Abstract: A volume store which has a substantially hollow cylindrical housing and a separating element displaceably disposed within the housing. The housing is fixedly disposed within a hollow chamber of a camshaft.

Abstract: A stator (20) for a camshaft adjuster (4). The stator (20) has an outer part (50) for concentrically holding a rotor (22) with vanes (34) arranged around the rotor (22) and a segment (52) projecting from the outer part (50) for engaging between two vanes (34) of the rotor (22), in order to form, together with the two vanes (22), pressure chambers (44) of the camshaft adjuster (4). Here, the segment (52) has a cavity (70) for holding a hydraulic fluid from the pressure chambers (44).

Abstract: A camshaft adjuster having a first component, a second component rotatable relative to the first component within an angular range, and a locking device for locking the first component relative to the second component. The locking device includes a first locking bolt and a second locking bolt on the first component and a central slotted guide on the second component, and wherein the two locking bolts are movably guided between a locking position and an unlocking position and engage in the central slotted guide in a central angular position relative to one another in their locking position. At least one terminal slotted guide, in which the first locking bolt or the second locking bolt engages in its locking position in a terminal angular position differing from the central angular position of the components, is arranged on the second component.

Abstract: A hydraulic camshaft adjuster-having a stator drivable by the internal combustion engine and having a rotor connectable to a camshaft, wherein the rotor is fixed releasably to the stator via at least one first pin-like locking pin in a rotationally fixed manner in a centre position counter to a first rotational direction. The locking pin is designed for moving into and moving out of a first slotted guide in a first axial direction defined by the rotational axis of the stator and/or of the rotor. A second locking pin can be moved in a second axial direction parallel to the first axial direction but in a different direction, into a second slotted guide, so as to secure the rotor relative to the stator in a centre position counter to a second rotational direction in a different direction to the first rotational direction, and can be moved out of the second slotted guide.

Abstract: A fastening arrangement (1) to connect a camshaft phaser (2) to an end (3) of a camshaft (24) is provided, whereby the camshaft phaser (2) has a hub (4) that is connected to the camshaft end (3) by a fastening screw (5), whereby the hub (4) has an inner conical surface (6) that tapers away from the camshaft phaser (2), and a clamping element (7) is affixed between this inner conical surface (6) and the fastening screw (5), whereby the fastening screw (5) clamps the hub (4) to the camshaft end (3) via the clamping element (7).

Abstract: An arrangement of a camshaft phaser (1) which allows a variable pressure boost in that a rotary piston (7) of the camshaft phaser (1) either creates or eliminates a fluid connection between a first pair of working chambers and a second pair of working chambers arranged in the axial direction (23).

Abstract: A directional valve (30) for controlling a hydraulic oil flow from a pressure port (34) via working chambers of a camshaft adjuster (4) to a tank port (58). The directional valve (30) includes an accumulator port (36) for conducting at least a part of the hydraulic oil flowing out of a working chamber into a volume accumulator (54) before said hydraulic oil flows out into the tank port (58), and the accumulator port (36) is connected via a passage (60) to the pressure port (34).

Abstract: A camshaft adjuster having a first component, a second component rotatable relative to the first component within an angular range, and a locking device for locking the first component relative to the second component. The locking device includes a first locking bolt and a second locking bolt on the first component and a central slotted guide on the second component, and wherein the two locking bolts are movably guided between a locking position and an unlocking position and engage in the central slotted guide in a central angular position relative to one another in their locking position. At least one terminal slotted guide, in which the first locking bolt or the second locking bolt engages in its locking position in a terminal angular position differing from the central angular position of the components, is arranged on the second component.

Abstract: A directional control valve (2) for controlling a flow of hydraulic oil from a pressure connection (80) via work chambers of a camshaft adjuster (90) to a tank connection (88). The disclosed directional control valve (2) includes an accumulator connection (86) for guiding at least a part of the hydraulic oil flowing out from a work chamber into a volume accumulator (126) before the discharge into the tank connection (88).

Abstract: A camshaft adjuster (4) including a stator (20) and a rotor (22) which is received in the stator (20) and which can be rotated relative to the stator (20) by a pressure chamber (44), a pressure interface (46, 80) for supplying hydraulic liquid to the pressure chamber (44), and an outflow interface (78) for the discharge of the hydraulic liquid from the pressure chamber (44). The camshaft adjuster (4) also has a third interface (82) for filling the pressure chamber (44) with hydraulic liquid from a volume accumulator (47).

Abstract: A camshaft adjuster which has a control valve and at least one pressure-controlled positioning valve which is connected to a pair of control chambers. The control chambers each have an early chamber and a late chamber and one of the control chambers is designed in such a manner that, in an unenergized basic position of the control valve, in order to set a middle position, the smaller of the early and late chambers of the one of the control chambers is connected to a supply line and the larger of the early and late chambers of the one of the control chambers is connected to a removal line.

Abstract: A pressure storage unit (2) for a camshaft, having an integrated controllable pressure storage device for supporting hydraulic engine components, which includes a housing (4) with a piston (14) mounted movably therein having a piston floor (18), and a spacer element (28) being provided on the piston floor (18).

Abstract: A pressure accumulator includes a housing having a housing cavity, a piston axially displaceable in the housing cavity between a first final position and a second final position and having a pressure surface which together with a wall of the housing cavity delimits at least partially a reservoir connectable to an ICE consumer in a fluid-conveying manner, an energy store cooperating with the piston, the piston being displaceable against the force of the energy store from the first final position into the second final position in that the reservoir is acted on by pressure using a pressure medium, and a locking device for locking the piston in the second final position. A locking tube is connected to the piston and supported within the housing in an axially shiftable manner, and lockable at an end of the housing facing away from the reservoir with the aid of a locking pin.

Abstract: A camshaft adjuster (2) having a vane-type design with a stator (4) and a rotor (6), which can be rotated relative to the stator (4), and at least two pressure chambers (8a, 8b) formed between the stator (4) and the rotor (6). The pressure chambers (8a, 8b) are separated from each other by a radially oriented vane (12) of the rotor (6), wherein the pressure chambers (8a, 8b) can be alternately supplied with a pressure medium. The vane (12) has a radial face (20) and two lateral faces (20) that are directed toward the pressure chambers (8a, 8b). The radial face (20) is sealed by a U-shaped sealing element (26) having a main limb (30) and two side limbs (32) seated against the lateral faces (22). The pressure chambers (8a, 8b) of the camshaft adjuster (2) are sealed particularly reliably by designing check valves (28) on the side limbs (32) of the sealing element (26) and by designing, on the lateral faces (22) of the vane (12), outlets for the pressure medium with which the check valves (28) are associated.

Abstract: A camshaft adjustor (4), for an internal combustion engine (2), the camshaft adjustor having a stator (20), a rotor (22) which is rotatably accommodated in the stator (20), a pressure chamber (44) for adjusting the rotor (22) in relation to the stator (20) and a volume reservoir (70) for equalizing a negative pressure in the pressure chamber (44) via a channel (88) between the pressure chamber (44) and the volume reservoir (70). A non-return valve (72) having a closure part (102) for blocking a channel (88) which opens a volume reservoir (70) into a pressure chamber (44) in a camshaft adjustor (4), wherein the non-return valve (72) is formed of a metal sheet and the closure part (102) is realized so as to be movable in a recess (98) of the metal sheet (92) with two oppositely situated ends (94, 96) which are bent toward each other.

Abstract: A camshaft adjuster (4) for a camshaft (12) of an internal combustion engine (2). The camshaft adjuster (4) includes a stator (20), a rotor (22) housed concentrically in the stator (20) and mounted rotatably about a rotational axis (78) relative to the stator (20), and a volume accumulator (70) for receiving a hydraulic fluid from a pressure chamber (44) formed between the rotor (22) and the stator (20). The volume accumulator (70) has an outlet (76) in a direction of the rotational axis (78).

Abstract: A camshaft adjuster with a drive element, a driven element, and a pressure chamber formed between the drive element and the driven element for generating a relative rotation between the driven element and the drive element, and a volume accumulator that is arranged in the camshaft adjuster and supplies hydraulic medium via a channel from the volume accumulator to the pressure chamber if there is an under-pressure in the pressure chamber. The camshaft adjuster has a non-return valve with a closing part for closing an opening of the channel, the non-return valve allows a flow of hydraulic medium through the channel from the volume accumulator to the pressure chamber, and there is an elastically expandable component that projects into the channel and can be guided by the channel and is connected to the closing part and is provided for applying tension for pulling the closing part into the channel.

Abstract: A control valve for controlling pressure medium flows, which has a cylindrical valve housing with a housing cavity The housing cavity is open at one side and has an axial outflow port, a radial first working port, a radial second working port, a radial third working port and two radial pressure ports which each open into the housing cavity. A first pressure port is arranged axially between the first working port and the second working port, and a second pressure port is arranged axially between the second working port and the third working port. Also, the control valve has a cylindrical control piston, which is axially movable within the housing cavity and has a piston cavity open at one side in the direction of the outflow port.

Abstract: A pressure accumulator arrangement in a camshaft for a camshaft adjusting system of an internal combustion engine, having at least one pressure accumulator and at least one control valve, characterized in that the pressure accumulator and control valve are connected to form a structural unit.

Abstract: A camshaft adjustment mechanism is provided having a rotor adapted to be connected to a camshaft, a stator arranged around the rotor, and a cover associated with the stator. An advance chamber and a separate retard chamber are formed between the rotor and the stator and separated from each other by a vane extending from the rotor. The camshaft adjustment mechanism further includes a locking apparatus adapted to lock the rotor from rotation. A first oil control valve is associated with the advance chamber and the retard chamber to control oil flow to the advance chamber and the retard chamber. A second oil control valve is associated with the locking apparatus to control oil flow to the locking apparatus.