Oil Deterioration Estimation Using Color, pH, and Foreign Matter
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Solution Overview
Problem
Existing deterioration estimation devices for oil in automatic transmissions are limited by temperature and usage conditions, restricting their ability to consistently estimate oil deterioration.
Innovation Solution
A deterioration estimation device that uses mapping data to estimate oil deterioration based on the color and hydrogen ion concentration of the oil, which are less affected by temperature and usage conditions, and includes input variables such as foreign matter amount and distribution, shifting number, traveling distance, and traveling time to provide accurate and timely replacement indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature and usage condition thresholds are used as preconditions for deterioration estimation, then the estimation can be performed under controlled conditions, but the estimation cannot always be executed and the applicable situations are limited
Solution Approach 1:
The patent changes the parameters used for deterioration estimation from temperature-based metrics to color and hydrogen ion concentration metrics. This allows the estimation to be performed across a wider range of operating conditions without being constrained by temperature thresholds, thereby improving adaptability while maintaining estimation accuracy through more reliable indicators of actual oil degradation.
2Measurement precision
If multiple input variables including color, hydrogen ion concentration, and foreign matter amount are used in the mapping, then the deterioration estimation accuracy is improved, but the complexity of the estimation system increases
Solution Approach 1:
The patent creates a universal mapping system that can process multiple types of input variables (color, hydrogen ion concentration, foreign matter amount) through a single integrated model. This multi-functional approach allows the system to accommodate various measurement inputs without requiring separate estimation models for each parameter, thereby managing complexity while maintaining high estimation accuracy through comprehensive data analysis.
Data Source
AI summary
A deterioration estimation device includes a storage device and an execution device. The storage device is configured to store mapping data defining a mapping that outputs an output variable indicating the degree of deterioration of oil when an input variable is input. The mapping includes, as the input variable, a color variable that is a variable indicating a color of the oil and a hydrogen ion variable that is a variable indicating a hydrogen ion concentration of the oil. The execution device is configured to execute an acquisition process that is a process of acquiring the input variable and a calculation process of inputting the input variable acquired through the acquisition process to the mapping to output a value of the output variable.