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. 23, 2020
Filed:
Dec. 20, 2018
Applicant:
Denso International America, Inc., Southfield, MI (US);
Inventors:
Edward Szczepanski, Grosse Pointe Woods, MI (US);
Michael Lewis, Dearborn, MI (US);
Assignee:
DENSO International America, Inc., Southfield, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 11/00 (2006.01); F02D 41/02 (2006.01);
U.S. Cl.
CPC ...
F01N 11/007 (2013.01); F02D 41/0235 (2013.01); F01N 2550/02 (2013.01);
Abstract
A vehicle controller is programmed to, in response to a command to perform a diagnostic test, operate an engine under one or more lean conditions and/or operate the engine under one or more rich conditions to determine if a catalytic converter, a pre-catalyst oxygen sensor, and a post-catalyst oxygen sensor within the exhaust system of the engine are functioning properly.