbengrundkörper und dem Ringelement einbringbare Kühlkanal sorgt für eine gute Kühlung sowohl der Ringpar- tie als auch des thermisch sehr hochbelasteten Randes der Verbrennungsmulde und damit für eine hohe thermische Belastbarkeit des erfindungsgemäßen Kolbens.In particular, the cooling channel, which can be introduced in a simple manner between the piston main body and the ring element, ensures good cooling of both the ring spar tie as well as the thermally very highly loaded edge of the combustion bowl and thus for a high thermal load capacity of the piston according to the invention.
Ein Ausführungsbeispiel der Erfindung wird im Folgenden anhand der Zeichnungen beschrieben. Es zeigenAn embodiment of the invention will be described below with reference to the drawings. Show it
Fig. 1 einen Kolben für einen Verbrennungsmotor mit einem Ringelement gemäß der Erfindung in einem aus zwei Hälften bestehenden Schnittbild, das zwei um 90° versetzte Längsschnitte des Kolbens zeigt, und1 shows a piston for an internal combustion engine with a ring element according to the invention in a two-half sectional image showing two offset by 90 ° longitudinal sections of the piston, and
Fig. 2 eine vergrößerte Darstellung des Schnittes durch den Randbereich des Kolbenbodens mit dem Ringelement.Fig. 2 is an enlarged view of the section through the edge region of the piston crown with the ring element.
Fig. 1 zeigt einen Kolben 1 für einen Verbrennungsmotor in einem aus zwei Hälften bestehenden Schnittbild, dessen linke Hälfte einen Schnitt des Kolbens 1 entlang einer Längsachse 2 einer Nabenbohrung 3 und desssen rechte Hälfte einen um 90° dazu versetzten Schnitt durch den Kolben 1 darstellt.1 shows a piston 1 for an internal combustion engine in a sectional view consisting of two halves, whose left half represents a section of the piston 1 along a longitudinal axis 2 of a hub bore 3 and the right half of which is offset by 90 ° relative to the piston 1.
Der Kolben 1 besteht aus einem im Wesentlichen zylinderförmigen Grundkörper 4, dessen eine Stirnfläche den Kolbenboden 5 bildet. Im radial äußeren Bereich des Kolbenbodens 5 ist ein geschlossenes Ringelement 6 angeordnet. In den zentralen Bereich des Kolbenbodens 5 ist eine Verbrennungsmulde 7 eingeformt , deren Rand im Abstand vom Ringelement 6 im radial inneren Bereich des Kolbenbodens 5 angeordnet ist. Weiterhin weist der Grundkörper 4 auf seiner dem Kolbenboden 5 abgewandten Unterseite Bolzennaben 8 für die Nabenbohrungen 3 und die Bolzennaben 8 miteinander verbindende Schaftelemente 9 auf. Das Ringelement 6 weist auf seiner radial außen liegenden Mantelfläche 10 eine Ringnut 1 1 für einen in der Figur nicht dargestellten Verdichtungsring auf. Unterhalb hiervon ist in der Mantelfläche 12 des Grundkörpers 4 eine 2. Ringnut 13 angeordnet, woran sich bolzennabenseitig eine Ölringnut 14 anschließt.The piston 1 consists of a substantially cylindrical base body 4, one end face of which forms the piston crown 5. In the radially outer region of the piston head 5, a closed ring element 6 is arranged. In the central region of the piston head 5, a combustion bowl 7 is formed, whose edge is arranged at a distance from the ring member 6 in the radially inner region of the piston head 5. Furthermore, the base body 4 on its side facing away from the piston bottom 5 pin bosses 8 for the hub bores 3 and the pin bosses 8 interconnecting shaft elements 9. The ring member 6 has on its radially outer circumferential surface 10 an annular groove 1 1 for a compression ring, not shown in the figure. Below this, a second annular groove 13 is arranged in the lateral surface 12 of the base body 4, followed by an oil ring groove 14 on the bolt hub side.
Zwischen dem Ringelement 6 und dem kolbenbodenseitigen Bereich des Grundkörpers 4 ist ein ringförmiger, geschlossener Kühlkanal 15 angeordnet, der teils durch eine in den Grundkörper 4 eingeformte Ausnehmung 16 und teils durch eine in das Ringelement 6 eingeformte Ausnehmung 17 gebildet ist. Über in den Figuren nicht dargestellte Ölzu- und Ölablauf Öffnungen wird KühlÖl in den Kühlkanal 15 ein- und daraus wieder abgeleitet.Between the ring member 6 and the piston bottom side region of the base body 4, an annular, closed cooling channel 15 is arranged, which partly by a molded-in in the base body 4 recess 16 and partly formed by a molded-in in the ring member 6 recess 17. About not shown in the figures Ölzu- and oil drain holes cooling oil is in the cooling passage 15 and derived from it again.
Hergestellt wird der Grundkörper 4 aus Aluminium, wobei zunächst im Schmiedeverfahren ein Rohling hergestellt wird, dem mittels eines spanabhebenden Fertigungsverfahrens (Drehen, Fräsen) die endgültige Form gegeben wird.The base body 4 is made of aluminum, wherein initially in the forging process, a blank is produced, which is given by means of a machining production process (turning, milling) the final shape.
Das Ringelement 6 wird im Gießverfahren aus Niresist hergestellt, wobei ebenfalls zunächst ein Rohling hergestellt wird, dem mittels eines spanabhebenden Fertigungsverfahrens die in Fig. 1 dargestellte Form gegeben wird. Niresist in ein austeni- tisches Gusseisen, dem als Legierungsbestandteile Nickel, Mangan, Kupfer und Chrom beigemischt sind. Über die Kontaktbereiche 18 und 19 zwischen Grundkörper 4 und Ringelement 6 wird das Ringelement 6 mit dem Grundkörper 4 mittels eines hochtemperaturfesten Klebstoffes verbunden.The ring element 6 is produced by casting from Niresist, wherein also first a blank is produced, which is given by means of a machining production process, the mold shown in Fig. 1. Nires is an austenitic cast iron mixed with nickel, manganese, copper and chromium as alloy components. About the contact areas 18 and 19 between the base body 4 and ring member 6, the ring member 6 is connected to the base body 4 by means of a high temperature resistant adhesive.
Fig. 2 zeigt in einer vergrößerten Darstellung den kolbenbodenseitigen Randbereich des Kolbens 1 mit dem Ringelement 6, mit dem vom Ringelement 6 und dem Grundkörper 4 gebildeten Kühlkanal 15, und mit der teils im Ringelement 6 und teils im Grundkörper 4 angeordneten Ringpartie 20. 2 shows in an enlarged view the piston bottom side edge region of the piston 1 with the ring element 6, with the cooling channel 15 formed by the ring element 6 and the main body 4, and with the ring part 20 partly arranged in the ring element 6 and partly in the main body 4.
J Cl J Cl
BezuαszeichenlisteLIST OF REFERENCE NUMERALS
1 Kolben1 piston
2 Längsachse2 longitudinal axis
3 Nabenbohrung3 hub bore
4 Grundkörper4 main body
Kolbenbodenpiston crown
6 Ringelement6 ring element
7 Verbrennungsmulde7 combustion bowl
8 Bolzennaben8 pin hubs
9 Schaftelement9 shaft element
10 Mantelfläche des Ringelementes 610 lateral surface of the ring element. 6
11 Ringnut, Verdichtungsringnut11 annular groove, compression ring groove
12 Mantelfläche des Grundkörpers 412 lateral surface of the main body. 4
13 2. Ringnut13 2. Ring groove
14 Ölringnut14 oil ring groove
15 Kühlkanal15 cooling channel
16 Ausnehmung16 recess
17 Ausnehmung17 recess
18 Kontaktbereich18 contact area
19 Kontaktbereich 0 Ringpartie 19 contact area 0 ring section

Claims

Patentanspruch claim
1. Kolben (1 ) für einen Verbrennungsmotor1. piston (1) for an internal combustion engine
- mit einem einen Kolbenboden (5) aufweisenden Grundkörper (4),- With a piston head (5) having base body (4),
- mit auf der kolbenbodenabgewandten Seite des Grundkörpers (4) angeordneten Bolzennaben (8) und die Bolzennaben (8) miteinander verbindenden Schaftelementen (9) und- With arranged on the piston bottom side facing away from the base body (4) pin bosses (8) and the pin bosses (8) interconnecting shaft elements (9) and
- mit einem im radial äußeren Randbereich des Kolbenbodens (5) angeordneten, geschlossenen und mittels eines hochtemperaturfesten Klebstoffes mit dem Grundkörper (4) verbundenen Ringelement (6), dadurch gekennzeichnet,- With a in the radially outer edge region of the piston head (5) arranged, closed and by means of a high temperature resistant adhesive to the base body (4) connected to the ring element (6), characterized
- dass der Grundkörper (4) aus geschmiedetem Aluminium besteht,- that the base body (4) consists of forged aluminum,
- dass das Ringelement (6) aus Niresist besteht,- that the ring element (6) consists of Niresist,
- dass zwischen Grundkörper (4) und Ringelement (6) ein geschlossener, ringförmiger Kühlkanal (15) mit Öffnungen zum Ein- und Ausleiten von Kühlöl angeordnet ist, und- That between the base body (4) and ring element (6) is a closed, annular cooling channel (15) is arranged with openings for introducing and discharging cooling oil, and
- dass in den Kolbenboden (5) eine Verbrennungsmulde (7) eingeformt ist, deren Rand im Abstand vom Ringelement (6) im radial inneren Bereich des Kolbenbodens (5) angeordnet ist.- That in the piston head (5) a combustion bowl (7) is formed, the edge of which is arranged at a distance from the annular element (6) in the radially inner region of the piston head (5).
ERSATZBLATT SUBSTITUTE SHEET
EP05815847A 2004-11-30 2005-11-28 Piston for a combustion engine Revoked EP1819920B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004057558A DE102004057558A1 (en) 2004-11-30 2004-11-30 Piston for internal combustion engine has base component consisting of forged aluminum and ring element of ni-resist, with closed annular cooling passage located between base component and ring element
PCT/DE2005/002141 WO2006058522A1 (en) 2004-11-30 2005-11-28 Piston for a combustion engine

Publications (2)

Publication Number Publication Date
EP1819920A1 true EP1819920A1 (en) 2007-08-22
EP1819920B1 EP1819920B1 (en) 2008-04-30

Family

ID=35911068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05815847A Revoked EP1819920B1 (en) 2004-11-30 2005-11-28 Piston for a combustion engine

Country Status (9)

Country Link
US (1) US20080121205A1 (en)
EP (1) EP1819920B1 (en)
JP (1) JP2008522086A (en)
KR (1) KR20070095918A (en)
CN (1) CN101069008A (en)
BR (1) BRPI0518705A2 (en)
DE (2) DE102004057558A1 (en)
ES (1) ES2306256T3 (en)
WO (1) WO2006058522A1 (en)

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Also Published As

Publication number Publication date
DE102004057558A1 (en) 2006-06-01
DE502005003924D1 (en) 2008-06-12
US20080121205A1 (en) 2008-05-29
CN101069008A (en) 2007-11-07
BRPI0518705A2 (en) 2008-12-02
EP1819920B1 (en) 2008-04-30
ES2306256T3 (en) 2008-11-01
JP2008522086A (en) 2008-06-26
KR20070095918A (en) 2007-10-01
WO2006058522A1 (en) 2006-06-08

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