Yamaha Hatsudoki Kabushiki Kaisha

Satoshi Kamiya

Masanori Negoro

Nobuyasu Arimune

Hirokatsu Kishita

Yuki Kinpara

Shinjiro Nozawa

A battery-assisted bicycle includes a driving unit that increases an assist ratio and provides a smooth assist control that does not make a rider feel uncomfortable. The driving unit includes a crankshaft to which pedals are to be connected, a crank rotation detector that detects rotation of the crankshaft, and an assist control stopping unit programmed to stop an assist control in response to the rotation of the crankshaft detected by the crank rotation detector.

Driving unit and battery-assisted bicycle

A driving unit and a battery-assisted bicycle include a stopping assist control without making a rider feel uncomfortable. The driving unit includes a crankshaft to which pedals are to be connected, a torque detector that detects a torque generated at the crankshaft, and an assist control stopping unit that stops an assist control based on an amplitude of a torque detected by the torque detector while the crankshaft rotates in a prescribed rotation angle range.

Growing community of inventors

Shizuoka, Japan

Satoshi Kamiya