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:
Jan. 29, 2013
Filed:
Jan. 25, 2008
Applicant:
Eiichi Kitazawa, Saitama, JP;
Inventor:
Eiichi Kitazawa, Saitama, JP;
Assignee:
Bosch Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 11/00 (2006.01); G01M 15/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A trouble diagnosis device and method for an NOsensor for determining abnormality of an NOsensor used in an exhaust gas purification system. The device can perform a trouble diagnosis without forcedly creating a diagnosis mode during operation of an internal combustion engine and without deterioration of drivability or fuel consumption. The device detects the time-lapse variation of the exhaust NOflow rate suitable for diagnosis in a normal operation mode and determines whether the NOsensor responds with following this variation.