Patent ID: 6866111

Claim:
A system for proportionally assisting by a DC motor propulsion of a wheeled vehicle propelled by a user who provides a user effort, comprising: detection and measurement means for detecting and measuring a flexion of a fixed shaft of a wheel of said vehicle on which said DC motor is secured and subjected to said user effort, said detection and measuring means being mounted on a flat vertical surface formed in said fixed shaft; assistance level request means for requesting a level of assistance to be provided; digitizing means for digitizing a signal obtained from said detection and measurement means; effort calculation means to calculate, in real time, the user effort provided by said user using said digitized signal; assistance level calculation means for calculating an appropriate assistance effort to be provided by a DC motor mounted on said wheel using a value of said user effort and a value of said level of assistance requested; control means for controlling an assistance effort to be provided by said DC motor mounted on said shaft of said wheel and using a value of said appropriate assistance effort; wherein said user effort and said level of assistance requested are used to proportionally assist propulsion of said vehicle by said DC motor.