EP0386329B1 - Cylinder block - Google Patents

Cylinder block Download PDF

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Publication number
EP0386329B1
EP0386329B1 EP89122254A EP89122254A EP0386329B1 EP 0386329 B1 EP0386329 B1 EP 0386329B1 EP 89122254 A EP89122254 A EP 89122254A EP 89122254 A EP89122254 A EP 89122254A EP 0386329 B1 EP0386329 B1 EP 0386329B1
Authority
EP
European Patent Office
Prior art keywords
crankcase
cylinders
slots
cooling
expansion slots
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
EP89122254A
Other languages
German (de)
French (fr)
Other versions
EP0386329A1 (en
Inventor
Herbert Dipl.-Ing. Ampferer
Rudolf Dipl.-Ing. Grandhuber
Thomas Dipl.-Ing. Brachert
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0386329A1 publication Critical patent/EP0386329A1/en
Application granted granted Critical
Publication of EP0386329B1 publication Critical patent/EP0386329B1/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
    • F02F1/108—Siamese-type cylinders, i.e. cylinders cast 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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0002—Cylinder arrangements
    • F02F7/0007—Crankcases of engines with cylinders in line

Definitions

  • the invention relates to a cylinder crankcase according to the preamble of patent claim 1.
  • GB-A-2 010 394 deals with a cylinder crankcase for a multi-cylinder internal combustion engine in the cylinder of which iron-metallic cylinder liners are provided.
  • the cylinders are separated by partitions running transversely to the longitudinal direction of the cylinder crankcase and are partially surrounded by cooling water channels. Slots are provided in the partitions, which are introduced from the parting plane between the cylinder head and the cylinder crankcase.
  • the object of the invention is to implement targeted thermal expansion measures on a cylinder crankcase comprising a plurality of cylinders and equipped with cooling water channels and made of a light metal alloy. It should be ensured, however, that the stability of the cylinder crankcase is maintained despite these measures.
  • the thermal expansion slots compensate for the temperature tolerances occurring during operation of the internal combustion engine on the cylinder crankcase - it consists of a light metal alloy - and mechanical wear, for example caused by the entry of cooling water into the thermal expansion slots Cavitation, due to the elastic sealant between the cooling channels and the thermal expansion slots is counteracted.
  • This can be achieved in a simple manner by means of the sealing body or the cushion-like plastic filling the thermal expansion slots.
  • the cylinder crankcase 1 is part of a reciprocating internal combustion engine, not shown, with a plurality of cylinders of the series type, which works in the four-stroke process.
  • the cylinder crankcase 1 is made of a light metal alloy, iron-metallic cylinder liners 4, 5 being inserted into the individual spaced cylinders 2, 3. 6 and 7 denote the central axes of the cylinders 2, 3.
  • the cylinders 2, 3 are surrounded by cooling water channels 8, 9 over a substantial portion.
  • the cylinder crankcase 1 is delimited by a parting plane 10, which extends between said housing and a cylinder head 11 (FIG. 4).
  • a cylinder head gasket is designated by 12.
  • heat-emitting combustion spaces are provided by the upright partitions 13 - they also separate the cooling water channels 8, 9 in the area of the cylinder crankcase - between the cylinders 2, 3 are subject to special temperature stresses.
  • 13 thermal expansion slots 14 are provided in the dividing walls running transversely to the longitudinal direction C-C. Milling, sawing or the like are introduced. It is sufficient if the thermal expansion slots 14 are approximately between 0.4 and 0.8 mm - dimension B - wide (FIG. 2) and approximately 20 mm deep - dimension C - (FIG. 1).
  • the thermal expansion slots 14 open with their two ends 15, 16 into the cooling water channels 8, 9. So that the webs 17, 18 of each partition 3 are not damaged by cavitation during operation of the internal combustion engine, the thermal expansion slots 14 are sealed against water ingress from the cooling water channels 8, 9. This can be done by essentially filling the thermal expansion slots 14 with a cushion-like plastic 19 (FIG. 2), for example silicone.
  • the plastic 19 can be introduced by casting or a similar method.
  • sealing bodies 20, 21 are provided in the region of the ends 16, 17 of the thermal expansion slots 14, which are made of elastomer or plastic and prevent cooling water from entering the thermal expansion slots 14.
  • the sealing bodies 20, 21 have a circular cylindrical basic shape and are fixed in corresponding bores 22, 23 which run parallel to the central axes 6, 7 of the cylinders 2, 3.

Description

Die Erfindung betrifft ein Zylinderkurbelgehäuse nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a cylinder crankcase according to the preamble of patent claim 1.

Es ist bekannt (DE-PS 29 11 628), einzelne Leichtmetallzylinder, die luftgekühlt sind, im an den Zylinderkopf angrenzenden Bereich mit Wärmedehnungseinrichtungen zu versehen, die den dort auftretenden Verwerfungen und Ausbuchtungen entgegenwirken.It is known ( DE-PS 29 11 628 ) to provide individual light metal cylinders which are air-cooled in the area adjacent to the cylinder head with thermal expansion devices which counteract the distortions and bulges occurring there.

Die GB-A-2 010 394 behandelt ein Zylinderkurbelgehäuse für eine mehrzylindrige Brennkraftmaschine in dessen Zylinder eisenmetallische Zylinderlaufbüchsen vorgesehen sind. Die Zylinder sind durch quer zur Längsrichtung des Zylinderkurbelgehäuses verlaufende Trennwände getrennt und abschnittsweise von Kühlwasserkanälen umgeben. In den Trennwänden sind Schlitze vorgesehen, die von der Trennebene zwischen dem Zylinderkopf und dem Zylinderkurbelgehäuse aus eingebracht sind.GB-A-2 010 394 deals with a cylinder crankcase for a multi-cylinder internal combustion engine in the cylinder of which iron-metallic cylinder liners are provided. The cylinders are separated by partitions running transversely to the longitudinal direction of the cylinder crankcase and are partially surrounded by cooling water channels. Slots are provided in the partitions, which are introduced from the parting plane between the cylinder head and the cylinder crankcase.

Aufgabe der Erfindung ist es, an einem mehrere Zylinder umfassenden, mit Kühlwasserkanälen ausgestatteten Zylinderkurbelgehäuse aus einer Leichtmetalllegierung gezielte Wärmedehnungsmaßnahmen zu verwirklichen. Dabei sollte aber sichergestellt sein, daß trotz dieser Maßnahmen die Standfestigkeit des Zylinderkurbelgehäuses erhalten bleibt.The object of the invention is to implement targeted thermal expansion measures on a cylinder crankcase comprising a plurality of cylinders and equipped with cooling water channels and made of a light metal alloy. It should be ensured, however, that the stability of the cylinder crankcase is maintained despite these measures.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. Weitere, die Erfindung ausgestaltende Merkmale sind in den Unteransprüchen enthalten.According to the invention, this object is achieved by the characterizing features of patent claim 1. Further features embodying the invention are contained in the subclaims.

Die mit der Erfindung hauptsächlich erzielten Vorteile sind darin zu sehen, daß durch die Wärmedehnungsschlitze einerseits die im Betrieb der Brennkraftmaschine am Zylinderkurbelgehäuse - es besteht ja aus einer Leichtmetalllegierung - auftretenden Temperaturtoleranzen ausgeglichen werden und andererseits mechanischer Verschleiß, beispielsweise durch Eintritt von Kühlwasser in die Wärmedehnungsschlitze hervorgerufene Kavitation, aufgrund der elastischen Dichtmittel zwischen den Kühlkanälen und den Wärmedehnungsschlitzen entgegengewirkt ist. Dies kann auf einfache Weise durch die Dichtkörper oder den die Wärmedehnungsschlitze ausfüllenden polsterartigen Kunststoff erreicht werden.The main advantages achieved with the invention are that the thermal expansion slots compensate for the temperature tolerances occurring during operation of the internal combustion engine on the cylinder crankcase - it consists of a light metal alloy - and mechanical wear, for example caused by the entry of cooling water into the thermal expansion slots Cavitation, due to the elastic sealant between the cooling channels and the thermal expansion slots is counteracted. This can be achieved in a simple manner by means of the sealing body or the cushion-like plastic filling the thermal expansion slots.

In der Zeichnung werden Ausführungsbeispiele der Erfindung gezeigt, die nachstehend näher beschrieben sind.In the drawing, exemplary embodiments of the invention are shown, which are described in more detail below.

Es zeigt

  • Fig. 1 eine Teilansicht eines Längsschnitts durch ein Brennkraftmaschinen-Zylinderkurbelgehäuse,
  • Fig. 2 eine Einzelheit X der Fig. 1 in größerem Maßstab,
  • Fig. 3 eine Ansicht in Pfeilrichtung A der Fig. 1,
  • Fig. 4 einen Schnitt nach der Linie I -I der Fig. 3.
It shows
  • 1 is a partial view of a longitudinal section through an internal combustion engine cylinder crankcase,
  • 2 shows a detail X of FIG. 1 on a larger scale,
  • 3 is a view in the direction of arrow A of FIG. 1,
  • 4 shows a section along the line I -I of FIG. 3rd

Das Zylinderkurbelgehäuse 1 ist Bestandteil einer nicht näher dargestellten Hubkolben-Brennkraftmaschine mit mehreren Zylindern der Reihenbauart, die im Viertakt-Verfahren arbeitet. Aus Gewichtsgründen besteht das Zylinderkurbelgehäuse 1 aus einer Leichtmetalllegierung, wobei in die einzelnen beabstandeten Zylinder 2, 3 eisenmetallische Zylinderlaufbüchsen 4, 5 eingesetzt sind. Mit 6 und 7 sind die Mittelachsen der Zylinder 2, 3 bezeichnet. Außerdem sind die Zylinder 2, 3 über einen wesentlichen Teilbereich von Kühlwasserkanälen 8, 9 umgeben.The cylinder crankcase 1 is part of a reciprocating internal combustion engine, not shown, with a plurality of cylinders of the series type, which works in the four-stroke process. For reasons of weight, the cylinder crankcase 1 is made of a light metal alloy, iron-metallic cylinder liners 4, 5 being inserted into the individual spaced cylinders 2, 3. 6 and 7 denote the central axes of the cylinders 2, 3. In addition, the cylinders 2, 3 are surrounded by cooling water channels 8, 9 over a substantial portion.

Darüber hinaus wird das Zylinderkurbelgehäuse 1 von einer Trennebene 10 begrenzt, die sich zwischen besagtem Gehäuse und einem Zylinderkopf 11 erstreckt (Fig. 4). Eine Zylinderkopfdichtung ist mit 12 bezeichnet. Beiderseits der Trennebene 10 sind Wärme abgebende Brennraüme vorgesehen durch die aufrechte Trennwände 13 - sie trennen im Bereich der Zylinderkurbelgehaüses auch die Kühlwasserkanäle 8,9 - zwischen den Zylinder 2, 3 besonderen Temperaturbeanspruchungen unterliegen. Um sie - in Längsrichtung C-C Zylinderkurbelgehäuse gesehenauszugleichen, d.h. um die Durchmesser D₁ und D₂ der Zylinder 2, 3 im Rahmen festgelegter Toleranzen zu halten, sind in den quer zur Längsrichtung C-C verlaufenden Trennwänden 13 Wärmedehnungsschlitze 14 vorgesehen, die von der Trennebene 10 aus mittels mechanischer Verfahren, z.B. Fräsen, Sägen oder dergleichen, eingebracht sind. Dabei genügt es, wenn die Wärmedehnungsschlitze 14 etwa zwischen 0,4 und 0,8 mm - Maß B - breit (Fig. 2) und etwa 20 mm tief - Maß C - sind (Fig. 1).In addition, the cylinder crankcase 1 is delimited by a parting plane 10, which extends between said housing and a cylinder head 11 (FIG. 4). A cylinder head gasket is designated by 12. On both sides of the parting plane 10, heat-emitting combustion spaces are provided by the upright partitions 13 - they also separate the cooling water channels 8, 9 in the area of the cylinder crankcase - between the cylinders 2, 3 are subject to special temperature stresses. To compensate for them in the longitudinal direction of the C-C cylinder crankcase, i.e. In order to keep the diameters D 1 and D 2 of the cylinders 2, 3 within the framework of defined tolerances, 13 thermal expansion slots 14 are provided in the dividing walls running transversely to the longitudinal direction C-C. Milling, sawing or the like are introduced. It is sufficient if the thermal expansion slots 14 are approximately between 0.4 and 0.8 mm - dimension B - wide (FIG. 2) and approximately 20 mm deep - dimension C - (FIG. 1).

Die Wärmedehnungsschlitze 14 münden mit ihren beiden Enden 15, 16 in die Kühlwasserkanäle 8, 9. Damit die Stege 17, 18 jeder Trennwand 3 nicht durch Kavitation während des Betriebs der Brennkraftmaschine beschädigt werden, sind die Wärmedehnungsschlitze 14 gegen Wassereintritt aus den Kühlwasserkanälen 8, 9 abgedichtet. Dies kann dadurch erfolgen, daß die Wärmedehnungsschlitze 14 mit einem polsterkörperartigen Kunststoff 19 (Fig. 2), beispielsweise Silikon, im wesentlichen ausgefüllt sind. Der Kunststoff 19 kann durch Gießen oder ein ähnliches Verfahren eingebracht werden.The thermal expansion slots 14 open with their two ends 15, 16 into the cooling water channels 8, 9. So that the webs 17, 18 of each partition 3 are not damaged by cavitation during operation of the internal combustion engine, the thermal expansion slots 14 are sealed against water ingress from the cooling water channels 8, 9. This can be done by essentially filling the thermal expansion slots 14 with a cushion-like plastic 19 (FIG. 2), for example silicone. The plastic 19 can be introduced by casting or a similar method.

Gemäß Fig. 3 sind im Bereich der Enden 16, 17 der Wärmedehnungsschlitze 14 Dichtkörper 20, 21 vorgesehen, die aus Elastomer oder Kunststoff bestehen und Kühlwassereintritt in die Wärmedehnungsschlitze 14 verhindern. Die Dichtkörper 20, 21 weisen eine kreiszylindrische Grundform auf und sind in korrespondierenden Bohrungen 22, 23 festgesetzt, die parallel zu den Mittelachsen 6, 7 der Zylinder 2, 3 verlaufen.According to FIG. 3, sealing bodies 20, 21 are provided in the region of the ends 16, 17 of the thermal expansion slots 14, which are made of elastomer or plastic and prevent cooling water from entering the thermal expansion slots 14. The sealing bodies 20, 21 have a circular cylindrical basic shape and are fixed in corresponding bores 22, 23 which run parallel to the central axes 6, 7 of the cylinders 2, 3.

Claims (5)

1. A crankcase (1) for a multiple-cylinder internal combustion engine, comprising spaced cylinders (2, 3) preferably provided with ferrous-metal liners (4, 5), wherein the cylinders are separated by partition walls (13) extending transversely to the longitudinal direction of the crankcase and are surrounded at least in part by cooling-water ducts (8, 9), slots (14) being provided on the cylinders in the partition walls and extending from the separation plane (10) between the cylinder head (11) and the crankcase (1), characterized in that the crankcase (1) consists of a light-metal alloy, and the slots are sealed off from the cooling-water ducts by resilient means.
2. A crankcase according to Claim 1, characterized in that the resilient means are provided in the form of sealing members (20, 21) in the region of ends (15, 16) of the thermal-expansion slots (14) adjacent to the cooling-water ducts (8, 9).
3. A crankcase according to Claim 2, characterized in that the sealing members (20, 21 ) have a circular cylindrical basic shape and rest in bores (22, 23) in the crankcase (1) extending parallel to the median axes (6, 7) of the cylinders (2, 3).
4. A crankcase according to Claim 3, characterized in that the sealing members (20, 21) consist of elastomer or plastics material.
5. A crankcase according to Claim 1, characterized in that the resilient means are provided in the form of a plastics material (19), such as silicone for example, inserted and preferably poured into the thermal-expansion slots (14).
EP89122254A 1989-03-04 1989-12-02 Cylinder block Expired - Lifetime EP0386329B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907099A DE3907099C1 (en) 1989-03-04 1989-03-04
DE3907099 1989-03-04

Publications (2)

Publication Number Publication Date
EP0386329A1 EP0386329A1 (en) 1990-09-12
EP0386329B1 true EP0386329B1 (en) 1992-03-11

Family

ID=6375610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122254A Expired - Lifetime EP0386329B1 (en) 1989-03-04 1989-12-02 Cylinder block

Country Status (5)

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US (1) US4974569A (en)
EP (1) EP0386329B1 (en)
JP (1) JPH02271057A (en)
DE (2) DE3907099C1 (en)
ES (1) ES2030256T3 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100363703C (en) * 2001-10-24 2008-01-23 贝洱两合公司 Thermal conductor
DE10218521A1 (en) * 2002-04-25 2003-11-06 Behr Gmbh & Co Exhaust gas heat exchanger, especially for motor vehicles
US20050150476A1 (en) * 2002-08-06 2005-07-14 Uwe Gohrbandt Combination of cylinder liners consisting of a light metal alloy
US7098173B2 (en) * 2002-11-19 2006-08-29 General Motors Corporation Thermally stable antifoam agent for use in automatic transmission fluids
US20040121921A1 (en) * 2002-12-20 2004-06-24 Calcut Brent D. Thermally stable antifoam agent and methods for use in functional fluids
US7056870B2 (en) * 2003-02-12 2006-06-06 General Motors Corporation Controlled release of antifoam additives from compounded rubber
US7087674B2 (en) * 2003-02-12 2006-08-08 General Motors Corporation Controlled release of perfluoropolyether antifoam additives from compounded rubber
FR2887926B1 (en) * 2005-06-29 2010-08-13 Peugeot Citroen Automobiles Sa CYLINDER SHAPER FOR AN INTERNAL COMBUSTION ENGINE AND BLOCK CYLINDERS EQUIPPED WITH SUCH A SHIRT
JP4913135B2 (en) * 2005-07-06 2012-04-11 チーム オリオン ヨーロッパ エス．エー． 2-stroke engine especially for land craft, water craft or air craft models
US7677218B2 (en) * 2007-07-31 2010-03-16 Caterpillar Inc. Cylinder head including a stress slot with filler
EP2309114B1 (en) * 2009-07-30 2012-09-12 Ford Global Technologies, LLC Cooling system

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE2756120A1 (en) * 1977-12-16 1979-06-21 Daimler Benz Ag CYLINDER BLOCK FOR A PARTICULAR AIR COMPRESSING COMBUSTION MACHINE
DE2836810A1 (en) * 1978-08-23 1980-03-06 Daimler Benz Ag CYLINDER BLOCK EXISTING FROM LIGHT METAL DIE CASTING
DE2911628C2 (en) * 1979-03-24 1982-09-09 Mahle Gmbh, 7000 Stuttgart Light metal cylinders for internal combustion engines
JPS5985446A (en) * 1982-11-04 1984-05-17 Fuji Heavy Ind Ltd Cylinder block of internal-combustion engine with multicylinder
DE3408490A1 (en) * 1984-03-08 1985-09-12 Willibald 8000 München Hiemer Cylinder block of a water-cooled reciprocating piston internal combustion engine
JPS62225751A (en) * 1986-03-27 1987-10-03 Daihatsu Motor Co Ltd Cooling device for siamese type cylinder block
DE3623742A1 (en) * 1986-07-14 1988-01-28 Opel Adam Ag Cylinder block for an internal combustion engine
US4856462A (en) * 1986-11-13 1989-08-15 Honda Giken Kogyo Kabushiki Kaisha Cylinder block made of fiber-reinforced light alloy for internal combustion engine

Also Published As

Publication number Publication date
ES2030256T3 (en) 1992-10-16
DE3907099C1 (en) 1989-11-16
US4974569A (en) 1990-12-04
DE58900959D1 (en) 1992-04-16
EP0386329A1 (en) 1990-09-12
JPH02271057A (en) 1990-11-06

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