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:
Sep. 15, 1998
Filed:
Jun. 07, 1995
Hajime Soda, Saitama, JP;
Masahiro Kuroki, Saitama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A secondary battery generates an assisting force for a bicycle. When the voltage of the battery drops, a driver can physically feel a variation in driving feeling to indicate a reduction in battery capacity and to also indicate the amount of capacity remaining. The variation in driving feeling is an increase in force required to pedal the bicycle. In other words, when charging is required, the assisting force which assists pedaling by human power will be reduced. A voltage drop detector compares data obtained by A/D conversion of the voltage of a battery with certain reference voltages set in advance and outputs voltage drop detection signals. When the voltage drop detection signal is received by an assisting force variation control, a variation assisting force is output to warn the user that battery charge is low. The variation assisting force is obtained by reducing or varying almost to zero an assisting force calculated by an assisting force calculator. A PWM signal producer outputs a PWM signal in response to the assisting force or the variation assisting force to drive a motor of the bicycle.