Endless belt power transmission systems or components – Control for variable input to output speed-ratio
Patent
1992-06-19
1993-11-16
Bui, Thuy M.
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
474 78, F16H 5900
Patent
active
052618587
ABSTRACT:
A method and system for computer-controlled shifting of a bicycle is provided. In preferred embodiments, the present invention provides a computer system that detects speed, hub speed, and crank speed, determines the optimum bicycle gear selection to maintain a desired cadence, and shifts the bicycle to the optimum bicycle gear. The computer also inputs a shift up and shift down signals from the cyclist to override the computer-selected gear. When the cyclist indicates a shift up or down, the computer adjusts the desired cadence. The computer determines the gear selection to ensure a uniform transition from the current gear to the next gear. The computer ensures that when shifting from the current gear to the next gear, the bicycle does not transition through a gear that is not between the current and next gears.
REFERENCES:
patent: 4490127 (1984-12-01), Matsumoto et al.
patent: 4605240 (1986-08-01), Clem et al.
patent: 4713042 (1987-12-01), Imhoff
patent: 4887990 (1989-12-01), Bonnard et al.
patent: 4952196 (1990-08-01), Chilcote et al.
Zimmer, Carl "Easy Rider," Discover, Aug. 1990, p. 30.
Browning Automatic Transmission
Bui Thuy M.
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