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:
Feb. 25, 2014
Filed:
Feb. 20, 2009
Taisuke Ono, Osaka, JP;
Taisuke Ono, Osaka, JP;
Yanmar Co., Ltd., Osaka-shi, JP;
Abstract
A method for controlling an exhaust gas purification deviceequipped with branch exhaust passagesandconnected to an exhaust passageon the engine side; a shutoff valvecapable of shutting off exhaust gas at the exhaust inletsandof the branch exhaust passagesand; a nitrogen oxide adsorbing material, disposed inside each of the branch exhaust passagesor, temporarily adsorbing nitrogen oxides in an excess air atmosphere, and detaching the adsorbed nitrogen oxides in a rising temperature atmosphere or a reducing atmosphere; a first combustion device, disposed on the exhaust upstream side of the nitrogen oxide adsorbing materialinside each of the branch exhaust passagesor, having an air nozzle, and changing the air supplied from the air nozzleinto the rising temperature atmosphere or the reducing atmosphere; and a second combustion device, disposed on the exhaust downstream side of the nitrogen oxide adsorbing materialinside each of the branch exhaust passagesorand including an air nozzle, a fuel nozzleand an ignition nozzle, wherein the ratio of fuel and air supplied from the first combustion deviceis controlled within the range of 0.6<λ<1.0, where λis an excess air ratio.