EP2546504B2 - Moteur à combustion - Google Patents

Moteur à combustion Download PDF

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Publication number
EP2546504B2
EP2546504B2 EP12175309.9A EP12175309A EP2546504B2 EP 2546504 B2 EP2546504 B2 EP 2546504B2 EP 12175309 A EP12175309 A EP 12175309A EP 2546504 B2 EP2546504 B2 EP 2546504B2
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EP
European Patent Office
Prior art keywords
cylinder head
intermediate flange
combustion engine
internal combustion
collar
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.)
Active
Application number
EP12175309.9A
Other languages
German (de)
English (en)
Other versions
EP2546504A3 (fr
EP2546504B1 (fr
EP2546504A2 (fr
Inventor
Dimitri An
Thomas Fallscheer
Ulrich Hütter
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
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Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2546504A2 publication Critical patent/EP2546504A2/fr
Publication of EP2546504A3 publication Critical patent/EP2546504A3/fr
Publication of EP2546504B1 publication Critical patent/EP2546504B1/fr
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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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings

Definitions

  • the present invention relates to an internal combustion engine.
  • An internal combustion engine usually includes a cylinder head and a cylinder head cover. Furthermore, an intermediate flange can be arranged between the cylinder head cover and the cylinder head, which forms a separate component with respect to the cylinder head cover and the cylinder head. Components of the internal combustion engine can be arranged in the intermediate flange, for example components of a fuel injection system and/or components of an ignition system.
  • the components accommodated in the intermediate flange can have an increased sensitivity to oscillations and vibrations, which can be introduced into the intermediate flange via the cylinder head, for example. This can impair the long-term functional reliability of these components.
  • DE4009017 discloses an internal combustion engine with an intermediate flange.
  • the present invention deals with the problem of providing an improved or at least a different embodiment for an internal combustion engine of the type mentioned, which is characterized in particular by a reduced vibration load on the intermediate flange or the components accommodated therein.
  • the invention is based on the general idea of decoupling the intermediate flange from vibrations via a first sealing arrangement relative to the cylinder head and via a second sealing arrangement relative to the cylinder head cover.
  • the sealing arrangements are thereby assigned a dual function, since on the one hand they provide the required sealing between the intermediate flange and the cylinder head on the one hand and between the intermediate flange and the cylinder head cover on the other hand and also cause the vibration decoupling between the intermediate flange and the cylinder head on the one hand and between the cylinder head cover and the intermediate flange on the other hand.
  • the invention uses the consideration that elastic materials suitable for the seal can also be suitable for vibration decoupling.
  • the invention further proposes not to attach the intermediate flange directly to the cylinder head, but only indirectly via the cylinder head cover, namely by attaching the cylinder head cover to the cylinder head.
  • at least one collar screw is used, which has a shaft with a threaded section, a head and a collar spaced apart from the head.
  • the respective collar screw is designed in one piece and has its components, i.e. the shaft, the threaded section, the head and the collar, integrally.
  • the threaded section is formed on a first end section of the collar screw, while the head is formed on a second end section of the collar screw.
  • the collar is formed on the shaft and separates the threaded section from a thread-free central section that extends from the collar to the head.
  • the respective collar screw is screwed with the threaded section into a threaded opening formed on the cylinder head, whereby it is supported by the collar on the cylinder head, with its shaft, in particular with its central section, passing through a flange passage opening formed on the intermediate flange and also through a hood passage opening formed on the cylinder head cover extends through and the collar screw is supported with its head on the cylinder head cover.
  • the respective collar screw clamps the cylinder head cover to the cylinder head through the intermediate flange, with the cylinder head cover being supported in a pre-stressed manner on the cylinder head via the intermediate flange.
  • the collar is expediently supported directly and/or rigidly on the cylinder head. This achieves a rigid fixation of the collar screw on the cylinder head.
  • the head can be supported directly and/or rigidly on the cylinder head cover in order to generate direct power transmission here too.
  • an indirect support on the cylinder head cover is preferred for the head, namely via an elastic element, for example an elastomer disk, in order to also decouple the support of the head on the cylinder head cover with regard to vibrations.
  • the intermediate flange is supported, in particular exclusively, indirectly, namely elastically via the elastic first sealing arrangement on the cylinder head.
  • the cylinder head cover is also supported, in particular exclusively, indirectly, namely via the elastic second sealing arrangement on the intermediate flange.
  • This elastic support of the intermediate flange on the one hand on the cylinder head and on the other hand on the cylinder head cover improves or enables the desired vibration decoupling of the intermediate flange. It is expedient here if the intermediate flange is not screwed to either the cylinder head or the cylinder head cover, but rather if there is axial play with regard to the screwing direction, so that mobility of the intermediate flange transversely to the screwing direction relative to the cylinder head and relative to the cylinder head cover is basically possible.
  • a distance between the cylinder head and the cylinder head cover can be greater than a height of the intermediate flange.
  • the intermediate flange is centered axially, i.e. parallel to the assembly direction or screwing direction, via the elastic sealing arrangements between the cylinder head and the cylinder head cover and is elastically mounted via the sealing arrangements on the cylinder head and on the cylinder head cover.
  • the collar is positioned on the respective collar screw in such a way that when installing the collar screw can be screwed with the collar against the cylinder head on the block, so that the desired distance between the cylinder head cover is then automatically achieved and cylinder head is adjusted.
  • the first sealing arrangement is expediently formed by a single first seal which runs closed along the intermediate flange.
  • the second sealing arrangement can be formed by a single second seal which runs closed along the intermediate flange.
  • the first seal and the second seal can be identical in construction. The closed circumferential seals simplify assembly and result in an efficient seal between the cylinder head and cylinder flange on the one hand and between the cylinder head cover and intermediate flange on the other.
  • a corresponding, groove-shaped receiving chamber can be formed for the first seal on the intermediate flange or on the cylinder head.
  • a corresponding groove-shaped receiving chamber can be formed for the second seal on the cylinder flange or on the cylinder head cover.
  • the respective seal expediently separates an inside of the intermediate flange from an outside of the intermediate flange.
  • the respective collar screw is expediently arranged on the outside, so that the encapsulation of the interior and thus the sealing of the interior is not impaired by the flange through opening.
  • At least one securing area can be provided in which the intermediate flange is secured exclusively on the cylinder head.
  • This lock is designed to hold the intermediate flange on the cylinder head when the collar bolts are removed, so that the cylinder head cover can be removed while the intermediate flange can remain on the cylinder head.
  • the fuse is also designed so that it does not affect the vibrational end coupling of the intermediate flange from the cylinder head. This can be ensured, for example, by appropriate play axially and radially with respect to the mounting direction.
  • such a security can be realized using a screw connection, which creates a firm connection between the intermediate flange and the cylinder head, but has sufficient axial play and radial play that, in the assembled state, it can be used to tension the sealing arrangements between the cylinder head cover and the intermediate flange or between the intermediate flange and the cylinder head does not contribute.
  • the sealing arrangements advantageously act axially, i.e. parallel to the assembly direction or screwing direction.
  • Fig. 1 to 3 comprises an internal combustion engine 1, only partially shown here, which can be used in particular in a motor vehicle, a cylinder head 2, a cylinder head cover 3 and an intermediate flange 4.
  • the individual components are arranged one on top of the other with respect to an assembly direction 5 indicated by a double arrow, whereby the Intermediate flange 4 is arranged axially between the cylinder head 2 and the cylinder head cover 3 with respect to the mounting direction 5.
  • the intermediate flange 4 also forms a separate component with respect to the cylinder head cover 3 and with respect to the cylinder head 2.
  • collar screws 6 are provided, which are arranged distributed along the circumferential contour of the intermediate flange 4 or the cylinder head 3.
  • the collar screws 6 are screwed parallel to the mounting direction 5, so that one screwing direction corresponds to the mounting direction 5, so that the screwing direction can also be referred to as 5 below.
  • the respective collar screw 6 has a shaft 7 which extends coaxially to a longitudinal central axis 8 of the collar screw 6, the longitudinal central axis 8 running parallel to the screwing direction 5 in the assembled state. Furthermore, the collar screw 6 comprises a threaded section 9, a head 10 and a collar 11, which is spaced from the head 10 and in particular separates the threaded section 9 from the rest of the shaft 7.
  • first sealing arrangement 12 is arranged between the cylinder head 2 and the intermediate flange 4.
  • the first sealing arrangement 12 is designed as an axial seal and accordingly acts axially, i.e. parallel to the screwing direction 5 or assembly direction 5.
  • the second sealing arrangement 13 is arranged between the cylinder head cover 3 and the intermediate flange 4.
  • the second sealing arrangement 13 is also designed here as an axial seal, so that it also acts axially, i.e. parallel to the mounting direction 5.
  • the respective collar screw 6 is screwed with the threaded section 9 into a threaded opening 14 which is formed on the cylinder head 2. Furthermore, the collar screw 6 is supported with its collar 11 on the cylinder head 2, namely on an opening edge 15 enclosing the threaded opening 14, axially, i.e. directly parallel to the longitudinal center axis 8 of the screw.
  • the shaft 7 passes through a flange through-opening 16, which is formed in the intermediate flange 4, and a hood through-opening 17, which is formed in the cylinder head cover 3.
  • the head 10 is supported axially indirectly on the cylinder head cover 3. While the collar 11 is supported rigidly and directly on the cylinder head 2, the head 10 is expediently supported indirectly on the cylinder head cover 3 via an elastic, disk-shaped element 18.
  • the elastic element 18 can absorb vibrations.
  • such an elastic element 18 can be dispensed with.
  • vibrations from the cylinder head 2 can be transmitted to the cylinder head cover 3 via the respective collar screw 6.
  • this vibration transmission can be negligible due to the comparatively small contact points between the cylinder head cover 3 and the respective screw head 10.
  • the collar screws 6 are designed so that they do not cause any blocking between the intermediate flange 4 and the cylinder head 2 on the one hand and between the intermediate flange 4 and the cylinder head cover 3 on the other hand, so that the intermediate flange 4 does not directly axially touch either the cylinder head 2 or the cylinder head cover 3.
  • Both sealing arrangements 12, 13 are expediently designed to be elastic, so that the intermediate flange 4 is supported elastically on both the cylinder head 2 and the cylinder head cover 3.
  • the first sealing arrangement 12 is preferably formed by a single first seal which runs closed along the intermediate flange 4 and is also designated 12 below.
  • the second sealing arrangement 13 is also expediently formed by a single second seal which runs closed along the intermediate flange 4 and is also designated 13 below.
  • the first seal 12 is chambered on the intermediate flange 4 and is axially supported on the top 21 of the cylinder head 2.
  • the second seal 13 in the example is chambered on the cylinder head cover 3 and is axially supported on the top 24 of the intermediate flange 4.
  • the seals 12, 13 are arranged so that they separate an inside 25 of the intermediate flange 4 from an outside 26 of the intermediate flange 4. It is noteworthy that the collar screws 6 are arranged on the outside 26. Accordingly, the flange through openings 16 also extend through the outside 26 of the connecting flange 4, which considerably simplifies the sealing of the inside 25 of the connecting flange 4.
  • FIG. 1 A locking screw, not shown here, can be arranged in an area 27, with the help of which the intermediate flange 4 can be secured on the cylinder head 2.
  • the area 27 is therefore also referred to below as the security area 27.
  • several such securing areas 27 can be provided along the circumference of the intermediate flange 4.
  • the screwing takes place in such a way that the vibration decoupling and thus in particular the elasticity and mobility between the intermediate flange 4 and the cylinder head 2 are not hindered. This can be achieved by appropriate axial and radial play of the screw connection in the respective securing area 27.

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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)

Claims (13)

  1. Moteur à combustion interne, en particulier pour un véhicule automobile,
    - avec une tête de cylindre (2),
    - avec un capot de tête de cylindre (3),
    - avec une bride intermédiaire (4), qui est agencée entre la tête de cylindre (2) et le capot de tête de cylindre (3) et qui est un composant séparé par rapport au capot de tête de cylindre (3) et à la tête de cylindre (2),
    - avec au moins une vis à collet (6) pour fixer le capot de tête de cylindre (3) et la bride intermédiaire (4) sur la tête de cylindre (2), qui présente une tige (7) avec un tronçon fileté (9), une tête (10) et à distance de la tête (10) un collet (11),
    - avec un premier aménagement d'étanchéité (12), qui est agencé entre la tête de cylindre (2) et la bride intermédiaire (4),
    - avec un deuxième aménagement d'étanchéité (13), qui est agencé entre le capot de tête de cylindre (3) et la bride intermédiaire (4),
    - dans lequel la vis à collet (6) respective est vissée avec le tronçon fileté (9) dans une ouverture filetée (14) réalisée au niveau de la tête de cylindre (2), traverse avec la tige (7) une ouverture de passage de bride (16) réalisée au niveau de la bride intermédiaire (4) et une ouverture de passage de capot (17) réalisée au niveau du capot de tête de cylindre (3) et est soutenue avec la tête (10) au niveau du capot de tête de cylindre (3),
    - dans lequel le capot de tête de cylindre (3) est soutenu de manière élastique indirectement par le biais du deuxième aménagement d'étanchéité élastique (13) au niveau de la bride intermédiaire (4), caractérisé en ce
    - que la vis à collet (6) respective est soutenue avec le collet (11) au niveau de la tête de cylindre (2),
    - que la bride intermédiaire (4) est soutenue de manière élastique indirectement par le biais du premier aménagement d'étanchéité élastique (12) au niveau de la tête de cylindre (2).
  2. Moteur à combustion interne selon la revendication 1,
    caractérisé en ce
    que le collet (11) est soutenu directement et/ou de manière rigide au niveau de la tête de cylindre (2).
  3. Moteur à combustion interne selon la revendication 1 ou 2,
    caractérisé en ce
    - que la tête (10) est soutenue directement et/ou de manière rigide au niveau du capot de tête de cylindre (3), ou
    - que la tête (10) est soutenue de manière rigide et/ou élastique indirectement par le biais d'un élément rigide ou élastique (18) au niveau du capot de tête de cylindre (3).
  4. Moteur à combustion interne selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce
    qu'à l'état monté dans la direction de montage (5), une distance (19) entre la tête de cylindre (2) et le capot de tête de cylindre (3) est supérieure à une hauteur (22) de la bride intermédiaire (4).
  5. Moteur à combustion interne selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce
    - que le premier aménagement d'étanchéité est formé par un premier joint d'étanchéité (12) unique périphérique fermé le long de la bride intermédiaire (4), et/ou
    - que le deuxième aménagement d'étanchéité est formé par un deuxième joint d'étanchéité (13) unique périphérique fermé le long de la bride intermédiaire (4).
  6. Moteur à combustion interne selon la revendication 5,
    caractérisé en ce
    - que le premier joint d'étanchéité (12) est chambré au niveau de la bride intermédiaire (4) ou au niveau de la tête de cylindre (2), et/ou
    - que le deuxième joint d'étanchéité (13) est chambré au niveau du capot de tête de cylindre (3) ou au niveau de la bride intermédiaire (4).
  7. Moteur à combustion interne selon la revendication 5 ou 6,
    caractérisé en ce
    que le joint d'étanchéité (12, 13) respectif sépare un côté intérieur (25) de la bride intermédiaire (4) d'un côté extérieur (26) de la bride intermédiaire (4), dans lequel la vis à collet (6) respective est agencée au niveau du côté extérieur (26).
  8. Moteur à combustion interne selon l'une quelconque des revendications 1 à 7, avec au moins une zone de sécurité (27), dans lequel la bride intermédiaire (4) est sécurisée au niveau de la tête de cylindre (2).
  9. Moteur à combustion interne selon la revendication 8,
    caractérisé en ce
    que la bride intermédiaire (4) au niveau de la tête de cylindre (2) est fixée dans la zone de sécurité (27), même si toutes les vis à collet (6) sont retirées et que le capot de tête de cylindre (3) est retirable de la bride intermédiaire (4).
  10. Moteur à combustion interne selon la revendication 8 ou 9,
    caractérisé en ce
    qu'un jeu radial et axial par rapport à la direction de montage (5) entre la bride intermédiaire (4) et la tête de cylindre (2) est prévue dans la zone de sécurité (27).
  11. Moteur à combustion interne selon l'une quelconque des revendications 1 à 10,
    caractérisé en ce
    que la vis à collet respective (6) est réalisée d'un seul tenant et présente intégralement la tige (7), le tronçon fileté (9), la tête (10) et le collet (11).
  12. Moteur à combustion interne selon la revendication 11,
    caractérisé en ce
    que le tronçon fileté (9) est réalisé au niveau d'un premier tronçon d'extrémité de la vis à collet (6), pendant que la tête (10) est réalisée au niveau d'un deuxième tronçon d'extrémité de la vis à collet (6).
  13. Moteur à combustion interne selon l'une quelconque des revendications 1 à 12,
    caractérisé en ce
    que le collet (11) est réalisé au niveau de la tige (7) et y sépare le tronçon fileté (9) d'un tronçon central non fileté, qui s'étend du collet (11) à la tête (10).
EP12175309.9A 2011-07-14 2012-07-06 Moteur à combustion Active EP2546504B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011079166A DE102011079166A1 (de) 2011-07-14 2011-07-14 Brennkraftmaschine

Publications (4)

Publication Number Publication Date
EP2546504A2 EP2546504A2 (fr) 2013-01-16
EP2546504A3 EP2546504A3 (fr) 2015-01-21
EP2546504B1 EP2546504B1 (fr) 2018-10-03
EP2546504B2 true EP2546504B2 (fr) 2023-12-06

Family

ID=46466266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12175309.9A Active EP2546504B2 (fr) 2011-07-14 2012-07-06 Moteur à combustion

Country Status (3)

Country Link
EP (1) EP2546504B2 (fr)
CN (1) CN202991257U (fr)
DE (1) DE102011079166A1 (fr)

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DE102018133460A1 (de) * 2018-12-21 2020-06-25 Elringklinger Ag Abdeckungseinheit
CN110284992B (zh) * 2019-06-21 2020-12-29 浙江博弈科技股份有限公司 一种气缸盖罩的减振防松型连接结构
WO2021130725A1 (fr) * 2019-12-24 2021-07-01 Fleetguard Filters Private Limited Couvercle de cylindre pour moteur à combustion interne
DE102021201823A1 (de) * 2021-02-26 2022-09-01 Mahle International Gmbh Zylinderkopfhaube

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Also Published As

Publication number Publication date
DE102011079166A1 (de) 2013-01-17
EP2546504A3 (fr) 2015-01-21
EP2546504B1 (fr) 2018-10-03
CN202991257U (zh) 2013-06-12
EP2546504A2 (fr) 2013-01-16

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