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:
Dec. 19, 2006
Filed:
Dec. 16, 2004
Applicants:
Kazuo Kobayashi, Nagoya, JP;
Hiroshi Haraguchi, Kariya, JP;
Inventors:
Kazuo Kobayashi, Nagoya, JP;
Hiroshi Haraguchi, Kariya, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D 31/00 (2006.01); F02M 25/07 (2006.01);
U.S. Cl.
CPC ...
Abstract
Deterioration of emission is restrained even if the actual control condition including the required torque is different from the set control condition. An ECU establishes a control amount of an EGR valve in such a manner that a condition amount, which is a control parameter controlling the EGR valve, is established as a target value. The ECU selects the condition amount as the control parameter among a fresh-air amount, an exhaust oxygen concentration, and an intake oxygen concentration, in which an operation amount of the EGR valve is minimum.