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Bicycle control system

A bicycle and controller technology, applied in bicycle accessories, electric vehicles, vehicle parts, etc.

Active Publication Date: 2020-08-25
SRAM CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A limitation of automatic shifting algorithms for bicycle transmissions is that shifting can only occur when the drive train is moving (e.g., when the rider is pedaling)

Method used

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  • Bicycle control system
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Examples

Experimental program
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Embodiment Construction

[0075] A bicycle is provided having an electric pedal assist motor capable of driving a crankset independently of a crank. The bike includes wheel speed sensors and crank cadence sensors. The wheel speed sensor and crank cadence sensor measure wheel speed and crank cadence, respectively, and provide the measured wheel speed and crank cadence to an electric rear derailleur or controller of the bicycle. For example, the electric rear derailleur is configured to instruct the electric bicycle controller to activate motor overdrive based on the measured wheel speed and / or the measured crank cadence.

[0076] For example, a rear derailleur, and more specifically, shifting by the rear derailleur, may be configured based on a selected riding mode. The riding mode is selectable from a plurality of different riding modes, and the bicycle's controller or another controller is switchable between two or more of the different riding modes. In each of the different riding modes, the charac...

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PUM

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Abstract

A bicycle control system. A bicycle with an electric pedal assist motor capable of driving a chain ring independent of cranks includes wheel speed sensors and crank cadence sensors. The wheel speed sensors and the crank cadence sensors measure wheel speed and crank cadence, respectively, and provide the measured wheel speed and crank cadence to a controller of the bicycle. The controller activatesthe motor overdrive based on the measured wheel speed and / or the measured crank cadence.

Description

technical field [0001] The present disclosure relates generally to electric bicycles, and more particularly to controls for electric bicycles. Background technique [0002] Bicycles with pedal assist electric motors (eg, electric bicycles or electric vehicles) may include wheel speed sensors and crank speed sensors that may be used as input to the automatic shifting algorithm of the bicycle's transmission. One limitation of automatic shift algorithms for bicycle transmissions is that shifting can only occur when the drive train is moving (eg, when the rider is pedaling). [0003] The pedal assist motor turns the drive chainring independently of the bike's crank. This aspect exists so that when the assist motor is active, the rider does not sense motor torque in the rider's leg if the rider slows down the pedaling rate faster than the assist motor can react. This feature is used as a feature in some e-bike systems where the rider can walk beside the e-bike and can push a bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M6/45B62J45/41B62J45/411B62J45/412
CPCB62M6/45B62J45/41B62J45/411B62J45/412B62M9/123B62M6/55B62M6/50B62M9/132
Inventor S·哈恩布赖恩·乔丹凯文·韦斯林
Owner SRAM CORPORATION