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:
Jul. 16, 2019
Filed:
Sep. 07, 2017
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventors:
Gregory J. York, Fenton, MI (US);
Vijay A. Ramappan, Novi, MI (US);
Zhijian J. Wu, Rochester Hills, MI (US);
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/20 (2006.01); F01N 9/00 (2006.01); F01N 11/00 (2006.01);
U.S. Cl.
CPC ...
F01N 9/005 (2013.01); F01N 3/2006 (2013.01); F01N 11/00 (2013.01); F01N 2900/08 (2013.01); F01N 2900/1626 (2013.01);
Abstract
A method for cold start emissions diagnostic of a catalytic treatment device of an internal combustion engine includes determining a torque reserve; determining a catalyst light off (CLO) state; integrating the total torque reserve over a time period established by the CLO state; determining if a value from the integration exceeds an integration threshold; and if the value from the integration exceeds the integration threshold, indicating that the cold start emissions diagnostic is positive.