Patent · US Active

Method for assessing the operatability of a sensor for detecting soot

US11933751B2 · kind B2 · utility

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0References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Karola Herweg · Stuttgart, DE
Carolin Maria Schilling · Bad Mingolsheim, DE
Mathias Klenk · Petershöfe, DE

Key dates

Filing date	Sep 16, 2019
Grant date	Mar 19, 2024
Priority date	—
Expiry date	Mar 5, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01N33/0006
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for evaluating the functionality of a ceramic sensor for detecting soot, the sensor including two measurement electrodes exposable to an exhaust and spaced apart from one another, and an electrical resistance heating element. The method includes: activating the resistance heating element to heat up the sensor and to burn soot off the two measurement electrodes; then deactivating the resistance heating element; then waiting for a first predetermined time period and/or waiting until a signal that is received from the sensor and represents the sensor temperature reaches a first predefined value; then measuring a first variable representing the electrical resistance between the measurement electrodes; then evaluating the functionality of the sensor based on the first variable representing the electrical resistance between the measurement electrodes.

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