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:
Sep. 12, 2006
Filed:
Sep. 22, 2004
Akihiro Katayama, Toyota, JP;
Tokiji Ito, Toyota, JP;
Akihiro Katayama, Toyota, JP;
Tokiji Ito, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A controller executes temperature rise control on a catalyst device by retarding ignition timing that is set based on engine operating conditions. The controller reaches a diagnosis that the temperature rise control is normal if an advance angle side accumulated time for which the ignition timing is set exceeding a threshold value to an advance angle side during execution of the temperature rise control is less than an accumulated time determination value. When the advance angle side accumulated time is greater than or equal to the accumulated time determination value, the controller reaches a diagnosis that the temperature rise control has an anomaly.