Bicycle Gear Control for Automatic Shifting at Starts and Stops
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Solution Overview
Problem
Existing bicycle control systems face challenges in automatically shifting gears when stopping or starting, especially on inclines, and lack customization options and adaptability, leading to inefficient battery usage and unsynchronized wireless components.
Innovation Solution
A system control device with a processor and memory that determines automatic mode entry conditions, adjusts shifting based on cadence parameters, and modifies shifting parameters dynamically, allowing for customizable automatic shifting modes and synchronization of wireless components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If traditional automatic transmission systems are used to automatically shift gears throughout the entire range including from dead stop, then the bicycle can maintain steady gear changes, but the system consumes excessive battery power and lacks adaptability to different riding conditions
Solution Approach 1:
The system dynamically adjusts the automatic shifting operation based on bicycle speed conditions. When the bicycle is moving, the system maintains automatic shifting capability. When the bicycle stops, the system suspends automatic shifting operations, thereby adapting the automation level to current operating conditions and reducing unnecessary battery consumption.
Solution Approach 2:
The system changes the operational parameters of automatic shifting based on speed conditions. By monitoring bicycle speed and adjusting whether automatic shifting is active or suspended, the system optimizes energy usage while maintaining gear change functionality when needed.
2Adaptability or versatility
If traditional automatic transmission systems attempt to shift gears from dead stop and throughout entire range, then complete gear coverage is achieved, but the system lacks adaptability to different terrains and riding conditions
Solution Approach 1:
The system applies different control strategies to different operating conditions. When the bicycle is moving, full automatic shifting functionality is available. When stopped, the system suspends automatic shifting. This localized adaptation to speed conditions provides versatility without requiring complex terrain-specific control logic.
Solution Approach 2:
The control system dynamically adjusts its behavior based on real-time speed data, enabling adaptability to different riding scenarios (moving vs. stopped) without requiring pre-programmed terrain-specific parameters or complex decision-making algorithms.
3Ease of operation
If multiple gears are provided to maintain preferred pedaling cadence, then rider control over cadence is improved, but the frequency of shifting increases especially during large speed changes
Solution Approach 1:
The system provides self-service automatic gear shifting when the bicycle is in motion, eliminating the need for manual shifting operations. The automatic system monitors cadence and speed, and performs gear changes autonomously, reducing the time and effort required for frequent shifting during variable speed conditions.
4Adaptability or versatility
If static and pre-set control variables are used for automatic shifting, then system simplicity is maintained, but rider customization options are limited
Solution Approach 1:
The system transitions from static pre-set variables to dynamic, rider-customizable parameters. Riders can adjust cadence thresholds, speed ranges, and shifting behavior to match their preferences and riding styles, with the system adapting in real-time based on these customized settings and actual riding conditions.
Data Source
AI summary
A bicycle control system may be configured to automatically control a bicycle, or components thereof. The bicycle control system may include a system control device configured to provide a simplified shifting system wherein large changes in speed associated with starting and stopping do not require the full attention of the automatic shifting system. The shifting system, or a system control device configured for controlling the shifting system, may be configured to determine when to enter an automatic shifting control mode, establish parameters for the automatic shifting of the automatic shifting control mode, and/or compare detected activities and values of the bicycle to the established parameters.