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:
Jul. 05, 2005
Filed:
Feb. 11, 2003
Yoshinori Maegawa, Obu, JP;
Syujiro Morinaga, Takahama, JP;
Hisashi Iida, Kariya, JP;
Tatsuya Oka, Chiryu, JP;
Masakazu Yamada, Kariya, JP;
Yoshinori Maegawa, Obu, JP;
Syujiro Morinaga, Takahama, JP;
Hisashi Iida, Kariya, JP;
Tatsuya Oka, Chiryu, JP;
Masakazu Yamada, Kariya, JP;
DENSO Corporation, Kariya, JP;
Abstract
An engine control system has a self-diagnosis function of an exhaust system. The self-diagnosis function includes a first mode for detecting a failure or abnormality of the exhaust system as a whole, and a second mode for determining and locating a specific failed component in the exhaust system. The first mode is executed during the engine is operated under a normal condition. Therefore it is possible to detect the failure of the exhaust system without lowering a drive performance or increasing emissions. In case of detecting any failure in the first mode, the second mode is activated in response to a command signal that can be entered via a service tool. In the second mode, the engine is operated in order to determine the failed component. In the second mode, determining the failed component takes priority over keeping the drive performance or reducing emissions.