Patent · US Expired

Method for evaluating characteristic values of piezo-mechanical systems

US6487505B1 · kind B1 · utility

13Cited by

11References

15Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Randolf Mock · Munich, DE
Eric Chemisky · Haar, DE
Andreas Kappel · Höhenkirchen-Siegertsbrunn, DE

Key dates

Filing date	Jun 16, 2000
Grant date	Nov 26, 2002
Priority date	—
Expiry date	Jun 16, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH02N2/06
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.