The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2006
Filed:
Sep. 22, 2003
Eric Chemisky, Lauterbourg, FR;
Walter Schrod, Regensburg, DE;
Eric Chemisky, Lauterbourg, FR;
Walter Schrod, Regensburg, DE;
Siemens Aktiengesellschaft, Munich, DE;
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 (E), whereby the extension of the piezoelectric actuator (Cp) corresponds with a predetermined response to changes in temperature. A compensation capacitor (C) 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 (E) by the energy source (EQ).