Engine Oil Quality Monitoring With Adaptive Sampling Intervals
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Solution Overview
Problem
Current methods for monitoring engine oil quality in combustion engines are either labor-intensive and costly or provide inaccurate results due to frequent sampling and complex analysis, or rely on sensors that are influenced by operating parameters and prone to inaccuracies.
Innovation Solution
A method that uses sensors to continuously monitor engine oil quality, adapting the oil sampling interval based on measured numerical values and variables, allowing for more efficient and resource-saving lubricant management by optimizing when laboratory analysis is necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If oil samples are taken frequently and analyzed in a laboratory, then oil quality monitoring accuracy is improved, but monitoring costs and operational complexity increase
Solution Approach 1:
The patent replaces complex mechanical laboratory analysis systems with an electronic sensor-based monitoring system. Sensors continuously measure oil quality parameters (such as viscosity, temperature, and contamination levels) and transmit data to a control unit, eliminating the need for frequent manual sampling and laboratory analysis while maintaining monitoring accuracy.
Solution Approach 2:
The patent implements continuous oil quality monitoring through sensors that operate throughout the engine's operational cycle. Instead of discrete periodic sampling, the sensor system continuously tracks oil degradation parameters, providing real-time data to the control unit for immediate assessment and alert generation.
2Productivity
If sensors are used to monitor oil quality, then monitoring frequency is improved, but measurement accuracy deteriorates due to influence from operating parameters
Solution Approach 1:
The control unit receives continuous feedback from sensors monitoring oil quality parameters and engine operating conditions. Based on this feedback, the system dynamically adjusts monitoring strategies, compares measured values against predefined thresholds, and generates alerts only when actual oil degradation is detected, filtering out false positives caused by normal operating parameter variations.
Solution Approach 2:
The patent compensates for sensor measurement inaccuracies caused by operating parameter changes by continuously adjusting reference values and thresholds based on real-time engine conditions. The control unit modifies monitoring criteria dynamically to account for temperature, load, and speed variations, ensuring accurate oil quality assessment despite changing operating conditions.
3Ease of operation
If fixed oil sampling intervals are used, then operational simplicity is improved, but resource efficiency deteriorates due to unnecessary sampling
Solution Approach 1:
The patent transitions from static fixed sampling intervals to dynamic adaptive monitoring intervals. The control unit continuously evaluates oil quality data from sensors and automatically adjusts the monitoring frequency based on actual oil degradation rates. When oil quality remains stable, monitoring frequency is reduced; when degradation accelerates, monitoring intensity increases, optimizing resource usage while maintaining detection effectiveness.
4Loss of energy
If continuous sensor monitoring is implemented, then operational costs are reduced, but initial system complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes sensor data, compares measurements against dynamic thresholds, determines oil quality status, triggers alerts, and adjusts monitoring intervals. This multi-functional approach consolidates what could be separate complex systems into a single integrated unit, reducing overall system complexity while maintaining continuous monitoring capabilities and cost efficiency.
Data Source
AI summary
Method for monitoring a lubricant of a combustion engine, wherein measured numerical values are acquired with at least one sensor over a running time of a combustion engine, wherein the measured numerical values are representative of an oil quality of an engine oil of the combustion engine, wherein an oil sampling interval is adapted depending on at least one measured numerical value and/or a variable derived therefrom.