Method for operating a sensor for recording particles in a gas stream and device for implementing the method

US7587925B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ralf Wirth · Leonberg, DE
• Heribert Haerle · Stuttgart, DE
• Torsten Handler · Stuttgart, DE
• Dirk Samuelsen · Ludwigsburg, DE
• Werner Christl · Asperg, DE
• Sabine Rösch · Ditzingen, DE
• Bernhard Kamp · Ludwigsburg, DE
• Michael Kolitsch · Rutesheim, DE
• Katharina Schaenzlin · Rottenburg am Neckar, DE

Key dates

• Filing date: Aug 25, 2006
• Grant date: Sep 15, 2009
• Expiry date: Aug 12, 2027

Classification

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

Abstract

A method for operating a sensor for recording particles in an exhaust gas flow and a device for carrying out the method are provided, in which at least one measure of the exhaust gas flow is ascertained and in which the measure of the exhaust gas flow is taken into consideration in the valuation of the particle sensor signal made available by the particle sensor. The procedure is based on the knowledge that the exhaust gas flow, for instance, the exhaust gas volume flow, has an influence on the particle sensor signal made available by the particle sensor, especially when the measuring effect is based on the depositing of particles on a sensor surface. Using the procedure, a possibly present cross sensitivity of the particle sensor with respect to different exhaust gas flows is taken into consideration, so that the measuring accuracy is increased.