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. 31, 2010
Filed:
Oct. 23, 2008
Nobuyuki Takahashi, Hitachinaka, JP;
Masahiro Sasaki, Hitachinaka, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Mitsuhiko Watanabe, Odawara, JP;
Ryoichi Oura, Hitachinaka, JP;
Nobuyuki Takahashi, Hitachinaka, JP;
Masahiro Sasaki, Hitachinaka, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Mitsuhiko Watanabe, Odawara, JP;
Ryoichi Oura, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
There is proposed a control unit for an internal combustion engine, which comprises a boost circuit, a switching element, a current detecting resistor and a controller and is designed to be actuated such that the boost circuit is used to boost a power source voltage to create a boosted voltage and the controller is used to control the switching element so as to enable the boosted voltage to flow to the injector solenoid coil. This control unit is designed such that, when the boost circuit goes out of order, the injector solenoid coil is excited by making use of the power source voltage without using the boosted voltage and without creating a peak current to thereby generate a first holding current required for opening the injector and a second holding current required for retaining the opened state of the injector, the second holding current being lower in intensity than the first holding current.