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. 11, 2012
Filed:
May. 19, 2005
Koichiro Fukuda, Sunto-gun, JP;
Kingo Suyama, Susono, JP;
Koichiro Fukuda, Sunto-gun, JP;
Kingo Suyama, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
In an exhaust gas control apparatus for an internal combustion engine () of the invention, including an exhaust gas control catalyst () which purifies exhaust gas released from the internal combustion engine (), and a fuel supply valve () which supplies fuel to a portion upstream of the exhaust gas control catalyst (), the fuel supply valve () is operated such that a cycle formed by combining a fuel supply period in which fuel is supplied from the fuel supply valve () and a fuel supply stopped period in which fuel is not supplied is repeatedly performed in order to control the temperature of the exhaust gas control catalyst () to the target temperature. The arrangement of the fuel supply period and the fuel supply stopped period is controlled such that the temperature of the exhaust gas control catalyst () at each of a starting point (P) and an ending poring (P) of each cycle is equal to the target temperature.