Pneumatic System Fault Detection via Regeneration Path Monitoring
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Solution Overview
Problem
Existing methods for regenerating compressed air systems in commercial vehicles fail to effectively detect and counteract defects in the regeneration path, leading to impaired drying capacity and potential damage to components due to blockages, icing, jamming, or wear.
Innovation Solution
A method that involves detecting physical variables in the regeneration path using sensors and a computing unit to analyze and diagnose defects, allowing for targeted strategies to compensate or bypass issues, and adapting the regeneration process accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor and computing unit are added to detect and analyze physical quantities in the regeneration path, then defect detection capability is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback by using sensors to detect physical quantities (pressure, temperature, flow rate) in the regeneration path and feeding this information back to a computing unit for analysis. This closed-loop feedback mechanism enables continuous monitoring and defect detection, resolving the contradiction by making the system more reliable through systematic information gathering about the regeneration process state
Solution Approach 2:
The computing unit acts as an intermediary between the sensors and the control system. It receives raw data from multiple sensors, processes this information, and generates control decisions. This intermediary layer manages the complexity by centralizing the analysis function, allowing the system to detect defects without requiring complex distributed intelligence across all components
2Adaptability or versatility
If the regeneration process is adapted based on defect analysis results, then system functionality is maintained, but control complexity increases
Solution Approach 1:
The patent applies dynamics by making the regeneration process adaptive rather than static. The control system dynamically adjusts regeneration parameters (such as air flow rate, duration, or pressure) based on real-time defect analysis results. This dynamic adaptation allows the system to maintain functionality under varying defect conditions without requiring a completely complex control architecture, as the adjustments are made incrementally based on sensor feedback
3Measurement precision
If physical quantities are measured during regeneration, then defect diagnosis precision is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent employs universal sensors that can measure multiple physical quantities (pressure, temperature, flow rate) within the regeneration path. These multi-functional sensors reduce the overall number of measurement devices needed while providing comprehensive data for defect diagnosis. By using sensors that serve multiple measurement purposes, the system achieves high diagnosis precision without proportionally increasing measurement complexity
Solution Approach 2:
The system utilizes the existing compressed air infrastructure to provide the measurement medium. The compressed air itself serves as the carrier for pressure and flow measurements, and its temperature provides thermal measurement opportunities. This self-service approach means the regeneration process materials and conditions are leveraged for measurement purposes, reducing the need for additional complex measurement systems
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
This approach enables reliable detection and mitigation of defects, ensuring the effective regeneration of dryer cartridges and maintaining the functionality of the compressed air system by quantifying and addressing flow resistance and other issues in real-time.
Implementation Method 1
at least one sensor (7) is provided which, during regeneration, monitors at least one physical quantity of the compressed air in an element of the compressed air system, preferably the regeneration air reservoir (6)
Implementation Method 2
the physical quantity is measured in the regeneration air reservoir
Implementation Method 3
By passing a stream of compressed air containing liquid through this material within the desiccant cartridge, the liquid components are effectively removed
Implementation Method 4
passing dry air, generally from the opposite direction to the flow direction of compressed air intended in normal operation, for example with dry compressed air from a regeneration reservoir, through the moist dryer cartridge in order to absorb or remove the moisture from the material in the dryer cartridge
Data Source
Figure 1
AI summary
The invention relates to a method for identifying at least one fault in a regeneration path (19) of a pneumatic system (1) in a motor vehicle. Said method, in which air is conducted from a regeneration air reservoir (6) through a desiccant cartridge (3) in order to regenerate the desiccant cartridge (3), is characterized in that at least one physical parameter (15) of the air is acquired in a component of the regeneration path (19), the at least one physical parameter (15) is analyzed by an arithmetic unit (14) in order for a fault to be identified, and the result (16) of the analysis is further processed. The invention also relates to an associated device.