Gas sensor

US7258770B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Helmut Weyl
• Claudio De La Prieta · Stuttgart, DE
• Andreas Hachtel · Echterdingen, DE
• Thomas Schulte · Paderborn, DE
• Thomas Egner · Kornwestheim, DE
• Juergen Wilde · Fellbach, DE
• Markus Siebert · Leonberg, DE
• Michael Kupzig · Niederkassel, DE
• Uwe Glanz · Asperg, DE
• Rainer Mueller · Stuttgart, DE
• Leonore Schwegler · Stuttgart, DE
• Petra Kuschel · Leonberg, DE
• Andreas Pesch · Krefeld, DE

Key dates

• Filing date: May 23, 2003
• Grant date: Aug 21, 2007
• Expiry date: Apr 23, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4078
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A gas sensor is for determining at least one physical quantity of a gas, e.g., an exhaust gas of an internal combustion engine, the gas sensor having a sensor element that is fixed in a housing of the gas sensor by a seal assembly. The seal assembly includes a sealing element, which has a ceramic and/or a metallic material. After the heat treatment, the sealing element has a maximum decrease in volume of 5 percent, or an increase in volume, based on the volume of the sealing element prior to the heat treatment.