EP2546504B1 - Internal combustion engine - Google Patents
Internal combustion engine Download PDFInfo
- Publication number
- EP2546504B1 EP2546504B1 EP12175309.9A EP12175309A EP2546504B1 EP 2546504 B1 EP2546504 B1 EP 2546504B1 EP 12175309 A EP12175309 A EP 12175309A EP 2546504 B1 EP2546504 B1 EP 2546504B1
- Authority
- 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.)
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- 238000002485 combustion reaction Methods 0.000 title claims description 25
- 238000007789 sealing Methods 0.000 claims description 18
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
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 comprises a cylinder head and a cylinder head cover. Furthermore, an intermediate flange may 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 may 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 vibrations and vibrations which, for example, can be introduced into the intermediate flange via the cylinder head. This can affect the long-term reliability of these components.
- DE4009017 discloses an internal combustion engine having an intermediate flange.
- the present invention is concerned with the problem of providing for an internal combustion engine of the type mentioned an improved or at least another embodiment, which is characterized in particular by a reduced vibration load of the intermediate flange or the components housed therein.
- the invention is based on the general idea of decoupling the intermediate flange relative to the cylinder head via a first sealing arrangement relative to the cylinder head and via a second sealing arrangement relative to the cylinder head cover.
- the seal assemblies is characterized assigned a dual function, since on the one hand cause the required seal between the flange and cylinder head on the one hand and between the intermediate flange and cylinder head cover and also cause the vibration decoupling between the intermediate flange and cylinder head on the one hand and between the cylinder head cover and flange on the other.
- the invention uses the consideration that elastic materials suitable for the seal can simultaneously also be suitable for vibration decoupling.
- the invention also proposes not to attach the intermediate flange directly to the cylinder head, but only indirectly via the cylinder head cover, namely by fastening the cylinder head cover to the cylinder head.
- at least one collar screw is used which has a shaft with a threaded portion, a head and spaced from the head a collar.
- the respective collar screw is formed in one piece and has its components, ie the shaft, the threaded portion, the head and the collar, integrally.
- the threaded portion is formed at a first end portion of the collar screw, while the head is formed at a second end portion of the collar screw.
- the collar is formed on the shaft and there separates the threaded portion of a thread-free central portion extending from the collar to the head.
- the respective collar screw with the threaded portion is screwed into a threaded opening formed on the cylinder head, wherein it is supported with the collar on the cylinder head, wherein it forms with its shaft, in particular with its central portion, by a formed on the intermediate flange Flansch matsö réelle and also extends through a formed on the cylinder head cover hood passage opening therethrough and wherein the collar screw is supported with its head on the cylinder head cover.
- the respective collar screw clamps the cylinder head cover through the intermediate flange with the cylinder head, whereby the cylinder head cover is biased by the intermediate flange on the cylinder head.
- a plurality of such collar bolts are provided, which are arranged distributed along the peripheral contour of the cylinder head cover and the intermediate flange.
- the federal government is directly and / or rigidly supported on the cylinder head.
- a rigid fixation of the collar screw is achieved on the cylinder head.
- the head can be supported directly and / or rigidly on the cylinder head cover in order to produce a direct power transmission here as well.
- preferred for the head is an indirect support on the cylinder head cover, namely an elastic element, such as an elastomeric disc to decouple the support of the head on the cylinder head cover with respect 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 in particular exclusively, indirectly, namely elastically supported by the elastic second seal assembly on the intermediate flange.
- the desired vibration decoupling of the intermediate flange is improved or made possible. It is useful here, when the intermediate flange is bolted to neither the cylinder head nor with the cylinder head cover, but if respect.
- the Verschraubungsraum an axial clearance remains, so in principle a mobility of the intermediate flange transverse to the screwing relative to the cylinder head and relative to the cylinder head cover is possible.
- a distance between the cylinder head and the cylinder head cover may be greater than a height of the intermediate flange.
- the intermediate flange is centered axially over the elastic sealing arrangements between the cylinder head and the cylinder head cover, that is to say parallel to the mounting direction or screwing direction, and is mounted elastically via the seal arrangements on the cylinder head and on the cylinder head cover.
- the collar is positioned on the respective collar bolt in such a way that when mounting the collar bolt can be bolted to the collar against the cylinder head block, so then automatically the desired distance between the cylinder head cover and cylinder head is set.
- the first seal assembly is formed by a single, closed along the intermediate flange circumferential first seal.
- the second seal arrangement may be formed by a single, second closed around the intermediate flange second seal.
- the first seal and the second seal may be identical. The closed circumferential seals simplify assembly and result in an efficient seal between the cylinder head and the cylinder flange on the one hand and between the cylinder head cover and the intermediate flange on the other hand.
- a corresponding, groove-shaped receiving chamber may be formed for the first seal on the intermediate flange or on the cylinder head.
- a corresponding groove-shaped receiving chamber may be formed for the second seal on the cylinder flange or on the cylinder head cover.
- the respective seal expediently separates an inner side of the intermediate flange from an outer side of the intermediate flange.
- the respective collar screw is arranged on the outside, whereby the encapsulation of the interior and thus the sealing of the interior is not affected by the Flansch thoroughlygangsö Maschinentechnisch.
- At least one securing region may be provided, in which the intermediate flange is secured exclusively on the cylinder head.
- This fuse is designed so that it holds the intermediate flange on the cylinder head with removed collar bolts, 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 vibratory end coupling of the intermediate flange of the cylinder head. This can be ensured, for example, by appropriate clearance axially and radially with respect to the mounting direction.
- such a fuse can be realized by means of a screw which, although it produces a firm connection between the intermediate flange and the cylinder head, but has sufficient axial play and radial play that they in the assembled state for clamping the seal assemblies between the cylinder head cover and the intermediate flange or between the Intermediate flange and the cylinder head does not contribute.
- the respective rigidly connected to the cylinder head collar screw itself can initiate no vibrations in the intermediate flange, a sufficient radial clearance is provided at least between the channel passage opening and the collar screw.
- a corresponding radial play is provided for collar screw in the screw through hole to improve there in conjunction with the aforementioned elastic element a vibration decoupling between the cylinder head cover and collar screw.
- the sealing arrangements advantageously act in each case axially, ie, parallel to the mounting direction or screwing direction.
- Fig. 1 to 3 includes a here only partially shown internal combustion engine 1, which may 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 with respect to.
- the mounting direction 5 is arranged axially between the cylinder head 2 and the cylinder head cover 3.
- the intermediate flange 4 forms a separate component with respect to the cylinder head cover 3 and with respect to the cylinder head 2.
- a plurality of collar bolts 6 are provided which are distributed along the peripheral contour of the intermediate flange 4 and the cylinder head 3, respectively.
- the collar bolts 6 are screwed parallel to the mounting direction 5, so that a screwing the mounting direction 5 corresponds, so that in the following also the screwing can be designated 5.
- the respective collar screw 6 has a shank 7, which extends coaxially to a longitudinal center axis 8 of the collar screw 6, wherein the longitudinal center axis 8 in the mounted state is parallel to the screw 5. Furthermore, the collar screw 6 comprises a threaded portion 9, a head 10 and a collar 11, which is spaced from the head 10 and in particular the threaded portion 9 from the remaining shaft 7 separates.
- first seal assembly 12 For the assembly of the cylinder head cover 3 and the intermediate flange 4 on the cylinder head 2, two seal assemblies, namely a first seal assembly 12 and a second seal assembly 13 are also provided.
- the first sealing arrangement 12 is arranged between the cylinder head 2 and the intermediate flange 4.
- the first seal assembly 12 is designed as an axial seal and acts accordingly axially, ie parallel to the screw 5 and mounting direction 5.
- the second seal assembly 13 is disposed between the cylinder head cover 3 and the intermediate flange 4.
- the second seal assembly 13 is also designed here as an axial seal, so that it also acts axially, ie parallel to the mounting direction 5.
- the respective collar screw 6 is screwed to the threaded portion 9 in 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 at an opening 14 enclosing the threaded opening opening edge 15 axially, ie parallel to the screw longitudinal center axis 8 directly from.
- the shaft 7 passes through a Flansch thoroughlygangsö réelle 16, which is formed in the intermediate flange 4, and a hood passage opening 17, which is formed in the cylinder head cover 3.
- the head 10 is supported in the example shown indirectly indirectly on the cylinder head cover 3 from. While the collar 11 is supported rigidly and directly on the cylinder head 2, the head 10 is expediently indirectly supported on the cylinder head cover 3 via an elastic disk-shaped element 18.
- the elastic member 18 can absorb vibrations.
- such an elastic element 18 may be dispensed with.
- vibrations from the cylinder head 2 via the respective collar screw 6 can be transferred to the cylinder head cover 3.
- this vibration transmission can be negligible in certain designs due to the relatively small contact points between the cylinder head cover 3 and the respective screw head 10.
- the collar bolts 6 are designed so that they cause no interlock 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 thus touches neither the cylinder head 2 nor the cylinder head cover 3 directly axially.
- This is achieved by indirectly supporting the intermediate flange 4 indirectly on the cylinder head cover 3 via the first sealing arrangement 12 indirectly on the cylinder head 2 and via the second sealing arrangement 13.
- both seal assemblies 12,13 are designed to be elastic, so that the intermediate flange 4 is elastically supported both on the cylinder head 2 and on the cylinder head cover 3.
- the vote of the collar bolts 6 on the associated components of the internal combustion engine 1, ie cylinder head 2, cylinder head cover 3 and intermediate flange 4, is suitably such that a measured in the mounting direction 5 distance 19 between the cylinder head 2 facing bottom 20 of the cylinder head cover 3 and a the cylinder head cover 3 facing top 21 of the cylinder head 2 is greater than a height 22 of the intermediate flange 4, which is measured in the mounting direction 5 between the cylinder head 2 facing bottom 23 of the intermediate flange 4 and a cylinder head cover 3 facing top 24 of the intermediate flange 4.
- Due to the elasticities of the two seal assemblies 12,13 of the intermediate flange. 4 axially centered between the cylinder head 2 and the cylinder head cover 3.
- the intermediate flange 4 by the elastic seal assemblies 12,13 axially and transversely thereto, so stored radially elastic and movable on the cylinder head 2 and on the cylinder head cover 3.
- the first sealing arrangement 12 is preferably formed by a single first seal, which runs closed around the intermediate flange 4 and which is also referred to below as 12.
- the second seal assembly 13 is formed by a single, closed along the intermediate flange 4 circumferential second seal, which is also referred to below with 13.
- the first seal 12 is chambered in the example shown on the intermediate flange 4 and axially supported on the upper side 21 of the cylinder head 2.
- the second seal 13 is chambered in the example on the cylinder head cover 3 and axially supported on the upper side 24 of the intermediate flange 4.
- the seals 12,13 are arranged so that they separate an inner side 25 of the intermediate flange 4 from an outer side 26 of the intermediate flange 4. It is noteworthy that the collar screws 6 are arranged on the outside 26. Accordingly, the Flansch thoroughlygangsö réelleen 16 also extend through the outer side 26 of the connecting flange 4, which significantly simplifies the sealing of the inner side 25 of the connecting flange 4.
- Corresponding Fig. 1 can be arranged in a region 27 a locking screw, not shown here, with the aid of the intermediate flange 4 can be secured to the cylinder head 2.
- the area 27 is therefore also referred to below as the backup area 27. It is clear that a plurality of such securing regions 27 can be provided along the circumference of the intermediate flange 4.
- the screw is done such that the vibration decoupling and thus in particular the elasticity and mobility between the intermediate flange 4 and cylinder head 2 is not hindered. This can be realized by a corresponding axial and radial clearance of the screw in the respective fuse area 27.
Description
Die vorliegende Erfindung betrifft eine Brennkraftmaschine.The present invention relates to an internal combustion engine.
Üblicherweise umfasst eine Brennkraftmaschine einen Zylinderkopf sowie eine Zylinderkopfhaube. Ferner kann ein Zwischenflansch zwischen der Zylinderkopfhaube und dem Zylinderkopf angeordnet sein, der bzgl. der Zylinderkopfhaube und des Zylinderkopfs ein separates Bauteil bildet. Im Zwischenflansch können Komponenten der Brennkraftmaschine angeordnet sein, bspw. Bestandteile einer Kraftstoffeinspritzanlage und/oder Bestandteile eines Zündsystems.Typically, an internal combustion engine comprises a cylinder head and a cylinder head cover. Furthermore, an intermediate flange may 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 may be arranged in the intermediate flange, for example components of a fuel injection system and / or components of an ignition system.
Die im Zwischenflansch untergebrachten Komponenten können eine erhöhte Empfindlichkeit gegenüber Schwingungen und Vibrationen aufweisen, die bspw. über den Zylinderkopf in den Zwischenflansch eingeleitet werden können. Hierdurch kann die dauerhafte Funktionssicherheit dieser Komponenten beeinträchtigt werden.The components accommodated in the intermediate flange can have an increased sensitivity to vibrations and vibrations which, for example, can be introduced into the intermediate flange via the cylinder head. This can affect the long-term reliability of these components.
Die vorliegende Erfindung beschäftigt sich mit dem Problem, für eine Brennkraftmaschine der eingangs genannten Art eine verbesserte oder zumindest eine andere Ausführungsform anzugeben, die sich insbesondere durch eine reduzierte Schwingungsbelastung des Zwischenflansches bzw. der darin untergebrachten Komponenten auszeichnet.The present invention is concerned with the problem of providing for an internal combustion engine of the type mentioned an improved or at least another embodiment, which is characterized in particular by a reduced vibration load of the intermediate flange or the components housed therein.
Dieses Problem wird erfindungsgemäß durch den Gegenstand des unabhängigen Anspruchs gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject of the dependent claims.
Die Erfindung beruht auf dem allgemeinen Gedanken, den Zwischenflansch über eine erste Dichtungsanordnung gegenüber dem Zylinderkopf und über eine zweite Dichtungsanordnung gegenüber der Zylinderkopfhaube schwingungsmäßig zu entkoppeln. Den Dichtungsanordnungen wird dadurch eine Doppelfunktion zugeordnet, da sie einerseits die erforderliche Abdichtung zwischen Zwischenflansch und Zylinderkopf einerseits und zwischen Zwischenflansch und Zylinderkopfhaube andererseits bewirken und außerdem die schwingungsmäßige Entkopplung zwischen Zwischenflansch und Zylinderkopf einerseits sowie zwischen Zylinderkopfhaube und Zwischenflansch andererseits bewirken. Die Erfindung nutzt hierbei die Überlegung, dass für die Dichtung geeignete elastische Materialien gleichzeitig auch zur Schwingungsentkopplung geeignet sein können.The invention is based on the general idea of decoupling the intermediate flange relative to the cylinder head via a first sealing arrangement relative to the cylinder head and via a second sealing arrangement relative to the cylinder head cover. The seal assemblies is characterized assigned a dual function, since on the one hand cause the required seal between the flange and cylinder head on the one hand and between the intermediate flange and cylinder head cover and also cause the vibration decoupling between the intermediate flange and cylinder head on the one hand and between the cylinder head cover and flange on the other. The invention uses the consideration that elastic materials suitable for the seal can simultaneously also be suitable for vibration decoupling.
Damit die Dichtungsanordnungen ihre schwingungsentkoppelnde Wirkung gegenüber dem Zwischenflansch erfüllen können, schlägt die Erfindung ferner vor, den Zwischenflansch nicht unmittelbar am Zylinderkopf zu befestigen, sondern nur mittelbar über die Zylinderkopfhaube, und zwar durch die Befestigung der Zylinderkopfhaube am Zylinderkopf. Hierzu wird zumindest eine Bundschraube verwendet, die einen Schaft mit einem Gewindeabschnitt, einen Kopf und beabstandet zum Kopf einen Bund aufweist. Die jeweilige Bundschraube ist dabei einteilig ausgebildet und weist ihre Bestandteile, also den Schaft, den Gewindeabschnitt, den Kopf und den Bund, integral auf. Dabei ist der Gewindeabschnitt an einem ersten Endabschnitt der Bundschraube ausgebildet, während der Kopf an einem zweiten Endabschnitt der Bundschraube ausgebildet ist. Der Bund ist dabei am Schaft ausgebildet und trennt dort den Gewindeabschnitt von einem gewindefreien Zentralabschnitt, der sich vom Bund bis zum Kopf erstreckt. Im montierten Zustand ist die jeweilige Bundschraube mit dem Gewindeabschnitt in eine am Zylinderkopf ausgebildete Gewindeöffnung eingeschraubt, wobei sie sich mit dem Bund am Zylinderkopf abstützt, wobei sie sich mit ihrem Schaft, insbesondere mit ihrem Zentralabschnitt, durch eine am Zwischenflansch ausgebildete Flanschdurchgangsöffnung und außerdem durch eine an der Zylinderkopfhaube ausgebildete Haubendurchgangsöffnung hindurch erstreckt und wobei sich die Bundschraube mit ihrem Kopf an der Zylinderkopfhaube abstützt. Letztlich verspannt die jeweilige Bundschraube die Zylinderkopfhaube durch den Zwischenflansch hindurch mit dem Zylinderkopf, wobei sich die Zylinderkopfhaube über den Zwischenflansch am Zylinderkopf vorgespannt abstützt.In order for the sealing arrangements to be able to fulfill their vibration-decoupling effect against the intermediate flange, the invention also proposes not to attach the intermediate flange directly to the cylinder head, but only indirectly via the cylinder head cover, namely by fastening the cylinder head cover to the cylinder head. For this purpose, at least one collar screw is used which has a shaft with a threaded portion, a head and spaced from the head a collar. The respective collar screw is formed in one piece and has its components, ie the shaft, the threaded portion, the head and the collar, integrally. In this case, the threaded portion is formed at a first end portion of the collar screw, while the head is formed at a second end portion of the collar screw. The collar is formed on the shaft and there separates the threaded portion of a thread-free central portion extending from the collar to the head. In the assembled state, the respective collar screw with the threaded portion is screwed into a threaded opening formed on the cylinder head, wherein it is supported with the collar on the cylinder head, wherein it forms with its shaft, in particular with its central portion, by a formed on the intermediate flange Flanschdurchgangsöffnung and also extends through a formed on the cylinder head cover hood passage opening therethrough and wherein the collar screw is supported with its head on the cylinder head cover. Ultimately, the respective collar screw clamps the cylinder head cover through the intermediate flange with the cylinder head, whereby the cylinder head cover is biased by the intermediate flange on the cylinder head.
Zweckmäßig sind mehrere derartige Bundschrauben vorgesehen, die entlang der Umfangskontur der Zylinderkopfhaube bzw. des Zwischenflansches verteilt angeordnet sind.Suitably, a plurality of such collar bolts are provided, which are arranged distributed along the peripheral contour of the cylinder head cover and the intermediate flange.
Zweckmäßig ist der Bund unmittelbar und/oder starr am Zylinderkopf abgestützt. Hierdurch wird eine starre Fixierung der Bundschraube am Zylinderkopf erzielt. Der Kopf kann unmittelbar und/oder starr an der Zylinderkopfhaube abgestützt sein, um auch hier eine direkte Kraftübertragung zu erzeugen. Bevorzugt ist für den Kopf jedoch eine mittelbare Abstützung an der Zylinderkopfhaube, nämlich über ein elastisches Element, z.B. eine Elastomerscheibe, um auch die Abstützung des Kopfes an der Zylinderkopfhaube hinsichtlich Schwingungen zu entkoppeln. Erfindungsgemäß stützt sich der Zwischenflansch, insbesondere ausschließlich, mittelbar, nämlich über die elastische erste Dichtungsanordnung am Zylinderkopf elastisch ab. Zusätzlich stützt sich auch die Zylinderkopfhaube, insbesondere ausschließlich, mittelbar, nämlich über die elastische zweite Dichtungsanordnung am Zwischenflansch elastisch ab. Durch diese elastische Abstützung des Zwischenflansches einerseits am Zylinderkopf und andererseits an der Zylinderkopfhaube wird die gewünschte schwingungsmäßige Entkopplung des Zwischenflansches verbessert bzw. ermöglicht. Zweckmäßig ist es hierbei, wenn der Zwischenflansch weder mit dem Zylinderkopf noch mit der Zylinderkopfhaube verschraubt ist, sondern wenn bzgl. der Verschraubungsrichtung ein Axialspiel vorhanden bleibt, sodass grundsätzlich eine Beweglichkeit des Zwischenflansches quer zur Verschraubungsrichtung relativ zum Zylinderkopf sowie relativ zur Zylinderkopfhaube möglich ist.Appropriately, the federal government is directly and / or rigidly supported on the cylinder head. As a result, a rigid fixation of the collar screw is achieved on the cylinder head. The head can be supported directly and / or rigidly on the cylinder head cover in order to produce a direct power transmission here as well. However, preferred for the head is an indirect support on the cylinder head cover, namely an elastic element, such as an elastomeric disc to decouple the support of the head on the cylinder head cover with respect to vibrations. According to the invention, the intermediate flange is supported, in particular exclusively, indirectly, namely elastically via the elastic first sealing arrangement on the cylinder head. In addition, the cylinder head cover, in particular exclusively, indirectly, namely elastically supported by the elastic second seal assembly on the intermediate flange. By 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 the desired vibration decoupling of the intermediate flange is improved or made possible. It is useful here, when the intermediate flange is bolted to neither the cylinder head nor with the cylinder head cover, but if respect. The Verschraubungsrichtung an axial clearance remains, so in principle a mobility of the intermediate flange transverse to the screwing relative to the cylinder head and relative to the cylinder head cover is possible.
Um dies zu erreichen, kann gemäß einer vorteilhaften Ausführungsform im montierten Zustand in der Verschraubungsrichtung bzw. in der Montagerichtung ein Abstand zwischen Zylinderkopf und Zylinderkopfhaube größer sein als eine Höhe des Zwischenflansches. In der Folge ist der Zwischenflansch über die elastischen Dichtungsanordnungen zwischen Zylinderkopf und Zylinderkopfhaube axial, also parallel zur Montagerichtung bzw. Verschraubungsrichtung zentriert und elastisch über die Dichtungsanordnungen am Zylinderkopf und an der Zylinderkopfhaube gelagert. Um diesen Abstand zwischen Zylinderkopf und Zylinderkopfhaube gezielt so einstellen zu können, erfolgt die Positionierung des Bunds an der jeweiligen Bundschraube gezielt so, dass beim Montieren die Bundschraube mit dem Bund gegen den Zylinderkopf auf Block verschraubt werden kann, sodass dann automatisch der gewünschte Abstand zwischen Zylinderkopfhaube und Zylinderkopf eingestellt ist.To achieve this, according to an advantageous embodiment in the mounted state in the screwing direction or in the mounting direction, a distance between the cylinder head and the cylinder head cover may be greater than a height of the intermediate flange. As a result, the intermediate flange is centered axially over the elastic sealing arrangements between the cylinder head and the cylinder head cover, that is to say parallel to the mounting direction or screwing direction, and is mounted elastically via the seal arrangements on the cylinder head and on the cylinder head cover. To be able to set this distance between the cylinder head and the cylinder head cover in a targeted manner, the collar is positioned on the respective collar bolt in such a way that when mounting the collar bolt can be bolted to the collar against the cylinder head block, so then automatically the desired distance between the cylinder head cover and cylinder head is set.
Zweckmäßig ist die erste Dichtungsanordnung durch eine einzige, entlang des Zwischenflansches geschlossen umlaufende erste Dichtung gebildet. Zusätzlich oder alternativ kann die zweite Dichtungsanordnung durch eine einzige, entlang des Zwischenflansches geschlossen umlaufende zweite Dichtung gebildet sein. In einem Sonderfall können die erste Dichtung und die zweite Dichtung baugleich sein. Die geschlossen umlaufenden Dichtungen vereinfachen die Montage und führen zu einer effizienten Abdichtung zwischen Zylinderkopf und Zylinderflansch einerseits sowie zwischen Zylinderkopfhaube und Zwischenflansch andererseits.Suitably, the first seal assembly is formed by a single, closed along the intermediate flange circumferential first seal. Additionally or alternatively, the second seal arrangement may be formed by a single, second closed around the intermediate flange second seal. In a special case, the first seal and the second seal may be identical. The closed circumferential seals simplify assembly and result in an efficient seal between the cylinder head and the cylinder flange on the one hand and between the cylinder head cover and the intermediate flange on the other hand.
Um die Effizienz der jeweiligen Dichtung zu verbessern, kann für die erste Dichtung am Zwischenflansch oder am Zylinderkopf eine entsprechende, nutförmige Aufnahmekammer ausgeformt sein. Ebenso kann für die zweite Dichtung am Zylinderflansch oder an der Zylinderkopfhaube eine entsprechende nutförmige Aufnahmekammer ausgeformt sein.In order to improve the efficiency of the respective seal, a corresponding, groove-shaped receiving chamber may be formed for the first seal on the intermediate flange or on the cylinder head. Likewise, a corresponding groove-shaped receiving chamber may be formed for the second seal on the cylinder flange or on the cylinder head cover.
Die jeweilige Dichtung trennt zweckmäßig eine Innenseite des Zwischenflansches von einer Außenseite des Zwischenflansches. Zweckmäßig ist die jeweilige Bundschraube auf der Außenseite angeordnet, wodurch die Kapselung des Innenraums und somit die Abdichtung des Innenraums durch die Flanschdurchgangsöffnung nicht beeinträchtigt ist.The respective seal expediently separates an inner side of the intermediate flange from an outer side of the intermediate flange. Suitably, the respective collar screw is arranged on the outside, whereby the encapsulation of the interior and thus the sealing of the interior is not affected by the Flanschdurchgangsöffnung.
Bei einer anderen Ausführungsform kann zumindest ein Sicherungsbereich vorgesehen sein, in dem der Zwischenflansch ausschließlich am Zylinderkopf gesichert ist. Diese Sicherung ist dabei so ausgelegt, dass sie bei entfernten Bundschrauben den Zwischenflansch am Zylinderkopf festhält, sodass die Zylinderkopfhaube entfernt werden kann, während der Zwischenflansch am Zylinderkopf verbleiben kann. Die Sicherung ist ferner so ausgelegt, dass sie die schwingungsmäßige Endkopplung des Zwischenflansches vom Zylinderkopf nicht beeinträchtigt. Dies kann bspw. durch entsprechendes Spiel axial und radial bzgl. der Montagerichtung sichergestellt werden. Insbesondere lässt sich eine derartige Sicherung mithilfe einer Verschraubung realisieren, die zwar eine feste Verbindung zwischen dem Zwischenflansch und dem Zylinderkopf herstellt, aber ausreichend Axialspiel und Radialspiel besitzt, dass sie im Montierten Zustand zur Verspannung der Dichtungsanordnungen zwischen der Zylinderkopfhaube und dem Zwischenflansch bzw. zwischen dem Zwischenflansch und dem Zylinderkopf nicht beiträgt.In another embodiment, at least one securing region may be provided, in which the intermediate flange is secured exclusively on the cylinder head. This fuse is designed so that it holds the intermediate flange on the cylinder head with removed collar bolts, 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 vibratory end coupling of the intermediate flange of the cylinder head. This can be ensured, for example, by appropriate clearance axially and radially with respect to the mounting direction. In particular, such a fuse can be realized by means of a screw which, although it produces a firm connection between the intermediate flange and the cylinder head, but has sufficient axial play and radial play that they in the assembled state for clamping the seal assemblies between the cylinder head cover and the intermediate flange or between the Intermediate flange and the cylinder head does not contribute.
Damit die jeweilige mit dem Zylinderkopf starr verbundene Bundschraube selbst keine Schwingungen in den Zwischenflansch einleiten kann, ist zumindest zwischen der Kanaldurchgangsöffnung und der Bundschraube ein ausreichendes Radialspiel vorgesehen. Zweckmäßig ist auch in der Schraubendurchgangsöffnung ein entsprechendes Radialspiel zur Bundschraube vorgesehen, um auch dort in Verbindung mit dem vorstehend genannten elastischen Element eine schwingungsmäßige Entkopplung zwischen Zylinderkopfhaube und Bundschraube zu verbessern.Thus, the respective rigidly connected to the cylinder head collar screw itself can initiate no vibrations in the intermediate flange, a sufficient radial clearance is provided at least between the channel passage opening and the collar screw. Appropriately, a corresponding radial play is provided for collar screw in the screw through hole to improve there in conjunction with the aforementioned elastic element a vibration decoupling between the cylinder head cover and collar screw.
Die Dichtungsanordnungen wirken vorteilhaft jeweils axial, also parallel zur Montagerichtung bzw. Verschraubungsrichtung.The sealing arrangements advantageously act in each case axially, ie, parallel to the mounting direction or screwing direction.
Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.
Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile beziehen.Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.
Es zeigen, jeweils schematisch,
- Fig. 1
- eine isometrische Ansicht einer Brennkraftmaschine im Bereich eines Zylinderkopfs,
- Fig. 2
- ein Querschnitt der Brennkraftmaschine entsprechend Schnittlinien II in
Fig. 1 , - Fig. 3
- eine vergrößerte Ansicht eines Details III aus dem Querschnitt der
Fig. 2 .
- Fig. 1
- an isometric view of an internal combustion engine in the region of a cylinder head,
- Fig. 2
- a cross section of the internal combustion engine according to section lines II in
Fig. 1 . - Fig. 3
- an enlarged view of a detail III from the cross section of
Fig. 2 ,
Entsprechend den
Zum Befestigen der Zylinderkopfhaube 3 und des Zwischenflansches 4 am Zylinderkopf 2 sind mehrere Bundschrauben 6 vorgesehen, die entlang der Umfangskontur des Zwischenflansches 4 bzw. des Zylinderkopfs 3 verteilt angeordnet sind. Die Bundschrauben 6 werden dabei parallel zur Montagerichtung 5 verschraubt, sodass eine Verschraubungsrichtung der Montagerichtung 5 entspricht, sodass im Folgenden auch die Verschraubungsrichtung mit 5 bezeichnet werden kann.For fastening the
Entsprechend den
Für die Montage der Zylinderkopfhaube 3 und des Zwischenflansches 4 am Zylinderkopf 2 sind außerdem zwei Dichtungsanordnungen, nämlich eine erste Dichtungsanordnung 12 und eine zweite Dichtungsanordnung 13 vorgesehen. Die erste Dichtungsanordnung 12 ist zwischen dem Zylinderkopf 2 und dem Zwischenflansch 4 angeordnet. Die erste Dichtungsanordnung 12 ist dabei als Axialdichtung konzipiert und wirkt dementsprechend axial, also parallel zur Verschraubungsrichtung 5 bzw. Montagerichtung 5. Die zweite Dichtungsanordnung 13 ist zwischen der Zylinderkopfhaube 3 und dem Zwischenflansch 4 angeordnet. Die zweite Dichtungsanordnung 13 ist hier ebenfalls als Axialdichtung konzipiert, sodass sie ebenfalls axial, also parallel zur Montagerichtung 5 wirkt.For the assembly of the
Im gezeigten, montierten Zustand ist die jeweilige Bundschraube 6 mit dem Gewindeabschnitt 9 in eine Gewindeöffnung 14 eingeschraubt, die am Zylinderkopf 2 ausgebildet ist. Ferner stützt sich die Bundschraube 6 mit ihrem Bund 11 am Zylinderkopf 2, nämlich an einem die Gewindeöffnung 14 einfassenden Öffnungsrand 15 axial, also parallel zur Schraubenlängsmittelachse 8 unmittelbar ab. Der Schaft 7 durchsetzt dabei eine Flanschdurchgangsöffnung 16, die im Zwischenflansch 4 ausgebildet ist, sowie eine Haubendurchgangsöffnung 17, die in der Zylinderkopfhaube 3 ausgebildet ist. Der Kopf 10 stützt sich im gezeigten Beispiel mittelbar an der Zylinderkopfhaube 3 axial ab. Während sich der Bund 11 starr und unmittelbar am Zylinderkopf 2 abstützt, ist der Kopf 10 zweckmäßig über ein elastisches, scheibenförmiges Element 18 mittelbar an der Zylinderkopfhaube 3 abgestützt. Das elastische Element 18 kann Schwingungen absorbieren.In the assembled state shown, the
Alternativ dazu kann bei anderen Ausführungsformen auf ein derartiges elastisches Element 18 verzichtet werden. In diesem Fall können Schwingungen vom Zylinderkopf 2 über die jeweilige Bundschraube 6 auf die Zylinderkopfhaube 3 übertragen werden. Diese Schwingungsübertragung kann jedoch bei bestimmten Bauformen aufgrund der vergleichsweise kleinen Kontaktstellen zwischen der Zylinderkopfhaube 3 und dem jeweiligen Schraubenkopf 10 vernachlässigbar gering sein.Alternatively, in other embodiments, such an
Die Bundschrauben 6 sind so ausgelegt, dass sie zwischen dem Zwischenflansch 4 und dem Zylinderkopf 2 einerseits und zwischen dem Zwischenflansch 4 und der Zylinderkopfhaube 3 andererseits jeweils keine Verblockung bewirken, sodass der Zwischenflansch 4 somit weder den Zylinderkopf 2 noch die Zylinderkopfhaube 3 direkt axial berührt. Erreicht wird dies dadurch, dass sich der Zwischenflansch 4 über die erste Dichtungsanordnung 12 mittelbar am Zylinderkopf 2 und über die zweite Dichtungsanordnung 13 mittelbar an der Zylinderkopfhaube 3 abstützt. Zweckmäßig sind beide Dichtungsanordnungen 12,13 elastisch ausgeführt, sodass sich der Zwischenflansch 4 sowohl am Zylinderkopf 2 als auch an der Zylinderkopfhaube 3 elastisch abstützt.The
Die Abstimmung der Bundschrauben 6 auf die damit verbundenen Komponenten der Brennkraftmaschine 1, also Zylinderkopf 2, Zylinderkopfhaube 3 und Zwischenflansch 4, erfolgt zweckmäßig so, dass ein in der Montagerichtung 5 gemessener Abstand 19 zwischen einer dem Zylinderkopf 2 zugewandten Unterseite 20 der Zylinderkopfhaube 3 und einer der Zylinderkopfhaube 3 zugewandten Oberseite 21 des Zylinderkopfs 2 größer ist als eine Höhe 22 des Zwischenflansches 4, die in der Montagerichtung 5 zwischen einer dem Zylinderkopf 2 zugewandten Unterseite 23 des Zwischenflansches 4 und einer der Zylinderkopfhaube 3 zugewandten Oberseite 24 des Zwischenflansches 4 gemessen ist. Durch die Elastizitäten der beiden Dichtungsanordnungen 12,13 ist der Zwischenflansch 4 zwischen dem Zylinderkopf 2 und der Zylinderkopfhaube 3 axial zentriert. Gleichzeitig ist der Zwischenflansch 4 durch die elastischen Dichtungsanordnungen 12,13 axial und quer dazu, also radial elastisch und beweglich am Zylinderkopf 2 und an der Zylinderkopfhaube 3 gelagert.The vote of the
Die erste Dichtungsanordnung 12 ist vorzugsweise durch eine einzige, entlang des Zwischenflansches 4 geschlossen umlaufende erste Dichtung gebildet, die im Folgenden ebenfalls mit 12 bezeichnet wird. Zweckmäßig ist auch die zweite Dichtungsanordnung 13 durch eine einzige, entlang des Zwischenflansches 4 geschlossen umlaufende zweite Dichtung gebildet, die im Folgenden ebenfalls mit 13 bezeichnet wird. Die erste Dichtung 12 ist im gezeigten Beispiel am Zwischenflansch 4 gekammert und an der Oberseite 21 des Zylinderkopfs 2 axial abgestützt. Ferner ist die zweite Dichtung 13 im Beispiel an der Zylinderkopfhaube 3 gekammert und an der Oberseite 24 des Zwischenflansches 4 axial abgestützt.The
Gemäß
Entsprechend
Claims (15)
- Internal combustion engine, in particular for a motor vehicle,- with a cylinder head (2),- with a cylinder head cover (3),- with an intermediate flange (4) that is arranged between the cylinder head (2) and the cylinder head cover (3) and that is a separate component with respect to the cylinder head cover (3) and the cylinder head (2),- with at least one collar screw (6) for fastening the cylinder head cover (3) and the intermediate flange (4) on the cylinder head (2) having a shaft (7) with a threaded section (9), a head (10) and a collar (11) spaced from the head (10),- with a first sealing arrangement (12) that is arranged between the cylinder head (2) and the intermediate flange (4),- with a second sealing arrangement (13) that is arranged between the cylinder head cover (3) and the intermediate flange (4),- whereby the respective collar screw (6) with the threaded section (9) is screwed into a threaded opening (14) formed on the cylinder head (2), with the shaft (7) through a flange passage opening (16) designed on the intermediate flange (4) and through a hood passage opening (17) designed on the cylinder head cover (3) and with the head (10) supported on the cylinder head cover (3),- whereby the cylinder head cover (3) is elastically supported indirectly via the second elastic sealing arrangement (13) on the intermediate flange (4),
characterized in that- the respective collar screw (6) is supported by the collar (11) on the cylinder head (2),- the intermediate flange (4) is elastically supported indirectly via the elastic first sealing arrangement (12) on the cylinder head (2). - Internal combustion engine according to claim 1,
characterized in that
the collar (11) is supported directly and/or rigidly on the cylinder head (2). - Internal combustion engine according to claim 1 or 2,
characterized in that- the head (10) is supported directly and/or rigidly on the cylinder head cover (3), or- the head (10) is rigidly and/or elastically supported indirectly via a rigid or elastic element (18) on the cylinder head cover (3). - Internal combustion engine according to one of claims 1 to 3,
characterized in that
the intermediate flange (4) does not directly touch the cylinder head (2) or the cylinder head cover (3) axially. - Internal combustion engine according to one of claims 1 to 4,
characterized in that
the respective collar screw (6) with the collar (11) is supported on the cylinder head (2) by the bottom side (23) of the cylinder flange (4) facing the cylinder head (2). - Internal combustion engine according to one of claims 1 to 5,
characterized in that
a gap (19) between the cylinder head (2) and the cylinder head cover (3) in the mounted state in the mounting direction (5) is greater than a height (22) of the intermediate flange (4). - Internal combustion engine according to one of claims 1 to 6,
characterized in that- the first sealing arrangement is formed by a single first seal (12) that runs closed around the intermediate flange (4), and/or- the second sealing arrangement is formed by a single second seal (13) that runs closed around the intermediate flange (4). - Internal combustion engine according to claim 7,
characterized in that- the first seal (12) is chambered on the intermediate flange (4) or on the cylinder head (2), and/or- the second seal (13) is chambered on the cylinder head cover (3) or on the intermediate flange (4). - Internal combustion engine according to claim 7 or 8,
characterized in that
the respective seal (12, 13) separates an inner side (25) of the intermediate flange (4) from an outer side (26) of the intermediate flange (4), whereby the respective collar screw (6) is arranged on the outer side (26). - Internal combustion engine according to one of claims 1 to 9, with at least one securing area (27) in which the intermediate flange (4) is secured to the cylinder head (2).
- Internal combustion engine according to claim 10,
characterized in that
in the securing area (27), the intermediate flange (4) is affixed to the cylinder head (2), even if all collar bolts (6) are removed, and the cylinder head cover (3) can be removed from the intermediate flange (4). - Internal combustion engine according to claim 10 or 11,
characterized in that
radial and axial clearance between the intermediate flange (4) and the cylinder head (2) is provided in the securing area (27) with respect to the mounting direction (5). - Internal combustion engine according to one of claims 1 to 12,
characterized in that
the respective collar screw (6) is formed from one piece and is integral to the shaft (7), the threaded section (9), the head (10) and the collar (11). - Internal combustion engine according to claim 13,
characterized in that
threaded section (9) is formed at a first end section of the collar screw (6), while the head (10) is formed at a second end section of the collar screw (6). - Internal combustion engine according to one of claims 1 to 14,
characterized in that
the collar (11) is formed at the shaft (7) and there separates the threaded section (9) from a thread-free central section, which extends from the collar (11) to the head (10).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011079166A DE102011079166A1 (en) | 2011-07-14 | 2011-07-14 | Internal combustion engine |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| EP2546504A2 EP2546504A2 (en) | 2013-01-16 |
| EP2546504A3 EP2546504A3 (en) | 2015-01-21 |
| EP2546504B1 true EP2546504B1 (en) | 2018-10-03 |
| EP2546504B2 EP2546504B2 (en) | 2023-12-06 |
Family
ID=46466266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12175309.9A Active EP2546504B2 (en) | 2011-07-14 | 2012-07-06 | Internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2546504B2 (en) |
| CN (1) | CN202991257U (en) |
| DE (1) | DE102011079166A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670562B (en) * | 2013-11-08 | 2017-10-03 | 潍柴动力股份有限公司 | A kind of rocker arm bonnet and the engine with the rocker arm bonnet |
| DE102018133460A1 (en) * | 2018-12-21 | 2020-06-25 | Elringklinger Ag | Cover unit |
| CN110284992B (en) * | 2019-06-21 | 2020-12-29 | 浙江博弈科技股份有限公司 | Vibration-damping anti-loosening type connecting structure of cylinder head cover |
| EP4081703A4 (en) * | 2019-12-24 | 2024-02-28 | Fleetguard Filters Private Ltd | Cylinder cover for internal combustion engine |
| DE102021201823A1 (en) * | 2021-02-26 | 2022-09-01 | Mahle International Gmbh | cylinder head cover |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN202991257U (en) | 2013-06-12 |
| DE102011079166A1 (en) | 2013-01-17 |
| EP2546504A3 (en) | 2015-01-21 |
| EP2546504A2 (en) | 2013-01-16 |
| EP2546504B2 (en) | 2023-12-06 |
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