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:
Apr. 27, 2010
Filed:
May. 02, 2005
Kazuo Kobayashi, Nagoya, JP;
Shinichiro Okugawa, Toyota, JP;
Kazuo Kobayashi, Nagoya, JP;
Shinichiro Okugawa, Toyota, JP;
DENSO Corporation, Kariya, JP;
Abstract
An exhaust emission control device includes a plurality of devices for removing particulates accumulated in a particulate filter. A temperature increasing device increases a temperature of the particulate filter. A temperature estimator estimates the temperature of the particulate filter. A particulate accumulation quantity estimator estimates a quantity of accumulated particulates. A temperature increase quantity controller controls a temperature increase to an output of the temperature estimator when the quantity of accumulated particulates exceeds a predetermined value. A time ratio processor computes a time ratio between performance and interruption of a temperature increasing operation. A base period processor computes a base period such that the base period varies from time to time. A switching device switches between performance and interruption of the temperature increasing operation based on the time ratio and the period that becomes the base.