Electro-pneumatic Brake Multi-stage Pressure Control
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Solution Overview
Problem
Current electro-pneumatic brakes in China do not meet the UIC540-2006 standard, lacking the multi-stage relief functionality and continuous control response required for efficient train braking and safety.
Innovation Solution
An electro-pneumatic brake system incorporating a total air module, equalizing reservoir pressure control module, brake pressure adjustment module, and parking brake pressure control module, with relay valves and solenoid valves to manage air pressure and flow, enabling gradual pressure changes and multi-stage braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a one-time relief type braking system (AAR system) is used, then the braking system is simple in structure, but the controlled response is non-continuous and cannot achieve multi-stage relief
Solution Approach 1:
The braking system is segmented into multiple relief stages through the introduction of an equalizing reservoir and staged pressure control mechanism. The equalizing reservoir divides the pressure relief process into incremental steps, allowing the brake pipe pressure to be reduced in multiple stages rather than all at once, thereby achieving continuous controlled response while maintaining operational simplicity
Solution Approach 2:
The system transitions from a static one-time relief mechanism to a dynamic multi-stage relief system. The equalizing reservoir enables the pressure control to adapt dynamically by releasing air in controlled stages based on the brake pipe pressure differential, allowing the braking force to be adjusted continuously during the relief process
2Ease of operation
If a multi-stage relief type braking system (UIC system) is used, then the controlled response is continuous and multi-stage relief is achieved, but the complete relief time is long
Solution Approach 1:
The equalizing reservoir acts as an intermediary device between the brake pipe and the brake cylinders. It mediates the pressure transfer by storing and gradually releasing air pressure in controlled stages, enabling continuous control response while accelerating the overall relief process through efficient pressure equalization
Solution Approach 2:
The system changes the pressure parameter control strategy by using the equalizing reservoir to regulate pressure release in optimized stages. The reservoir controls the rate and timing of pressure changes, allowing faster complete relief while maintaining continuous controllability through staged pressure differential exploitation
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 achieves compliant multi-stage braking and continuous control response, enhancing train braking efficiency and safety by allowing adjustable braking force and pressure management, meeting the UIC540-2006 standard.
Implementation Method 1
a relay valve, and, the relay valve controls the charging and discharging of the train pipe by the pressure difference between the equalizing reservoir and the train pipe
Implementation Method 2
the total air module is communicated with a compressor
Data Source
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AI summary
Disclosed is an electric-air brake, comprising a main air module, a balanced air cylinder pressure control module, a brake pressure regulating module and a parking brake pressure control module. The balanced air cylinder pressure control module includes a balanced air cylinder (1), a first air supply pipeline which communicates with the main air module to supply air to the balanced air cylinder (1), a second air supply pipeline which communicates with the main air module to supply air to a train pipe, and a relay valve (2), wherein the air supply and air exhaust of the train pipe are controlled by the relay valve (2) under the action of the pressure difference between the balanced air cylinder (1) and the train pipe. Under the control of the balanced air cylinder pressure control module, the pressure of the train pipe is gradually changed or the pressure of the train pipe is changed in stages, thereby realizing the adjustment of a braking force of a locomotive in stages, and complying with the UIC 540-2006 Standard Requirements.