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:
May. 04, 2010
Filed:
Jun. 04, 2007
Applicants:
Jyun Kawamura, Chita-gun, JP;
Masakuni Yokoyama, Tokai, JP;
Inventors:
Jyun Kawamura, Chita-gun, JP;
Masakuni Yokoyama, Tokai, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An exhaust purification device is provided to selectively perform a combustion purge control and an exhaust addition purge control in response to an operation state of the internal combustion engine. The combustion purge control process is performed in the case where a NOx occlusion amount of a NOx catalyst is larger than or equal to a first threshold value, and the exhaust addition purge control process is performed in the case where the NOx occlusion amount of the NOx catalyst is larger than or equal to a second threshold value which is larger than the first threshold value.