Pneumatic Brake Leak Detection Through Sub-Circuit Isolation
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Solution Overview
Problem
Existing pneumatic braking systems face challenges in reliably and efficiently detecting leaks, which can degrade braking performance, reduce fuel efficiency, and pose safety risks due to the complexity of the systems and the need for manual detection methods that are prone to human error.
Innovation Solution
A leak detection system that integrates with the pneumatic braking system's control unit to individually control valves, isolate sub-circuits, and monitor pressure to automatically detect leaks without disconnection of fittings, using pressure sensors to pinpoint the leak location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
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 deteriorates due to the complexity and length of the pneumatic braking system
Solution Approach 1:
The patent replaces manual visual and auditory detection methods with an automated electronic detection system that uses pressure sensors and a control unit to automatically locate leaks in the pneumatic braking system, thereby improving reliability while maintaining ease of operation
Solution Approach 2:
The patent introduces pressure sensors as intermediary devices that measure pressure at multiple locations in the pneumatic circuit, enabling the control unit to calculate and identify leak locations without requiring direct human observation or intervention
2Reliability
If a technician actively tests each circuit for leakage by connecting testing devices, then leak detection can be performed, but the device complexity and operational difficulty increases due to the need for pneumatic line connections and fittings
Solution Approach 1:
The patent integrates the leak detection function into the existing electronic control unit of the pneumatic braking system, allowing the control unit to perform both its primary control functions and leak detection functions, thereby eliminating the need for separate testing devices and reducing overall system complexity
Solution Approach 2:
The pneumatic braking system performs self-diagnosis for leak detection using its own integrated sensors and control unit, eliminating the need for external testing devices and technician intervention, thereby reducing device complexity while maintaining reliable leak detection
3Productivity
If leaks are not detected promptly, then the system continues to operate, but the compressor run time increases reducing fuel efficiency
Solution Approach 1:
The patent implements a feedback mechanism where the control unit continuously monitors pressure sensor data, automatically identifies leaks when pressure differentials indicate leakage, and notifies the driver, enabling timely detection and response to prevent prolonged compressor operation and fuel waste
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
Enhances leak detection reliability, improves braking system quality, reduces compressor run time, and increases fuel efficiency by automating the leak localization process, especially beneficial for autonomous vehicles.
Implementation Method 1
the pressure sensor is integrated in the pneumatic braking system
Data Source
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.