Patent · US Expired

Device and method for measuring the injection quantity of injection nozzles, especially for motor vehicles

US6886400B2 · kind B2 · utility

0Cited by

4References

20Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Eberhard Schoeffel · Bamberg, DE
Hans-Peter Braun · Sulz am Neckar, DE
Fabian Lafrenz · Bietigheim-Bissingen, DE
Josef Seidel

Key dates

Filing date	Dec 6, 2001
Grant date	May 3, 2005
Priority date	—
Expiry date	Jan 23, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG01F23/268
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A device is used for measuring the injection quantity of injection nozzles. It includes a measuring chamber to which the injection nozzle can be coupled. In addition, a detection device is provided, which detects a state change of the testing fluid in the measuring chamber due to an injection by the injection nozzle. In order to be able to measure the injection quantity without wear and in a highly precise manner, the invention provides that the detection device has a capacitor, whose one electrode is comprised of an electrically conductive fluid, which is at least partially contained in a volume connected to the measuring chamber. The processing unit is connected to the capacitor in such a way that it can detect a change in its capacitance, which is produced by a movement of the electrically conductive fluid.

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