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:
Dec. 08, 2009
Filed:
Feb. 12, 2007
Wenbo Wang, Novi, MI (US);
John L. Lahti, Novi, MI (US);
Christopher a Gillanders, Royal Oak, MI (US);
Robert J. Genslak, Macomb, MI (US);
John F. Van Gilder, Webberville, MI (US);
Wenbo Wang, Novi, MI (US);
John L. Lahti, Novi, MI (US);
Christopher A Gillanders, Royal Oak, MI (US);
Robert J. Genslak, Macomb, MI (US);
John F. Van Gilder, Webberville, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A diagnostic cold start emissions control system for an internal combustion engine includes a control module having a calculated engine-out energy module, an engine-out energy residual module, and a diagnostic system evaluation module. The calculated engine-out energy module is in communication with the engine-out energy residual module and is configured to determine an operating engine-out energy flow based on an operating engine torque. The engine-out energy residual module is in communication with the diagnostic system evaluation module and is configured to determine an engine-out energy residual based on the determined engine-out energy flow and an expected engine-out energy flow. The diagnostic system evaluation module is configured to determine whether the determined engine-out energy residual meets a predetermined value indicative of proper cold start emissions control.