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:
Aug. 27, 2013
Filed:
Feb. 18, 2009
Taro Aoyama, Susono, JP;
Yutaka Tanai, Susono, JP;
Taro Aoyama, Susono, JP;
Yutaka Tanai, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
In an internal combustion engine, an NOselective reduction catalyst () is arranged in an engine exhaust passage, an aqueous urea solution is fed to the NOselective reduction catalyst () and the ammonia generated from the aqueous urea solution is made to be adsorbed at the NOselective reduction catalyst (), and the adsorbed ammonia is used to selectively reduce NO. At the time the engine is stopped, when the ammonia adsorption amount at the NOselective reduction catalyst () is smaller than a predetermined target amount of adsorption, the urea necessary for making the ammonia adsorption amount at the NOselective reduction catalyst () the target amount of adsorption is fed to the NOselective reduction catalyst () at the time the engine is stopped.