Bicycle gear changing control apparatus, electrically assisted system, and bicycle gear changing control method

A technology of a control device and a control method, which is applied in the directions of bicycle gear shifting mechanisms, bicycle accessories, vehicle gearboxes, etc., can solve problems such as the annoying feeling of changing gear ratios

Active Publication Date: 2016-02-03
SHIMANO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the driver will feel annoyed by the operation of changing the gear ratio

Method used

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  • Bicycle gear changing control apparatus, electrically assisted system, and bicycle gear changing control method
  • Bicycle gear changing control apparatus, electrically assisted system, and bicycle gear changing control method
  • Bicycle gear changing control apparatus, electrically assisted system, and bicycle gear changing control method

Examples

Experimental program
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Embodiment Construction

[0032] Such as figure 1 As shown, the bicycle 10 includes a vehicle frame 12, a handlebar 14, a front wheel 16, a rear wheel 18, a driving mechanism 20, a speed changer 24, a generator 26, a pedal force sensor 28, a speed change operation part 30, a power assist mechanism 32, and a control unit 60 ( refer to figure 2 ) and battery 34.

[0033] The drive mechanism 20 includes left and right crank arms 36 , a crank shaft 38 , left and right pedals 40 , a front sprocket 42 , a rear sprocket 44 , and a chain 46 . The left and right crank arms 36 are attached to the vehicle frame 12 so as to be rotatable with respect to the vehicle frame 12 via one crank shaft 38 . The pedal 40 is attached to the crank arm 36 so as to be rotatable about the pedal axis with respect to the crank arm 36 .

[0034] The front sprocket 42 is connected to the crankshaft 38 . The front sprocket 42 is disposed coaxially with the crankshaft 38 . The front sprocket 42 and the crankshaft 38 may be connec...

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PUM

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Abstract

A bicycle gear changing control apparatus includes a controller that is programmed to control a gear changing state of a bicycle transmission according to an operation of a gear changing operating device upon determining a bicycle traveling speed is greater than a first speed. The controller controls the transmission automatically to be in a first prescribed gear changing state upon determining the bicycle traveling speed becomes less than or equal to the first speed and upon determining a gear ratio of a current gear changing state of the transmission is larger than a preset gear ratio of the first prescribed gear changing state. The controller controls the transmission automatically, after controlling the transmission to be in the first prescribed gear changing state, to a larger gear ratio than the gear ratio of the first prescribed gear changing state, upon determining the bicycle traveling speed becomes greater than a second speed.

Description

technical field [0001] The present invention relates to a bicycle gearshift control device for controlling the gearshift state of a bicycle gearshift, an electric power assist system, and a bicycle gearshift control method. Background technique [0002] When the bicycle is pedaled again after the bicycle stops, the smaller the gear ratio, the more the human driving force at the time of pedaling can be reduced. Therefore, the transmission control device for bicycles disclosed in Patent Document 1 changes the transmission ratio to be suitable for pedaling when the bicycle is stopped. [0003] Patent Document 1: (Japanese Patent) Patent No. 2617059. [0004] According to the transmission control device for bicycles of Patent Document 1, the rider can pedal with a relatively light human driving force. On the other hand, the gear ratio changed by the gear shift control device may not be suitable for the gear ratio after depressing the pedal. The transmission control device for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M25/00
CPCB62M25/08F16H59/44F16H61/0213B60W20/30B62M2025/006F16H59/40F16H2059/006B62M11/16F16H2059/446F16H2061/023
Inventor 渡会悦义
Owner SHIMANO INC
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