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. 31, 2010
Filed:
Dec. 22, 2006
Isamu Kanaya, Ageo, JP;
Koutarou Honda, Ageo, JP;
Tomoko Amemiya, Ageo, JP;
Kiminobu Hirata, Ageo, JP;
Nobuhiko Masaki, Ageo, JP;
Shinya Obana, Ageo, JP;
Daisuke Shirai, Yokohama, JP;
Hitoshi Hiramoto, Yokohama, JP;
Naobumi Yamada, Yokohama, JP;
Isamu Kanaya, Ageo, JP;
Koutarou Honda, Ageo, JP;
Tomoko Amemiya, Ageo, JP;
Kiminobu Hirata, Ageo, JP;
Nobuhiko Masaki, Ageo, JP;
Shinya Obana, Ageo, JP;
Daisuke Shirai, Yokohama, JP;
Hitoshi Hiramoto, Yokohama, JP;
Naobumi Yamada, Yokohama, JP;
Nissan Diesel Motor Co., Ltd., Ageo-Shi, JP;
Tokyo Roki Co., Ltd., Yokohama-Shi, JP;
Abstract
An exhaust emission purifying apparatus has a NOx reduction catalytic converter in an exhaust passage of an engine, for purifying nitrogen oxides in the exhaust gas by reduction with urea aqueous solution; an injection nozzle injecting the urea solution toward an exhaust upstream side of the converter in the exhaust passage; and fins disposed on an exhaust upstream side of an injection position of the urea solution in the injection nozzle, for generating a spiral swirling flow of the gas swirling about a center corresponding to the central axis of an exhaust pipe. The swirling flow generated in the exhaust gas prior to the injection-supply of the urea aqueous solution promotes mixing of the solution with the gas to thereby promote the hydrolysis of the urea solution. And the exhaust gas and ammonia generated from the urea solution are uniformly mixed together.