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WO2007031067A1 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine Download PDF

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Publication number
WO2007031067A1
WO2007031067A1 PCT/DE2006/001610 DE2006001610W WO2007031067A1 WO 2007031067 A1 WO2007031067 A1 WO 2007031067A1 DE 2006001610 W DE2006001610 W DE 2006001610W WO 2007031067 A1 WO2007031067 A1 WO 2007031067A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
ring element
combustion engine
internal combustion
ring
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.)
Ceased
Application number
PCT/DE2006/001610
Other languages
German (de)
French (fr)
Inventor
Hans-Peter Wieland
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.)
Mahle International GmbH
Original Assignee
Mahle International 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 Mahle International GmbH filed Critical Mahle International GmbH
Publication of WO2007031067A1 publication Critical patent/WO2007031067A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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 for an internal combustion engine according to the preamble of claim.
  • a piston for an internal combustion engine which consists of a piston main body and of a ring element which forms the radially outer region of the piston crown, the top land and the ring portion of the piston.
  • the ring element is fastened exclusively via a thread arranged on the radially outer end face of the piston crown, while the piston bottom facing away from the end face of the ring member is supported on an elastically resilient projection which is attached to the piston body.
  • the figure shows a piston 1 for an internal combustion engine in a sectional view, which consists of two halves, of which the left half of a section of the piston. 1 - -
  • the piston 1 consists of a piston body 4, to which a piston element side, first screw 5 and a second screw 19 in the region of the surface 25 of a piston crown side integrally formed on the piston body 4, circumferential projection 15, a ring member 6 is connected to the top land 7 and the ring part 8 of the piston 1 forms.
  • the piston body 4 and the ring member 6 are made of steel.
  • the projection 15 is plate spring-like and tapered in the direction of the piston body 4.
  • the second screw 19 consists of an external thread 22, which is located on the radial outer side of an annular, attached to the piston bottom end of the projection 15 Anformung 23, and an internal thread 24, which is located near the lower end face 21 of the ring member 6 on the Inside is located.
  • the piston main body 4 is formed in one piece and has a combustion bowl 10 in the region of the piston head 9.
  • a respective hub support 11, 11 ' two pin bosses 12, 12', each with a hub bore 3, 3 ', are formed on the piston head 9 whose end faces 16 are set back relative to the ring element 6 in the direction of the piston longitudinal axis 17.
  • the pin bosses 12, 12 ' are connected to each other via shaft elements 13, 13'.
  • the piston body 4 recesses 18 which are arranged in the present embodiment in the region of the shaft elements 13, 13' of the piston body 4 partially circulating.
  • a carrier of the ring member 6 and a piston body 4 may be used, in which the end faces 16 of the pin bosses 12, 12 'are arranged not reset relative to the ring section 8.
  • the recess 18 over the entire circumference of the piston between the shaft elements 13, 13 'and the ring member 6 and partly between the pin bosses 12, 12' and the ring member 6 is arranged circumferentially.
  • the piston body 4 forms in the region of the piston head 9 together with the ring member 6 an annular cooling channel 14, which is partly incorporated in the piston body 4 and partly in the ring member 6. In the direction of pin boss 12, the cooling channel 14 is covered by the projection 15 of the piston main body 4.
  • the piston 1 may have a plurality of drain holes 20 for cooling oil.
  • annular spring element may be arranged, whose function is to produce a bias voltage which improves the strength of the screw connection.

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)

Abstract

The invention relates to a piston (1) for an internal combustion engine, consisting of a main piston body (4) and a ring element (6), which is connected to the main piston body (4) via a first screw connection (5) at the base of the piston and, in order to improve the strength of the connection between the main piston body (4) and the ring element (6), via a second screw connection (19) in the region of the ring element (6) that is remote from the base of the piston. The ring element (6) together with the main piston body (4) forms an annular cooling channel (14).

Description

Kolben für einen Verbrennungsmotor Piston for an internal combustion engine

Die Erfindung betrifft einen Kolben für einen Verbrennungsmotor nach dem Oberbegriff des Patentanspruches.The invention relates to a piston for an internal combustion engine according to the preamble of claim.

Aus der Offenlegungsschrift DE 103 25 914 A1 ist ein Kolben für einen Verbrennungsmotor bekannt, der aus einem Kolbengrundkörper und aus einem Ringelement besteht, das den radial äußeren Bereich des Kolbenbodens, den Feuersteg und die Ringpartie des Kolbens bildet. An dem Kolben ist das Ringelement ausschließlich über ein an der radial äußeren Stirnseite des Kolbenbodens angeordnetes Gewinde befestigt, während sich die kolbenbodenabgewandte Stirnseite des Ringelementes auf einem elastisch nachgiebigen Vorsprung abstützt, der am Kolbengrundkörper angebracht ist.From the published patent application DE 103 25 914 A1 a piston for an internal combustion engine is known, which consists of a piston main body and of a ring element which forms the radially outer region of the piston crown, the top land and the ring portion of the piston. On the piston, the ring element is fastened exclusively via a thread arranged on the radially outer end face of the piston crown, while the piston bottom facing away from the end face of the ring member is supported on an elastically resilient projection which is attached to the piston body.

Nachteilig ist hierbei, dass bei größeren Druckbelastungen des Kolbens die Schraubverbindung zwischen dem Kolbengrundkörper und dem Ringelement keine ausreichende Festigkeit bietet.The disadvantage here is that with larger pressure loads of the piston, the screw connection between the piston body and the ring member does not provide sufficient strength.

Diesen Nachteil zu vermeiden, ist Aufgabe der Erfindung. Gelöst wird die Aufgabe mit den im Kennzeichen des Patentanspruches stehenden Merkmalen.To avoid this disadvantage is the object of the invention. The problem is solved with the standing in the characterizing part of claim characteristics.

Die Erfindung wird im Folgenden anhand der Zeichnung beschrieben. Sie zeigt ein aus zwei Halbschnitten bestehendes Schnittbild eines Kolbens für einen Verbrennungsmotor.The invention will be described below with reference to the drawing. It shows a two-section cross-sectional view of a piston for an internal combustion engine.

Die Figur zeigt einen Kolben 1 für einen Verbrennungsmotor in einem Schnittbild, das aus zwei Hälften besteht, von denen die linke Hälfte einen Schnitt des Kolbens 1 - -The figure shows a piston 1 for an internal combustion engine in a sectional view, which consists of two halves, of which the left half of a section of the piston. 1 - -

entlang einer Längsachse 2 einer Nabenbohrung 3 und die rechte Hälfte einen um 90° dazu versetzten Längsschnitt des Kolbens 1 darstellen. Der Kolben 1 besteht aus einem Kolbengrundkörper 4, mit dem über eine kolbenbodenseitige, erste Schraubverbindung 5 und über eine zweite Schraubverbindung 19 im Bereich der Oberfläche 25 eines kolbenbodenseitig am Kolbengrundkörper 4 angeformten, umlaufenden Vorsprunges 15 ein Ringelement 6 verbunden ist, das den Feuersteg 7 und die Ringpartie 8 des Kolbens 1 bildet. Der Kolbengrundkörper 4 und das Ringelement 6 sind aus Stahl hergestellt.along a longitudinal axis 2 of a hub bore 3 and the right half represent a 90 ° offset to longitudinal section of the piston 1. The piston 1 consists of a piston body 4, to which a piston element side, first screw 5 and a second screw 19 in the region of the surface 25 of a piston crown side integrally formed on the piston body 4, circumferential projection 15, a ring member 6 is connected to the top land 7 and the ring part 8 of the piston 1 forms. The piston body 4 and the ring member 6 are made of steel.

Der Vorsprung 15 ist tellerfederartig und in Richtung Kolbengrundkörper 4 konisch zulaufend ausgebildet. Die zweite Schraubverbindung 19 besteht aus einem Außengewinde 22, das sich auf der radialen Außenseite einer ringförmigen, am kolben- bodenseitigen Ende des Vorsprunges 15 angebrachten Anformung 23 befindet, und aus einem Innengewinde 24, das sich nahe der unteren Stirnseite 21 des Ringelementes 6 auf dessen Innenseite befindet.The projection 15 is plate spring-like and tapered in the direction of the piston body 4. The second screw 19 consists of an external thread 22, which is located on the radial outer side of an annular, attached to the piston bottom end of the projection 15 Anformung 23, and an internal thread 24, which is located near the lower end face 21 of the ring member 6 on the Inside is located.

Der Kolbengrundkörper 4 ist einstückig ausgebildet und weist im Bereich des Kolbenbodens 9 eine Verbrennungsmulde 10 auf. Über je eine Nabenabstützung 11 , 1 1 ' sind an den Kolbenboden 9 zwei Bolzennaben 12, 12' mit je einer Nabenbohrung 3, 3' angeformt, deren Stirnflächen 16 gegenüber dem Ringelement 6 in Richtung Kolbenlängsachse 17 zurückgesetzt sind. Die Bolzennaben 12, 12' sind über Schaftelemente 13, 13' miteinander verbunden. Zwischen den Schaftelementen 13, 13' und dem das Ringelement 6 tragenden, oberen Bereich des Kolbens 1 weist der Kolbengrundkörper 4 Ausnehmungen 18 auf, die im vorliegenden Ausführungsbeispiel im Bereich der Schaftelemente 13, 13' des Kolbengrundkörpers 4 teilweise umlaufend angeordnet sind. Als Träger des Ringelementes 6 kann auch ein Kolbengrundkörper 4 verwendet werden, bei dem die Stirnflächen 16 der Bolzennaben 12, 12' gegenüber der Ringpartie 8 nicht zurückgesetzt angeordnet sind. Hierbei ist die Ausnehmung 18 über den gesamten Umfang des Kolbens teils zwischen den Schaftelementen 13, 13' und dem Ringelement 6 und teils zwischen den Bolzennaben 12, 12' und dem Ringelement 6 umlaufend angeordnet.The piston main body 4 is formed in one piece and has a combustion bowl 10 in the region of the piston head 9. By way of a respective hub support 11, 11 ', two pin bosses 12, 12', each with a hub bore 3, 3 ', are formed on the piston head 9 whose end faces 16 are set back relative to the ring element 6 in the direction of the piston longitudinal axis 17. The pin bosses 12, 12 'are connected to each other via shaft elements 13, 13'. Between the shaft elements 13, 13 'and the annular element 6 bearing, upper portion of the piston 1, the piston body 4 recesses 18 which are arranged in the present embodiment in the region of the shaft elements 13, 13' of the piston body 4 partially circulating. As a carrier of the ring member 6 and a piston body 4 may be used, in which the end faces 16 of the pin bosses 12, 12 'are arranged not reset relative to the ring section 8. Here, the recess 18 over the entire circumference of the piston between the shaft elements 13, 13 'and the ring member 6 and partly between the pin bosses 12, 12' and the ring member 6 is arranged circumferentially.

V55049 Der Kolbengrundkörper 4 bildet im Bereich des Kolbenbodens 9 gemeinsam mit dem Ringelement 6 einen ringförmigen Kühlkanal 14, der teils in den Kolbengrundkörper 4 und teils in das Ringelement 6 eingearbeitet ist. In Richtung Bolzennabe 12 wird der Kühlkanal 14 von dem Vorsprung 15 des Kolbengrundkörpers 4 abgedeckt. Über eine in der Figur nicht dargestellte, mindestens eine Zulauföffnung gelangt Kühlöl in den Kühlkanal 14. Zu erkennen ist in der Figur eine Ablauföffnung 20 des Kühlkanals 14. Der Kolben 1 kann mehrere Ablauföffnungen 20 für Kühlöl aufweisen.V55049 The piston body 4 forms in the region of the piston head 9 together with the ring member 6 an annular cooling channel 14, which is partly incorporated in the piston body 4 and partly in the ring member 6. In the direction of pin boss 12, the cooling channel 14 is covered by the projection 15 of the piston main body 4. A not shown in the figure, at least one inlet opening cooling oil passes into the cooling channel 14 can be seen in the figure, a drain opening 20 of the cooling channel 14. The piston 1 may have a plurality of drain holes 20 for cooling oil.

Zudem kann zwischen dem Ringelement 6 und dem Vorsprung 15 ein ringförmiges Federelement angeordnet sein, dessen Funktion darin besteht, eine Vorspannung zu erzeugen, die die Festigkeit der Schraubverbindung verbessert.In addition, between the ring member 6 and the projection 15, an annular spring element may be arranged, whose function is to produce a bias voltage which improves the strength of the screw connection.

V55049 BezugszeichenlisteV55049 LIST OF REFERENCE NUMBERS

1 Kolben1 piston

2 Längsachse der Nabenbohrungen2 longitudinal axis of the hub bores

3 Nabenbohrung3 hub bore

4 Kolbengrundkörper4 piston main body

5 erste Schraubverbindung5 first screw connection

6 Ringelement6 ring element

7 Feuersteg7 lancet

8 Ringpartie8 ring game

9 Kolbenboden9 piston bottom

10 Verbrennungsmulde10 combustion bowl

11 , 11 ' Nabenabstützungen11, 11 'hub supports

12, 12' Bolzennaben12, 12 'pin hubs

13, 13' Schaftelement .13, 13 'shaft element.

14 Kϋhlkanal14 cooling channel

15 Vorsprung15 advantage

16 Stirnfläche16 face

17 Kolbenlängsachse17 piston longitudinal axis

18 Ausnehmung18 recess

19 zweite Schraubverbindung19 second screw connection

20 Ablauföffnung20 drain opening

21 untere Stirnfläche des Ringelementes 621 lower end face of the ring element. 6

22 Außengewinde22 external thread

23 Anformung23 Forming

24 Innengewinde24 internal thread

25 Oberfläche des Vorsprunges 1525 surface of the projection 15th

V55049 V55049

Claims

_- -Patentanspruch _- patent claim 1. Kolben (1 ) für einen Verbrennungsmotor1. piston (1) for an internal combustion engine - mit einem Kolbengrundkörper (4), der zwei über je eine Nabenabstützung (11 , 11 ') mit dem Kolbenboden (9) verbundene Bolzennaben (12, 12') aufweist, die über zwei am Kolbenboden (9) angeformte Schaftelemente (13, 13') miteinander verbunden sind, und- having a piston base body (4), the two via a respective hub support (11, 11 ') with the piston head (9) connected pin bosses (12, 12') which via two on the piston head (9) integrally formed shaft elements (13, 13 ') are interconnected, and - mit einem Ringelement (6), das mit dem Kolbengrundkörper (4) über eine kolbenbodenseitige, erste Schraubverbindung (5) verbunden ist, und das den radial außen liegenden Teil des Kolbenbodens (9), den Feuersteg (7), die Ringpartie (8) und mit dem Kolbengrundkörper (4) einen ringförmigen Kühlkanal (14) bildet, dadurch gekennzeichnet,- With a ring element (6) which is connected to the piston base body (4) via a piston bottom side, first screw connection (5), and the radially outer part of the piston head (9), the top land (7), the ring portion (8 ) and with the piston main body (4) forms an annular cooling channel (14), characterized - dass das Ringelement (6) mit dem Kolbengrundkörper (4) über eine im kolbenbodenabgewandten Bereich des Ringelementes (6) angeordnete, zweite Schraubverbindung (19) verbunden ist.- That the ring element (6) with the piston main body (4) via a piston bottom facing away from the region of the ring element (6) arranged, second screw (19) is connected. V55049 V55049
PCT/DE2006/001610 2005-09-17 2006-09-14 Piston for an internal combustion engine Ceased WO2007031067A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510044597 DE102005044597A1 (en) 2005-09-17 2005-09-17 Piston for an internal combustion engine
DE102005044597.7 2005-09-17

Publications (1)

Publication Number Publication Date
WO2007031067A1 true WO2007031067A1 (en) 2007-03-22

Family

ID=37649428

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2006/001610 Ceased WO2007031067A1 (en) 2005-09-17 2006-09-14 Piston for an internal combustion engine

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DE (1) DE102005044597A1 (en)
WO (1) WO2007031067A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008151620A1 (en) 2007-06-13 2008-12-18 Mahle International Gmbh Two-part piston for an internal combustion engine
WO2009016089A1 (en) * 2007-08-02 2009-02-05 Mahle International Gmbh Assembled piston

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008038325A1 (en) 2007-12-20 2009-06-25 Mahle International Gmbh Method for attaching a ring element on a piston for an internal combustion engine
DE102012014193A1 (en) * 2012-07-18 2014-05-15 Mahle International Gmbh Piston for an internal combustion engine
DE102012014188A1 (en) * 2012-07-18 2014-01-23 Mahle International Gmbh Piston for an internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049174B (en) * 1956-10-25 1959-01-22 Mahle Kg Oil-cooled pistons, especially for internal combustion engines
DD123962A1 (en) * 1975-12-24 1977-01-26
US6003479A (en) * 1997-05-12 1999-12-21 Evans; Mark M. Piston construction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2914456A1 (en) * 1979-04-10 1980-10-23 Schmidt Gmbh Karl BUILT PISTON FOR INTERNAL COMBUSTION ENGINES
DE2916441A1 (en) * 1979-04-24 1980-11-06 Schmidt Gmbh Karl PISTON WITH RING CARRIER
DE10325914B4 (en) * 2003-06-07 2012-08-02 Mahle Gmbh Piston for an internal combustion engine
DE10340292A1 (en) * 2003-09-02 2005-04-14 Mahle Gmbh Piston for an internal combustion engine
DE10340291A1 (en) * 2003-09-02 2005-04-14 Mahle Gmbh Piston for an internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049174B (en) * 1956-10-25 1959-01-22 Mahle Kg Oil-cooled pistons, especially for internal combustion engines
DD123962A1 (en) * 1975-12-24 1977-01-26
US6003479A (en) * 1997-05-12 1999-12-21 Evans; Mark M. Piston construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008151620A1 (en) 2007-06-13 2008-12-18 Mahle International Gmbh Two-part piston for an internal combustion engine
WO2009016089A1 (en) * 2007-08-02 2009-02-05 Mahle International Gmbh Assembled piston

Also Published As

Publication number Publication date
DE102005044597A1 (en) 2007-03-29

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