Actuator and exhaust gas recirculation valve, wastegate or variable turbine geometry device of a turbocharger comprising an actuator

An actuator for an exhaust gas recirculation valve, wastegate or variable turbine geometry device of a turbocharger, comprising:

• a drive;
• at least one rotatable threaded element;
• at least one output element that can be driven in translation thereby, wherein the threaded element has at least two regions of differing pitch and a rotational axis of the threaded element is inclined relative to a translational axis of the output element;
• wherein the two regions of differing pitch comprise a finer pitch region and a coarser pitch region, wherein the coarser pitch region is located at a rotation that begins at between 130 to 170 degrees and extends to at least 300 degrees relative to a starting position at a first end of a thread of the threaded element, wherein the finer pitch region extends between a starting position at a first end of a thread of the threaded element and an ending position of between 40 and 70 degrees;
• and
• a transition region defined by a transition pitch that extends between the finer pitch region and the coarser pitch region, wherein the transition pitch increases continuously from the finer pitch region to the coarser pitch region.