| 摘要 |
A system of sensors for electric bicycle with modular and expansible assisted pedal stroke in function of the necessities and sophistication of the required control for the bicycle consists of at least a sensor, integral with the freewheel, said sensor sensing the rotation caused by the pedals acting on the freewheel by means of the chain or the stopping of the freewheel caused by the stopped drive of the pedals, supplying, in such way, to the control central unit the informing criterion for allowing the beginning, the continuation or cessation of the propulsive contribution of an auxiliary electric motor.
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