The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 2004
Filed:
Aug. 23, 2001
Bernd Mueller, Leonberg, DE;
Thomas Brinz, Bissingen unter der Teck, DE;
Bernd Schumann, Rutesheim, DE;
Bernhard Bloemer, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method for operating a mixed-potential exhaust-gas probe for an internal combustion engine having a heatable probe ceramic with a first electrode , which is arranged in a chamber and is subjected to the reference atmosphere and with a second electrode which detects gas molecules and is arranged in the exhaust gas of the internal combustion engine, a pump voltage being applied between the first and second electrodes by means of a pump voltage source, so that, in the interior of the chamber , a somewhat reduced oxygen partial pressure is adjusted by the electrochemical pumping off of the oxygen molecules, characterized in that one applies a constant external voltage to the electrodes ( ) with this voltage deviating from the thermodynamic equilibrium voltage of the wanted reaction, measuring and evaluating the current dropping across the electrodes ( ).