EP3371443B1 - Soutien de moyeu optimisé - Google Patents

Soutien de moyeu optimisé Download PDF

Info

Publication number
EP3371443B1
EP3371443B1 EP16790990.2A EP16790990A EP3371443B1 EP 3371443 B1 EP3371443 B1 EP 3371443B1 EP 16790990 A EP16790990 A EP 16790990A EP 3371443 B1 EP3371443 B1 EP 3371443B1
Authority
EP
European Patent Office
Prior art keywords
recess
piston
web
inner region
pin bore
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
EP16790990.2A
Other languages
German (de)
English (en)
Other versions
EP3371443A1 (fr
Inventor
Matthias Laqua
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.)
KS Kolbenschmidt GmbH
Original Assignee
KS Kolbenschmidt 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.)
Filing date
Publication date
Application filed by KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP3371443A1 publication Critical patent/EP3371443A1/fr
Application granted granted Critical
Publication of EP3371443B1 publication Critical patent/EP3371443B1/fr
Active legal-status Critical Current
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 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • 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

Definitions

  • the invention relates to a piston, assembled from an upper part having a cooling channel and a lower part having a bolt bore, wherein the upper part and the lower part have contact surfaces facing each other and the two parts are held together by means of at least one screw connection, according to the features of the preamble of patent claim 1.
  • Such assembled pistons also referred to as large pistons, are known.
  • An upper part of such a piston is manufactured separately from a lower part of the piston using the same or different processes and from the same or different materials, and the two parts are brought together via their mutually facing contact surfaces, with the permanent connection of both parts being achieved by means of at least one screw connection.
  • pistons are used in internal combustion engines, for example for locomotives, ships and the like, and have very large dimensions compared to pistons for internal combustion engines in passenger cars, for example. Accordingly, not only is the load high, but also the weight due to the size of the piston.
  • a piston is made of DE102006055251 known.
  • the invention is therefore based on the object of providing a piston, in particular a large piston, for internal combustion engines, in which the weight is reduced while maintaining the necessary strength to meet the requirements in the internal combustion engine.
  • the lower part has a recess directed towards an outer circumference, starting from its inner region above an apex of the pin bore, and at least one web, also pointing towards the outer circumference, above the pin bore, starting from an outer region.
  • material is deliberately removed from a particular location in the inner region of this piston in order to save weight. This removal of material takes place at locations where the loads on the piston are reduced during operation of the internal combustion engine as a result of the combustion pressures.
  • material is removed from the inner region of the piston in pistons where the upper part has a support surface for the lower part and the lower part has a corresponding support surface for the upper part.
  • the invention further provides that a web is also provided in the direction of the outer circumference above the pin bore. This at least one web, which runs parallel to the piston stroke axis, directly supports the underside of the upper part.
  • the lower part is provided with a circumferential web on its upper edge, to which the web arranged above the apex of the pin bore is arranged perpendicularly.
  • the weight is thus reduced by reducing the material by realizing the recess in the inner region of the lower part of the piston and at the same time the strength is increased by a web on the outside above the pin bore.
  • At least one recess is made in the lower part in addition to the at least one web.
  • Such a further recess has the advantage that material is removed at points around the bolt hole (bolt hub) that do not weaken the strength of the lower part or do not weaken it significantly.
  • the combination of web and recess next to the web means that further material can be reduced while maintaining the required strength.
  • the recess in the inner region of the piston extends over a rounded area into the inner region of the lower part. This effectively prevents sharp-edged transitions from the inner region into the recess, so that cracks in these areas are also effectively prevented when the piston is operating in the internal combustion engine.
  • a single web is provided above the apex of the pin bore. While it is alternatively conceivable to provide, for example, two webs running parallel to one another and spaced apart, a single web is particularly advantageous because, on the one hand, it ensures the required support of the upper part precisely in the area in which its greatest deformation occurs and, in addition, does not increase the additional weight compared to a piston without such a web in order to achieve the weight reduction through the recess in the inner area of the lower part of the piston.
  • the upper part has a through-opening in its interior above the recess in the direction of an inner region located inside the upper part. Cooling oil can be injected into this inner region inside the upper part through this through-opening. It is also conceivable that a connection to this inner region inside the upper part is created from the cooling channel in order to create an exchange of cooling oil between the circumferential ring-shaped cooling channel located behind a ring field and the inner region inside the upper part.
  • the recess in the inner area of the lower part merges into this passage opening, preferably in a rounded manner, in order to further save material and avoid cracking.
  • the piston 1 has an upper part 2 and a lower part 3.
  • the upper part 2 is designed in a manner known per se and has at least one ring field (here with three ring grooves), as well as, for example, a combustion chamber bowl, valve pockets and the like.
  • a cooling channel 4 is created, for which the two parts 2, 3 have corresponding ring-shaped recesses that are open at the bottom and at the top.
  • 5 designates an inner region that is also created by assembling the two parts 2, 3.
  • the lower part 3 has a pin bore 6 (with a pin hub surrounding it, not designated in more detail).
  • a piston stroke axis 7 runs through the pin axis of the pin bore 6 (not designated in more detail), with 8 designating an upper vertex of the pin bore 6. Furthermore, the lower part 3 has a passage opening 9 directed in the direction of the inner region 5, as well as a piston shaft and further, known elements for realizing the function of the lower part 3 of the piston 1.
  • the lower part 3 has a recess 10 in its inner area, which is arranged above the apex 8 of the bolt hole 6.
  • the recess 10 extends from the inner region of the lower part 3 in the direction of the outer circumference of the piston 1, without creating an opening in the direction of the outer circumference.
  • the recess 10 has the advantageously shown shape, wherein the edge regions of the recess 10 merge into the inner region of the lower part 3 via a rounded transition 11.
  • the upper part 2 is connected (screwed) to the lower part 3 by means of a screw connection 12.
  • the screw connection 12 in Figure 4 is only indicated for the sake of completeness, so that although not shown, there is a passage opening in the lower part 3 for a screw, which is passed through this opening from below and is screwed into a corresponding thread in the upper part 2.
  • This Screw connection 12 is present multiple times, at least twice, distributed around the circumference.
  • a web 13 corresponding to the recess 10 can be seen, which is also arranged above the apex 8 of the bolt hole +6.
  • This web 13 stands out from the surface of the bolt hub around the bolt hole 6.
  • a recess 14 is provided next to the web 13 (either only to the right or only to the left of it or on both sides).
  • the web 13 is rounded and merges into the base of the recess 14 or into the corresponding areas of the bolt hub.
  • the upper end of the web 13 can either be supported directly on the underside of the upper part 2, whereby in Figure 5
  • the lower part 3 has an arcuate web section at its upper end between the two side edges of the piston skirt, which is supported by the web 13. This arcuate web section between the two side edges of the piston skirts results in improved force introduction and force distribution from the upper part 2 into the lower part 3 via the at least one web 13.
  • FIG. 7 to 9 A first embodiment of the shape of the recess 10 is shown.
  • the position of the recess 10 in the lower part 3 is also clearly visible.
  • Figure 8 from which it can be seen that the recess 10 extends from the inner region of the lower part 3 towards the outer circumference of the piston 1 (when looking at the Figure 8 the right end of the hatched area).
  • a further embodiment of the recess 10 is shown in the Figures 10 to 12 shown.
  • the recess 10 merges into the inner area of the lower part 3 via a rounded transition 11.
  • a rounded transition 11 is also provided in the recess 10 according to Figure 7 to 9 intended.
  • Figure 14 shows the lower part 3 again in a three-dimensional representation, whereby in the upper part of this Figure 14 It is clearly visible that the lower part 3 has a shoulder which forms a support surface for the upper part 2.
  • pin bore is understood to mean a bore in the lower part 3, in each of which one end of a piston pin is arranged and the intermediate area accommodates the small connecting rod eye.

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)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)

Claims (5)

  1. Piston (1), assemblé à partir d'une partie supérieure (2) comprenant un canal de refroidissement (4) et d'une partie inférieure (3) comprenant un alésage d'axe (6), dans lequel la partie supérieure (2) et la partie inférieure (3) comprennent des surfaces d'appui se faisant face et les deux parties (2, 3) sont maintenues ensemble au moyen d'au moins une liaison par vis (12), dans lequel la partie inférieure (3), en partant de sa région intérieure au-dessus d'un sommet (8) de l'alésage d'axe (6), comprend un évidement (10) orienté dans la direction d'une circonférence extérieure (15) et, en partant d'une région extérieure, comprend au moins une nervure (13) au-dessus de l'alésage d'axe (6), laquelle au moins une nervure (13) pointe également dans la direction de la circonférence extérieure (15), caractérisé en ce que l'évidement (10) fusionne dans la région intérieure de la partie inférieure (3) par le biais d'une transition arrondie (11).
  2. Piston (1) selon la revendication 1, caractérisé en ce qu'une unique nervure (13) est disposée au-dessus du sommet (8) de l'alésage (6).
  3. Piston (1) selon la revendication 1 ou la revendication 2, caractérisé en ce que l'au moins un évidement (14) est ménagé dans la partie inférieure (3) à proximité de l'au moins une nervure (13).
  4. Piston (1) selon l'une des revendications précédentes, caractérisé en ce que la partie inférieure (3) comprend une ouverture de passage (9) au-dessus de l'évidement (10) dans la direction d'une région intérieure (5) située à l'intérieur de la partie supérieure (2).
  5. Piston (1) selon la revendication 4, caractérisé en ce que l'évidement (10) est arrondi dans l'ouverture de passage (9).
EP16790990.2A 2015-11-02 2016-11-02 Soutien de moyeu optimisé Active EP3371443B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015221370 2015-11-02
PCT/EP2016/076458 WO2017076920A1 (fr) 2015-11-02 2016-11-02 Soutien de moyeu optimisé

Publications (2)

Publication Number Publication Date
EP3371443A1 EP3371443A1 (fr) 2018-09-12
EP3371443B1 true EP3371443B1 (fr) 2024-04-10

Family

ID=57233451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16790990.2A Active EP3371443B1 (fr) 2015-11-02 2016-11-02 Soutien de moyeu optimisé

Country Status (8)

Country Link
US (1) US10871125B2 (fr)
EP (1) EP3371443B1 (fr)
JP (1) JP6692424B2 (fr)
KR (1) KR20180078251A (fr)
CN (1) CN108271404B (fr)
DE (1) DE102016120907A1 (fr)
FI (1) FI3371443T3 (fr)
WO (1) WO2017076920A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112019021016A2 (pt) 2017-04-19 2020-05-05 Ks Kolbenschmidt Gmbh pistão em construção estrutural
WO2019096827A1 (fr) 2017-11-14 2019-05-23 Ks Kolbenschmidt Gmbh Piston en acier à design optimisé

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB268399A (en) * 1925-10-07 1927-04-07 Adolph Lincoln Nelson Pistons

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2307347A1 (de) 1973-02-15 1974-08-22 Maschf Augsburg Nuernberg Ag Mehrteiliger tauchkolben fuer viertaktbrennkraftmaschinen, insbesondere grossdieselmotoren
DE2919638A1 (de) * 1979-05-16 1980-11-20 Schmidt Gmbh Karl Kolben fuer brennkraftmaschinen
JPS59168556U (ja) * 1983-04-27 1984-11-12 ヤンマーディーゼル株式会社 組合せピストン構造
DE3842321A1 (de) * 1988-12-16 1990-06-21 Kolbenschmidt Ag Kolben mit oelkuehlung fuer brennkraftmaschinen
US6477941B1 (en) * 1999-10-08 2002-11-12 Federal-Mogul World Wide, Inc. Dual gallery piston
WO2001050042A1 (fr) * 1999-12-30 2001-07-12 Federal-Mogul Corporation Piston a jupe decouplee
GB2366607B (en) * 2000-09-06 2004-06-09 Federal Mogul Bradford Ltd Piston for internal combustion engine
US6840155B2 (en) * 2000-10-18 2005-01-11 Federal-Mogul World Wide, Inc. Multi-axially forged piston
US7104183B2 (en) * 2004-07-07 2006-09-12 Karl Schmidt Unisia, Inc. One-piece steel piston
DE102005041409A1 (de) * 2005-09-01 2007-03-08 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE502006008456D1 (de) 2005-12-17 2011-01-13 Mahle Int Gmbh Zweiteiliger kolben für einen verbrennungsmotor
DE102006055251A1 (de) 2006-11-23 2008-05-29 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102009045437A1 (de) 2009-10-07 2011-04-14 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor und Verbrennungsmotor mit einem Kolben
DE102009059056A1 (de) * 2009-12-18 2011-06-22 MAHLE International GmbH, 70376 Kolben für einen Verbrennungsmotor
DE102010025508A1 (de) * 2010-06-29 2011-12-29 Mahle International Gmbh Kolben für einen Verbrennungsmotor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB268399A (en) * 1925-10-07 1927-04-07 Adolph Lincoln Nelson Pistons

Also Published As

Publication number Publication date
CN108271404A (zh) 2018-07-10
FI3371443T3 (en) 2024-07-17
JP6692424B2 (ja) 2020-05-13
DE102016120907A1 (de) 2017-05-04
KR20180078251A (ko) 2018-07-09
JP2018534470A (ja) 2018-11-22
CN108271404B (zh) 2021-07-20
EP3371443A1 (fr) 2018-09-12
US10871125B2 (en) 2020-12-22
WO2017076920A1 (fr) 2017-05-11
US20180313293A1 (en) 2018-11-01

Similar Documents

Publication Publication Date Title
EP3027874B1 (fr) Construction légère d'un piston diesel
EP1920151A1 (fr) Piston de construction legere
EP3371443B1 (fr) Soutien de moyeu optimisé
WO2017025608A1 (fr) Piston pour moteur à combustion interne
DE4434994C2 (de) Kolben für Brennkraftmaschinen
WO2013131937A1 (fr) Piston coulé en alliage léger, notamment piston en aluminium
EP2742225B1 (fr) Piston
WO2013004218A1 (fr) Piston pour un moteur à combustion interne
EP1920174B1 (fr) Geometrie d'alesage d'axe de piston continue destinee a un piston d'un moteur a combustion interne
DE102015201633A1 (de) Kolben für einen Verbrennungsmotor sowie Verfahren zur Herstellung des Kolbens für einen Verbrennungsmotor
DE102009031655B4 (de) Verfahren zum Herstellen eines Motorzylinderblocks
DE3538978C1 (en) Piston-ring arrangement for trunk pistons
WO2017190952A1 (fr) Piston
EP3545182B1 (fr) Piston en acier pour moteur à combustion interne
DE102017109471A1 (de) Kolben
DE102010047972A1 (de) Kolbenvorrichtung
AT517578B1 (de) Kolben einer brennkraftmaschine
WO2021018683A1 (fr) Piston avec rainure annulaire de fixation dans l'alésage de broche pour un moteur à combustion interne
EP3362666A1 (fr) Jupe de piston à support central
DE102023000277A1 (de) Zylinderkurbelgehäuse und Brennkraftmaschine mit einem solchen Zylinderkurbelgehäuse
DE102012103556B4 (de) Verfahren zur Herstellung einer Kurbelwelle und Schmiedewerkzeug
WO2020053260A1 (fr) Piston pour moteurs à combustion interne
WO2019238528A1 (fr) Piston moulé pour un moteur à combustion, composé d'un matériau à base de fer
DE102016103606A1 (de) Lagervorrichtung für die Lagerung von zwei parallelen Nockenwellen

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180326

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20200713

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20231106

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502016016464

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20240410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240810

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240711

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240812