Oxygen sensor

US6276191A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Jens Schneider · Anderson, US
• Harald Neumann · Lambach, DE
• Frank Stanglmeier · Heubach, DE
• Bernd Schumann · Rutesheim, DE
• Thomas Moser · Schwieberdingen, DE

Key dates

• Filing date: Jul 19, 1999
• Grant date: Aug 21, 2001
• Expiry date: Jul 19, 2019

Classification

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

Abstract

An oxygen sensor for determining the oxygen concentration in the exhaust gas flow of an internal combustion engine. The sensor includes an outer electrode exposed to the exhaust side and a reference electrode exposed to the ambient air. In the sensor, a space adjacent to the reference electrode or surrounding the reference electrode has an adsorbing and/or absorbing agent, which is introduced, for example, in a loose powder packing or a multiple pellet packing. Other versions of the novel oxygen sensor also have an oxygen supplying material, such as, for example, Mn-oxide, Ba-oxide and/or Ce-oxide, to help promote combustion of exhaust gas components/pollutants and any residue chemicals left remaining from the sensor manufacturing process.