Control system for electric bicycles

Abstract

An electric bicycle includes two pedals, a motor, a battery providing power to the motor, a first detection member for detecting acceleration of the electric bicycle and trading acceleration of the pedals, and a controller. The controller receives the acceleration of the electric bicycle and the treading acceleration of the pedals from the first detection member, and then controls output of the motor and the battery. When the treading acceleration of the pedals is larger than the acceleration of the electric bicycle, the controller concludes that the resistance from outside to the electric bicycle increases, the controller increases output of the motor and the battery. When the treading acceleration of the pedals is smaller than the acceleration of the electric bicycle, the controller concludes that the resistance from outside to the electric bicycle decreases, the output of the motor and the battery is reduced.

Description

BACKGROUND OF THE INVENTION1. Fields of the Invention[0001]The present invention relates to an electric bicycle, and more particularly, to a control system for an electric bicycle.2. Descriptions of Related Art[0002]One of the conventional electric bicycle control systems known to applicant comprises a body, a rear wheel unit removably connected to the bicycle frame, a detection module connected to a transmission part of the bicycle so as to detect the operation of the transmission part and generate operational signals, a driving module, multiple driving units, a power module and a control module. The driving module includes a driving unit connected to the body and including multiple driving members. The driving units are connected to the driving members and rotatably connected to the rear wheel unit. The power module is electrically connected to the driving module and the detection module. The control module is electrically connected to the driving module, the detection module and ...

AI Technical Summary

Benefits of technology

[0008]When the treading acceleration of the pedals is larger than the acceleration of the electric bicycle, the controller concludes that the resistance from outside to the electric bicycle increases, the controller increases output of the motor and the battery. When the treading acceleration of the pedals is smaller than the acceleration of the electric bicycle, the controller concludes that the resistance from outside to the electric bicycle decreases, the controller reduces output of the motor and the battery.

[0009]Preferably, the treading acceleration of the pedals is composed of a first component force that has the same direction as the treading acceleration of the pedals, and a second component force that is perpendicular to the direction as the treading acceleration of the pedals. A comparison between a ratio of the first component force to the second component force and the acceleration of the electric bicycle is made, the controller increases or reduces output of each of the motor and the battery according to the comparison.

Problems solved by technology

However, the conventional control system only adjusts the internal resistance of the transmission in the bicycle.

The conventional control system cannot monitor and adjust the whole momentum of the bicycle.

When different riders of different weights operate the bicycle, the conventional control system cannot respond properly.

Besides, the conventional control system cannot properly provide or adjust the assistance power to the bicycle when the bicycle is operated along roads of different inclinations.

When the bicycle is operated on downhill roads, the assistance force from the control system cannot be properly reduced, so that the rider has to brake frequently.

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