Compressed Air Component Lifetime Prediction via Degradation Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for predicting the remaining lifetime of components in compressed air supply systems for commercial vehicles are unreliable due to overspecified safety margins, leading to unnecessary maintenance and the risk of premature failure under heavy use.
Innovation Solution
A device that calculates a lifetime decrement value based on usage quantity and environmental/state variables, allowing for accurate prediction of component degradation and maintenance needs, using offline calibration and integration of degradation rates to provide real-time maintenance alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large safety margins are built into component specifications, then component reliability is improved and premature breakdown is prevented, but components are serviced more often than necessary and service life is not used up efficiently
Solution Approach 1:
The patent changes the parameter of maintenance scheduling from fixed time intervals to condition-based intervals. By continuously monitoring actual component degradation through sensors and comparing it against degradation models, the system dynamically adjusts maintenance timing. This allows components to be serviced exactly when needed rather than following conservative fixed schedules, thereby improving service life efficiency while maintaining reliability.
Solution Approach 2:
The patent implements a feedback mechanism where actual component degradation is continuously monitored via sensors and fed back to the maintenance management system. This feedback loop allows the system to compare real-time degradation data against predicted degradation models, enabling dynamic adjustment of maintenance schedules. The feedback ensures that maintenance is performed based on actual component condition rather than conservative estimates, optimizing service life utilization.
2Loss of time
If safety margins are reduced to improve service life efficiency, then components are serviced less often, but the risk of premature component failure increases
Solution Approach 1:
The patent replaces the mechanical/time-based maintenance system with an information-based condition monitoring system. Instead of relying on conservative time-based schedules or physical inspection intervals, the system uses sensors, data transmission, and computational models to continuously assess component health. This substitution enables precise determination of actual component condition, allowing reduced safety margins without increasing failure risk.
Solution Approach 2:
The patent enables the component maintenance system to self-monitor and self-assess its own condition through integrated sensors and degradation models. The system automatically tracks degradation parameters, compares them against thresholds, and determines when maintenance is actually needed. This self-service capability eliminates the need for conservative external scheduling, allowing optimization of service intervals based on real component status.
3Ease of operation
If simple time-based maintenance scheduling is used, then ease of operation is improved, but measurement precision of actual component degradation is insufficient
Solution Approach 1:
The patent creates a universal maintenance management system that can handle both simple and complex maintenance scenarios. The system is designed to accommodate basic time-based scheduling when appropriate while also supporting sophisticated condition-based monitoring when needed. This multi-functionality allows the system to maintain ease of operation for simple cases while providing high-precision degradation measurement when components require it, thereby resolving the contradiction between simplicity and precision.
Data Source
AI summary
A device is provided for predicting the remaining lifetime of a component in a compressed air supply system for a vehicle. This device includes a memory unit for a value related to the degradation of the component, at least one first input for a usage quantity which is a measure for the operating time and/or number of operating cycles of the component and/or for the amount of compressed air delivered by the compressed air supply system, at least one second input for at least one state variable which is a measure for at least one vehicle and/or air supply operation condition or environmental condition. It also includes an evaluation unit that is configured to combine the usage quantity and the state variable into a lifetime decrement value that is a measure for the degradation of the component caused by the usage according to the usage quantity, and update the value in the memory unit according to this lifetime decrement value.