METHOD FOR MONITORING THE WORKING OPERATION OF A PIEZO INJECTOR

The invention relates to a method for monitoring the working operation of a piezo injector, comprising the following steps: - measuring the control current and the control voltage of the piezo injector, - transforming the control current and the control voltage into the frequency range, - producing a complex conductance value from the control current transformed into the frequency range and the control voltage transformed into the frequency range, - determining one or more characteristic variables of the piezo injector from the complex conductance value, and - using the one or more characteristic variables for detecting a malfunction of the piezo injector. 本发明涉及种用于监控压电喷射器的工作操作的方法，其包括以下步骤：- 测量压电喷射器的控制电流和控制电压，- 将控制电流和控制电压转换成频率范围，- 从转换成频率范围的控制电流和转换成频率范围的控制电压生成复合电导值，- 从复合电导值确定压电喷射器的个或多个特性变量，及- 使用个或多个特性变量来检测压电喷射器的故障。