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:
Aug. 17, 2010
Filed:
Dec. 19, 2008
Masahiro Toyohara, Hitachiohta, JP;
Takao Miyake, Hitachinaka, JP;
Masahiro Sasaki, Hitachinaka, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Masahiro Toyohara, Hitachiohta, JP;
Takao Miyake, Hitachinaka, JP;
Masahiro Sasaki, Hitachinaka, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel injection control apparatus includes a computing unit that calculates a pulse width for a pulse signal which drives the valve of a fuel injector, based on the operational state of the internal combustion engine and fuel pressure detected by a fuel pressure sensor. After a valve-opening command has turned on and a high valve-opening current has been supplied to open the fuel injector valve, a fuel injector driving signal waveform command unit discharges the current and supplies a small hold current Ihto maintain the injector's valve-open state. After the elapse of a predetermined rapid-discharge starting time from the turn-on of the valve-opening command, the fuel injector driving signal waveform command unit rapidly discharges the current until the hold current Ihhas been reached.