EP1828587A1 - Piston refroidi et en plusieurs parties destine a un moteur a combustion interne - Google Patents

Piston refroidi et en plusieurs parties destine a un moteur a combustion interne

Info

Publication number
EP1828587A1
EP1828587A1 EP05816542A EP05816542A EP1828587A1 EP 1828587 A1 EP1828587 A1 EP 1828587A1 EP 05816542 A EP05816542 A EP 05816542A EP 05816542 A EP05816542 A EP 05816542A EP 1828587 A1 EP1828587 A1 EP 1828587A1
Authority
EP
European Patent Office
Prior art keywords
piston
cooling channel
channel cover
radially
tongue
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
EP05816542A
Other languages
German (de)
English (en)
Other versions
EP1828587B1 (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 International GmbH
Original Assignee
Mahle International 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 International GmbH filed Critical Mahle International GmbH
Publication of EP1828587A1 publication Critical patent/EP1828587A1/fr
Application granted granted Critical
Publication of EP1828587B1 publication Critical patent/EP1828587B1/fr
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 
    • 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 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together

Definitions

  • the invention relates to a multi-part cooled piston according to the preamble of claim.
  • a multi-part, cooled piston of the above type is known from Offenlegungs DE 102 57 022.
  • a molded into the piston upper part of the cooling channel is closed by a piston lower part.
  • the disadvantage here is that for this purpose, the lower piston part in the region of the cooling channel must have a special shape, which leads to a significant increase in the cost of piston production.
  • pistons made in this way have a relatively large weight.
  • DD 252 638 and DE 41 37 126 refer to the arranged in the piston upper part cooling channel by means of a cover spring or a cover ring.
  • DD 252 638 proposes to provide the annular cooling channel cover with a radially arranged gap and to insert under prestress in a groove provided for this by reducing the gap when inserting the cooling channel cover with a special pliers and thus the radius of the cooling channel cover become.
  • a relatively large risk of twisting the cooling channel cover is still given because of the considerable mass forces occurring.
  • a better anti-rotation offers the structural design of the cover ring described in DE 41 37 126, which are formed in its radially outer edge recesses.
  • the cover ring is thereby fixed in the piston, that its radially outer edge is inserted into a groove which is located on the inside of an annular wall.
  • webs are incorporated, which engage after the 'insertion of the ring in the recesses and thereby prevent twisting of the cover ring.
  • This type of anti-rotation but is very expensive, since in this case first a circumferential groove must be milled into the inside of the ring wall. Then the webs must be worked into the groove at the designated places.
  • the cooling channel cover is installed absolutely secure against rotation in the piston by a tongue is punched in the radially linear portion of a plate spring-shaped cooling channel cover, and this tongue is slightly bent, so that they are molded into a recess formed in the piston outer side can intervene.
  • FIG. 1 shows a piston in a two-part sectional view, the left half of a section through the piston along a longitudinal axis of a hub bore and the right half of a 90 ° offset to this section through the piston,
  • FIG. 3 shows a part of the cooling channel cover, which shows a tongue formed by two juxtaposed punch-outs
  • FIG. 4 shows a section through the cooling channel cover in the region of the tongue along the line CC in Fig. 3, 5 shows a partial section along the line AA in Figure 2 in the region of the hub support, in which a recess for receiving the tongue of the cooling channel cover is formed, and
  • Fig. 6 is a partial section along the line BB in Fig. 2, showing a part of resting on a projection of the hub support cooling duct cover, the tongue engages in the recess of the hub support.
  • a multi-part, cooled piston 1 which consists of a piston upper part 2 with a combustion bowl 3 in the piston head 30 and an annular wall 4 with ring portion 5 in the radially outer piston region and a piston lower part 6, which has a box-shaped piston shaft 7 and two associated pin bosses 8 each having a pin bore 9 for receiving a piston pin, not shown in the figure.
  • the piston upper part 2 has an outer annular cooling channel 10 and a concentric inner cooling channel 1 1, wherein the outer cooling channel 10 is closed by a plate spring-like, slightly conical and designed as a one-piece, closed ring cooling channel cover 12, not in the figures having openings shown for introducing and discharging cooling oil.
  • the outer cooling channel 10 is connected via at least one overflow channel 13 with the inner cooling channel 11. This overflow channel 13 may be formed as a bore.
  • the inner cooling channel 11 has at least one drain hole 14 through which the cooling oil from the inner cooling channel 1 1 can leak.
  • the upper piston part 2 is mounted on an upper bearing surface 16 of an annular hub support 17 of the lower piston part 6 via an annular bearing surface 15, which is arranged on the underside of the piston upper part 2 facing away from the combustion bowl 3.
  • the piston upper part 2 On the underside facing away from the combustion bowl 3, the piston upper part 2 has a bolt 19 arranged centrally and coaxially with the piston axis 18, the end 20 of which is provided with a thread 21.
  • the upper piston part 2 is made of steel and can either be forged or manufactured by continuous casting.
  • the piston base 6 is preferably forged from steel.
  • Fig. 2 of the plate spring-like cooling channel cover 12 closed cooling channel 10 is shown enlarged, so that it can be seen that the radially outer portion 12 'of the cooling channel cover 12 in a radially inner, stepped recess 27 superimposed in the hub-facing end face 26 of the annular wall 4 and that the radially inner portion 12 "of the cooling channel cover 12 rests on a projection 29 integrally formed on the hub support 17. Further, it can be seen that the inner portion 12" of the cooling channel cover 12 has a hub-bent tongue 25, which is in a engages radially outwardly into the projection 29 recess 28, thereby securing the cooling duct cover 12 to achieve against rotation during assembly and engine operation.
  • FIG. 3 shows a plan view of a part of the cooling channel cover 12, in the inner region 12 "of two juxtaposed punched-out sections 29 and 30, the tongue 25 is formed, which, as shown in FIG , a sectional view of the cooling channel cover 12 along the line CC in Fig. 3, shows, is bent away from the fictitious plane formed by the cooling channel cover 12 and with the inner Beeich 12 "of the cooling channel cover 12 includes an acute angle D. 5, a partial section through the hub support 17 (without representation of the cooling channel cover 12) along the line AA in Fig. 2, shows the shape and arrangement of the molded in the radial outer side of the hub support 17 recess 28 for receiving the tongue 25th
  • Fig. 6 a section along the line BB in Fig. 2, it can be seen how the cooling channel cover 12 rests on the formed on the hub support 17 projection 29, wherein the tongue 25 engages in the recess 28 to a rotation of the cooling channel cover 12 important, especially at assemblage of the piston 1.
  • the plate-spring-shaped cooling channel cover 12 is placed on the lower piston part such that, as shown in Fig. 6, the tongue 25 engages in the recess 28.
  • the upper piston part 2 is screwed onto the lower piston part 6, wherein the threaded bolt 19 of the piston upper part 2 is screwed into the threaded bore 23 of the region 22.
  • the elasticity of the relatively thin-walled region 22 causes it to deform like a disk spring when the upper and lower piston parts 2, 6 are screwed together and bulges the inner center of the region 22, which is provided with the threaded bore 23, in the direction of the piston upper part 2.
  • the conical shape of the cooling channel cover 12 is more pronounced in the relaxed state than in the installed state.
  • the taper of the cooling channel cover 12 is reduced, that is, the shape of the cooling channel cover 12 is flatter, and in the cooling channel cover 12th a bias voltage is generated, which ensures after the final assembly of the piston 1, that the cooling channel cover 12 partly in the recess 27 of the end face 26 " and partly rests firmly on the projection 29, and that a secure and firm installation of the cooling channel cover 12 in the piston 1 also ensured in fast reciprocating movements of the piston 1, which are common in engine operation.

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) en plusieurs parties et refroidi destiné à un moteur à combustion interne. La face inférieure opposée au fond de piston (30) présente un canal de refroidissement (10) annulaire radialement externe. Ce canal de refroidissement est fermé par un couvercle (12) ayant la forme d'un anneau. Le couvercle de canal de refroidissement (12) présente dans la zone radialement interne (12') une languette (25) qui s'encliquète dans un évidement (28) formé dans l'élément inférieur (6) du piston et ainsi empêche que le couvercle (12) du canal de refroidissement n'exécute des rotations par rapport au piston (1) lors du montage et en mode fonctionnement.
EP05816542A 2004-11-30 2005-11-28 Piston refroidi et en plusieurs parties destine a un moteur a combustion interne Expired - Lifetime EP1828587B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004057624A DE102004057624A1 (de) 2004-11-30 2004-11-30 Mehrteiliger, gekühlter Kolben für einen Verbrennungsmotor
PCT/DE2005/002143 WO2006058524A1 (fr) 2004-11-30 2005-11-28 Piston refroidi et en plusieurs parties destine a un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1828587A1 true EP1828587A1 (fr) 2007-09-05
EP1828587B1 EP1828587B1 (fr) 2010-02-10

Family

ID=35966440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05816542A Expired - Lifetime EP1828587B1 (fr) 2004-11-30 2005-11-28 Piston refroidi et en plusieurs parties destine a un moteur a combustion interne

Country Status (6)

Country Link
US (1) US7743745B2 (fr)
EP (1) EP1828587B1 (fr)
JP (1) JP5026983B2 (fr)
BR (1) BRPI0518704A2 (fr)
DE (2) DE102004057624A1 (fr)
WO (1) WO2006058524A1 (fr)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005041409A1 (de) * 2005-09-01 2007-03-08 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102005042003A1 (de) * 2005-09-05 2007-03-08 Mahle International Gmbh Gebauter, flüssigkeitsgekühlter Kolben
DE102006002949A1 (de) * 2006-01-21 2007-08-02 Ks Kolbenschmidt Gmbh Kühlkanalkolben für eine Brennkraftmaschine
DE102006045728A1 (de) * 2006-09-27 2008-04-03 Mahle International Gmbh Einteiliger Kolben für einen Verbrennungsmotor
DE102007027162A1 (de) 2007-06-13 2008-12-18 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102007031400A1 (de) * 2007-07-05 2009-01-08 Ks Kolbenschmidt Gmbh Einteiliger Kühlkanalkolben mit zwei miteinander verschraubten Kolbenteilen
JP4510061B2 (ja) * 2007-09-18 2010-07-21 理研鍛造株式会社 内燃機関用ピストンの製造方法
FR2925604A1 (fr) * 2007-12-19 2009-06-26 Renault Sas Chambre de combustion pour moteur thermique a injection directe suralimente
DE102008055848A1 (de) * 2008-11-04 2010-05-06 Ks Kolbenschmidt Gmbh Kühlkanalkolben einer Brennkraftmaschine mit einem Verschlusselement, das den Kühlkanal verschließt
DE102008056203A1 (de) * 2008-11-06 2010-05-12 Mahle International Gmbh Mehrteiliger Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
DE102008062219A1 (de) * 2008-12-13 2010-06-17 Mahle International Gmbh Kolben für einen Verbrennungsmotor
US8807109B2 (en) * 2009-11-06 2014-08-19 Federal-Mogul Corporation Steel piston with cooling gallery and method of construction thereof
JP5575926B2 (ja) * 2010-06-29 2014-08-20 コルベンシュミット株式会社 火花点火式エンジンのピストン
PL2595771T3 (pl) * 2010-07-19 2017-07-31 Ks Kolbenschmidt Gmbh Sposób wytwarzania tłoka z kanałem chłodzącym dla silników spalinowych i tak wytworzony tłok
US9856820B2 (en) * 2010-10-05 2018-01-02 Mahle International Gmbh Piston assembly
DE102010056218A1 (de) * 2010-12-24 2012-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102010056220A1 (de) * 2010-12-24 2012-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102011013113A1 (de) 2011-03-04 2012-09-06 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
US9464592B2 (en) 2011-04-18 2016-10-11 Achates Power, Inc. Piston thermal management in an opposed-piston engine
DE102011106559A1 (de) * 2011-07-05 2013-01-10 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102011119525A1 (de) * 2011-11-26 2013-05-29 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102012014192A1 (de) * 2012-07-18 2014-01-23 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102012213558A1 (de) * 2012-08-01 2014-02-06 Mahle International Gmbh Kolben
US9228480B2 (en) 2014-06-06 2016-01-05 Mahle Industries, Incorporated Piston crown cooling gallery insert
DE102014015947A1 (de) * 2014-10-30 2016-05-19 Mahle International Gmbh Kühlkanalabdeckung sowie mit einer Kühlkanalabdeckung versehener Kolben
DE102016114954A1 (de) * 2015-08-11 2017-02-16 Ks Kolbenschmidt Gmbh Verfahren zur Herstellung eines Monoblock-Kolbens und Monoblock-Kolben
FR3040745B1 (fr) * 2015-09-04 2018-07-13 Soc De Motorisations Aeronautiques Ensemble pour moteur a combustion interne comprenant un piston et une plaque de fermeture d'une galerie de refroidissement du piston
JP2017089471A (ja) * 2015-11-09 2017-05-25 いすゞ自動車株式会社 スチールピストン、スチールピストンの冷却方法、及びスチールピストンの製造方法
DE102016225635A1 (de) * 2016-12-20 2018-06-21 Mahle International Gmbh Kolben einer Brennkraftmaschine
DE102018201556A1 (de) * 2018-02-01 2019-08-01 Volkswagen Aktiengesellschaft Hubkolben für eine Hubkolbenbrennkraftmaschine und Verwendung eines Hubkolbens in einer Hubkolbenbrennkraftmaschine

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Also Published As

Publication number Publication date
EP1828587B1 (fr) 2010-02-10
JP2008522088A (ja) 2008-06-26
BRPI0518704A2 (pt) 2008-12-02
DE102004057624A1 (de) 2006-06-01
WO2006058524A1 (fr) 2006-06-08
US20080121204A1 (en) 2008-05-29
JP5026983B2 (ja) 2012-09-19
DE502005009010D1 (de) 2010-03-25
US7743745B2 (en) 2010-06-29

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