Patent · US Expired

Method and apparatus for determining charge quantity during charging and discharging of piezoelectric elements

US6539925B2 · kind B2 · utility

9Cited by

3References

23Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Johannes-Jörg Rueger · Lambach, DE
Matthias Beckert · Reutlingen, DE
Udo Schulz · Gießen, DE

Key dates

Filing date	Apr 2, 2001
Grant date	Apr 1, 2003
Priority date	—
Expiry date	Apr 2, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M63/0068
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention describes a method and apparatus for operating a fuel injection system having a piezoelectric element (10, 20, 30, 40, 50 or 60) for controlling the amount of fuel injected into a combustion engine, characterized in that the piezoelectric element (10, 20, 30, 40, 50 or 60) is controlled based upon the charge it is carrying.

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