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:
Oct. 19, 2010
Filed:
Jan. 24, 2008
Norikazu Matsuzaki, Mito, JP;
Masaru Ito, Hitachinaka, JP;
Shin Fujiwara, Naka, JP;
Yuuichirou Takamune, Naka, JP;
Kohei Itoh, Hitachiohta, JP;
Norikazu Matsuzaki, Mito, JP;
Masaru Ito, Hitachinaka, JP;
Shin Fujiwara, Naka, JP;
Yuuichirou Takamune, Naka, JP;
Kohei Itoh, Hitachiohta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a four-wheel drive vehicle, front wheelsL andR are driven by an engine, and rear wheelsL andR are driven by an electric motor. A high-power alternatoris driven by the engine, and electric power generated from the alternatordrives the motor. In addition to controlling the power generation of the high-power alternatorand the driving of the motor, a 4WD CUestimates an induced voltage E of the motorfrom a voltage MHV of the motor and from an output current Ia of the high-power alternator, and estimates a rotating speed Nm of the motor from estimation results on the induced voltage E.