EP1105665A1 - Piston for internal combustion engines - Google Patents

Piston for internal combustion engines

Info

Publication number
EP1105665A1
EP1105665A1 EP99938369A EP99938369A EP1105665A1 EP 1105665 A1 EP1105665 A1 EP 1105665A1 EP 99938369 A EP99938369 A EP 99938369A EP 99938369 A EP99938369 A EP 99938369A EP 1105665 A1 EP1105665 A1 EP 1105665A1
Authority
EP
European Patent Office
Prior art keywords
piston
light metal
piston pin
rolled
bush
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Withdrawn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
EP99938369A
Other languages
German (de)
French (fr)
Inventor
Harald Pfestorf
Siegfied Mielke
Werner Landvatter
Emmerich Ottliczky
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.)
KS Kolbenschmidt GmbH
Original Assignee
KS Kolbenschmidt 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 KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP1105665A1 publication Critical patent/EP1105665A1/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Withdrawn legal-status Critical Current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 
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y10T29/49266—Gudgeon pin, wrist pin, piston pin, or boss therefor

Abstract

The invention relates to a light metal piston for internal combustion engines, with bearing bushes (4) placed in piston pin bores (2) of the pin hubs for the piston pin through which said piston is drivingly connected to the motor drive rod. In order to improve the tight fit of said bushes (4) in the piston pin bores, the piston is built in such a way that said bearing bush (4) is a bush wound from a laminated strip- or band shaped metallic material, which has a joint (6) that is closed in a compressed condition, and said wound bush exhibits a preferential orientation of the metallurgical grains thereof in a peripheral direction.

Description

Titel: Kolben für VerbrennungskraftmaschinenTitle: Pistons for internal combustion engines
Beschreibungdescription
Die Erfindung betrifft einen Leichtmetallkolben für Verbrennungskraftmaschinen, mit in Kolbenbolzenbohrungen der Bolzennaben eingesetzten Lagerbuchsen für den Kolbenbolzen, über den der Kolben mit der Pleuelstange des Motors in Antriebsverbindung steht .The invention relates to a light metal piston for internal combustion engines, with bearing bushes for the piston pin inserted in piston pin bores of the pin hubs, via which the piston is in drive connection with the connecting rod of the engine.
Die Lagerbuchsen bekannter Leichtmetallkolben, wie beispielsweise in DE 39 32 563 A 1 beschrieben, sind gedrehte von einem gepressten Rohr abgestochene Abschnitte. Ein dauerhafter Festsitz der Lagerbuchsen in der Kolbenbolzenbohrung erweist sich gelegentlich als problematisch . Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, den Festsitz von Lagerbuchsen in der Kolbenbolzenbohrung zu verbessern.The bearing bushes of known light metal pistons, as described, for example, in DE 39 32 563 A 1, are turned sections cut off from a pressed tube. A permanent tight fit of the bearing bushes in the piston pin bore sometimes proves to be problematic. Proceeding from this, the object of the present invention is to improve the tight fit of bearing bushes in the piston pin bore.
Dies wird bei einem Leichtmetallkolben der eingangs beschriebenen Art erfindungsgemäß dadurch erreicht, dass die Lagerbuchse eine aus einem gewalzten streifen- oder bandförmigen Metallmaterial gerollte Buchse ist, die eine im eingepressten Zustand geschlossene Stoßfuge aufweist und dass in der Buchse eine Vorzugsorientierung der metallurgischen Kornbereiche in Umfangsrichtung ausgebildet ist .This is achieved according to the invention in the case of a light metal piston of the type described in the introduction in that the bearing bush is a bush rolled from a rolled strip or strip-shaped metal material, which has a butt joint which is closed in the pressed-in state, and in that a preferential orientation of the metallurgical grain regions in the circumferential direction is formed in the bush is.
Es wurde mit der Erfindung festgestellt, dass Lockerungserscheinungen der Lagerbuchse bei Verwendung einer gerollten Lagerbuchse der vorstehend beschriebenen Art nicht mehr auftreten. Die Dauerhaftigkeit des Festsitzes ist bei gerollten Buchsen mit in Umfangsrichtung der Buchse orientierter Ausrichtung der metallurgischen Kornbereiche wesentlich erhöht. Die Vorzugsorientierung der metallurgischen Kornbereiche wird erfindungsgemäß dadurch erreicht, dass bei der Herstellung der Lagerbuchse das streifen- oder bandförmige Metallmaterial derart orientiert wird, dass die Umfangsrichtung der herzustellenden Lagerbuchse mit der Walzrichtung des Metallmaterials übereinstimmt . Es erweist sich desweiteren als besonders vorteilhaft, wenn die Buchse derart in der Kolbenbolzenbohrung orientiert ist, dass die Stoßfuge in Kolbenbolzenlängsrichtung betrachtet in der dem Schaftende des Kolbens zugewandten Hälfte der Kolbenbolzenbohrung, vorzugsweise im Segment zwischen 130 und 180 Grad, insbesondere zwischen 130 und 150 Grad angeordnet ist. Es erweist sich ferner als vorteilhaft, wenn die Stoßfuge auf der Gegendruckseite (GDS) des Kolbens zu liegen kommt .It was found with the invention that signs of loosening of the bearing bush no longer occur when using a rolled bearing bush of the type described above. The durability of the tight fit is considerably increased in the case of rolled bushings with the metallurgical grain regions oriented in the circumferential direction of the bushing. The preferred orientation of the metallurgical grain areas is achieved according to the invention in that the strip-like or band-shaped metal material is oriented in the manufacture of the bearing bush in such a way that the circumferential direction of the bearing bush to be manufactured corresponds to the rolling direction of the metal material. It also proves to be particularly advantageous if the bushing is oriented in the piston pin bore such that the butt joint, viewed in the longitudinal direction of the piston pin, in the half of the piston pin bore facing the shaft end of the piston, preferably in the segment between 130 and 180 degrees, in particular between 130 and 150 degrees is arranged. It also proves to be advantageous if the butt joint comes to rest on the counter pressure side (GDS) of the piston.
Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen .Preferred developments of the invention result from the subclaims.
In der Zeichnung zeigt :The drawing shows:
Figur 1 eine Seitenansicht eines erfindungsgemäßenFigure 1 is a side view of an inventive
Leichtmetallkolbens mit eingedehnter gerollter Lagerbuchse ; undLight alloy piston with extended rolled bearing bush; and
Figur 2-4 verschiedene Ansichten der Lagerbuchse nach Figur 1.Figure 2-4 different views of the bearing bush of Figure 1.
Figur 1 zeigt einen Leichtmetallkolben aus einer Aluminium- Silizium-Legierung mit 7 bis 25 Gew.% Silizium. In die Kolbenbolzenbohrungen 2 ist je eine Lagerbuchse 4 eingesetzt, die Lagerbuchse wurde durch flüssigen Stickstoff sehr stark unterkühlt und dann in die Kolbenbolzenbohrung 2 eingesetzt. Bei der Lagerbuchse 4 handelt es sich um eine gerollte Buchse mit einer Stoßfuge 6. Die Buchse 4 ist aus einem gewalzten streifen- bzw. bandförmigen Lagermaterial in Form einer CuZn31Si-Legierung hergestellt, wobei das Metallmaterial derart orientiert wird, dass die Walzrichtung mit der Umfangsrichtung der Lagerbuchse 4 übereinstimmt. Die gerollte Buchse 4 weist am einen Stoßabschnitt 8 eine Ausnehmung 10 und am anderen Stoßabschnitt 12 eine komplementär zur Ausnehmung 10 ausgebildete Zunge 14 auf. Im eingedehnten Zustand ist die Stoßfuge 6 geschlossen. Mit dem Bezugszeichen 15 ist eine Ausnehmung bezeichnet, durch welche später ein Sprengring ausgehoben werden kann, der in eine noch einzudrehende Nut eingesetzt ist, um den Kolbenbolzen axial zu sichern.FIG. 1 shows a light metal piston made of an aluminum-silicon alloy with 7 to 25% by weight of silicon. A bearing bush 4 is inserted into each of the piston pin bores 2, the bearing bush was supercooled by liquid nitrogen and then inserted into the piston pin bore 2. The bearing bush 4 is a rolled bush with a butt joint 6. The bush 4 is made from a rolled strip or strip-shaped bearing material in the form of a CuZn31Si alloy, the metal material being oriented such that the rolling direction is circumferential the bearing bush 4 matches. The rolled bushing 4 has a recess 10 on one butt section 8 and a tongue 14 formed on the other butt section 12 complementary to the recess 10. In the expanded state, the butt joint 6 is closed. The reference numeral 15 designates a recess through which a snap ring can later be lifted, which is inserted into a groove to be screwed in, in order to axially secure the piston pin.
Wie sich der Figur 1 entnehmen lässt, ist die Buchse derart in der Kolbenbolzenbohrung 2 orientiert, dass ihre Stoßfuge in Kolbenbolzenlängsrichtung betrachtet im Segment 16 zwischen 130 und 150 Grad zur Kolbenlängsrichtung auf der Gegendruckseite GDS angeordnet ist. As can be seen in FIG. 1, the bushing is oriented in the piston pin bore 2 such that its butt joint, viewed in the piston pin longitudinal direction, is arranged in the segment 16 between 130 and 150 degrees to the piston longitudinal direction on the counterpressure side GDS.

Claims

Patentansprüche claims
1. Leichtmetallkolben für Verbrennungskraftmaschinen, mit in Kolbenbolzenbohrungen (2) der Bolzennaben eingesetzten Lagerbuchsen (4) für den Kolbenbolzen, über den der Kolben mit der Pleuelstange des Motors in Antriebsverbindung steht, dadurch gekennzeichnet, dass die Lagerbuchse (4) eine aus einem gewalzten Streifenoder bandförmigen Metallmaterial gerollte Buchse ist, die eine im eingepressten Zustand geschlossene Stoßfuge (6) aufweist und dass in der Buchse eine Vorzugsorientierung der metallurgischen Kornbereiche in Umfangsrichtung ausgebildet ist.1.Light metal piston for internal combustion engines, with bearing bushes (4) for the piston pin inserted in piston pin bores (2) of the pin hubs, via which the piston is in drive connection with the connecting rod of the engine, characterized in that the bearing bush (4) is made of a rolled strip or band-shaped metal material is rolled bushing, which has a butt joint (6) closed in the pressed-in state and that a preferential orientation of the metallurgical grain areas in the circumferential direction is formed in the bushing.
2. Leichtmetallkolben nach Anspruch 1, dadurch gekennzeichnet, dass die Buchse (4) derart in der Kolbenbolzenbohrung (2) orientiert ist, dass die Stoßfuge (6) in Kolbenbolzenlängsrichtung betrachtet in der dem Schaftende des Kolbens zugewandten Hälfte der Kolbenbolzenbohrung angeordnet ist.2. Light metal piston according to claim 1, characterized in that the bushing (4) is oriented in the piston pin bore (2) such that the butt joint (6), viewed in the longitudinal direction of the piston pin, is arranged in the half of the piston pin bore facing the shaft end of the piston.
3. Leichtmetallkolben nach Anspruch 2, dadurch gekennzeichnet, dass die Buchse (4) derart in der Kolbenbolzenbohrung (2) orientiert ist, dass die Stoßfuge (6) in Kolbenbolzenlängsrichtung betrachtet im Segment (16) zwischen 130 und 180 Grad vorzugsweise zwischen 130 und 150 Grad zur Kolbenlängsrichtung angeordnet ist.3. Light metal piston according to claim 2, characterized in that the bushing (4) is oriented in the piston pin bore (2) in such a way that the butt joint (6) in the piston pin longitudinal direction, preferably in the segment (16) between 130 and 180 degrees is arranged between 130 and 150 degrees to the piston longitudinal direction.
4. Leichtmetallkolben nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Wandstärke der gerollten Buchse4. Light metal piston according to claim 1, 2 or 3, characterized in that the wall thickness of the rolled bushing
(4) 4-8-% des Innendurchmessers der Kolbenbolzenbohrung (2) beträgt.(4) is 4-8% of the inside diameter of the piston pin bore (2).
5. Leichtmetallkolben nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die gerollte Buchse (4) am einen Stoßabschnitt (8) eine Ausnehmung5. Light metal piston according to one of the preceding claims, characterized in that the rolled bush (4) on a butt section (8) has a recess
(10) und am anderen Stoßabschnitt (12) eine zu der Ausnehmung (10) komplementäre Zunge (14) , die ineinandergreifen .(10) and on the other joint section (12) a tongue (14) which is complementary to the recess (10) and which interlock.
6. Leichtmetallkolben nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die gerollte Buchse (4) in die Kolbenbolzenbohrung (2) bei Untertemperatur eingedehnt ist.6. Light metal piston according to one of the preceding claims, characterized in that the rolled bush (4) in the piston pin bore (2) is stretched at low temperature.
7. Leichtmetallkolben nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die gerollte Buchse (4) aus einer Kupfer-Zink-Legierung hergestellt ist . Leichtmetallkolben nach Anspruch 7, dadurch gekennzeichnet, dass die Kupfer-Zink-Legierung eine CuZn31Si-Legierung ist. 7. Light metal piston according to one of the preceding claims, characterized in that the rolled bush (4) is made of a copper-zinc alloy. Light metal piston according to claim 7, characterized in that the copper-zinc alloy is a CuZn31Si alloy.
EP99938369A 1998-08-19 1999-07-29 Piston for internal combustion engines Withdrawn EP1105665A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19837596A DE19837596C1 (en) 1998-08-19 1998-08-19 Light-metal piston for internal combustion engine
DE19837596 1998-08-19
PCT/EP1999/005422 WO2000011377A1 (en) 1998-08-19 1999-07-29 Piston for internal combustion engines

Publications (1)

Publication Number Publication Date
EP1105665A1 true EP1105665A1 (en) 2001-06-13

Family

ID=7878014

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99938369A Withdrawn EP1105665A1 (en) 1998-08-19 1999-07-29 Piston for internal combustion engines

Country Status (5)

Country Link
US (1) US6345599B1 (en)
EP (1) EP1105665A1 (en)
BR (1) BR9911345A (en)
DE (1) DE19837596C1 (en)
WO (1) WO2000011377A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7129346B2 (en) * 2000-12-20 2006-10-31 Molecular Probes, Inc. Crown ether derivatives
DE102007027329A1 (en) 2007-06-14 2008-12-24 Ks Kolbenschmidt Gmbh Internal combustion engine piston made of light metal, has piston upper part that has combustion chamber cavity in area of piston base where ring area is provided, outside for receiving piston rings
DE102008051089A1 (en) 2007-10-23 2009-04-30 Ks Kolbenschmidt Gmbh Bolts hub of a piston
DE202009010802U1 (en) 2009-08-11 2009-10-15 Ks Kolbenschmidt Gmbh Piston pin bearing bush
USD737861S1 (en) * 2009-10-30 2015-09-01 Caterpillar Inc. Engine piston
DE102014203913A1 (en) * 2014-03-04 2015-09-10 Federal-Mogul Wiesbaden Gmbh Rifle
US10926330B2 (en) * 2017-02-17 2021-02-23 Tenneco Inc. Steel piston with metallurgically bonded bushing and method of manufacturing
CN114645798B (en) * 2022-03-14 2023-02-28 北京理工大学 Piston pin hole bush structure

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US1623972A (en) * 1924-06-12 1927-04-12 Louis M Stellmann Piston and piston-pin construction
US2027035A (en) * 1930-01-23 1936-01-07 Cooper Bessemer Corp Wrist pin bearing construction
IT1076836B (en) * 1975-11-26 1985-04-27 Skf Ind Trading & Dev STRIP BUSHING
US4189932A (en) * 1976-12-20 1980-02-26 Dana Corporation Piston pin bore and method of finishing
DE3404903A1 (en) * 1984-02-11 1985-08-14 Mahle Gmbh, 7000 Stuttgart MOLDED ALUMINUM PISTON FOR COMBUSTION ENGINES WITH SURFACE MECHANICALLY COMPRESSED HUB HOLES
DE3642825C1 (en) * 1986-12-16 1988-01-21 Wieland Werke Ag Use of a copper-nickel-aluminium-tin alloy as a material for slide bearings
GB2213209B (en) * 1987-12-26 1991-11-13 Honda Motor Co Ltd Bearing arrangements
DE3932563A1 (en) * 1989-09-29 1991-04-11 Kolbenschmidt Ag Light alloy piston for IC engine - incorporates gudgeon pin bushes expanded by rolling
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DE4019055C1 (en) * 1990-06-15 1991-11-14 Wilhelm Hedtmann Gmbh & Co Kg, 5800 Hagen, De Clamping bush for bearings - has interlocking formations on end faces of bearing slot wall
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Non-Patent Citations (1)

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Title
See references of WO0011377A1 *

Also Published As

Publication number Publication date
BR9911345A (en) 2001-10-16
WO2000011377A1 (en) 2000-03-02
DE19837596C1 (en) 2000-01-05
US6345599B1 (en) 2002-02-12

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