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. 31, 2010
Filed:
Sep. 02, 2004
Thorsten Ochs, Schwieberdingen, DE;
Helge Schichlein, Karlsruhe, DE;
Sabine Thiemann-handler, Stuttgart, DE;
Bernd Schumann, Rutesheim, DE;
Thorsten Ochs, Schwieberdingen, DE;
Helge Schichlein, Karlsruhe, DE;
Sabine Thiemann-Handler, Stuttgart, DE;
Bernd Schumann, Rutesheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A sensor element of a gas sensor, which is used for determining the concentration of ammonia and, optionally, at least one further component of a gas mixture, in particular in exhaust gases of combustion engines. The sensor element includes at least one first auxiliary electrode and at least one measuring electrode positioned downstream in the flow direction of the gas mixture, which are in direct contact with the gas mixture, a signal generated by the measuring electrode being used at least intermittently for determining the concentration of ammonia. A potential, at which ammonia contained in the gas mixture is oxidized, is applied at least intermittently to the first auxiliary electrode or the measuring electrode.