Patent ID: 6364044
Filing Date: 2002-04-02
Classification: B62M,F16H

Abstract:
A control system for a motor-assisted bicycle, comprising:a chain that drives said bicycle, and a driving device that outputs supplemental power; wherein said control system comprises a control unit to control a power output level of said driving device, a sensor unit comprising a holding plate mounted on said motor-assisted bicycle, a lever pivotally mounted on said holding plate, an engaging element mounted on an end of said lever such that said engaging element engages said chain from above, and a spring having an elastic force which urges said engaging element against said chain, and a cable connecting said lever to said control unit, there being a plurality of connection points on said-lever to connect said cable to said lever, each said connection point establishing a different effective lever arm length of said lever, thereby allowing a user to vary an amount of force necessary to displace said cable; and wherein changing tension of said chain causes a movement of said lever of said control unit, said movement of said lever being transmitted by said cable to said control unit to control said power output level of said driving device.