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:
Feb. 08, 2005
Filed:
Jun. 03, 2003
Junichi Kawashima, Yokosuka, JP;
Naoya Tsutsumoto, Yokohama, JP;
Munehiro Tabata, Isehara, JP;
Makoto Otake, Yokohama, JP;
Junichi Kawashima, Yokosuka, JP;
Naoya Tsutsumoto, Yokohama, JP;
Munehiro Tabata, Isehara, JP;
Makoto Otake, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An exhaust passage () of a diesel engine () is provided with a filter () for trapping particulate matter. Regeneration of the filter () is divided into first to third phases. In the first phase the filter temperature is raised to the combustion temperature of the particulate matter in a short period of time through control of the exhaust gas temperature. In the second phase, the oxygen concentration of the exhaust gas is held at a predetermined low level while the filter temperature is maintained so as to prevent excessive combustion of particulate matter. In the third phase, wherein the amount of trapped particulate matter has been reduced, the oxygen concentration of the exhaust gas is held at a predetermined high level while the filter temperature is maintained so as to complete the combustion of the trapped particulate matter.