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:
Jan. 29, 2013
Filed:
Feb. 27, 2009
Lan Wang, Troy, MI (US);
Robert J. Genslak, Macomb, MI (US);
Wenbo Wang, Novi, MI (US);
Matthew Squire, Fenton, MI (US);
Jinchun Peng, Canton, MI (US);
Edward Stuteville, Linden, MI (US);
Kurt D. Mclain, Clarkston, MI (US);
Lan Wang, Troy, MI (US);
Robert J. Genslak, Macomb, MI (US);
Wenbo Wang, Novi, MI (US);
Matthew Squire, Fenton, MI (US);
Jinchun Peng, Canton, MI (US);
Edward Stuteville, Linden, MI (US);
Kurt D. McLain, Clarkston, MI (US);
Abstract
A control system for an engine having a catalytic converter includes an energy calculation module that calculates a calculated mass air flow (MAF) of intake air of the engine based on a requested torque and a requested spark timing that correspond to a desired thermal energy of exhaust of the engine, and that determines an expected thermal energy of the exhaust based on the calculated MAF, and an energy residual module that determines a thermal energy residual of the exhaust based on the expected thermal energy and an estimated thermal energy of the exhaust, wherein the estimated thermal energy is based on a measured MAF of the intake air. The control system includes an energy evaluation module that determines a diagnostic result that indicates whether the catalytic converter is operating within a target temperature range based on the thermal energy residual. Related control methods are also provided.