Patent · US Expired

Compensation of batch variation in the travel due to variations in the layer thickness or number of layers in multi-layer piezoelectric elements

US6982516B2 · kind B2 · utility

1Cited by

12References

33Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Johannes-Jörg Rueger · Lambach, DE
Wolfgang Stoecklein · Stuttgart, DE
Bertram Sugg · Gerlingen, DE

Key dates

Filing date	Apr 2, 2001
Grant date	Jan 3, 2006
Priority date	—
Expiry date	Nov 28, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH02N2/067
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention describes a method and an apparatus for charging a piezoelectric element, for example, used as an actuator in a fuel injection system of an internal combustion engine. The method and apparatus are characterized in that the piezoelectric element is activated by an activation voltage having a value set as a function of manufacturing characteristics of the particular piezoelectric element and based upon, for example, a correction value for injected fuel volume.

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