Patent ID: 6926637
Filing Date: 2005-08-09
Classification: B62M,Y10T

Abstract:
1. A control device for a bicycle having a transmission with a plurality of speed steps, wherein the control device comprises: a traveling condition signal receiver that receives traveling condition signals corresponding to a traveling condition value of the bicycle; wherein the traveling condition signal corresponds to an alternating current generator signal adapted to provide operating power to electrical components mounted to the bicycle, wherein the traveling condition signal has a frequency derived from a frequency of the alternating current generator signal so that a plurality of traveling condition values are produced for each revolution of a bicycle wheel; a threshold value memory that stores a first threshold value of the traveling condition; and a processor that compares a combination of a plurality of the traveling condition values to the first threshold value and provides a first control signal for shifting the bicycle transmission when the combination of the plurality of traveling condition values pass the first threshold value to reduce the generation of the first control signal in response to fluctuations in frequency of the alternating current generator signal.