EP2286076B1 - Kolben für einen verbrennungsmotor - Google Patents

Kolben für einen verbrennungsmotor Download PDF

Info

Publication number: EP2286076B1
Authority: EP; European Patent Office
Prior art keywords: piston; connecting walls; counterpressure; pressure side; skirt wall
Prior art date: 2008-06-19
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.): Active

Application number

EP09765668.0A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP2286076A1 (de

Inventor

Martin NÖDL

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Federal Mogul Nuernberg GmbH

Original Assignee

Federal Mogul Nuernberg GmbH

Priority date (The priority date 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 date listed.)

2008-06-19

Filing date

2009-04-22

Publication date

2019-06-26

2009-04-22 Application filed by Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH

2009-04-22 Priority to PL09765668T priority Critical patent/PL2286076T3/pl

2011-02-23 Publication of EP2286076A1 publication Critical patent/EP2286076A1/de

2019-06-26 Application granted granted Critical

2019-06-26 Publication of EP2286076B1 publication Critical patent/EP2286076B1/de

Status Active legal-status Critical Current

2029-04-22 Anticipated expiration legal-status Critical

Links

Images

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 A1 known.
the piston coming out of the DE 198 32 091 A1 is known, has skirt wall portions, which are referred to there as a coat, which are larger on the pressure side, as on the counter-pressure side.
the US 6,345,569 B1 describes a piston with an axially curved piston skirt whose radius is reduced more on the pressure side in the lower region of the shaft than on the counter-pressure side and discloses features which fall under the preamble of claim 1.
the DE 199 18 328 A1 is another state of the art.
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 cylinder liner.
piston coats or piston skirt
piston skirt are substantially portions of the cylindrical surface corresponding to the inner surface of the cylinder liner.
modern pistons are in those areas where 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 sections. 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 are curved 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.
the curvature of the connecting walls on the counterpressure side is predominantly in the same direction as the curvature of the skirt wall section on the counterpressure 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. In the area of the transition of the connecting walls into the pin bosses, viewed from the inside of the piston, an at least slight convex curvature follows.
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 different and respectively designed 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 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 is supported by the wall thickness of the connecting walls on the counter-pressure side at least partially reduced compared to the remaining connecting walls, and / or the wall thickness of the shaft wall portion on the pressure side opposite the remaining shaft wall portion 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.
all connecting walls 18 are formed such that they receive the pin bosses 12 on the inside, that is, the side facing 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)

EP09765668.0A 2008-06-19 2009-04-22 Kolben für einen verbrennungsmotor Active EP2286076B1 (de)

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 EP2286076A1 (de)	2011-02-23
EP2286076B1 true 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 (pl)
EP (1)	EP2286076B1 (pl)
DE (1)	DE102008002536B4 (pl)
ES (1)	ES2739465T3 (pl)
HU (1)	HUE045390T2 (pl)
PL (1)	PL2286076T3 (pl)
WO (1)	WO2009153088A1 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19918328A1 (de) *	1998-04-24	1999-10-28	Unisia Jecs Corp	Kolben für einen Motor mit innerer Verbrennung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
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
US5000078A (en) *	1987-04-18	1991-03-19	Mahle Gmbh	Light metal trunk piston for internal combustion engines
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
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 ES ES09765668T patent/ES2739465T3/es active Active
- 2009-04-22 WO PCT/EP2009/054816 patent/WO2009153088A1/de not_active Ceased
- 2009-04-22 HU HUE09765668A patent/HUE045390T2/hu unknown
- 2009-04-22 EP EP09765668.0A patent/EP2286076B1/de active Active
- 2009-04-22 US US12/999,719 patent/US10024269B2/en active Active
- 2009-04-22 PL PL09765668T patent/PL2286076T3/pl unknown

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19918328A1 (de) *	1998-04-24	1999-10-28	Unisia Jecs Corp	Kolben für einen Motor mit innerer Verbrennung

Also Published As

Publication number	Publication date
DE102008002536A1 (de)	2010-01-07
US10024269B2 (en)	2018-07-17
US20110168124A1 (en)	2011-07-14
EP2286076A1 (de)	2011-02-23
HUE045390T2 (hu)	2019-12-30
DE102008002536B4 (de)	2015-02-12
WO2009153088A1 (de)	2009-12-23
PL2286076T3 (pl)	2019-10-31
ES2739465T3 (es)	2020-01-31

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