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:
Oct. 20, 1992
Filed:
Jan. 21, 1992
Hideaki Muraki, Nagoya, JP;
Kiyohiko Oishi, Toyota, JP;
Kenji Katoh, Shizuoka, JP;
Shinichi Takeshima, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A noble metal base catalyst for decomposing a portion of NOx included in engine exhaust gas into intermediate products such as N.sub.2 O and NO.sub.2 is installed in an exhaust conduit of a lean burn engine. Further, an intermediate product decomposing means for decomposing the intermediate products produced by the noble metal base catalyst into N.sub.2 and O.sub.2 is installed downstream of the noble metal base catalyst. The noble metal base catalyst has a high thermal durability, and the noble metal base catalyst and the intermediate product decomposing means decompose NOx into N.sub.2 and O.sub.2 without a large amount of HC.