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:
Nov. 26, 2002
Filed:
Jun. 16, 2000
Applicant:
Inventors:
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K 7/00 ; H01R 4/60 ; G06F 1/900 ;
U.S. Cl.
CPC ...
H05K 7/00 ; H01R 4/60 ; G06F 1/900 ;
Abstract
For diagnosing coupled piezo-mechanical systems, methods are used which utilize electrical characteristic curves of the piezo-element that is contained in the piezo-mechanical systems. These electrical characteristic curves contain information about the mechanical condition of the overall piezo-mechanical system, which can be interpreted by suitable evaluating methods. It is thus possible to perform a diagnosis in which malfunctions and failures of the piezo-mechanical system can be detected (e.g. wear or failure of particular components). An important field of application is the diagnosis of fuel injectors which are controlled via piezo-actuators.