EP0705968B1 - Piston pour moteur à combustion - Google Patents

Piston pour moteur à combustion Download PDF

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Publication number
EP0705968B1
EP0705968B1 EP95111387A EP95111387A EP0705968B1 EP 0705968 B1 EP0705968 B1 EP 0705968B1 EP 95111387 A EP95111387 A EP 95111387A EP 95111387 A EP95111387 A EP 95111387A EP 0705968 B1 EP0705968 B1 EP 0705968B1
Authority
EP
European Patent Office
Prior art keywords
piston
gudgeon
webs
pin
skirt
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.)
Expired - Lifetime
Application number
EP95111387A
Other languages
German (de)
English (en)
Other versions
EP0705968A1 (fr
Inventor
Alfred Koch
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0705968A1 publication Critical patent/EP0705968A1/fr
Application granted granted Critical
Publication of EP0705968B1 publication Critical patent/EP0705968B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 
    • F02F3/0076—Pistons  the inside of the pistons being provided with ribs or fins
    • 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

Definitions

  • the invention relates to a piston for internal combustion engines according to the Genus of the main claim.
  • Such a piston is described for example in DE 41 09 160 C2.
  • a high degree of elasticity reach and avoid stress concentration, this is asymmetrical in executed with respect to the pin axis.
  • the pulled down part of the Shaft wall extends over a larger circumferential angle than that pulled down part of the shaft wall of the counter pressure side.
  • Between the The wall of the shaft and the indented bolt eyes are arched Crossbars on the pressure side of the piston relative to the counter pressure side are offset outside.
  • the entire piston structure is mirror-symmetrical to one Plane perpendicular to the pin axis.
  • the invention has for its object a piston for internal combustion engines to be designed so that this is a floor surface that is easily accessible for cooling has high strength and sufficient rigidity and with conventional methods is simple and inexpensive to manufacture.
  • This Pistons are designed for high to very high compression and very high engine outputs be suitable at correspondingly high combustion chamber or piston temperatures.
  • the rigidity and strength of the piston are advantageously increased, if the webs not offset to the outside are in a central area of the Bolt eyes are connected to these. This results geometrically favorable conditions on the bolt eye, the one for strength Enable required connection in a simple way and on the other hand almost enable balanced leverage on the bolt eye.
  • a piston 1 is shown, which is known per se Bolt 2 is connected to the connecting rod 3 of an internal combustion engine.
  • the connecting rod 3 is connected to a crankshaft 4 which is mounted in bearing seats 5.
  • Spray oil hole 6 shown in dashed lines, which with the oil supply the internal combustion engine is connected. About this spray oil hole 6 is in Operation of the internal combustion engine oil for cooling the piston 1 to the inside the piston crown 7 injected.
  • the piston 1 has a circumferential, in Piston shaft 8 closed in the circumferential direction with three circumferential grooves 9 for receiving piston pistons or Oil scraper rings.
  • Four webs 10, 11 extend from the piston skirt, of which two opposite each other and with a bolt eye 12, 13 are connected.
  • the two bolt eyes 12 and 13 are aligned Provided holes 14 for receiving the bolt 2.
  • the bolt eye 13 shown on the right in the sectional view in FIG. 2 is located itself in the assembled state of the internal combustion engine Side of the connecting rod 3 as that associated with the corresponding piston, with the Spray oil bore 6 provide bearing bridge 5.
  • the spray oil bore 6 is at a distance arranged to the longitudinal axis of the crankshaft, i.e. it is off-center.
  • this spray oil bore 6 between pin eye 13 and piston skirt 8 is perpendicular to the longitudinal axis of the Bolts or the bores 14 offset to the outside.
  • the three other bridges have at least approximately the same distance from this plane E.
  • the Offset of the web 11 is in the sectional view based on its location Bearing bridge 5 clearly.
  • the piston shaft 8 is open for better piston guidance in the cylinder bore two opposite sides each between the pin eyes 12, 13 extended.

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)

Claims (5)

  1. Piston pour moteurs à combustion interne avec chemises de cylindre sensiblement circulaires, avec un fond de piston (7) et une tige de piston (8) fermée au moins sur une partie de sa longueur axiale, dans la direction périphérique, avec des bossages d'axe (12, 13), en retrait par rapport au diamètre de la tige de piston, avec des nervures (10, 11) opposées l'une à l'autre entre les bossages d'axe et la paroi (8) de la tige, caractérisé en ce que le piston est forgé, en ce que le piston est refroidi avec de l'huile pulvérisée pendant le fonctionnement du moteur, en ce que l'une des nervures (11) est décalée vers l'extérieur entre le bossage d'axe (13) et la paroi (8) de la tige, par rapport à la nervure (10) opposée, agissant sur le même bossage d'axe, et en ce que les deux nervures (10) de l'autre bossage d'axe (12) ont la même distance par rapport à un plan médian (E), perpendiculairement à l'axe de l'axe de piston.
  2. Piston selon la revendication 1, caractérisé en ce que les nervures (10), non décalées vers l'extérieur, sont reliées, dans une zone centrale du bossage d'axe (12, 13), avec celui-ci.
  3. Piston selon la revendication 1 ou 2, caractérisé en ce que les nervures (10, 11) s'étendent au moins approximativement en ligne droite.
  4. Piston selon une ou plusieurs des revendications précédentes, caractérisé en ce que les nervures (10, 11) partent à peu près à angle droit du bossage d'axe (12, 13).
  5. Piston selon une ou plusieurs des revendications précédentes, caractérisé en ce que des portions de tige, partant de la tige de piston fermée, s'étendent entre les bossages d'axe.
EP95111387A 1994-09-30 1995-07-20 Piston pour moteur à combustion Expired - Lifetime EP0705968B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4434994A DE4434994C2 (de) 1994-09-30 1994-09-30 Kolben für Brennkraftmaschinen
DE4434994 1994-09-30

Publications (2)

Publication Number Publication Date
EP0705968A1 EP0705968A1 (fr) 1996-04-10
EP0705968B1 true EP0705968B1 (fr) 1998-04-08

Family

ID=6529626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111387A Expired - Lifetime EP0705968B1 (fr) 1994-09-30 1995-07-20 Piston pour moteur à combustion

Country Status (4)

Country Link
US (1) US5562074A (fr)
EP (1) EP0705968B1 (fr)
JP (1) JPH08177620A (fr)
DE (2) DE4434994C2 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538407A1 (de) * 1995-10-16 1997-04-17 Mahle Gmbh Gegossener Leichmetallkolben für einen 2-Takt-Motor
DE19740065A1 (de) * 1997-09-12 1999-03-18 Ks Kolbenschmidt Gmbh Leichtmetallkolben für Brennkraftmaschinen
DE19747746C1 (de) * 1997-10-29 1998-11-19 Alcan Gmbh Gekühlter Kolben für Verbrennungskraftmaschinen und Verbrennungskraftmaschinen mit derartigen Kolben
DE19810883A1 (de) * 1998-03-13 1999-09-16 Ks Kolbenschmidt Gmbh Leichtmetallkolben für Brennkraftmaschinen
JP2000008948A (ja) * 1998-04-21 2000-01-11 Nissan Motor Co Ltd 内燃機関のピストン
AU2002213255A1 (en) * 2000-10-18 2002-04-29 Federal Mogul Corporation Multi-axially forged piston
DE10325917A1 (de) 2003-06-07 2005-03-31 Mahle Gmbh Kolben für einen Verbrennungsmotor und Gießverfahren zu dessen Herstellung
DE102005043747A1 (de) 2005-09-14 2007-03-22 GM Global Technology Operations, Inc., Detroit Kolben für eine Brennkraftmaschine
JP2012505350A (ja) 2008-10-13 2012-03-01 デラウェア キャピタル フォーメーション インコーポレイテッド 改良された横負荷抵抗を有するピストン
DE102009045437A1 (de) * 2009-10-07 2011-04-14 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor und Verbrennungsmotor mit einem Kolben
DE102011080822A1 (de) * 2011-08-11 2013-02-14 Mahle International Gmbh Kolben
DE102015217911A1 (de) * 2015-09-18 2017-03-23 Mahle International Gmbh Kolben für eine Brennkraftmaschine
CN108026861A (zh) * 2015-10-13 2018-05-11 Ks科尔本施密特有限公司 中间支承的活塞裙

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1960313A (en) * 1929-12-30 1934-05-29 Elmer C Long Piston for an internal combustion motor
DE711937C (de) * 1938-11-10 1941-10-09 Elektron Co M B H Geschmiedeter Kolben fuer Brennkraftmaschinen, insbesondere Flugmotorkolben
DE2808914C2 (de) * 1978-03-02 1983-10-27 Mahle Gmbh, 7000 Stuttgart Leichtmetallhubkolben für Verbrennungsmotoren
IT1118774B (it) * 1979-06-12 1986-03-03 Ass Eng Italia Perfezionamento relativo aglistantuffi nei motori diesel
US4377967A (en) * 1981-03-27 1983-03-29 Mack Trucks, Inc. Two-piece piston assembly
DE3210771A1 (de) * 1982-03-24 1983-09-29 Günter 8543 Hilpoltstein Elsbett Kolbentrieb fuer hubkolben-brennkraftmaschinen, wie dieselmotoren u.a.
DE3425965A1 (de) * 1984-07-14 1986-01-16 Kolbenschmidt AG, 7107 Neckarsulm Leichtmetallkolben fuer brennkraftmaschinen
IT1228961B (it) * 1989-03-03 1991-07-11 Gilardoni Vittorio Spa Pistone alleggerito.
US5076225A (en) * 1989-12-28 1991-12-31 Toyota Jidosha Kabushiki Kaisha Piston for an internal combustion engine
DE4109160C3 (de) * 1991-03-20 2000-11-30 Federal Mogul Nuernberg Gmbh Kolben für Brennkraftmaschinen
JPH0618642U (ja) * 1992-08-11 1994-03-11 株式会社ユニシアジェックス ピストン
JPH06147004A (ja) * 1992-11-13 1994-05-27 Aisin Seiki Co Ltd 内燃機関用ピストン
US5408916A (en) * 1993-09-07 1995-04-25 Ford Motor Company Piston having a liner and method for manufacturing same

Also Published As

Publication number Publication date
US5562074A (en) 1996-10-08
DE4434994A1 (de) 1996-04-11
EP0705968A1 (fr) 1996-04-10
DE59501832D1 (de) 1998-05-14
JPH08177620A (ja) 1996-07-12
DE4434994C2 (de) 1998-02-19

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