Bicycle motor control system
AssigneeShimano Inc.
InventorsYasuhiro Tsuchizawa, Hiroshi Matsuda, Tomohiro Kondo
Life of this patent
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Abstract
A bicycle motor control system, configured to control a drive motor that is provided on a bicycle, comprises a controller configured to control a drive motor that is configured to selectively output driving force in accordance with a manual drive force, and cause the drive motor to stop when a detected manual drive force, sensed by a manual drive force sensor, falls below a predetermined force threshold value, which is set in accordance with a crank angle of a crankshaft.
Claims21
A bicycle motor control system, configured to control a drive motor that is provided on a bicycle comprising a crankshaft that outputs manual drive force to a rear wheel via a sprocket and a chain, the bicycle motor control system comprising:
- a controller configured to control the drive motor that is configured to selectively output driving force in accordance with the outputted manual drive force, and cause the drive motor to stop when a detected manual drive force, sensed by a manual drive force sensor, falls below one of a plurality of predetermined force threshold values, which are set stepwise in accordance with a crank angle of the crankshaft, the crank angle being sensed by a crank rotation sensor, wherein
- minimum predetermined force threshold values are set in accordance with a top dead center crank angle and a bottom dead center crank angle;
- and
- the predetermined force threshold values are set in accordance with the crank angle of the crankshaft and an inclination sensed by an inclination sensor.
A bicycle motor control system, configured to control a drive motor that is provided to a bicycle comprising a crankshaft that outputs manual drive force to a rear wheel via a sprocket and a chain, the bicycle motor control system comprising:
- a controller configured to control the drive motor that is configured to selectively output driving force in accordance with the outputted manual drive force, and cause the drive motor to stop when one of a plurality of conditions is satisfied, wherein the plurality of conditions include:
- when a torque of less than zero, sensed by a torque sensor, and a forward rotation of the crankshaft, sensed by a crank rotation sensor, are detected;
- and
- a predetermined torque threshold value for the torque of less than zero is set based on a crank angle sensed by the crank rotation sensor and an inclination sensed by an inclination sensor.
Dependencies are inferred from the claim text.