Bicycle Motorization Device Speed and Pedal Force Control
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Solution Overview
Problem
Conventional electric bicycles without an electric motor lack the capability for motorization, as they do not have the necessary components to provide auxiliary driving force.
Innovation Solution
A bicycle motorization device and wheel that include a calculation unit to determine speed, an estimation unit to estimate pedal force, an electric motor, and a control unit to apply auxiliary driving force based on calculated speed and estimated pedal force, utilizing a battery to power the electric motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an electric motor is added to a conventional bicycle, then auxiliary driving force is provided, but device complexity increases
Solution Approach 1:
The patent combines the electric motor, battery, control unit, calculation unit, and estimation unit into an integrated motorization device that attaches to the bicycle. This merging of multiple components into a unified system provides auxiliary driving force while managing overall device complexity through integrated design.
Solution Approach 2:
The motorization device performs multiple functions: the calculation unit calculates bicycle speed, the estimation unit estimates pedal force, the control unit manages motor output, and the electric motor provides auxiliary driving force. This multi-functionality allows a single device to address various operational requirements without requiring separate specialized components for each function.
2Ease of operation
If speed calculation and pedal force estimation are implemented, then auxiliary driving force application is optimized, but device complexity increases
Solution Approach 1:
The system performs self-service by automatically calculating bicycle speed and estimating pedal force without requiring external input or manual adjustment. The calculation unit and estimation unit continuously monitor system parameters and autonomously determine the appropriate auxiliary driving force, making the device easy to operate while the complexity is contained within the automated subsystems.
Solution Approach 2:
The control unit receives feedback from the calculation unit (bicycle speed) and estimation unit (pedal force) to continuously adjust the motor output. This feedback mechanism ensures optimized auxiliary driving force application based on real-time conditions, improving ease of operation while the feedback processing is handled automatically by the control system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the motorization of bicycles without an electric motor by providing an electric motor assist function, enhancing the riding experience by adding auxiliary driving force.
Implementation Method 1
a battery which supplies electric power to the electric motor
Implementation Method 2
an electric motor; a control unit configured to apply auxiliary driving force to a wheel of the bicycle by driving the electric motor
Data Source
AI summary
A bicycle motorization device is attached to a bicycle. The motorization device includes: a calculation unit configured to calculate speed of the bicycle; an estimation unit configured to estimate pedal force applied to pedals of the bicycle; an electric motor; a battery which supplies electric power to the electric motor; and a control unit configured to apply auxiliary driving force to a wheel of the bicycle by driving the electric motor based on the speed calculated and the pedal force estimated.