Method for operating a particle sensor

US10088405B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Enno Baars · Leonberg, DE
• Andy Tiefenbach · Sachsenheim, DE
• Michael Bessen · Stuttgart, DE

Key dates

• Filing date: May 29, 2015
• Grant date: Oct 2, 2018
• Expiry date: Aug 4, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for determining soot in exhaust gases of burners or internal combustion engines with the aid of a sensor element which includes at least two measuring electrodes exposed to the exhaust gas and one heating element, a voltage being applied to the at least two measuring electrodes during a measuring phase and the current flow or electrical resistance occurring between the measuring electrodes being determined and output as a measure for the particle concentration or the particle mass flow, characterized in that during the measuring phase, the temperature of the sensor element is monitored and the sensor element is heated by the heating element, if the temperature of the sensor element falls below a limiting temperature.