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:
Apr. 30, 2013
Filed:
Feb. 23, 2009
Taisuke Ono, Osaka, JP;
Toshihisa Kanda, Osaka, JP;
Taisuke Ono, Osaka, JP;
Toshihisa Kanda, Osaka, JP;
Yanmar Co., Ltd., Osaka-shi, JP;
Abstract
An exhaust gas purification deviceis equipped with a plurality of branch exhaust passagesand; a junction exhaust passage; a shutoff valveswitching between allowing and shutting off the flow of exhaust gas to the respective branch exhaust passagesand; a nitrogen oxide adsorbing materialtemporarily adsorbing nitrogen oxides in an excess air atmosphere and detaching the adsorbed nitrogen oxides in a reducing atmosphere and reducing the nitrogen oxides in the reducing atmosphere to produce ammonia; a first combustion device, disposed on the exhaust upstream side of the nitrogen oxide adsorbing materialand having an air supply unit, changing the air supplied from the air supply unit into the reducing atmosphere; and a selective reduction catalyst, provided inside the junction exhaust passage, selectively reducing the nitrogen oxides by using ammonia as a reducing agent.