Patent · US Active

Method and device for metering a fluid

US8087400B2 · kind B2 · utility

4Cited by

12References

18Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Erwin Achleitner · Obertraubling, DE
Dirk Baranowski · Regensburg, DE
Franz Kunz · Fairview Avenue, DE

Key dates

Filing date	Sep 22, 2008
Grant date	Jan 3, 2012
Priority date	—
Expiry date	Nov 3, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH01F2007/1894
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An injection valve has a magnetic actuator and an injector needle able to be moved axially by the magnetic actuator. To meter a fluid by the injection valve the magnetic actuator is activated for an individual metering process with at least one actuation signal with a first or second signal waveform. The two actuation signals differ from one another in that, on activation of the magnetic actuator by the actuation signal with the first signal waveform, less energy is transmitted to a magnet unit of the magnetic actuator than during activation of the magnetic actuator by the actuation signal with the second signal waveform. The magnetic actuator is activated by the actuation signal with the second signal waveform if an activation of the magnetic actuator by the actuation signal with the first signal waveform leads to an undesired premature closure of the injector needle.

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