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:
Oct. 02, 2012
Filed:
Aug. 13, 2010
Masahiro Toyohara, Hitachiota, JP;
Takashi Okamoto, Hitachinaka, JP;
Tomohiro Ohisa, Hitachinaka, JP;
Yoshikazu Ishii, Hitachinaka, JP;
Masahiro Toyohara, Hitachiota, JP;
Takashi Okamoto, Hitachinaka, JP;
Tomohiro Ohisa, Hitachinaka, JP;
Yoshikazu Ishii, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
A fuel injection control apparatus for an internal combustion engine which can inject a fuel injection quantity to a fuel injector with accuracy even when the fuel injection quantity is reduced than before is provided. A fuel injection control apparatus of a direct cylinder injection type of internal combustion engine, including a fuel injector which performs fuel injection by supplying a drive current to a solenoid, a fuel pressure sensor which detects fuel pressure supplied to the fuel injector, and operation state detecting means which detects the operation state of the internal combustion engine, comprises current profile changing meanswhich has multiple current profiles of the drive current and changes current profiles based on the operation state and the fuel pressure, valid pulse width calculating meanswhich calculates a valid pulse width for opening and driving the fuel injector, invalid pulse width calculating meanswhich calculates an invalid pulse width, and fuel injector control means which calculates a fuel injection pulse width based on the valid pulse width and the invalid pulse width, and controls the fuel injector based on the fuel injection pulse width, wherein the invalid pulse width calculating meanscalculates an invalid pulse width corresponding to the current profiles to be changed before the current profiles are changed.