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:
Dec. 20, 2011
Filed:
Feb. 17, 2009
Takuya Mayuzumi, Hitachinaka, JP;
Mitsuhiko Watanabe, Odawara, JP;
Ryoichi Oura, Hitachinaka, JP;
Masahiro Sasaki, Hitachinaka, JP;
Takuya Mayuzumi, Hitachinaka, JP;
Mitsuhiko Watanabe, Odawara, JP;
Ryoichi Oura, Hitachinaka, JP;
Masahiro Sasaki, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An internal combustion engine controller comprises a booster coil connected to a battery and a booster capacitor. A switch element is connected to the booster coil to control the passage of current through the booster coil and an interruption of the current. The booster capacitor accumulates electrical energy generated with an inductance of the booster coil at the time of the interruption of the passage of the current. A booster control circuit carries out control in a constant boost switching cycle so as to pass the current through the booster coil and the switch element until the current reaches a preset switching stop threshold value and then interrupt the current to charge the energy generated with the inductance of the booster coil into the booster capacitor. The booster control circuit is configured to ensure a minimum time period for the booster capacitor-charging of the energy within the boost switching cycle.