EP2893177A1 - Piston for an internal combustion engine - Google Patents
Piston for an internal combustion engineInfo
- Publication number
- EP2893177A1 EP2893177A1 EP13765618.7A EP13765618A EP2893177A1 EP 2893177 A1 EP2893177 A1 EP 2893177A1 EP 13765618 A EP13765618 A EP 13765618A EP 2893177 A1 EP2893177 A1 EP 2893177A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- base plate
- closure element
- collar
- piston according
- 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
- F02F3/225—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid the liquid being directed into blind holes
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P1/00—Air cooling
- F01P1/04—Arrangements for cooling pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
-
- 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
- F02F2003/0053—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by soldering
-
- 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
- F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding
-
- 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
Definitions
- the present invention relates to a piston for an internal combustion engine, which has a piston skirt and a piston head with a circumferential annular portion and with a sealed with a closure element circumferential cooling channel, wherein between the piston head and the piston skirt, a circumferential recess is formed.
- a generic piston is known, for example, from DE 44 46 726 A1 and is also referred to as a "piston with a thermally decoupled piston shaft.” Such pistons are characterized by high strength and high heat resistance due to the thermal decoupling of the piston head and piston shaft.
- the object of the present invention is to develop a generic piston so that the cooling channel is closed in a particularly simple manner.
- the solution consists in that the closure element consists of at least two sub-elements, that each sub-element has a radially oriented base plate and at least one circumferential collar axially aligned at the outer edge of the base plate, which is received in at least one outer fold extending below the ring portion.
- the idea according to the invention consists of accurately fitting a closure element consisting of at least two partial elements into the outer fold arranged below the annular section.
- the at least two sub-elements are structurally very simple and easy to manufacture. The need to set up a spring preload is eliminated.
- the at least two sub-elements are fastened in the usual way on the piston. Since no disturbing voltages occur, the closure element designed according to the invention is securely and permanently held on the piston.
- the at least one collar and / or the at least one base plate is expediently attached to the piston by welding, gluing or soldering.
- the at least one collar is arranged flush with the outer contour of the piston head to ensure the fit accuracy in the cylinder in the mounted state.
- Each sub-element expediently has exactly one continuous collar.
- the sub-elements can also have two or more spaced-apart collars.
- At least one oil inlet and / or oil outlet opening is provided in at least one base plate in order to ensure the cooling oil circulation in the cooling channel.
- This at least one oil inlet and / or oil outlet opening is preferably formed in the end regions of two adjacent sub-elements. The necessary recesses in the end regions can be formed directly during the manufacturing process of the sub-elements.
- the free edge of the at least one base plate is preferably arranged at a distance from the piston.
- the free space between base plate and piston can then serve as an additional cooling outlet.
- the closure element is expediently designed as a sheet metal component. It can also be designed as a spring plate. In this case, if desired, the free edge of at least one base plate may be biased against the piston.
- Figure 1 shows an embodiment of a piston according to the invention in section, wherein the right half opposite the left half is shown rotated by 90 °;
- Figure 2 is an enlarged perspective view of an embodiment of a closure element.
- FIG. 1 shows an exemplary embodiment of a piston 10 according to the invention.
- the piston 10 has a piston main body 11 and a piston ring element 12. Both components can be made of any metallic material that is suitable for joining the components.
- the piston main body 11 and the piston ring element 12 together form the piston head 13 and the piston shaft 14 of the piston 10.
- the piston base body 11 has the piston shaft 14, which is provided in known manner with hubs 15 and hub bores 16 for receiving a piston pin (not shown) and with running surfaces 17.
- the piston main body 11 further forms an inner part 17a of a piston head 17 and a combustion recess 18th
- the piston ring member 12 forms an outer portion 17b of the piston crown 17 and further includes a circumferential land land 19 and a circumferential ring portion 21 for receiving piston rings (not shown).
- the hubs 15 of the piston main body 11 are attached via hub connections 22 on the underside of the piston head 13.
- the piston skirt 14 is separated from the ring section 21 by a circumferential annular recess 23. Thus, the piston skirt 14 is thermally decoupled from the piston head 13.
- the piston base body 11 and the piston ring element 12 are joined together by joining, in the exemplary embodiment preferably by means of laser welding.
- a joining seam 26 is formed in the region of the piston head 17, which in this embodiment runs parallel to the central axis M of the piston 10.
- the piston base body 11 and the piston ring element 12 together form a circumferential cooling channel 24, which is arranged between the combustion bowl 18 and the ring section 21 and is closed by a closure element 25.
- the closure element 26 is designed in the embodiment as a sheet metal component and consists of two sub-elements 27, 28. Each sub-element has a radially oriented base plate 29 with a free edge 29a and exactly one axially aligned circumferential collar 31 which is disposed on the outer edge of the respective base plate 29. Recesses are provided in the end regions 27a, 27b, 28a, 28b of the subelements 27, 28, which together form an oil inlet or oil outlet opening 32, 33.
- each circumferential collar 31 is received in an outer fold 34 which is formed in the piston ring member 11 below the ring portion 21.
- Each collar 31 is formed flush with the outer contour of the piston ring member 11.
- Each sub-element 27, 28 is secured in the region of its base plate 29 and / or in the region of its collar 31 by means of welding to the piston ring element 11.
- the free edge 29 a of each base plate 29 is spaced from the piston 10.
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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012014195.5A DE102012014195A1 (en) | 2012-07-18 | 2012-07-18 | Piston for an internal combustion engine |
PCT/DE2013/000402 WO2015007256A1 (en) | 2012-07-18 | 2013-07-18 | Piston for an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2893177A1 true EP2893177A1 (en) | 2015-07-15 |
EP2893177B1 EP2893177B1 (en) | 2016-12-28 |
Family
ID=49225980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13765618.7A Not-in-force EP2893177B1 (en) | 2012-07-18 | 2013-07-18 | Piston for an internal combustion engine |
Country Status (7)
Country | Link |
---|---|
US (1) | US9784211B2 (en) |
EP (1) | EP2893177B1 (en) |
JP (1) | JP6195928B2 (en) |
CN (1) | CN104520567A (en) |
BR (1) | BR112015001068A2 (en) |
DE (1) | DE102012014195A1 (en) |
WO (1) | WO2015007256A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011088123A1 (en) | 2011-12-09 | 2013-06-13 | Henkel Ag & Co. Kgaa | Method for integrally bonding plastic pipes |
CN109595092A (en) * | 2018-12-27 | 2019-04-09 | 滨州东海龙活塞有限公司 | A kind of method for supporting of piston and piston ring groove |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4377967A (en) * | 1981-03-27 | 1983-03-29 | Mack Trucks, Inc. | Two-piece piston assembly |
DE3643039A1 (en) | 1986-12-17 | 1988-06-30 | Mahle Gmbh | COOLABLE SUBMERSIBLE PISTON FOR COMBUSTION ENGINES |
BR8803970A (en) | 1988-07-15 | 1990-03-20 | Metal Leve Sa | REFRIGERATED ARTICULATED PUMP |
US4986167A (en) * | 1989-05-25 | 1991-01-22 | Caterpillar Inc. | Articulated piston with a cooling recess having a preestablished volume therein |
DE3991677T1 (en) * | 1989-05-25 | 1991-06-06 | Caterpillar Inc | FLEXIBLE PISTON WITH A COOLING RECESSION HAVING A SPECIFIC VOLUME |
BR9005376A (en) | 1990-10-18 | 1992-06-16 | Metal Leve Sa | BIPARTITE EMBULE WITH POSTIC GALLERY CLOSING AND PROCESS FOR YOUR OBTAINING |
JP3224389B2 (en) | 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 | Multi-part cooled piston for internal combustion engines |
DE4124634A1 (en) | 1991-07-25 | 1993-01-28 | Mahle Gmbh | Multipart cooled piston for IC engine - has cooling oil chamber wall, clamped between collars, one flanged through less then 90 degrees |
DE4430137B4 (en) | 1994-08-25 | 2004-07-22 | Mahle Gmbh | Multi-part, cooled piston for internal combustion engines |
DE4446726A1 (en) | 1994-12-24 | 1996-06-27 | Mahle Gmbh | Process for producing a one-piece cooling channel piston |
DE19926567A1 (en) | 1999-06-11 | 2000-12-14 | Mahle Gmbh | Cooled pistons for internal combustion engines |
US6401595B1 (en) * | 2000-10-18 | 2002-06-11 | Caterpillar Inc. | Piston for an internal combustion engine and method of assembly |
DE10110889C1 (en) * | 2001-03-07 | 2002-10-02 | Ks Kolbenschmidt Gmbh | Method for producing a cooling channel piston, and a cooling channel piston produced by the method |
DE10132447A1 (en) * | 2001-07-04 | 2003-01-09 | Ks Kolbenschmidt Gmbh | Piston with cooling duct in crown has cooling duct open to the bottom and covered with a welded ring |
DE10132446A1 (en) * | 2001-07-04 | 2003-01-30 | Ks Kolbenschmidt Gmbh | Piston for IC engine has forged upper section with integral rings and cooling channels which open downwards which is welded to forged piston body |
DE10301367A1 (en) | 2003-01-16 | 2004-07-29 | Mahle Gmbh | Method for making shaker bores in the cooling channel of a one-piece piston |
DE10326456A1 (en) * | 2003-06-12 | 2004-12-30 | Mahle Gmbh | Pistons for an internal combustion engine |
DE102004019010A1 (en) | 2004-04-20 | 2005-11-17 | Mahle Gmbh | Two-part spring disk for automotive piston exerts different forces around the circumference |
DE102004019011A1 (en) | 2004-04-20 | 2005-11-17 | Mahle Gmbh | Cooling duct cover for a piston of an internal combustion engine |
DE102005037175A1 (en) | 2005-08-06 | 2007-02-08 | Mahle International Gmbh | Piston for an internal combustion engine and cover ring for the cooling channel of such a piston |
DE102006045728A1 (en) | 2006-09-27 | 2008-04-03 | Mahle International Gmbh | Single-piece piston for internal combustion engine, has semicircular unit with lower region lying region of shaft unit on shoulder of shaft unit and at region of front side of bolt bosses respectively on projection of boss connection |
DE102008055908A1 (en) * | 2008-11-05 | 2010-05-06 | Mahle International Gmbh | Multi-part piston for an internal combustion engine |
-
2012
- 2012-07-18 DE DE102012014195.5A patent/DE102012014195A1/en not_active Withdrawn
-
2013
- 2013-07-18 CN CN201380038374.6A patent/CN104520567A/en active Pending
- 2013-07-18 WO PCT/DE2013/000402 patent/WO2015007256A1/en active Application Filing
- 2013-07-18 EP EP13765618.7A patent/EP2893177B1/en not_active Not-in-force
- 2013-07-18 US US14/415,251 patent/US9784211B2/en not_active Expired - Fee Related
- 2013-07-18 BR BR112015001068A patent/BR112015001068A2/en not_active IP Right Cessation
- 2013-07-18 JP JP2015530291A patent/JP6195928B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2015007256A1 * |
Also Published As
Publication number | Publication date |
---|---|
BR112015001068A2 (en) | 2017-06-27 |
WO2015007256A1 (en) | 2015-01-22 |
DE102012014195A1 (en) | 2014-01-23 |
WO2015007256A8 (en) | 2015-02-12 |
US20150322887A1 (en) | 2015-11-12 |
JP6195928B2 (en) | 2017-09-13 |
US9784211B2 (en) | 2017-10-10 |
EP2893177B1 (en) | 2016-12-28 |
JP2016515175A (en) | 2016-05-26 |
CN104520567A (en) | 2015-04-15 |
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