Patent · US Active

Methods for operating an electrostatic particle sensor

US11119006B2 · kind B2 · utility

0Cited by

1References

10Claims

0Family size

Assignee

VITESCO TECHNOLOGIES GMBH · DE

Inventors

Christoph Hamann · Tauberbischofsheim, DE
Kay Schwarzkopf · Regensburg, DE
Christoph Strobl · Munich, DE

Key dates

Filing date	Feb 21, 2018
Grant date	Sep 14, 2021
Priority date	—
Expiry date	Jul 16, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG01N2015/0046
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Various embodiments include a method for operating an electrostatic particle sensor to detect the particle concentration in the exhaust gas of an internal combustion engine, the sensor comprising a first electrode, a second electrode electrically insulated from the first electrode by an insulating body, a guard electrode electrically insulated from the first electrode and from the second electrode by the insulating body, and a voltage supply. The method comprises: applying a first electric potential to the first electrode; applying a second electric potential to the second electrode; applying an guard potential to the guard electrode; and limiting a first leakage current flowing between the first electrode and the guard electrode via the insulating body to a first leakage-current limiting value using a first electrical limiting resistor arranged between the guard electrode and the voltage supply.

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