A continuous variable valve duration apparatus may include a camshaft, a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively, a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable, a plurality of inner brackets connected with the each wheel key and the each cam key, a plurality of slider housings of which the each inner bracket is rotatably inserted thereto, and movable up and down direction of an engine, a control portion selectively moving the slider housings to adjust relative position of a rotation center of the inner brackets and a guider guiding movement of the sliding housings.

A camshaft adjusting device of a drive, such as a motor vehicle drive, for example, for adjusting a phase position of a cam segment may include a camshaft and a phase shifter that is operatively connected to the camshaft. The camshaft may comprise a shaft segment including an inner shaft and an outer shaft at least partially surrounding the inner shaft. The camshaft adjusting device may further comprise a drive segment for driving the shaft segment and a cam segment that is connected in a form-fitting and/or force-fitting manner to the outer shaft. The phase shifter may comprise a rotor element and a stator element. A compensating element for compensating for part tolerances between the camshaft and the phase shifter can be disposed at least in sections between the rotor element and the drive segment.”

Shaft assemblies include an elongate shaft having a plurality of closely spaced apart external notches with wall segments having a greater outer diameter than an outer diameter of the notches residing therebetween and at least one self-retaining locking ring that engages one of the notches to axially lock into position on the shaft and provide a pull out force that is between about 100 lbf to about 1000 lbf. The notches can have a width that is between about 0.010 inches to about 0.020 inches, on average, and a depth that is between about 0.001 inches to about 0.010 inches, on average.

A camshaft adjusting device of a drive, such as a motor vehicle drive, for example, for adjusting a phase position of a cam segment may include a camshaft and a phase shifter that is operatively connected to the camshaft. The camshaft may comprise a shaft segment including an inner shaft and an outer shaft at least partially surrounding the inner shaft. The camshaft adjusting device may further comprise a drive segment for driving the shaft segment and a cam segment that is connected in a form-fitting and/or force-fitting manner to the outer shaft. The phase shifter may comprise a rotor element and a stator element. A compensating element for compensating for part tolerances between the camshaft and the phase shifter can be disposed at least in sections between the rotor element and the drive segment.

A camshaft adjuster has a stator, a rotor rotatable relative to the stator with a hub for receiving a camshaft. First supply ducts and second supply ducts penetrate the hub radially, and a separating sleeve inserted with an end section into the hub and forms an outer axial supply space and an inner supply space which is separate from the former, wherein the outer axial supply space is connected in flow terms to the first supply ducts and the inner axial supply space is connected in flow terms to the second supply ducts. On the outer shell, the separating sleeve includes a number of axial grooves at least partially forming the outer axial supply space connected to the first supply ducts. The separating sleeve includes a number of radial apertures which connect the inner supply space to a second supply line.

A cam shaft phase setter for adjusting the rotational angular position of a cam shaft relative to a crankshaft of an internal combustion engine by a hydraulic fluid, the cam shaft phase setter including: a stator connected to the crankshaft; a pressure chamber; a rotor connected to the cam shaft, the rotor being adjustable relative to the stator by introducing the fluid into the pressure chamber; a control valve including a valve housing and a valve piston; and an actuating unit for axially adjusting the valve piston; wherein the cam shaft phase setter is configured such that fluid flowing through the control valve flows back into an engine housing which rotatably mounts the cam shaft.

A cam shaft phase setter for adjusting the rotational angular position of a cam shaft relative to a crankshaft of an internal combustion engine by means of a hydraulic fluid, the cam shaft phase setter including a stator which can be rotary-driven by the crankshaft; a pressure chamber for the fluid; a rotor which is connected, rotationally fixed, to the cam shaft and coupled to the stator such that torque is transmitted and which can be adjusted in its rotational angle relative to the stator by introducing the fluid into the pressure chamber; a control valve including a valve housing and a valve piston; the valve housing including a housing inlet, an operating port to the pressure chamber and a reservoir port to a reservoir for the fluid and being connected, rotationally fixed, to the cam shaft or being formed by the cam shaft; the valve piston being axially adjustable back and forth in the valve housing between a first position and a second position and including a piston feed which is connected to the housing inlet and is connected to the operating port in the first position of the valve piston and separated from the operating port in the second position of the valve piston; an actuating unit, coupled to the valve piston, for axially adjusting the valve piston; and a feedback through which fluid which flows through the valve housing can be fed back into an engine housing of the internal combustion engine which rotatably mounts the cam shaft; wherein the cam shaft phase setter is configured such that the fluid flowing through the control valve flows back into the engine housing through one or more components of the phase setter which rotate with the cam shaft.

A valve timing control system includes: a check valve which is provided between an oil pump driven by the engine, and the lock release passage; an electromagnetic valve which is disposed between the check valve and the lock release passage; an accumulator disposed between the check valve and the electromagnetic valve; and a passage which is disposed between the check valve and the electromagnetic valve, in which the flow of the oil is stored, and which is arranged to release the restriction of the lock mechanism by a pressure of the accumulator by energizing the valve driving solenoid of the electromagnetic valve.

The present invention relates to an adjustable camshaft for the valve gear of an internal combustion engine having an outer shaft, on which at least one first cam is arranged which is connected fixedly to said outer shaft so as to rotate with it, and having an inner shaft which extends through the outer shaft and to which at least one second cam is connected fixedly so as to rotate with it and is mounted rotatably on the outer shaft, and it being possible for oil to be conducted from a gap between the outer shaft and the inner shaft through an oil duct in the outer shaft into the region between the second cam and the outer shaft. According to the invention, the second cam is sealed at least partially against the outer shaft by means of at least one sealing element.

A camshaft includes a carrier shaft which can be mounted rotatably along a shaft axis and at least one cam pack disposed axially displaceably on the carrier shaft. The cam pack includes at least two cams and at least one adjusting member for axial adjustment of the cam pack. The cams and the at least one adjusting member are connected to one another in an axially adjacent configuration and can be mounted axially displaceably as a composite structure in a direct configuration on the carrier shaft. A method for producing a camshaft and a cam pack are also provided.