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. 15, 2014
Filed:
Feb. 18, 2010
Chikara Omori, Hitachinaka, JP;
Ryoichi Oura, Hitachinaka, JP;
Mitsuhiko Watanabe, Odawara, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Chikara Omori, Hitachinaka, JP;
Ryoichi Oura, Hitachinaka, JP;
Mitsuhiko Watanabe, Odawara, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
There is provided an internal combustion engine controller that realizes a reduction in maximum current value and current regulation without sacrificing boost performance. An internal combustion engine controllercomprises: a boost coilconfigured to boost a voltage VB of a battery power source; a boost switch elementconfigured to switch between causing a current to flow and stopping a current from flowing through the boost coil; and a current detection portionconfigured to detect a current flowing through the boost switch element, wherein boost control is effected by repeating the switching of the switch element, the voltage boosted at the boost coilis charged to a boost capacitorvia a diode, and, during the boost control, the internal combustion engine controllermakes the boost switch elementstop the current flowing through the boost coilwhen the detected current reaches a switching stop current value and, after a predetermined set time Tdown has elapsed from the point at which current flow is stopped, makes the boost switch elementcause a current to flow through the boost coil