EP2225452A1 - Couvercle de culasse - Google Patents

Couvercle de culasse

Info

Publication number
EP2225452A1
EP2225452A1 EP08866659A EP08866659A EP2225452A1 EP 2225452 A1 EP2225452 A1 EP 2225452A1 EP 08866659 A EP08866659 A EP 08866659A EP 08866659 A EP08866659 A EP 08866659A EP 2225452 A1 EP2225452 A1 EP 2225452A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
head cover
camshaft
bearing
connecting element
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
EP08866659A
Other languages
German (de)
English (en)
Other versions
EP2225452B1 (fr
Inventor
Robert Dunsch
Edwin Hartmann
Michael Kreisig
Stefan Ruppel
Jan Scheffel
Falk Schneider
Markus Walch
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 EP2225452A1 publication Critical patent/EP2225452A1/fr
Application granted granted Critical
Publication of EP2225452B1 publication Critical patent/EP2225452B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • 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
    • F01L2001/0535—Single overhead camshafts [SOHC]
    • 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 cover with a bearing device for supporting a camshaft in a cylinder head.
  • the invention also relates to an engine equipped with such a cylinder head cover.
  • a camshaft In today's internal combustion engines, basically two different arrangements of a camshaft have prevailed on a cylinder head.
  • the camshaft is received between the cylinder head and a so-called bearing frame, on which a corresponding number of screws a mostly made of plastic cylinder head cover is screwed.
  • a storage lane is formed by a respective bearing half shell in the cylinder head and in the bearing frame. The storage lane must be machined in the assembled state, marked and then dismantled to install the camshaft again.
  • this effort is faced with a number of assembly advantages, for example, the cylinder head can be set and bolted with associated bearing frame and staggered camshaft as a unit on the cylinder block.
  • the camshaft is already subjected to the forces of valve springs and kept in position by the stake out, thus enabling a precisely predefined position between crankshaft and camshaft.
  • work is carried out without a bearing frame, that is to say the cylinder head cover, which is made of aluminum, for example. die casting is screwed directly onto the cylinder head.
  • the second variant comes out with significantly fewer parts, which must be expected due to the usually made of metal cylinder head cover with an increased noise emission.
  • the present invention is concerned with the problem of providing a cylinder head cover, with which in particular a simplified camshaft assembly can be achieved on the cylinder head.
  • the invention is based on the general idea, one of at least two bearing a camshaft bearing blocks and connecting element connecting this produced storage facility as a prefabricated assembly and fasten together with a cylinder head cover as a whole in a single step on the cylinder head, without the cam shaft then again would have to be aligned.
  • the bearing device comprises at least the two aforementioned bearing blocks, which support the camshaft and the connecting element, which fixes the bearing blocks in mutually aligned position.
  • the camshaft penetrates the bearing blocks in each case in an axial first passage opening. Due to the design of the bearing device together with the camshaft to be stored as a prefabricated subassembly, this can already be done in an early stage.
  • the assembly consisting of camshaft, bearing blocks and connecting element thus forms an assembly aid for installing the bearing device in the cylinder head.
  • the bearing blocks mentioned above are threaded onto the camshaft in a correspondingly predefined distance and then aligned with respect to the camshaft.
  • the connecting element is formed of metal and welded to the bearing blocks.
  • a connecting element a rigid sheet metal can be used, the rigidity of which is so great that bending and thus a bearing inaccuracy of the individual bearing blocks with respect to the camshaft can be reliably avoided.
  • the welding between the bearing blocks and the connecting element can be carried out via procedurally simple to produce stapling points, which simultaneously ensure a secure and reliable fixation of the bearing blocks on the connecting element.
  • At least one bearing block is expediently provided with at least one second passage opening extending transversely to the first passage opening for the camshaft, which is aligned with a third passage opening arranged in the connecting element and which is designed to pass a screw defining the bearing device and thus the camshaft on the cylinder head.
  • the inventive arrangement of the different through holes allows simultaneous fixing of the connecting element, the associated bearing block and thus the camshaft on the cylinder head with compared to the prior art few screws, which can be significantly reduce in particular the variety of parts and thus the installation effort.
  • a separate fastening of a lower bearing shell and a bearing upper shell connected to the respectively separately required fastening means and a late reworking of the bearing shells with mounted camshaft can thus be omitted.
  • latching elements and / or latching contours are provided on the connecting element of the bearing device which the bearing device can be releasably secured together with the camshaft fixed to the cylinder head cover.
  • Such locking elements or latching contours may be formed in the form of clip elements and allow a simple clipping of the cylinder head cover on the bearing device.
  • the unit of cylinder head cover and bearing device together with the camshaft can be simply placed on the cylinder head and connected to it via corresponding fastening means, in particular screwed.
  • the Verclipsung between cylinder head cover and bearing device facilitates in particular the positioning of the two components to each other and the cylinder head and thereby simplifies the assembly process.
  • the locking elements can be molded in a simple manner by injection molding, that is, be made in one piece with the cylinder head cover.
  • the latching elements or the latching contours are arranged on the bearing device or on the cylinder head cover so that an attachment of the bearing device to the cylinder head cover in only one exactly predefined position is possible in which the subsequent assembly of the two components on the cylinder head is easily possible.
  • FIG. 1 shows a cylinder head cover according to the invention with a bearing device
  • 2a is a view of a storage facility
  • FIG. 5 is an illustration of the cylinder head cover with built-in storage device of FIG. 4, but from below, Fig. 6 shows a possible embodiment of a seal for sealing the bearing device relative to the cylinder head cover.
  • a cylinder head cover 1 has a bearing device 2 for mounting a camshaft 3.
  • the bearing device 2 comprises at least two, as shown in FIG. 1, a total of five, bearing blocks 4 and the individual bearing blocks 4 interconnecting connecting element 5.
  • the individual bearing blocks 4 have a first passage opening 6 through which the camshaft 3, which, for example, as a built Camshaft may be formed, is passed.
  • cams 7 are lined up in a conventional manner and rotatably connected to the camshaft 3.
  • the bearing blocks 4 together with the connecting element 5 and the camshaft 3 a prefabricatable assembly, which is mounted together with the cylinder head cover 1 on a cylinder head, not shown.
  • the prefabricatable assembly consisting of the bearing device 2 and the camshaft 3 is produced according to the invention as follows:
  • the bearing blocks 4 may in principle be made of metal or of light metal, in particular of steel or aluminum, as well as the connecting element 5, wherein a connection between the connecting element 5 and the individual bearing blocks 4 usually takes place via a welded connection.
  • the cylinder head cover 1 is preferably made of plastic.
  • two through holes 8 and 8 'extending transversely to the first through-opening 6 for the camshaft 3 are provided on the bearing blocks 4, said second through-openings 8' and 9 'respectively corresponding thereto and arranged in the connecting element 5 corresponding and disposed in the cylinder head cover 1 fourth through holes 10 and 10 'are aligned so that the bearing device 2 together with the cylinder head cover 1 via corresponding connecting means 11, for example, screws 11, not shown on the cylinder head.
  • the connecting means 11 penetrate the cylinder head cover 1, the Binding element 5 and the respective associated bearing block 4 and are screwed into a bore formed on the cylinder head.
  • one or more, in particular a fifth through-opening 12 may be provided in the connecting element 5, which is formed, for example, for receiving a component, in particular a sensor, not shown.
  • the bearing device 2 can be fixed according to the invention releasably fixed to the cylinder head cover 1 by 5 latching contours 13 are provided, for example, on the connecting element, which cooperate with corresponding and arranged on the cylinder head cover 1 Gegenrastkonturen 14, in particular locking elements 14, (see Fig .. 2a and 3) ,
  • the locking elements 14 are arranged on the connecting element 5 and the corresponding complementary thereto formed locking contours 13 on the cylinder head cover 1.
  • the connecting means 11 are designed as screws 11, in particular as collar screws, and have a hexagon on the end, which simplifies tightening of the screw 11.
  • a decoupling element 15 is additionally provided, which in particular a vibration decoupling between the screw 11 on the one hand and cylinder head cover 1 should cause the other.
  • the decoupling element 15 is additionally designed as a sealing element and thereby prevents a lubricant present in the cylinder head, in particular oil, from escaping.
  • FIG. 2a so clearly the bearing device 2 with a total of five not shown camshaft bearing bearing blocks 4 can be seen.
  • the bearing device 2 is thereby inserted into the cylinder head cover 1 in a completely assembled state, ie together with the camshaft 3, from above, which has a corresponding opening 16 for this purpose.
  • the bearing device 2 rests against an opening edge 18 of the opening 16 via a preferably circumferential edge 17, wherein the locking elements 14 shown in FIG. 2b fix the bearing device 2 in an exactly predefined position on the cylinder head cover 1.
  • a cylinder head cover 1 is shown, in which the bearing device 2 is supported exclusively on the edge 17, which is stepped, at an opening edge 18 of the cylinder head cover 1.
  • the step in the edge 17 causes an alignment of the bearing device 2 on the cylinder head cover 1.
  • An additional fixation via locking element 14 and locking contours 13 is not provided in this embodiment, but optionally possible.
  • the screws 11 penetrate the connecting element 5 of the bearing device 2, which at the same time forms an upper end of the cylinder head cover 1. With their end facing away from the screw head 19, the screws 11 penetrate the individual bearing blocks 4 and protrude as far down from the bearing blocks 4 that they can be screwed into corresponding screw-in openings provided on the cylinder head (cf., Fig. 5). Also in the embodiments shown in FIGS. 4 and 5, a subsequent alignment of the individual bearing blocks 4 with respect to the camshaft 3 is not required, since they are already aligned over the connecting element 5 to each other and the cylinder head cover 1.
  • a possible embodiment of a seal 20 is shown in the manner of a sealing frame, whereby a leakage of oil from the cylinder head reliably prevented can be.
  • the screws 11 may be formed, for example, as expansion screws, which results in a corresponding rigidity during assembly by a direct metallic contact between the screw 11 on the one hand and the cylinder head.
  • the fourth through-openings 10 and 10 'in the cylinder head cover 1 are enclosed by the decoupling element 15 designed as a sealing element in such a way that a preferably complete acoustic decoupling between the cylinder head and the cylinder head cover 1 results.
  • the screws 11 as shown in FIG.
  • the collar 21 of the screws 11 thus presses on the decoupling element 15 and, via the latter, on the cylinder head cover 1, which corresponds to a force 20 '(see FIG ) passes against the cylinder head.
  • a separate fastening of the cylinder head cover 1 and the bearing blocks 4 omitted on the cylinder head and both elements together via the same screws 11 can be fixed. This reduces the variety of parts and logistics costs. In particular, however, a time-consuming reworking or readjustment of the individual bearing blocks 4 can be omitted since these are already fixed and aligned with one another via the connecting element 5.

Landscapes

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

Abstract

L'invention concerne un couvercle de culasse (1) avec un ensemble palier (2) pour le montage d'un arbre à cames (3), sachant : que l'ensemble palier (2) présente au moins deux supports de palier (4) recevant l'arbre à cames (3), et un élément de liaison (5) ; que les supports de palier (4) sont traversés axialement par l'arbre à cames à monter (3) dans une première ouverture de passage (6), et sont fixés en position mutuellement alignée au moyen de l'élément de liaison (5) ; et que les supports de palier (4) forment conjointement avec l'élément de liaison (5) et l'arbre à cames (3) un sous-ensemble pouvant être préfabriqué, qui peut être monté conjointement avec le couvercle de culasse (1) sur la culasse.
EP08866659.9A 2007-12-31 2008-10-20 Couvercle de culasse Not-in-force EP2225452B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007063254A DE102007063254A1 (de) 2007-12-31 2007-12-31 Zylinderkopfhaube
PCT/EP2008/064114 WO2009083287A1 (fr) 2007-12-31 2008-10-20 Couvercle de culasse

Publications (2)

Publication Number Publication Date
EP2225452A1 true EP2225452A1 (fr) 2010-09-08
EP2225452B1 EP2225452B1 (fr) 2016-09-28

Family

ID=40152730

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08866659.9A Not-in-force EP2225452B1 (fr) 2007-12-31 2008-10-20 Couvercle de culasse

Country Status (6)

Country Link
US (1) US9175636B2 (fr)
EP (1) EP2225452B1 (fr)
JP (1) JP5342564B2 (fr)
CN (1) CN101918694B (fr)
DE (1) DE102007063254A1 (fr)
WO (1) WO2009083287A1 (fr)

Cited By (1)

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WO2019029963A1 (fr) * 2017-08-07 2019-02-14 Mahle International Gmbh Module comprenant un couvre-culasse et un palier d'arbre à cames, assemblage du module avec une culasse de cylindre et procédé de réalisation de cet assemblage

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CN106704025A (zh) * 2016-12-09 2017-05-24 江苏四达动力机械集团有限公司 一种顶置凸轮高速柴油机多功能罩结构
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WO2021130726A1 (fr) * 2019-12-24 2021-07-01 Fleetguard Filters Private Limited Calotte de cylindre pour moteur à combustion interne
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019029963A1 (fr) * 2017-08-07 2019-02-14 Mahle International Gmbh Module comprenant un couvre-culasse et un palier d'arbre à cames, assemblage du module avec une culasse de cylindre et procédé de réalisation de cet assemblage

Also Published As

Publication number Publication date
CN101918694B (zh) 2012-11-14
US9175636B2 (en) 2015-11-03
WO2009083287A1 (fr) 2009-07-09
DE102007063254A1 (de) 2009-07-02
EP2225452B1 (fr) 2016-09-28
JP5342564B2 (ja) 2013-11-13
CN101918694A (zh) 2010-12-15
JP2011508160A (ja) 2011-03-10
US20110005490A1 (en) 2011-01-13

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