WO2008125254A1 - Culasse pour moteur à combustion interne - Google Patents

Culasse pour moteur à combustion interne Download PDF

Info

Publication number
WO2008125254A1
WO2008125254A1 PCT/EP2008/002791 EP2008002791W WO2008125254A1 WO 2008125254 A1 WO2008125254 A1 WO 2008125254A1 EP 2008002791 W EP2008002791 W EP 2008002791W WO 2008125254 A1 WO2008125254 A1 WO 2008125254A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder head
bearing
aluminum
camshaft
assembly
Prior art date
Application number
PCT/EP2008/002791
Other languages
German (de)
English (en)
Inventor
Ralf Quaas
Original Assignee
Daimler 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 Daimler Ag filed Critical Daimler Ag
Publication of WO2008125254A1 publication Critical patent/WO2008125254A1/fr

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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0476—Camshaft bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements

Definitions

  • the present invention relates to a cylinder head for an internal combustion engine with a bearing assembly according to the preamble of claim 1.
  • the invention also relates to a method for producing such a bearing assembly on a cylinder head.
  • a cylinder head for an internal combustion engine in lightweight construction with at least one cast-in an external structure Einguss founded is known, wherein the outer structure and the sprue made of different materials.
  • the sprue is made of a single material with a bearing bracket and free-standing towards a crankcase, wherein the bearing bracket is separated from the sprue by a break-separating process.
  • the sprue has a radial opening which is at least partially filled with the material of the outer structure and in which an oil feed channel is arranged which connects an oil distributor channel to the crankshaft bearing.
  • camshafts are stored in an aluminum camshaft frame.
  • a lower half of the camshaft frame is functionally integrated in the gray cast-iron cylinder head.
  • the upper half of the camshaft frame is made of die-cast aluminum and is screwed onto the cylinder head. Since the cylinder head consists of gray cast iron, depending on the embodiment, a large number of bearing shells must be introduced for supporting the camshaft.
  • the present invention is concerned with the problem of manufacturing a bearing assembly for a camshaft in a cylinder head of an internal combustion engine manufacturing technology simpler and thus more cost-effectively.
  • the present invention is based on the general idea to produce the bearing assembly of a different material to the cylinder head, in particular a light metal alloy, and at the same time form an integral part of the cylinder head, so that a previously required and expensive assembly of separate bearings can be avoided.
  • the cylinder head is designed as a cast part, in particular as a cast iron part, while the bearing arrangement for the camshaft is made of a light metal alloy, in particular an aluminum alloy.
  • a cast cylinder head as it is often used in large and heavy engines, it is necessary for trouble-free operation that bearings are used, which on the one hand have a required wear resistance and on the other hand ensure optimum storage of the shaft. In conventional internal combustion engines, this has been achieved by the fact that consisting of aluminum or an aluminum alloy bearing shells are mounted on the cylinder head or the camshaft in a camshaft frame
  • Aluminum (alloys) run, in which later the camshaft is stored. Due to the design of the bearing assembly as an integral part of the cylinder head, the bearing assemblies consisting of a light metal alloy can be arranged on the cylinder head in such a way that expensive and therefore expensive assembly of bearing shells can be avoided.
  • the bearing arrangement is designed as a spray-applied bearing layer, in particular as an aluminum layer sprayed by means of laser wire spraying.
  • the integration of the bearing assembly in the cylinder head by means of the above-mentioned laser wire injection method has the advantage that not only a frictional bond between the cylinder head and bearing assembly can be achieved here, but also a cohesive bond, creating a particularly strong Connection of the bearing shell with the cylinder head can be guaranteed.
  • the bearing assembly is formed as a pressed-in bearing in the cylinder head bearing body. It is conceivable that a, preferably made of aluminum trained bearing body is pressed or pressed under pressure into a corresponding opening on the cylinder head. It is also conceivable that such a bearing body is firmly connected with the aid of a thermal joining process with the cylinder head.
  • Such a thermal joining method may include, for example, a cooling of the bearing body to be pressed or a heating of the cylinder head immediately before the joining process, which set due to the temperature changes negative thermal expansions on the bearing body and positive expansions on the cylinder head, which after pressing the bearing body in the cylinder head due to the attenuating temperatures again so that, for example, the cooled bearing body expands after being pressed in the opening of the cylinder head and thereby clamped against them.
  • 1 is a sectional view through a cylinder head with two bearing assemblies for each camshaft, wherein one of the bearing assemblies is designed as an inlay,
  • FIG. 2 is a perspective view of a bearing assembly according to the invention, which is designed as an applied bearing layer,
  • Fig. 3 is a top view of a camshaft bearing, wherein a bearing assembly is formed as a pressed-bearing body.
  • FIG. 1 far a cylinder head 1, two overhead camshaft bearings 2 and 2 ', which are integrally formed, in particular einstofflich, with the cylinder head 1.
  • the camshaft bearings 2 and 2 'shown in FIG. 1 only show a respective lower camshaft bearing half, which is supplemented by a respective upper, not shown, camshaft bearing half.
  • the upper camshaft bearing half can be designed, for example, as a camshaft bearing frame, in particular made of aluminum.
  • the cylinder head 1 shown in FIG. 1 is representative of a cylinder head of a passenger car or even a heavy vehicle.
  • the bearing assembly 2, 2 forms an integral part of the cylinder head 1 and is made of a different material to the cylinder head 1, in particular of a light metal alloy.
  • the cylinder head 1 itself is usually designed as a casting, in particular as a gray cast iron part.
  • the light alloy used for the bearing assembly 2, 2 ' is particularly an aluminum alloy into consideration.
  • the bearing assembly 2, 2' and the cylinder head 1 In order to ensure the most reliable connection between the bearing assembly 2, 2 'and the cylinder head 1, the bearing assembly 2, 2' and the cylinder head 1 non-positively and / or positively and / or cohesively connected to each other. In principle, four different embodiments of the bearing assemblies 2, 2 'and the connections between the bearing assemblies 2, 2' and the cylinder head 1 are possible.
  • a first possible connection or embodiment of the bearing assembly 2, 2 ' is that the bearing assembly 2, 2' as in the cylinder head 1 integrated inlay 3, in particular as an aluminum inlay is formed.
  • Such an inlay 3 is shown in FIG. 1 for the left bearing arrangement 2.
  • a preparation of the cylinder head 1 is carried out in particular by cutting processes, such as clearing, while a fixation of the inlay 3 on the cylinder head 1, for example via fixing elements, not shown, in particular via fixing pins, which engage in associated fixing sleeves on the cylinder head 1.
  • a further embodiment of the bearing arrangement may be, for example, that the bearing assembly 2 'than sprayed bearing layer 4 is formed, as shown for example on the bearing assembly 2 'of FIG. 1.
  • the spraying of the bearing layer 4 can be done for example by means of laser wire spraying or cold gas spraying.
  • the bearing layer 4 is also preferably a light metal alloy, in particular an aluminum alloy. As shown in FIG. 1, the bearing layer 4 is applied by means of a laser 5, for example.
  • this can be designed as an applied bearing layer 4 ', as shown for example in FIG. 2.
  • the bearing layer 4 ' is also preferably formed of a light metal alloy, in particular of an aluminum alloy.
  • the bearing layer 4 ' may be formed, for example, in the form of a thin sheet metal strip, which is pressed around the structure of the cylinder head 1, in particular by a cast iron structure, for example by a high-pressure ümform compiler, so that thereby the geometry of the bearing assembly 2, 2' is formed ,
  • the bearing assembly 2 is formed as a bearing body 6, which is or is pressed into the cylinder head 1.
  • the bearing body 6 may be formed, for example, as an aluminum block.
  • both in the embodiment of the bearing assembly 2, 2 'as inlay 3 (see Fig. 1) and as a bearing body 6 (see Fig. 3) and thermal joining method for connecting the bearing assembly 2, 2' with the cylinder head 1 can be used ,
  • the inlay 3 or the bearing body 6 is strongly cooled before being pressed in or before assembly, as a result of which it contracts.
  • the cylinder head 1 is heated prior to assembly of the inlay 3 or of the bearing block 6, so that a prepared recess for receiving the inlay 3 or of the bearing block 6 expands in terms of its dimensions.
  • the invention provides a bearing arrangement 2, 2 'for a camshaft, in particular a lower camshaft bearing part, which is currently formed as a cast part, in particular as a gray cast iron part, to be substituted by a light metal alloy, in particular by aluminum.
  • a complex assembly process of bearing shells as well as an optionally required elaborate preparation of the cylinder head 1 for mounting the bearing shells omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne une culasse (1) pour moteur à combustion interne, comprenant un dispositif à paliers (2, 2'). L'invention est caractérisée en ce que le dispositif à paliers (2, 2') est configuré de manière à supporter un arbre à cames, est formé d'une seule pièce avec la culasse (1) et est fabriqué en un matériau différent de celui de ladite culasse (1).
PCT/EP2008/002791 2007-04-11 2008-04-09 Culasse pour moteur à combustion interne WO2008125254A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007017025.6 2007-04-11
DE102007017025A DE102007017025A1 (de) 2007-04-11 2007-04-11 Zylinderkopf für eine Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2008125254A1 true WO2008125254A1 (fr) 2008-10-23

Family

ID=39744150

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/002791 WO2008125254A1 (fr) 2007-04-11 2008-04-09 Culasse pour moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102007017025A1 (fr)
WO (1) WO2008125254A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018121424A1 (de) 2018-09-03 2018-11-08 FEV Europe GmbH Zylinderkopf

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089735A (en) * 1960-06-02 1963-05-14 Fuchs Kg Otto Reciprocable combustion engine
DE2643628A1 (de) * 1975-10-09 1977-04-14 Fiat Veicoli Ind V-verbrennungsmotor
FR2508995A1 (fr) * 1981-07-03 1983-01-07 Ford France Support pour arbres a cames et procede de montage de l'arbre dans ce support
EP0088157A1 (fr) * 1982-03-09 1983-09-14 Klöckner-Humboldt-Deutz Aktiengesellschaft Culasse pour un moteur à combustion interne, refroidi par eau
WO2001019549A1 (fr) * 1999-09-13 2001-03-22 Federal-Mogul Corporation Roulement de liaison et procede de fabrication correspondant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3404866C1 (de) 1984-02-11 1985-06-27 Audi AG, 8070 Ingolstadt Gegossener Zylinderblock für eine Hubkolbenmaschine sowie Vorrichtung zum Gießen eines derartigen Zylinderblockes
DE19634541A1 (de) * 1995-09-09 1997-03-13 Volkswagen Ag Verfahren zum Herstellen einer Lageranordnung in einem Zylinderkopf einer Brennkraftmaschine
DE19640719C1 (de) 1996-10-02 1997-10-16 Iav Motor Gmbh Lagerbett für die Kurbelwellenlagerung von Verbrennungsmotoren
AT3760U1 (de) 1999-08-19 2000-07-25 Avl List Gmbh Zylinder-kurbelgehäuse für eine brennkraftmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089735A (en) * 1960-06-02 1963-05-14 Fuchs Kg Otto Reciprocable combustion engine
DE2643628A1 (de) * 1975-10-09 1977-04-14 Fiat Veicoli Ind V-verbrennungsmotor
FR2508995A1 (fr) * 1981-07-03 1983-01-07 Ford France Support pour arbres a cames et procede de montage de l'arbre dans ce support
EP0088157A1 (fr) * 1982-03-09 1983-09-14 Klöckner-Humboldt-Deutz Aktiengesellschaft Culasse pour un moteur à combustion interne, refroidi par eau
WO2001019549A1 (fr) * 1999-09-13 2001-03-22 Federal-Mogul Corporation Roulement de liaison et procede de fabrication correspondant

Also Published As

Publication number Publication date
DE102007017025A1 (de) 2008-10-16

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