Abstract

For best application of piezo actuators in motor vehicles new development tools and applications have been developed at the Institute for Electronic Circuits and Measurement of the Ruhr-Universitat Bochum. An exact model of piezo actuators allows accurate simulation and optimization in the early development phase for the entire injection system including electrical, mechanical and hydraulic equipment. Using the piezo element simultaneously as both an actuator and a sensor, the compensation of disturbances such as temperature, pressure variation and also wear-out is possible. Furthermore, continuous observation of the mechanical conditions within the injector is now made possible.

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