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. 06, 2007
Filed:
Sep. 07, 2004
Takao Inoue, Yokohama, JP;
Junichi Kawashima, Yokosuka, JP;
Naoya Tsutsumoto, Yokohama, JP;
Makoto Otake, Yokohama, JP;
Terunori Kondou, Yokohama, JP;
Shouichirou Ueno, Yokohama, JP;
Toshimasa Koga, Yokohama, JP;
Takao Inoue, Yokohama, JP;
Junichi Kawashima, Yokosuka, JP;
Naoya Tsutsumoto, Yokohama, JP;
Makoto Otake, Yokohama, JP;
Terunori Kondou, Yokohama, JP;
Shouichirou Ueno, Yokohama, JP;
Toshimasa Koga, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A filter differential pressure, which is the difference between the inlet pressure and the outlet pressure of a DPM filter (), is determined, and switching is performed in accordance with the regeneration condition of the DPM filter () between a first trapped DPM amount calculation process for estimating the trapped DPM amount after complete regeneration, in which all of the DPM trapped in the DPM filter () is burned, and a second trapped DPM amount calculation process for estimating the trapped DPM amount when a part of the DPM trapped in the DPM filter () has been burned away. The trapped DPM amount in the DPM filter () is estimated on the basis of the filter differential pressure using one of the first and second trapped DPM amount calculation processes.