EP2286076A1 - Kolben für einen verbrennungsmotor - Google Patents
Kolben für einen verbrennungsmotorInfo
- Publication number
- EP2286076A1 EP2286076A1 EP09765668A EP09765668A EP2286076A1 EP 2286076 A1 EP2286076 A1 EP 2286076A1 EP 09765668 A EP09765668 A EP 09765668A EP 09765668 A EP09765668 A EP 09765668A EP 2286076 A1 EP2286076 A1 EP 2286076A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure side
- piston
- connecting walls
- counter
- shaft 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
- F02F3/02—Pistons having means for accommodating or controlling heat expansion
- F02F3/022—Pistons having means for accommodating or controlling heat expansion the pistons having an oval circumference or non-cylindrical shaped skirts, e.g. oval
Definitions
- the invention relates to a piston for an internal combustion engine according to the preamble of claim 1.
- a piston according to the preamble of claim 1 is known from DE 10 2007 020 447 Al.
- the piston which is known from DE 198 32 091 Al, has skirt wall sections, which are designated there as a jacket, which are larger on the pressure side, than on the counter-pressure side.
- the invention has for its object to provide a piston for an internal combustion engine having an improved combination of load capacity, especially in the recent trends in the field of engine development, and the piston noise.
- the shaft wall sections can also be referred to as piston coats or piston skirt and are substantially portions of the cylindrical surface corresponding to the inner surface of the ZyI indersburgbuchse.
- piston coats or piston skirt are substantially portions of the cylindrical surface corresponding to the inner surface of the ZyI indersburgbuchse.
- modern pistons are in those areas in which a lateral support is not essential, that is set back in the region of the pin bosses, so that remain in the areas required for the support on both sides of the piston pin, the described shaft wall portions. These may have a shape that changes in the direction of the axis of rotation of the piston.
- the described shaft wall sections are connected by connecting walls, which arise essentially by the resetting of the piston skirt in the area of the pin bosses, and which receive pin bosses.
- the piston according to the invention is characterized in that the connecting walls crumbled on the counter-pressure side, and are largely straight on the pressure side. As a result, the counter-pressure side is more elastic than the pressure side.
- the design on the counter-pressure side can be referred to as a " Figure of 8" design and is relatively elastic due to the curvature of the connecting walls. This design has a favorable effect on the noise, since the piston comparatively "soft” strikes on the counter-pressure side. This reduces noise and at the same time is acceptable in terms of component load since it is lower on the back pressure side than on the pressure side.
- both the skirt wall portion and the connecting walls on the back pressure side, as seen from the inside of the piston are concavely curved.
- an at least slight convex curvature can follow.
- the in itself contradictory demands for the absorption of high lateral forces on the one hand and the reduced noise on the other hand combined in an advantageous manner by the different sides of the piston are designed differently and respectively according to the local requirements.
- the piston thereby also the increased requirements due to increasing ignition pressures and / or the described shift of the occurrence of the maximum lateral force load is justified.
- the skirt wall section on the counterpressure side is presently preferred to form the skirt wall section on the counterpressure side at least partially wider than the skirt wall section on the pressure side.
- the described rigid formation on the pressure side and the more elastic formation on the counter-pressure side can be assisted in that the wall thickness of the
- Shaft wall portion and / or the connecting walls on the counter-pressure side at least partially reduced with respect to the remaining shaft wall section and / or the remaining connecting walls, and / or the wall thickness of theSchmtwandabSchnitt and / or the connecting walls on the pressure side opposite the remaining shaft wall portion and / or the remaining connecting walls at least partially is enlarged.
- a further increase in the elasticity and / or on the pressure side an increase in rigidity can be achieved, which advantageously supports the desired effect according to the invention.
- the figure shows a cross section through the piston according to the invention in the area of the pin bosses.
- FIG. 1 shows a cross section, that is to say a section perpendicular to the axis of rotation of the piston 10 according to the invention. It can be seen the pin bosses 12 and the shaft wall sections 14 and 16, with which the piston is supported in the cylinder liner.
- 14 denotes the skirt wall portion on the back pressure side
- 16 the skirt wall portion on the pressure side.
- the shaft wall portion 16 on the pressure side in the width that is measured substantially in the direction of the piston pin axis A, slightly narrower than the shaft wall portion 14 on the back pressure side.
- the connecting walls 18 and 20 of the two sides differ.
- the connecting walls 20 are largely straight in order to support the shaft wall section 16 on the pressure side as rigidly as possible, so that the loads can be absorbed.
- the connecting walls 18 are curved on the counter-pressure side, so that here a more elastic design is formed, which is advantageous for the piston noises.
- the connecting walls 18 are on the counter-pressure side, starting from the pin bosses 12 initially over a short distance, viewed from the inside 22 of the piston, convexly curved and then go harmoniously into a concave curvature, to which the concave curvature of the shaft wall portion 14 connects on the back pressure side.
- connecting walls 18 are formed such that they receive the pin bosses 12 on the inside, that is, the directed to the piston interior 22 side. Further, in the illustrated embodiment, the skirt wall portion 16 on the pressure side on the outside extends slightly beyond the connecting walls 20 to provide sufficient area for the support of the piston 10.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL09765668T PL2286076T3 (pl) | 2008-06-19 | 2009-04-22 | Tłok silnika spalinowego |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008002536.4A DE102008002536B4 (de) | 2008-06-19 | 2008-06-19 | Kolben für einen Verbrennungsmotor |
| PCT/EP2009/054816 WO2009153088A1 (de) | 2008-06-19 | 2009-04-22 | Kolben für einen verbrennungsmotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2286076A1 true EP2286076A1 (de) | 2011-02-23 |
| EP2286076B1 EP2286076B1 (de) | 2019-06-26 |
Family
ID=40908577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09765668.0A Active EP2286076B1 (de) | 2008-06-19 | 2009-04-22 | Kolben für einen verbrennungsmotor |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US10024269B2 (de) |
| EP (1) | EP2286076B1 (de) |
| DE (1) | DE102008002536B4 (de) |
| ES (1) | ES2739465T3 (de) |
| HU (1) | HUE045390T2 (de) |
| PL (1) | PL2286076T3 (de) |
| WO (1) | WO2009153088A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011002653A1 (de) | 2011-01-13 | 2012-07-19 | Federal-Mogul Nürnberg GmbH | Kolben zum Einsatz in Verbrennungsmotoren |
| BR102012032765A2 (pt) | 2012-12-20 | 2014-09-30 | Mahle Int Gmbh | Pistão de motor de combustão interna |
| DE102015217911A1 (de) * | 2015-09-18 | 2017-03-23 | Mahle International Gmbh | Kolben für eine Brennkraftmaschine |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2149862A (en) * | 1936-07-20 | 1939-03-07 | Adolph L Nelson | Piston |
| IT1182507B (it) * | 1985-07-12 | 1987-10-05 | Ae Borgo Spa | Pistoni con profilo asimmetrico per motori a combustione interna |
| DE3713242C1 (de) * | 1987-04-18 | 1988-10-20 | Mahle Gmbh | Leichtmetall-Tauchkolben fuer Verbrennungsmotoren |
| DE4109160C3 (de) * | 1991-03-20 | 2000-11-30 | Federal Mogul Nuernberg Gmbh | Kolben für Brennkraftmaschinen |
| JPH1136978A (ja) | 1997-07-16 | 1999-02-09 | Unisia Jecs Corp | 内燃機関用ピストン |
| JPH11303674A (ja) * | 1998-04-24 | 1999-11-02 | Unisia Jecs Corp | 内燃機関のピストン |
| JP2000282951A (ja) * | 1999-01-29 | 2000-10-10 | Honda Motor Co Ltd | 内燃機関用ピストン |
| DE19908670C2 (de) | 1999-02-27 | 2001-02-22 | Federal Mogul Burscheid Gmbh | Kolben für Brennkraftmaschinen |
| GB2367602B (en) * | 2000-10-07 | 2004-10-27 | Federal Mogul Bradford Ltd | Piston for internal combustion engine |
| US7302884B2 (en) * | 2005-11-03 | 2007-12-04 | Dresser, Inc. | Piston |
| DE102007020447A1 (de) * | 2007-04-27 | 2008-10-30 | Mahle International Gmbh | Kolben für einen Verbrennungsmotor |
-
2008
- 2008-06-19 DE DE102008002536.4A patent/DE102008002536B4/de not_active Expired - Fee Related
-
2009
- 2009-04-22 HU HUE09765668A patent/HUE045390T2/hu unknown
- 2009-04-22 US US12/999,719 patent/US10024269B2/en active Active
- 2009-04-22 PL PL09765668T patent/PL2286076T3/pl unknown
- 2009-04-22 EP EP09765668.0A patent/EP2286076B1/de active Active
- 2009-04-22 WO PCT/EP2009/054816 patent/WO2009153088A1/de not_active Ceased
- 2009-04-22 ES ES09765668T patent/ES2739465T3/es active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009153088A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110168124A1 (en) | 2011-07-14 |
| HUE045390T2 (hu) | 2019-12-30 |
| PL2286076T3 (pl) | 2019-10-31 |
| DE102008002536A1 (de) | 2010-01-07 |
| ES2739465T3 (es) | 2020-01-31 |
| DE102008002536B4 (de) | 2015-02-12 |
| US10024269B2 (en) | 2018-07-17 |
| EP2286076B1 (de) | 2019-06-26 |
| WO2009153088A1 (de) | 2009-12-23 |
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