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. 12, 1999
Filed:
Apr. 22, 1997
Applicant:
Inventors:
Fuyuki Maehara, Kariya, JP;
Hirohide Sato, Toyokawa, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
322 28 ; 322 18 ;
Abstract
Battery voltage is compared by a comparator so that when the voltage of a normally-charged battery becomes higher than a normal reference voltage, it is regulated to be as high as a normal reference voltage. When an average value of the battery voltages in a period encompassing a typical operating speed of the engine becomes higher than an upper level, the reference voltage is lowered. On the other hand, when the average of the battery voltages in such period becomes lower than a lower level, the reference voltage is increased.