Gas sensor

US7445699B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Heiner Scheer · Gnarrenburg, DE
• Carsten Springhorn · Stuttgart, DE
• Hans-Joerg Renz · Echterdingen, DE
• Frank Haag · Hussenhofen, DE
• Walter Strassner · Schorndorf, DE
• Lothar Diehl · Stuttgart, DE
• Thomas Moser · Schwieberdingen, DE
• Stefan Rodewald · Ditzingen, DE
• Marten Mamey · Bobingen, DE
• Jurgen Karle · Rutesheim, DE

Key dates

• Filing date: Oct 4, 2002
• Grant date: Nov 4, 2008
• Expiry date: Feb 6, 2025

Classification

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

Abstract

A gas sensor for detecting at least one physical magnitude of a gas, in particular of exhaust gases of an internal combustion engine, is proposed, which includes a sensor element having an electrochemical cell. The electrochemical cell includes a first solid electrolyte member on which a first electrode and a second electrode are applied. The first and the second electrode are electrically connected by means of the first solid electrolyte member. The first electrode is in contact with the gas. The area of the first electrode is smaller than the area of the second electrode.