EP1161624A1 - Piston en plusieurs parties - Google Patents

Piston en plusieurs parties

Info

Publication number
EP1161624A1
EP1161624A1 EP00907440A EP00907440A EP1161624A1 EP 1161624 A1 EP1161624 A1 EP 1161624A1 EP 00907440 A EP00907440 A EP 00907440A EP 00907440 A EP00907440 A EP 00907440A EP 1161624 A1 EP1161624 A1 EP 1161624A1
Authority
EP
European Patent Office
Prior art keywords
piston
built
steel
piston according
built piston
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
EP00907440A
Other languages
German (de)
English (en)
Other versions
EP1161624B1 (fr
Inventor
Jochen Kortas
Stefan Lipp
Wilfried Sander
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 GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7900418&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1161624(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP1161624A1 publication Critical patent/EP1161624A1/fr
Application granted granted Critical
Publication of EP1161624B1 publication Critical patent/EP1161624B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • 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
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • 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
    • 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
    • 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 built pistons according to the preamble of claim 1. Such pistons are known in practice.
  • the known pistons usually have lower parts made of pressed aluminum or cast iron. It has been shown that the known lower parts increasingly come up against limits in terms of strength and that, in particular in the case of lower parts made of cast iron, these limits are due to casting errors which can be ruled out, in spite of increased testing effort.
  • the invention is therefore concerned with the problem of providing a lower part for the generic piston which satisfies the increased strength requirements.
  • the forging-technical production of the lower part in connection with the material AFP steel provides an economically producible lower part with high strength.
  • AFP steel Since the structure of the AFP steel is adjusted by appropriate heat management during the forging process, there are lower parts for large components with the appropriate wall thickness Built pistons with a diameter of 250 mm or more may be considered as such - the risk that the desired structure will not occur over the entire cross-section and the strength will be correspondingly lower than expected.
  • Titanium can be added to the AFP steel as a means of adjusting the desired structure - in particular with regard to the grain size.
  • the 38MnVS6 steel has proven to be an inexpensive AFP steel.
  • bushings in the hub area can be dispensed with if the piston pin and / or the pin hubs are coated.
  • phosphating is thought of.
  • the lower part material according to the invention also makes it possible to increase the surface pressures in the bolt area.
  • the lower length of the piston built is advantageously reduced to less than 40% of the piston diameter, since this saves weight and avoids problems with forging technology. Due to the higher modulus of elasticity of steel compared to gray cast iron and aluminum, an equivalent straight guidance is nevertheless achieved.
  • One or more recesses for receiving cooling oil are machined in the bottom part of the base.
  • the diameter range for lower parts according to the invention starts at approximately 160 mm. Due to the increased material strength, the wall thicknesses can be locally smaller compared to cast lower parts. However, the tightening bevels required for forging sometimes also result in higher wall thicknesses.
  • the invention is explained in more detail below on the basis of an exemplary embodiment. It shows:
  • Fig. 1 shows a piston built according to the invention in cross section in the DR-GDR direction.
  • a built piston 1 consists of an upper part 2 made of forged steel, which is connected to a lower part 3 made of forged AFP steel with a centrally arranged screw 4.
  • the lower part is made without a socket.
  • the lower length of the lower part is less than 40% of the piston diameter.

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)
  • Clamps And Clips (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un piston en plusieurs parties qui comprend une partie supérieure en acier et une partie inférieure vissée sur cette dernière et comportant les moyeux. L'invention vise à améliorer la résistance mécanique de la partie inférieure, à supprimer les défauts de matériau dans cette dernière et à permettre sa production de manière économique. A cet effet, la partie inférieure est réalisée en acier ferritique perlitique trempé par précipitation, de préférence selon DIN EN 10267, avec addition de titane, et les moyeux de la partie inférieure ne sont pas renforcés, de préférence, avec des douilles.
EP00907440A 1999-03-10 2000-01-25 Piston en plusieurs parties Revoked EP1161624B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19910582 1999-03-10
DE19910582A DE19910582A1 (de) 1999-03-10 1999-03-10 Gebauter Kolben
PCT/DE2000/000199 WO2000053913A1 (fr) 1999-03-10 2000-01-25 Piston en plusieurs parties

Publications (2)

Publication Number Publication Date
EP1161624A1 true EP1161624A1 (fr) 2001-12-12
EP1161624B1 EP1161624B1 (fr) 2003-05-28

Family

ID=7900418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00907440A Revoked EP1161624B1 (fr) 1999-03-10 2000-01-25 Piston en plusieurs parties

Country Status (7)

Country Link
US (1) US6622613B1 (fr)
EP (1) EP1161624B1 (fr)
JP (1) JP2002539356A (fr)
KR (1) KR100573465B1 (fr)
BR (1) BR0008833B1 (fr)
DE (4) DE19910582A1 (fr)
WO (1) WO2000053913A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022035A1 (de) * 2000-05-05 2001-11-08 Mahle Gmbh Verbrennungsmotor mit einem gebauten Kolben
GB2366607B (en) * 2000-09-06 2004-06-09 Federal Mogul Bradford Ltd Piston for internal combustion engine
EP1327089B1 (fr) 2000-10-18 2009-07-22 Federal-Mogul Corporation Piston forge de maniere multiaxiale
DE10210570A1 (de) * 2002-03-09 2003-09-18 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10244513A1 (de) * 2002-09-25 2004-04-08 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor und Verfahren zu dessen Herstellung
DE10244511A1 (de) * 2002-09-25 2004-04-15 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10257022A1 (de) * 2002-12-06 2004-06-17 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
JP4500259B2 (ja) * 2003-03-31 2010-07-14 日立金属株式会社 内燃機関用ピストン及びその製造方法
US20040261752A1 (en) * 2003-06-26 2004-12-30 Wolfgang Rein Phosphatized and bushingless piston and connecting rod assembly having an internal gallery and profiled piston pin
DE102004027974A1 (de) * 2004-06-08 2005-12-29 Mahle Gmbh Gebauter Kolben und Verfahren zur Vermeidung von Beschädigungen in Kontakt zueinander stehender Flächen des Oberteiles und des Unterteiles des Kolbens
DE102004029877A1 (de) * 2004-06-19 2006-01-05 Mahle Gmbh Gebauter Kolben für einen Verbrennungsmotor
DE502006008456D1 (de) * 2005-12-17 2011-01-13 Mahle Int Gmbh Zweiteiliger kolben für einen verbrennungsmotor
DE102005061899A1 (de) 2005-12-23 2007-06-28 Mahle International Gmbh Mehrteiliger Kolben für eine Verbrennungsmotor
DE102007021101A1 (de) 2007-05-03 2008-11-06 Mahle International Gmbh Legierter Stahl und dessen Verwendung
DE102007060472A1 (de) * 2007-12-14 2009-06-18 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
BRPI1008304A2 (pt) 2009-02-27 2017-03-28 Federal-Mogul Corp pistão, e, método para construir um pistão
DE102010053925A1 (de) 2010-12-09 2012-06-14 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
DE102011013143A1 (de) 2011-03-04 2012-09-06 Mahle International Gmbh Kolben für einen Verbrennungsmotor sowie Verfahren zu seiner Herstellung
CN103764983B (zh) * 2011-03-07 2017-03-29 康明斯知识产权公司 用于增强冷却的发动机装置
US9291119B2 (en) * 2013-03-14 2016-03-22 Mahle International Gmbh Piston assembly with preloaded support surfaces

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083292A (en) * 1976-06-16 1978-04-11 Caterpillar Tractor Co. Piston with high top ring location
DE2919638A1 (de) * 1979-05-16 1980-11-20 Schmidt Gmbh Karl Kolben fuer brennkraftmaschinen
DE8421300U1 (de) * 1984-07-17 1988-02-25 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Gebauter Kolben
BR9001859A (pt) * 1990-04-17 1991-11-12 Metal Leve Sa Processo de fabricacao de embolo e embolo
DE4024381C2 (de) * 1990-08-01 1999-01-28 Mahle Gmbh Kolben für Verbrennungsmotoren mit geschmiedeten Bereichen aus Stahl
US5136992A (en) * 1990-07-12 1992-08-11 Mahle Gmbh Piston for internal combustion engines with forged sections made of steel
DE4129746C2 (de) * 1991-09-06 1994-04-14 Man B & W Diesel Ag Gebauter Kolben für Hubkolbenmaschinen
DE4322786A1 (de) 1993-07-08 1995-01-12 Mahle Gmbh Kolben für Verbrennungsmotoren mit geschmiedeten Bereichen aus Stahl
DE4416120A1 (de) * 1994-05-06 1995-11-09 Mahle Gmbh Zweiteiliger Kolben
DE4429489A1 (de) * 1994-08-19 1996-02-22 Mahle Gmbh Gebauter Kolben für Verbrennungsmotoren
FI102559B (fi) * 1995-03-09 1998-12-31 Waertsilae Nsd Oy Ab Polttomoottorin mäntäyksikkö
FR2735148B1 (fr) 1995-06-08 1997-07-11 Lorraine Laminage Tole d'acier laminee a chaud a haute resistance et haute emboutissabilite renfermant du niobium, et ses procedes de fabrication.
DE19721013A1 (de) * 1997-05-20 1998-12-03 Mahle Gmbh Schraubenanordnung bei gebauten Kolben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0053913A1 *

Also Published As

Publication number Publication date
BR0008833A (pt) 2001-12-18
KR100573465B1 (ko) 2006-04-24
US6622613B1 (en) 2003-09-23
DE10080565D2 (de) 2002-03-07
DE20007415U1 (de) 2000-09-28
DE19910582A1 (de) 2000-09-28
WO2000053913A1 (fr) 2000-09-14
DE50002358D1 (de) 2003-07-03
BR0008833B1 (pt) 2009-01-13
EP1161624B1 (fr) 2003-05-28
KR20020004961A (ko) 2002-01-16
JP2002539356A (ja) 2002-11-19

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