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:
Jun. 30, 2020
Filed:
Nov. 12, 2014
Applicant:
Robert Bosch Gmbh, Stuttgart, DE;
Inventor:
Bernhard Ledermann, Stuttgart, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 27/417 (2006.01); F02D 41/14 (2006.01);
U.S. Cl.
CPC ...
G01N 27/4175 (2013.01); F02D 41/1474 (2013.01); F02D 41/1495 (2013.01); F02D 41/1454 (2013.01);
Abstract
A method for diagnosing a lambda sensor during ongoing operation. It includes energizing the lambda sensor using a pump current pulse additive to a pump current and a pump current counter pulse additive to the pump current and ascertaining a malfunction of the lambda sensor from voltages, which are measured at a pump cell and/or a Nernst cell of the lambda sensor during the energization by the pulses.