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:
May. 29, 2007
Filed:
Oct. 25, 2005
Kazuyuki Watanabe, Kariya, JP;
Tadatoshi Asada, Anjo, JP;
Kazuyuki Watanabe, Kariya, JP;
Tadatoshi Asada, Anjo, JP;
Denso Corporation, Kariya, JP;
Abstract
The vehicle power-generation control unit includes a voltage detecting circuit detecting a generation voltage of a vehicle generator driven by a vehicle engine, a switching device allowing an exciting current to flow into an exciting winding of the vehicle generator when the switching device is in an on state, an average duty ratio detecting circuit detecting a temporal average duty ratio of the switching device on the basis of the generation voltage, an enhanced duty-cycle signal generating circuit generating an enhanced duty-cycle signal having a duty ratio equal to the temporal average duty ratio added with a supplementary duty ratio determined depending on at least one of vehicle state information and vehicle generator state information, and a driver circuit driving the switching device with the duty ratio of the enhanced duty-cycle signal when the generation voltage detected by the voltage detecting circuit is lower than a predetermined target voltage.