Patent · US Active

Determining the opening behavior of a fuel injector by means of an electrical test excitation without magnetic saturation

US10487788B2 · kind B2 · utility

0Cited by

3References

11Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Christian Hauser · Lappersdorf, DE
Michael Koch · Biberist, CH
Robert Fromm · Donaustauf, DE
Gerd Rösel · Dresden, DE

Key dates

Filing date	Nov 28, 2012
Grant date	Nov 26, 2019
Priority date	—
Expiry date	Feb 12, 2033

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2200/0602
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for determining an opening behavior of a combustion engine fuel injector having a coil drive includes: applying to a coil of the coil drive an electrical test excitation that is weaker than an electrical standard excitation applied to the coil during normal operation of the engine, such that an opening position of the fuel injector is achieved at a point at which the coil drive is not in magnetic saturation; measuring the chronological progression of an electrical variable of the coil; determining a first point in time at which the fuel injector reaches its opening position under the influence of the electrical test excitation, based on the measured chronological progression of the electrical variable, and determining a second point in time at which the fuel injector would reach its opening position under the influence of the electrical standard excitation, based on the determined first point in time.

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