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. 30, 2011
Filed:
Mar. 26, 2009
Hideki Matsunaga, Saitama, JP;
Toshikazu Katou, Saitama, JP;
Hiroyuki Kurita, Saitama, JP;
Shinji Kumazawa, Aichi, JP;
Masayuki Motomura, Aichi, JP;
Katsunori Yazawa, Aichi, JP;
Hideki Matsunaga, Saitama, JP;
Toshikazu Katou, Saitama, JP;
Hiroyuki Kurita, Saitama, JP;
Shinji Kumazawa, Aichi, JP;
Masayuki Motomura, Aichi, JP;
Katsunori Yazawa, Aichi, JP;
Nissan Diesel Motor Co., Ltd., Ageo-shi, JP;
NGK Spark Plug Co., Ltd., Nagoya-shi, JP;
Abstract
In an exhaust emission purifying apparatus for reductively purifying NOx in the exhaust emission by using a liquid reducing agent or its precursor, to be referred to as 'liquid reducing agent' herein, a dosing flow rate of the liquid reducing agent according to engine operating conditions is computed, and the dosing of the liquid reducing agent is controlled based on the computed dosing flow rate, and also, it is judged whether or not a supply system of the liquid reducing agent is failed, based on a ratio between an integrated amount obtained by sequentially integrating the dosing flow rate and a consumed amount of the liquid reducing agent.