Bicycle Control Device Dynamic Speed Adjustment
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Solution Overview
Problem
Existing bicycle control devices do not adequately adjust motor assistance based on varying usage environments and bicycle postures, such as inclination angles, which can affect safe and efficient travel.
Innovation Solution
A bicycle control device with an electronic controller that adjusts motor assistance based on the usage environment and posture of the bicycle, including inclination angles, to optimize travel speed and safety by changing the predetermined speed settings accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the motor assists with propulsion at a fixed predetermined speed, then the control system is simple, but the bicycle cannot adapt to different usage environments and postures
Solution Approach 1:
The predetermined speed is made dynamic rather than fixed. The electronic controller automatically adjusts the predetermined speed based on detected usage environment (inclination angle of road surface) and bicycle posture (inclination angle of bicycle), allowing the motor assistance characteristics to adapt to different conditions without requiring manual intervention or complex user input
Solution Approach 2:
The system incorporates feedback mechanisms through detection units that continuously monitor the usage environment and bicycle posture. The electronic controller uses this feedback information to automatically adjust the predetermined speed, creating a closed-loop control system that adapts to changing conditions while maintaining manageable complexity through automated decision-making
2Reliability
If the predetermined speed is lowered on inclines to maintain safety, then safety is improved, but the traveling speed is reduced
Solution Approach 1:
The system changes the speed parameter dynamically based on the inclination angle of the road surface and bicycle posture. When an incline is detected, the predetermined speed is automatically lowered to maintain safety. This parameter adjustment is transparent to the user and occurs automatically, resolving the contradiction between safety requirements and speed maintenance through environmental adaptation rather than manual control
Data Source
AI summary
A bicycle control device is configured to appropriately control a motor. The bicycle control device is provided in a bicycle driving device. A bicycle control device includes an electronic controller that controls a motor, which assists with propulsion of a bicycle. In a case where a traveling speed of the bicycle is less than or equal to a predetermined speed, the electronic controller controls the motor so that the motor assists with propulsion of the bicycle. The predetermined speed is changed in accordance with at least one of a usage environment of the bicycle and a posture of the bicycle.