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. 14, 2006
Filed:
Apr. 10, 2002
Applicants:
Shogo Matsubayashi, Osaka, JP;
Tohru Nakazono, Osaka, JP;
Inventors:
Shogo Matsubayashi, Osaka, JP;
Tohru Nakazono, Osaka, JP;
Assignee:
Yanmar Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an internal combustion engine () provided with an NOabsorbing reduction catalyst () in an exhaust gas passage (), there are arranged: an oxygen sensor () which is mounted downstream of the NOabsorbing reduction catalyst () in the exhaust gas passage (); and a determination means for determining a condition of degradation of the NOabsorbing reduction catalyst () on the basis of a time length, during which a voltage value, having a small amount of variation before the voltage value outputted from the oxygen sensor () is recorded as a maximum value when executing a rich spike, is recorded.