Exhaust gas probe

US6676818B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Jens Schneider · Anderson, US
• Detlef Heimann · Gerlingen, DE
• Hans-Joerg Renz · Echterdingen, DE
• Harald Neumann · Lambach, DE
• Bernd Schumann · Rutesheim, DE
• Lothar Diehl · Stuttgart, DE

Key dates

• Filing date: Mar 30, 2001
• Grant date: Jan 13, 2004
• Expiry date: Mar 30, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/407
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For the reduction of internal stresses and formation of cracks caused thereby, an exhaust gas probe includes two measuring electrodes separated by a solid electrolyte layer made substantially of ZrO2 and a circuit-board conductor layer for electrically heating the solid electrolyte layer. The circuit-board conductor layer is firmly connected to the solid electrolyte layer via a first sealingly sintered insulating layer made of an Al2O3-containing material. A pore-forming material is added to the Al2O3-containing material before. sintering.