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:
Dec. 26, 2006
Filed:
Jan. 08, 2004
Toshimasa Koga, Yokohama, JP;
Junichi Kawashima, Kanagawa, JP;
Naoya Tsutsumoto, Yokohama, JP;
Terunori Kondou, Yokohama, JP;
Makoto Otake, Yokohama, JP;
Takao Inoue, Yokohama, JP;
Toshimasa Koga, Yokohama, JP;
Junichi Kawashima, Kanagawa, JP;
Naoya Tsutsumoto, Yokohama, JP;
Terunori Kondou, Yokohama, JP;
Makoto Otake, Yokohama, JP;
Takao Inoue, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An exhaust gas purifying system of a diesel engine comprises a PM filter installed in an exhaust passage line of the engine to collect particulate matter (PM) in the exhaust gas from the engine; a pressure difference sensor for detecting a pressure difference between upstream and downstream portions of the PM filter; a control unit which comprises a collected PM amount estimating section that estimates an amount of collected PM in the PM filter based on the pressure difference; and a reactivation timing judging section that, based on the estimated amount of the collected PM, judges a reactivation time when the reactivation of the PM filter is needed; and a reactivation carrying out system that, upon judgment of the reactivation time, carries out a predetermined operation to increases the temperature of the PM filter thereby to burn the collected PM. The control unit further comprises a dispersion condition judging section that judges a dispersion condition of the collected PM in the PM filter; and a correction section that corrects the estimated amount of the collected PM in accordance with the judged dispersion condition of the collected PM.