Patent ID: 7059285

Claim:
A control structure of an electric camshaft adjuster ( 6 ) for achieving a desired adjusted rotational speed in an adjusting motor ( 8 ) for a camshaft ( 5 ) of an internal combustion engine ( 1 ), the control structure comprising: at least one controller ( 19 , 22 , 19 ′) which generates control signals for the adjusting motor ( 8 ) from measurement signals of the internal-combustion engine ( 1 ), an input signal of the controller ( 19 , 22 , 19 ′) is a difference signal derived from a desired and an actual value and an output signal is a controlled desired adjusted rotational speed signal defined for the adjusting motor ( 8 ), to which an uncontrolled rotational speed signal is added, the at least one controller further including a position control, which refers to the camshaft adjusted angle, and a rotational speed control, which refers to the adjusting motor rotational speed, wherein the position control and rotational speed control comprise at least one of a P, PI, PID, prediction and monitoring controller, and the at least one controller further including a prediction controller ( 22 ) that sets an adjusted rotational speed that can be delayed by the adjusting motor ( 8 ) in an available time period, depending on an appropriate adjusted angle jump of the camshaft ( 5 ).