Patent · US Active

Method for determining an aggregate state of aqueous operating liquid in an operating liquid container for a motor vehicle, and operating liquid container for carrying out the method

US11774386B2 · kind B2 · utility

0Cited by

4References

14Claims

0Family size

Assignee

Kautex Textron GmbH & Co. KG · DE

Inventors

Karl Krieger · Brinkum, DE
Jakob Happel · Brinkum, DE
Hartmut Wolf · Bellinghauserhohn, DE

Key dates

Filing date	Dec 13, 2018
Grant date	Oct 3, 2023
Priority date	—
Expiry date	Oct 8, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/22
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for determining an aggregate state of an operating liquid in an operating liquid container for a motor vehicle, which operating liquid container has at least one capacitor fastened to a container wall of the operating liquid container and has a first electrode and a second electrode opposite said first electrode. A first method determines the aggregate state of the operating liquid by means of a frequency-dependent phase profile of the impedance of the at least one capacitor. Another method determines the aggregate state of the operating liquid by means of a frequency-dependent capacitance profile of the at least one capacitor. Further, an operating liquid container is designed for carrying out the methods.

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