EP1278951B1 - Combustion engine with a built-up piston - Google Patents

Combustion engine with a built-up piston Download PDF

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Publication number
EP1278951B1
EP1278951B1 EP01940141A EP01940141A EP1278951B1 EP 1278951 B1 EP1278951 B1 EP 1278951B1 EP 01940141 A EP01940141 A EP 01940141A EP 01940141 A EP01940141 A EP 01940141A EP 1278951 B1 EP1278951 B1 EP 1278951B1
Authority
EP
European Patent Office
Prior art keywords
piston
combustion engine
screw
sliding block
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
EP01940141A
Other languages
German (de)
French (fr)
Other versions
EP1278951A1 (en
Inventor
Dieter Messmer
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 GmbH
Original Assignee
Mahle 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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Publication of EP1278951A1 publication Critical patent/EP1278951A1/en
Application granted granted Critical
Publication of EP1278951B1 publication Critical patent/EP1278951B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 
    • 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
    • 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

Definitions

  • the invention relates to an internal combustion engine with a built-piston consisting of a piston crown made of steel and a piston lower part, which are connected to each other via a single, arranged in the central axis or near the central axis of the piston screw, and with a central cooling space between the piston crown and piston lower part, further with an oil-carrying connecting rod, which is connected by a piston pin with the piston lower part.
  • a piston for a generic internal combustion engine is known from DE 4131275.
  • the cooling oil is introduced via the piston pin in the hubs and from there by vertically extending holes upwards in an outer cooling channel flows radially inward into a central cooling chamber and over a drain in the inner shape of the piston.
  • the invention is therefore concerned with the problem of optimizing the flow of the cooling oil through the piston in generic internal combustion engines and to simplify the bolt by the non-integrated oil guide and to optimize strength.
  • a built piston 2 is slidably disposed in an internal combustion engine 1 - indicated by a cylinder wall of a motor housing - .
  • the built piston 2 consists of a piston head 3 and a piston lower part 4, which are connected to each other via a screw 5 arranged in the piston longitudinal axis.
  • a cooling channel 6 and a central cooling chamber 7, are each bounded by the piston head and piston lower part and which are connected to each other via overflow 8.
  • the piston 2 is connected via a piston pin 9 with a connecting rod 10 leading to cooling oil.
  • a sliding shoe 12 is arranged in a spring-biased manner on the screw head.
  • the shoe 12 has a fitting surface 13, which cooperates with a machined surface 14 on the connecting rod 10, whereby cooling oil losses between the connecting rod 10 and shoe 12 are largely prevented.
  • a locking ring 15 in the screw head 11 serves as a transport lock against loss of the shoe 12.
  • the screw head 11 is supported by a contact surface 16 against a collar 17 in the lower part.
  • the screw 5 has a bore 18 along the longitudinal axis and radially extending overflow holes 19 to the central cooling chamber 7.
  • the spring 23 is supported against an integrally formed on the screw head collar and pushes the slider 12 against the connecting rod 10th
  • FIG. 2 shows deviations from FIG. 1 with regard to the guidance of the cooling oil and the introduction of the screwing forces into the collar 17.
  • the screwing forces are introduced into the collar 17 via a spacer 20 and a guide part 21.
  • the cooling oil flows from the shoe 12 through radial holes 22 in the space between spacer 12 and screw 5 and from there up into the central cooling chamber 7.
  • the shoe 12 is slidably mounted in the guide member 21 against the force of a spring 23.
  • the spring 23 is supported against a collar arranged on the spacer.
  • the guide member 21 is fixed when tightening the screw 5 between the spacer 20 and the collar 17.

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)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

Die Erfindung betrifft einen Verbrennungsmotor mit einem gebauten Kolben bestehend aus einem Kolbenboden aus Stahl und einem Kolbenunterteil, die über eine einzige, in der Mittelachse oder nahe der Mittelachse des Kolbens angeordnete Schraube miteinander verbunden sind, und mit einem zentralen Kühlraum zwischen Kolbenboden und Kolbenunterteil, ferner mit einem ölführenden Pleuel, das durch einen Kolbenbolzen mit dem Kolbenunterteil verbunden ist.The invention relates to an internal combustion engine with a built-piston consisting of a piston crown made of steel and a piston lower part, which are connected to each other via a single, arranged in the central axis or near the central axis of the piston screw, and with a central cooling space between the piston crown and piston lower part, further with an oil-carrying connecting rod, which is connected by a piston pin with the piston lower part.

Ein Kolben für einen gattungsgemäßen Verbrennungsmotor ist bekannt aus der DE 4131275. Bei diesem Kolben wird das Kühlöl über den Kolbenbolzen in die Naben und von dort durch vertikal verlaufende Bohrungen nach oben in einen äußeren Kühlkanal eingeleitet, fließt nach radial innen in einen zentralen Kühlraum und über einen Ablauf in die Innenform des Kolbens.A piston for a generic internal combustion engine is known from DE 4131275. In this piston, the cooling oil is introduced via the piston pin in the hubs and from there by vertically extending holes upwards in an outer cooling channel flows radially inward into a central cooling chamber and over a drain in the inner shape of the piston.

Durch die Umlenkung des Öls im Kolbenbolzen und durch die langen Bohrungen ergibt sich ein relativ hoher Strömungswiderstand. Die Erfindung beschäftigt sich daher mit dem Problem, bei gattungsgemäßen Verbrennungsmotoren den Durchfluß des Kühlöls durch den Kolben zu optimieren und den Bolzen durch die nicht integrierte Ölführung zu vereinfachen bzw. festigkeitsmäßig zu optimieren.Due to the deflection of the oil in the piston pin and the long holes results in a relatively high flow resistance. The invention is therefore concerned with the problem of optimizing the flow of the cooling oil through the piston in generic internal combustion engines and to simplify the bolt by the non-integrated oil guide and to optimize strength.

Dieses Problem wird gelöst durch das kennzeichnende Merkmal des Anspruchs 1. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche. Gleitschuhe zur Ölzuführung in einen zentralen Kühlraum sind an sich bekannt, z. B. aus der DE 3518721, Fig. 3. Eine Kombination von Zentralverschraubung und Gleitschuh wurde jedoch bisher - obwohl beide Merkmale für sich seit längerem bekannt sind - nicht vorgeschlagen, da beide Merkmale generell am selben Ort angeordnet sind, d. h. in der Mittelachse des Kolbens im Bereich der Innenform und die gleichzeitige Verwirklichung beider Merkmale aus Platzgründen kaum realisierbar erschien.This problem is solved by the characterizing feature of claim 1. Advantageous developments are the subject the dependent claims. Sliding shoes for oil supply in a central cooling chamber are known per se, for. However, a combination of Zentralverschraubung and shoe was previously - although both features are known for a long time - not proposed because both features are generally located at the same location, ie in the center axis of the piston In the area of the inner shape and the simultaneous realization of both features for space reasons hardly feasible appeared.

Durch die aufgezeigten Lösungen wird eine Integration beider Merkmale gelehrt.The presented solutions teach integration of both features.

Die Erfindung wird im folgenden anhand einer Zeichnung näher erläutert. Es zeigt:

Fig. 1
ein erstes Ausführungsbeispiel im Querschnitt
Fig. 2
ein zweites Ausführungsbeispiel im Querschnitt.
The invention will be explained in more detail below with reference to a drawing. It shows:
Fig. 1
a first embodiment in cross section
Fig. 2
a second embodiment in cross section.

In einem Verbrennungsmotor 1 - angedeutet durch eine zylinderwand eines Motorgehäuses - ist ein gebauter Kolben 2 verschiebbar angeordnet. Der gebaute Kolben 2 besteht aus einem Kolbenboden 3 und einem Kolbenunterteil 4, die miteinander über eine in der Kolbenlängsachse angeordnete Schraube 5 verbunden sind. Zwischen dem Kolbenboden 3 und dem Kolbenunterteil 4 liegen ein Kühlkanal 6 und ein zentraler Kühlraum 7, die jeweils von Kolbenboden und Kolbenunterteil begrenzt sind und die miteinander über Überströmkanäle 8 verbunden sind. Der Kolben 2 ist über einen Kolbenbolzen 9 mit einem kühlölführenden Pleuel 10 verbunden.In an internal combustion engine 1 - indicated by a cylinder wall of a motor housing - a built piston 2 is slidably disposed. The built piston 2 consists of a piston head 3 and a piston lower part 4, which are connected to each other via a screw 5 arranged in the piston longitudinal axis. Between the piston head 3 and the lower piston part 4 are a cooling channel 6 and a central cooling chamber 7, which are each bounded by the piston head and piston lower part and which are connected to each other via overflow 8. The piston 2 is connected via a piston pin 9 with a connecting rod 10 leading to cooling oil.

Im Bereich des Schraubenkopfs 11 ist ein Gleitschuh 12 unter Federvorspannung gleitverschiebbar auf dem Schraubenkopf angeordnet. Der Gleitschuh 12 weist eine Passungsfläche 13 auf, die mit einer bearbeiteten Fläche 14 am Pleuel 10 zusammenwirkt, wodurch Kühlölverluste zwischen Pleuel 10 und Gleitschuh 12 weitgehend verhindert werden. Ein Sicherungsring 15 im Schraubenkopf 11 dient als Transportsicherung gegen Verlust des Gleitschuhs 12. Der Schraubenkopf 11 stützt sich mit einer Anlagefläche 16 gegen einen Kragen 17 im Unterteil ab. Die Schraube 5 weist eine Bohrung 18 entlang der Längsachse und radial verlaufende Überlaufbohrungen 19 zum zentralen Kühlraum 7 auf. Die Feder 23 stützt sich gegen einen am Schraubenkopf angeformten Bund ab und drückt das Gleitstück 12 gegen das Pleuel 10.In the region of the screw head 11, a sliding shoe 12 is arranged in a spring-biased manner on the screw head. The shoe 12 has a fitting surface 13, which cooperates with a machined surface 14 on the connecting rod 10, whereby cooling oil losses between the connecting rod 10 and shoe 12 are largely prevented. A locking ring 15 in the screw head 11 serves as a transport lock against loss of the shoe 12. The screw head 11 is supported by a contact surface 16 against a collar 17 in the lower part. The screw 5 has a bore 18 along the longitudinal axis and radially extending overflow holes 19 to the central cooling chamber 7. The spring 23 is supported against an integrally formed on the screw head collar and pushes the slider 12 against the connecting rod 10th

Fig. 2 zeigt Abweichungen von Fig. 1 bezüglich der Führung des Kühlöls und der Einleitung der Verschraubungskräfte in den Kragen 17. Die Verschraubungskräfte werden über ein Distanzstück 20 und ein Führungsteil 21 in den Kragen 17 eingeleitet. Das Kühlöl fließt vom Gleitschuh 12 durch radiale Bohrungen 22 in den Raum zwischen Distanzstück 12 und Schraube 5 und von dort nach oben in den zentralen Kühlraum 7. Der Gleitschuh 12 ist in dem Führungsteil 21 gegen die Kraft einer Feder 23 verschiebbar gelagert. Die Feder 23 stützt sich gegen einen am Distanzstück angeordneten Bund ab. Das Führungsteil 21 wird beim Anziehen der Schraube 5 zwischen dem Distanzstück 20 und dem Kragen 17 fixiert.FIG. 2 shows deviations from FIG. 1 with regard to the guidance of the cooling oil and the introduction of the screwing forces into the collar 17. The screwing forces are introduced into the collar 17 via a spacer 20 and a guide part 21. The cooling oil flows from the shoe 12 through radial holes 22 in the space between spacer 12 and screw 5 and from there up into the central cooling chamber 7. The shoe 12 is slidably mounted in the guide member 21 against the force of a spring 23. The spring 23 is supported against a collar arranged on the spacer. The guide member 21 is fixed when tightening the screw 5 between the spacer 20 and the collar 17.

Claims (4)

  1. Internal-combustion engine with a constructed piston (2), consisting of a piston head (3) made of steel and a lower piston part (4), which are connected to one another via a single screw (5) arranged in the longitudinal piston axis or close to the longitudinal piston axis, and comprising a central cooling space (7) between the piston head and lower piston part, also comprising an oil-carrying connecting rod (10), which is connected by a piston bolt (9) to the lower piston part (4), characterised in that a sliding block (12) is provided in the region of the screw head (11) for transferring oil from the connecting rod (10) into the central cooling space (7), the screw head (11) being received at least partially radially inside the sliding block.
  2. Internal-combustion engine with a constructed piston according to claim 1, characterised in that the sliding block (12) is pressed by the force of a spring (23) against a machined surface (14) on the connecting rod (10).
  3. Internal-combustion engine with a constructed piston according to claim 2, characterised in that the screw (5) has a cooling oil-guiding bore (18) in its longitudinal axis.
  4. Internal-combustion engine with a constructed piston according to claim 2, characterised in that the cooling oil is guided from the sliding block (12) via a spacer (20) with radial intake bores (22) into the central cooling space (7) and in that the part of the screw (5) arranged inside the spacer (20) is surrounded by cooling oil, in that the screw head (11) is arranged at least partially radially inside the sliding block (12).
EP01940141A 2000-05-05 2001-04-07 Combustion engine with a built-up piston Expired - Lifetime EP1278951B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10022035A DE10022035A1 (en) 2000-05-05 2000-05-05 Internal combustion engine with built piston; has piston with base and lower part connected by screw having device in head to transfer oil from connecting rod to cooling chamber in piston
DE10022035 2000-05-05
PCT/DE2001/001404 WO2001086133A1 (en) 2000-05-05 2001-04-07 Combustion engine with a built-up piston

Publications (2)

Publication Number Publication Date
EP1278951A1 EP1278951A1 (en) 2003-01-29
EP1278951B1 true EP1278951B1 (en) 2006-03-01

Family

ID=7640965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01940141A Expired - Lifetime EP1278951B1 (en) 2000-05-05 2001-04-07 Combustion engine with a built-up piston

Country Status (7)

Country Link
US (1) US6829977B2 (en)
EP (1) EP1278951B1 (en)
JP (1) JP4490025B2 (en)
KR (1) KR100754536B1 (en)
BR (1) BR0110520B1 (en)
DE (2) DE10022035A1 (en)
WO (1) WO2001086133A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100488565B1 (en) * 2002-10-22 2005-05-11 현대자동차주식회사 Cooling and lubrication apparatus for piston
DE102004027974A1 (en) * 2004-06-08 2005-12-29 Mahle Gmbh A built piston and method of preventing damage in contact surfaces of the top and bottom of the piston
DE102005041409A1 (en) * 2005-09-01 2007-03-08 Mahle International Gmbh Two-piece piston for an internal combustion engine
DE102005042003A1 (en) * 2005-09-05 2007-03-08 Mahle International Gmbh Built, liquid cooled flask
WO2007068222A1 (en) * 2005-12-17 2007-06-21 Mahle International Gmbh Two-piece piston for an internal combustion engine
JP4748078B2 (en) * 2007-02-16 2011-08-17 株式会社豊田中央研究所 Internal combustion engine
JP4624373B2 (en) * 2007-03-20 2011-02-02 三井造船株式会社 Piston cooling hardware for internal combustion engines
US20080295683A1 (en) * 2007-05-30 2008-12-04 Mahle Gmbh Focal oiling for a piston assembly
DE102011100470A1 (en) * 2011-05-04 2012-11-08 Ks Kolbenschmidt Gmbh Method for producing a cooling channel piston and associated pistons
DE102012207951B4 (en) * 2012-05-11 2022-09-22 Man Energy Solutions Se Pistons of an internal combustion engine
DE102012208090B4 (en) * 2012-05-15 2022-03-24 Man Energy Solutions Se Pistons of an internal combustion engine
EP3008318B1 (en) 2013-06-14 2022-11-02 KS Kolbenschmidt GmbH Slide shoe for a piston for use in internal combustion engines
DE102016202643A1 (en) * 2016-02-22 2017-08-24 Mahle International Gmbh Piston of an internal combustion engine
MX2018013353A (en) 2016-05-04 2019-02-20 Ks Kolbenschmidt Gmbh Piston.
DE102018203417A1 (en) * 2018-03-07 2019-09-12 Mahle Lnternational Gmbh Piston arrangement of an internal combustion engine
KR20230062926A (en) 2021-11-01 2023-05-09 에이치디현대건설기계 주식회사 Construction machinery to reduce energy during boom down movement

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Also Published As

Publication number Publication date
JP2003532831A (en) 2003-11-05
US20030154855A1 (en) 2003-08-21
JP4490025B2 (en) 2010-06-23
EP1278951A1 (en) 2003-01-29
KR100754536B1 (en) 2007-09-04
KR20020093129A (en) 2002-12-12
BR0110520A (en) 2003-04-08
WO2001086133A1 (en) 2001-11-15
BR0110520B1 (en) 2010-02-23
US6829977B2 (en) 2004-12-14
DE10022035A1 (en) 2001-11-08
DE50109078D1 (en) 2006-04-27

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