EP2329125B1 - Kolben für einen verbrennungsmotor - Google Patents

Kolben für einen verbrennungsmotor Download PDF

Info

Publication number: EP2329125B1
Authority: EP; European Patent Office
Prior art keywords: piston; walls; skirt; thrust face; box walls
Prior art date: 2008-08-13
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

EP09736093.7A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP2329125A2 (de

Inventor

Thomas Hettich

Michael Marquardt

Peter Kleinle

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.)

Mahle International GmbH

Original Assignee

Mahle International 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.)

2008-08-13

Filing date

2009-08-12

Publication date

2018-02-21

2009-08-12 Application filed by Mahle International GmbH filed Critical Mahle International GmbH

2011-06-08 Publication of EP2329125A2 publication Critical patent/EP2329125A2/de

2018-02-21 Application granted granted Critical

2018-02-21 Publication of EP2329125B1 publication Critical patent/EP2329125B1/de

Status Active legal-status Critical Current

2029-08-12 Anticipated expiration legal-status Critical

Links

238000002485 combustion reaction Methods 0.000 title claims description 3
239000008186 active pharmaceutical agent Substances 0.000 claims description 4
230000007423 decrease Effects 0.000 claims description 3
230000002093 peripheral effect Effects 0.000 claims description 3
238000000926 separation method Methods 0.000 claims 1
230000007246 mechanism Effects 0.000 description 3
230000000694 effects Effects 0.000 description 1

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
- F02F3/0076—Pistons the inside of the pistons being provided with ribs or fins

Definitions

the invention relates to a piston for an internal combustion engine with a piston crown, with a land, with a circumferential ring portion, which has annular grooves, and with a piston skirt, which has two arranged on the pressure side and the counter-pressure side shaft walls and two walls connecting the skirt walls together, wherein the box walls are provided with pin bores having pin bosses, and wherein the arranged on the pressure side of the skirt wall viewed in the circumferential direction of the piston is shorter than the arranged on the counter-pressure side skirt wall.
a piston of the type mentioned causes the inclination of a connecting rod under ignition pressure a side force load, which is delivered via the box walls and the shaft to the cylinder wall.
the ignition pressure in combination with a Ausachstechnik or eccentricity of the hub bores leads to a tilting moment, which increases the lateral force load.
Both mechanisms cause a high stress of the piston in the lower region near the free, kolbenteilabgewandten edge of the shaft-box wall connection.
the highest stress is found at or shortly after the ignition pressure maximum on the pressure side of the piston.
the shaft-box wall connection on the counter-pressure side of the piston is in this case loaded comparatively low.
crank mechanisms which are confined to the pressure side, on the other hand increases the stress of the counter-pressure side shaft-box wall connection.
a piston is in the document GB 130 411 A shown. Accordingly, it is an object of the present invention to reduce the stress on the highly stressed, piston bottom facing away region of the pressure and counterpressure side shaft-box wall connection.
the pressure-side box walls are rectilinear and oblique, wherein the distance between the box walls in the region of the pin bosses is greater than in the region of the pressure-side skirt wall. Furthermore, the thickness of the box walls decreases starting from their piston bottom facing away, free edges in the direction of the piston head.
the thickness of the pressure-side box walls starting from the pin boss in the direction of shaft wall increase linearly, resulting in a further reduction of the stress of the highly stressed, piston bottom facing away region of the pressure and counter pressure side shaft-box wall connection.
the wall thicknesses In order to stress the structure homogeneously in the lower area of the shaft-box wall connection, the wall thicknesses must be designed according to the load. This ensures at the same time that unnecessary rigidity disappears and weight can be saved on the strength side.
the box wall thickness increases continuously, while the shaft wall thickness, starting from the end remote from the piston bottom, decreases in the direction of the piston crown. Furthermore, the increase in thickness of the box wall is realized in that the inner contour of the box wall is made obliquely than its outer contour. As a positive side effect from this one obtains a slight increase in the box wall inclination.
the above-described shaft-box wall connection according to the invention is usually carried out on the pressure side. If the counter-pressure side should be loaded higher than the pressure side due to a restricted crank drive, the design principle is applied on the counterpressure side. The lower loaded side of the shaft-box wall connection is then carried out as that described in the German patent application 10 2007 020 447.9 is called back pressure side.
Figures 1 to 3 show an embodiment of the piston 10 according to the invention, which is particularly suitable for use in high-pressure gasoline engines.
the piston 10 has a piston bottom 11 and a peripheral land 12 and a circumferential ring portion 13 with annular grooves 14.
the piston 10 On the side facing away from the piston crown, the piston 10 has a piston shaft 15, which consists of a shaft wall 16 on the pressure side (DS) and a shaft wall 17 on the counter-pressure side (GDS), wherein the shaft walls 16 and 17 are connected via box walls 18 and 19 with each other.
the box walls 18, 19 each have a pin boss 21, each with a hub bore 20.
the skirt wall 16 on the pressure side (DS) viewed in the circumferential direction is shorter than the skirt wall 17 on the counter-pressure side (GDS).
the shaft walls 16,17 are formed asymmetrically.
the thickness "d" of the pressure-side box walls 18, starting from the pin boss 21 toward the skirt wall 16, increases linearly as viewed Figure 2 is apparent.
the thickness "b" of the box walls 18, 19, starting from their piston bottom facing away, free edges in the direction of the piston head 11 from, as is apparent from illustration 1 results.

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)

EP09736093.7A 2008-08-13 2009-08-12 Kolben für einen verbrennungsmotor Active EP2329125B1 (de)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
DE102008038931		2008-08-13
DE102009032379A DE102009032379A1 (de)	2008-08-13	2009-07-08	Kolben für einen Verbrennungsmotor
PCT/DE2009/001119 WO2010017808A2 (de)	2008-08-13	2009-08-12	Kolben für einen verbrennungsmotor

Publications (2)

Publication Number	Publication Date
EP2329125A2 EP2329125A2 (de)	2011-06-08
EP2329125B1 true EP2329125B1 (de)	2018-02-21

Family

ID=41528325

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP09736093.7A Active EP2329125B1 (de)	2008-08-13	2009-08-12	Kolben für einen verbrennungsmotor

Country Status (6)

Country	Link
US (1)	US20110174153A1 (pt)
EP (1)	EP2329125B1 (pt)
JP (1)	JP2011530669A (pt)
BR (1)	BRPI0918437B1 (pt)
DE (1)	DE102009032379A1 (pt)
WO (1)	WO2010017808A2 (pt)

Families Citing this family (10)

* 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
DE102011080822A1 (de)	2011-08-11	2013-02-14	Mahle International Gmbh	Kolben
DE102012203570A1 (de)	2012-03-07	2013-09-12	Mahle International Gmbh	Gegossener Leichtmetallkolben, insbesondere ein Aluminiumkolben
US10184421B2 (en)	2012-03-12	2019-01-22	Tenneco Inc.	Engine piston
BR102012032765A2 (pt) *	2012-12-20	2014-09-30	Mahle Int Gmbh	Pistão de motor de combustão interna
CN105940213B (zh) *	2013-11-07	2019-11-26	天纳克股份有限公司	整体式无通道活塞及其构造方法
DE102015217911A1 (de) *	2015-09-18	2017-03-23	Mahle International Gmbh	Kolben für eine Brennkraftmaschine
DE102016201628A1 (de) *	2016-02-03	2017-08-03	Federal-Mogul Nürnberg GmbH	Kolben aus Stahl- oder Grauguss für einen Verbrennungsmotor und Verfahren zur Herstellung eines Kolbens durch Stahl- oder Grauguss
DE102018203226A1 (de)	2018-03-05	2019-09-05	Federal-Mogul Nürnberg GmbH	Kolben für einen Verbrennungsmotor
CN108412630A (zh) *	2018-04-28	2018-08-17	江西腾勒动力有限公司	三缸发动机活塞

Family Cites Families (31)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1719092A (en) *		1929-07-02		Piston
GB130411A (en) *	1918-02-18	1919-08-07	Harry Ralph Ricardo	Improvements in or relating to Pistons for Internal Combustion Engines.
US1653253A (en) *	1924-11-10	1927-12-20	Earl Holley	Piston
US1774064A (en) *	1929-11-18	1930-08-26	Miller Dorr	Compensating piston
US1960313A (en) *	1929-12-30	1934-05-29	Elmer C Long	Piston for an internal combustion motor
US1944223A (en) *	1933-07-08	1934-01-23	Ray E Day	Piston
US2120090A (en) *	1935-07-15	1938-06-07	Ray E Day	Piston
US2147819A (en) *	1935-10-14	1939-02-21	Elmer C Long	Piston for internal combustion motors
US2149862A (en) *	1936-07-20	1939-03-07	Adolph L Nelson	Piston
US2141784A (en) *	1937-01-22	1938-12-27	Motor Res Corp	Piston
US2177574A (en) *	1938-02-25	1939-10-24	Circle Motor Corp	Piston
US3452649A (en) *	1966-12-13	1969-07-01	Andre Cornet	Pistons
US3987709A (en) *	1975-04-07	1976-10-26	Day Ray E	Piston
DE3425965A1 (de) *	1984-07-14	1986-01-16	Kolbenschmidt AG, 7107 Neckarsulm	Leichtmetallkolben fuer brennkraftmaschinen
US5000078A (en) *	1987-04-18	1991-03-19	Mahle Gmbh	Light metal trunk piston for internal combustion engines
JPH0736109Y2 (ja) *	1989-04-07	1995-08-16	トヨタ自動車株式会社	内燃機関のピストン
JP2561798Y2 (ja) *	1989-05-22	1998-02-04	株式会社ユニシアジェックス	エンジン用ピストン
JP2762575B2 (ja) *	1989-06-19	1998-06-04	アイシン精機株式会社	ピストン
US5076225A (en) *	1989-12-28	1991-12-31	Toyota Jidosha Kabushiki Kaisha	Piston for an internal combustion engine
JPH078541U (ja) *	1993-07-07	1995-02-07	本田技研工業株式会社	内燃機関用ピストン
JPH07247901A (ja) *	1994-03-04	1995-09-26	Toyota Motor Corp	内燃機関用ピストン
DE4414678A1 (de) *	1994-04-27	1995-11-02	Mahle Gmbh	Leichtmetallkolben für Verbrennungsmotoren
JPH09329056A (ja) *	1996-06-11	1997-12-22	Toyota Motor Corp	内燃機関用ピストン
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
JP2002317691A (ja) *	2001-04-19	2002-10-31	Unisia Jecs Corp	内燃機関のピストン
JP2002332912A (ja) *	2001-04-30	2002-11-22	Honda Motor Co Ltd	内燃機関用ピストン
ATE305088T1 (de) *	2002-03-25	2005-10-15	Brp Rotax Gmbh & Co Kg	Kolben
JP4544177B2 (ja) *	2006-02-20	2010-09-15	マツダ株式会社	エンジンのピストン構造
DE102007020447A1 (de) *	2007-04-27	2008-10-30	Mahle International Gmbh	Kolben für einen Verbrennungsmotor

2009
- 2009-07-08 DE DE102009032379A patent/DE102009032379A1/de not_active Withdrawn
- 2009-08-12 US US12/737,751 patent/US20110174153A1/en not_active Abandoned
- 2009-08-12 BR BRPI0918437 patent/BRPI0918437B1/pt active IP Right Grant
- 2009-08-12 EP EP09736093.7A patent/EP2329125B1/de active Active
- 2009-08-12 JP JP2011522381A patent/JP2011530669A/ja active Pending
- 2009-08-12 WO PCT/DE2009/001119 patent/WO2010017808A2/de active Application Filing

Also Published As

Publication number	Publication date
JP2011530669A (ja)	2011-12-22
BRPI0918437B1 (pt)	2019-11-26
EP2329125A2 (de)	2011-06-08
WO2010017808A3 (de)	2010-04-15
US20110174153A1 (en)	2011-07-21
DE102009032379A1 (de)	2010-02-18
BRPI0918437A2 (pt)	2015-11-24
WO2010017808A2 (de)	2010-02-18

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Publication	Publication Date	Title
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WO2008131739A1 (de)	2008-11-06	Kolben für einen verbrennungsmotor
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