E-Bike Driving State Switching With External Mode Notification
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Solution Overview
Problem
Existing vehicles, such as electric bicycles, face challenges in seamlessly transitioning between human-powered and motor-powered modes, leading to inappropriate driving states based on the rider, vehicle, or environmental conditions.
Innovation Solution
A vehicle design that includes an input unit for rider force, a wheel for force transmission, and an electric motor, allowing switching between human-powered and motor-powered states, with a notification method to indicate the driving state to the outside environment through distinct notifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vehicle switches between human-powered and motor-powered modes, then the adaptability to different riding conditions is improved, but the device complexity increases due to the need for switching mechanisms and control systems
Solution Approach 1:
The vehicle implements dynamic switching between first driving state (human-powered) and second driving state (motor-powered) based on detected riding conditions. The control unit dynamically adjusts the driving mode by receiving input from detection units that monitor rider state, vehicle state, and travel environment, enabling the system to adapt to varying conditions without fixed configuration.
2Reliability
If the vehicle provides clear notifications of driving state, then the safety and awareness are improved, but the device complexity increases due to additional notification components
Solution Approach 1:
The notification unit serves as an intermediary that communicates the current driving state to the surrounding environment. It receives driving state information from the control unit and translates it into perceptible signals (visual, auditory, or tactile) that inform other road users or observers about the vehicle's operational mode, enhancing safety without requiring complex direct control mechanisms.
3Measurement precision
If the vehicle uses multiple detection units to gather comprehensive information, then the accuracy of driving state selection is improved, but the device complexity and cost increase
Solution Approach 1:
The detection units are designed to serve multiple functions: detecting rider state (e.g., pedaling force, posture), vehicle state (e.g., speed, acceleration), and travel environment (e.g., road conditions, traffic). This multi-functional approach allows comprehensive monitoring with a integrated detection system rather than separate specialized sensors for each parameter, reducing overall complexity while maintaining detection accuracy.
Data Source
AI summary
An electric bicycle (10), which is a vehicle including a crank pedal (79) which receives an input from a leg of a rider, a rear wheel (78) to which power input to the crank pedal (79) is transmitted, and a motor (M) which outputs power to be transmitted to the rear wheel (78), is switchable between an EAB driving state as a first driving state in which the rear wheel (78) is driven by at least the power input to the crank pedal (79), and an EV driving state as a second driving state in which the rear wheel (78) is driven by the power of the motor (M) alone.