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:
Jan. 24, 2006
Filed:
Jul. 17, 2003
Koichi Kimura, Nagoya, JP;
Shinya Hirota, Susono, JP;
Yoshimitsu Henda, Numazu, JP;
Kazuhiro Itoh, Mishima, JP;
Takamitsu Asanuma, Susono, JP;
Shunsuke Toshioka, Numazu, JP;
Yasuaki Nakano, Sunto-gun, JP;
Koichiro Nakatani, Mishima, JP;
Akira Mikami, Susono, JP;
Koichi Kimura, Nagoya, JP;
Shinya Hirota, Susono, JP;
Yoshimitsu Henda, Numazu, JP;
Kazuhiro Itoh, Mishima, JP;
Takamitsu Asanuma, Susono, JP;
Shunsuke Toshioka, Numazu, JP;
Yasuaki Nakano, Sunto-gun, JP;
Koichiro Nakatani, Mishima, JP;
Akira Mikami, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An exhaust emission purification device comprises a sulfur component holding agent arranged on the exhaust path of an internal combustion engine for holding a sulfur component, a NOholding agent arranged downstream of the sulfur component holding agent in the exhaust gas for holding NOand the sulfur components when the air-fuel ratio of the exhaust gas flowing thereinto is lean, and a reducing agent adding unit for adding a reducing agent to the exhaust gas flowing into the NOholding agent. The concentration of the sulfur component contained in the reducing agent added by the reducing agent adding unit is lower than the concentration of at least the sulfur component contained in the fuel supplied to the combustion chamber of the internal combustion engine. Thus, the sulfur poisoning of the exhaust emission purifier can be avoided while at the same time reducing the fuel consumption rate.