Gear Changing Control Apparatus for Assisted Bicycles
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Solution Overview
Problem
Assisted bicycles lack effective gear changing control systems that adapt to different operation modes of auxiliary power devices, leading to suboptimal riding comfort due to inconsistent gear shifting frequencies and ranges.
Innovation Solution
A gear changing control apparatus that includes a controller and a traveling state detecting unit, which selects and adjusts the gear changing range and frequency based on specific operation modes of the auxiliary power device, optimizing gear shifting according to detected traveling states and parameters related to time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gear changing control is not adapted to different operation modes, then the device complexity is reduced, but the riding comfort deteriorates due to inconsistent gear shifting frequencies
Solution Approach 1:
The gear changing control system dynamically adjusts the gear changing range based on the detected operation mode. The controller selects different gear changing ranges from multiple predetermined ranges according to the operation mode, making the system adaptable rather than fixed, thereby improving riding comfort without requiring overly complex manual intervention mechanisms
Solution Approach 2:
The system automatically detects the operation mode and autonomously selects the appropriate gear changing range without requiring manual input from the rider. The traveling state detecting unit and controller work together to self-adjust the gear changing parameters, reducing the burden on the rider while maintaining optimal gear shifting behavior for each operation mode
2Productivity
If gear changing range is fixed for all operation modes, then the control system is simpler, but the gear shifting frequency becomes inconsistent and suboptimal
Solution Approach 1:
The system changes the gear changing range parameter based on the operation mode. Multiple predetermined gear changing ranges are stored, and the controller selects the appropriate range by changing this parameter according to the detected operation mode, thereby optimizing gear shifting efficiency for each mode without requiring a completely different control system for each mode
3Adaptability or versatility
If multiple gear changing ranges are provided for different operation modes, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The gear changing ranges are segmented into multiple predetermined ranges, each optimized for specific operation modes. The controller divides the control task by selecting from these pre-segmented ranges based on the detected operation mode, making the system adaptable to different modes while keeping the control structure manageable through pre-defined segments rather than requiring complex real-time calculations
Data Source
AI summary
A gear changing control apparatus is provided for controlling a gear changing device of a bicycle according to a plurality of operation modes of an auxiliary power device that assists a manual drive force of the bicycle. The control apparatus includes a controller and a traveling state detecting unit. The traveling state detecting unit is configured to detect a traveling state of the bicycle. The controller controls the gear changing device and controls the auxiliary power device to operate in one of the plurality of operation modes. The controller is configured to select a gear changing range to be used according to a selected operation mode from the plurality of operation modes. The controller controls the gear changing device within the gear changing range that is selected. The controller also controls the gear changing device according to a detection result of the traveling state detecting unit.