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:
Jan. 01, 2008
Filed:
Mar. 11, 2005
Shinichiro Okugawa, Toyota, JP;
Kazuo Kobayashi, Nagoya, JP;
Hiroshi Haraguchi, Kariya, JP;
Denso Corporation, Kariya, JP;
Abstract
An oxidation catalyst is disposed upstream of a diesel particulate filter (DPF) in an exhaust passage of a diesel engine. An electronic control unit (ECU) operates temperature increasing circuit to combust and eliminate particulate matters deposited on the DPF. The ECU determines execution and stoppage of regeneration of the DPF based on a quantity of the particulate matters deposited on the DPF. The ECU increases an exhaust gas recirculation quantity (EGR quantity) during the regeneration to reduce an intake air quantity from the intake air quantity in a non-regeneration period and to achieve a flow rate of the exhaust gas passing through the DPF suitable for the temperature increase. The ECU corrects a valve opening degree of an EGR control valve based on the sensed intake air quantity to reduce a variation in the exhaust gas flow rate.