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:
Jun. 21, 2005
Filed:
Aug. 08, 2003
Toshihiro Hamahata, Saitama, JP;
Toshihiro Hamahata, Saitama, JP;
Abstract
Increase in quantity of particulates during a prescribed time period is acquired as first difference data (DX) that is based on pressure differential ΔP across a filter () and derived from first estimation data (D) obtained from a first estimation calculator () and is simultaneously acquired as second difference data (DY) that is based on integration of the quantity of particulate generation per unit time and derived from second estimation data (D) obtained from a second estimation calculator (), and the second estimation data (D) is corrected using correction data (D) calculated from the first and second difference data (DX, DY) to acquire corrected second estimation data (D). A discriminator () determines which of the first estimation data (D) and corrected second estimation data (D) is suitable data and the regeneration control of the filter is conducted using the so-selected estimation data (Q).
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