EP2288800A1 - Piston for an internal combustion engine - Google Patents
Piston for an internal combustion engineInfo
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 40
- 230000007704 transition Effects 0.000 claims description 3
- 150000003839 salts Chemical group 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 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
- F02F3/16—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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL09765817T PL2288800T3 (en) | 2008-06-20 | 2009-06-15 | Piston for an internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008002571A DE102008002571A1 (en) | 2008-06-20 | 2008-06-20 | Piston for an internal combustion engine |
PCT/EP2009/057349 WO2009153237A1 (en) | 2008-06-20 | 2009-06-15 | Piston for an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2288800A1 true EP2288800A1 (en) | 2011-03-02 |
EP2288800B1 EP2288800B1 (en) | 2012-08-08 |
Family
ID=41037617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09765817A Not-in-force EP2288800B1 (en) | 2008-06-20 | 2009-06-15 | Piston for an internal combustion engine |
Country Status (9)
Country | Link |
---|---|
US (1) | US9382869B2 (en) |
EP (1) | EP2288800B1 (en) |
JP (1) | JP2011524958A (en) |
CN (2) | CN105804882A (en) |
BR (1) | BRPI0914149A2 (en) |
DE (1) | DE102008002571A1 (en) |
ES (1) | ES2392490T3 (en) |
PL (1) | PL2288800T3 (en) |
WO (1) | WO2009153237A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011004302A1 (en) | 2011-02-17 | 2012-08-23 | Federal-Mogul Nürnberg GmbH | Method for producing a piston |
DE102011076455A1 (en) * | 2011-05-25 | 2012-11-29 | Mahle International Gmbh | Casting core for forming a cooling channel in a piston |
DE102012217939A1 (en) * | 2012-10-01 | 2014-04-03 | Mahle International Gmbh | Process for the production of cores for the casting production of workpieces |
JP2014185522A (en) * | 2013-03-21 | 2014-10-02 | Hitachi Automotive Systems Ltd | Piston of internal combustion engine |
DE102013009155A1 (en) * | 2013-05-31 | 2014-12-04 | Mahle International Gmbh | Piston for an internal combustion engine |
DE102015214512A1 (en) | 2015-07-30 | 2017-02-02 | Mahle International Gmbh | Piston for an internal combustion engine |
US20180326477A1 (en) * | 2015-11-19 | 2018-11-15 | Ks Kolbenschmidt Gmbh | Cast Inflow And Outflow Openings For Cast-Steel And Cast Iron Pistons |
KR101912764B1 (en) * | 2016-05-02 | 2018-10-29 | 동양피스톤 주식회사 | Piston for internal combustion engine and cooling channel core |
KR101934941B1 (en) * | 2016-05-02 | 2019-01-04 | 동양피스톤 주식회사 | Piston for internal combustion engine and cooling channel core |
JP7028128B2 (en) * | 2018-10-03 | 2022-03-02 | 株式会社豊田自動織機 | Internal combustion engine piston |
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 |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE822922C (en) * | 1950-03-25 | 1951-11-29 | Kloeckner Humboldt Deutz Ag | Working piston for internal combustion engines |
DE1726073U (en) * | 1956-04-10 | 1956-07-12 | Mahle Kommanditgesellschaft | COMBUSTION MACHINE PISTON WITH LIQUID COOLING. |
US3190273A (en) * | 1964-01-03 | 1965-06-22 | Continental Aviat & Eng Corp | Piston for internal combustion engine |
DD99418A1 (en) | 1972-10-12 | 1973-08-13 | ||
JPS60192860A (en) * | 1984-03-14 | 1985-10-01 | Toyota Motor Corp | Piston for internal-combustion engine |
JPH05256193A (en) * | 1992-03-13 | 1993-10-05 | Mitsubishi Heavy Ind Ltd | Piston for diesel engine |
DE19548811A1 (en) * | 1995-12-27 | 1997-07-03 | Mahle Gmbh | Plunger with cooling channel |
DE19703001C2 (en) * | 1997-01-28 | 1998-12-03 | Alcan Gmbh | Liquid cooled piston |
US5979298A (en) * | 1997-05-08 | 1999-11-09 | Zellner Pistons, Llc | Cooling gallery for pistons |
DE19930630C1 (en) | 1999-07-02 | 2000-10-26 | Federal Mogul Nuernberg Gmbh | Liquid-cooled piston for I.C. engines has an annular cooling channel that runs in an undulating fashion in the direction of the piston axis |
JP4151223B2 (en) | 2001-01-29 | 2008-09-17 | いすゞ自動車株式会社 | Piston cooling structure |
DE10126493B4 (en) * | 2001-05-31 | 2006-05-11 | Ks Kolbenschmidt Gmbh | Piston with inclined to the main axes cooling channel |
DE60203122T2 (en) * | 2001-07-30 | 2005-11-03 | Roberto Oscar Appo | METHOD OF ASSEMBLING A METAL RING THAT IS MOUNTED TO A BEARING BOND AND THUS SOLVED TO FORM THE RING-TYPE COOLING PIPE OF A COMBUSTION ENGINE PISTON, AND METHOD FOR PRODUCING THE RIBBED METAL RING |
DE10221561A1 (en) * | 2002-05-15 | 2004-01-08 | Mahle Gmbh | Cooled piston for an internal combustion engine |
DE10319230A1 (en) * | 2003-04-28 | 2004-11-18 | Ks Kolbenschmidt Gmbh | Piston for internal combustion engine has radially encompassing cooling passage formed in piston crown with rising and falling sections in such way that cooling medium is accelerated from inlet in direction of outlet of passage |
DE10340291A1 (en) * | 2003-09-02 | 2005-04-14 | Mahle Gmbh | Piston for an internal combustion engine |
DE10352244A1 (en) * | 2003-11-08 | 2005-06-09 | Mahle Gmbh | Method for producing a piston for an internal combustion engine |
DE102004043720A1 (en) * | 2004-09-09 | 2006-03-30 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine and internal combustion engine |
JP4276602B2 (en) * | 2004-09-21 | 2009-06-10 | 株式会社豊田自動織機 | Piston for internal combustion engine |
JP4383992B2 (en) | 2004-09-21 | 2009-12-16 | 株式会社豊田自動織機 | Piston for internal combustion engine |
DE102004057558A1 (en) * | 2004-11-30 | 2006-06-01 | Mahle International Gmbh | Piston for internal combustion engine has base component consisting of forged aluminum and ring element of ni-resist, with closed annular cooling passage located between base component and ring element |
DE102005061075A1 (en) * | 2005-12-21 | 2007-06-28 | Mahle International Gmbh | Piston for internal combustion engine has hub cooling channels arranged in bolt hub regions close to bottom of piston and each connected to cooling channel |
DE102005061059A1 (en) * | 2005-12-21 | 2007-06-28 | Mahle International Gmbh | Piston for internal combustion engine has piston head side regions of gudgeon-pin hub reinforced radially inward, and oil outflow borings directed to these regions |
DE102005061074A1 (en) * | 2005-12-21 | 2007-06-28 | Mahle International Gmbh | Piston for combustion engine e.g. diesel engine, has radially outward oriented wall zone of cooling channel formed by ring carrier |
DE102007044105A1 (en) * | 2007-04-27 | 2008-10-30 | Mahle International Gmbh | Casting core for forming a cooling channel in a piston produced by casting |
DE102008020231A1 (en) * | 2008-04-22 | 2009-10-29 | Mahle International Gmbh | Casting core for forming a cooling channel |
DE102008031864A1 (en) * | 2008-07-05 | 2010-01-07 | Mahle International Gmbh | Insert for piston of internal combustion engine i.e. diesel engine, has supporting and cavity base parts that are arranged radially at distance from each other and connected with one another by covers, such that cooling channel is formed |
-
2008
- 2008-06-20 DE DE102008002571A patent/DE102008002571A1/en not_active Withdrawn
-
2009
- 2009-06-15 EP EP09765817A patent/EP2288800B1/en not_active Not-in-force
- 2009-06-15 BR BRPI0914149A patent/BRPI0914149A2/en not_active Application Discontinuation
- 2009-06-15 JP JP2011514009A patent/JP2011524958A/en active Pending
- 2009-06-15 PL PL09765817T patent/PL2288800T3/en unknown
- 2009-06-15 WO PCT/EP2009/057349 patent/WO2009153237A1/en active Application Filing
- 2009-06-15 CN CN201610124828.7A patent/CN105804882A/en active Pending
- 2009-06-15 ES ES09765817T patent/ES2392490T3/en active Active
- 2009-06-15 US US13/000,219 patent/US9382869B2/en active Active
- 2009-06-15 CN CN200980119274XA patent/CN102046953A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2009153237A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009153237A1 (en) | 2009-12-23 |
EP2288800B1 (en) | 2012-08-08 |
US9382869B2 (en) | 2016-07-05 |
US20110180025A1 (en) | 2011-07-28 |
PL2288800T3 (en) | 2012-12-31 |
CN102046953A (en) | 2011-05-04 |
CN105804882A (en) | 2016-07-27 |
BRPI0914149A2 (en) | 2015-10-20 |
JP2011524958A (en) | 2011-09-08 |
ES2392490T3 (en) | 2012-12-11 |
DE102008002571A1 (en) | 2009-12-31 |
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