EP1922479B1 - Piston pour moteur a combustion interne - Google Patents

Piston pour moteur a combustion interne Download PDF

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Publication number
EP1922479B1
EP1922479B1 EP06776553.7A EP06776553A EP1922479B1 EP 1922479 B1 EP1922479 B1 EP 1922479B1 EP 06776553 A EP06776553 A EP 06776553A EP 1922479 B1 EP1922479 B1 EP 1922479B1
Authority
EP
European Patent Office
Prior art keywords
piston
region
insert
connecting walls
axis
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.)
Revoked
Application number
EP06776553.7A
Other languages
German (de)
English (en)
Other versions
EP1922479A1 (fr
Inventor
Ralf Buschbeck
Albert Haberl
Willi Sikorsky
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37076237&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1922479(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
Priority to PL06776553T priority Critical patent/PL1922479T3/pl
Publication of EP1922479A1 publication Critical patent/EP1922479A1/fr
Application granted granted Critical
Publication of EP1922479B1 publication Critical patent/EP1922479B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons
    • B22D19/0027—Cylinders, pistons 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 
    • F02F3/02—Pistons  having means for accommodating or controlling heat expansion
    • F02F3/04—Pistons  having means for accommodating or controlling heat expansion having expansion-controlling inserts
    • F02F3/08—Pistons  having means for accommodating or controlling heat expansion having expansion-controlling inserts the inserts being ring-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
    • 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 
    • 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 
    • F02F3/28—Other pistons with specially-shaped head
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/06—Casting

Definitions

  • the invention relates to a piston for an internal combustion engine according to the features of the respective preamble of the independent claims.
  • a piston for internal combustion engines is of the generic type EP 0 902 180 A2 known.
  • the hubs are reset in the bolt axis direction so that the outer hub clearance is 60 to 65% of the piston diameter or less.
  • the hub outer surfaces which connect the two sliding surfaces with each other, have a linear (linear) course over the height of the sliding surfaces.
  • the hub outer surfaces also called box walls
  • the hub outer surfaces are not basically flat, but also curved both in sections parallel and perpendicular to the piston axis.
  • the curvature of the surface in sections perpendicular to the piston axis is always the same for the whole surface of the box wall. This results in upward (in the direction of the piston head) decreasing distance of the box walls an upward decreasing width of the bearing sliding surface.
  • the disadvantage here is that with the width of the box walls widening upwards, the potential of weight saving due to the undercut of the ring field in the bolt direction can not be fully utilized.
  • the support of the piston crown is not optimal due to the box walls due to the lowering of the bottom tensile stresses. In the upward (in the direction of the piston crown) decreasing distance of the box walls is lost to the upper edge of the shaft surface, which is required for the Kolbengerad Entry and the production of seizure safety.
  • due to the lack of support of the ring field by the piston skirt high stresses in the transition areas arise between the piston skirt and the Ringfeldumguß.
  • connecting walls are known in pistons, which are formed as mutually parallel planes or curved surfaces with only one radius of curvature and only one direction of curvature.
  • Pistons are known in cylinder design, wherein in a piston crown a ring field is arranged and connects a piston stem cylindrically starting from the ring field.
  • piston head reinforcements are provided in each case in the region of the uppermost annular groove, which can accommodate the uppermost ring.
  • the invention is therefore based on the object to provide a piston with which the described disadvantages are avoided.
  • the invention is in various designs of the piston, concerning the course of the shaft wall sections and their connecting walls (the advantages in the DE 101 45 589 A1 are described), provided that in the region of the piston crown radially circumferential behind the ring field, a gain is provided.
  • This reinforcement has the advantage that it increases the piston crown area, in which the scree is located, in order to meet the loads resulting from the combustion temperatures and pressures during the operation of the piston in the cylinder chamber of an internal combustion engine. Since the clearance (undercut) is present in this area, this reinforcement is particularly advantageous and particularly important, especially as the shaft is freely suspended under the ring field and can not contribute to the reinforcement (support).
  • the reinforcement is formed as an insert that inserted before casting a piston blank into the casting tool, fixed there and surrounded with molten casting.
  • the insert is made of the same or different material than the material from which the piston blank is cast.
  • the insert is one or more parts, preferably one-piece annular, formed.
  • the multi-part design has the advantage that the insert can be arranged at the points behind the ring field and approximately at the height of the Freigusses, where a special reinforcement is to take place. It is particularly advantageous if the insert is integrally formed annular, so that it can be handled very easily when inserted into the casting tool. Moreover, this is one Particularly good continuous reinforcement, especially a radial support, given in the area of the ring field.
  • the insert before insertion into the casting tool has an outer diameter which is smaller than or equal to the inner diameter of the casting tool at the point at which the insert is fixed.
  • the inner diameter of the insert is greater than or equal to the outer diameter of the Freigusses.
  • the crop (undercut) is formed by a correspondingly shaped molding (slide) of the casting tool, which is pulled out vertically, obliquely or at right angles to the Kolbenhubachse after solidification of the casting melt depending on the shape of the Freigusses.
  • the insert according to the invention is designed so that it serves to reinforce the piston crown and after the production of the piston (pouring the piston blank, which is finished) appears on the radial surface of the piston in the region of the ring field.
  • the axial height of the insert is selected so that it extends above and below at least one annular groove, preferably the uppermost annular groove, or may extend over a plurality of annular grooves. It is possible that the insert already before casting has a groove for receiving an oil ring or this groove (ring groove) is introduced during the finishing of the piston blank.
  • the insert has a cooling channel forming one or more parts cooling channel plate, which is integrally formed on the insert.
  • FIG. 1 shows a piston 1, which is in particular a light metal piston, in particular for an internal combustion engine is.
  • This piston 1 has a piston skirt 2 and a cylindrically shaped piston crown 3, which is particularly adapted to the type of internal combustion engine (diesel or gasoline engine).
  • the piston head On the formation of the piston head, which may be arbitrary, it does not matter in this invention.
  • pin bosses 4 are present, which are set back in the direction of a pin axis to a piston axis and are part of the piston skirt 2.
  • the pin bosses 4 are located in two rear connection walls 5, which connect two opposite leg wall sections 7 together.
  • a ring field 6 is provided in the piston head 3.
  • the reference numeral 8 designates the lower edge of the connecting wall 5
  • the reference numeral 9 designates the lower edge of the piston crown 3 and the annular field 6, respectively.
  • the construction of the piston 1 is such that the curvature functions, their relative offset to each other in the bolt direction and the nature of their connection in the piston longitudinal direction is chosen so that surfaces of the shaft wall portions 7 with constant shaft width or 15 tapered upper or bottom shaft width result in the piston longitudinal direction ,
  • FIG. 2 shows to illustrate the invention, the view of the piston 1 from below, viewed in the interior of the piston 1 inside.
  • the connecting walls 5 have in their peripheral lower edge 8 a convex radius of curvature, relative to an axis 10 (perpendicular to the pin axis) (solid line).
  • the connecting walls 5 In the region of the lower edge 9 of the ring field 6, the connecting walls 5 have a concave radius of curvature with respect to the axis 10 (dashed line).
  • Reference numeral 11 designates a projection (ring-field projection) of the lower edge of the ring field 6 beyond the connecting walls 5, wherein this region is in particular at least partially hollowed out in order to realize a further weight saving.
  • This hollowing of the projection 11 can also extend into the regions in which the skirt wall sections 7 are arranged, and possibly extend into the inner region of the ring field 6, ie, until just before the end of the piston crown 3.
  • a reinforcement 15 which serves to reinforce the piston crown.
  • weight is saved by the combination of mortar 12 and reinforcement 15, but on the other hand increases the strength.
  • the weight which makes up the volume of the die 12
  • the weight of the reinforcement that is to say the one-piece or multi-part insert.
  • This can be achieved, for example, in that the material of the insert part has a lower specific density than that of the surrounding piston material. Alternatively or additionally, this effect can be achieved even with the same materials over different volumes (volume of the insert smaller than the volume of the Freigusses).

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

Claims (9)

  1. Piston (1), comprenant un fond de piston (3), un champ annulaire (6) ainsi qu'une tige de piston (2) constituée de sections de paroi de tige porteuses (7) et de parois de liaison (5) en retrait qui relient les unes aux autres les sections de paroi de tige (7) et, dans la direction d'un axe de boulon, des moyeux de boulon (4) en retrait par rapport à un axe du piston, qui traversent les parois de liaison (5), les parois de liaison (5), dans la région de leur bord inférieur périphérique (8) étant réalisées de manière convexe par rapport à un axe (10) et dans la région de leur bord supérieur (9), étant réalisées de préférence en dessous du champ annulaire (6) de manière concave par rapport à l'axe (10), le bord inférieur (8) du champ annulaire (6), dans la région des parois de liaison (5), faisant saillie au-dessus de celui-ci et présentant une projection (11) et étant au moins en partie évidé à cet endroit, caractérisé en ce que dans la région du fond de piston (3) est prévu un renforcement (15) situé radialement sur la périphérie derrière le champ annulaire (6) au-dessus de la projection (11).
  2. Piston (1) comprenant un fond de piston (3), un champ annulaire (6) ainsi qu'une tige de piston (2) constituée de sections de paroi de tige porteuses (7) et de parois de liaison (5) en retrait qui relient les unes aux autres les sections de paroi de tige (7) et, dans la direction d'un axe de boulon, des moyeux de boulon (4) en retrait par rapport à un axe du piston, qui traversent les parois de liaison (5), les parois de liaison (5), dans la région de leur bord inférieur périphérique (8) étant réalisées de manière convexe par rapport à un axe (10) et dans la région de leur bord supérieur (9), étant réalisées de préférence en dessous du champ annulaire (6) de manière droite, le bord inférieur (8) du champ annulaire (6), dans la région des parois de liaison (5), faisant saillie au-dessus de celui-ci et présentant une projection (11) et étant au moins en partie évidé à cet endroit, caractérisé en ce que dans la région du fond de piston (3) est prévu un renforcement (15) situé radialement sur la périphérie derrière le champ annulaire (6) au-dessus de la projection (11).
  3. Piston (1) comprenant un fond de piston (3), un champ annulaire (6) ainsi qu'une tige de piston (2) constituée de sections de paroi de tige porteuses (7) et de parois de liaison (5) en retrait qui relient les unes aux autres les sections de paroi de tige (7) et, dans la direction d'un axe de boulon, des moyeux de boulon (4) en retrait par rapport à un axe du piston, qui traversent les parois de liaison (5), les parois de liaison (5), dans la région de leur bord inférieur périphérique (8) étant réalisées de manière droite et dans la région de leur bord supérieur (9), étant réalisées de préférence en dessous du champ annulaire (6) de manière concave par rapport à l'axe (10), le bord inférieur (8) du champ annulaire (6), dans la région des parois de liaison (5), faisant saillie au-dessus de celui-ci et présentant une projection (11) et étant au moins en partie évidé à cet endroit, caractérisé en ce que dans la région du fond de piston (3) est prévu un renforcement (15) situé radialement sur la périphérie derrière le champ annulaire (6) au-dessus de la projection (11).
  4. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une coulée libre est réalisée derrière les rainures annulaires dans la surface de la projection (11).
  5. Piston (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le renforcement (15) est réalisé sous forme de pièce d'insertion qui est insérée avant la coulée d'une préforme de piston dans l'outil de coulée, qui est fixée dans celui-ci et qui est entourée par la masse de coulée en fusion.
  6. Piston (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie d'insertion est réalisée en une ou plusieurs parties, de préférence sous forme annulaire en une partie.
  7. Piston (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie d'insertion, avant l'insertion dans l'outil de coulée, présente un diamètre extérieur qui est inférieur ou égal au diamètre intérieur de l'outil de coulée à l'endroit où la pièce d'insertion est fixée et le diamètre intérieur de la pièce d'insertion est supérieur ou égal au diamètre extérieur de la coulée libre (12).
  8. Piston (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce d'insertion apparaît au niveau de la surface radiale du piston (1), dans la région du champ annulaire (6), et la hauteur axiale de la pièce d'insertion est choisie de telle sorte qu'elle s'étende au-dessus et en dessous d'au moins une rainure annulaire, de préférence la rainure annulaire supérieure (16).
  9. Piston (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce d'insertion présente une tôle de canal de refroidissement en une ou plusieurs parties formant un canal de refroidissement, laquelle est façonnée sur la pièce d'insertion.
EP06776553.7A 2005-09-08 2006-08-02 Piston pour moteur a combustion interne Revoked EP1922479B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06776553T PL1922479T3 (pl) 2005-09-08 2006-08-02 Tłok do silnika spalinowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005042857A DE102005042857A1 (de) 2005-09-08 2005-09-08 Kolben für eine Brennkraftmaschine
PCT/EP2006/007638 WO2007028466A1 (fr) 2005-09-08 2006-08-02 Piston pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1922479A1 EP1922479A1 (fr) 2008-05-21
EP1922479B1 true EP1922479B1 (fr) 2016-07-13

Family

ID=37076237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06776553.7A Revoked EP1922479B1 (fr) 2005-09-08 2006-08-02 Piston pour moteur a combustion interne

Country Status (7)

Country Link
US (1) US8683913B2 (fr)
EP (1) EP1922479B1 (fr)
JP (1) JP2009507173A (fr)
KR (1) KR20080068805A (fr)
DE (1) DE102005042857A1 (fr)
PL (1) PL1922479T3 (fr)
WO (1) WO2007028466A1 (fr)

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US9238283B2 (en) * 2008-07-24 2016-01-19 Ks Kolbenschmidt Gmbh Friction welded steel piston having optimized cooling channel
DE102008055848A1 (de) 2008-11-04 2010-05-06 Ks Kolbenschmidt Gmbh Kühlkanalkolben einer Brennkraftmaschine mit einem Verschlusselement, das den Kühlkanal verschließt
US9010296B2 (en) 2010-06-29 2015-04-21 Kolbenschmidt K. K. Piston for spark-ignition engine
GB2492101B (en) * 2011-06-21 2014-12-10 Jaguar Land Rover Ltd Apparatus and method for embedding an element
DE102011115639A1 (de) 2011-09-28 2013-03-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102011115048A1 (de) * 2011-10-07 2013-04-11 Mahle International Gmbh Schmiedevorrichtung zur Herstellung eines Kolbenrohlings und Verfahren zur Herstellung des Kolbenrohlings unter Verwendung der Schmiedevorrichtung
CN104246192B (zh) 2012-03-12 2017-02-15 费德罗-莫格尔公司 发动机活塞
US8969197B2 (en) * 2012-05-18 2015-03-03 International Business Machines Corporation Copper interconnect structure and its formation
WO2015055578A1 (fr) * 2013-10-14 2015-04-23 Ks Kolbenschmidt Gmbh Piston pour moteur à combustion interne et son procédé de fabrication
JP6147289B2 (ja) * 2015-04-08 2017-06-14 三菱電機株式会社 自動二輪車の吸入空気量推定装置
DE102015220261A1 (de) * 2015-10-19 2017-04-20 Mahle International Gmbh Kolben
US10294887B2 (en) 2015-11-18 2019-05-21 Tenneco Inc. Piston providing for reduced heat loss using cooling media
US10648425B2 (en) 2017-08-23 2020-05-12 Tenneco Inc. Piston with broad ovate gallery
USD897373S1 (en) * 2018-09-22 2020-09-29 Chaoming Li Piston
US11371609B2 (en) * 2018-10-26 2022-06-28 Ted Hollinger Systems, devices, and/or methods for improving engine efficiency
USD880529S1 (en) * 2019-06-06 2020-04-07 Chenggang Liu Piston

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE901104C (de) 1949-11-10 1954-01-07 Fairchild Engine And Airplane Verbundgussstueck und Verfahren zu dessen Herstellung
US2685729A (en) 1951-05-10 1954-08-10 Frank A Bower Method of making composite piston structures
DE2026272C3 (de) 1970-05-29 1975-03-27 Maschinenfabrik Augsburg-Nuernberg Ag, Zweigniederl. Nuernberg, 8500 Nuernberg Kolben für Brennkraftmaschinen
DE2027649A1 (de) 1970-06-05 1971-12-09 Karl Schmidt Gmbh, 7107 Neckarsulm Leichtmetallkolben für Verbrennungskraftmaschinen
JPS60166158A (ja) 1984-02-07 1985-08-29 Izumi Jidosha Kogyo Kk 内燃機関用ピストンの製造方法
EP0240308B1 (fr) 1986-04-01 1991-12-04 Izumi Automotive Industry Company Limited Piston pour moteur à combustion interne et méthode pour le renforcer
DE69202873T2 (de) 1991-02-02 1995-11-23 Ae Piston Products Kolben.
DE4328619C2 (de) 1993-08-26 1995-08-10 Peak Werkstoff Gmbh Partiell verstärktes Al-Gußbauteil und Verfahren zu dessen Herstellung
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PL1922479T3 (pl) 2017-05-31
DE102005042857A1 (de) 2007-03-22
US8683913B2 (en) 2014-04-01
EP1922479A1 (fr) 2008-05-21
JP2009507173A (ja) 2009-02-19
WO2007028466A1 (fr) 2007-03-15
KR20080068805A (ko) 2008-07-24
US20080245229A1 (en) 2008-10-09

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