EP2300693A1

EP2300693A1 - Hydraulic camshaft adjuster

Info

Publication number: EP2300693A1
Application number: EP09765567A
Authority: EP
Inventors: Bernhard Terfloth; Antonio Casellas; Rainer Schmitt; Eberhard Ernst
Original assignee: GKN Sinter Metals Holding GmbH
Current assignee: GKN Sinter Metals Holding GmbH
Priority date: 2008-06-18
Filing date: 2009-06-10
Publication date: 2011-03-30
Anticipated expiration: 2029-06-10
Also published as: WO2009152987A1; JP2011524495A; ES2393085T3; CN102124188A; US20110126785A1; CN102124188B; EP2300693B1; DE102008028640A1; JP5313342B2; US8550046B2

Abstract

The invention relates to a hydraulic cam shaft adjuster (2) having a driven outer body (4) comprising at least one hydraulic chamber (18), and an inner body (6) disposed on the inside of the outer body (4), which can be firmly attached to the camshaft and has at least one pivoting wing (8) extending into the hydraulic chamber in the radial direction, thus partitioning the hydraulic chamber into a first working chamber (22) and a second working chamber (24). The inner body (6) further comprises at least one oil inlet and oil outlet conduit (14, 16) extending from a jacket interior (10) to a jacket exterior (12) of the inner body (6) up to one of the two working chambers (22). For this purpose the inner body (6) is assembled using at least one first element (28) and one second element (30), wherein the two elements each have at least one geometry (39, 41, 50, 52) at front sides (38, 40) facing each other, said geometry forming the oil inlet and oil outlet conduit of the inner part together with the other element.

Description

Hydraulic camshaft adjuster

The invention relates to a hydraulic camshaft adjuster for a camshaft of an internal combustion engine.

Various embodiments of hydraulic camshaft adjusters are known from the prior art, which are constructed according to the vane principle. One speaks in this context of so-called Flügelzellenverstellem.

By means of a camshaft adjuster, it is possible to change a phase angle of a camshaft of an internal combustion engine relative to a crankshaft of the internal combustion engine driving the camshaft. As a result, a fuel consumption and raw emissions of the internal combustion engine can be lowered and improve a performance and torque characteristics of the internal combustion engine.

A Flügelzellenversteller of the generic type is known for example from the document DE 10 2004 022 097 A1. The Flügelzellenversteller thereby comprises an outer body which is drivable via a crankshaft, and an inner lying to the outer body arranged inner body, which is fixedly connected to a camshaft. By a controlled supply of oil from an oil circuit of an internal combustion engine to individual hydraulic or working chambers of the camshaft adjuster formed in the inner body Ölzulauf- and oil drain lines and a associated with the oil supply pressure build-up in the oil inlet and oil drain lines and the chambers of the inner body the outer body adjusted and thus changed the phase angle of the camshaft relative to the crankshaft.

Both the outer body and the inner body of such a Flügelzellenverstellers can be known sintered technology. In the production of sintered parts, metal powders are pressed into workpieces or pressings, also known as green compacts, and the workpieces are subsequently sintered. During sintering, the workpieces are given their final strength by the metal powders forming a coherent crystal structure as they pass through a sintering furnace through diffusion and recrystallization processes. A height dimension of the workpieces obtained during pressing of the metal powder can deviate from a desired height dimension. These deviations are caused on the one hand by inaccuracies which adhere to a filling of a press mold of a pressing device and on the other hand by elasticities and / or friction conditions of the pressing device, which are subject to a temporal change.

Finally, the previously described oil feed and oil drain lines, which extend from an inner shell side to a casing outer side of the inner body up to the associated hydraulic chambers, are drilled in the sintered inner body. These holes are finally deburred.

It is therefore the object of the present invention to provide a hydraulic camshaft adjuster in the form of a vane cell converter, which is easier to manufacture in terms of sintering technology.

This object is achieved with a hydraulic camshaft adjuster with the features of claim 1. The features specified in the dependent claims are the subject of preferred embodiments and developments of the solution. In the following description further advantageous features are given, which may be the subject of further refinements and developments of the solution. These further features can be combined with each other and / or with the features of the claim statement.

A hydraulic camshaft adjuster for a camshaft of an internal combustion engine is proposed, which is designed in the manner of a vane-type adjuster. The camshaft adjuster includes an externally drivable by means of a crankshaft of the internal combustion engine outer body with at least one hydraulic chamber, and a preferably coaxially disposed inside the inner body to the inner body, which is firmly connected to the camshaft. Under a fixed connection is a positive and / or non-positive connection between the inner body and the camshaft to understand.

The inner body comprises at least one pivoting wing, which extends in the radial direction into the hydraulic chamber and thereby divides the hydraulic chamber into a first working chamber and a second working chamber. The inner body further comprises at least an oil inlet and outlet line extending from an inside of the shell to a shell outside of the inner body and up to one of the two working chambers, the inner body being exposed to the outside to produce a controlled hydraulic pressure in the oil inlet and outlet conduit and in one of the working chambers. body is pivotable for adjusting the camshaft.

The inner body is further joined together at least from a first element and a second element, wherein the two elements each have at least one geometry on mutually facing end sides, which together with the respective other element forms the oil inlet and oil drain line of the inner part. In an advantageous embodiment of the invention it is provided that the two elements have a substantially radial extent over the circumference. According to the invention it is also provided that the two elements have a substantially axial extent over the circumference.

In this case, a geometry is to be understood as meaning a recess in the respective element which extends from the shell inner side to the outer shell side of the inner body and which does not penetrate the element in its longitudinal direction.

An advantage of the proposed camshaft adjuster is that there is no further machining required in connection with the above-described sintering production of such inner bodies in order to produce the oil feed and oil drain line. The further machining can also include a deburring of the oil inlet and outlet line. Rather, this Ölzulauf- and Ölablaufleitung created by the joining of the two elements, which together form the inner body. The parting line formed by the two elements closes hydraulically tight.

Furthermore, as a result of the thinner design of the two elements compared with a one-part embodiment of the inner body, which is known from the prior art, advantageously lower tolerances in the longitudinal direction of the inner body can be achieved with regard to a height dimension achieved when pressing metal powders into so-called green bodies.

The inner body preferably has at least two pivoting wings which each extend into a hydraulic chamber of the outer body. In a preferred embodiment of the camshaft adjuster, the inner body has four pivoting wings which extend each extending into a hydraulic chamber of the outer body. In a further preferred embodiment of the camshaft adjuster, the inner body has five pivoting vanes which each extend into a hydraulic chamber of the outer body.

In a preferred embodiment of the camshaft adjuster, at least one of the two elements has at least one projection on the front side, which engages in a form-fitting manner for connecting the two elements into a corresponding recess of the other element and forms an interference fit with the recess. The projection may be formed in the manner of a claw or a web, wherein a web is a similar to a feather trained projection to understand. Preferably, at least one of the two elements on the front side a plurality of projections which engage positively in the joining of the two elements in corresponding recesses of the other element, wherein under the projections both claw-like and web-like projections may be.

In a further preferred embodiment of the camshaft adjuster, the two joined elements are identical and each have at least one extending from the shell inside to the shell outside projection which positively engages the connection of the two elements in a corresponding recess of the other element and thereby with the recess forms an interference fit, wherein the two projections together with the associated recesses each form a Ölzulauf- and oil drain line of the inner part.

An advantage of this embodiment is that in connection with the above-described sintering production of such inner body only a pressing tool is needed to produce workpieces of the same configuration.

The oil inlet and outlet pipe preferably extends in the radial direction from the shell inside to the outer shell side of the inner body. The oil inlet and outlet pipe preferably has a quadrangular cross-sectional shape, which is due to the frontal geometries of the two elements joined together. The frontal geometries can also form other cross-sectional shapes, such as a circular or a triangular shape. In a further preferred embodiment of the camshaft adjuster, a spring is arranged in the other working chamber between the outer body and the pivoting wing, which acts in a restoring manner in relation to the pivoting of the inner body.

In a further particularly preferred embodiment of the camshaft adjuster at least a first oil inlet and oil drain line and a second oil inlet and Ölab- are provided, wherein the first oil inlet and drain line extends to one of the two working chambers, while the second Ölzulauf- and Oil drain line extends to the other working chamber.

The pivoting wing may be formed integrally with the inner body. Alternatively, the pivoting wing may be inserted into the inner body on the outside of the jacket. In this case, a receptacle for the swing-wing is provided on the outer shell side of at least one of the two elements. Alternatively, the recording can also be performed in two parts and be provided on both elements depending on a receptacle for the swing-wing. In this case, the receptacle is preferably formed on the projection. Further, the receptacle is preferably formed in the manner of a slot and aligned with the longitudinal direction of the inner body. The pivoting wing is preferably guided movably in the receptacle.

In a further preferred embodiment of the camshaft adjuster, a planetary gear is arranged between the pivoting wing and the outer body, wherein on the outer body a corresponding to the planetary gear segment is formed, which cooperates with the planetary gear, and wherein on the pivoting wing a pocket is formed in the the planetary gear is inserted. Further, a planetary gear is disposed on both sides of the hydraulic chamber between a hollow cylindrical core of the inner body and the outer body, wherein on both sides of the hydraulic chamber on the hollow cylinder core corresponding to the associated planet gear segment is formed, which cooperates with the planetary gear, and wherein to both Side of the hydraulic chamber on the outer body, a pocket is formed, in which the associated planetary gear is used.

In this context, reference is made to the document DE 10 2004 047 817 B3, from which such a design of a hydraulic cam Shaft adjuster in the form of a Flügelstellverstellers is known and is hereby made fully to the disclosure of the invention.

In a further preferred embodiment of the camshaft adjuster, both the outer body and the two joined elements of the inner body are formed as sintered parts. The two elements are already as compacts or green compacts joined together, which receive as workpieces their final strength during sintering.

In the following, embodiments of the invention will be explained in detail with reference to the drawings. The resulting from the drawings and the accompanying descriptions features are not limited to the respective embodiments. Nor are these features to be construed restrictively. Rather, these features serve to illustrate an exemplary implementation. In addition, the individual features with regard to possible further refinements and developments of the solution with each other as well as with features from the above description can be combined to form further embodiments, which are not shown in detail. Show it:

1 is a front view of a unit of a vane cell,

FIG. 2 is a perspective view of the unit shown in FIG. 1; FIG.

3 is a side view of the unit shown in FIG. 1,

4 shows a sectional view along the section line A - A in the direction of the arrows shown in FIG. 3, FIG. 5 shows a further sectional view along the section line A - A shown in FIG. 3, in the direction opposite to the direction of the arrows,

6 is a superposition of the two sectional views,

7 shows an exploded view of a first embodiment of an inner body in a first perspective view, FIG. 88 shows an exploded view of the first embodiment of the inner body in a second perspective view,

9 is a perspective view of the first embodiment of the inner body in an assembled state,

10 is a perspective view of a first element of the first embodiment of the inner body, 11 is a perspective view of a second element of the first embodiment of the inner body,

12 is an exploded view of a second embodiment of the inner body, FIG. 13 is a perspective view of the second embodiment of the inner body in an assembled state,

14 is a perspective view of a first element of the second embodiment of the inner body,

15 is a perspective view of a second element of the second embodiment of the inner body,

Fig. 16 is a perspective view of a known in the prior art

FIG. 18 is a perspective view of a third embodiment of the inner body in an assembled state; FIG. 19 is a perspective view of an element of the third embodiment of the FIG inside the body,

20 shows a perspective view of a fourth embodiment of the inner body in an assembled state,

21 is a perspective view of an element of the fourth embodiment of the inner body, and FIG. 22 is a front view of another unit of a vane-type adjuster

Planetary gears.

1 to 6 show an arrangement 2 of a preferably integrally formed outer body 4 and a multi-part inner body 6, which is preferably arranged coaxially inside lying to the outer body 4. The assembly 2 forms a unit of a hydraulic camshaft adjuster in the form of a so-called Flügelzellenverstellers. The outer body 4 is drivable by means of a crankshaft of an internal combustion engine, such as a gear drive, wherein a toothed belt drive or a chain drive is possible. The inner body 6, however, is firmly connected to a camshaft of the internal combustion engine, which is insertable into the circular recess 26. Under a solid compound is a positive and / or non-positive connection to understand. The outer body 4 comprises Preferably, five hydraulic chambers 18, which are formed by five radially inwardly projecting body portions 20 of the outer body 4. In the individual hydraulic chambers 18, a pivot wing 8 of the inner body 6 extends in the radial direction. The individual swing vanes 8 divide the individual hydraulic chambers 18 into a first working chamber 22 and a second working chamber 24. A drive torque of the crankshaft is transmitted to the camshaft adjuster by means of the outer body 4 introduced and transmitted via the working chambers 22, 24 on the inner body 6, which is fixedly connected to the camshaft.

The inner body 6 preferably comprises ten oil inlet and oil drain lines 14, 16, each extending preferably in the radial direction from an inner shell side 10 to a shell outer side 12 of the inner body 6 to one of the ten working chambers 22, 24, so that each of the five Hydraulikkammem 18th two of the ten oil inlet and Ölablaufleitungen 14, 16 are assigned. To generate a controlled hydraulic pressure in the lines 14 or 16 and in the associated working chambers 22, 24, the inner body 6 is pivoted relative to the outer body 4 for adjusting the camshaft in one direction. Such pivoting in the clockwise direction is illustrated in FIG. 6 by means of arrows, in which the lines 14 and the associated working chambers 22 are subjected to the controlled hydraulic pressure. The lines 14 in this illustration act as oil feed lines, while the lines 16 function as oil drain lines. The arrows shown in Fig. 6 further illustrate the flow direction of the oil. By generating a controlled hydraulic pressure in the respectively adjacent oil feed and drain lines 16 and in the associated working chambers 24, the inner body 6 is pivoted relative to the outer body 4 for adjusting the camshaft in the other direction. The lines 16 act as oil supply lines and the lines 14 as oil drain lines.

The individual hydraulic chambers 18 are designed to be concave in accordance with the circular movement described by the vanes 8, so that a pivoting movement of the inner body 6 relative to the outer body 4 can be initiated via the pivot vanes 8. When the outer body 4 is driven by the crankshaft, the pivoting vanes 8, which are movably guided in the individual receptacles 36, are pressed against the outer body 4 by the action of a centrifugal force, the individual working chambers 22, 24 being sealed against one another. The outer wing 4 facing pivot wing sides 8a are preferably flat, so that the sealing of the working chambers 22, 24 via a pressure of the respective longitudinal edges of the swing wing sides 8a takes place. Alternatively, the swing wing sides 8a may also be designed convex. Furthermore, to the individual

Schwenkflügelseiten 8a regardless of their planner or convex design and a sealing strip in a groove provided therefor. A corresponding

Sealing strip can also be arranged on the individual radial projections 21 of the outer body 4 in a groove provided for this purpose, so that the individual hydraulic chambers 18 are sealed against each other.

According to an alternative - not shown in the figures - embodiment of the invention, a spring between the outer body and the associated pivoting wing is arranged in the individual hydraulic chambers in one of two working chambers, which acts with respect to a pivoting of the inner body restoring.

The inner body 6 illustrated in Figs. 7-9, 12 and 13 is preferably assembled from a first element 28 and a second element 30 which describe a substantially hollow cylindrical core. FIGS. 7 to 9 illustrate a first embodiment of the inner body 6, while FIGS. 12 and 13 illustrate a second embodiment of the inner body 6. Both the outer body 4 and the two joined elements 28, 30 are preferably formed as sintered parts. The two elements 28, 30 have on facing end faces 38, 40 in each case five geometries 39, 41, 50, 52, which together with the respective other element 28, 30 form the oil inlet and oil drain lines 14, 16 of the inner body 6. In an advantageous embodiment of the invention it is provided that the two elements 28, 30 have a substantially radial extent over the circumference. According to the invention it is also provided that the two elements 28, 30 have a substantially axial extent over the circumference.

In this case, a geometry 39, 41, 50, 52 means a recess in the respective element 28, 30 extending from the shell inner side 10 to the outer shell 12 of the inner body 6, which does not penetrate the element 28, 30 in its longitudinal direction. The oil inlet and outlet lines 14, 16 preferably have a quadrangular cross-sectional shape, which is variable in terms of their dimensions in the first embodiment of the inner body 6 and initially increases in the radial direction from the inner shell side 10 and then up to the outer shell side 12th reduced. In addition, the geometries 39, 41 each have a curvature 39a, 41a, which, however, are irrelevant with regard to the mode of operation of the vane cell adjuster. Rather, such a configuration of the two elements 28, 30 is based in a design of a pressing tool, which aims to reinforce the pressing tool. The quadrangular cross-sectional shape of the second embodiment, however, is consistently constant with respect to its dimensions.

In the first embodiment of the inner body 6 (FIGS. 1 to 11), the element 28 comprises, on the front side or on the end faces 40 facing the element 30, five projections 34 which are each designed in the manner of a claw and which respectively correspond to one another Recess 32 of the element 30 engage positively. The projections 34 in each case form an interference fit with the associated recesses 32. The parting line formed by the two elements 28, 30 also closes hydraulically tight.

The individual preferably integrally formed pivoting vanes 8 are inserted into the inner body 6 on the outer side 12 of the casing. In this case, five preferably designed in the manner of a slot receptacles 36 are provided for the swing vanes 8, which are each formed on one of the projections 34 on the outer shell side 29 of the element 28. The receiving slots 36 are preferably aligned to the longitudinal direction of the inner body (6).

In the second embodiment of the inner body 6 (FIGS. 12 to 15), the element 28 comprises, on the front side or on the end face 40 facing the element 30, five projections 42 and five projections 44 which are each designed in the manner of a web or a feather key and which respectively engage in a corresponding recess or groove 46, 48 of the element 30 positively. The individual webs 42, 44 and recesses 46, 48 extend in the radial direction of the inner body 6. Analogous to the first embodiment, the projections 42, 44 in each case with the associated recesses 46, 48 each have a press fit. The parting line formed by the two elements 28, 30 also closes hydraulically tight. Furthermore, the two elements 28, 30 each comprise, on the front side, five grooves 50, each of which is assigned to one of them. Neten casing inside 33, 35 extend to an associated outer shell side 29, 31 and in the assembled state of the two elements 28, 30 form a quadrangular cross-sectional shape, which is invariable in terms of their dimensions in contrast to the first embodiment.

Furthermore, in contrast to the first embodiment, the individual slot receptacles 36 are designed in two parts. In this case, five receptacles 36a are provided on the outer shell side 29 of the element 28, while on the outer shell side 31 of the element 30 five receptacles 36b are provided, which terminate flush with the receptacles 36a.

Figures 16 and 17 illustrate a prior art embodiment of a one-piece inner body 6 sintered from a metal powder mixture. The oil inlet and outlet lines 14, 16 have been drilled into the inner body 6 following a sintering process. The bores 54, 56, 58 are provided for so-called spring-loaded and hydraulically unlockable locking pins, which engage in the bores 54, 56, 58 in order to prevent unwanted pivoting of the inner body 6 relative to an outer body, not shown.

An advantage of the proposed at least two-part design of the inner body 6, that in connection with the sintering production of such Innenköper standing spanende further processing - this includes a deburring of the holes - for the production of Ölzulauf- and oil drain lines deleted. On the contrary, these oil inlet and outlet lines are created by the joining together of the two elements 28, 30, which together form the inner body 6.

Furthermore, as a result of the thinner design of the two elements 28, 29b, 30 relative to a one-piece embodiment of the inner body (FIGS. 16 and 17), lower tolerances in the longitudinal direction of the inner body 28 are advantageously achieved with regard to a height dimension achieved when pressing metal powders into so-called green bodies , 29b, 30 reachable.

Fig. 18 illustrates a third embodiment of the inner body 6, in which the two assembled elements 29b - one of which is illustrated in Fig. 19 - are formed identically, and each preferably five from the shell inside 10 to the outer shell side 12 of the inner body 6 extending projections 64 which engage positively for connection of the two elements 29b in a corresponding recess 62 of the other element 29b and thereby form an interference fit with the associated recesses 62. In this case, the projections 64, together with the associated recesses 62, respectively form an oil inlet and oil discharge line 14, 16 of the inner part 6.

An advantage of this embodiment is that, in connection with the above-described sintered production of such internal bodies only a pressing tool is required to produce workpieces of the same configuration.

Fig. 20 illustrates a fourth embodiment of the inner body 6, after which also the two joined elements 29b are formed identically. FIG. 21 illustrates one of the two elements 29b. However, unlike the third embodiment of the inner body 6, instead of the slit-like receivers 36a, 36b of the respective elements 29b, swing vanes 8 formed integrally with the hollow cylindrical core of the respective element 29b are provided (FIG. 21). In this case, between one of the projections 64 and one of the recesses 62, one of the pivoting vanes 8 extends radially outward from the hollow cylindrical core of the inner body 6. The projections 64 and recesses 62 are configured analogously to the third embodiment of the inner body 6 (FIGS. 18 and 19).

Analogous to the fourth embodiment of the inner body 6 (FIG. 20), the embodiments described with reference to FIGS. 7 to 15-that is, the first and the second embodiment of the inner body 6-can alternatively be used instead of the slot-like receptacles 36, 36a, 36b be provided with one piece formed with the hollow cylindrical core of the respective inner body 6 pivoting wings.

FIG. 22 shows an alternative arrangement 2 of a preferably integrally formed outer body 4 and a preferably two-part inner body 6, which is preferably arranged coaxially inwardly to the outer body 4. The arrangement 2 preferably forms four hydraulic chambers 18, in each of which a pivoting wing 8 of the inner body 6 extends. The individual pivoting vanes 8 are preferably formed integrally with the hollow cylindrical core of the inner body 6. Zwi see the individual swing wings 8 and the outer body 4 is a planetary gear 68 a arranged, which is inserted into a pocket 70 a, which is formed on the pivoting wing 8. In this case, a corresponding to the planetary gear 68a gear segment 66 is formed at the respective individual planetary gears 68a associated body portions of the outer body 4, which cooperates with the planetary gear 68a. The individual planet gears 68a thereby seal the working chambers 22, 24 from each other hydraulically.

Furthermore, a planetary gear 68b is arranged on both sides of the respective hydraulic chambers 18 between the hollow cylindrical core of the inner body 6 and the outer body 4. The individual planet gears 68b are inserted into a pocket 70b which is formed on the respective radially inwardly projecting body portion 20 of the outer body 4. On both sides of the respective hydraulic chambers 18, a gear segment 72 is further formed on the hollow cylindrical core of the inner body 6, which is formed according to the associated planetary gear 68b and cooperates with this. The individual planet gears 68b each seal two adjacent hydraulic chambers 18 against each other hydraulically.

With regard to the two embodiments described above, reference is made to the already mentioned document DE 10 2004 047 817 B3 for further details, from which such an embodiment of a hydraulic camshaft adjuster in the form of a sash adjuster is known and which is hereby fully made part of the disclosure of the invention.

Claims

claims:

1. Hydraulic camshaft adjuster (2) for a camshaft of an internal combustion engine, with

a driven by a crankshaft of the internal combustion engine outer body (4) having at least one hydraulic chamber (18), and

an inner body (6) arranged inside the outer body (4), which is firmly connectable to the camshaft and has at least one pivoting wing (8) which extends in the radial direction into the hydraulic chamber (18, 24) and thereby engages the hydraulic chamber (18 ) in a first working chamber (22) and a second working chamber (24), wherein the inner body (6) has at least one Ölzulauf- and oil drain line (14, 16) extending from an inner shell side (10) to a shell outer side (12 ) of the inner body (6) and extends to one of the two working chambers (22), wherein to generate a controlled hydraulic pressure in the oil inlet and oil drain line (14, 16) and in one of the working chambers (22) of the inner body (6) opposite the outer body (4) is pivotable for the displacement of the camshaft,

characterized in that

the inner body (6) is joined together at least from a first element (28) and a second element (30), wherein the two elements (28, 30) each have at least one geometry (39, 39a) on mutually facing end faces (38, 40). 41, 41 a, 50, 52), which forms together with the respective other element (28, 30) the oil inlet and oil drain line (14, 16) of the inner part (6).

2. camshaft adjuster (2) according to claim 1, characterized in that at least one of the two elements (28, 30) frontally at least one projection (34, 42, 44), for connecting the two elements (28, 30) in a corresponding recess (32, 46, 48) of the other element (30) engages in a form-fitting manner and forms a press fit with the recess (32, 46, 48).

3. camshaft adjuster (2) according to claim 2, characterized in that the projection in the manner of a claw (34) is formed.

4. camshaft adjuster (2) according to claim 2, characterized in that the projection in the manner of a web (42, 44) is formed.

5. camshaft adjuster (2) according to one of claims 1 to 4, characterized in that the two elements (28, 30) over the circumference have a substantially equal radial extent.

6. camshaft adjuster (2) according to one of claims 1 to 5, characterized in that the two elements (28, 30) over the circumference have a substantially same axial extent.

7. camshaft adjuster (2) according to one of claims 1 to 6, characterized in that the two joined elements (29b) are identically formed and in each case at least one of the shell inside (10) to the outer shell side (12) extending projection (64 ) which positively engages in a corresponding recess (62) of the other element for the connection of the two elements (29b) and forms an interference fit with the recess (62), wherein the two projections (64) together with the associated recesses (64) 62) each form an oil inlet and outlet pipe (14, 16) of the inner part (6).

8. camshaft adjuster (2) according to one of claims 1 to 6, characterized in that extending the oil inlet and oil drain line (14, 16) in the radial direction of the shell inside (10) to the outer shell side (12) of the inner body (6) ,

9. camshaft adjuster (2) according to one of claims 1 to 8, characterized in that the oil inlet and ölablaufleitung (14, 16) has a quadrangular cross-sectional shape which is either constant or variable with respect to their dimensions.

10. camshaft adjuster (2) according to one of claims 1 to 9, characterized in that in the other working chamber (24) has a spring between the Au Ssen body (4) and the pivoting wing (8) is arranged, which acts with respect to the pivoting of the inner body (6) restoring.

11. camshaft adjuster (2) according to one of claims 1 to 10, characterized in that at least a first oil inlet and outlet pipe (14) and a second oil inlet and outlet pipe (16) are provided, wherein the first Ölzulauf- and Oil drain line (14) extends to one of the two working chambers (22), while the second oil inlet and oil drain line (16) extends to the other working chamber (24).

12. camshaft adjuster (2) according to one of claims 1 to 11, characterized in that the pivoting wing (8) is formed integrally with the inner body (6).

13. camshaft adjuster (2) according to one of claims 1 to 11, characterized in that the pivoting wing (8) on the outer shell side (12) in the inner body (6) is inserted.

14. camshaft adjuster (2) according to claim 13, characterized in that on the outer shell side (12) on at least one of the two elements (28, 30) has a receptacle (36) for the pivoting wing (8) is provided.

15. camshaft adjuster (2) according to claim 14, characterized in that on both elements (28, 30) has a receptacle (36 a, 36 b) for the pivoting wing (8) is provided.

16 camshaft adjuster (2) according to claims 14 or 15, characterized in that the receptacle (36) on the projection (34) is formed.

17. camshaft adjuster (2) according to one of claims 14 to 15, characterized in that the receptacle (36) is formed in the manner of a slot.

18. Camshaft adjuster (2) according to claim 17, characterized in that the slot-like receptacle (36) is aligned to the longitudinal direction of the inner body (6).

19. Camshaft adjuster (2) according to any one of claims 13 to 18, characterized in that the pivoting wing (8) in the receptacle (36) is movably guided.

20. camshaft adjuster (2) according to one of claims 1 to 19, characterized in that between the pivoting wing (8) and the outer body (4) a

Planetary gear (68a) is arranged, wherein on the outer body (4) to the planetary gear (68a) corresponding gear segment (66) is formed and wherein on the pivoting wing (8) a pocket (70a) is formed, in which the planetary gear (68a ) is used.

21 camshaft adjuster (2) according to one of claims 1 to 20, characterized in that between a hollow cylindrical core of the inner body (6) and the outer body (4) on both sides of the hydraulic chamber (18), a planetary gear (68 b) is arranged, wherein on both sides of the hydraulic chamber (18) on the hollow cylindrical core to the planetary gear (68b) corresponding gear segment (72) is formed and wherein on both sides of the hydraulic chamber (18) on the outer body (4) a pocket (70b) is formed in the the associated planetary gear (68b) is inserted.

22. Camshaft adjuster (2) according to one of claims 1 to 21, characterized in that the outer body (4) and the two assembled elements (28, 30) of the inner body (6) are formed as sintered parts.