EP1984613A1 - Multiple-part steel piston for an internal combustion engine having a cooling duct - Google Patents
Multiple-part steel piston for an internal combustion engine having a cooling ductInfo
- Publication number
- EP1984613A1 EP1984613A1 EP07703220A EP07703220A EP1984613A1 EP 1984613 A1 EP1984613 A1 EP 1984613A1 EP 07703220 A EP07703220 A EP 07703220A EP 07703220 A EP07703220 A EP 07703220A EP 1984613 A1 EP1984613 A1 EP 1984613A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- ring element
- ring
- web
- designed
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 title claims description 13
- 229910000831 Steel Inorganic materials 0.000 title claims description 6
- 239000010959 steel Substances 0.000 title claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005304 joining Methods 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
-
- 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
Definitions
- the invention relates to a piston for an internal combustion engine with a cooling channel according to the features of the preamble of claim 1.
- Pistons with a cooling channel for internal combustion engines are known in principle.
- cooling channel piston said piston is provided behind the ring field coaxially and radially circumferentially, a cooling passage, circulated by the engine oil for cooling the upper portion of the piston.
- DE 103 25 914 A1 or DE 100 47 258 C2 has already become known to attach a ring element to a piston body.
- the contact areas of the ring element are designed at least once paragraph-shaped to the piston body and the ring element is permanently attached to the piston body.
- the paragraph-shaped design of the contact areas has the advantage that the ring element is guided both during placement and after attachment to the piston body and is guided guided, so that tilting can be avoided.
- the heel-shaped abutment areas also increase the strength of the piston crown and the upper piston part, after the ring element has been permanently attached to the piston body. Through this both form-fitting and material-locking connection easier assembly and increased strength is given.
- Another advantage of the invention lies in the fact that the wall thicknesses of the components involved, in particular of the ring member and the piston body (in particular the wall thickness in the transition region from the cooling channel to a combustion bowl) over the prior art can be reduced because of the placement of the ring element on the piston body only small forces are required, which are significantly lower than those forces that would be required, as if the ring member to be bolted to the piston body.
- by appropriate shaping of both the Kobengrund stresses and the ring element can be realized in advance the desired and sufficiently large cross-section of the cooling channel.
- a piston 1 which consists of a piston upper part 2 and a piston lower part 3.
- the finished piston 1 may be in one piece or consist of the initially separate parts 2, 3, which are joined together.
- the invention is also applied to a piston head of a pendulum piston.
- piston upper part 2 a ring field with a plurality of annular grooves 4 and a radially surrounding cooling channel 5 arranged behind it is provided in a manner known per se. Not necessarily also a combustion chamber trough 6 is arranged behind the cooling channel 5. Depending on the design of the piston 1, such a combustion bowl 6 is present or not. In addition or as an alternative to a combustion bowl 6, one or more valve pockets may also be present.
- the piston lower part 3 has, in a manner also known per se, at least one piston shaft 7, in particular a cylinder-shaped piston skirt, and a pin bore 8 for receiving a piston pin.
- the lower web 11 on which the lower peripheral edge of the ring element 9 rests, designed paragraph-shaped.
- the lower web 11 protrudes almost horizontally from the piston main body, on the one hand to pretend the position of the ring member 9 on the piston body and on the other hand the height to reduce the piston, since in this embodiment, the piston skirt and the piston hub can go out almost perpendicular and at right angles from the lower web 11.
- a piston which can be used for the operation of high-speed, high-pressure diesel engines with outputs greater than 80 kW per liter and ignition pressures above 200 bar.
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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07703220T PL1984613T3 (en) | 2006-02-17 | 2007-02-02 | Multiple-part steel piston for an internal combustion engine having a cooling duct |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006007806 | 2006-02-17 | ||
PCT/EP2007/000891 WO2007093289A1 (en) | 2006-02-17 | 2007-02-02 | Multiple-part steel piston for an internal combustion engine having a cooling duct |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1984613A1 true EP1984613A1 (en) | 2008-10-29 |
EP1984613B1 EP1984613B1 (en) | 2017-11-01 |
Family
ID=37969849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07703220.9A Active EP1984613B1 (en) | 2006-02-17 | 2007-02-02 | Multiple-part steel piston for an internal combustion engine having a cooling duct |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1984613B1 (en) |
DE (1) | DE102007005268A1 (en) |
PL (1) | PL1984613T3 (en) |
WO (1) | WO2007093289A1 (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007044106A1 (en) * | 2007-09-15 | 2009-03-19 | Mahle International Gmbh | Two-piece piston for an internal combustion engine |
DE102008038325A1 (en) | 2007-12-20 | 2009-06-25 | Mahle International Gmbh | Method for attaching a ring element on a piston for an internal combustion engine |
DE102009025691A1 (en) | 2009-06-20 | 2010-01-28 | Daimler Ag | Piston for internal combustion engine, particularly reciprocating internal combustion engine, has upper piston area, which has ring carrier with ring groove and piston bowl |
DE102009041392A1 (en) | 2009-09-12 | 2011-05-26 | Daimler Ag | Piston for internal combustion engine, particularly reciprocating piston engine, has upper piston area, which has ring carrier with ring groove and piston bowl |
US9970384B2 (en) | 2009-11-06 | 2018-05-15 | Federal-Mogul Llc | Steel piston with cooling gallery and method of construction thereof |
US8807109B2 (en) | 2009-11-06 | 2014-08-19 | Federal-Mogul Corporation | Steel piston with cooling gallery and method of construction thereof |
DE102010051033A1 (en) | 2010-11-11 | 2012-05-16 | Daimler Ag | Liquid-cooled piston of an internal combustion engine |
DE102010051681B4 (en) | 2010-11-17 | 2019-09-12 | Daimler Ag | Method for producing a cooling channel piston |
DE102010056218A1 (en) * | 2010-12-24 | 2012-06-28 | Mahle International Gmbh | Piston for an internal combustion engine |
DE102011013143A1 (en) | 2011-03-04 | 2012-09-06 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
DE102011107656A1 (en) * | 2011-07-12 | 2013-01-17 | Mahle International Gmbh | Method for producing a piston for an internal combustion engine and pistons for an internal combustion engine |
US9593641B2 (en) * | 2011-09-21 | 2017-03-14 | Mahle International Gmbh | Laser welded piston assembly |
US20160061326A1 (en) | 2012-08-23 | 2016-03-03 | Ks Kolbenschmidt Gmbh | Joined connection on a two-piece steel piston and joining method |
DE102012215300A1 (en) * | 2012-08-29 | 2014-03-06 | Federal-Mogul Nürnberg GmbH | Steel/aluminum piston, used in motor, includes cooling channel and piston parts connected to along triangular weld seam produced by welding process, where seam is directed to cooling channel and cavity is formed by melting welding bead |
DE102012220778A1 (en) * | 2012-11-14 | 2014-05-15 | Mahle International Gmbh | Laser welding method for welding two elements e.g. plug and camshaft tube of motor component e.g. camshaft used in internal combustion engine, involves welding two elements of motor component with each other at adjustable welding depth |
US9440310B2 (en) | 2013-01-15 | 2016-09-13 | Mahle International Gmbh | Monolite piston laser welding spatter control |
CN105246639B (en) * | 2013-02-22 | 2017-07-07 | 马勒国际有限公司 | There is the piston component of Weld-supporting |
US11162453B2 (en) | 2016-05-04 | 2021-11-02 | Ks Kolbenschmidt Gmbh | Piston |
KR101874560B1 (en) * | 2016-12-08 | 2018-07-04 | 동양피스톤 주식회사 | Piston for vehicle engine and method for manufacturing the same |
US10926362B2 (en) * | 2018-12-13 | 2021-02-23 | Caterpillar Inc. | Remanufactured engine piston and method |
DE102022102051A1 (en) | 2022-01-28 | 2023-08-03 | Ks Kolbenschmidt Gmbh | Piston blank, piston and method |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3613521A (en) * | 1968-11-07 | 1971-10-19 | Komatsu Mfg Co Ltd | Piston for internal combustion engine |
BR8803970A (en) * | 1988-07-15 | 1990-03-20 | Metal Leve Sa | REFRIGERATED ARTICULATED PUMP |
IT1240526B (en) * | 1990-07-31 | 1993-12-17 | Borgo Nova S.P.A. | IMPROVEMENT RELATING TO PISTONS, IN GENERAL. |
DE19846152A1 (en) * | 1998-10-07 | 2000-04-13 | Mahle Gmbh | Piston with piston base made of forged steel and a cooling channel |
DE10128737B4 (en) * | 2001-06-13 | 2005-08-18 | Federal-Mogul Nürnberg GmbH | Piston with dispersion-hardened piston upper part |
US7104183B2 (en) * | 2004-07-07 | 2006-09-12 | Karl Schmidt Unisia, Inc. | One-piece steel piston |
-
2007
- 2007-02-02 EP EP07703220.9A patent/EP1984613B1/en active Active
- 2007-02-02 DE DE102007005268A patent/DE102007005268A1/en not_active Ceased
- 2007-02-02 PL PL07703220T patent/PL1984613T3/en unknown
- 2007-02-02 WO PCT/EP2007/000891 patent/WO2007093289A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007093289A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102007005268A1 (en) | 2007-08-30 |
EP1984613B1 (en) | 2017-11-01 |
WO2007093289A1 (en) | 2007-08-23 |
PL1984613T3 (en) | 2018-04-30 |
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