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. 05, 2006
Filed:
Feb. 25, 2003
Daisuke Kojima, Nagoya, JP;
Masumi Kinugawa, Okazaki, JP;
Kiyonori Sekiguti, Okazaki, JP;
Yasuhiro Kariya, Obu, JP;
Tatsumasa Sugiyama, Anjyo, JP;
Daisuke Kojima, Nagoya, JP;
Masumi Kinugawa, Okazaki, JP;
Kiyonori Sekiguti, Okazaki, JP;
Yasuhiro Kariya, Obu, JP;
Tatsumasa Sugiyama, Anjyo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
If the amount of fuel added to exhaust gas becomes excessive as a result of an abnormality of an addition agent supply unit (), the air-fuel ratio of exhaust as decreases. If an exhaust gas air-fuel ratio obtained from a value output from an A/F sensor () remains equal to or smaller than a predetermined value for a predetermined period, an ECU () determines that an addition agent supply unit () is abnormal. Upon detection of an abnormality of the addition agent supply unit (), the ECU () incrteases an amount of EGR gas recirculated to the intake side by an EGR unit (), reduces an amount of fuel injection from injectors (), and restricts an operational state of an engine body () to a low-speed/low-load state. Also, the ECU () turns a warning lamp () on, warns a driver of the abnormality of the addition agent supply unit (), and makes it possible to pull a vehicle over safely.