EP2288800A1 - Piston pour moteur à combustion interne - Google Patents

Piston pour moteur à combustion interne

Info

Publication number
EP2288800A1
EP2288800A1 EP09765817A EP09765817A EP2288800A1 EP 2288800 A1 EP2288800 A1 EP 2288800A1 EP 09765817 A EP09765817 A EP 09765817A EP 09765817 A EP09765817 A EP 09765817A EP 2288800 A1 EP2288800 A1 EP 2288800A1
Authority
EP
European Patent Office
Prior art keywords
piston
level
cooling channel
outflow
axis
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
EP09765817A
Other languages
German (de)
English (en)
Other versions
EP2288800B1 (fr
Inventor
Marcus Freidhager
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.)
Federal Mogul Nuernberg GmbH
Original Assignee
Federal Mogul Nuernberg 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 Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH
Priority to PL09765817T priority Critical patent/PL2288800T3/pl
Publication of EP2288800A1 publication Critical patent/EP2288800A1/fr
Application granted granted Critical
Publication of EP2288800B1 publication Critical patent/EP2288800B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/105—Salt cores
    • 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

Definitions

  • the invention relates to a piston for an internal combustion engine.
  • WO 03/098022 relates to a piston in which the cooling channel widens continuously from the inlet to the outlet in the direction of a lower level. Presentation of the invention
  • the invention has for its object to provide a piston for an internal combustion engine, which is improved in terms of cooling, in particular the critical areas.
  • this has at least one cooling channel which is located exclusively in the region of at least one inlet and at least one outlet at a comparatively low level, which is comparatively remote from the piston crown, and moreover at a consistently higher level, which is comparatively closer to the piston crown.
  • the cooling channel in its predominant course, can be particularly close to the critical points, e.g. the trough edge and the uppermost annular groove are formed.
  • the cooling channel can be largely completely at the level of a ring carrier, so that this critical region can be cooled particularly efficiently. This applies equally to the area of the combustion bowl which adjoins in the direction of the axis of rotation of the piston.
  • the cooling channel in the piston according to the invention can be formed largely completely at the level of the combustion bowl, so that a particularly good cooling effect takes place here.
  • the requirements for the flow and outflow in the piston according to the invention can be particularly well taken into account.
  • the cross-section of the cooling channel is slightly larger than its remaining course in order to ensure a favorable inflow and outflow.
  • a m this way enlarged inflow and outflow can in the erfindungsgeraa touch piston thereby be formed particularly simple that the Kuhlkanal is in the range of at least one inlet and at least one outflow on a lower, that is farther from the piston crown level.
  • the cooling channel is thus slightly lowered in these zones from the region between the uppermost annular groove and the combustion bowl, so that the cross-sectional enlargement of the cooling channel can be provided without endangering the strength. Namely, a sufficient material thickness can be maintained both to the uppermost annular groove and to the combustion bowl in order to continue to meet the strength requirements.
  • the cooling channel is located only in the region of the inlet and at least one outflow at the lower level, and remains at substantially the same, higher level, can be over largely the entire circumference of a particularly efficient cooling of the critical areas at the top Ring groove and the combustion chamber recess are guaranteed.
  • the cooling channel may have additional flows and outflows.
  • one or more drains preferably with a comparatively small cross-section, may be provided in its course, in order to lubricate the bearing between connecting rod and piston pin. In the area of these outflows, however, the cooling channel does not necessarily have to go to the lower level because no broadening is necessary here.
  • the cross-section of the cooling channel in the area of at least one inflow and / or outflow be enlarged relative to the remainder of the cooling channel.
  • a gradual, inclined rise is provided with kinks or steps between, for example, the inclined rise and the higher or lower level area.
  • Those portions of the cooling channel that are at the lower level, including the inclined transitions to the higher level, may each include an angle of about 50-70 degrees, more preferably about 60-65 degrees.
  • the cross-sectional shape of the cooling channel is currently preferred that this is largely oval, with the longer axis of the oval extends substantially in the direction of the axis of rotation of the piston, but may be slightly inclined relative to this.
  • this inclination is currently an angle of about 7 ° and / or a slope, which is directed at the top to the outside, preferred. Due to the generally oval design, efficient cooling of the area "between" upper annular groove and combustion bowl can be ensured, and at the same time the necessary material thicknesses are maintained. The inclination supports this effect in view of the typical shape of a combustion bowl.
  • inflow and outflow be diametrically opposed.
  • the piston can be installed in any orientation, and any opening can be used as an outlet or drain.
  • Fig. 1 is a perspective view of a salt core used in the manufacture of the piston according to the invention Wxrd;
  • FIG. 2 is a side sectional view of a portion of the salt core shown in FIG. 1; FIG. and
  • Fig. 3 is a sectional view of the inventive piston.
  • Fig. 1 m is first shown a perspective view of the salt core 20, which is used for the preparation of the inventive piston.
  • the salt core as is true for the later Kuhlkanal, in the embodiment shown on two diametrically opposite regions, which are widened in cross section with respect to the rest of the cooling channel and later be used as inflow and outflow 14.
  • the Cooling channel in the region of inflow and outflow 14 at a lower level than the rest of the cooling channel.
  • the areas of the cooling channel at the higher level in each case in the vicinity of the inflow and outflow 14 and on both sides of the same by sloping 18 from the higher 16 to the lower level 12 over.
  • the broadening of the cross-section in the said embodiment takes place in the direction of the axis of rotation 22 (see Fig. 2).
  • the two levels 12 and 16, as well as in the region of the inflow or outflow 14 shown, the slopes 18 are further recognizable.
  • the cross section of the cooling channel with the exception of the enlarged area at the inlet and outlet, but including the slopes 18 remains largely the same.
  • the cross section is largely oval, with the longer axis extending substantially parallel or possibly at an acute angle to the axis of rotation 22 of the piston.
  • an angle ⁇ of, for example, about 7 ° is formed between the axis of rotation 22 of the piston and the longer axis of the oval, which forms the cross section of the cooling channel.
  • Fig. 3 can be seen in addition to how the Kuhlkanal 24 can be brought by the erfindungsgerniere measure in a favorable manner to the level of a ring carrier 26 and the combustion bowl 28.
  • the cooling channel 24 fits into the region between the annular carrier 26 and the combustion bowl 28 and can cool these critical zones particularly efficiently without jeopardizing the strength due to material thicknesses which are too low.
  • the cooling channel 24 is largely at the level of the lower edge of the annular carrier 26 and even slightly above the bottom of the combustion bowl 28 with respect to its lower edge located.
  • the areas of inflow and outflow can be increased even in the design of FIG. 3, without jeopardizing the material thickness between ring carrier 26 and combustion bowl 28, since the cooling channel 24 in these areas the lower level 12 is lowered.

Landscapes

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

Abstract

La présente invention concerne un piston (10) pour moteur à combustion interne, lequel piston présente au moins un canal de refroidissement (24) qui se trouve, exclusivement au niveau d'au moins une entrée et d'au moins une sortie (14), à un niveau inférieur(12), comparativement éloigné du fond du piston et d'ailleurs, à un niveau supérieur constant (16) situé plus près du fond du piston, et qui comporte des dénivellements obliques (18) entre les zones situées sur le bas niveau (12) et le niveau supérieur(16).
EP09765817A 2008-06-20 2009-06-15 Piston pour moteur à combustion interne Not-in-force EP2288800B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09765817T PL2288800T3 (pl) 2008-06-20 2009-06-15 Tłok do silnika spalinowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008002571A DE102008002571A1 (de) 2008-06-20 2008-06-20 Kolben für einen Verbrennungsmotor
PCT/EP2009/057349 WO2009153237A1 (fr) 2008-06-20 2009-06-15 Piston pour moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2288800A1 true EP2288800A1 (fr) 2011-03-02
EP2288800B1 EP2288800B1 (fr) 2012-08-08

Family

ID=41037617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09765817A Not-in-force EP2288800B1 (fr) 2008-06-20 2009-06-15 Piston pour moteur à combustion interne

Country Status (9)

Country Link
US (1) US9382869B2 (fr)
EP (1) EP2288800B1 (fr)
JP (1) JP2011524958A (fr)
CN (2) CN105804882A (fr)
BR (1) BRPI0914149A2 (fr)
DE (1) DE102008002571A1 (fr)
ES (1) ES2392490T3 (fr)
PL (1) PL2288800T3 (fr)
WO (1) WO2009153237A1 (fr)

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* Cited by examiner, † Cited by third party
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DE102011004302A1 (de) 2011-02-17 2012-08-23 Federal-Mogul Nürnberg GmbH Verfahren zur Herstellung eines Kolbens
DE102011076455A1 (de) * 2011-05-25 2012-11-29 Mahle International Gmbh Gießkern zur Bildung eines Kühlkanals in einem Kolben
DE102012217939A1 (de) * 2012-10-01 2014-04-03 Mahle International Gmbh Verfahren zur Herstellung von Kernen für die gießtechnische Herstellung von Werkstücken
JP2014185522A (ja) * 2013-03-21 2014-10-02 Hitachi Automotive Systems Ltd 内燃機関のピストン
DE102013009155A1 (de) * 2013-05-31 2014-12-04 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102015214512A1 (de) 2015-07-30 2017-02-02 Mahle International Gmbh Kolben für einen Verbrennungsmotor
US20180326477A1 (en) * 2015-11-19 2018-11-15 Ks Kolbenschmidt Gmbh Cast Inflow And Outflow Openings For Cast-Steel And Cast Iron Pistons
KR101912764B1 (ko) * 2016-05-02 2018-10-29 동양피스톤 주식회사 내연 기관용 피스톤 및 냉각 채널 코어
KR101934941B1 (ko) * 2016-05-02 2019-01-04 동양피스톤 주식회사 내연 기관용 피스톤 및 냉각 채널 코어
JP7028128B2 (ja) * 2018-10-03 2022-03-02 株式会社豊田自動織機 内燃機関用ピストン
GB2578803B (en) * 2019-04-04 2020-12-16 Cox Powertrain Ltd Marine outboard motor with piston cooling gallery
US11326549B2 (en) * 2020-01-21 2022-05-10 Ford Global Technologies, Llc 218-0266 volcano-shaped inlet of piston oil-cooling gallery

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DE1726073U (de) * 1956-04-10 1956-07-12 Mahle Kommanditgesellschaft Brennkraftmaschinenkolben mit fluessigkeitskuehlung.
US3190273A (en) * 1964-01-03 1965-06-22 Continental Aviat & Eng Corp Piston for internal combustion engine
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JPS60192860A (ja) * 1984-03-14 1985-10-01 Toyota Motor Corp 内燃機関用ピストン
JPH05256193A (ja) * 1992-03-13 1993-10-05 Mitsubishi Heavy Ind Ltd ディーゼル機関のピストン
DE19548811A1 (de) * 1995-12-27 1997-07-03 Mahle Gmbh Tauchkolben mit Kühlkanal
DE19703001C2 (de) * 1997-01-28 1998-12-03 Alcan Gmbh Flüssigkeitsgekühlter Kolben
US5979298A (en) * 1997-05-08 1999-11-09 Zellner Pistons, Llc Cooling gallery for pistons
DE19930630C1 (de) 1999-07-02 2000-10-26 Federal Mogul Nuernberg Gmbh Flüssigkeitsgekühlter Kolben
JP4151223B2 (ja) 2001-01-29 2008-09-17 いすゞ自動車株式会社 ピストンの冷却構造
DE10126493B4 (de) * 2001-05-31 2006-05-11 Ks Kolbenschmidt Gmbh Kolben mit zu den Hauptachsen geneigtem Kühlkanal
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Also Published As

Publication number Publication date
WO2009153237A1 (fr) 2009-12-23
EP2288800B1 (fr) 2012-08-08
US9382869B2 (en) 2016-07-05
US20110180025A1 (en) 2011-07-28
PL2288800T3 (pl) 2012-12-31
CN102046953A (zh) 2011-05-04
CN105804882A (zh) 2016-07-27
BRPI0914149A2 (pt) 2015-10-20
JP2011524958A (ja) 2011-09-08
ES2392490T3 (es) 2012-12-11
DE102008002571A1 (de) 2009-12-31

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