Piston Ring Wear Correlation for Proactive Engine Life Prediction
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Solution Overview
Problem
Traditional methods for predicting engine life are reactive and lack accuracy, relying on increased blowby and low oil pressure, and do not effectively estimate remaining life based on engine wear.
Innovation Solution
A method and system that determine the remaining life of an engine by correlating the quantity of burned fuel with the level of wear on the piston ring, using data from engine control units and actual applications to establish a correlation between fuel burned and ring wear, allowing for estimation of engine life in terms of percentage, years, or mileage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional reactive methods are used to predict engine life, then the prediction is made after problems occur (blowby increase, low oil pressure), but the accuracy and proactive capability are insufficient
Solution Approach 1:
The patent applies preliminary action by measuring piston ring wear early in the engine's operational life and establishing a wear rate baseline before problems occur. This allows the system to proactively predict remaining engine life based on the established wear rate and current ring condition, rather than waiting for reactive indicators like blowby or oil pressure changes. The wear measurement is performed in advance to create a predictive model that can estimate engine life before failures occur.
2Reliability
If piston ring wear is measured to predict engine life, then proactive and accurate estimation is achieved, but the complexity of the measurement and correlation system increases
Solution Approach 1:
The patent uses piston ring wear as an intermediary measurement that directly correlates to engine life. Instead of measuring multiple complex parameters simultaneously, the system focuses on ring wear as a single reliable indicator that can be measured and correlated with fuel consumption data. This intermediary measurement simplifies the overall system while maintaining high reliability, as ring wear provides a direct physical indicator of engine degradation that can be tracked over time.
Solution Approach 2:
The patent implements feedback by continuously monitoring piston ring wear and comparing it against the established wear rate baseline. The system uses fuel consumption data as feedback to calculate cumulative wear and update the remaining engine life prediction. This feedback loop allows the system to adapt and refine its predictions as the engine operates, improving reliability while using a manageable level of system complexity.
3Measurement precision
If reactive indicators (blowby, oil pressure) are monitored, then traditional prediction methods are simple to implement, but the ability to accurately estimate remaining engine life is limited
Solution Approach 1:
The patent applies parameter changes by shifting from monitoring traditional reactive parameters (blowby, oil pressure) to measuring piston ring wear directly. The system changes the measurement parameter from indirect indicators of engine health to a direct physical measurement of component degradation. This parameter change enables more precise remaining life estimation because ring wear provides a direct measure of the actual degradation process, rather than indirect symptoms of engine problems.
Data Source
Figure 1A~1C
Figure 2
Figure 3A~3B
AI summary
Systems, apparatuses, and methods disclosed provide for estimating the remaining life for an engine. The method includes determining a correlation between a quantity of burned fuel and a level of wear of a piston ring for an engine. The level of wear of the piston ring is indicative of a remaining life of the engine. The method also includes determining a current quantity of burned fuel by the engine, and determining the remaining life of the engine based on the correlation and the current quantity of burned fuel by the engine.