Verfahren zur Beheizung eines Drosselklappenstutzens

摘要

In the inlet manifold (10) the throttle flap (12) is pivotable about its axis (14) by an electric motor (16) supplied with current via wires (24) from a controller (18). Heat losses in the motor are increased by a sequence of pulses at such a high repetition rate that it cannot react mechanically. The heating is limited by a signal to the controller from a temp. sensor in the immediate vicinity of the motor, measuring e.g. the resistance of its winding.