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. 21, 2009
Filed:
Jan. 23, 2008
Shinji Nakagawa, Hitachinaka, JP;
Kazuhiko Kanetoshi, Hitachinaka, JP;
Kozo Katogi, Hitachi, JP;
Takanobu Ichihara, Naka, JP;
Minoru Osuga, Hitachinaka, JP;
Shinji Nakagawa, Hitachinaka, JP;
Kazuhiko Kanetoshi, Hitachinaka, JP;
Kozo Katogi, Hitachi, JP;
Takanobu Ichihara, Naka, JP;
Minoru Osuga, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Exhaust emission control is exercised to restrict the exhaust amounts [g] of HC, CO, NOx, and the like. However, since the intake air amount for startup unduly increases due to an engine speed overshoot for startup, the exhaust amounts of HC, CO, and NOx increase excessively. Therefore, there is a need for optimizing the intake air amount for startup. The present invention proposes an engine startup control method that assures excellent startability and low exhaust emissions (small gas amount). Disclosed is an engine control device for starting an engine (from its stop state). The engine control device includes a section for setting a target engine operating state of each combustion; a section for detecting an actual engine operating state of each combustion; and a section for computing a control parameter for each subsequent combustion in accordance with the target engine operating state of each combustion and the actual engine operating state of each combustion.