Adjustment mechanism for an inlet flow section of a compressor wheel of a turbocharger

An adjustment mechanism for an inlet flow section of a compressor wheel of a turbocharger for defining a variable inlet diameter for an axial air flow to the compressor wheel, the adjustment mechanism comprising:

• an unison ring arranged in the air inlet flow section prior to the compressor wheel in a direction of the axial air flow;
• a plurality of vanes being pivotably mounted and mechanically linked to the unison ring;
• an actuator for providing a first pivoting motion to the unison ring about a central axis and thereby providing a second pivoting motion to the plurality of vanes which set the variable inlet diameter;
• and
• at least one elastic biaser arranged between the unison ring and at least one of the plurality of vanes such that the elastic biaser provides, upon the first pivoting motion to the unison ring, a restoring force to the unison ring and the at least one of the plurality of vanes.