Cylinder head cover, cylinder head and internal combustion engine

Abstract

The invention relates to a cylinder head cover (3) for covering a cylinder head (2) of an internal combustion engine (1), the cylinder head cover (3) having at least one first sealing surface (6) by means of which the cylinder head cover (3) can be tightly connected to the cylinder head (2) by means of an associated second sealing surface (11). In order to enable low-noise operation of the internal combustion engine (1), at least one first reference surface (9) is provided on the cylinder head cover (3) for clearly positioning on an associated second reference surface (10) of the cylinder head (2), and the at least one first reference surface (9) is separated from the at least one first sealing surface (6).

Description

Technical Field

[0001] The present invention relates to a cylinder head cover for covering a cylinder head of an internal combustion engine. In addition, the present invention relates to a cylinder head and an internal combustion engine having such a cylinder head and such a cylinder head cover. Background Art

[0002] The cylinder head cover closes the cylinder head toward the top, protecting the upper actuating elements of the valve train from dust and additionally preventing lubricating oil leakage. The installation of the cylinder head cover, which can be made of aluminum and / or plastic, for example, is crucial to the subsequent function of the internal combustion engine, particularly when the cover also at least partially takes over the installation of the camshaft. The tolerances established during the machining of the cylinder head and cover play a decisive role here. To ensure a more precise relative position between the cylinder head and the cylinder head, so-called reference surfaces are provided, via which the cylinder head cover is connected to the cylinder head. These reference surfaces also form sealing surfaces between the cover and the cylinder head, and under certain circumstances, seals are also provided between these sealing surfaces to seal the cylinder head.

[0003] However, a disadvantage of known cylinder head covers is that, in order to obtain a high-precision reference surface that also represents the sealing surface, the sealing surface must be machined with high precision according to dimensional tolerances, which is only feasible to a limited extent and / or only at great expense. Due to the high manufacturing effort associated with remachining the sealing surface, which also serves as the reference surface, the production of such cylinder head covers is relatively complex and therefore expensive. However, in order to ensure a clear pre-positioning of the camshaft relative to the associated cam follower, high dimensional accuracy and low permissible dimensional tolerances are necessary in the region of the sealing surface serving as the reference surface. Summary of the Invention

[0004] The object of the present invention is therefore to specify an improved or at least alternative embodiment for a cylinder head of generic type which in particular overcomes the disadvantages known from the prior art.

[0005] The present invention is based on the following general idea: for the first time, on a cylinder head cover known per se, a reference surface, or at least one such reference surface, is separated from the sealing surface and the cylinder head cover is fastened directly to the cylinder head, for example by screws, via the reference surface. In this way, larger dimensional tolerances can be permitted in the area of ​​the sealing surface of the cylinder head cover, resulting in improved vibration characteristics and noise reduction, and the alignment of the camshaft relative to the cam follower can be significantly improved. Here, the cylinder head cover according to the invention for covering the cylinder head of an internal combustion engine has at least one first sealing surface, via which the cylinder head cover can be tightly connected to the cylinder head using an associated second sealing surface. According to the invention, at least one first reference surface is now provided on the cylinder head for unambiguous positioning on an associated second reference surface of the cylinder head, wherein the at least one first reference surface and the at least one first sealing surface are formed separately from one another and are therefore separated relative to one another. By separating the first sealing surface of the cylinder head cover from the first reference surface, the following decisive advantages can be achieved:

[0006] For example, the first sealing surface can be machined with larger tolerances, thus reducing costs, or even completely eliminated. Another advantage is that the sealing during installation of the cylinder head cover on the cylinder head is not included in the overall tolerances. By producing at least one first reference surface with relatively low tolerances, increased precision can be achieved between the camshaft axis and the cam follower axis, and thus between the camshaft and the cam follower (e.g., rocker arm). Furthermore, a tight and functionally sound connection (e.g., screw connection) to the cylinder head cover is possible, which has a positive impact on the absorption of engine forces and vibration characteristics. This also significantly reduces noise emissions. Furthermore, the use of low-cost elastomeric seals, where applicable, is possible, which can compensate for any large dimensional errors that may occur on the first sealing surface. Furthermore, the number of connection points, particularly screw-in points, of the cylinder head cover to the cylinder head can be reduced, thereby enabling a smaller number of connection devices (e.g., screws) and reducing the associated warehousing and logistics expenditure, thereby reducing installation costs.

[0007] In an advantageous further development of the solution according to the invention, the at least one first reference surface is smaller than the at least one first sealing surface. This offers significant advantages, for example, because the smaller surface makes remachining the at least one first reference surface more cost-effective than remachining the previously relatively large first sealing surface. Due to the smaller first reference surface and its lower tolerances, a higher precision between the camshaft axis and the cam follower axis can also be achieved, thereby also enabling significantly better operation of the valve train of the internal combustion engine. The more precise alignment of the camshaft axis relative to the cam follower axis also reduces friction, thereby reducing fuel consumption and noise emissions.

[0008] In a particularly advantageous embodiment of the cylinder head cover according to the invention, the sum of all first reference surfaces on the cylinder head is smaller than the sum of all first sealing surfaces. Therefore, when the cylinder head cover according to the invention is connected to a plurality of associated second reference surfaces of the cylinder head via the plurality of first reference surfaces, the machining effort and thus the manufacturing costs can be reduced, as the total surface area of ​​the first reference surfaces is smaller than that of the first sealing surfaces. In this case, the cylinder head cover can be connected to the cylinder head in a form-fitting manner via its first reference surfaces.

[0009] In an advantageous further development of the cylinder head cover according to the invention, at least two first reference surfaces are provided, which are oriented obliquely relative to one another. These oblique first and second reference surfaces, formed complementary to one another and arranged on the cylinder head, enable a defined, form-fitting attachment position of the cylinder head cover to the cylinder head, thereby achieving a precise parallel alignment of the camshaft axis relative to the cam follower axis. This, of course, requires that the camshaft be at least partially mounted in the cylinder head cover.

[0010] In practice, at least two bearings for the camshaft are arranged on the cylinder head cover, with a first reference surface being provided on at least one of the bearings. The bearing can be designed as a split bearing, with a first bearing half-shell being integrally formed with the cylinder head cover, while a second bearing half-shell is connected (e.g., screwed) to the first bearing half-shell and thus to the cylinder head cover. It is of course also conceivable for at least one bearing to be designed as a one-piece bearing on the cylinder head cover, preferably integrally formed with the cylinder head cover. The provision of the first reference surface on at least one bearing makes it possible to connect the cylinder head cover to the cylinder head close to the camshaft, thereby better absorbing engine forces and optimizing vibration characteristics. Furthermore, noise emissions can be reduced in this way.

[0011] Purely theoretically, it is also conceivable that at least two bearings are part of a bearing bracket that is connected to the cylinder head cover or formed integrally therewith. This bearing bracket allows for precise mounting of the camshaft or camshafts. The bearing bracket, formed separately and connected to the cylinder head cover, also allows for different materials to be selected for the bearing bracket on the one hand and the cylinder head cover on the other. Thus, the bearing bracket could be formed from metal, for example, while the cylinder head cover is formed from plastic. In this case, the cylinder head cover could also be injection-molded onto the bearing bracket. Alternatively, it is conceivable that the cylinder head cover is formed as a plastic injection-molded part, with the at least two bearings comprising bearing rings, in particular aluminum bearing rings, which are injection-molded into or overmolded with the plastic of the cylinder head cover.

[0012] In an advantageous further development of the solution according to the invention, the at least one first sealing surface is arranged parallel to the first sealing surface and spaced orthogonally from the at least one first reference surface. The first reference surface can thus be located at a different height level than the first sealing surface, with the provision of a plurality of first reference surfaces, each at a different height level, being conceivable. In this way, the positive-fit connection between the cylinder head cover and the cylinder head can be further improved.

[0013] In practice, the first sealing surface can be flat or include a sealing groove for accommodating a seal. With the sealing surface according to the present invention, alignment of the cylinder head cover relative to the cylinder head is achieved via the at least one first reference surface, which is why greater dimensional tolerances are acceptable for the first sealing surface. Furthermore, individual configurations can be employed to meet the requirements for the first sealing surface, such as using annular seals, liquid seals, or metal gaskets that require or prefer different sealing surfaces.

[0014] In another advantageous embodiment of the cylinder head cover according to the invention, it is designed as a metal die-casting (e.g., aluminum die-casting) or an injection-molded part. Both embodiments enable not only cost-effective production but also weight-optimized and high-quality manufacturing. In particular, the design of a plastic injection-molded part offers particularly cost-effective low-profile manufacturing possibilities. Due to the design as a plastic injection-molded part or metal die-casting, at least one opening can also be provided in the cylinder head cover, for example, for mounting functional components such as, in particular, position sensors, pumps, or oil mist separators, or for filling with oil.

[0015] The present invention is also based on the general concept of equipping a cylinder head of an internal combustion engine with at least one second sealing surface, via which the cylinder head can be tightly connected to an associated first sealing surface of a cylinder head cover as described in the preceding paragraph. The cylinder head cover is provided with at least one second reference surface for unambiguous positioning on an associated first reference surface of the cylinder head cover, and the at least one second reference surface and the at least one second sealing surface are formed separately from one another. In this way, a cylinder head can be created that can be connected to the cylinder head cover as described in the preceding paragraph via a second reference surface that is separate from the second sealing surface. The separation of the second reference surface from the second sealing surface reduces noise generation and improves absorption of engine forces. The separation of the second sealing surface from the second reference surface also allows for greater dimensional tolerances on the second sealing surface, thereby eliminating the need for precise or general machining of the second sealing surface. The second reference surface alone is crucial for precise assembly of the cylinder head cover and the camshaft mounted thereon, and its smaller surface area allows for reduced machining, particularly enabling shorter machining times.

[0016] In an advantageous further development of the cylinder head according to the invention, the cylinder head includes at least two reference surfaces that are inclined toward one another. The complementary, similarly inclined first reference surface of the cylinder head cover enables a positive fit and a well-defined pre-positioning of the cylinder head cover relative to the cylinder head. This also enables simple yet precise parallel positioning of the camshaft, which is mounted on the cylinder head, and its camshaft axis relative to the cam follower axis predetermined by the cylinder head. Due to the parallel mounting, the valve train can operate with low friction and high precision, resulting in lower fuel consumption and low noise emissions for the internal combustion engine.

[0017] The present invention is further based on the following general idea: an internal combustion engine having a cylinder head as described in the preceding paragraph and a cylinder head cover connected to the cylinder head is described. This not only allows for cost-effective manufacture of the internal combustion engine (due to the reduced reference surface dimensions), but also improves the absorption of engine forces, optimizes vibration characteristics, and reduces noise emissions. By simultaneously separating the first reference surface according to the present invention from the first sealing surface on the cylinder head cover and the associated second reference surface from the second sealing surface on the cylinder head, the first and second sealing surfaces can also be manufactured with larger dimensional tolerances, which can be easily compensated for, for example, by using elastomeric seals.

[0018] The cylinder head cover is screwed, glued, riveted and / or pinned on at least one of its first reference surfaces to an associated second reference surface on the cylinder head. Even this non-exhaustive enumeration provides an overview of the numerous connection possibilities that exist between the cylinder head cover according to the invention and an existing cylinder head. An elastomeric seal, a paper gasket, a liquid seal or a metal gasket can be provided between the first sealing surface and the associated second sealing surface. The separation of the reference surface from the sealing surface according to the invention also makes it possible to use elastomeric seals that, for example, allow greater dimensional tolerances on the first and second sealing surfaces, since the alignment of the cylinder head cover relative to the cylinder head no longer takes place via the sealing surface, but now via a reference surface that is separate from the sealing surface.

[0019] In an advantageous further development of the internal combustion engine according to the invention, the cylinder head cover includes at least two first reference surfaces that are inclined toward one another, wherein at least two second inclined reference surfaces are provided on the cylinder head and are formed complementary to the inclined first reference surfaces provided on the cylinder head, and wherein the cylinder head cover and the cylinder head are connected to one another in a form-fitting manner via the at least two first and second reference surfaces. The inclined first and second reference surfaces thus enable a form-fitting connection between the cylinder head and the cylinder head cover to be established, which already reinforces the predetermined parallelism between the camshaft axis and the cam follower axis. This simultaneously enables simple yet high-quality assembly.

[0020] Further important features and advantages of the invention are apparent from the drawings and the associated figure description based on the drawings.

[0021] It is to be understood that the features mentioned above and yet to be explained below can be used not only in the respective combination stated but also in other combinations or alone, without departing from the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Preferred exemplary embodiments of the invention are shown in the drawings and explained in more detail in the following description, in which identical reference numerals relate to identical or similar or functionally identical components.

[0023] Schematically shown respectively,

[0024] Figure 1 Section through an internal combustion engine with a cylinder head cover and a cylinder head according to the prior art,

[0025] Figure 2 Section through a cylinder head cover according to the invention and a cylinder head according to the invention,

[0026] Figure 3Side view of the cylinder head cover according to the present invention,

[0027] Figure 4 Section through an internal combustion engine according to the invention in the region of the cylinder head cover and the cylinder head. DETAILED DESCRIPTION

[0028] according to Figure 1 A conventional internal combustion engine 1' comprises a cylinder head 2' and a cylinder head cover 3', wherein a camshaft 5' is mounted on the cylinder head cover 3' via a bearing 4'. A first sealing surface 6' with a seal 7' is provided on the cylinder head cover 3', wherein an associated second sealing surface 11' is provided on the cylinder head 2' and, when the cylinder head cover 3' is mounted on the cylinder head 2', seals the camshaft space 8' from the surrounding environment via the seal 7'. In order to enable precise alignment of the cylinder head cover 3' relative to the cylinder head 2', the first sealing surface 6' on the cylinder head cover 3' is simultaneously formed as a first reference surface 9', while the second sealing surface 11' provided on the cylinder head 2' simultaneously serves as a second reference surface 10'.

[0029] Since the camshaft 5' is also mounted on the cylinder head cover 3' via bearings 4', precise alignment of the camshaft axis relative to the cam follower axis on the cylinder head 2' (not described in further detail) is required to achieve particularly low-friction operation of the valve train, thereby reducing noise emissions and lowering fuel consumption. First and second reference surfaces 9', 10' are used for precise alignment of the cylinder head cover 3' relative to the cylinder head 2' and therefore must be formed very precisely, and in particular, must be remachined. Since, in the case of the internal combustion engine 1' known from the prior art, the first and second reference surfaces 9', 10' also serve as sealing surfaces 6', 11', particularly high dimensional accuracy is required to ensure both tightness and precise alignment. The low dimensional tolerances in the areas of the sealing surfaces 6', 11' that serve as reference surfaces 9', 10' make the manufacture of both the cylinder head 2' and the cylinder head cover 3' relatively complex and expensive.

[0030] The solution according to the invention is described below, wherein identical reference numerals refer to identical components, but in the solution according to the invention these components are not preceded by single quotes.

[0031] according to Figures 2 to 4, the cylinder head cover 3 according to the present invention, shown here for covering the cylinder head 2 of the internal combustion engine 1, is likewise provided with at least one first sealing surface 6, by means of which the cylinder head cover 3 can be tightly connected to an associated second sealing surface 11 on the cylinder head 2. At least one first reference surface 9 is also provided on the cylinder head cover 3 for clearly positioning and thus aligning it relative to the cylinder head 2 or the associated at least one second reference surface 10 of the cylinder head 2. According to the present invention, in this case, the at least one first reference surface 9 and the at least one first sealing surface 6 are formed separately from each other on the cylinder head cover 3, whereby the alignment function and the sealing function can likewise be separated from each other.

[0032] In the same way, also in the cylinder head 2 according to the present invention (see Figure 4 ), the second reference surface 10 for unambiguous positioning on the associated first reference surface 9 of the cylinder head cover 3 is now formed separately from the at least one second sealing surface 11 on the cylinder head 2. In this way, machining of the first and / or second sealing surfaces 6, 11 can be performed with greater tolerances or can be omitted entirely, since these sealing surfaces 6, 11 are no longer decisive for the exact alignment of the cylinder head cover 3 relative to the cylinder head 2 and, therefore, also for the exact alignment of the camshaft 5 or of the camshaft axis of the camshaft 5 relative to the cam follower axis on the cylinder head 2.

[0033] Further observation based on Figure 2 and Figure 3 With regard to the cylinder head cover 3 , it can be noted that screws 12 are provided in the region of the first reference surface 9 , so that the cylinder head cover 3 is fixed to the cylinder head 2 via the screws 12 provided directly on the first reference surface 9 and thus close to the bearing, which is a major advantage in particular for absorbing greater engine forces.

[0034] When viewing first reference surface 9 relative to first sealing surface 6 on cylinder head cover 3 and second reference surface 10 relative to second sealing surface 11 on cylinder head 2, it can be noted that at least one first reference surface 9 is smaller than at least one first sealing surface 6, and to the same extent, at least one second reference surface 10 is also smaller than at least one second sealing surface 11. This makes it possible to omit the previously required extensive machining of sealing surfaces 6 and 11, and, if necessary, only the significantly smaller reference surfaces 9 and 10 need to be machined, which saves both machining time and machining costs. Here, the sum of all first reference surfaces 9 can also be smaller than the sum of all first sealing surfaces 6. Similarly, the sum of all second reference surfaces 10 can also be smaller than the sum of all second sealing surfaces 11.

[0035] Looking further at the cylinder head cover 3, it can be noted that at least two bearings 4 for camshafts 5 (here, even two camshafts 5) are provided on the cylinder head cover, wherein an associated first reference surface 9 is provided on at least one of these bearings 4. Here, the at least two bearings 4 can be part of a bearing carrier that is connected to the cylinder head cover 3 or formed integrally with the cylinder head cover 3. Thus, the bearing carrier can be formed from a different material than the cylinder head cover 3 (e.g., metal, in particular aluminum). The cylinder head cover can then be formed, for example, by plastic injection molding. Here, the bearings 4 can be designed as split bearings or as single-piece bearings.

[0036] It is generally also conceivable to form the cylinder head cover 3 as a plastic injection-molded part, wherein in this case at least two bearings 4 comprise bearing rings 4 a for one or more bearing shells, in particular aluminum bearing rings, which are injection-molded into the plastic of the cylinder head cover 3 .

[0037] according to Figure 2 and Figure 4 , the first sealing surface 6 is arranged parallel to or orthogonal to a surface spaced apart from at least one reference surface 9, such that according to Figures 2 to 4 The first sealing surface 6 is higher than the first reference surface 9. In the illustrated embodiment, the first sealing surface 6 is also designed to be flat, although it is obvious that this first sealing surface can also optionally include a sealing groove for accommodating a seal (not shown). In the same way, the second sealing surface 11 provided on the cylinder head 2 can also be designed to be flat or to include a sealing groove for accommodating a seal. In general, complementary curved first reference surfaces 9 and associated curved second reference surfaces 10 are also conceivable, which allow the cylinder head cover 3 to be positively locked relative to the cylinder head 2 and thus precisely aligned relative to the cylinder head.

[0038] Typically, the cylinder head cover 3 can be formed as a metal die-cast or injection-molded part (e.g. made of aluminum), wherein at least one opening for mounting functional components (e.g. position sensors, pumps or oil mist separators) or for filling with oil can also be provided on the cylinder head cover 3.

[0039] In a particularly advantageous embodiment of the solution according to the invention, at least two first reference surfaces 9 inclined toward one another can also be provided on the cylinder head cover 3, wherein second reference surfaces 10 inclined toward one another and formed complementary to one another can also be provided in the same manner on the cylinder head 2. In this way, a particularly simple and precise alignment and mounting of the cylinder head cover 3 on the cylinder head 2 can be achieved due to form-fitting.

[0040] On at least one first reference surface 9 of the cylinder head cover 3, the cylinder head cover can be screwed, glued, riveted or connected by pins to an associated second reference surface 10 of the cylinder head 2. Such pins can facilitate easier pre-positioning of the cylinder head cover 3 relative to the cylinder head 2, thus simplifying installation.

[0041] Between the first sealing surface 6 and the second sealing surface 11, for example, an elastomeric seal, a paper gasket, a liquid seal or a metal gasket can be provided, wherein, since the reference surfaces 9, 10 are separated from the two sealing surfaces 6, 11, no or less intensive reprocessing of the two sealing surfaces is required, since, for example, larger dimensional tolerances can be compensated for without problems by the elastomeric seal.

[0042] With the internal combustion engine 1 according to the invention, having the cylinder head 2 according to the invention and the cylinder head cover 3 according to the invention, it is possible for the first time to separate the reference surfaces 9, 10 for aligning the cylinder head cover 3 relative to the cylinder head 2 from the associated sealing surfaces 6, 11, thereby making it possible to manufacture the internal combustion engine 1 more simply and cost-effectively, while also being very precise. Since the reference surfaces 9, 10 are significantly smaller than the associated sealing surfaces 6, 11 and the latter do not need to be reworked or only need to be reworked insignificantly, in the most favorable case, rework can be limited to the reference surfaces 9, 10, thereby significantly reducing the rework effort.

Claims

1. A cylinder head cover (3) for covering a cylinder head (2) of an internal combustion engine (1), the cylinder head cover having at least one first sealing surface (6) by means of which the cylinder head cover (3) can be tightly connected to an associated second sealing surface (11) on the cylinder head (2), It is characterized by , - at least one first reference surface (9) is provided on the cylinder head cover (3) for unambiguous positioning on an associated second reference surface (10) of the cylinder head (2), - the at least one first reference surface (9) and the at least one first sealing surface (6) are formed separately from one another and are therefore separated relative to one another, so that the alignment function and the sealing function are separated from one another, - said at least one first sealing surface (6) is arranged parallel to and orthogonally spaced from said at least one first reference surface (9), - at least two bearings (4) for a camshaft (5) are provided on the cylinder head cover (3), wherein a first reference surface (9) is provided on at least one of the bearings (4), and - The at least two bearings (4) are part of a bearing bracket formed integrally with the cylinder head cover (3).

2. The cylinder head cover according to claim 1, It is characterized by: - the at least one first reference surface (9) is smaller than the at least one first sealing surface (6), and / or - the sum of all first reference surfaces (9) is smaller than the sum of all first sealing surfaces (6).

3. The cylinder head cover according to claim 1 or 2, It is characterized by: - The at least one first sealing surface (6) is flat or comprises a sealing groove for accommodating a seal.

4. The cylinder head cover according to claim 1 or 2, It is characterized by: - the cylinder head cover (3) is formed as a metal die-cast part or a plastic injection-molded part, and / or - At least one opening for installing functional components or for filling oil is provided on the cylinder head cover (3).

5. The cylinder head cover according to claim 1 or 2, It is characterized by: The cylinder head cover (3) is formed as a plastic injection-molded part, wherein the at least two bearings (4) comprise bearing rings (4a) which are injection-molded into the plastic of the cylinder head cover (3).

6. The cylinder head cover according to claim 1 or 2, It is characterized by: - the cylinder head cover (3) comprises at least two first reference surfaces (9) inclined towards each other, and / or - At least one first reference surface (9) is designed to be curved.

7. The cylinder head cover according to claim 4, It is characterized by: -The metal die casting is an aluminum die casting.

8. The cylinder head cover according to claim 4, It is characterized by: The functional component is a position sensor, a pump or an oil mist separator.

9. The cylinder head cover according to claim 5, It is characterized by: The bearing ring is an aluminum bearing ring.

10. A cylinder head (2) of an internal combustion engine (1), said cylinder head having at least one second sealing surface (11) by means of which said cylinder head (2) can be tightly connected to at least one associated first sealing surface (6) of a cylinder head cover (3) according to any one of claims 1 to 9, wherein At least one second reference surface (10) is provided on the cylinder head (2) for unambiguous positioning on an associated first reference surface (9) of the cylinder head cover (3), and wherein the at least one second reference surface (10) and the at least one second sealing surface (11) are formed separately from each other and are therefore separated relative to each other, so that the alignment function and the sealing function are separated from each other, and The at least one second sealing surface (11) is arranged parallel to and spaced apart orthogonally from the at least one second reference surface (10).

11. The cylinder head according to claim 10, It is characterized by: - the at least one second reference surface (10) is smaller than the at least one second sealing surface (11), and / or The sum of all second reference surfaces (10) is smaller than the sum of all second sealing surfaces (11).

12. The cylinder head according to claim 10 or 11, It is characterized by: - the cylinder head (2) comprises at least two second reference surfaces (10) inclined towards each other, and / or - At least one second reference surface (10) is designed to be curved.

13. An internal combustion engine (1) having a cylinder head (2) according to any one of claims 10 to 12 and a cylinder head cover (3) according to any one of claims 1 to 9, wherein the cylinder head cover is connected to the cylinder head.

14. The internal combustion engine according to claim 13, It is characterized by: - the cylinder head cover (3) is screwed, glued, riveted and / or pinned on at least one of its first reference surfaces (9) to an associated second reference surface (10) on the cylinder head (2), and / or An elastomeric seal, a paper gasket, a liquid seal or a metal gasket is provided between the at least one first sealing surface (6) and the associated at least one second sealing surface (11).

15. An internal combustion engine according to any one of claims 13 or 14, It is characterized by: - the cylinder head cover (3) comprises at least two first reference surfaces (9) inclined towards each other, - at least two inclined second reference surfaces (10) are provided on the cylinder head (2), the at least two inclined second reference surfaces being formed complementarily to the inclined first reference surfaces (9) provided on the cylinder head cover (3), The cylinder head cover (3) and the cylinder head (2) are connected to each other in a form-fitting manner via the at least two first reference surfaces (9) and the at least two second reference surfaces (10).

Images