EP0902180A2 - Piston à métal léger pour un moteur à combustion interne - Google Patents

Piston à métal léger pour un moteur à combustion interne Download PDF

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Publication number
EP0902180A2
EP0902180A2 EP98117145A EP98117145A EP0902180A2 EP 0902180 A2 EP0902180 A2 EP 0902180A2 EP 98117145 A EP98117145 A EP 98117145A EP 98117145 A EP98117145 A EP 98117145A EP 0902180 A2 EP0902180 A2 EP 0902180A2
Authority
EP
European Patent Office
Prior art keywords
piston
light metal
hubs
metal piston
piston according
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)
English (en)
Other versions
EP0902180A3 (fr
EP0902180B1 (fr
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/fr
Publication of EP0902180A3 publication Critical patent/EP0902180A3/fr
Application granted granted Critical
Publication of EP0902180B1 publication Critical patent/EP0902180B1/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 
    • 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

Definitions

  • the invention relates to a light metal piston for Internal combustion engines with a roof-shaped piston crown one especially asymmetrical Combustion chamber trough.
  • Such a piston is known.
  • the piston crown faces two flat piston crown surfaces inclined towards each other, the over a common ridge line that runs parallel to the Piston pin axis runs, merge and hereby form the roof shape, so that in Looking at the piston pin direction results in a gable shape.
  • Firing bowl shape affects the top heaviness due to the material accumulation in the head area due to the shape of the roof as disadvantageous, in particular the Piston noise in operation problems and there must be one relatively long shaft length can be used to the To guide pistons in the cylinder and as a result of Evenly absorb the head heaviness and to be able to derive.
  • the object of the invention is to a piston of the type described above improve that the problems mentioned do not occur.
  • This task is carried out with a piston of the type mentioned solved according to the invention in that the hubs in Pin axis direction are reset so that the outer hub distance 60 to 65% of the piston diameter or is less, and that above the outer surfaces of the recessed hubs an angle ⁇ in the circumferential direction open cavity enclosing between 45 and 60 ° is provided, which is in the direction of the piston crown extends the area behind the ring field, and that the hub inner surfaces trapezoidal or stepped are offset, and the shaft length 35 to 40% of the piston diameter is.
  • the top-heavyness of the piston is reduced.
  • the hub will reset radially outside of the Outside surface of the hubs space for the formation of the weight-reducing cavities above the hubs created. It has been shown that through a trapezoidal or step-shaped formation of the Inner hub surfaces due to hub reset deteriorated power transmission to the piston pin can be compensated by at least in the upper Area of the hub a sufficient wing between the hub and bolts is available.
  • Hub inner surfaces have proven to be advantageous if this is at an angle of 10 to 15 ° to the The longitudinal axis of the piston is inclined.
  • the stretched in the area behind the ring field Cavities preferably extend at least to over the plane of the groove upper flank delimiting the upper ring groove. If the design of the combustion chamber trough permits, the cavity also extends deeper into the piston crown stretch in to the beneficial weight reduction effect even more effectively. It has been shown that at an extension of the cavity in the circumferential direction of less than 60 °, preferably 50-55 °, a weakening or a distortion of the piston crown and the ring field due to tensile and compressive stresses does not adversely notice if the Cavity up to the named level of the top ring groove delimiting groove flank extends.
  • One of the roof shapes has proven to be particularly advantageous appropriately optimized design of the cavity proved that the depth of the cavity from the formed by the piston pin axis and the piston longitudinal axis Level in the circumferential direction in both directions decreases, d. H. that the depth of the cavity is analogous to that Roof shape runs and, preferably the slope of the Roof shape correspondingly, decreases towards the sides.
  • Piston shank By improving the tribological properties Coating of sections forming the sliding surfaces Piston shank can be the clearance of the piston in the cylinder be kept small.
  • the coating in the form of a Lubricating varnish reduces the tilting movements of the piston impact impulses transmitted to the cylinder wall. Thereby the noise occurring during operation is reduced and it is a reduction in the risk of feeding through reduced Frictional forces on the sliding surfaces even under unfavorable ones Load states in motor operation causes.
  • the figures show a light metal piston with a roof-shaped piston head 2 with a combustion chamber trough 4.
  • An the piston crown 2 encloses the ring field 6 forming circumferential section 8.
  • the one-piece piston comprises two sliding wall sections 10 forming shaft wall sections 12 that form on the section 8 forming the ring field 6 connect and form a total of 14 pin hubs 16 connecting wall sections in FIG Merge circumferentially into one another.
  • the hubs 14 are set back in such a way that the distance of the outer hub surfaces 18 from one another is 65% of the piston diameter D k .
  • the inner hub surfaces 20 are trapezoidal, so that the hubs taper in the direction of the free shaft end.
  • the hub outer surfaces 18 merge without undercuts and flush into the wall surfaces 24 delimiting the cavities 22.
  • the height or depth of the cavities 22 measured in the longitudinal direction of the piston is such that they extend to the plane indicated by reference numeral 26 in FIG. 1, which is defined by the groove flank 28 delimiting the upper annular groove.
  • the shaft length L s is 42% of the piston diameter D k .
  • the piston is made of a light alloy, preferably with a heat-resistant aluminum alloy especially 11-13% by weight Si, 3.3-4.2% by weight Cu, 1.8- 2.5 wt.% Ni produced.
  • a heat-resistant aluminum alloy especially 11-13% by weight Si, 3.3-4.2% by weight Cu, 1.8- 2.5 wt.% Ni produced.

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)
EP98117145A 1997-09-12 1998-09-10 Piston à métal léger pour un moteur à combustion interne Expired - Lifetime EP0902180B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19740065A DE19740065A1 (de) 1997-09-12 1997-09-12 Leichtmetallkolben für Brennkraftmaschinen
DE19740065 1997-09-12

Publications (3)

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

Family

ID=7842099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98117145A Expired - Lifetime EP0902180B1 (fr) 1997-09-12 1998-09-10 Piston à métal léger pour un moteur à combustion interne

Country Status (2)

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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236874A2 (fr) * 2001-02-28 2002-09-04 Honda Giken Kogyo Kabushiki Kaisha Moteur à combustion interne
DE10145589A1 (de) * 2001-09-15 2003-04-24 Ks Kolbenschmidt Gmbh Kolben für eine Brennkraftmaschine
EP1338782A1 (fr) * 2002-02-22 2003-08-27 General Motors Corporation Chambre de combustion pour moteur à injection directe, allumage commandé et tourbillon vertical
EP1561938A1 (fr) * 2004-02-06 2005-08-10 Yamaha Hatsudoki Kabushiki Kaisha Piston pour un moteur à combustion interne
JP2009506259A (ja) * 2005-08-29 2009-02-12 カーエス コルベンシュミット ゲゼルシャフト ミット ベシュレンクテル ハフツング 軽量ピストン

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013009415A1 (de) * 2013-06-05 2014-12-11 Man Diesel & Turbo Se Kolben einer Brennkraftmaschine
DE102016114957A1 (de) 2015-08-11 2017-02-16 Ks Kolbenschmidt Gmbh Kolben für eine Brennkraftmaschine
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 (de) * 1987-07-11 1989-01-19 Mahle Gmbh Tauchkolben fuer verbrennungsmotoren
DE4110306A1 (de) * 1990-09-20 1992-03-26 Mahle Gmbh Tauchkolben aus leichtmetall fuer ottomotoren
DE4210056A1 (de) * 1992-03-27 1993-09-30 Mahle Gmbh Hubkolben eines Verbrennungsmotors
DE4229071A1 (de) * 1992-09-01 1994-03-03 Kolbenschmidt Ag Leichtmetallkolben für Brennkraftmaschinen
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 (de) * 1995-03-20 1996-09-26 Mahle Gmbh Leichter, gegossener Kolben für Verbrennungsmotoren
DE19530631B4 (de) * 1995-08-21 2005-09-22 Mahle Gmbh Tauchkolben für Verbrennungsmotoren mit einem geteilten Kolbenbolzen
DE19537028A1 (de) * 1995-10-05 1997-04-10 Iav Gmbh Walzenförmiger Brennraum, vorzugsweise für Dieselmotoren

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 (de) * 1987-07-11 1989-01-19 Mahle Gmbh Tauchkolben fuer verbrennungsmotoren
DE4110306A1 (de) * 1990-09-20 1992-03-26 Mahle Gmbh Tauchkolben aus leichtmetall fuer ottomotoren
DE4210056A1 (de) * 1992-03-27 1993-09-30 Mahle Gmbh Hubkolben eines Verbrennungsmotors
DE4229071A1 (de) * 1992-09-01 1994-03-03 Kolbenschmidt Ag Leichtmetallkolben für Brennkraftmaschinen
US5562074A (en) * 1994-09-30 1996-10-08 Dr.Ing. H.C.F. Porsche Ag Piston for internal-combustion engines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236874A2 (fr) * 2001-02-28 2002-09-04 Honda Giken Kogyo Kabushiki Kaisha Moteur à combustion interne
EP1236874B1 (fr) * 2001-02-28 2007-06-06 Honda Giken Kogyo Kabushiki Kaisha Moteur à combustion interne
DE10145589A1 (de) * 2001-09-15 2003-04-24 Ks Kolbenschmidt Gmbh Kolben für eine Brennkraftmaschine
DE10145589B4 (de) * 2001-09-15 2006-09-14 Ks Kolbenschmidt Gmbh Kolben für eine Brennkraftmaschine
EP1338782A1 (fr) * 2002-02-22 2003-08-27 General Motors Corporation Chambre de combustion pour moteur à injection directe, allumage commandé et tourbillon vertical
US6745745B2 (en) 2002-02-22 2004-06-08 General Motors Corporation Combustion chamber for reverse tumble spark ignition direct injection engine
EP1561938A1 (fr) * 2004-02-06 2005-08-10 Yamaha Hatsudoki Kabushiki Kaisha Piston pour un moteur à combustion interne
JP2009506259A (ja) * 2005-08-29 2009-02-12 カーエス コルベンシュミット ゲゼルシャフト ミット ベシュレンクテル ハフツング 軽量ピストン

Also Published As

Publication number Publication date
DE59806259D1 (de) 2002-12-19
EP0902180A3 (fr) 1999-12-15
EP0902180B1 (fr) 2002-11-13
DE19740065A1 (de) 1999-03-18

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