Patent ID: 8453615

Claim:
An adjustable camshaft, comprising: an inner shaft, an outer shaft, and cams, the inner shaft and outer shaft fixedly connected to the cams that are rotatable relative to one another to create a relative movement, wherein the cams belonging to the inner shaft are fixedly connected to the inner shaft in each case by a pin connection, an actuating device provided at an end of the camshaft to generate the relative movement, in which the actuating device at least one rotor is rotatable relative to a stator, with the at least one rotor being fixedly connected in each case to one of the inner shaft and the outer shaft, wherein the camshaft is part of a prefabricated camshaft assembly which comprises at least the following components which are in alignment relative to one another: the camshaft with the inner shaft, and the outer shaft, the cams, the actuating device, and a sprocket; wherein at least one control valve for activating the rotor and the stator is arranged at a longitudinal end side in the inner shaft and within the actuating device; and wherein a hydraulic duct which supplies the control valve is arranged in regions in the inner shaft and, at an end remote from the actuating device, is guided radially outward through the outer shaft.