E-bike Controller Torque Responsivity by Pedaling Posture
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Solution Overview
Problem
Existing human-powered vehicle control devices require operation of a switch to change motor output performance, limiting adaptability to different pedaling postures and driving forces.
Innovation Solution
An electronic controller is used to adjust the responsivity of the motor's output torque based on the rider's pedaling posture, allowing for changes in motor performance without switch operation, optimizing torque response and delay according to standing or seated pedaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switch is used to change motor output performance, then the motor can be controlled to different output levels, but the system requires manual operation and cannot automatically adapt to different pedaling postures
Solution Approach 1:
The system automatically detects the rider's pedaling posture using sensors and autonomously adjusts motor output performance without requiring manual switch operation. The control device serves itself by monitoring rider state and making appropriate control decisions, eliminating the need for user intervention.
Solution Approach 2:
The system uses sensors to detect pedaling posture and provides feedback to the control device, which then adjusts motor output accordingly. This closed-loop feedback mechanism enables automatic adaptation to different riding conditions without manual input from the user.
2Adaptability or versatility
If the motor output is constantly adjusted to match pedaling posture, then the system becomes highly adaptive, but the control system complexity increases
Solution Approach 1:
The patent replaces complex mechanical control systems with electronic sensing and control. By using sensors to detect pedaling posture and electronic controllers to adjust motor output, the system achieves high adaptability through software-based control rather than mechanical complexity.
Solution Approach 2:
The control device performs multiple functions: it monitors pedaling posture, determines rider state (standing or seated), and adjusts motor output performance. This multi-functional approach consolidates what could be separate complex systems into a single integrated control unit.
3Speed
If the motor responds quickly to changes in human driving force, then the rider experiences smooth assistance, but the motor may overreact to transient force variations
Solution Approach 1:
The system dynamically adjusts motor output based on detected pedaling posture and rider state. By changing control parameters according to whether the rider is standing or seated, the system optimizes response characteristics to match the mechanical dynamics of different pedaling modes, achieving both responsiveness and stability.
Data Source
AI summary
A human-powered vehicle control device includes an electronic controller operatively coupled to a motor that assists in propulsion of a human-powered vehicle. The controller is configured to control the motor in accordance with a human driving force that is input to the human-powered vehicle and is configured to change responsivity of an output torque of the motor to a change in the human driving force in accordance with a rider's pedaling posture of a rider of the human-powered vehicle. The human-powered vehicle control device is configured to change an output performance of the motor without operation of a switch.