METHOD AND ARRANGEMENT FOR DIAGNOSING A CAPACITIVE ACTUATOR

摘要

A diagnosis of an actuator (P) is carried out by supplying a predetermined energy to the actuator (Pm) via a transfer circuit (Us). The actuator voltage (up) and the actuator current (ip) or the actuator charge (Qp) are used to determine the presence of defective function states of the actuators (Pm) and its supply lines, transient or permanent interruptions, short circuits inside the actuator (Pm) or its supply lines or too low capacitance values, by analysing the deviation of the values that are detected from predetermined comparative values.