Abstract: A camshaft adjuster (1) for driving and/or adjusting a camshaft (2) of an internal combustion engine, including a stator (3) and a concentric rotor (6) which is arranged within the stator in a rotatable manner. At least the stator (3) has a central receiving area (31) for receiving the camshaft (2), and at least one projection (13) which protrudes radially inwards is provided on a radial inner edge (12) of the central receiving area (31) in order to engage behind a camshaft (2) connecting piece (20) which protrudes radially outwards. A camshaft adjuster/camshaft combination (26) including such a camshaft adjuster (1) and a camshaft (2) which has a connecting piece (20) that projects radially. The projection (13) preferably engages behind the connecting piece (20). A method for assembling the camshaft adjuster/camshaft combination (26) is also provided.

Abstract: A camshaft adjusting device, including a camshaft (1) and a camshaft adjuster (2) having a stator (5) that can be connected to a crankshaft of an internal combustion engine and a rotor (4) that is rotatably mounted in the stator (5) and can be connected to the camshaft (1) and a clamping device (3) for clamping the rotor (4) to the camshaft and a rolling bearing (8) absorbing both axial and radial forces for mounting the camshaft adjusting device in a stationary housing (11), wherein the rotor (4) is clamped to the camshaft (1) by the clamping device (3) via an inner ring (12) or an outer ring (13) of the rolling bearing (6).

Abstract: A camshaft adjusting device for an internal combustion engine including: a vane-type adjuster actuable by a pressure medium and which is rotationally fixed to a camshaft by a rotor and rotationally fixed to a crankshaft by a stator; a central valve has a displaceable valve body, by which a pressure medium is fed to the vane-type adjuster via a pump from a reservoir, the medium being selectively introduced into different working chambers and fed back from other working chambers to the reservoir, depending on the position of the valve body. The device includes a rolling bearing, by which the end section of the camshaft facing the vane-type adjuster is mounted in relation to a fixed housing wall. An axially oriented through-flow opening extends through the rolling bearing through which the pressure medium delivered by the pressure flows in an axial direction to the central valve.

Abstract: A camshaft adjusting device for an internal combustion engine including: a rotor that can be rotationally fixed to a camshaft of the internal combustion engine; a pot-shaped stator that encompasses the rotor and can be driven by a crankshaft; and an annular chamber situated between the stator and the rotor and subdivided into multiple pressure chambers by stator ribs that are located on the stator and that extend up to the rotor. Each pressure chamber is subdivided into two working chambers (A,B) by vanes provided on the rotor. The device also includes a central valve (1) which has a displaceable valve body (2), by which a pressure medium that is fed via a pressure medium pump (P) from a pressure medium reservoir (T) can be selectively introduced into the working chambers (A,B) on one side of the vanes and can be fed back from the working chambers (A,B) on the other side of the vanes to the pressure medium reservoir (T), depending on a position of the valve body (2).

Abstract: A device for changing the relative angular position of a camshaft with respect to a crankshaft of an internal combustion engine, wherein the drive element is rotatably mounted with respect to the crankshaft and is driven by the camshaft. Between the drive element and the camshaft at least two hydraulic chambers are formed, wherein the hydraulic chambers can be pressurized with a pressurized fluid in order to set a defined relative rotational position between the drive element and the camshaft. The device includes a housing element, wherein a pressure reservoir having a pressure chamber for pressurized fluid is arranged on the housing element and wherein the basic form of the pressure reservoir is substantially cylindrical.

Abstract: A hydraulic camshaft adjuster (1) including a stator (2) and a rotor (3) arranged such that it can rotate relative thereto, the stator (2) being connected to at least one separate cover (7) that seals a cavity (11) located between the rotor (3) and the stator (2). In the region of the cover (7), the material of the stator (2) at least partially encompassing said cover (7) is formed without machining.

Abstract: A camshaft phaser for an internal combustion engine having—a stator (1) driven by a crankshaft of the internal combustion engine; a rotor (3) connected to the camshaft (24) for co-rotation therewith; and working chambers, which are configured between the stator (1) and the rotor (3) and which are subdivided into pressure chambers (A, B) by vanes (18) that are associated with the rotor (3); and—a pressure medium circuit having a plurality of pressure medium channels (A1, B1, C1, E1) that fulfill different functions, at least two of the pressure medium channels (A1, B1, C1, D1) merging into one another in one section (14); and one of the pressure medium channels (A1, B1, C1, D1) being separated in a pressure medium-tight manner from the other pressure medium channel (A1, B1, C1, D1) by a guide sleeve (13) that is inserted into the section (14).

Abstract: A camshaft adjuster (1) including a stator (2) and a rotor (4), a spring (6) tenses the rotor (4) rotationally counter to the stator (2). According to the invention, the spring is a helical spring (6), the stator (2) includes a first recess (8) of a first free end (10) of the helical spring (6) and the rotor (4) includes a second recess (12) for a second free end (14) of the helical spring (6).

Abstract: A camshaft adjusting system (1) having a camshaft adjuster (2) and a camshaft (3), wherein the camshaft adjuster (2) has a drive element (4) and an output element (5) which is disposed so as to be pivotably movable with respect to the drive element (4), wherein the output element (5) is non-rotatably connected to the camshaft (3), wherein a cover element (6) is fastened non-rotatably to the output element (5) and the hub (9) of the cover element (6) is disposed between the output element (5) and the camshaft (3), wherein the radial direction of extension of the cover element (6) is greater than the diameter of the contact surface (10) of the hub (9) of the cover element (6) to the camshaft (3).

Abstract: A control valve (4) for controlling pressure medium flows of a camshaft adjuster, which control valve includes a substantially hollow cylindrical control sleeve (6), which is disposed inside a casing (8), and a control piston (12) which is guided axially displaceably inside the control sleeve (6) against the spring force of a spring element (14), the control sleeve (6) having at one axial end a base (22) which serves as an axial contact surface for the spring element (14).

Abstract: A camshaft phaser, including a stator (1) that can be driven via a crankshaft of an internal combustion engine, and a rotor (2) that can be non-rotatably joined to a camshaft of the internal combustion engine, and a torsion spring (5) that has helical windings and that acts between the rotor (2) and the stator (1) and whose first radially inner end (7) is directly or indirectly joined to the rotor (2), and whose second radially outer end (8) is directly or indirectly joined to the stator (1), whereby a central, axially protruding pipe section (19) associated with the rotor (2) is provided, and the first end (7) of the torsion spring (5) is non-rotatably affixed with a positive fit to the pipe section (19).

Abstract: A control valve for a hydraulic device, in particular central valve of a camshaft adjuster system for reciprocating-piston internal combustion engines, having a valve sleeve (1) which projects into a cavity of a camshaft (8), wherein a displaceable control piston (3) is arranged in the valve sleeve (1), which control piston is subjected to load on one side by a spring (4) which is adjoined by a pressure medium line. The cavity of the camshaft (8) is connected to a pressure medium supply channel of the reciprocating-piston internal combustion engine via at least one supply line (16) in the camshaft (8) and via a bearing, and the pressure medium line is in the form of a pressure medium feed line and the pressure medium feed line is connected to the pressure medium supply channel of the reciprocating-piston internal combustion engine via a pressure line (12) in the camshaft (8) and via the bearing.

Abstract: A pressure accumulator for a camshaft phaser of an internal combustion engine, including a housing that accommodates a piston and forms a cavity fillable with a hydraulic fluid. The cavity is configured as a hole and is closed by a cover on at least one side so as to be fluid-tight, whereby the cover is fastened to the housing by a flanged connection. A method for the production of a pressure accumulator for a camshaft phaser, including a pressure accumulator that forms a cavity, whereby a piston is placed into the cavity, and subsequently, a cover is put in place over the cavity—sealing it off towards the outside—in such a way that a material portion of the housing or of the cover creates such a positive connection between the cover and the housing that the cover is affixed in its position relative to the housing.

Abstract: A camshaft adjusting device, including a camshaft (1) and a camshaft adjuster (2) having a stator (5) that can be connected to a crankshaft of an internal combustion engine and a rotor (4) that is rotatably mounted in the stator (5) and can be connected to the camshaft (1) and a clamping device (3) for clamping the rotor (4) to the camshaft and a rolling bearing (8) absorbing both axial and radial forces for mounting the camshaft adjusting device in a stationary housing (11), wherein the rotor (4) is clamped to the camshaft (1) by the clamping device (3) via an inner ring (12) or an outer ring (13) of the rolling bearing (6).

Abstract: A control valve (1) of a camshaft adjuster, which has a housing (2) having three pin openings (5a, 5b, 5c), spaced apart axially from each other, wherein two pin openings (5a, 5b) are each connected to the tank connection (T) in two axial positions of the control piston (4) and the third pin opening (5c) is not connected to the tank connection (T) in a third axial position of the control piston (4) in a fluid-conducting manner.

Abstract: A camshaft adjuster (1) including a hub (2) for securing the camshaft adjuster (1) to one end (3) of a camshaft (4) is provided. The camshaft adjuster (1) includes a drive element (8) and an output element (9). An outer cover surface (5) of one section (6) of the hub (2), which faces the camshaft, is designed as a bevel surface (7) which protrudes from the camshaft adjuster (1) and can be brought into contact with a complementary bevel surface (24) of the end of the camshaft (3).

Abstract: A camshaft unit includes a camshaft having a radial channel, a hydraulic phase setting device communicating with the radial channel for adjusting the phase length of the camshaft with respect to a crankshaft via hydraulic pressure medium and a pressure medium channel embodied as a solid cylinder head component. To transfer a pressure medium, at least one pressure medium transfer element is formed between the pressure medium channel and the radial channel. The pressure medium transfer element includes a ring channel including a ring channel opening extending in the peripheral direction of the ring channel and including a radial channel opening leading into a radial channel and opposite the ring channel opening. The pressure medium channel communicates with the radial channel via the ring channel opening and the radial channel opening.

Abstract: A camshaft adjusting device, including a vane cell adjuster is provided. The vane cell adjuster includes a stator-that can be connected to a crankshaft of an internal combustion engine, a rotor, which is rotatably supported in the stator and can be connected to a camshaft and has a plurality of working chambers, which are provided between the stator and the rotor and to which a pressure medium can be applied, and a central screw for clamping the rotor to the camshaft by clamping surfaces of the rotor and of the camshaft facing each other. At least one of the clamping surfaces of the rotor and/or of the camshaft is profiled at least in some sections in order to create a form-closed connection.

Abstract: A device for changing the relative angular position of a camshaft with respect to a crankshaft of an internal combustion engine, wherein the drive element is rotatably mounted with respect to the crankshaft and is driven by the camshaft. Between the drive element and the camshaft at least two hydraulic chambers are formed, wherein the hydraulic chambers can be pressurized with a pressurized fluid in order to set a defined relative rotational position between the drive element and the camshaft. The device includes a housing element, wherein a pressure reservoir having a pressure chamber for pressurized fluid is arranged on the housing element and wherein the basic form of the pressure reservoir is substantially cylindrical.

Abstract: A camshaft phaser for an internal combustion engine having—a stator (1) driven by a crankshaft of the internal combustion engine; a rotor (3) connected to the camshaft (24) for co-rotation therewith; and working chambers, which are configured between the stator (1) and the rotor (3) and which are subdivided into pressure chambers (A, B) by vanes (18) that are associated with the rotor (3); and - a pressure medium circuit having a plurality of pressure medium channels (A1, B1, C1, E1) that fulfill different functions, at least two of the pressure medium channels (A1, B1, C1, D1) merging into one another in one section (14); and one of the pressure medium channels (A1, B1, C1, D1) being separated in a pressure medium-tight manner from the other pressure medium channel (A1, B1, C1, D1) by a guide sleeve (13) that is inserted into the section (14).