EP0705968A1 - Piston pour moteur à combustion - Google Patents

Piston pour moteur à combustion Download PDF

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Publication number
EP0705968A1
EP0705968A1 EP95111387A EP95111387A EP0705968A1 EP 0705968 A1 EP0705968 A1 EP 0705968A1 EP 95111387 A EP95111387 A EP 95111387A EP 95111387 A EP95111387 A EP 95111387A EP 0705968 A1 EP0705968 A1 EP 0705968A1
Authority
EP
European Patent Office
Prior art keywords
piston
webs
bolt
eye
shaft
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
EP95111387A
Other languages
German (de)
English (en)
Other versions
EP0705968B1 (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 preamble of the main claim.
  • Such a piston is described for example in DE 41 09 160 C2.
  • it is designed asymmetrically with respect to the pin axis.
  • the part of the shaft wall that is pulled down extends over a larger circumferential angle than the part of the shaft wall that is pulled down on the counter-pressure side.
  • the entire piston structure is mirror-symmetrical to a plane perpendicular to the pin axis.
  • the invention has for its object to design a piston for internal combustion engines so that it has an easily accessible bottom surface for cooling, high strength and sufficient rigidity and is simple and inexpensive to manufacture with conventional methods.
  • This piston should be suitable for high to very high compressions and very high engine outputs with correspondingly high combustion chamber or piston temperatures.
  • the piston By producing the piston as a forged component, a high-strength, highly resilient, rigid piston is formed using methods known per se. Good heat dissipation is possible by using a spray oil cooling system that acts on the piston crown. By relocating one of the webs between the pin eye and the shaft wall relatively to the outside, good accessibility of the oil jet to the piston crown is made possible. When the spray oil cooling or the corresponding bore is arranged, this web, which is offset to the outside, is located above in one of the bearing blocks of the crankshaft the corresponding hole. By moving the web, on the one hand, a relatively large floor area for the spray oil cooling is made available.
  • the outward displacement of the web enables the oil jet to be freely accessible without the strength or rigidity of the piston suffering.
  • the one-sided displacement of one of the webs enables relatively large shaping surfaces to be retained, through which a forging process is possible without excessive wear.
  • the rigidity and strength of the piston are advantageously increased if the webs which are not offset to the outside are connected to them in a central region of the bolt eye. This results in geometrically favorable conditions on the bolt eye, which on the one hand enable a connection required for strength in a simple manner and on the other hand enable almost balanced lever ratios on the bolt eye.
  • the rigidity and strength of the piston if the webs are approximately at right angles, i. H. leave the bolt eye at an angle between about 80 and 100 degrees.
  • shaft sections which start from the closed piston shaft, run down between the bolt eye and allow sufficient guidance of the piston.
  • a piston 1 is shown, which is connected to the connecting rod 3 of an internal combustion engine via a known bolt 2.
  • the connecting rod 3 is connected to a crankshaft 4 which is mounted in bearing seats 5.
  • a dashed oil bore 6 is shown, which is connected to the oil supply of the internal combustion engine.
  • oil for cooling the piston 1 is sprayed onto the inside of the piston head 7 via this spray oil bore 6.
  • the piston 1 has a circumferential piston shaft 8 which is closed in the circumferential direction and has three circumferential grooves 9 for receiving piston rings or oil scraper rings which are known and are not shown.
  • Four webs 10, 11 extend from the piston skirt, two of which lie opposite each other and are connected with a bolt eye 12, 13.
  • the two bolt eyes 12 and 13 are provided with aligned bores 14 for receiving the bolt 2.
  • the bolt eye 13 shown on the right in the sectional view in FIG. 2 is in the assembled state of the internal combustion engine on the same side of the connecting rod 3 as the bearing bridge 5 assigned to the corresponding piston and provided with the spray oil bore 6.
  • the spray oil bore 6 is at a distance from the longitudinal axis of the Crankshaft arranged, ie it is off-center.
  • the web 11 arranged above this spray oil bore 6 between the bolt eye 13 and the piston skirt 8 is offset to the outside with respect to a plane E perpendicular to the longitudinal axis of the bolt or the bores 14.
  • the three other webs are at least approximately the same distance from this plane E.
  • the offset of the web 11 is clear in the sectional view based on its position in relation to the bearing bracket 5.
  • This displacement of the web 11 to the outside enables better access to the oil jet of the spray oil cooling to the piston crown 7.
  • This space covered by the piston crown 7 is formed by the webs 10, 11, the bolt eye 13 and the connecting part of the shaft wall 8.
  • the piston shaft 8 is extended between the pin eyes 12, 13 on two opposite sides.

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)
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 true EP0705968A1 (fr) 1996-04-10
EP0705968B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810883A1 (de) * 1998-03-13 1999-09-16 Ks Kolbenschmidt Gmbh Leichtmetallkolben für Brennkraftmaschinen
EP0913566A3 (fr) * 1997-10-29 2000-02-23 Federal-Mogul Nürnberg GmbH Piston refroidi pour un moteur à combustion interne et moteur avec ce piston

Families Citing this family (11)

* 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
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458685A1 (fr) * 1979-06-12 1981-01-02 Ass Eng Italia Piston pour moteur diesel
EP0385390A1 (fr) * 1989-03-03 1990-09-05 Dott. Vittorio Gilardoni S.p.A. Piston allégé
DE4109160A1 (de) * 1991-03-20 1992-09-24 Alcan Gmbh Kolben fuer brennkraftmaschinen
DE4338571A1 (de) * 1992-11-13 1994-05-19 Aisin Seiki Kolben für einen Verbrennungsmotor

Family Cites Families (9)

* 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
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
US5076225A (en) * 1989-12-28 1991-12-31 Toyota Jidosha Kabushiki Kaisha Piston for an internal combustion engine
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
US5408916A (en) * 1993-09-07 1995-04-25 Ford Motor Company Piston having a liner and method for manufacturing same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458685A1 (fr) * 1979-06-12 1981-01-02 Ass Eng Italia Piston pour moteur diesel
EP0385390A1 (fr) * 1989-03-03 1990-09-05 Dott. Vittorio Gilardoni S.p.A. Piston allégé
DE4109160A1 (de) * 1991-03-20 1992-09-24 Alcan Gmbh Kolben fuer brennkraftmaschinen
DE4109160C2 (fr) 1991-03-20 1993-06-17 Alcan Deutschland Gmbh, 3400 Goettingen, De
DE4338571A1 (de) * 1992-11-13 1994-05-19 Aisin Seiki Kolben für einen Verbrennungsmotor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0913566A3 (fr) * 1997-10-29 2000-02-23 Federal-Mogul Nürnberg GmbH Piston refroidi pour un moteur à combustion interne et moteur avec ce piston
DE19810883A1 (de) * 1998-03-13 1999-09-16 Ks Kolbenschmidt Gmbh Leichtmetallkolben für Brennkraftmaschinen

Also Published As

Publication number Publication date
US5562074A (en) 1996-10-08
DE4434994A1 (de) 1996-04-11
EP0705968B1 (fr) 1998-04-08
DE59501832D1 (de) 1998-05-14
JPH08177620A (ja) 1996-07-12
DE4434994C2 (de) 1998-02-19

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