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:
Oct. 02, 2007
Filed:
Jun. 15, 2006
Jörg Beilharz, Berlin, DE;
Maximilian Kronberger, Regensburg, DE;
Richard Pirkl, Regensburg, DE;
Christian Ribler, Berlin, DE;
Harald Schmidt, Vienna, AT;
Hans-jörg Wiehoff, Regensburg, DE;
Jörg Beilharz, Berlin, DE;
Maximilian Kronberger, Regensburg, DE;
Richard Pirkl, Regensburg, DE;
Christian Ribler, Berlin, DE;
Harald Schmidt, Vienna, AT;
Hans-Jörg Wiehoff, Regensburg, DE;
Siemens AG, Munich, DE;
Abstract
A valve has a piezoelectric actuator with a valve element, a valve body and a valve seat. In order to control the valve, the valve element is moved into the valve seat from a position remote from the valve seat by means of a charging process at a prescribable first time. A first value is determined being characteristic of the electrical power supplied to the piezoelectric actuator when the valve element meets the valve seat. A second value is determined being characteristic of the electrical power supplied to the piezoelectric actuator when the charging process of the piezoelectric actuator is concluded. An actual difference value between the second value and the first value is determined. A difference between a setpoint difference value and the actual difference value is supplied to a controller. An actuating signal for charging the piezoelectric actuator is determined as a function of the actuating variable.