E-Bike Drive Overrun Control for Irregular Pedaling
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Solution Overview
Problem
Existing electric bicycle drive systems struggle to adjust overrun time effectively in response to irregular pedaling, leading to uncomfortable or uncontrollable propulsion during varying driving conditions.
Innovation Solution
A control method that adjusts the overrun time based on sensor data, including pedaling torque, cadence, and environmental factors, to compensate for irregular pedaling and enhance rider comfort by optimizing propulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drive unit is actuated to follow a moving object, then the moving object can be tracked and controlled, but communication interruptions or delays cause incorrect positioning and reduced system reliability
Solution Approach 1:
The system determines the position of the moving object in advance before actual drive unit actuation is needed. This preliminary position determination is stored and used as a fallback when real-time communication fails, allowing the drive unit to continue operating with previously determined position data rather than stopping or operating with incorrect information.
Solution Approach 2:
The system continuously monitors communication status between the control unit and drive unit. When communication interruptions or delays are detected, the system automatically switches to using stored preliminary position data. This feedback mechanism ensures the system adapts to communication conditions and maintains reliable operation by selecting the appropriate data source in real-time.
2Measurement precision
If the control unit waits for position data from the moving object, then positioning accuracy can be maintained, but communication delays cause incorrect positioning and reduced productivity
Solution Approach 1:
Position data is determined and stored in advance before it would be needed for drive unit actuation. This preliminary determination ensures that accurate position information is already available when communication delays occur, eliminating the need to wait for real-time data transmission while maintaining positioning accuracy.
Solution Approach 2:
The system dynamically selects between real-time position data and stored preliminary position data based on current communication conditions. When communication is reliable, the system uses real-time data for maximum accuracy. When communication delays are detected, the system automatically switches to preliminary data, maintaining both accuracy and productivity by adapting to changing conditions.
3Reliability
If the system uses real-time position data from the moving object, then positioning accuracy is maintained, but communication interruptions cause incorrect positioning and reduced reliability
Solution Approach 1:
The system prepares preliminary position data in advance as a protective measure against future communication interruptions. This cushioning approach ensures that when communication failures occur, the system already has backup position information available, preventing incorrect positioning and maintaining reliability without needing to react to the interruption itself.
Solution Approach 2:
The system continuously monitors communication status and automatically switches between real-time position data and preliminary position data based on detected interruptions or delays. This feedback mechanism protects the system from communication harmful factors by detecting problems and adapting the data source selection to maintain reliable operation.
Data Source
Figure 1~2
AI summary
The invention relates to a method for actuating the drive of an at least partly pedal-operated vehicle, for example an electric bicycle, to a controller which carries out said method, and to a vehicle which is operated using said controller or said method. The actuation of the pedals by the operator is first detected in that corresponding sensor variables are captured. On the basis of the sensor variable which thus represents the actuation of the pedals, the drive of the vehicle is actuated and/or controlled, for example on the basis of the detected pedal torque or the pedal frequency. In order to increase the ride comfort for the operator, the drive is actuated for a short follow-up time beyond the actuation of the pedals in order to compensate for short interruptions in the peddling activity or for an irregular strength of the peddling force during a circulation of the crankset if necessary. The invention is characterized in that the follow-up time during which the actuation of the drive is maintained is adapted according to the previous actuation of the pedals by the operator. For this purpose, the sensor variable is detected for a period of time in order to derive a dynamic variable therefrom, by means of which the follow-up time is then adapted.