Device to control a piezoelectric actuator

Details Device to control a piezoelectric actuator Device to control a piezoelectric actuator

2006-04-25

2006-04-25

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S316030

Reexamination Certificate

active

07034436

ABSTRACT:
A device for controlling a piezoelectric actuator (Cp), in particular for a fuel-injection valve of an internal combustion engine, comprises an energy source (EQ), which supplies the actuator (Cp) with energy (E0), whereby the extension of the piezoelectric actuator (Cp) corresponds with a predetermined response to changes in temperature. A compensation capacitor (C0) is connected in parallel to the piezoelectric actuator (Cp). The capacitance of said capacitor is calculated in such a way that the extension (Cp) of the actuator remains approximately constant over the temperature range, when supplied with a constant amount of energy (E0) by the energy source (EQ).

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International PCT Search Report for application No. PCT/DE03/01613, 7 pages.
International PCT Search Report for application No. PCT/DE02/01029, 7 pages.

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