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. 26, 2014
Filed:
Jul. 07, 2011
Applicants:
Hirotaka Takahashi, Fujisawa, JP;
Masashi Mizutani, Fujisawa, JP;
Takanobu Ogawa, Fujisawa, JP;
Inventors:
Assignee:
Isuzu Motors Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 15/10 (2006.01); F01N 3/20 (2006.01); F02D 41/14 (2006.01); F01N 9/00 (2006.01); F01N 3/035 (2006.01);
U.S. Cl.
CPC ...
G01M 15/10 (2013.01); F02D 41/1461 (2013.01); F02D 41/1463 (2013.01); F01N 3/208 (2013.01); F01N 9/002 (2013.01); Y02T 10/24 (2013.01); F01N 3/035 (2013.01); F01N 2560/026 (2013.01);
Abstract
A NOx sensor diagnosis device which can diagnose validity of a NOx sensor by considering an environmental condition and can prevent erroneous diagnosis, and a selective catalytic reduction system are provided. The device provided in an exhaust pipe of an engine E and diagnosing a NOx sensor that detects NOx concentration in an exhaust gas, a diagnosis prohibition determination unit is provided that prohibits diagnosis of the NOx sensor during diesel particulate filter regeneration, during power take-off operation or during exhaust brake operation.