EP1920151A1 - Piston de construction legere - Google Patents

Piston de construction legere

Info

Publication number
EP1920151A1
EP1920151A1 EP06777082A EP06777082A EP1920151A1 EP 1920151 A1 EP1920151 A1 EP 1920151A1 EP 06777082 A EP06777082 A EP 06777082A EP 06777082 A EP06777082 A EP 06777082A EP 1920151 A1 EP1920151 A1 EP 1920151A1
Authority
EP
European Patent Office
Prior art keywords
piston
pin bore
free space
shaft wall
bore
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.)
Ceased
Application number
EP06777082A
Other languages
German (de)
English (en)
Inventor
Ralf Buschbeck
Johannes Spermann
Albert Haberl
Klaus Lormes
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
Priority claimed from DE102005041001A external-priority patent/DE102005041001A1/de
Priority claimed from DE200510041002 external-priority patent/DE102005041002A1/de
Application filed by KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP1920151A1 publication Critical patent/EP1920151A1/fr
Ceased 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 
    • F02F3/0076—Pistons  the inside of the pistons being provided with ribs or fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F01M2011/025—Arrangements of lubricant conduits for lubricating gudgeon pins

Definitions

  • the invention relates to a piston having a ring bottom having a piston head and a piston shaft arranged thereon according to the features of the preamble of claim 1.
  • Such a piston is known from DE 101 45 589 A1.
  • This has a KoI- benboden, which consists of a ring field with several annular grooves and possibly a combustion bowl.
  • a piston shaft is arranged below the piston head, said piston shaft consists of two the piston in operation in the internal combustion engine bearing shaft wall sections, which serve to guide the piston in the cylinder of the internal combustion engine.
  • the shaft wall sections are connected to each other via past connecting walls, wherein the connecting walls have no connection to the running surface of the cylinder.
  • the connecting walls on a curved course, which may be convex, concave or a combination of these curvatures.
  • this known piston in the region of the connecting walls of the lower edge of the ring field over this protruding formed (supernatant) and there at least partially hollowed out, so that creates a free space in order to save weight.
  • the invention is based on the object to improve a generic piston in terms of its properties during operation in the internal combustion engine, in particular to increase its strength and durability.
  • a curved portion is provided in the interior of the piston at the transition from the pin bore in the direction of the shaft wall portion.
  • this construction can be continued to the effect that, starting from an annular groove of the ring field in the direction of the pin bore at least one compound is introduced into the piston.
  • This considerably improves the operation of the piston since the oil ring (possibly multi-part oil scraper ring) seated in the annular groove accumulates the oil present on the surface of the piston or on the surface of the cylinder wall and this is pressed into the connection and thus can be guided in the direction of the pin bore, there to cause lubrication of the bolt inserted into the pin bore.
  • This compound is particularly advantageous in the generic piston, as this already has a low weight and improved strength due to the curved connecting walls, the compound of the invention for lubricating the bolt inserted into the pin bore the durability of the entire assembly consisting of pistons, bolts and Connecting rod, much improved. Because the supply of oil from the direction of the surface of the piston in the direction of the pin bore, the bolt inserted there is lubricated and can not eat.
  • the bore according to the invention is either cast in and / or introduced by a drilling process (bore).
  • At least one rib for supporting the ring field is arranged in the free space behind the ring field.
  • the at least one rib advantageously has the effect that the projecting region of the annular field is effectively supported in the area of the connecting walls that are located behind, so that deformation of the piston during operation is largely reduced.
  • a rib is in each case right and left above the pin hole in the space available.
  • the ring field is supported on those areas to the right and left of the pin hole, which form a special stability.
  • influences of the movement of the bolt in the pin bore during the movement of the piston are not transmitted to the ring field, if just according to the invention in each case a rib is arranged right and left above the pin bore.
  • At least one drainage slot extending into the free space is present in the annular groove.
  • the clearance with the production of the piston blank (and optionally after subsequent further processing) is designed so that with introduction of the annular groove, in particular the lowermost annular groove, a connection is generated from the outside in the direction of the free space, just the sufficient in the free space drainage slot forms.
  • the drainage slot is automatically generated.
  • the introduced drainage slot causes the oil present on the surface of the piston or on the surface of the cylinder inner wall to be removed in the direction of the interior of the piston.
  • the position or the structural design of this Drainage slit has a higher fatigue strength compared to previously known oil wells. In addition, there is no interruption of the ring bearing surface, so that groove wear and oil consumption are thereby reduced.
  • the bolt bore has a lifting groove for a retaining ring (clamping ring) for the bolt, wherein the lifting groove is arranged below the free space and at the upper vertex of the pin bore.
  • the clearance makes it possible to arrange the lifting groove at the upper vertex of the pin bore. This has the advantage that the lifting groove is arranged in a region in which the strength of the piston is not impaired. This leads advantageously to an increase in mass-load safety.
  • the edge is rounded below the ring field in the region of the past connecting walls.
  • this is usually finished by means of machining, in particular turned off.
  • That the edge below the ring field in the region of the past connecting walls is very sharp and optionally identifies a ridge that can come during handling, in particular the assembly of the piston to injuries of the assembly staff.
  • this sharp edge is rounded below the ring field in an advantageous manner or has a rounding. This rounding can also be produced by machining, in particular a milling process.
  • Figures 1 to 3 each show a piston 1 of an internal combustion engine, which may be configured as a lightweight piston, but does not have to. If it is a lightweight piston, first a piston blank made of a lightweight material, in particular aluminum, poured and then finished by means of machining.
  • This piston 1 consists of a piston head 2 with an attached piston shaft 3, wherein the piston head 2 and the piston shaft 3 are integrally formed or consist of two parts, which are joined together after their preparation. Furthermore, the piston 1 has a ring field 4 with three annular grooves on the rule.
  • the piston shaft 3 consists of the piston 1 bearing shaft wall sections 5, wherein the shaft wall sections 5 are connected by past connecting walls 6 together.
  • the connecting walls 6 have a straight, arched or other course, with respect to the curved course of the composite walls 6 reference is made to the possible embodiments according to the patent claims 1 to 3 of DE 101 45 589 A1. Reference is made to this curved course (concave and / or convex from one skirt wall section to the other skirt wall section and / or in its course in the piston movement axis), since this process is particularly important in terms of weight saving while maintaining the required strength. Just as important but depending on the geometric design and purpose of the piston 1 straight connecting walls.
  • the past connecting walls 6 furthermore have a bolt bore 7 for receiving a bolt for connecting the piston 1 to a connecting rod (not shown).
  • connection 10 extends in the direction of the pin bore 7 in order to lubricate the pin (not shown) located there.
  • a connection 10 which is partly introduced from the direction of the annular groove 9 and partly from the direction of the piston skirt 3 in the direction of the piston crown 2.
  • the representation at the bottom right of Figure 1 is a section AA as shown in Figure 1 above right.
  • FIG. 2 shows the same piston 1 according to FIG. 1, wherein a rib 11 is arranged in each case above the pin bore 7 in the free space 8 to the right and left of the pin bore 7. These ribs 11 are used to support the ring field 4 during operation of the piston 1, so that the forces acting on the piston head 2 forces are introduced via the ribs 11 in the past connecting walls 6. Furthermore, it is shown in FIG. 2 that the bolt bore 7 has a lifting groove 12 for a retaining ring (clamping ring) for the bolt, the lifting groove 12 being arranged below the clearance 8 and at the upper vertex of the bolt bore 7. In the representation of FIG. 2, on the right, a drainage slot 13 is shown, its location and arrangement is also apparent when looking at the figure 3.
  • the drainage slot 13 is arranged in the region of the annular groove 9 so that a connection results from the annular groove 9 in the free space 8 when the annular groove 9 is introduced into the piston blank.
  • the region of the drainage slot 13 behind the annular groove 9, that is in the region of the free space 8, may be cup-shaped.
  • oil can be removed from the surface of the piston 1 or the cylinder running surface in the direction of the inner region of the piston 1 via the drainage slot 13.
  • connection 10 may extend from the annular groove 9 through the rib 11 in the direction of the pin bore 7.
  • curved areas 15 are provided in the inner area of the piston 1 and extend from the pin bore 7 in the direction of the shaft wall sections 5 (their inner surfaces). These curved areas 15 can have a continuous or unsteady course in the circumferential direction and / or in the course in the direction of the piston stroke axis and thus be adapted to the respective geometries of the inner area of the piston 1. These curved areas 15 can be introduced either by casting the piston 1 or by subsequent machining, in particular machining by means of milling.
  • the course and / or the extension of the arched area 15 also has the additional advantage that a free space is created in the interior area of the floor, which is necessary for the play requirements of a trapezoidal connecting rod, via which the piston can be connected to the crankshaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

L'invention concerne un piston (1) composé d'une tête de piston (2), présentant une zone de segmentation (4), et d'une tige de piston (3) placée sur cette tête, laquelle tige présente des sections de paroi de tige portantes (5) et des parois de liaison en amont (6), qui relient les sections de paroi de tige (5) et présentent une forme bombée ainsi qu'un alésage d'axe (7), un espace libre contre-dépouillé (8) étant formé dans la zone de la tête de piston (2) en dessous de la zone de segmentation (4) au niveau de l'alésage d'axe (7). Selon la présente invention, une zone bombée (15) est prévue à l'intérieur du piston (1) au niveau de la transition de l'alésage d'axe (7) en direction de la section de paroi de tige (5f).
EP06777082A 2005-08-29 2006-08-26 Piston de construction legere Ceased EP1920151A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005041001A DE102005041001A1 (de) 2005-08-29 2005-08-29 Leichtbaukolben
DE200510041002 DE102005041002A1 (de) 2005-08-29 2005-08-29 Leichtbaukolben
PCT/EP2006/008386 WO2007025686A1 (fr) 2005-08-29 2006-08-26 Piston de construction legere

Publications (1)

Publication Number Publication Date
EP1920151A1 true EP1920151A1 (fr) 2008-05-14

Family

ID=37397445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06777082A Ceased EP1920151A1 (fr) 2005-08-29 2006-08-26 Piston de construction legere

Country Status (6)

Country Link
US (1) US7954421B2 (fr)
EP (1) EP1920151A1 (fr)
JP (1) JP2009506259A (fr)
KR (1) KR20080063269A (fr)
BR (1) BRPI0615298A2 (fr)
WO (1) WO2007025686A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007020447A1 (de) * 2007-04-27 2008-10-30 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102007045465A1 (de) * 2007-09-24 2009-04-02 Federal-Mogul Nürnberg GmbH Kolben mit Ölversorgungsrinne für Nabenbohrungen
DE102007051711A1 (de) * 2007-10-30 2009-05-07 Ks Kolbenschmidt Gmbh Funktionsoptimierte Gestaltung von Kolben-Ringfeldbereichen
DE102009045437A1 (de) * 2009-10-07 2011-04-14 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor und Verbrennungsmotor mit einem Kolben
CN102959222B (zh) * 2010-06-29 2016-04-06 科尔本施密特有限公司 用于火花点火引擎的活塞
CN104246192B (zh) 2012-03-12 2017-02-15 费德罗-莫格尔公司 发动机活塞
RU2533265C2 (ru) * 2013-01-09 2014-11-20 Общество с ограниченной ответственностью "Краснодарский Компрессорный Завод" Дисковый литой поршень компрессора
DE102014114785A1 (de) * 2013-10-14 2015-04-16 Ks Kolbenschmidt Gmbh Kolben für eine Brennkraftmaschine und dessen Herstellungsverfahren
KR20160083067A (ko) * 2013-11-07 2016-07-11 페더럴-모걸 코오포레이숀 모놀리식 갤러리리스 피스톤 및 그 제작 방법
JP6242693B2 (ja) * 2014-01-16 2017-12-06 日立オートモティブシステムズ株式会社 内燃機関のピストン
DE102016201628A1 (de) * 2016-02-03 2017-08-03 Federal-Mogul Nürnberg GmbH Kolben aus Stahl- oder Grauguss für einen Verbrennungsmotor und Verfahren zur Herstellung eines Kolbens durch Stahl- oder Grauguss
US20170254291A1 (en) * 2016-03-02 2017-09-07 Federal-Mogul Llc Galleryless piston with slotted ring groove
CN110869600A (zh) 2017-04-19 2020-03-06 Ks科尔本施密特有限公司 具有一种结构形式的活塞
KR101977911B1 (ko) * 2017-08-17 2019-05-13 동양피스톤 주식회사 내연 기관용 피스톤 및 내연 기관용 피스톤의 제조 방법
EP3710686A1 (fr) * 2017-11-14 2020-09-23 KS Kolbenschmidt GmbH Piston en acier à design optimisé
CN114962052A (zh) * 2022-04-29 2022-08-30 山东双港活塞股份有限公司 适用于涡流室式柴油机的活塞

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61140257U (fr) * 1985-02-21 1986-08-30
DE4111368A1 (de) * 1990-07-07 1992-01-09 Mahle Gmbh Tauchkolben fuer verbrennungsmotoren
WO1993020369A1 (fr) * 1992-03-27 1993-10-14 Mahle Gmbh Piston alternatif d'un moteur a combustion interne
US5746169A (en) * 1994-09-08 1998-05-05 Mahle Gmbh Light-metal piston for highly stressed internal combustion engines
DE10227372A1 (de) * 2002-06-20 2004-01-15 Ks Kolbenschmidt Gmbh Kolben mit einer Ausnehmung zur Aufnahme von einem Schmiermittel
DE10255892A1 (de) * 2002-11-29 2004-06-09 Mahle Gmbh Kolben für einen Verbrennungsmotor

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3515035A (en) * 1968-07-05 1970-06-02 Brunswick Corp Piston pin lubrication
GB8824222D0 (en) * 1988-10-15 1988-11-23 Wellworthy Ltd Pistons
JP2529243Y2 (ja) * 1988-11-30 1997-03-19 株式会社小松製作所 ピストン
DE19740065A1 (de) * 1997-09-12 1999-03-18 Ks Kolbenschmidt Gmbh Leichtmetallkolben für Brennkraftmaschinen
JPH11303674A (ja) 1998-04-24 1999-11-02 Unisia Jecs Corp 内燃機関のピストン
JP2000179398A (ja) 1998-12-18 2000-06-27 Unisia Jecs Corp 内燃機関用ピストン
JP3548451B2 (ja) * 1999-02-22 2004-07-28 本田技研工業株式会社 ピストンのピン孔構造
JP2001295696A (ja) 2000-04-14 2001-10-26 Daihatsu Motor Co Ltd 内燃機関用ピストンの構造
JP3710679B2 (ja) 2000-04-14 2005-10-26 ダイハツ工業株式会社 内燃機関用ピストンの構造
DE10145589B4 (de) 2001-09-15 2006-09-14 Ks Kolbenschmidt Gmbh Kolben für eine Brennkraftmaschine
ATE305088T1 (de) * 2002-03-25 2005-10-15 Brp Rotax Gmbh & Co Kg Kolben
JP4177174B2 (ja) * 2003-05-29 2008-11-05 株式会社日立製作所 内燃機関用ピストン

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61140257U (fr) * 1985-02-21 1986-08-30
DE4111368A1 (de) * 1990-07-07 1992-01-09 Mahle Gmbh Tauchkolben fuer verbrennungsmotoren
WO1993020369A1 (fr) * 1992-03-27 1993-10-14 Mahle Gmbh Piston alternatif d'un moteur a combustion interne
US5746169A (en) * 1994-09-08 1998-05-05 Mahle Gmbh Light-metal piston for highly stressed internal combustion engines
DE10227372A1 (de) * 2002-06-20 2004-01-15 Ks Kolbenschmidt Gmbh Kolben mit einer Ausnehmung zur Aufnahme von einem Schmiermittel
DE10255892A1 (de) * 2002-11-29 2004-06-09 Mahle Gmbh Kolben für einen Verbrennungsmotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007025686A1 *

Also Published As

Publication number Publication date
KR20080063269A (ko) 2008-07-03
WO2007025686A1 (fr) 2007-03-08
BRPI0615298A2 (pt) 2011-05-17
JP2009506259A (ja) 2009-02-12
US7954421B2 (en) 2011-06-07
US20080264247A1 (en) 2008-10-30

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