Provided is an electric power assist system (51) that generates an appropriate level of assist power while a vehicle is running on a slope. The electric power assist system usable for an electric assist vehicle (1) includes: an electric motor (53) generating assist power to assist human power of a rider of the electric assist vehicle; a control device (170) controlling a magnitude of the assist power to be generated by the electric motor; and an acceleration sensor (38) outputting an acceleration signal representing an acceleration Gx in a travel direction of the electric assist vehicle. The control device acquires speed information representing a running speed of the electric assist vehicle based on an external signal, detects an inclination angle of a road surface based on the speed information and the acceleration signal, and causes the electric motor to generate assist power of a magnitude in accordance with the inclination angle.
ELECTRIC ASSIST SYSTEM AND ELECTRIC ASSIST VEHICLE
ELEKTRISCHES ASSISTENZSYSTEM UND ELEKTRISCHES ASSISTENZFAHRZEUG
SYSTÈME D'ASSISTANCE ÉLECTRIQUE ET VÉHICULE D'ASSISTANCE ÉLECTRIQUE
2023-04-26
Patent
Electronic Resource
English