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:
Feb. 17, 2009
Filed:
Apr. 19, 2007
John L. Lahti, Novi, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
John L. Lahti, Novi, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
There is provided a method and an article of manufacture comprising a storage medium having machine-executable code stored therein for estimating a power loss for an internal combustion engine at a point in time. The code includes code to determine engine operating conditions. A nominal power loss is determined based upon an engine operating point. A power loss correction to the nominal power loss is determined based upon barometric pressure, engine temperature, air/fuel ratio, and catalyst temperature. The power loss correction is determinable for: an engine air/fuel ratio mode, an engine cylinder activation mode, and, an engine operating temperature mode.