Device and method for the closed-loop control of an exhaust gas turbocharger with variable turbine geometry

摘要

A device and a method for closed-loop control of at least a first exhaust gas turbocharger with variable turbine geometry. In this regard, a first closed-loop control system is provided for automatically controlling the charge air pressure, and a second closed-loop control system is provided for automatically controlling the turbine speed. The second closed-loop control system is subordinate to the first closed-loop control system. The correcting variable (SG 1 ) of the first closed-loop control system corresponds to the reference input of the second closed-loop control system.