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:
Jul. 09, 2013
Filed:
Nov. 23, 2007
Applicants:
Hans-peter Lehr, Stuttgart, DE;
Erik Tonner, Gerlingen, DE;
Inventors:
Hans-Peter Lehr, Stuttgart, DE;
Erik Tonner, Gerlingen, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T 7/12 (2006.01); G05D 1/00 (2006.01); G06F 7/00 (2006.01); G06F 17/00 (2006.01); F02M 51/00 (2006.01); H01L 41/00 (2006.01); H02N 2/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method is for operating a fuel injector, in particular of an internal combustion engine of a motor vehicle, the fuel injector including a piezoelectric actuator for driving a valve needle, which is connected, preferably hydraulically, to the actuator, and the control voltage of the piezoelectric actuator being analyzed to infer an operating state of the fuel injector. According to this method, the second time derivative of the control voltage and/or a variable depending on the second time derivative of the control voltage is/are analyzed.