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:
Mar. 20, 2012
Filed:
Oct. 14, 2008
Satoshi Hiranuma, Kawasaki, JP;
Minehiro Murata, Kawasaki, JP;
Yoshinaka Takeda, Kawasaki, JP;
Hiroaki Fujita, Kawasaki, JP;
Satoshi Yamazaki, Kawasaki, JP;
Shinichi Saito, Kawasaki, JP;
Yasuko Suzuki, Kawasaki, JP;
Satoshi Hiranuma, Kawasaki, JP;
Minehiro Murata, Kawasaki, JP;
Yoshinaka Takeda, Kawasaki, JP;
Hiroaki Fujita, Kawasaki, JP;
Satoshi Yamazaki, Kawasaki, JP;
Shinichi Saito, Kawasaki, JP;
Yasuko Suzuki, Kawasaki, JP;
Abstract
An exhaust purification apparatus comprises an ammonia selective reduction-type NOx catalyst that selectively reduces NOx within exhaust gas by using ammonia as a reducing agent, a urea-water supply device that supplies urea-water into the exhaust gas existing upstream of the ammonia selective reduction-type NOx catalyst, and a control unit. The control unit controls the urea-water supply device so that the urea-water is intermittently supplied according to predetermined supply duration time and predetermined supply suspension time when the urea-water is supplied from the urea-water supply device for the purpose of providing ammonia to the ammonia selective reduction-type NOx catalyst.