Vehicle ECU Dynamic Threshold for Road Condition Data Storage
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Solution Overview
Problem
Existing vehicle diagnostic systems fail to appropriately store operation data when a vehicle exhibits behaviors that do not correspond to the driver's operation, leading to incorrect storage of uncomfortable vehicle behaviors and memory overflow due to fixed threshold conditions that do not account for varying road conditions.
Innovation Solution
An electronic control unit with a threshold acquiring element, behavior determining element, and storing element that dynamically sets thresholds based on road conditions, ensuring that operation data is stored only when the vehicle behavior meets the determination condition specific to the current road scenario, thereby reducing incorrect storage and memory overflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed threshold is used to define the determination condition, then the device complexity is reduced, but the reliability of storing appropriate operation data decreases due to road condition variations
Solution Approach 1:
The threshold is changed from a fixed value to a dynamic value that varies according to road conditions. The ECU acquires road condition information and adjusts the threshold accordingly, allowing the determination condition to adapt to different driving scenarios such as straight roads, curved roads, and parking areas, thereby improving storage accuracy without excessive complexity
Solution Approach 2:
The threshold parameter is modified based on road condition parameters. By changing the threshold value according to the acquired road condition (e.g., curve radius, road gradient), the system optimizes the determination condition for each specific scenario, ensuring that operation data causing driver discomfort is accurately identified and stored
2Quantity of substance
If the determination condition is set to capture all vehicle behaviors, then the quantity of stored operation data increases, but the memory capacity is exceeded causing loss of important data
Solution Approach 1:
Different threshold values are applied to different road condition scenarios. Instead of using a uniform threshold for all conditions, the system applies locally optimized thresholds specific to each road type (straight, curved, parking), ensuring that only relevant operation data is stored in each context, thus preventing memory overflow while retaining critical information
Solution Approach 2:
The threshold dynamically adjusts based on road conditions to optimize the quantity of stored data. By becoming more or less sensitive to vehicle behavior deviations depending on the road context, the system captures only the most significant operation data, preventing unnecessary storage that would lead to memory capacity exhaustion
3Reliability
If the determination condition is set to be highly sensitive, then the reliability of detecting uncomfortable vehicle behavior improves, but the quantity of stored operation data increases causing memory overflow
Solution Approach 1:
The sensitivity of the determination condition is locally optimized for each road condition. In scenarios where driver discomfort is more likely (e.g., curved roads, parking), the threshold is set to be more sensitive, while in normal driving conditions, it is less sensitive, thus achieving high detection accuracy without excessive data storage
Solution Approach 2:
The threshold parameter is changed according to road condition to control detection sensitivity. By adjusting the threshold value, the system achieves high sensitivity when needed (improving detection reliability) while maintaining lower sensitivity in other conditions (reducing data quantity), thereby balancing detection accuracy with memory management
Data Source
AI summary
An electronic control unit includes a threshold acquiring element, a behavior determining element and a storing element. The threshold acquiring element acquires a threshold for defining a determination condition. The threshold is set to correspond to a road condition on which a vehicle travels. The behavior determining element determines whether a vehicle behavior satisfies the determination condition defined by the threshold. The storing element stores predetermined operation data of the vehicle when the behavior determining element determines that the vehicle behavior satisfies the determination condition.