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. 26, 2014
Filed:
Jun. 03, 2009
Shinya Hirota, Susono, JP;
Shinya Hirota, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An exhaust purification system of an internal combustion engine is provided with a first NOselective reduction catalyst which is arranged inside of an engine exhaust passage and which selectively reduces NOby feed of a reducing agent, a second NOselective reduction catalyst which is arranged inside of the engine exhaust passage at the downstream side of the first NOselective reduction catalyst and which selectively reduces NOby feed of a reducing agent, and a reducing agent feed device which feeds a reducing agent to the first NOselective reduction catalyst. The system estimates the amount of adsorption of the reducing agent which is adsorbed at the second NOselective reduction catalyst and prevents the estimated amount of adsorption of the reducing agent from exceeding the allowable value by adjusting the amount of feed of reducing agent from the reducing agent feed device.