Motor Vehicle Diagnostic System Parameter Progression Analysis
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Solution Overview
Problem
Conventional diagnostic methods for motor vehicles generate excessive data volumes and often result in faulty diagnoses due to interactions between system parameters, making it difficult to achieve a reliable and cost-effective diagnosis that corresponds to the driver's intent.
Innovation Solution
A method that determines system parameter progressions over a specified time period, compares them to reference progressions within defined tolerances, and identifies operating situation similarities to accurately diagnose system errors, reducing unnecessary data volume and computation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple system parameters are continuously monitored over time, then measurement precision and reliability of diagnosis is improved, but data volume increases excessively and computation time increases
Solution Approach 1:
The patent segments the continuous monitoring process into discrete evaluation intervals. Instead of continuously analyzing all system parameters, the diagnostic device divides time into intervals and only evaluates parameters at specific evaluation points within each interval. This segmentation reduces the total data volume processed while maintaining diagnostic reliability by focusing on critical moments when parameter changes are most informative.
Solution Approach 2:
The patent extracts only the essential information needed for diagnosis by comparing system parameters against reference values at specific evaluation points, rather than processing all continuous data. The diagnostic device identifies and extracts only those parameter deviations that exceed predefined thresholds, discarding redundant data that does not contribute to diagnosis accuracy.
2Adaptability or versatility
If multiple system parameters are monitored simultaneously, then comprehensive system coverage is improved, but device complexity and computation time increase
Solution Approach 1:
The patent implements dynamic parameter selection where the diagnostic device adaptively determines which system parameters to monitor based on current operating conditions. Instead of continuously monitoring all parameters simultaneously, the system dynamically adjusts the set of active parameters to be evaluated, reducing computational complexity while maintaining comprehensive system coverage when needed.
Solution Approach 2:
The patent changes the evaluation parameters based on operating conditions by using different reference values and tolerance thresholds for different system states. The diagnostic device adjusts which parameters are critical for evaluation depending on the current operating mode, thereby reducing the effective number of parameters that need complex simultaneous processing while maintaining versatility.
3Reliability
If continuous monitoring of system parameters is performed, then diagnosis reliability is improved, but loss of time for processing and false diagnoses increase
Solution Approach 1:
The patent implements periodic evaluation where the diagnostic device assesses system parameters at regularly spaced evaluation intervals rather than continuously. This periodic approach maintains diagnosis reliability by checking parameters at sufficient frequency while dramatically reducing processing time by allowing the system to operate without active diagnostic processing between evaluation points.
Solution Approach 2:
The patent skips detailed analysis of parameter deviations that fall within predefined tolerance ranges. When system parameters remain within acceptable limits, the diagnostic device quickly skips detailed processing and moves to the next evaluation point, reducing processing time. Only when deviations exceed thresholds does the system perform comprehensive analysis, rushing through normal conditions and focusing computational resources on abnormal states.
Data Source
AI summary
The invention relates to a method for providing a diagnosis of at least one technical system (1) of a motor vehicle (2). The invention further relates to a diagnostic system (10) and a motor vehicle (2).