Vehicle Fault Analysis Using Buffered In-Vehicle Data
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Solution Overview
Problem
Existing fault analysis methods in vehicles transmit both current and past faults, lacking data availability at the time of fault occurrence, and provide limited data for accurate fault determination.
Innovation Solution
A method involving a vehicle's bus system and transmission control unit to selectively transmit in-vehicle data to an external computing unit during a defined period, using mobile radio networks, with data forwarding within a short time frame, and incorporating voice connections for fault pattern description.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If fault data from past journeys are transmitted along with current faults, then the quantity of data for fault analysis is increased, but the availability of contextual data at the time of fault occurrence is lost
Solution Approach 1:
The system performs preliminary actions by continuously storing in-vehicle data in a buffer memory during normal operation before a fault occurs. This ensures that when a fault happens, the relevant contextual data is already prepared and immediately available for transmission, eliminating the need to rely on previously transmitted fault data from past journeys.
Solution Approach 2:
A buffer memory acts as an intermediary between the fault detection system and the data transmission system. It temporarily holds in-vehicle data locally, allowing the system to transmit only the necessary contextual data associated with the current fault occurrence, rather than transmitting all historical fault data.
2Reliability
If all in-vehicle data are transmitted to external computing units, then the completeness of fault analysis data is improved, but the data transmission time and energy consumption increase
Solution Approach 1:
The system extracts only the specific in-vehicle data that are relevant to the current fault occurrence from the complete set of in-vehicle data. By identifying and transmitting only the necessary subset of data associated with the fault event, the system maintains data completeness for fault analysis while significantly reducing transmission time and energy consumption.
Solution Approach 2:
Instead of transmitting all in-vehicle data (excessive action), the system transmits only the partial set of data that is sufficient for fault analysis. This partial action approach ensures that the transmission is efficient and timely while still providing complete information needed for diagnosing the fault.
3Ease of operation
If fault analysis is performed only with transmitted fault data, then the simplicity of the analysis process is maintained, but the accuracy of fault determination is reduced
Solution Approach 1:
The system merges fault data from the fault memory with relevant in-vehicle data from the buffer memory to perform a comprehensive fault analysis. By combining these two data sources, the system maintains the simplicity of the analysis process while significantly improving the accuracy of fault determination through access to complete contextual information.
Data Source
AI summary
A method of simplifying and/or improving a fault analysis in a vehicle may include, in a transmission period starting with establishment of a data connection and ending with the interruption of the data connection, when the ignition of the vehicle is active and/or when the vehicle is moving, transmitting the in-vehicle data as transmission data to the transmission control unit in addition to a transmission of the in-vehicle data between at least two components. In addition, the transmission data arriving at the transmission control unit are forwarded to the external computing unit via the data connection. In addition, a description of a fault pattern present in the vehicle and fault data from a fault memory of the vehicle are transmitted to the external computing unit. On the basis of the fault pattern, the transmission data forwarded to the external computing unit and the fault data, a fault analysis is carried out during the existence of the data connection and/or within a period after the existence of the data connection.