Patent · US Expired

Fuel injection system

US6705291B2 · kind B2 · utility

12Cited by

3References

26Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Johannes-Jörg Rueger · Lambach, DE
Matthias Mrosik · Higashimatsuyama, JP
Volker Pitzal · Schwäbisch Gmünd, DE
Bertram Sugg · Gerlingen, DE
Friedrich Boecking · Stuttgart, DE
Udo Schulz · Gießen, DE

Key dates

Filing date	Apr 2, 2001
Grant date	Mar 16, 2004
Priority date	—
Expiry date	Apr 2, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH10N30/802
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Fuel injection system comprising a piezoelectric element for controlling the amount of injected fuel and further comprising a control unit for determination of a possible fault of the piezoelectric element or of an electric circuitry driving the piezoelectric element based upon a value related to the capacitance of the piezoelectric element.

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