Sensor arrangement for determining gas components and/or gas concentrations of gas mixtures

US5505837A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Karl-Hermann Friese · Leonberg, DE
• Hermann Dietz · Gerlingen, DE
• Werner Gruenwald · Gerlingen, DE
• Gerhard Hoetzel · Stuttgart, DE
• Harald Neumann · Lambach, DE
• Johann Riegel · Bietigheim-Bissingen, DE
• Bernd Schumann · Rutesheim, DE

Key dates

• Filing date: Dec 12, 1994
• Grant date: Apr 9, 1996
• Expiry date: Dec 12, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/419
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor arrangement for determining at least one of gas components and gas concentrations of gas mixtures including CO, NO.sub.x and HC in exhaust gases of internal combustion engines, includes a measuring element which has a sensitive region; and a pump cell that includes a solid electrolyte and inner and outer pump electrodes which are opposingly disposed at least on the solid electrolyte and which effect an oxygen transfer to the measuring element, wherein the pump cell and the measuring element are spatially separated from one another, are located in different temperature zones during operation of the sensor arrangement, and are connected to one another by a diffusion segment through which oxygen can diffuse from the pump cell to the measuring element.