Bicycle Gear Shifting Algorithm with User-Defined Parameters
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Solution Overview
Problem
Cyclists find existing automatic gear shifting systems for bicycles insufficiently customizable to their individual needs and abilities, leading to discomfort and reduced driving safety and comfort.
Innovation Solution
A device and method for automatically shifting bicycle gears that allow cyclists to input personalized settings for gear selection based on level road, driving speed, and terrain gradient, enabling an individualized shifting strategy that mimics manual adjustment, using a computing unit, sensors, and a user-friendly input system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a standard automatic gear shifting system is used, then the shifting process is automated, but the system is not sufficiently customizable to individual cyclist needs and abilities
Solution Approach 1:
The system transitions from a static, fixed gear shifting algorithm to a dynamic, adaptable system that adjusts shifting behavior based on individual cyclist preferences. The control unit stores multiple shifting strategies (first, second, third strategies) and can switch between them or combine them based on real-time conditions and user selections, making the automation adaptable to individual needs.
Solution Approach 2:
The system allows modification of key parameters in the gear shifting algorithm, such as the relationship between pedaling force, speed, and gear selection. By enabling users to adjust these parameters through the operating unit, the system transforms a rigid automated system into a flexible one that can be tailored to different cycling styles, fitness levels, and preferences.
2Ease of operation
If the shifting strategy is highly individualized, then driving comfort and safety are enhanced, but the device complexity increases
Solution Approach 1:
The control system is segmented into modular components: a base automatic shifting algorithm, multiple optional shifting strategies (first, second, third), and an operating unit for user interaction. This segmentation allows the system to maintain a simple core functionality while offering optional complexity through selectable strategies, managing overall system complexity while enabling customization.
Solution Approach 2:
The control unit is designed to perform multiple functions: it executes the basic automatic shifting algorithm, stores and retrieves multiple different shifting strategies, processes user inputs through the operating unit, and adapts the shifting behavior accordingly. This multi-functionality consolidates what could be separate complex systems into a single integrated unit, managing complexity while providing comprehensive customization.
3Adaptability or versatility
If multiple shifting strategies are stored in the computing unit, then adaptability to different conditions improves, but the information storage requirements increase
Solution Approach 1:
Different shifting strategies are stored as distinct, localized data sets within the control unit, each optimized for specific cycling conditions or preferences (e.g., aggressive shifting, conservative shifting, touring mode). This localized organization allows the system to store multiple strategies efficiently without requiring a complete redesign of the storage architecture, balancing adaptability with storage requirements.
Data Source
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AI summary
The invention relates to a device (1) and a method for automatically shifting a gearshift mechanism (2) of a bicycle, in particular of an electric bicycle. The device (1) comprises at least one shifting actuator (3) for automatically actuating the gearshift mechanism (2), at least one computing unit (4) which is connected to the at least one shifting actuator (3), an operating and display unit (5) which is connected to the at least one computing unit (4), at least one slope angle sensor (6) for detecting a current terrain slope, and at least one further sensor (7) for detecting a current riding speed of the bicycle, wherein the at least one slope angle sensor (6) and the at least one further sensor (7) are connected to the at least one computing unit (4). A shifting algorithm which can be individualized on the basis of three input values is stored in the at least one computing unit (4), wherein the input values are input individually by the bicycle rider.