EP1642017B1 - Piston de moteur a combustion interne - Google Patents

Piston de moteur a combustion interne Download PDF

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Publication number
EP1642017B1
EP1642017B1 EP04738618A EP04738618A EP1642017B1 EP 1642017 B1 EP1642017 B1 EP 1642017B1 EP 04738618 A EP04738618 A EP 04738618A EP 04738618 A EP04738618 A EP 04738618A EP 1642017 B1 EP1642017 B1 EP 1642017B1
Authority
EP
European Patent Office
Prior art keywords
piston
annular element
piston base
projection
annular
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.)
Expired - Lifetime
Application number
EP04738618A
Other languages
German (de)
English (en)
Other versions
EP1642017A1 (fr
Inventor
Rainer Scharp
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
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP1642017A1 publication Critical patent/EP1642017A1/fr
Application granted granted Critical
Publication of EP1642017B1 publication Critical patent/EP1642017B1/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 
    • F02F3/0015—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 
    • F02F3/16—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 
    • 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 
    • F02F2003/0007—Monolithic pistons; One piece constructions; Casting of pistons

Definitions

  • the invention relates to a piston for an internal combustion engine according to the preamble of claim 1.
  • a piston for an internal combustion engine which consists of a piston body with pin bosses and with a box-shaped shaft.
  • an annular member is welded, in the outside of which a part of the ring part is incorporated, and the upper part is designed as a firing bar.
  • the component forms, together with the piston bottom side part of the piston main body an annular cooling channel, which is closed by a molded to the piston body, circumferential wall to the hub side.
  • the annular member is welded via each of its two end faces with the piston body, which makes the production of the piston known from the prior art very time consuming and labor-intensive.
  • the invention is based on the problem to simplify the manufacturing process of a piston equipped with a cooling channel to accelerate and thus cheaper.
  • An expedient embodiment of the invention is the subject of the dependent claim. This results in a quick and easy to produce screw between a piston body and a ring member, which receives high strength by the mechanical stress under which an elastically formed projection sets the ring member.
  • Fig. 1 shows a piston 1 for an internal combustion engine in a sectional view, which consists of two halves, of which the left half represents a section of the piston 1 along a longitudinal axis 2 of a hub bore 3 and the right half offset by 90 ° thereto longitudinal section of the piston 1.
  • the piston 1 consists of a piston body 4, with a piston element on the bottom side 5, a ring member 6 is screwed, which carries a top land 7 and a ring portion 8 of the piston 1.
  • the piston body 4 and the ring member 6 are made of steel.
  • the piston main body 4 is formed in one piece and has a combustion bowl 10 in the region of the piston head 9.
  • a respective hub support 11, 11 ' two pin bosses 12, 12' each having a hub bore 3, 3 'are integrally formed on the piston head 9, whose end faces 16 are set back relative to the ring member 6 in the direction of the piston longitudinal axis 17.
  • the pin bosses 12, 12 ' are connected to each other via shaft elements 13, 13'.
  • a carrier of the ring member 6 and a piston body 4 may be used, in which the end faces 16 of the pin bosses 12, 12 'are arranged not reset relative to the ring section 8.
  • the recess 18 over the entire circumference of the piston partly between the Shaft members 13, 13 'and the ring member 6 and partly between the pin bosses 12, 12' and the ring member 6 circumferentially arranged.
  • the piston body 4 forms in the region of the piston head 9 together with the ring member 6 an annular cooling channel 14, which is partly incorporated in the piston body 4 and partly in the ring member 6.
  • the cooling channel 14 is covered by a projection 15 of the piston body 4, which is formed like a plate spring and is arranged starting from the piston body 4 in the direction of the piston head 9 inclined. It can be seen in Fig. 1 also a drain opening 20 of the cooling channel 14th
  • Fig. 2 makes a section across the piston 1 along the line AA in Fig. 1 in which the pin bosses 12, 12 'facing side of the piston head 9 can be seen in a bottom view.
  • Fig. 2 shows an inlet opening 19 and the discharge opening 20 of the not recognizable in the selected form of representation cooling channel 14 for cooling the piston 1 provided cooling liquid. Hatched are the shaft elements 13, 13 'and the associated pin bosses 12, 12' shown. To recognize are in Fig. 2
  • the projection 15, which is visible in the region of the recessed end faces 16 of the pin bosses 12, 12 'in a bottom view, and the lower end face 21 of the ring element. 6
  • the thread 5 can be provided with a ceramic sealant for the purpose of improved sealing of the screw first, before the ring member 6 is screwed via the thread 5 on the prefabricated piston body 4.
  • the lower end face 21 of the ring member 6 comes into contact with the surface 25 of the projection 15, which in the present embodiment is flat, ie, plateau-like, but may also be roof, or dish-shaped or may have a spherical shape.
  • the projection 15 is formed so thin-walled that it elastically yields when screwing the ring member 6 when it exerts a pressure on the projection 15. After screwing the ring element 6, the projection 15 thus sets the ring element 6 under mechanical stress, which improves the strength the screw connection between the ring element 6 and the bottom region of the piston main body 4 contributes.
  • the lower end face 21 of the ring element 6 is provided with a recess 24 which has on its inside a radially oriented surface 22 and subsequently on its outside an axially aligned surface 23.
  • the axially lying surface 23 is screwed into the lower end face 21 of the ring member 6 in the radial direction so far that, as in Fig.
  • a radial clearance 27 results when screwing the ring member 6 on the piston 1, the radially oriented surface 22 of the lower end face 21 of Ring element 6 comes into first contact with the surface 25 of the projection 15.
  • the radial width of this radial clearance is in this case between 0 .mu.m and 300 .mu.m.
  • the elastic compliance of the projection 15 results in further screwing the ring member 6 to the fact that the upper portion of the projection 15 moves in the direction of arrow 28 until the outer boundary surface 26 of the projection 15 to the axially aligned surface 23 of the recess 24 in Stop comes. This contributes to an improvement in the strength of the screw connection and the rigidity of the upper piston area.

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)

Abstract

L'invention concerne un piston (1) de moteur à combustion interne, ce piston étant constitué par un corps principal (4), sur lequel est vissé un élément annulaire (6) qui forme, avec le corps principal (4) du piston un canal de refroidissement (14) annulaire fermé par un épaulement (15) dudit corps principal (4) en direction des moyeux d'axes (12, 12'). Cet épaulement (15), en forme de rondelle-ressort élastique, se déforme lorsque l'élément annulaire (6) est vissé et contribue ainsi à la résistance de l'assemblage par vis.

Claims (2)

  1. L'Invention concerne un piston (1) pour un moteur à explosion
    - doté d'un corps de base (4) en acier forgé, comprenant deux moyeux d'axe (12,12') qui sont reliés chacun avec la base de piston (9) par un support de moyeu (11,11') et qui sont reliés entre eux par deux éléments d'arbre (13, 13') disposés sur la base de piston (9), et
    - comprenant un élément annulaire (6) qui forme la partie radiale extérieure de la base de piston (9), la couronne de piston (7), au moins un élément de la partie annulaire (8) et un canal de refroidissement (14) annulaire avec le corps de base (4),
    les bords extérieurs (16) des moyeux d'axe (12,12') sont reculés par rapport à la surface périphérique du cylindre de piston et des évidements (18) sont formés entre les éléments d'arbre (13, 13') et la partie supérieure du piston (1) portant l'élément annulaire (6) de telle façon qu'une partie saillante (15) périphérique est obtenue pour former conjointement avec l'élément annulaire (6) une délimitation radialement extérieure et axialement inférieure du canal de refroidissement (14),
    caractérisée par le fait
    - que l'élément annulaire (6) est vissé avec le corps de base (4), et
    - que la partie saillante (15) est réalisée sous la forme d'un anneau de support élastique ou d'une rondelle conique qui ne se déforme pas lors du dévissage de l'élément annulaire (6).
  2. Piston (1) pour un moteur à explosion selon la revendication 1, caractérisé par le fait que le bord (21) de l'élément annulaire (6) faisant face aux moyeux d'axe (12, 12') comporte un évidement (24) dirigé vers l'intérieur avec une surface (22) intérieure disposée radialement et une surface alignée (23) disposée axialement en direction des moyeux d'axe (12, 12'), et que les surfaces de délimitation (25, 26) de la partie saillante (15) faisant face à la base de piston (9) restent adjacentes aux surfaces (22, 23) de l'évidement (24) après le dévissage de l'élément annulaire (6).
EP04738618A 2003-06-07 2004-06-07 Piston de moteur a combustion interne Expired - Lifetime EP1642017B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10325914A DE10325914B4 (de) 2003-06-07 2003-06-07 Kolben für einen Verbrennungsmotor
PCT/DE2004/001164 WO2004111420A1 (fr) 2003-06-07 2004-06-07 Piston de moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1642017A1 EP1642017A1 (fr) 2006-04-05
EP1642017B1 true EP1642017B1 (fr) 2011-05-11

Family

ID=33482690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04738618A Expired - Lifetime EP1642017B1 (fr) 2003-06-07 2004-06-07 Piston de moteur a combustion interne

Country Status (9)

Country Link
US (1) US6938537B2 (fr)
EP (1) EP1642017B1 (fr)
JP (1) JP4365409B2 (fr)
KR (1) KR101142238B1 (fr)
CN (1) CN100412345C (fr)
BR (1) BRPI0411090B1 (fr)
DE (1) DE10325914B4 (fr)
HK (1) HK1088941A1 (fr)
WO (1) WO2004111420A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10340292A1 (de) * 2003-09-02 2005-04-14 Mahle Gmbh Kolben für einen Verbrennungsmotor
DE102005044597A1 (de) * 2005-09-17 2007-03-29 Mahle International Gmbh Kolben für einen Verbrennungsmotor
US20070295299A1 (en) * 2006-06-12 2007-12-27 Mahle Technology, Inc. Piston for a combustion engine
US20070283917A1 (en) * 2006-06-12 2007-12-13 Lapp Michael T Piston for a combustion engine
DE102007027162A1 (de) * 2007-06-13 2008-12-18 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102007036236A1 (de) * 2007-08-02 2009-02-05 Mahle International Gmbh Gebauter Kolben
DE102008038325A1 (de) 2007-12-20 2009-06-25 Mahle International Gmbh Verfahren zum Befestigen eines Ringelementes auf einem Kolben für einen Verbrennungsmotor
DE102008045456A1 (de) * 2008-09-02 2010-03-04 Mahle International Gmbh Kolben für einen Verbrennungsmotor
WO2011064853A1 (fr) * 2009-11-25 2011-06-03 トヨタ自動車株式会社 Piston pour moteur à combustion interne et moteur à combustion interne
US8776670B2 (en) * 2010-02-17 2014-07-15 Mahle International Gmbh Piston assembly
BR112015005723A2 (pt) * 2012-09-27 2017-07-04 Ks Kolbenschmidt Gmbh pistão construído em duas peças de uma máquina de combustão interna
DE102014000253A1 (de) * 2014-01-08 2015-07-09 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
EP3452712A1 (fr) 2016-05-04 2019-03-13 KS Kolbenschmidt GmbH Piston

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE278074C (fr) *
GB186060A (en) * 1921-09-17 1923-02-22 Christian Bergh Backer Improvements in or relating to pistons
US1723823A (en) * 1926-03-15 1929-08-06 Perfect Circle Co Piston
DE589409C (de) * 1930-11-02 1933-12-14 Elektronmetall G M B H Kolben fuer Brennkraftmaschinen
US2244008A (en) * 1939-06-16 1941-06-03 Gen Motors Corp Piston construction
US2772933A (en) 1955-06-22 1956-12-04 Alco Products Inc Pistons
DE1049174B (de) * 1956-10-25 1959-01-22 Mahle Kg OElgekuehlter Kolben, insbesondere fuer Brennkraftmaschinen
US3190273A (en) * 1964-01-03 1965-06-22 Continental Aviat & Eng Corp Piston for internal combustion engine
DE1245640B (de) * 1964-11-25 1967-07-27 Mahle Kg Kolben fuer Brennkraftmaschinen
DK112141B (da) * 1966-07-12 1968-11-11 Burmeister & Wains Mot Mask Stempel, navnlig til forbrændingsmotorer.
DE2140824C2 (de) * 1971-08-14 1983-06-01 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Ölgekühlter Kolben für Brennkraftmaschinen
DE2348870A1 (de) 1973-09-28 1975-04-10 Maschf Augsburg Nuernberg Ag Mehrteiliger kolben fuer brennkraftmaschinen, insbesondere grossdieselmotoren
DD123962A1 (fr) * 1975-12-24 1977-01-26
GB1588515A (en) * 1976-09-02 1981-04-23 Ass Eng Ltd Pistons
DE2914456A1 (de) * 1979-04-10 1980-10-23 Schmidt Gmbh Karl Gebauter kolben fuer brennkraftmaschinen
US4286505A (en) * 1979-04-23 1981-09-01 Caterpillar Tractor Co. Oil cooled piston
DE3338419A1 (de) * 1983-10-22 1985-05-02 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Kolben fuer eine hubkolbenbrennkraftmaschine
IT1240526B (it) * 1990-07-31 1993-12-17 Borgo Nova S.P.A. Perfezionamento relativo a pistoni, in genere.
DE4208037C2 (de) * 1992-03-13 1998-03-26 Mahle Gmbh Mehrteiliger, gekühlter Kolben für Verbrennungsmotoren
US6003479A (en) * 1997-05-12 1999-12-21 Evans; Mark M. Piston construction
DE19846152A1 (de) * 1998-10-07 2000-04-13 Mahle Gmbh Kolben mit Kolbengrundkörper aus geschmiedetem Stahl und einem Kühlkanal
US6286414B1 (en) * 1999-08-16 2001-09-11 Caterpillar Inc. Compact one piece cooled piston and method
US6327962B1 (en) * 1999-08-16 2001-12-11 Caterpillar Inc. One piece piston with supporting piston skirt
DE10047258C2 (de) * 2000-09-23 2003-02-06 Ks Kolbenschmidt Gmbh Kolben mit sich am Basisteil abstützenden und angeschweißtem Ringabschnitt
JP3714170B2 (ja) * 2001-02-05 2005-11-09 日本電気株式会社 オンラインショッピング決済方法及びそのシステム並びにオンラインショッピング決済プログラム

Also Published As

Publication number Publication date
EP1642017A1 (fr) 2006-04-05
JP2006527326A (ja) 2006-11-30
US20040244581A1 (en) 2004-12-09
JP4365409B2 (ja) 2009-11-18
BRPI0411090B1 (pt) 2015-05-12
DE10325914B4 (de) 2012-08-02
HK1088941A1 (en) 2006-11-17
DE10325914A1 (de) 2004-12-23
BRPI0411090A (pt) 2006-07-25
CN1802498A (zh) 2006-07-12
US6938537B2 (en) 2005-09-06
CN100412345C (zh) 2008-08-20
KR20060014443A (ko) 2006-02-15
WO2004111420A1 (fr) 2004-12-23
KR101142238B1 (ko) 2012-05-07

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