EP1027535A1 - Kolben mit zentralem kühlraum - Google Patents
Kolben mit zentralem kühlraumInfo
- Publication number
- EP1027535A1 EP1027535A1 EP98951264A EP98951264A EP1027535A1 EP 1027535 A1 EP1027535 A1 EP 1027535A1 EP 98951264 A EP98951264 A EP 98951264A EP 98951264 A EP98951264 A EP 98951264A EP 1027535 A1 EP1027535 A1 EP 1027535A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- pin
- sheet
- cooling chamber
- lower wall
- 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
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
- 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
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
Definitions
- the invention relates to a piston for an internal combustion engine with a piston crown and a central cooling space located below the piston crown.
- a piston is known from JP-GM 60-125338.
- the lower wall of the cooling chamber is formed by a plate attached to the piston under spring preload.
- the sheet is supported by means of molded tabs in the upper area of the inner hubs.
- a disadvantage of this construction is that the sheet has a complicated shape.
- Another disadvantage of the known construction is that, for reasons of strength, it is not possible for all pistons to provide a support surface for a sheet to be supported on the inner hubs.
- the invention is therefore concerned with the problem of a piston with a central cooling space and a lower one To create a wall of the cold room forming sheet metal, in which the disadvantages mentioned do not exist and in particular a simple sheet metal is sufficient as the lower cold room wall.
- the sheet steel made of spring steel is supported and pretensioned by the bolt lying above the pin hub, so that it rests at its ends with a defined contact force on the webs connecting the hubs to one another.
- the bolt supporting the sheet metal can, as shown in FIG. 3, be produced as a hollow body or also consist of solid material. Steel is preferably used as the bolt material.
- the bore receiving the bolt can also be designed as a blind bore on one side.
- the position of the plate relative to the piston can be exactly defined by a bead molded into the plate, with which the plate rests on the pin, compared to plates, the installation position of which is defined by the relatively imprecise internal shape of the piston.
- the volume of the central cooling space can be changed by varying the position of the bolt supporting the sheet in the direction of the longitudinal piston axis and adapting the sheet shape with the inside shape of the piston unchanged.
- the sheet metal has a defined gap or recesses towards the hub supports, which allow the cooling oil to drain off in a controlled manner.
- the position of these drain openings can advantageously be selected so that oil that runs off also lubricates the piston pin bore.
- Fig. 1 shows a piston according to the invention in cross section in the piston pin direction
- Fig. 2 is a bottom view of the piston according to the invention
- Fig. 3 shows a cross section in the pressure-counter pressure direction
- Fig. 4 shows another embodiment with an adapter sleeve instead of a bolt.
- An oil-cooled piston 1 has a piston crown 2 and hubs 4 connected in one piece to it by hub supports 3 and a piston shaft 5.
- An outer cooling channel 6 and a central cooling space 7 are formed in the piston crown 2 and are closed at the bottom by sheets 8 and 9. The cooling oil is supplied via the outer cooling channel 6 and runs through holes in the central cooling space 7 and runs out of the central cooling space through a defined gap between sheet 9 and hub support 3.
- the sheet 9 closing the central cooling space 6 is pressed upwards by a bolt 10, which is pressed into the hub supports 3 above the pin boss, against the webs 11 connecting the hub supports 3.
- the bolt 10 lies in a bead 12 of the plate 9. This ensures an exact positioning of the plate relative to the piston.
- the sheet In the area of its ends, the sheet is adapted to the contour of the webs 11 and their transitions to the hub support by pulling the corners downwards.
- Fig. 4 shows a piston according to the invention, in which the sheet 9 is supported instead of a bolt 10 by means of an adapter sleeve 13. 4 also shows the piston pin 14, which is present in principle in all the exemplary embodiments, and a connecting rod is indicated.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Springs (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19747944 | 1997-10-30 | ||
DE19747944A DE19747944A1 (de) | 1997-10-30 | 1997-10-30 | Kolben mit zentralem Kühlraum |
PCT/DE1998/002595 WO1999023380A1 (de) | 1997-10-30 | 1998-08-29 | Kolben mit zentralem kühlraum |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1027535A1 true EP1027535A1 (de) | 2000-08-16 |
EP1027535B1 EP1027535B1 (de) | 2002-07-17 |
Family
ID=7847098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98951264A Expired - Lifetime EP1027535B1 (de) | 1997-10-30 | 1998-08-29 | Kolben mit zentralem kühlraum |
Country Status (6)
Country | Link |
---|---|
US (1) | US6202619B1 (de) |
EP (1) | EP1027535B1 (de) |
JP (1) | JP4169477B2 (de) |
BR (1) | BR9813312A (de) |
DE (2) | DE19747944A1 (de) |
WO (1) | WO1999023380A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19747944A1 (de) | 1997-10-30 | 1999-05-06 | Mahle Gmbh | Kolben mit zentralem Kühlraum |
DE19926568A1 (de) * | 1999-06-11 | 2000-12-14 | Mahle Gmbh | Gekühlter Kolben für Verbrennungsmotoren |
DE10013395C1 (de) * | 2000-03-17 | 2001-08-02 | Ks Kolbenschmidt Gmbh | Verfahren zur Herstellung eines einteiligen Kühlkanalkolbens, insbesondere für einen Dieselmotor, sowie ein danach hergestellter einteiliger Kühlkanalkolben |
DE10106435A1 (de) * | 2001-02-13 | 2002-08-14 | Bayerische Motoren Werke Ag | Kolben, insbesondere für eine Brennkraftmaschine |
US8276563B2 (en) * | 2002-06-28 | 2012-10-02 | Cummins, Inc. | Internal combustion engine piston |
DE10244511A1 (de) * | 2002-09-25 | 2004-04-15 | Mahle Gmbh | Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor |
ATE413936T1 (de) * | 2003-03-01 | 2008-11-15 | Ks Kolbenschmidt Gmbh | Herstellungsverfahren für einen kühlkanalkolben mit umformbarem bund |
DE10325917A1 (de) | 2003-06-07 | 2005-03-31 | Mahle Gmbh | Kolben für einen Verbrennungsmotor und Gießverfahren zu dessen Herstellung |
DE102004031513A1 (de) * | 2004-06-30 | 2006-01-26 | Ks Kolbenschmidt Gmbh | Verfahren zur Herstellung eines Kühlkanalkolbens für eine Brennkraftmaschine |
US7104183B2 (en) * | 2004-07-07 | 2006-09-12 | Karl Schmidt Unisia, Inc. | One-piece steel piston |
US20060086326A1 (en) * | 2004-10-25 | 2006-04-27 | Ipd, Inc. | One piece cast ferrous crown piston for internal combustion engine |
US10450998B2 (en) * | 2004-10-25 | 2019-10-22 | Industrial Parts Depot, Llc | One piece cast ferrous crown piston for internal combustion engine |
US20070074695A1 (en) * | 2005-10-04 | 2007-04-05 | Mahle Technology, Inc. | Piston having improved cooling characteristics |
DE102008055848A1 (de) * | 2008-11-04 | 2010-05-06 | Ks Kolbenschmidt Gmbh | Kühlkanalkolben einer Brennkraftmaschine mit einem Verschlusselement, das den Kühlkanal verschließt |
DE102011013139A1 (de) * | 2011-03-04 | 2012-09-06 | Mahle International Gmbh | Kolben für einen Verbrennungsmotor |
DE102016225632A1 (de) * | 2016-12-20 | 2018-06-21 | Mahle International Gmbh | Kolben einer Brennkraftmaschine |
DE102016225635A1 (de) * | 2016-12-20 | 2018-06-21 | Mahle International Gmbh | Kolben einer Brennkraftmaschine |
CN114645798B (zh) * | 2022-03-14 | 2023-02-28 | 北京理工大学 | 一种活塞销孔衬套结构 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3221718A (en) * | 1964-01-09 | 1965-12-07 | Continental Aviat & Eng Corp | Piston construction |
DE1301677B (de) | 1967-08-16 | 1969-08-21 | Mahle Kg | Triebwerk, insbesondere fuer Brennkraftmaschinen |
US4506632A (en) * | 1983-07-28 | 1985-03-26 | Toyota Jidosha Kabushiki Kaisha | Piston assembly with cooling lubricant reservoir defining member engaged to piston pin mounting bosses |
JPS6030455A (ja) | 1983-07-29 | 1985-02-16 | Toyota Motor Corp | 内燃機関のピストン |
JPS60125338A (ja) | 1983-12-12 | 1985-07-04 | Hitachi Metals Ltd | 永久磁石合金の製造方法 |
JPS60125338U (ja) * | 1984-02-01 | 1985-08-23 | トヨタ自動車株式会社 | 内燃機関用ピストン |
DE3708376A1 (de) * | 1986-03-20 | 1987-09-24 | Mahle Gmbh | Mehrteiliger tauchkolben fuer verbrennungsmotoren |
DE3643039A1 (de) * | 1986-12-17 | 1988-06-30 | Mahle Gmbh | Kuehlbarer tauchkolben fuer verbrennungsmotoren |
DE3717767A1 (de) * | 1987-05-26 | 1988-12-08 | Mahle Gmbh | Kuehlbarer tauchkolben fuer verbrennungsmotoren |
DE3735590C1 (en) * | 1987-10-21 | 1989-01-05 | Mahle Gmbh | Closing of holes in cast pistons resulting from the manufacturing process |
US4867119A (en) * | 1988-10-21 | 1989-09-19 | Caterpillar Inc. | Engine piston assembly and forged piston member therefor having a cooling recess |
BR9005376A (pt) * | 1990-10-18 | 1992-06-16 | Metal Leve Sa | Embolo bipartido com fechamento postico de galeria e processo para sua obtencao |
JP3224389B2 (ja) * | 1990-12-13 | 2001-10-29 | マーレ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 内燃機関用の多部分から構成された冷却式ピストン |
DE4039754A1 (de) | 1990-12-13 | 1992-06-17 | Mahle Gmbh | Mehrteiliger, gekuehlter kolben fuer verbrennungsmotoren |
DE4446726A1 (de) * | 1994-12-24 | 1996-06-27 | Mahle Gmbh | Verfahren zur Herstellung eines einteiligen Kühlkanalkolbens |
US5653204A (en) * | 1996-05-21 | 1997-08-05 | Caterpillar Inc. | Piston assembly retaining device |
DE19747944A1 (de) | 1997-10-30 | 1999-05-06 | Mahle Gmbh | Kolben mit zentralem Kühlraum |
US5934174A (en) * | 1998-10-02 | 1999-08-10 | Cummins Engine Company, Inc. | Lightweight articulated piston head and method of making the piston head |
DE19846152A1 (de) * | 1998-10-07 | 2000-04-13 | Mahle Gmbh | Kolben mit Kolbengrundkörper aus geschmiedetem Stahl und einem Kühlkanal |
-
1997
- 1997-10-30 DE DE19747944A patent/DE19747944A1/de not_active Withdrawn
-
1998
- 1998-08-29 JP JP2000519213A patent/JP4169477B2/ja not_active Expired - Fee Related
- 1998-08-29 DE DE59804835T patent/DE59804835D1/de not_active Expired - Lifetime
- 1998-08-29 EP EP98951264A patent/EP1027535B1/de not_active Expired - Lifetime
- 1998-08-29 WO PCT/DE1998/002595 patent/WO1999023380A1/de active IP Right Grant
- 1998-08-29 BR BR9813312-8A patent/BR9813312A/pt not_active IP Right Cessation
- 1998-08-29 US US09/530,076 patent/US6202619B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9923380A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP4169477B2 (ja) | 2008-10-22 |
DE19747944A1 (de) | 1999-05-06 |
BR9813312A (pt) | 2000-08-22 |
EP1027535B1 (de) | 2002-07-17 |
US6202619B1 (en) | 2001-03-20 |
WO1999023380A1 (de) | 1999-05-14 |
DE59804835D1 (de) | 2002-08-22 |
JP2001522018A (ja) | 2001-11-13 |
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