EP3545182B1 - Piston en acier pour moteur à combustion interne - Google Patents

Piston en acier pour moteur à combustion interne Download PDF

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Publication number
EP3545182B1
EP3545182B1 EP17758471.1A EP17758471A EP3545182B1 EP 3545182 B1 EP3545182 B1 EP 3545182B1 EP 17758471 A EP17758471 A EP 17758471A EP 3545182 B1 EP3545182 B1 EP 3545182B1
Authority
EP
European Patent Office
Prior art keywords
piston
shank
shank surface
internal combustion
combustion engine
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.)
Active
Application number
EP17758471.1A
Other languages
German (de)
English (en)
Other versions
EP3545182A1 (fr
Inventor
Ralf Meske
Lukas Merz
Michael Kraemer
Christoffer SCHMOLL
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
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Filing date
Publication date
Application filed by Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH
Publication of EP3545182A1 publication Critical patent/EP3545182A1/fr
Application granted granted Critical
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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
    • 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
    • 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 
    • F02F3/0084—Pistons  the pistons being constructed from specific materials
    • 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

Definitions

  • the invention relates to a steel piston for an internal combustion engine.
  • steel pistons are often used, which are generally designed to be rotationally symmetrical with respect to the piston axis.
  • FIG US 2012/0037112 A1 the piston according to FIG US 2012/0037112 A1 called.
  • the US 8,220,432 B2 or from the WO2015 / 024551 A1 a piston emerges which is asymmetrical with regard to its skirt surfaces.
  • the width of the skirt surfaces usually results from the installation space conditions that are specified in the interior of the piston by the small connecting rod eye and the oil spray nozzle position. Due to the high peak cylinder pressures, the small connecting rod eye on heavy-duty pistons is relatively wide.
  • the oil spray nozzle is placed next to the installation space used by the connecting rod pivoting movement, whereby the inner minimum width of the shaft surfaces is specified. This results in a skirt width which is 70-80% of the piston diameter.
  • the connecting walls between the skirt surface and the piston hub are usually straight.
  • the invention is based on the object of creating a steel piston which is improved in terms of friction and fuel consumption.
  • shaft surfaces one of which is 25-50% narrower than the other.
  • the selection of the shaft surface to be reduced in width results from the position of the oil spray nozzle, with the unchanged, wider shaft surface preferably being provided on the side with the oil spray nozzle and the opposite shaft surface representing the side to be reduced.
  • the rotational symmetry usually provided for steel pistons is abandoned, the requirements being further met by the steel piston according to the invention, and advantageously not only the friction but also the weight can be reduced.
  • the steel piston according to the invention is preferably used in heavy-duty diesel engines. Extensive simulation calculations have shown that the friction of a heavy-duty steel piston at a normal operating point for motorway travel is mainly determined by the hydrodynamic component. The hydrodynamic friction depends, among other factors, on the size of the contact surfaces. Therefore, a reduction in fuel consumption is achieved by reducing the width of the skirt contact surfaces of the piston.
  • a cooling channel outlet is to be provided, which is preferably arranged on the side of the smaller skirt area.
  • the cooling duct outlet is provided centrally according to the invention, so that the outflowing oil advantageously reaches the pivoting connecting rod and is thus partially transported in the direction of the small connecting rod eye, so that lubrication takes place here in an advantageous manner.
  • This arrangement also advantageously makes it possible to dispense with a further outlet or drainage bore.
  • the shank surfaces are connected to the pin hub by so-called connecting walls.
  • the invention described here enables the connection of at least one shaft surface to be implemented at an angle, which is advantageous for the rigidity of the connection.
  • the rigidity of the wider shaft surface which is preferably provided on the pressure side, it offers Advantages if this has at least one convexity, a thickening or a bulge.
  • the steel piston according to the invention consists of at least two components connected by friction welding.
  • the lower piston part can be manufactured by forging or casting.
  • a draft angle must be provided for the forging manufacturing process. This results in an embodiment of the skirt surfaces in which the skirt surfaces are each wider at their end facing the piston head than at the opposite end.
  • a skirt surface 12 on the counter-pressure side is significantly smaller, in particular narrower, as in the side view of FIG Fig. 2 recognizable. However, it can also be the shaft surface 14 on the The pressure side can be made smaller if the position of the oil spray nozzle is on the counter pressure side.
  • a cooling channel outlet 16 is arranged essentially centrally, while the cooling channel inlet 24 is provided laterally.
  • the shaft wall has a convexity 22 on this side on its inside at the lower end. However, it preferably extends over the entire "height" of the skirt wall in the direction of the piston axis. In other words, the shaft wall is essentially thickened in the middle or bulged towards the inside.
  • the convexity extends, for example, over approximately one third of the width of the shaft surface 14 and, like the two transitions to the wall thickness of the shaft surface 14, is rounded. In this respect, a concavity is created on both sides of the convexity 22.
  • the smaller skirt surface 12 is somewhat wider at its end directed towards the piston head 18 than at the opposite end.
  • the width measured in the circumferential direction at the upper end is a maximum of 120% of the width at the lower end.
  • the lateral edges of at least one, preferably both, shaft surfaces 12, 14 run largely in a straight line.
  • the larger shaft surface 14 has an essentially identical width at the upper and lower ends.

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)

Claims (5)

  1. Piston en acier (10) pour un moteur à combustion, avec au moins un canal de refroidissement et des surfaces de tige (12, 14) avec lesquelles le piston (10), à l'état monté, s'appuie sur un côté pression et un côté contre-pression contre un alésage de cylindre ou une chemise de cylindre,
    dans lequel une surface de tige (12) présente une largeur 25-50 % plus petite que l'autre surface de tige, et
    une sortie de canal de refroidissement (16) est disposée au centre du côté de la surface de tige plus étroite.
  2. Piston selon la revendication 1, caractérisé en ce que la surface de tige (12) plus étroite est plus large à une extrémité dirigée vers une un fond de piston (18) qu'à une extrémité opposée au fond de piston (18).
  3. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce que les surfaces de tige (12, 14) sont reliées à un moyeu de piston (26) par l'intermédiaire de parois de liaison (20), et au moins une paroi de liaison (20) est conçue en biais entre la surface de tige (12, 14) et le moyeu de piston (26).
  4. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface de tige (14) plus large présente au moins une convexité (22) sur le côté intérieur.
  5. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce que celui-ci est constitué d'au moins deux composants assemblés par soudage par friction.
EP17758471.1A 2016-11-28 2017-08-17 Piston en acier pour moteur à combustion interne Active EP3545182B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016223530.3A DE102016223530A1 (de) 2016-11-28 2016-11-28 Stahlkolben für einen Verbrennungsmotor
PCT/EP2017/070830 WO2018095601A1 (fr) 2016-11-28 2017-08-17 Piston en acier pour moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP3545182A1 EP3545182A1 (fr) 2019-10-02
EP3545182B1 true EP3545182B1 (fr) 2020-11-25

Family

ID=59738312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17758471.1A Active EP3545182B1 (fr) 2016-11-28 2017-08-17 Piston en acier pour moteur à combustion interne

Country Status (7)

Country Link
US (1) US11131269B2 (fr)
EP (1) EP3545182B1 (fr)
KR (1) KR102384112B1 (fr)
CN (1) CN109996948B (fr)
DE (1) DE102016223530A1 (fr)
MX (1) MX2019006116A (fr)
WO (1) WO2018095601A1 (fr)

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR822409A (fr) * 1936-09-05 1937-12-30 Perfectionnements au moulage des pistons, à ces pistons et nouveaux pistons obtenus
JPS63112666U (fr) * 1987-01-14 1988-07-20
JP2549460Y2 (ja) * 1990-01-10 1997-09-30 トヨタ自動車株式会社 内燃機関用ピストン
JPH03112551U (fr) * 1990-03-02 1991-11-18
KR970062277A (ko) * 1996-02-29 1997-09-12 도오다 고오이찌로 내연 기관용 피스톤
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
JP2000303905A (ja) * 1999-04-16 2000-10-31 Toyota Motor Corp ピストンの冷却構造
US6244161B1 (en) * 1999-10-07 2001-06-12 Cummins Engine Company, Inc. High temperature-resistant material for articulated pistons
US6588320B2 (en) * 1999-12-30 2003-07-08 Federal-Mogul World Wide, Inc. Piston having uncoupled skirt
GB2367602B (en) 2000-10-07 2004-10-27 Federal Mogul Bradford Ltd Piston for internal combustion engine
JP2002317691A (ja) * 2001-04-19 2002-10-31 Unisia Jecs Corp 内燃機関のピストン
US6526871B1 (en) * 2001-08-24 2003-03-04 Federal-Mogul World Wide, Inc. Monobloc piston for diesel engines
DE10230746B4 (de) * 2002-07-09 2015-10-01 Ks Kolbenschmidt Gmbh Kolben
BRPI0718657A2 (pt) * 2006-11-08 2013-11-19 Federal Mogul Corp Conjunto de pistão
JP5063634B2 (ja) 2009-03-12 2012-10-31 日立オートモティブシステムズ株式会社 内燃機関のピストン
US9970384B2 (en) 2009-11-06 2018-05-15 Federal-Mogul Llc Steel piston with cooling gallery and method of construction thereof
US8807109B2 (en) * 2009-11-06 2014-08-19 Federal-Mogul Corporation Steel piston with cooling gallery and method of construction thereof
JP5543908B2 (ja) * 2010-12-24 2014-07-09 本田金属技術株式会社 エンジン用のピストン
DE102011080822A1 (de) 2011-08-11 2013-02-14 Mahle International Gmbh Kolben
DE112012005520B4 (de) * 2011-12-28 2022-11-17 Honda Motor Co., Ltd. Kolben für Verbrennungsmotor
DE102012203570A1 (de) * 2012-03-07 2013-09-12 Mahle International Gmbh Gegossener Leichtmetallkolben, insbesondere ein Aluminiumkolben
CN202970934U (zh) 2012-12-07 2013-06-05 山东滨州渤海活塞股份有限公司 新型汽油机轻量化内冷镶圈活塞
DE102013013962A1 (de) * 2013-08-23 2015-02-26 Mahle International Gmbh Baueinheit aus einem Kolben und einer Anspritzdüse für einen Verbrennungsmotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20210115874A1 (en) 2021-04-22
WO2018095601A1 (fr) 2018-05-31
KR20190086501A (ko) 2019-07-22
CN109996948A (zh) 2019-07-09
US11131269B2 (en) 2021-09-28
CN109996948B (zh) 2022-06-17
DE102016223530A1 (de) 2018-05-30
MX2019006116A (es) 2019-08-01
EP3545182A1 (fr) 2019-10-02
KR102384112B1 (ko) 2022-04-06

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