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:
May. 07, 2013
Filed:
Jun. 15, 2009
Takamitsu Asanuma, Mishima, JP;
Kohei Yoshida, Gotenba, JP;
Hiromasa Nishioka, Susono, JP;
Daichi Imai, Susono, JP;
Kazuhiro Umemoto, Susono, JP;
Takamitsu Asanuma, Mishima, JP;
Kohei Yoshida, Gotenba, JP;
Hiromasa Nishioka, Susono, JP;
Daichi Imai, Susono, JP;
Kazuhiro Umemoto, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An electronic control unit executing an algorithm so as to operate an exhaust purification system of an engine. The algorithm (1) commences a regeneration treatment by causing an amount of fuel supplied to a combustion process of the engine to increase so as to change an air-fuel ratio of exhaust gas of the engine from a first lean air-fuel ratio to a set rich air-fuel ratio and (2) causes uncombusted fuel to be supplied to a NOx catalyst device during at least one of: a first period in which an air-fuel ratio of the exhaust gas within the NOx catalyst device changes from the first lean air-fuel ratio to the set rich air-fuel ratio when the regeneration treatment is started; and a second period after an air-fuel ratio of the exhaust gas within the NOx catalyst device becomes a ratio indicating completion of the regeneration treatment.