Gas sensor, especially a lambda probe

US6746585B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Heiner Scheer · Gnarrenburg, DE
• Hans-Joerg Renz · Echterdingen, DE
• Johann Riegel · Bietigheim-Bissingen, DE
• Lothar Diehl · Stuttgart, DE
• Sabine Thiemann-Handler · Stuttgart, DE

Key dates

• Filing date: Jul 25, 2002
• Grant date: Jun 8, 2004
• Expiry date: Jul 25, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4071
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A gas sensor has improved electrical properties. In the top view of the layer planes of the body of the sensor, printed circuit traces for electrodes are arranged outside of cavities in the body, e.g., outside of the reference air duct. Furthermore, the electrodes are enlarged in the direction of the exhaust-side end of the sensor. Also, the printed circuit traces have an increased layer thickness or are formed as a double layer.