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:
Aug. 19, 2008
Filed:
Mar. 26, 2005
Jörg Beilharz, Berlin, DE;
Sven Rebeschiess, Kleinmachnow, DE;
Christian Rissler, Berlin, DE;
Hans-jörg Wiehoff, Regensburg, DE;
Jörg Beilharz, Berlin, DE;
Sven Rebeschiess, Kleinmachnow, DE;
Christian Rissler, Berlin, DE;
Hans-Jörg Wiehoff, Regensburg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In a method for determining the closure time for a valve, operated by a piezoelectric actuator, in order to record the closing time, the voltage at the piezoelectric actuator is recorded and the time is recorded at which the voltage has a maximum difference value from a comparison curve. The difference curve is generated between a start and an end point for a measured curve, having the voltage values applied to the piezoelectric actuator. A precise determination of the closing time can thus be carried out.