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:
Jul. 17, 2007
Filed:
May. 14, 2004
Shinichiro Okugawa, Toyota, JP;
Masumi Kinugawa, Okazaki, JP;
Kazuo Kobayashi, Nagoya, JP;
Tsukasa Kuboshima, Okazaki, JP;
Shinichiro Okugawa, Toyota, JP;
Masumi Kinugawa, Okazaki, JP;
Kazuo Kobayashi, Nagoya, JP;
Tsukasa Kuboshima, Okazaki, JP;
DENSO Corporation, Kariya, JP;
Abstract
A diesel oxidation catalyst is disposed upstream of a diesel particulate filter (a DPF) disposed in an exhaust passage of a diesel engine. An electronic control unit (an ECU) operates a temperature increasing circuit, which performs post-injection, to eliminate particulate matters accumulated in the DPF. The ECU includes a first correcting circuit and a second correcting circuit. The first correcting circuit corrects a manipulated variable of the temperature increasing circuit based on a result of comparison between a target temperature and a temperature of the DPF estimated based on information related to an area upstream of the DPF. The second correcting circuit corrects the manipulated variable of the temperature increasing circuit based on a result of comparison between the target temperature and the temperature of the DPF estimated based on information related to an area downstream of the DPF.