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:
Feb. 17, 2015
Filed:
Feb. 18, 2011
Junichi Matsuo, Susono, JP;
Hiromasa Nishioka, Susono, JP;
Katsuhiko Oshikawa, Tokyo, JP;
Yoshihisa Tsukamoto, Susono, JP;
Hiroshi Otsuki, Susono, JP;
Shigeki Nakayama, Gotenba, JP;
Junichi Matsuo, Susono, JP;
Hiromasa Nishioka, Susono, JP;
Katsuhiko Oshikawa, Tokyo, JP;
Yoshihisa Tsukamoto, Susono, JP;
Hiroshi Otsuki, Susono, JP;
Shigeki Nakayama, Gotenba, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An exhaust purification system of an internal combustion engine, which includes: a silver-alumina-based catalyst, which is arranged in an engine exhaust system and, when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, releases adsorbed NOat a first set temperature and adsorbed NO at a second set temperature, a secondary air feed passage configured to suppress a temperature rise of the silver-alumina-based catalyst; and an electronic control unit, that: controls the air flow through the secondary air feed passage to: when the silver-alumina-based catalyst has reached a third set temperature, suppress a temperature rise of the silver-alumina-based catalyst to maintain the silver-alumina-based catalyst near the third set temperature, and then lift the suppression of the temperature rise of the silver-alumina-based catalyst so that at least part of the NO adsorbed at the silver-alumina-based catalyst, is oxidized to NOto be adsorbed at the silver-alumina-based catalyst.