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:
May. 28, 2013
Filed:
Mar. 10, 2010
Shinya Hirota, Susono, JP;
Yoshinori Yamashita, Kakegawa, JP;
Shinya Hirota, Susono, JP;
Yoshinori Yamashita, Kakegawa, JP;
Toyota Jidosha Kabushiki Kaisha, Tokyo, JP;
Cataler Corporation, Kakegawa-shi, JP;
Abstract
In an exhaust gas purification system for an internal combustion engine, a NOselective reduction catalyst for reducing NOwith ammonia that is adsorbed on the NOselective reduction catalyst is disposed in an exhaust passage of the engine. In the NOselective reduction catalyst, ammonia in a first adsorption state that is adsorbed at a low temperature and ammonia in a second adsorption state that is adsorbed at a high temperature are present. Because ammonia, which has been in the first adsorption state and which is desorbed from the NOselective reduction catalyst, tends to be discharged to the atmosphere, a control section that estimates an adsorption amount of ammonia in the first adsorption state is provided in the exhaust gas purification system for the internal combustion engine in order to control the adsorption amount of ammonia in the first adsorption state within a specified level.