Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication
Patent
1997-12-18
2000-06-06
Zanelli, Michael J.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
280260, B62M 2508
Patent
active
060730617
ABSTRACT:
A method of shifting a bicycle transmission includes the step of calculating, by a computer, a past period of a wheel revolution. The computer may then calculate a current virtual period of the wheel revolution from the past period. The bicycle transmission is then shifted at a time calculated by the computer within the virtual period. In another embodiment of the present invention, a virtual velocity may be calculated from the past period, and the bicycle transmission may be shifted at the virtual velocity. If desired, the computer may calculate a past velocity from the past period, and the virtual velocity may be calculated from the past velocity. To alleviate stress on the transmission, the bicycle transmission may be shifted when the virtual velocity is less than the past velocity (i.e., during deceleration). Also, the virtual velocity may be set for a smooth transmission from one gear to another.
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Deland James A.
Shimano Inc.
Zanelli Michael J.
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