Pre-treatment method for an electromechanical transducer
AssigneeSiemens Aktiengesellschaft
InventorClaus Zumstrull
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Abstract
The pre-treatment method for an electromechanical transducer is particularly suitable for polarizing a piezoelectric actuator for an injection system of an internal combustion engine. Prior to the actual operation, the transducer is actuated with an electrical pre-treatment signal, in order to set a predefined operating point in accordance with the pre-treatment signal. The pre-treatment signal corresponds substantially to the electrical actuation signal during normal operation of the transducer, in order to prevent a displacement of the pre-set operating point during normal operation of the transducer.
Claims10
A pre-treatment method for an electromechanical transducer in a piezoelectric actuator for an injection system of an internal combustion engine, which comprises the following method steps:
- prior to an actual operation of the electromechanical transducer, actuating the transducer with an electrical pre-treatment signal to set a predefined operating point in accordance with the pre-treatment signal;
- and thereby setting the pre-treatment signal to a pulse sequence having a pulse length in a range between 0.1 ms and 2 ms, substantially corresponding with an electrical actuation signal during normal operation of the transducer, in order to prevent a displacement of a pre-set operating point during the normal operation of the transducer.
Dependencies are inferred from the claim text.