EP0529370A1 - Liquid-cooled cylinder sleeve - Google Patents

Liquid-cooled cylinder sleeve Download PDF

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Publication number
EP0529370A1
EP0529370A1 EP92113457A EP92113457A EP0529370A1 EP 0529370 A1 EP0529370 A1 EP 0529370A1 EP 92113457 A EP92113457 A EP 92113457A EP 92113457 A EP92113457 A EP 92113457A EP 0529370 A1 EP0529370 A1 EP 0529370A1
Authority
EP
European Patent Office
Prior art keywords
guide ring
liner
internal combustion
outer diameter
combustion engine
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.)
Granted
Application number
EP92113457A
Other languages
German (de)
French (fr)
Other versions
EP0529370B1 (en
Inventor
Hans-Jürgen Schacht
Reinhard Häfner
Detlef Dr. Zigan
Walter Brüggebors
Günter Haemmerling
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.)
Caterpillar Motoren GmbH and Co KG
Original Assignee
Krupp Mak Maschinenbau 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 Krupp Mak Maschinenbau GmbH filed Critical Krupp Mak Maschinenbau GmbH
Publication of EP0529370A1 publication Critical patent/EP0529370A1/en
Application granted granted Critical
Publication of EP0529370B1 publication Critical patent/EP0529370B1/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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/16—Cylinder liners of wet type
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • F02F1/183—Oval or square cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to an internal combustion engine with a cylinder crankcase in which liners for the pistons are supported in receptacles via guide rings.
  • crankcase expands elastically, more in the transverse direction than in the longitudinal direction.
  • the liner can expand accordingly or is elastically deformed, which leads to the fact that the liners become oval in operation in their barrel diameter for the pistons.
  • the object of the invention is to provide a liner in a cylinder crankcase of an engine, in particular a diesel engine, which enables a constant change of location of the ring joints.
  • each guide ring of the liner has an approximately the dimension of the elastic expansion of the cylinder crankcase in the transverse direction and in the region of the receptacle corresponding ovality with an outer diameter that is larger than the outer diameter of the guide ring in the longitudinal direction.
  • the larger diameter of the guide ring is provided in the transverse direction of the engine, in which the crankcase has its maximum extension. This has the effect that when the crankcase is expanded, the liner becomes almost round again in cross section.
  • the ovality of the guide ring on the liner can be achieved in a simple manner on oval turning machines or by radial tensioning of the liner.
  • a measurement can be made on a conventional type liner, and this measurement is the basis of the ovality of the guide ring on the liner.
  • liners 2 for pistons of an internal combustion engine are used in receptacles 6.
  • the bushings 2 are axially supported on the end of the housing 1 by a collar 3. Radial support of the liner 2 on the housing takes place via a guide ring 4, which is separated from the front collar 3 via a fillet 5.
  • the housing 1 has a greater elastic expansion in the transverse direction in a vertical plane y-y than in the longitudinal direction in a vertical plane x-x. This causes the liner 2 to deform and the inner diameter of the bore 7 of the liner 2 to also deform oval.
  • the guide ring 4 has a defined ovality with an outer diameter D which is larger in the transverse direction (plane y-y) than the diameter D1 in the longitudinal direction (plane x-x).
  • the outer diameter D of the guide ring 4 is larger than the outer diameter D1 in the longitudinal direction (plane xx).
  • the size of the ovality of the ring 4 is in each case dependent on the elastic expansion of the housing 1, so that the Inner diameter d of the liner during operation of the internal combustion engine is almost round again in cross section or within the permissible tolerance range.

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

Abstract

In an internal combustion engine, especially a diesel engine, cylinder liners (2) are respectively supported by way of guide rings (5) in respective mountings in a cylinder crank case. In order to obtain a cylinder liner inside diameter of circular cross-section despite an elastic expansion of the accommodating case (1), the guide ring (4) of the cylinder liner (2) is designed with an oval cross section in the direction of the maximum expansion. This prevents the occurrence of any further significant deviations from the circular-cylindrical form of the inside diameter of the cylinder liner. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Brennkraftmaschine mit einem Zylinderkurbelgehäuse, in dem Laufbuchsen für die Kolben in Aufnahmen über Führungsringe abgestützt sind.The invention relates to an internal combustion engine with a cylinder crankcase in which liners for the pistons are supported in receptacles via guide rings.

Es ist bekannt eine Zylinderlaufbuchse zur axialen Festlegung in einer Aufnahme eines Zylinderkurbelgehäuses mit einem Auflagekragen zu versehen, der sich am Gehäuse oberseitig abstützt. Über einen anschließenden, durch eine Hohlkehle getrennten Führungsring am zylindrischen Umfang der Laufbuchse wird diese radial im Gehäuse abgestützt. Der Außendurchmesser des Führungsringes ist kaum kleiner als die Aufnahme im Gehäuse, so daß sich die Laufbuchse im erwärmten Zustand, bei Betrieb der Brennkraftmaschine, pressend anlegt.It is known to provide a cylinder liner for axially fixing in a receptacle of a cylinder crankcase with a support collar which is supported on the upper side of the housing. A subsequent guide ring, separated by a groove, on the cylindrical circumference of the liner is supported radially in the housing. The outer diameter of the guide ring is hardly smaller than the receptacle in the housing, so that the liner presses when heated, when the internal combustion engine is operating.

Bei Betrieb der Brennkraftmaschine hat sich gezeigt, daß das Kurbelgehäuse sich elastisch ausdehnt, und zwar in Querrichtung stärker als in Längsrichtung. Hierdurch kann sich die Laufbuchse entsprechend dehnen bzw. wird elastisch verformt, was dazu führt, daß die Laufbuchsen im Betrieb oval in ihrem Laufdurchmesser für die Kolben werden.During operation of the internal combustion engine, it has been shown that the crankcase expands elastically, more in the transverse direction than in the longitudinal direction. As a result, the liner can expand accordingly or is elastically deformed, which leads to the fact that the liners become oval in operation in their barrel diameter for the pistons.

Diese Ovalität bewirkt in nachteiliger Weise, daß Kolbenringstöße bevorzugt in Querrichtung des Motors zum Stillstand kommen und nicht mehr umlaufen.This ovality has the disadvantage that piston ring impacts preferably come to a standstill in the transverse direction of the engine and no longer rotate.

Aufgabe der Erfindung ist es, eine Laufbuchse in einem Zylinderkurbelgehäuse eines Motors, insbesondere eines Dieselmotors, zu schaffen, die einen ständigen Ortswechsel der Ringstöße ermöglichen.The object of the invention is to provide a liner in a cylinder crankcase of an engine, in particular a diesel engine, which enables a constant change of location of the ring joints.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß jeder Führungsring der Laufbuchse eine etwa dem Maß der elastischen Ausdehnung des Zylinderkurbelgehäuses in Querrichtung und im Bereich der Aufnahme entsprechende Ovalität mit einem Außendurchmesser aufweist, der größer ist als der Außendurchmesser des Führungsringes in Längsrichtung.This object is achieved in that each guide ring of the liner has an approximately the dimension of the elastic expansion of the cylinder crankcase in the transverse direction and in the region of the receptacle corresponding ovality with an outer diameter that is larger than the outer diameter of the guide ring in the longitudinal direction.

Weitere vorteilhafte Ausbildungen sind durch die Merkmale der Unteransprüche gekennzeichnet.Further advantageous developments are characterized by the features of the subclaims.

Die mit der Erfindung im wesentlichen erzielten Vorteile bestehen darin, daß durch einen oval gedrehten Führungsring an der Laufbuchse eine kreiszylindische Innen-Lauffläche für Kolben und Kolbenringe entsteht.The advantages essentially achieved with the invention consist in the fact that an oval-turned guide ring on the bushing creates a circular cylindrical inner running surface for pistons and piston rings.

Der größere Durchmesser des Führungsringes ist hierzu in der Querrichtung des Motors vorgesehen, in der das Kurbelgehäuse seine maximale Ausdehnung aufweist. Dieses bewirkt, daß bei einer Ausdehnung des Kurbelgehäuses die Laufbuchse nahezu im Querschnitt wieder rund wird. Die Ovalität des Führungsringes an der Laufbuchse kann auf Ovaldrehmaschinen oder aber durch ein radiales Verspannen der Laufbuchse in einfacher Weise erzielt werden.For this purpose, the larger diameter of the guide ring is provided in the transverse direction of the engine, in which the crankcase has its maximum extension. This has the effect that when the crankcase is expanded, the liner becomes almost round again in cross section. The ovality of the guide ring on the liner can be achieved in a simple manner on oval turning machines or by radial tensioning of the liner.

Um ein genaues Maß der Ovalität zu erreichen, kann eine Messung an einer Laufbuchse herkömmlicher Art vorgenommen werden, und diese Messung ist Grundlage der Ovalität des Führungsringes an der Laufbuchse.In order to achieve an accurate measure of ovality, a measurement can be made on a conventional type liner, and this measurement is the basis of the ovality of the guide ring on the liner.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt. Es zeigen:

Fig. 1
einen Halbschnitt einer in ein Zylinderkurbelgehäuse eingesetzten Laufbuchse und
Fig. 2
einen teilweisen Schnitt nach der Linie II-II der Fig. 1 mit einem ovalen Führungsring.
An embodiment of the invention is shown schematically in the drawing. Show it:
Fig. 1
a half section of a liner inserted in a cylinder crankcase and
Fig. 2
a partial section along the line II-II of FIG. 1 with an oval guide ring.

In einem Zylinderkurbelgehäuse 1 sind Laufbuchsen 2 für Kolben einer Brennkraftmaschine in Aufnahmen 6 eingesetzt. Die Laufbuchsen 2 stützen sich axial jeweils über einen Kragen 3 stirnseitig am Gehäuse 1 ab. Eine radiale Abstützung der Laufbuchse 2 am Gehäuse erfolgt über einen Führungsring 4, der vom stirnseitigen Kragen 3 über eine Hohlkehle 5 getrennt ist.In a cylinder crankcase 1 liners 2 for pistons of an internal combustion engine are used in receptacles 6. The bushings 2 are axially supported on the end of the housing 1 by a collar 3. Radial support of the liner 2 on the housing takes place via a guide ring 4, which is separated from the front collar 3 via a fillet 5.

Das Gehäuse 1 weist in Querrichtung in einer senkrechten Ebene y-y eine größere elastische Ausweitung auf als in Längsrichtung in einer senkrechten Ebene x-x. Dieses bewirkt, daß die Laufbuchse 2 sich verformt und der Innendurchmesser der Bohrung 7 der Laufbuchse 2 sich auch oval verformt.The housing 1 has a greater elastic expansion in the transverse direction in a vertical plane y-y than in the longitudinal direction in a vertical plane x-x. This causes the liner 2 to deform and the inner diameter of the bore 7 of the liner 2 to also deform oval.

Um dieses zu vermeiden, weist der Führungsring 4 eine definierte Ovalität mit einem Außendurchmesser D auf, welcher in Querrichtung (Ebene y-y) größer ist als der Durchmesser D1 in Längsrichtung (Ebene x-x).To avoid this, the guide ring 4 has a defined ovality with an outer diameter D which is larger in the transverse direction (plane y-y) than the diameter D1 in the longitudinal direction (plane x-x).

Das Gesamtmaß der Ovalität beträgt ca. 2a = 0,1 bis 0,4 mm (D - D1). Um dieses Maß a+a ist der Außendurchmesser D des Führungsringes 4 größer als der Außendurchmesser D1 in Längsrichtung (Ebene x-x). Die Größe der Ovalität des Ringes 4 ist jeweils abhängig von der elastischen Ausdehnung des Gehäuses 1, damit der Innendurchmesser d der Laufbuchse im Betrieb der Brennkraftmaschine nahezu wieder im Querschnitt rund bzw. im zulässigen Toleranzbereich liegt.The total measure of ovality is approx. 2a = 0.1 to 0.4 mm (D - D1). By this dimension a + a, the outer diameter D of the guide ring 4 is larger than the outer diameter D1 in the longitudinal direction (plane xx). The size of the ovality of the ring 4 is in each case dependent on the elastic expansion of the housing 1, so that the Inner diameter d of the liner during operation of the internal combustion engine is almost round again in cross section or within the permissible tolerance range.

Claims (3)

Brennkraftmaschine mit einem Zylinderkurbelgehäuse, in dem Laufbuchsen für die Kolben in Aufnahmen über Führungsringe abgestützt sind, dadurch gekennzeichnet, daß jeder Führungsring (4) der Laufbuchse (2) eine etwa dem Maß der elastischen Ausdehnung des Zylinderkurbelgehäuses (1) in Querrichtung (Ebene y-y) und im Bereich der Aufnahme (6) entsprechende Ovalität mit einem Außendurchmesser (D) aufweist, der größer ist als der Außendurchmesser (D1) des Führungsringes (4) in Längsrichtung (Ebene x-x).Internal combustion engine with a cylinder crankcase in which liners for the pistons are supported in receptacles via guide rings, characterized in that each guide ring (4) of the liner (2) has an approximately the extent of the elastic expansion of the cylinder crankcase (1) in the transverse direction (plane yy) and in the area of the receptacle (6) has a corresponding ovality with an outer diameter (D) which is larger than the outer diameter (D1) of the guide ring (4) in the longitudinal direction (plane xx). Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Außendurchmesser (D) des Führungsringes (4) etwa 0,1 mm bis 0,4 mm größer ist als der Außendurchmesser (D1).Internal combustion engine according to claim 1, characterized in that the outer diameter (D) of the guide ring (4) is approximately 0.1 mm to 0.4 mm larger than the outer diameter (D1). Brennkraftmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Führungsring (4) der Laufbuchse (2) oval gedreht ist und eine zylindrische Bohrung (7) mit dem Innendurchmesser (d) aufweist.Internal combustion engine according to claim 1 or 2, characterized in that the guide ring (4) of the liner (2) is rotated oval and has a cylindrical bore (7) with the inside diameter (d).
EP92113457A 1991-08-30 1992-08-07 Liquid-cooled cylinder sleeve Expired - Lifetime EP0529370B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4128800A DE4128800A1 (en) 1991-08-30 1991-08-30 INTERNAL COMBUSTION ENGINE
DE4128800 1991-08-30

Publications (2)

Publication Number Publication Date
EP0529370A1 true EP0529370A1 (en) 1993-03-03
EP0529370B1 EP0529370B1 (en) 1995-03-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113457A Expired - Lifetime EP0529370B1 (en) 1991-08-30 1992-08-07 Liquid-cooled cylinder sleeve

Country Status (3)

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EP (1) EP0529370B1 (en)
DE (2) DE4128800A1 (en)
FI (1) FI923823A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032124A1 (en) * 1996-03-02 1997-09-04 Ford Motor Company Limited Forming cylinder bores

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR900136A (en) * 1942-12-08 1945-06-20 Ets Ringhoffer Tatra Sa Cylinder for air-cooled engines
US4127058A (en) * 1974-08-13 1978-11-28 Mahle Gmbh Liquid-cooled cylinder sleeves
GB2088949A (en) * 1980-12-09 1982-06-16 Cummins Engine Co Inc Bottom stop cylinder liner for an ic engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR900136A (en) * 1942-12-08 1945-06-20 Ets Ringhoffer Tatra Sa Cylinder for air-cooled engines
US4127058A (en) * 1974-08-13 1978-11-28 Mahle Gmbh Liquid-cooled cylinder sleeves
GB2088949A (en) * 1980-12-09 1982-06-16 Cummins Engine Co Inc Bottom stop cylinder liner for an ic engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032124A1 (en) * 1996-03-02 1997-09-04 Ford Motor Company Limited Forming cylinder bores

Also Published As

Publication number Publication date
DE4128800A1 (en) 1993-03-04
DE59201649D1 (en) 1995-04-20
EP0529370B1 (en) 1995-03-15
FI923823A0 (en) 1992-08-26
FI923823A (en) 1993-03-01

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