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Bicycle drive apparatus

  • US 8,781,663 B2
  • Filed: 08/21/2012
  • Issued: 07/15/2014
  • Est. Priority Date: 08/29/2011
  • Status: Active Grant
First Claim
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1. A bicycle drive apparatus comprising:

  • a bicycle crankset;

    a bicycle transmission;

    a drive assistance electric motor;

    a crank variation determining sensor arranged to determine a variation value related to rotation of the bicycle crankset anda microcomputer includinga shift command section that issues a shift command commanding the bicycle transmission to change gears,a limiting section that limits an output of the drive assistance electric motor upon issuance of the shift command,a determining section that determines completion of a gear shift operation upon the variation value being within a prescribed range, anda limitation cancelling section that cancels the limitation of the output of the drive assistance motor upon the determining section determining the completion of the gear shift operation.

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