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:
Nov. 20, 2012
Filed:
Feb. 25, 2008
Kenichi Tsujimoto, Susono, JP;
Shinya Hirota, Susono, JP;
Kenichi Tsujimoto, Susono, JP;
Shinya Hirota, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An internal combustion engine wherein an HC treatment catalyst () having the function of adsorbing the HC in the exhaust gas is arranged upstream of the NOx selective reducing catalyst (), an urea aqueous solution fed from the reducing agent feed valve () is arranged upstream of the HC treatment catalyst (), urea, and NOx contained in the exhaust gas, and HC adsorbed on the HC treatment catalystare reacted with each other to form intermediate products having cyano groups, oximes, and amino groups, and these intermediate products are sent to the NOx selective reducing catalyst ().