Pneumatic Brake Abnormal Detection via Chamber Pressure Segmentation
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Solution Overview
Problem
Existing brake assist systems for large vehicles fail to accurately detect abnormal pneumatic brake pressure, leading to delayed or inadequate brake activation, increasing the risk of accidents due to insufficient information and low response times for drivers.
Innovation Solution
An abnormal detecting system that includes a pedal stroke sensor, front and rear brake chamber pressure sensors, a storage unit pressure sensor, a parking brake switch, and an abnormal detecting circuit, which compares signals to output abnormal signals and activate a backup brake module when necessary, enhancing the accuracy and speed of fault detection and response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only air reservoir pressure is detected to determine abnormal pneumatic brake, then the detection system is simple, but the detection accuracy is insufficient and cannot distinguish front/rear brake failures
Solution Approach 1:
The patent divides the single air reservoir pressure detection into separate front and rear brake chamber pressure detections. By segmenting the detection system into independent front brake chamber pressure sensor and rear brake chamber pressure sensor, the system can accurately identify whether front brake, rear brake, or both brakes fail, significantly improving measurement precision without requiring complete system redesign
Solution Approach 2:
The abnormal detecting circuit serves multiple functions: it detects abnormal pressure in front brake chambers, abnormal pressure in rear brake chambers, and coordinates with the backup module to provide emergency braking. This multi-functional design improves detection accuracy while managing system complexity through integrated circuit design
2Reliability
If backup method increases air source to solve brake failure, then the backup capability is enhanced, but the response time is still insufficient in extreme situations
Solution Approach 1:
The system performs preliminary detection of abnormal pressure conditions in front and rear brake chambers before actual brake failure occurs. The abnormal detecting circuit continuously monitors pressure signals and identifies anomalies early, allowing the backup module to be activated in advance, thus reducing the response time loss in extreme situations
Solution Approach 2:
The system implements feedback by continuously comparing detected pressure signals with normal operating ranges. When abnormal pressure is detected in front or rear brake chambers, the system provides immediate feedback to activate the backup module, ensuring rapid response and enhancing brake backup reliability without significant time delay
3Ease of operation
If brake assist system only displays warning messages, then the system complexity is low, but the driver cannot fully solve brake failure situation
Solution Approach 1:
The system implements self-service by automatically activating the backup module when abnormal pressure is detected in front or rear brake chambers. Instead of requiring the driver to manually respond to warning messages, the system autonomously activates emergency braking, maintaining ease of operation while significantly improving brake failure resolution capability and reliability
Data Source
AI summary
An abnormal detecting system for a pneumatic brake includes a pedal stroke sensor, a front chamber pressure sensor, a rear chamber pressure sensor, a storage unit pressure sensor, a parking brake switch and an abnormal detecting circuit. A pedal stroke signal, a front chamber pressure signal, a rear chamber pressure signal, an air storage unit pressure and a parking brake control signal are output. The abnormal detecting circuit receives the pedal stroke signal, the front chamber pressure signal, the rear chamber pressure signal, the air storage unit pressure signal and the parking brake control signal. The abnormal detecting circuit compares the pedal stroke signal with the front chamber pressure signal or the rear chamber pressure signal and then outputs a first abnormal signal; and the abnormal detecting circuit compares the parking brake control signal and then outputs a second abnormal signal.