Compressed Air Load Circuit Defect Detection
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Solution Overview
Problem
Conventional multi-circuit protective valves in electronic compressed air systems for vehicles fail to detect defects or failures in compressed air load circuits early, leading to significant energy loss and delayed shutdown of defective circuits, which compromises vehicle safety.
Innovation Solution
The system employs pressure sensors and electronic control units to monitor pressure changes in load circuits, using momentary shutoffs and pulsed tests to differentiate between intact and defective circuits, allowing for early detection and isolation of defective circuits, thereby minimizing energy loss and ensuring safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional multi-circuit protective valves are used to divide energy supply into independent load circuits, then the system can maintain minimum pressure in intact circuits during failure, but the defective circuits are detected and shut off at a relatively late stage causing significant energy loss
Solution Approach 1:
The system performs preliminary detection of circuit defects by monitoring pressure changes during compressor operation. The control unit continuously compares actual pressure values against expected pressure curves, enabling early identification of defects before they cause significant energy loss or system failure.
Solution Approach 2:
The system implements continuous feedback monitoring where pressure sensors provide real-time pressure data to the control unit. The control unit analyzes pressure deviations and provides feedback signals to alert operators or automatically shut off defective circuits, preventing further energy loss.
2Productivity
If conventional protective valves allow dynamic equilibrium with defective circuits, then the compressor can refill intact circuits, but the maximum pressure in the brake system is limited to the opening pressure of the defective circuit
Solution Approach 1:
The system detects pressure deviations before they reach the opening pressure threshold of protective valves. By identifying defects early through continuous pressure monitoring and comparison with expected curves, the system can shut off defective circuits before pressure limitations are imposed on the entire brake system.
3Reliability
If conventional systems allow pressure to drop to closing pressure of defective circuits, then the valve can isolate the defect, but this momentary pressure drop and late detection compromise vehicle safety
Solution Approach 1:
The system performs preliminary defect detection by monitoring pressure changes during compressor operation and comparing actual pressure against expected pressure curves. This enables early identification of defects before pressure drops to dangerous levels, allowing timely isolation and preventing safety compromises.
Solution Approach 2:
Continuous pressure feedback monitoring enables the control unit to detect deviations from expected pressure behavior and trigger early warning or automatic isolation of defective circuits, preventing pressure drops that would compromise vehicle safety.
Data Source
AI summary
To detect a defect or failure of a compressed air load circuit in a compressed air system for vehicles, pressure is measured in compressed air load circuits and evaluated in an electronic control unit, which briefly shuts off the compressed air load circuits, measures pressure values and/or determines pressure gradients during the shutoff time and compares the pressure values and/or the determined pressure gradients with a respective threshold value, identifies defective circuits and definitively shuts off circuits detected as defective if the results are below the threshold value.