WO1999013209A1 - Piston built in three parts - Google Patents

Piston built in three parts Download PDF

Info

Publication number
WO1999013209A1
WO1999013209A1 PCT/DE1998/002488 DE9802488W WO9913209A1 WO 1999013209 A1 WO1999013209 A1 WO 1999013209A1 DE 9802488 W DE9802488 W DE 9802488W WO 9913209 A1 WO9913209 A1 WO 9913209A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
shaft
crown
parts
guide
Prior art date
Application number
PCT/DE1998/002488
Other languages
German (de)
French (fr)
Inventor
Reinhold Fuchs
Dietmar Zaiser
Original Assignee
Mahle 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
Application filed by Mahle Gmbh filed Critical Mahle Gmbh
Publication of WO1999013209A1 publication Critical patent/WO1999013209A1/en

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 
    • F02F3/0015—Multi-part pistons
    • F02F3/0069—Multi-part pistons the crown and skirt being interconnected by the gudgeon pin
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/04—Forging of engine parts
    • 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
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • 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 three-part piston according to the preamble of claim 1.
  • a piston is known from DE-OS 196 03 589.
  • the design of this piston is an articulated piston.
  • the invention is therefore concerned with the problem of avoiding complex shaping of the head part and of the shaft part in the case of the generic piston. This problem is solved by the characterizing features of claim 1. Advantageous further developments are the subject of the dependent claims.
  • the height of the guide is advantageously a maximum of 10% of the piston diameter.
  • Fig. 1 shows the piston according to the invention in cross section in the pressure-counter-pressure direction
  • Fig. 2 shows the piston according to the invention in cross section in the pin direction.
  • a piston 1 consists of a piston head 2, a lower part 3 with a lower part base, hubs and hub support and a shaft 4.
  • the piston head 2 and the lower part 3 are connected to one another with several screws 5 and set together represents a component that corresponds in shape to the upper part of an articulated piston, but has an inner cooling space 6 and an outer cooling channel 7, which are formed by corresponding inner contours when the piston crown 2 and lower part 3 are joined together.
  • the shaft 4 is connected to the lower part 3 only by means of a piston pin 9.
  • the piston crown 2 is guided in its lower region by the shaft 4 with a centering 8. This prevents tilting of the piston crown 2 relative to the shaft 4, the connection of the shaft 4 and the lower part 3 is not articulated.

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 built in three parts, in which the base and shaft are connected only by means of the piston pin in the manner of a pivoted piston. The aim of the invention is to avoid a complicated shape of the shaft and upper part. To this end the shaft has at its upper end a guide element for the piston base at least in the direction of pressure and counterpressure.

Description

Dreiteiliger gebauter Kolben Three-part piston
Die Erfindung betrifft einen dreiteiligen Kolben nach dem Oberbegriff des Anspruchs 1. Ein derartiger Kolben ist aus der DE-OS 196 03 589 bekannt. Dieser Kolben ist der Bauart nach ein Gelenkkolben.The invention relates to a three-part piston according to the preamble of claim 1. Such a piston is known from DE-OS 196 03 589. The design of this piston is an articulated piston.
Ein weiterer dreiteiliger Gelenkkolben ist aus der EP-PS 185 352 bekannt.Another three-part articulated piston is known from EP-PS 185 352.
Die Nachteile des in der DE-OS 196 03 589 beschriebenen Kolbens sind darin zu sehen, daß Schaft und Oberteil eine relativ komplizierte Formgebung aufweisen müssen, um die Kippbewegungen, die vom Kolbenbolzen auf das Oberteil wirken, abzufangen.The disadvantages of the piston described in DE-OS 196 03 589 can be seen in the fact that the shaft and upper part must have a relatively complicated shape in order to absorb the tilting movements which act on the upper part from the piston pin.
Ein weiterer Nachteil ist darin zu sehen, daß zwar bis zu Durchmessern von ca. 200 mm Werkzeugmaschinen zum Erzeugen komplizierter Kolbenformen verfügbar sind, oberhalb dieses Durchmesserbereichs jedoch noch keine Serien-Bearbeitungsmaschinen für z. B. triovale Schaftformen existieren.Another disadvantage is the fact that up to diameters of approx. 200 mm machine tools are available for producing complicated piston shapes, but above this diameter range no series machine tools for z. B. triovale shaft forms exist.
Die Erfindung beschäftigt sich daher mit dem Problem, bei dem gattungsgemäßen Kolben eine aufwendige Formgebung des Kopf- sowie des Schaftteils zu vermeiden. Dieses Problem wird gelöst durch die kennzeichnenden Merkmale des Anspruchs 1. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.The invention is therefore concerned with the problem of avoiding complex shaping of the head part and of the shaft part in the case of the generic piston. This problem is solved by the characterizing features of claim 1. Advantageous further developments are the subject of the dependent claims.
Durch die Führung des Kolbenbodens im Schaftteil kann auf eine komplizierte Formgebung beider Teile verzichtet werden. Im Vergleich mit konventionellen gebauten Kolben ergibt sich neben einer erhöhten Nabenbelastbarkeit der Vorteil, daß - in Kombination mit einem Aluminium-Schaft - ein geschmiedetes Unterteil verwendet werden kann, das erheblich kleiner ist als ein konventionelles Aluminium-Unterteil. Dies ist insofern von Vorteil, als ein kleineres Unterteil leichter durch Schmieden herstellbar ist.By guiding the piston head in the shaft part, a complicated shaping of both parts can be dispensed with. In comparison to conventional built pistons, in addition to increased hub load capacity, there is the advantage that - in combination with an aluminum shaft - a forged lower part can be used that is considerably smaller than a conventional aluminum lower part. This is advantageous in that a smaller lower part is easier to produce by forging.
Bei einer Ausführung nach Anspruch 2 ergibt sich, verglichen mit Unterteilen aus Gußeisen, außerdem der Vorteil, daß Werkstoff-Fehler besser vermieden werden können.In an embodiment according to claim 2, compared to lower parts made of cast iron, there is also the advantage that material defects can be better avoided.
Gemäß Anspruch 3 beträgt die Höhe der Führung vorteilhaft maximal 10 % des Kolbendurchmessers.According to claim 3, the height of the guide is advantageously a maximum of 10% of the piston diameter.
Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels dargestellt. Es zeigt:The invention is illustrated below using an exemplary embodiment. It shows:
Fig. 1 den erfindungsgemäßen Kolben im Querschnitt in Druck-Gegendruck-RichtungFig. 1 shows the piston according to the invention in cross section in the pressure-counter-pressure direction
Fig. 2 den erfindungsgemäßen Kolben im Querschnitt in Bolzenrichtung.Fig. 2 shows the piston according to the invention in cross section in the pin direction.
Ein Kolben 1 besteht aus einem Kolbenboden 2, einem Unterteil 3 mit Unterteilboden, Naben und Nabenabstützung und einem Schaft 4. Der Kolbenboden 2 und das Unterteil 3 sind mit mehreren Schrauben 5 miteinander verbunden und stellen gemeinsam ein Bauteil dar, das der Form nach dem Oberteil eines Gelenkkolbens entspricht, jedoch einen inneren Kühlraum 6 und einen äußeren Kühlkanal 7 aufweist, die beim Zusammenfügen von Kolbenboden 2 und Unterteil 3 durch entsprechende Innenkonturen gebildet werden.A piston 1 consists of a piston head 2, a lower part 3 with a lower part base, hubs and hub support and a shaft 4. The piston head 2 and the lower part 3 are connected to one another with several screws 5 and set together represents a component that corresponds in shape to the upper part of an articulated piston, but has an inner cooling space 6 and an outer cooling channel 7, which are formed by corresponding inner contours when the piston crown 2 and lower part 3 are joined together.
Der Schaft 4 ist wie bei Gelenkkolben nur durch einen Kolbenbolzen 9 mit dem Unterteil 3 verbunden. Der Kolbenboden 2 wird in seinem unteren Bereich vom Schaft 4 mit einer Zentrierung 8 geführt. Dadurch werden Kippbewegungen des Kolbenbodens 2 relativ zum Schaft 4 verhindert, die Verbindung von Schaft 4 und Unterteil 3 ist nicht gelenkig. As with articulated pistons, the shaft 4 is connected to the lower part 3 only by means of a piston pin 9. The piston crown 2 is guided in its lower region by the shaft 4 with a centering 8. This prevents tilting of the piston crown 2 relative to the shaft 4, the connection of the shaft 4 and the lower part 3 is not articulated.

Claims

Patentansprüche claims
1. Dreiteiliger gebauter Kolben (1) mit einem Kolbenboden aus geschmiedetem Stahl (2) und einem Unterteil (3) mit Unterteilboden, Naben und Nabenabstützung aus einem Eisenwerkstoff, das mit dem Kolbenboden (2) mittels Schrauben (5) verbunden ist und mit einem Schaft (4) aus einem Aluminiumwerkstoff, der mit dem Unterteil (3) nach Art eines Gelenkkolbens durch einen Kolbenbolzen verbunden ist, dadurch gekennzeichne , daß der Schaft (4) an seinem oberen Ende zumindest in Druck-Gegendruck-Richtung eine Führung für den Kolbenboden (2) aufweist.1. Three-part built piston (1) with a piston crown made of forged steel (2) and a lower part (3) with lower crown, hubs and hub support made of an iron material, which is connected to the piston crown (2) by means of screws (5) and with a Shaft (4) made of an aluminum material, which is connected to the lower part (3) in the manner of an articulated piston by a piston pin, characterized in that the shaft (4) has a guide for the piston crown at its upper end, at least in the pressure-counter-pressure direction (2).
2. Kolben nach Anspruch 1, dadurch gekennzeichne , daß das Unterteil (3) aus geschmiedetem Stahl besteht.2. Piston according to claim 1, characterized in that the lower part (3) consists of forged steel.
3. Kolben nach Anspruch 1 oder 2, dadurch gekennzeichne , daß die axiale Höhe der Führung maximal 0,1 D beträgt .3. Piston according to claim 1 or 2, characterized in that the axial height of the guide is a maximum of 0.1 D.
4. Kolben nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Führung als Zentrierung (8) des Kolbenbodens (2) im Schaft (4) ausgebildet ist. Kolben nach Anspruch 4, dadurch gekennzeichnet, daß die Zentrierung umlaufend ist.4. Piston according to claim 2 or 3, characterized in that the guide is formed as a centering (8) of the piston head (2) in the shaft (4). Piston according to claim 4, characterized in that the centering is circumferential.
Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichne „ daß er einen Durchmesser > 200 mm aufweist. Piston according to one of the preceding claims, characterized in that it has a diameter> 200 mm.
PCT/DE1998/002488 1997-09-09 1998-08-20 Piston built in three parts WO1999013209A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19739449A DE19739449A1 (en) 1997-09-09 1997-09-09 Three-part piston
DE19739449.3 1997-09-09

Publications (1)

Publication Number Publication Date
WO1999013209A1 true WO1999013209A1 (en) 1999-03-18

Family

ID=7841702

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/002488 WO1999013209A1 (en) 1997-09-09 1998-08-20 Piston built in three parts

Country Status (2)

Country Link
DE (1) DE19739449A1 (en)
WO (1) WO1999013209A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150059682A1 (en) * 2013-08-29 2015-03-05 Federal-Mogul Corporation Double welded steel piston with full skirt
KR20170134573A (en) * 2015-05-12 2017-12-06 바르실라 핀랜드 오이 A four-stroke internal combustion engine and a piston therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016209816A1 (en) * 2016-06-03 2017-12-07 Mahle International Gmbh Two-piece piston for an internal combustion engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE603581C (en) * 1932-12-31 1934-10-04 Richard Spryss Pistons for internal combustion engines
EP0185352A1 (en) 1984-12-20 1986-06-25 Societe D'etudes De Machines Thermiques S.E.M.T. Light-weight piston, especially for an internal-combustion engine
EP0225477A2 (en) * 1985-11-12 1987-06-16 Alcan Deutschland Gmbh Piston for internal combustion engines
US5070768A (en) * 1988-07-15 1991-12-10 Metal Leve S.A. Articulated piston
US5483869A (en) * 1995-05-26 1996-01-16 Caterpillar Inc. Sealed articulated piston
DE19603589A1 (en) 1996-02-01 1997-08-07 Kolbenschmidt Ag Pendulum shaft piston

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693280A (en) * 1925-11-16 1928-11-27 John C Leary Piston
US1745860A (en) * 1927-06-17 1930-02-04 Noble Warren Piston
FR885065A (en) * 1941-12-05 1943-09-03 Improvements to pistons, in particular for internal combustion engines
DE1476393A1 (en) * 1964-04-16 1969-04-24 Maschf Augsburg Nuernberg Ag Liquid-cooled piston
DE3241343A1 (en) * 1981-12-28 1983-07-07 Dana Corp., 43615 Toledo, Ohio PISTON FOR COMBUSTION ENGINES
DE3426238A1 (en) * 1984-07-17 1986-01-30 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen BUILT PISTON
DE3830033C2 (en) * 1987-11-30 1998-05-07 Mahle Gmbh Built, oil-cooled plunger for internal combustion engines
DE4007992A1 (en) * 1989-03-20 1990-09-27 Avl Verbrennungskraft Messtech Internal combustion engine piston - has separate top and bottom sections with chamber wall in bottom one

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE603581C (en) * 1932-12-31 1934-10-04 Richard Spryss Pistons for internal combustion engines
EP0185352A1 (en) 1984-12-20 1986-06-25 Societe D'etudes De Machines Thermiques S.E.M.T. Light-weight piston, especially for an internal-combustion engine
EP0225477A2 (en) * 1985-11-12 1987-06-16 Alcan Deutschland Gmbh Piston for internal combustion engines
US5070768A (en) * 1988-07-15 1991-12-10 Metal Leve S.A. Articulated piston
US5483869A (en) * 1995-05-26 1996-01-16 Caterpillar Inc. Sealed articulated piston
DE19603589A1 (en) 1996-02-01 1997-08-07 Kolbenschmidt Ag Pendulum shaft piston

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150059682A1 (en) * 2013-08-29 2015-03-05 Federal-Mogul Corporation Double welded steel piston with full skirt
US9702317B2 (en) * 2013-08-29 2017-07-11 Federal-Mogul Llc Double welded steel piston with full skirt
KR20170134573A (en) * 2015-05-12 2017-12-06 바르실라 핀랜드 오이 A four-stroke internal combustion engine and a piston therefor
KR102077376B1 (en) * 2015-05-12 2020-02-13 바르실라 핀랜드 오이 A four-stroke internal combustion engine and a piston therefor

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Publication number Publication date
DE19739449A1 (en) 1999-03-11

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