Patent · US Active

Method for determining a functional state of a piezoelectric injector of an internal combustion engine

US8061188B2 · kind B2 · utility

3Cited by

1References

10Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Robert Hoffmann · Berlin, DE
Hartmut Wolpert · Zeitlarn, DE

Key dates

Filing date	Jul 23, 2007
Grant date	Nov 22, 2011
Priority date	—
Expiry date	May 14, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2041/2006
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A check is made to determine whether the capacitance value measured at a specific point in time corresponds to a capacitance value of a calculated further capacitance profile or the measured capacitance value is within two tolerance ranges.

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