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:
Apr. 21, 2020
Filed:
Jan. 16, 2018
Applicant:
Robert Bosch Gmbh, Stuttgart, DE;
Inventors:
Eckehard Knoefler, Marbach, DE;
Torsten Handler, Stuttgart, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 27/416 (2006.01); G01N 33/00 (2006.01); F01N 11/00 (2006.01);
U.S. Cl.
CPC ...
G01N 33/007 (2013.01); F01N 11/00 (2013.01); F01N 11/007 (2013.01); G01N 33/0037 (2013.01); F01N 2560/026 (2013.01); F01N 2560/12 (2013.01); Y02A 50/245 (2018.01); Y02T 10/47 (2013.01);
Abstract
A method is presented for checking the functional capability of a nitrogen oxide sensor () which has a first chamber () and a second chamber (), wherein the first chamber has a first oxygen pump cell () and the second chamber has a second pump cell (), in a normal operating mode of the nitrogen oxide sensor (), an oxygen concentration level in the first chamber is reduced to a predetermined first value with the first pump cell, and an oxygen concentration level in the second chamber is reduced to a second value with the second pump cell, said second value being lower than the first value.