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:
Sep. 07, 2010
Filed:
Dec. 19, 2008
Takao Miyake, Hitachinaka, JP;
Masahiro Toyohara, Hitachiohta, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Tohru Ishikawa, Kitaibaraki, JP;
Ryoichi Oura, Hitachinaka, JP;
Takao Miyake, Hitachinaka, JP;
Masahiro Toyohara, Hitachiohta, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Tohru Ishikawa, Kitaibaraki, JP;
Ryoichi Oura, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel injection control apparatus is capable of reducing a minimum quantity of fuel injection without reducing a maximum quantity of injection. To open a fuel injector valve, a driving circuit supplies an electric current from a high-voltage power supply to the fuel injector. Then, after valve opening, the high-voltage power supply is switched to a low-voltage power supply, and an open state of the valve is retained. For opening the valve of the fuel injector, a microcomputer, after supplying current from the high-voltage power supply to the injector, discharges the current rapidly for a decrease below a first current level at which the open state of the valve cannot be retained. The microcomputer then controls the supply current to the injector so as to supply a current at a second current level at which the open state of the valve can be retained.