Vehicle Control Unit Restart Delay for Accurate Diagnostics
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Solution Overview
Problem
Conventional vehicle control systems may erroneously determine a device as faulty due to incorrect diagnostic results when a driver switches the ignition key from OFF to ON during the diagnostic process, causing the system to restart prematurely and leading to inaccurate fault determinations.
Innovation Solution
A vehicle control unit that includes a receiving part and a controller to manage the startup and shutdown of electronic devices based on driver operations, ensuring that startup occurs only after a predetermined time has elapsed since the OFF operation, allowing completion of diagnostic processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the control device immediately restarts the vehicle upon receiving an ON operation, then the response speed to driver input is improved, but the diagnostic accuracy deteriorates due to premature restart interrupting the diagnostic process
Solution Approach 1:
The control device performs preliminary actions by storing diagnostic results in storage memory before the diagnostic process is complete, and by implementing a predetermined time delay mechanism. This preliminary action ensures that diagnostic data is preserved even if the driver prematurely activates the ignition switch, preventing erroneous fault determinations while maintaining responsive vehicle operation.
2Measurement precision
If the control device waits for a predetermined time before restarting, then the diagnostic accuracy is improved by completing the diagnostic process, but the response time to driver input increases
Solution Approach 1:
The control device performs preliminary actions by storing diagnostic results in storage memory before the diagnostic process is complete, and by implementing a predetermined time delay mechanism. This preliminary action ensures that diagnostic data is preserved even if the driver prematurely activates the ignition switch, preventing erroneous fault determinations while maintaining responsive vehicle operation.
Solution Approach 2:
The control device introduces an intermediary time delay mechanism between the OFF operation and the subsequent ON operation. This intermediary period allows the diagnostic process to complete while providing a buffer that prevents premature restarts from corrupting diagnostic results, thus balancing diagnostic accuracy with operational responsiveness.
3Productivity
If the vehicle restarts during the diagnostic process, then the operational efficiency is improved by quick restart, but the reliability of fault detection deteriorates due to incorrect diagnostic results
Solution Approach 1:
The control device performs preliminary actions by storing diagnostic results in storage memory before the diagnostic process is complete, and by implementing a predetermined time delay mechanism. This preliminary action ensures that diagnostic data is preserved even if the driver prematurely activates the ignition switch, preventing erroneous fault determinations while maintaining responsive vehicle operation.
Solution Approach 2:
The control device introduces an intermediary time delay mechanism between the OFF operation and the subsequent ON operation. This intermediary period allows the diagnostic process to complete while providing a buffer that prevents premature restarts from corrupting diagnostic results, thus balancing diagnostic accuracy with operational responsiveness.
Data Source
AI summary
A vehicle control unit includes a receiving part that receives an ON operation for causing an electronic device included in a vehicle to start up and an OFF operation for causing the activated electronic device to shut down, and a controller that controls startup of the electronic device or shutdown of the electronic device based on an operation received by the receiving part, wherein when the receiving part receives the ON operation before a predetermined time elapses after the receiving part receives the OFF operation, the controller causes the electronic device to initiate startup after the predetermined time has elapsed since the receiving part received the OFF operation.