Oil Pump Thermal Load Estimation Using Viscosity Thresholds
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Solution Overview
Problem
Existing methods fail to provide an easy way to estimate the thermal load of an oil pump, which is difficult due to the generation of heat during operation.
Innovation Solution
A method that counts the number of activations of the oil pump when the oil viscosity or temperature exceeds a threshold, estimating thermal load based on this count, using a processor to record and calculate thermal load accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oil pump operates to maintain oil flow rate, then the oil circulation is maintained, but heat is generated making thermal load estimation difficult
Solution Approach 1:
The patent introduces viscosity measurement as an intermediary parameter to indirectly assess thermal load. Instead of directly measuring temperature or heat generation, the system uses viscosity sensors to detect oil viscosity changes, which correlate with thermal conditions and pump load, providing an indirect but effective measurement approach
Solution Approach 2:
The patent replaces direct thermal measurement methods with viscosity-based mechanical measurement. By substituting temperature sensors and thermal monitoring systems with viscosity sensors that measure oil flow resistance, the system achieves thermal load estimation through mechanical property measurement rather than direct thermal detection
2Measurement precision
If viscosity measurement is performed to estimate thermal load, then thermal load estimation becomes possible, but measurement complexity increases
Solution Approach 1:
The patent utilizes the oil's own viscosity properties as the measurement medium. The oil being pumped serves dual purposes: maintaining lubrication and providing the measurement signal itself. This eliminates the need for separate measurement systems or additional substances, reducing overall system complexity while maintaining measurement precision
Solution Approach 2:
The viscosity sensor serves multiple functions: it monitors oil quality, detects thermal conditions, estimates pump load, and triggers maintenance alerts. This multi-functionality reduces the need for separate sensors and systems, thereby reducing device complexity while achieving precise thermal load estimation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate estimation of thermal load, facilitating timely replacement and efficient drive control of the oil pump.
Implementation Method 1
a viscosity sensor 6 that detects viscosity of the oil
Implementation Method 2
a temperature sensor 6a that detects temperature of the oil in the circulation channel 5
Implementation Method 3
an oil pump 2 that circulates oil in a circulation channel 5
Data Source
AI summary
The load estimation method is a method of counting the number of times of activation of the oil pump when the viscosity of the oil discharged from the oil pump is equal to or higher than a threshold value or when the temperature of the oil is equal to or lower than a threshold value, and estimating the thermal load of the oil pump based on the counted number of times of activation.