EP0894966B1 - Piston pour un moteur à combustion interne - Google Patents

Piston pour un moteur à combustion interne Download PDF

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Publication number
EP0894966B1
EP0894966B1 EP98113574A EP98113574A EP0894966B1 EP 0894966 B1 EP0894966 B1 EP 0894966B1 EP 98113574 A EP98113574 A EP 98113574A EP 98113574 A EP98113574 A EP 98113574A EP 0894966 B1 EP0894966 B1 EP 0894966B1
Authority
EP
European Patent Office
Prior art keywords
piston
tubular cavity
recess
cooling
cooling oil
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
EP98113574A
Other languages
German (de)
English (en)
Other versions
EP0894966A3 (fr
EP0894966A2 (fr
Inventor
Volker Dürsch
Rudolf Tilgner
Peter Ottich
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.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7837410&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0894966(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH
Publication of EP0894966A2 publication Critical patent/EP0894966A2/fr
Publication of EP0894966A3 publication Critical patent/EP0894966A3/fr
Application granted granted Critical
Publication of EP0894966B1 publication Critical patent/EP0894966B1/fr
Anticipated expiration legal-status 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

Definitions

  • the invention relates to a piston for a Internal combustion engine according to the preamble of claim 1.
  • This has a cooling channel in the piston head, which is the Carrying out cooling oil and with at least one each Inflow and a discharge opening is provided.
  • a piston for an internal combustion engine according to the generic term of claim 1 is known from DE 1 930 302 A.
  • Cooling channel To the Inflow and outflow opening in the piston head Cooling channel is followed by a tubular cavity that is closed on all sides.
  • a similar piston is from, for example DE 24 25 881 A1 known.
  • This is usually the case annular cooling channel in the piston head, i.e. as close as possible to the face of the piston, and will ensure effective cooling with a cooling oil jet Coolant supplied.
  • the cooling oil jet is in the range of Sprayed crankcase from a suitable nozzle. at the known piston with cooling channel is therefore a certain one Distance between a cooling oil nozzle and the inlet opening of the Cooling channel before, so that a reliable filling of the Cooling channel with the cooling oil due to the large distance only is to be guaranteed with certain scatter losses.
  • the inlet opening is connected a funnel-shaped area formed on the side the piston skirt by an appropriately designed Inside of the adjacent wall section of the piston skirt is formed.
  • the funnel opens as in the previous ones described pistons in the area of the so-called piston crown and therefore at a considerable distance from onedeöleinspritzdüse. This arrangement also occurs consequently the required is not sufficiently reliable Amount of cooling oil in the cooling channel.
  • the object of the invention based on creating such a piston in which the Supply the required amount of cooling oil to the Cooling channel can be reliably guaranteed, and the nevertheless a largely symmetrical stiffness distribution of the piston skirt.
  • At least one opening of the Cooling channel in the direction outside the cooling channel tubular cavity provided.
  • cooling oil pipes can be tubular Cavity with the introduction of the cooling oil into the cooling channel achieve low wastage.
  • Limitation of the tubular cavity in a new way Way at least partially in the longitudinal direction of the tubular cavity provided recess. This is the usually in the area of Piston pin eye to form the tubular cavity necessary material thickening defused insofar as the required elasticity due to the mentioned recess of the piston skirt, which depends on the material thickening in the To a certain extent is decoupled from the vicinity of the cavity, is restored.
  • Cooling oil pipe available, through which the scattering losses when Injecting the cooling oil can be minimized. This is however, so slit that the in the state of the Problems known in the art with regard to pistons to an asymmetrical stiffness distribution of the Piston shaft are fixed.
  • the invention Recess in the area of the longitudinal extension of the tubular Cavity also has the advantage that this Recess provided that it is also provided at the cooling oil outflow the oil is used to lubricate the piston pin bearing can be. With the opening known in the prior art the cooling oil pipe in an area significantly below the This is not possible for the piston pin.
  • the piston crown is the inside of the piston lower limit of the piston head formed area understood, below which usually the Piston stem or individual stem wall sections, the Piston pin eye and the piston of the invention slotted, tubular cavity.
  • the cooling oil as a lubricating oil for the piston pin bearing, it is advantageous if both the inflow and the outflow opening of the cooling channel tubular cavity with a lengthwise extension the same extending recess connects. hereby can, as mentioned, the outflowing oil as a lubricating oil in Direction of the piston pin bearing.
  • the two on openings provided in the cooling channel are arranged in such a way that the resulting piston with respect to its (parallel to the Piston shaft extending) axis of rotation perfectly is point symmetric.
  • a piston with a cross section that is perpendicular to one another axis extending to the drawing plane in the center of the piston can be rotated through 180 ° such that the Cross-sectional representation remains the same.
  • the piston can be in any embodiment Orientation can be built in, because it is in every orientation a suitable opening to which a slotted, tubular cavity connects to the required Location is through which the cooling oil enters the cooling channel inject.
  • the other opening is therefore called Outflow opening used and can be used to supply lubricating oil can be used for the pin bearing.
  • Fig. 1 the piston 10 according to the invention is shown, the in the case shown on its end face with a Combustion chamber trough 12 is provided, and in the piston head, in the area of the height of the top land 14, a cooling duct 16 is trained.
  • the cooling channel is 16 largely ring-shaped, so that in the area of the cut in Fig. 1 shows the largely tubular cross section of the Cooling channel 16 can be seen.
  • a lower area of the Piston is on both sides of the piston pin eye 18 Recognize piston skirt 20.
  • Fig. 2 the piston according to the invention is approximately in cross section shown in the area of the piston pin axis.
  • a tubular cavity 26 available.
  • a considerable thickening of material, if the tubular cavity 26 is limited on all sides is so that a cooling oil pipe is formed.
  • the tubular cavity 26 must be approximately the same as that in FIG. 2 shown area are formed.
  • a clear Material thickening can be done in this zone.
  • piston shaft 20 for this side in contrast to the lower right area of the Piston shaft 20 has a significantly increased rigidity, so that asymmetrical strength properties and a along the circumference sets uneven compliance, so that the contact pattern of the shaft also becomes uneven.
  • FIG. 2 is a preferred embodiment of the Piston according to the invention shown, in which the inlet opening 32 a drain opening 34 is formed radially opposite is.
  • the drain opening 34 also has one according to the Representation of Fig. 2 perpendicular to the plane of the drawing extending tubular cavity 36 on the is provided according to the invention with a recess 38.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (6)

  1. Piston (10) pour un moteur à combustion interne, comprenant :
    au moins un canal de refroidissement (16) situé dans une tête dudit piston,
    et muni d'au moins un orifice respectif d'arrivée (32) et d'évacuation (34),
    sachant qu'une cavité tubulaire (26, 36), s'étendant dans une large mesure parallèlement à la tige (20) du piston, est prévue dans la continuité directe d'au moins un orifice (32, 34), en direction de l'extérieur du canal de refroidissement (16),
    caractérisé par le fait que la délimitation de la cavité tubulaire (26, 36) est pourvue, au moins en partie, d'une dépouille (24, 38) s'étendant dans la direction longitudinale de ladite cavité tubulaire (26, 36).
  2. Piston selon la revendication 1,
    caractérisé par le fait que
    la cavité tubulaire (26, 36) est ménagée, dans une large mesure, dans la région d'un oeillet (18) dudit piston.
  3. Piston selon la revendication 1 ou 2,
    caractérisé par le fait que
    la dépouille (24, 38) s'étend jusqu'à un bord de la cavité tubulaire (26, 36) inférieur dans une position d'intégration.
  4. Piston selon au moins l'une des revendications précédentes,
    caractérisé par le fait que
    la dépouille (24, 38) s'étend approximativement jusqu'à un fond dudit piston.
  5. Piston selon au moins l'une des revendications précédentes,
    caractérisé par le fait qu'une cavité tubulaire (26, 36), munie d'une dépouille (24, 38), se trouve dans la continuité directe tant de l'orifice d'arrivée (32), que de l'orifice d'évacuation (34).
  6. Piston selon la revendication 5,
    caractérisé par le fait que
    les deux orifices (32, 34) occupent des positions telles que la section transversale dudit piston (10) soit configurée avec symétrie ponctuelle.
EP98113574A 1997-07-30 1998-07-21 Piston pour un moteur à combustion interne Expired - Lifetime EP0894966B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732880A DE19732880C1 (de) 1997-07-30 1997-07-30 Kolben für einen Verbrennungsmotor
DE19732880 1997-07-30

Publications (3)

Publication Number Publication Date
EP0894966A2 EP0894966A2 (fr) 1999-02-03
EP0894966A3 EP0894966A3 (fr) 1999-12-01
EP0894966B1 true EP0894966B1 (fr) 2003-05-14

Family

ID=7837410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98113574A Expired - Lifetime EP0894966B1 (fr) 1997-07-30 1998-07-21 Piston pour un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP0894966B1 (fr)
DE (2) DE19732880C1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6327962B1 (en) * 1999-08-16 2001-12-11 Caterpillar Inc. One piece piston with supporting piston skirt
US6286414B1 (en) * 1999-08-16 2001-09-11 Caterpillar Inc. Compact one piece cooled piston and method
DE102005061059A1 (de) * 2005-12-21 2007-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH127857A (de) * 1927-04-01 1928-09-17 Otto Philipp Einrichtung zur Kühlung des Kolbens von Verbrennungskraftmaschinen.
DE1119601B (de) * 1957-01-15 1961-12-14 Karl Schmidt Ges Mit Beschraen Vorrichtung zum Kuehlen von Leichtmetallkolben fuer Brennkraftmaschinen
DE1930302A1 (de) * 1969-06-14 1970-12-17 Maschf Augsburg Nuernberg Ag Verfahren und Einrichtung zum Kuehlen eines Brennkraftmaschinenkolbens
DE2425881A1 (de) * 1974-05-28 1975-12-18 Kloeckner Humboldt Deutz Ag Kolben fuer hubkolben-brennkraftmaschinen
JPS56124650A (en) * 1980-03-06 1981-09-30 Mitsubishi Heavy Ind Ltd Piston for internal combustion engine
SU964204A1 (ru) * 1980-10-28 1982-10-07 Головное Специализированное Конструкторское Бюро По Двигателям Устройство дл охлаждени поршней двигател внутреннего сгорани
JPH06147004A (ja) * 1992-11-13 1994-05-27 Aisin Seiki Co Ltd 内燃機関用ピストン
DE19621894B4 (de) * 1995-06-08 2004-07-15 Deutz Ag Brennkraftmaschine mit Kolbenkühlung

Also Published As

Publication number Publication date
EP0894966A3 (fr) 1999-12-01
DE19732880C1 (de) 1999-01-21
DE59808328D1 (de) 2003-06-18
EP0894966A2 (fr) 1999-02-03

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