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:
Nov. 10, 2009
Filed:
Sep. 01, 2006
Yasuhiro Kariya, Obu, JP;
Shigeto Yahata, Obu, JP;
Tsukasa Kuboshima, Okazaki, JP;
Masumi Kinugawa, Okazaki, JP;
Kanehito Nakamura, Ichinomiya, JP;
Yasuhiro Kariya, Obu, JP;
Shigeto Yahata, Obu, JP;
Tsukasa Kuboshima, Okazaki, JP;
Masumi Kinugawa, Okazaki, JP;
Kanehito Nakamura, Ichinomiya, JP;
Denso Corporation, Kariya, JP;
Abstract
An exhaust gas purifying apparatus for an internal combustion engine includes a collector, which collects exhaust particles in exhaust gas. The apparatus computes a pressure-difference-based measured value of a collected amount of the particles based on a pressure difference, and computes a pressure-difference-based estimated value by correcting the measured value. The apparatus computes an operational-state-based estimated value of the collected amount. The apparatus regenerates the collector by burning the exhaust particles when one of the pressure-difference-based estimated value and the operational-state-based estimated value reaches a predetermined value. The apparatus computes a current pressure-difference-based estimated value by correcting a current pressure-difference-based measured value based on information related to an immediately preceding operational-state-based computing period such that the current pressure-difference-based estimated value ranges from the current measured value to a previous pressure-difference-based estimated value.