Pneumatic Brake Sub-Circuit Isolation for Leak Localization
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Solution Overview
Problem
Pneumatic braking systems in vehicles are prone to leaks due to their complex nature, which can lead to reduced braking effectiveness, increased compressor run time, and decreased fuel efficiency. Existing detection methods rely on visual or auditory cues, which are not reliable or efficient for large vehicles.
Innovation Solution
A leak detection system that utilizes a control unit to individually control valves in the pneumatic circuit, isolating sub-circuits to detect pressure drops and locate leaks without disconnection of fittings. This system can be integrated into an electronic control unit or implemented as an external unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual or auditory detection methods are used to locate leaks, then the detection process is simple, but the reliability and efficiency of leak detection are poor
Solution Approach 1:
The patent replaces manual visual and auditory detection methods with an automated electronic leak detection system that uses pressure sensors and control units to automatically detect and locate leaks in pneumatic braking circuits, significantly improving reliability while managing complexity through systematic circuit isolation
Solution Approach 2:
The patent divides the complex pneumatic braking system into multiple isolatable sub-circuits that can be individually tested. By segmenting the system into manageable sections controlled by specific valves, the detection process becomes systematic and reliable without requiring overly complex equipment
2Ease of operation
If a technician actively tests each circuit for leakage by connecting testing devices, then leak detection can be performed, but the process requires specialized training and pneumatic line disconnection
Solution Approach 1:
The system enables self-service leak detection by utilizing the existing pneumatic circuit components (valves, pressure sensors, and lines) already present in the braking system. The control unit automatically isolates sub-circuits and monitors pressure changes, eliminating the need for external testing devices and specialized technician procedures
Solution Approach 2:
The leak detection system leverages the existing multi-functional pneumatic components already in the braking system. The same valves used for brake control are repurposed for circuit isolation during leak detection, and pressure sensors serve dual purposes in both brake operation and leak detection
3Productivity
If leaks are not detected timely, then the system continues operating, but braking effectiveness is reduced and fuel efficiency decreases
Solution Approach 1:
The system performs preliminary leak detection by automatically monitoring pressure changes in isolated sub-circuits before significant performance degradation occurs. The control unit systematically tests each circuit section and identifies leaks early, allowing corrective action before braking effectiveness is compromised
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
The system enables non-invasive, automated leak detection, improving the reliability and safety of locating leaks, enhancing the overall quality and fuel efficiency of the pneumatic braking system.
Implementation Method 1
The leak detection module is configured to monitor a pressure in the pneumatic circuit for leaks, wherein the leak detection module detects a leak in the sub-circuit if the pressure decreases while the sub-circuit is isolated
Data Source
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AI summary
The disclosure relates to a leak detection system for a pneumatic braking system of a vehicle. The pneumatic braking system has a control unit, a pneumatic circuit, and an air tank configured to supply pneumatic pressure to the pneumatic circuit. The pneumatic circuit has a plurality of valves configured to be individually controlled by the control unit. The link detection system includes program code configured, when executed by a processor, to individually control the valves of the pneumatic circuit so as to isolate a sub-circuit of the pneumatic circuit. The leak detection module is configured to monitor a pressure in the pneumatic circuit for leaks, wherein the leak detection module detects a leak in the sub-circuit if the pressure decreases while the sub-circuit is isolated.