ECU Diagnostic Data Transmission Priority Control
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Solution Overview
Problem
Conventional electronic control units in vehicles transmit diagnostic data at preset intervals, leading to increased communication channel load and wasteful data transmission, flooding external devices with unnecessary data.
Innovation Solution
An electronic control unit equipped with an input section, transmission data generator, and priority setter that adjusts data transmission based on priority settings, reducing data transmission amount and preventing unnecessary data from being sent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If diagnostic data is transmitted at preset intervals with increased data communication amount, then more precise failure analysis is enabled, but communication channel load increases and wasteful data is transmitted
Solution Approach 1:
The patent extracts only the necessary diagnostic data for failure analysis by introducing a priority setting mechanism. The priority setter identifies and selects high-priority data items that are actually needed for diagnosing vehicle failures, excluding wasteful low-priority data from transmission. This extraction principle resolves the contradiction by transmitting only essential data at preset intervals, maintaining analysis precision while reducing communication load.
Solution Approach 2:
The patent applies local quality by assigning different priority levels to different data items based on their diagnostic value. High-priority data items related to critical failure modes are transmitted frequently, while low-priority items are transmitted less frequently or excluded. This differentiated approach ensures that communication resources are allocated efficiently to data that actually contributes to failure analysis precision.
2Quantity of substance
If all diagnostic data is transmitted to external device, then complete data availability for analysis is achieved, but external device is flooded with unnecessary data
Solution Approach 1:
The priority setter extracts and identifies high-priority diagnostic data items from the complete set of available data. By selecting only those data items with high diagnostic value, the system ensures sufficient data availability for failure analysis while excluding wasteful low-priority data, thus preventing external device flooding.
Solution Approach 2:
Instead of transmitting all available diagnostic data (excessive action), the patent transmits only a partial subset of high-priority data items. This partial transmission approach provides sufficient information for effective failure analysis without the harm of flooding the external device with unnecessary data.
3Reliability
If data transmission amount is increased for better diagnostics, then diagnostic capability is improved, but transmission bandwidth is consumed
Solution Approach 1:
The priority setter extracts high-priority diagnostic data items that contribute most to diagnostic capability. By transmitting only these essential data items rather than all available data, the system maintains reliable diagnostic capability while minimizing data transmission amount and bandwidth consumption.
Solution Approach 2:
The patent assigns different transmission priorities to different data items based on their diagnostic importance. Critical data items related to safety and major failures are transmitted with higher frequency and priority, while less critical items are transmitted less frequently. This localized quality differentiation maintains diagnostic reliability while optimizing bandwidth usage.
Data Source
AI summary
An electronic control unit (ECU) is disposed in a vehicle, and includes an input section and a controller. The input section inputs vehicle data from vehicle sensors and actuator to the controller. The controller includes a priority setter and a transmission data generator. The transmission data generator transmits transmission object data, which is data for transmission to an external device and generated from the vehicle data. The priority setter sets priority of the transmission object data based on priority setting data, which is data included in the vehicle data. The transmission data generator performs an adjustment process for adjusting an amount of transmission data based on the priority. The ECU provides an efficient transmission of data by limiting and/or preventing an increase in the amount of transmission data.