Bicycle Gear Control Apparatus Low Power Shifting
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Solution Overview
Problem
Conventional bicycle gear changing control systems inhibit the shifting operation of the first gear changing device when the power level of the power supply is below a certain value, limiting rider convenience and power consumption.
Innovation Solution
A bicycle gear changing control apparatus with a power supply sensor and a gear shift controller that individually controls both the first and second gear changing devices when the power level is lower than a specified threshold, allowing shifting operations even when the power level is low by inhibiting high-power consumption shifts and allowing downshifting, and providing notification to the rider.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the shifting operation of the first gear changing device is inhibited when the power level is below a prescribed value, then the power consumption can be suppressed, but the rider convenience is limited
Solution Approach 1:
The gear changing devices are divided into two types: first gear changing device (front derailleur) with high power consumption and second gear changing device (rear derailleur) with low power consumption. The control apparatus selectively inhibits or allows operation of each device based on power level, enabling differentiated power management to suppress overall power consumption while maintaining rider convenience through alternative gear changing options.
Solution Approach 2:
The control apparatus changes the operational parameters (allowing or inhibiting shifting operations) based on the detected power level. When power level is above the prescribed value, both first and second gear changing devices are allowed to operate. When power level drops below the threshold, the first gear changing device is inhibited while the second remains allowed, dynamically adapting system behavior to power availability.
2Use of energy by moving object
If the first gear changing device operation is completely inhibited when power level is low, then power consumption is suppressed, but control flexibility and rider convenience are reduced
Solution Approach 1:
The control apparatus dynamically adjusts the operational status of gear changing devices based on real-time power level detection. The system transitions between different operational modes (both devices allowed, only second device allowed, or selective inhibition) to adapt to changing power conditions, maintaining control flexibility while managing power consumption effectively.
Solution Approach 2:
The power supply sensor continuously detects the power level and provides feedback to the control apparatus. Based on this feedback, the control apparatus adjusts its control strategy for the gear changing devices, creating a closed-loop system that maintains optimal balance between power consumption and control flexibility.
Data Source
AI summary
A bicycle control apparatus is basically provided with a first gear changing device, a second gear changing device, a power supply sensor and a gear shift controller. The first gear changing device has a plurality of first shifting positions. The second gear changing device has a plurality of second shifting positions. The power supply sensor detects a power level of a power supply that is configured to supply power to at least one of the first and second gear changing device. The gear shift controller is programmed to cooperatively control the first and second gear changing devices, the gear shift controller being further programmed to individually control the first and second gear changing devices when the power level detected by the power supply sensor is lower than a first power level.