EP0902180A3 - Lightweight metal piston for an internal combustion engine - Google Patents

Lightweight metal piston for an internal combustion engine Download PDF

Info

Publication number
EP0902180A3
EP0902180A3 EP98117145A EP98117145A EP0902180A3 EP 0902180 A3 EP0902180 A3 EP 0902180A3 EP 98117145 A EP98117145 A EP 98117145A EP 98117145 A EP98117145 A EP 98117145A EP 0902180 A3 EP0902180 A3 EP 0902180A3
Authority
EP
European Patent Office
Prior art keywords
piston
internal combustion
combustion engine
metal piston
lightweight metal
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
EP98117145A
Other languages
German (de)
French (fr)
Other versions
EP0902180A2 (en
EP0902180B1 (en
Inventor
Johannes Spermann
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 EP0902180A2 publication Critical patent/EP0902180A2/en
Publication of EP0902180A3 publication Critical patent/EP0902180A3/en
Application granted granted Critical
Publication of EP0902180B1 publication Critical patent/EP0902180B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 
    • F02F3/26—Pistons  having combustion chamber in piston head
    • 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

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

Die Erfindung betrifft einen Leichtmetallkolben für Brennkraftmaschinen mit einem dachförmigen Kolbenboden (2) mit einer üblicherweise asymetrisch ausgebildeten Brennraummulde (4); um die Kopflastigkeit eines derartigen Kolbens zu reduzieren, wird der Kolben erfindungsgemäß so ausgebildet, dass die Naben (14) in Bolzenachsenrichtung (x) derart zurückgesetzt sind, dass der äußere Nabenabstand 60 - 65 % des Kolbendurchmessers (Dk) oder weniger beträgt, und dass oberhalb der Außenflächen (18) der zurückgesetzten Naben (14) ein in Umfangsrichtung einen Winkel (α) zwischen 45 und 60° einschließender offener Hohlraum (22) vorgesehen ist, der sich in Richtung auf den Kolbenboden (2) in den Bereich hinter dem Ringfeld (6) hineinerstreckt, und dass die Nabeninnenflächen (20) trapezförmig oder stufenförmig abgesetzt ausgebildet sind, und die Schaftlänge (Ls) 40 - 45 % des Kolbendurchmessers (Dk) beträgt.

Figure 00000001
The invention relates to a light metal piston for internal combustion engines with a roof - shaped piston head (2) with a combustion chamber trough (4) which is usually of asymmetrical design; In order to reduce the top-heavyness of such a piston, the piston is designed according to the invention in such a way that the hubs (14) are set back in the pin axis direction (x) in such a way that the outer hub distance is 60-65% of the piston diameter (D k ) or less, and that above the outer surfaces (18) of the recessed hubs (14) there is an open cavity (22) enclosing an angle (α) in the circumferential direction between 45 and 60 °, which in the direction of the piston head (2) in the area behind the Ring field (6), and that the hub inner surfaces (20) are trapezoidal or stepped, and the shaft length (L s ) is 40-45% of the piston diameter (D k ).
Figure 00000001
EP98117145A 1997-09-12 1998-09-10 Lightweight metal piston for an internal combustion engine Expired - Lifetime EP0902180B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19740065 1997-09-12
DE19740065A DE19740065A1 (en) 1997-09-12 1997-09-12 Light alloy pistons for internal combustion engines

Publications (3)

Publication Number Publication Date
EP0902180A2 EP0902180A2 (en) 1999-03-17
EP0902180A3 true EP0902180A3 (en) 1999-12-15
EP0902180B1 EP0902180B1 (en) 2002-11-13

Family

ID=7842099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98117145A Expired - Lifetime EP0902180B1 (en) 1997-09-12 1998-09-10 Lightweight metal piston for an internal combustion engine

Country Status (2)

Country Link
EP (1) EP0902180B1 (en)
DE (2) DE19740065A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002327624A (en) * 2001-02-28 2002-11-15 Honda Motor Co Ltd Internal combustion engine
DE10145589B4 (en) * 2001-09-15 2006-09-14 Ks Kolbenschmidt Gmbh Piston for an internal combustion engine
US6745745B2 (en) 2002-02-22 2004-06-08 General Motors Corporation Combustion chamber for reverse tumble spark ignition direct injection engine
JP2005248949A (en) * 2004-02-06 2005-09-15 Yamaha Motor Co Ltd Internal combustion engine
BRPI0615298A2 (en) * 2005-08-29 2011-05-17 Ks Kolbenschmidt Gmbh lightweight piston
DE102013009415A1 (en) * 2013-06-05 2014-12-11 Man Diesel & Turbo Se Piston of an internal combustion engine
EP3334918A1 (en) * 2015-08-11 2018-06-20 KS Kolbenschmidt GmbH Piston for an internal combustion engine
US10865734B2 (en) 2017-12-06 2020-12-15 Ai Alpine Us Bidco Inc Piston assembly with offset tight land profile

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2295199A (en) * 1941-12-27 1942-09-08 Wright Aeronautical Corp Piston
DE3723005A1 (en) * 1987-07-11 1989-01-19 Mahle Gmbh Trunk piston for internal combustion engines
DE4110306A1 (en) * 1990-09-20 1992-03-26 Mahle Gmbh SUBMERSIBLE ALLOY PISTON FOR OTTO ENGINES
DE4210056A1 (en) * 1992-03-27 1993-09-30 Mahle Gmbh Reciprocating piston of an internal combustion engine
DE4229071A1 (en) * 1992-09-01 1994-03-03 Kolbenschmidt Ag Light alloy piston, for internal combustion engines - comprises insert made of pressed, sintered chips of metallic material
US5562074A (en) * 1994-09-30 1996-10-08 Dr.Ing. H.C.F. Porsche Ag Piston for internal-combustion engines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510050A1 (en) * 1995-03-20 1996-09-26 Mahle Gmbh Lightweight, cast piston for IC engine
DE19530631B4 (en) * 1995-08-21 2005-09-22 Mahle Gmbh Piston for internal combustion engines with a split piston pin
DE19537028A1 (en) * 1995-10-05 1997-04-10 Iav Gmbh Roll-shaped combustion cavity for diesel engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2295199A (en) * 1941-12-27 1942-09-08 Wright Aeronautical Corp Piston
DE3723005A1 (en) * 1987-07-11 1989-01-19 Mahle Gmbh Trunk piston for internal combustion engines
DE4110306A1 (en) * 1990-09-20 1992-03-26 Mahle Gmbh SUBMERSIBLE ALLOY PISTON FOR OTTO ENGINES
DE4210056A1 (en) * 1992-03-27 1993-09-30 Mahle Gmbh Reciprocating piston of an internal combustion engine
DE4229071A1 (en) * 1992-09-01 1994-03-03 Kolbenschmidt Ag Light alloy piston, for internal combustion engines - comprises insert made of pressed, sintered chips of metallic material
US5562074A (en) * 1994-09-30 1996-10-08 Dr.Ing. H.C.F. Porsche Ag Piston for internal-combustion engines

Also Published As

Publication number Publication date
DE19740065A1 (en) 1999-03-18
EP0902180A2 (en) 1999-03-17
EP0902180B1 (en) 2002-11-13
DE59806259D1 (en) 2002-12-19

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