EP1180592B1 - Piston en acier - Google Patents

Piston en acier Download PDF

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Publication number
EP1180592B1
EP1180592B1 EP20010117240 EP01117240A EP1180592B1 EP 1180592 B1 EP1180592 B1 EP 1180592B1 EP 20010117240 EP20010117240 EP 20010117240 EP 01117240 A EP01117240 A EP 01117240A EP 1180592 B1 EP1180592 B1 EP 1180592B1
Authority
EP
European Patent Office
Prior art keywords
piston
base part
gap
annular section
projection
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.)
Expired - Lifetime
Application number
EP20010117240
Other languages
German (de)
English (en)
Other versions
EP1180592A2 (fr
EP1180592A3 (fr
Inventor
Ulrich Landau
Werner Landvatter
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7652919&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1180592(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP1180592A2 publication Critical patent/EP1180592A2/fr
Publication of EP1180592A3 publication Critical patent/EP1180592A3/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 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Definitions

  • the invention relates to a piston for an internal combustion engine according to the features of the preamble of claim 1.
  • a piston for an internal combustion engine is known from EP 0 804 680 B1, in which a ring section or a lower part of the ring section is connected to the piston crown or an upper part of the ring section via a welding or soldering process. Through the ring section and the piston crown (base part) creates a circumferential, downwardly free space, which is closed by a component, so that a cooling channel is formed.
  • a piston is also known, in which a ring portion is welded to a base part of the piston. A circumferential wall of the base part and the component welded to the base part together form a radially outer and an axial-lower boundary wall of a cooling channel.
  • This piston has a plurality of holes directed into the cooling channel, via which the cooling channel is supplied with a cooling medium, in particular engine oil. This cooling medium is injected by appropriate means into the piston inner region and fed via the bores to the cooling channel. The drain also takes place via these holes.
  • the cooling channel has the purpose that is cooled by the coolant channel flowing through the cooling medium, in particular engine oil, the piston crown area to protect it from damage due to high Brennraumtemparaturen.
  • the cooling medium in particular engine oil
  • DE 36 43 039 A1 or DE 198 46 152 A1 existing between the cooling channel and the interior of the piston holes represent an additional manufacturing step. At the same time, these holes are located at a point in the piston, which weakens the strength of the piston.
  • the invention is therefore based on the object to simplify a piston for an internal combustion engine in terms of its production, without the stability is reduced.
  • At least one further opening in particular a circumferential gap, is present.
  • this opening the cooling medium can be removed from the cooling channel, so that can be dispensed with additional holes in the piston except the opening for the supply of the cooling medium.
  • the supply of the cooling medium takes place in an advantageous manner via at least one opening, which is likewise provided in the ring section.
  • the gap is formed by the attachment and the shape of the ring portion with respect to the base part. This means that the ring portion and the corresponding region of the base part are matched to one another such that after attachment of the ring portion, the gap arises by itself. Work steps for introducing the gap are thus eliminated altogether.
  • the further opening in particular the gap, is introduced after the attachment of the ring section to the base part.
  • the shape of the ring portion and the corresponding shape of the base part are coordinated so that after attachment of the ring portion of the cooling channel is largely or completely closed.
  • the introduction of the at least one further opening (of the gap) takes place, wherein it may also be instead of a circumferential gap to several holes or teilumfnature columns.
  • this requires a further operation, however, it can be accepted because the opening for the purpose of supplying the cooling medium is arranged in a region of the piston through which the piston crown region is not weakened.
  • the ring section can be attached to the base part by means of a welding method. This can be mounted on the base part in a simple and known manner, the ring portion after its production. Base part and ring section can both be produced by casting, for example.
  • the piston is preferably made of steel.
  • a weld joint is arranged in alignment with the gap. This has the advantage that the joint and the gap region of the base part can be machined prior to attachment of the ring portion with the same degree.
  • Figure 1 shows a detail of the bottom portion of a piston for an internal combustion engine. It is a pendulum piston. The remainder of the design of the piston is not important, for the sake of completeness reference is made to the construction of a piston on FIG. 1 together with the associated description of EP 0 804 680 B1 or FIG. 1 together with the associated description of DE 198 46 152 A1.
  • the piston shown in Figure 1 has a base part 1, wherein in the bottom region of a combustion bowl 2 is present.
  • a prefabricated ring section 3, which later carries the piston rings, is attached to the base part by means of a welding process in the region of a welding joint 4.
  • the ring portion 3 has a web 5, which is directed in the direction of the base part 1, but does not come to rest on this, so that the web 5 and the corresponding region of the base part 1 form a gap 6.
  • a cooling channel 7, which is also formed by the shape of the base part 1 and the ring portion 3, cooling medium, such as engine oil, are supplied.
  • the gap 6 is shown larger in the figures for the purpose of illustrating the geometric configuration than in reality.
  • the gap 6, that is, the gap, or even the size of the one or more openings, is to be chosen so that an optimal volume flow into thedeknanal 7 in and is given out in particular on the gap 6 out.
  • the cooling medium sufficiently long time in the cooling channel 7 remains to absorb the heat, and is discharged in good time.
  • the ring portion 3 can be pushed from below, so over the piston shaft, in its end position, since the inner diameter of the ring portion 3 in the region of the web fifth it is not allowed to push the ring section 3 over the floor area. This is possible with pendulum piston, since the diameter in the region of the piston shaft is smaller than the inner diameter in the region of the web fifth
  • Figure 2 shows a similar construction of a piston as in Figure 1, but with the difference that both the base part 1 and the ring portion 3 each have mutually facing projections 8 and 9, which form the gap 6.
  • the projections 8 and. 9 can be the same or different lengths.
  • the welding joint 4 and the gap 6 are in alignment, thereby simplifying the machining of the components involved.
  • a construction shown in FIG. 2 can be realized both in the case of pendulum and monobloc pistons, since the inner diameter in the area of the projection 9 (after the final assembly of the ring section 3 on the base part 1) is in any case equal to or greater than the diameter of the bottom area without the ring section 3.
  • the front side of the projection 9 can exceed the vertical line to the left, both in the case of pendulum piston and monoblock piston.
  • the ring portion has an at least opening through which the cooling medium is injected by suitable means in the internal combustion engine in the cooling channel. This opening and the funds are available in any case.

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)

Claims (7)

  1. Piston pour un moteur à combustion interne, le piston se composant d'au moins une partie de base (1) et d'une section annulaire (3) montée sur celle-ci et la partie de base (1) formant avec la section annulaire (3) un canal de refroidissement (7), un réfrigérant pouvant être acheminé au canal de refroidissement (7) par le biais d'une ouverture, caractérisé en ce qu'après l'usinage final du piston, il existe entre la partie de base (1) et la section annulaire (3) au moins une ouverture supplémentaire, notamment une fente périphérique (6).
  2. Piston selon la revendication 1, caractérisé en ce que la fente (6) est formée par le montage et la forme de la section annulaire (3) par rapport à la partie de base (1).
  3. Piston selon la revendication 1, caractérisé en ce que l'ouverture supplémentaire, notamment la fente (6), est pratiqué sur la partie de base (1) après le montage de la section annulaire (3).
  4. Piston selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la section annulaire (3) peut être montée sur le composant (1) au moyen d'un procédé de soudage.
  5. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un joint de soudure (4) est disposé en affleurement avec la fente (6).
  6. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une saillie (5) orientée dans la direction de la partie de base (1) est disposée sur la section annulaire (3), laquelle forme avec la paroi de la partie de base (1) l'ouverture supplémentaire, notamment la fente (6) .
  7. Piston selon la revendication 6, caractérisé en ce que la partie de base (1) présente une saillie (8) formant la fente (6) conjointement avec la saillie (5).
EP20010117240 2000-08-18 2001-07-17 Piston en acier Expired - Lifetime EP1180592B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10040486 2000-08-18
DE2000140486 DE10040486C2 (de) 2000-08-18 2000-08-18 Stahlkolben

Publications (3)

Publication Number Publication Date
EP1180592A2 EP1180592A2 (fr) 2002-02-20
EP1180592A3 EP1180592A3 (fr) 2002-09-11
EP1180592B1 true EP1180592B1 (fr) 2006-03-15

Family

ID=7652919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010117240 Expired - Lifetime EP1180592B1 (fr) 2000-08-18 2001-07-17 Piston en acier

Country Status (2)

Country Link
EP (1) EP1180592B1 (fr)
DE (2) DE10040486C2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009041392A1 (de) 2009-09-12 2011-05-26 Daimler Ag Kolben für eine Verbrennungskraftmaschine
DE102010056220A1 (de) 2010-12-24 2012-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102010056218A1 (de) * 2010-12-24 2012-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102012014193A1 (de) * 2012-07-18 2014-05-15 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102013009164A1 (de) 2013-05-31 2014-12-04 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102013009161A1 (de) * 2013-05-31 2014-12-18 Mahle International Gmbh Kolben für einen Verbrennungsmotor
EP3164587B1 (fr) 2014-07-02 2020-04-22 KS Kolbenschmidt GmbH Géométrie de fente dans un piston de canal de refroidissement assemblé par liaison de matière
CN109312688A (zh) 2016-05-04 2019-02-05 Ks科尔本施密特有限公司 活塞

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD123962A1 (fr) * 1975-12-24 1977-01-26
DE3643039A1 (de) * 1986-12-17 1988-06-30 Mahle Gmbh Kuehlbarer tauchkolben fuer verbrennungsmotoren
DE19501416A1 (de) * 1995-01-19 1996-07-25 Kolbenschmidt Ag Geschmiedeter oder gegossener Kolbenkopf eines mehrteiligen Kolbens
DE19846152A1 (de) * 1998-10-07 2000-04-13 Mahle Gmbh Kolben mit Kolbengrundkörper aus geschmiedetem Stahl und einem Kühlkanal

Also Published As

Publication number Publication date
EP1180592A2 (fr) 2002-02-20
DE50109197D1 (de) 2006-05-11
DE10040486C2 (de) 2002-10-31
DE10040486A1 (de) 2002-03-07
EP1180592A3 (fr) 2002-09-11

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