Honda Motor Co., Ltd.

The Furukawa Electric Co., Ltd.

Furukawa Automotive Systems Inc.

Naoki Ishiyone

Masayuki Yamazaki

Etsuzo Sato

Koji Yamaoka

Hideaki Ishihara

Fukuda Kazumi

A current detecting unit (current sensor) detecting a current value of a current flowing in a secondary battery; an extreme value detecting unit (CPU) detecting a first extreme value of a current after an inrush current flows from the secondary battery to a starter motor after electricity to the starter motor is turned on based on the current value; an inflection point detecting unit (CPU) detecting a first inflection point of the current after the inrush current flows based on a variation of the current value per a predetermined time; and a calculation unit (CPU) selecting the inflection point when timings when the extreme value and the inflection point are detected are separated for a predetermined time or more, and selecting either one of the extreme value or the inflection point in the other cases to set as a starting current, and calculating a starting voltage from the starting current, an internal resistance of the secondary battery, and a voltage before starting being a voltage of the secondary battery before the electricity to the starter motor is turned on, are included.

Secondary battery state detecting device and secondary battery state detecting method

A wiper apparatus includes: a wiper switch; an operation state detection device; a control device having an output section and an input section; a wiper motor; and a power supply. The wiper motor and the control device are connected by a single signal line; the operation state detection device and the input section are connected to the signal line; and the control device performs input of the wiper operating signal from the signal line when a predetermined period of time has elapsed from a point in time when an output of a wiper driving signal from the output section has stopped.

Wiper apparatus

Growing community of inventors

Tokyo, Japan

Naoki Ishiyone