Vehicle Master Device Installation Condition Determination
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Solution Overview
Problem
Existing vehicle master devices lack a systematic approach to ensure proper installation of program updates in electronic control units (ECUs), potentially leading to incomplete or failed installations, which can cause operational issues during vehicle use.
Innovation Solution
A vehicle master device is configured to acquire update data and instruct ECUs to install it only when specific conditions are met, including user approval, data communication availability, vehicle and ECU readiness, and normal data integrity, ensuring a controlled and successful installation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle master device distributes update data to ECUs without systematic condition checking, then the installation process is faster and simpler, but the reliability of the installation fails due to incomplete or failed installations
Solution Approach 1:
The system performs preliminary condition checks before initiating the update installation process. The installation condition determination unit evaluates multiple conditions (user approval, data communication availability, vehicle and ECU readiness, data integrity) in advance to ensure all prerequisites are met before distribution begins, preventing failed installations.
Solution Approach 2:
The system implements a feedback mechanism where the installation condition determination unit continuously monitors and evaluates the status of multiple conditions during the update process. Based on the evaluation results, the system adjusts its behavior - either proceeding with distribution when conditions are satisfied or halting when they are not, thereby ensuring reliable installation.
2Reliability
If the system checks all installation conditions before distributing update data, then the installation success rate improves, but the time required for the update process increases
Solution Approach 1:
The system performs condition evaluation in advance before the actual data distribution begins. By checking all necessary conditions (user approval, communication availability, system readiness, data integrity) beforehand, the system ensures that once distribution starts, it can proceed without interruptions or failures, thus minimizing total update time while maintaining high success rates.
3Reliability
If the vehicle master device acquires and validates update data before distribution, then the data integrity is ensured, but the complexity of the data validation process increases
Solution Approach 1:
The system performs data validation and integrity checks in advance before distributing update data to ECUs. The installation condition determination unit verifies data normality and integrity as part of the preliminary condition evaluation, ensuring that only valid data is distributed, thereby maintaining high data integrity without requiring complex validation mechanisms during the distribution phase.
Data Source
AI summary
A vehicle master device includes an installation condition determination unit that is configured to determine whether all of a first condition that a user's approval for the installation has been obtained, a second condition that data communication with a center device is available, a third condition that a vehicle condition is an installable condition, a fourth condition that a rewrite target ECU is in an installable condition, and a fifth condition that the update data is normal data are satisfied. The device further includes an installation instruction unit that is configured to instruct the rewrite target ECU to perform installation using the update data when the installation condition determination unit determines that all of the first condition, the second condition, the third condition, the fourth condition, and the fifth condition are satisfied.