Meter Drawer State Retention During Vehicle Stop-Start Sequences
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Solution Overview
Problem
In integrated vehicular apparatuses, the ending sequence for stopping the vehicle may be interrupted by a subsequent starting sequence, leading to delayed or incomplete displays, particularly affecting safety-critical information like speed and warning lights, due to programs terminating before the ending sequence is completed.
Innovation Solution
The vehicular apparatus incorporates a maintainer that maintains the operating state of the meter drawer until predetermined conditions are met, ensuring the completion of the ending sequence and preventing faults in display devices by continuing the necessary drawings during the stopping operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ending sequence is started when ignition is turned off, then the vehicle stopping process is initiated, but the sequence may be interrupted by a subsequent starting sequence causing delayed or incomplete displays
Solution Approach 1:
The system performs preliminary actions by saving the current drawer execution state to storage before starting the ending sequence, and restores this state if the vehicle is restarted before the ending sequence completes. This ensures that critical display operations are not lost due to interruption.
Solution Approach 2:
The maintainer component continuously monitors whether the vehicle has been restarted during the ending sequence and maintains the drawer execution state accordingly. This continuity mechanism ensures that display operations continue uninterrupted even after system restart, preventing display delays and information loss.
2Productivity
If programs are terminated sequentially during the ending sequence, then system resources are freed, but critical display information may not be rendered before termination
Solution Approach 1:
Before terminating programs during the ending sequence, the system performs a preliminary save of the drawer execution state. This ensures that even if programs are terminated early, the display information can be restored and completed in a subsequent execution, preventing information loss.
Solution Approach 2:
The storage device acts as an intermediary, storing the drawer execution state between the ending sequence initiation and potential system restart. This intermediary storage mechanism preserves critical display information that would otherwise be lost during program termination.
3Adaptability or versatility
If the vehicle is restarted before the ending sequence completes, then the starting sequence begins, but the ending sequence programs remain unfinished causing display faults
Solution Approach 1:
The system implements feedback by monitoring whether the vehicle restart occurs during an active ending sequence. When a restart is detected, the system checks the saved drawer execution state and determines whether to resume or complete the ending sequence, ensuring display correctness while maintaining system responsiveness.
Solution Approach 2:
The system dynamically adjusts its behavior based on the operational state. When restarted during an ending sequence, the system transitions from a clean startup to a resumption mode, loading the saved drawer execution state and continuing the ending sequence to ensure display correctness.
Data Source
AI summary
A vehicular includes a drawer, an input device and a maintainer. The drawer executes drawing on a display device. The input device receives a signal indicating an operation for stopping a vehicle. The maintainer maintains the drawer at an operating state during a period until the drawing on the display device is not required, in response to that the input device receives the signal indicating the operation for stopping the vehicle.