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:
Sep. 16, 2003
Filed:
Mar. 15, 2002
Hiroki Matsuoka, Toyota, JP;
Souichi Matsushita, Toyota, JP;
Yukihiro Tsukasaki, Toyota, JP;
Kotaro Hayashi, Toyota, JP;
Shinobu Ishiyama, Toyota, JP;
Yasuhiro Ohtsubo, Toyota, JP;
Naofumi Magarida, Toyota, JP;
Masaaki Kobayashi, Toyota, JP;
Daisuke Shibata, Toyota, JP;
Akihiro Negami, Toyota, JP;
Tomihisa Oda, Toyota, JP;
Yasuo Harada, Toyota, JP;
Tomoyuki Ono, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A NOx catalyst in the exhaust passage of an internal combustion engine is capable of lean burn and adapted to release and reduce absorbed NOx by a reducing agent. Reducing agent supplier is provided in the exhaust passage on the upstream side of the NOx catalyst. A load detector detects the load of an internal combustion engine. Reducing agent addition controller controls the reducing agent addition period and the reducing agent addition interval based on the load of the internal combustion engine, whereby sufficient reducing agent is supplied to the NOx catalyst side independently of the operating condition.