Odometer Mileage Backup Control for Tamper-Resistant ECU Replacement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control systems face challenges in preventing falsification of total travel distance data accumulated by an odometer and ensuring efficient inheritance of this data when the odometer is replaced.
Innovation Solution
A vehicle control system that includes a meter-side control device and a backup device, utilizing an authentication signal with a common key for data communication. When a new common key is registered, the larger value of total travel distance from both devices is inherited, thereby preventing falsification and enabling quick data inheritance during odometer replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the total travel distance is accumulated and stored in the meter ECU, then the odometer function is achieved, but the data may be falsified or lost when the ECU is replaced
Solution Approach 1:
The backup ECU continuously accumulates and stores the total travel distance data in advance, maintaining a backup copy independent of the meter ECU. This preliminary action ensures that when the meter ECU is replaced, the authentic total travel distance data is already available in the backup ECU, preventing both falsification and data loss without requiring complex verification systems.
2Ease of operation
If the total travel distance data is transferred during ECU replacement, then inheritance is achieved, but the process time increases
Solution Approach 1:
The backup ECU continuously accumulates total travel distance data during normal operation, so when ECU replacement is needed, the data is already prepared and available for immediate transfer. This eliminates the need for time-consuming data retrieval or calculation during replacement, reducing downtime while maintaining operational simplicity.
Solution Approach 2:
The system creates a backup copy of the total travel distance data in the backup ECU during normal operation. When replacement is needed, this pre-existing copy can be quickly transferred to the new meter ECU without requiring complex procedures or extended time, thus simplifying the replacement process while minimizing time loss.
3Reliability
If majority vote method is used to specify total travel distance, then data consistency is achieved, but falsification cannot be reliably prevented
Solution Approach 1:
The backup ECU acts as an intermediary that independently accumulates and preserves the authentic total travel distance data. When the meter ECU is replaced or data authenticity is questioned, the backup ECU serves as a trusted mediator providing the genuine data, eliminating the need for majority voting while reliably preventing falsification through this independent verification source.
Data Source
AI summary
The vehicle control system of the present disclosure includes a meter-side control device that is installed in a vehicle and can measure the total distance traveled by the vehicle, and a backup device that can obtain a copy of the total distance measured by the meter-side control device. Data communication between the meter-side control device and the backup device uses an authentication signal using a common key, and a new communication between the meter-side control device and the backup device When registering a common key, the larger value of the total mileage value stored in the meter side control device and the total mileage value stored in the backup device is sent to the meter side control device. Total mileage.