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. 06, 2017
Filed:
Oct. 29, 2014
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventors:
Kevin J. McKay, New Hudson, MI (US);
Chad E. Marlett, Plymouth, MI (US);
Steve L. Melby, Howell, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02B 29/04 (2006.01); F02D 41/00 (2006.01); F02M 26/25 (2016.01); F02M 26/33 (2016.01);
U.S. Cl.
CPC ...
F02B 29/0493 (2013.01); F02D 41/0065 (2013.01); F02M 26/25 (2016.02); F02M 26/33 (2016.02); F02D 2041/0067 (2013.01); Y02T 10/146 (2013.01); Y02T 10/47 (2013.01);
Abstract
A method for monitoring an internal combustion engine includes monitoring thermal efficiency in a heat exchanger of an exhaust gas recirculation (EGR) system with a flow control valve commanded to a first, open state and monitoring thermal efficiency in the heat exchanger with the flow control valve commanded to a second, closed state. The flow control valve is evaluated based upon the monitored efficiencies.