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:
Mar. 01, 2005
Filed:
Oct. 09, 2002
Junichi Kako, Susono, JP;
Toshinari Nagai, Mishima, JP;
Naoto Katoh, Susono, JP;
Akihiro Katayama, Toyota, JP;
Kentaro Matsumoto, Numazu, JP;
Shinji Kojima, Aichi, JP;
Naoki Baba, Aichi, JP;
Junichi Kako, Susono, JP;
Toshinari Nagai, Mishima, JP;
Naoto Katoh, Susono, JP;
Akihiro Katayama, Toyota, JP;
Kentaro Matsumoto, Numazu, JP;
Shinji Kojima, Aichi, JP;
Naoki Baba, Aichi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An exhaust gas purification system comprises a NOx catalyst for absorbing the NOx in the exhaust gas when the air-fuel ratio of the influent exhaust gas is lean and purifying by reducing the absorbed NOx with a reducing agent in the exhaust gas when the air-fuel ratio of the exhaust gas turns rich, a first unit for calculating the amount of NOx absorbed per unit time in each area of the NOx catalyst when the air-fuel ratio of the exhaust gas flowing into the NOx catalyst is lean, and a second unit for calculating the total amount of NOx absorbed into the NOx catalyst by totaling the amounts of NOx calculated by the first calculation unit for the areas of the NOx catalyst.