E-Bike Drive Unit Replacement Using Remote Configuration Data
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Solution Overview
Problem
Drive units of electric bicycles often require costly and time-consuming replacement by manufacturers due to legal restrictions, preventing user or conventional workshops from performing repairs or replacements.
Innovation Solution
A method involving capturing identification features of a first drive unit, transmitting them to a second service device, generating configuration data based on these features, and using those data to configure a second drive unit at a first service device, ensuring secure and efficient replacement without physical transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drive unit replacement is performed by manufacturer or certified workshop only, then security against manipulation is improved, but replacement time and cost increase
Solution Approach 1:
The replacement process is segmented into two independent parts: physical replacement (can be done by any service device) and configuration (performed by authorized second service device). This segmentation allows the majority of the replacement process to be performed locally without time loss, while security is maintained through the separate configuration step.
Solution Approach 2:
Configuration data act as an intermediary that bridges the physical drive unit and the vehicle control system. The second service device generates this intermediary configuration data that enables the first service device to complete the replacement without having full authorization, thus resolving the time-security contradiction.
2Reliability
If drive unit replacement is performed by manufacturer or certified workshop only, then security against manipulation is improved, but replacement cost increases
Solution Approach 1:
The service authorization is segmented such that only the configuration generation requires authorized personnel (second service device), while the physical replacement and basic configuration can be performed by any service device. This reduces the cost burden to only the essential security-critical step.
Solution Approach 2:
The first service device creates a functional copy of the drive unit's operation by using configuration data generated from the original drive unit's identification features. This copying approach allows unauthorized devices to perform replacements at lower cost while maintaining system integrity through centralized configuration control.
3Ease of operation
If configuration data are generated by first service device, then replacement simplicity is improved, but security against manipulation deteriorates
Solution Approach 1:
The configuration data serve as an intermediary that is generated by the authorized second service device but then transmitted to and used by the first service device. This intermediary mechanism allows the first service device to perform simple operations without having direct authorization, thus maintaining both simplicity and security.
4Reliability
If physical transport of drive unit to manufacturer is required, then security against manipulation is improved, but replacement time and cost increase
Solution Approach 1:
The mechanical process of physically transporting the drive unit to the manufacturer is replaced with an electronic data transmission system. The identification features and configuration data are transmitted electronically between service devices, eliminating the need for physical transport while maintaining security through cryptographic protection of the data.
Data Source
AI summary
A method for replacing a drive unit of a vehicle, in particular of an electric bicycle, includes (i) capturing identification features of a first drive unit of a vehicle by way of a first service device, wherein the identification features uniquely represent the first drive unit, (ii) transmitting the identification features from the first service device to a second service device, (iii) generating configuration data by way of the second service device on the basis of the identification characteristics, (iv) transmitting the configuration data from the second service device to the first service device, (v) providing a second drive unit at the first service device, and (vi) configuring the second drive unit by way of the first service device using the configuration data.