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:
Aug. 21, 2012
Filed:
Oct. 22, 2008
Applicants:
Shigeki Miyashita, Susono, JP;
Kei Masuda, Mishima, JP;
Inventors:
Shigeki Miyashita, Susono, JP;
Kei Masuda, Mishima, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An amount of fuel injected into an internal combustion engine is controlled to adjust an air-fuel ratio. An air-fuel ratio sensor is disposed upstream of a three-way catalyst. An ammonia sensor is disposed downstream of the three-way catalyst. Main feedback control based on the air-fuel ratio sensor is performed such that the air-fuel ratio of exhaust gas becomes close to a target air-fuel ratio in the neighborhood of a stoichiometric air-fuel ratio. Sub-feedback control is performed on the basis of an output value of the ammonia sensor.