Centralized Brake Control for Train Pipe Pressure
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Solution Overview
Problem
Current brake control systems for high-speed trains are complex and costly, requiring individual Brake Control Units (BCUs) on each car, with limited network transmission flexibility and high operational costs, especially when integrating Electronic Brake Control Units (EBCUs) and Pneumatic Brake Control Units (PBCUs).
Innovation Solution
A centralized brake control system and method that uses a main blast pipe to control train pipe pressure based on real-time and target pressures, allowing flexible marshaling and eliminating the need for BCUs on individual cars by using a pressure acquisition device and train pipe control device connected via an air channel, with a solenoid valve for air supply or discharge, enabling five-line control signals for efficient braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a direct brake control system with BCU on each car is adopted, then braking control precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the electronic control function from each individual car and concentrates it in the control car's brake control system. The BCU functionality is removed from middle trailer cars and centralized in one location, reducing overall system complexity while maintaining braking control precision through the remaining pneumatic control mechanisms.
Solution Approach 2:
The brake control system in the control car serves multiple functions: it controls braking for the entire train set, manages air supply through the main blast pipe, and coordinates with both electric and pneumatic brake systems. This multi-functional design eliminates the need for separate BCUs on each car while maintaining comprehensive brake control capability.
2Reliability
If BCU is integrated on each car, then braking control capability is improved, but installation space and cost increase
Solution Approach 1:
The BCU integration is extracted from middle trailer cars and relocated to the control car. This removes the volume requirement for BCUs from multiple cars while concentrating the control functionality in one location, thereby reducing total installation space without compromising braking control capability.
Solution Approach 2:
The brake control functionality that would be distributed across multiple cars is merged into a single centralized system in the control car. The control car's brake control system integrates electronic control and pneumatic management functions, eliminating the need for separate BCU units on each car and reducing overall installation space.
3Speed
If network-based brake instruction transmission is used, then information transmission speed is improved, but system flexibility and adaptability decrease
Solution Approach 1:
The patent employs pneumatic pressure waves through the train pipe and main blast pipe as the primary control medium for brake instruction transmission. This pneumatic approach replaces or supplements network-based transmission, enabling flexible adaptation to different marshaling configurations since pneumatic signals propagate through the physical train pipe connectivity regardless of network topology or car arrangement.
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
This solution reduces installation space and costs by centralizing brake control, allowing flexible marshaling and efficient pressure management, enabling operation with automatic electro-pneumatic braking without the need for BCUs on middle trailer cars, thus enhancing operational flexibility and reducing expenses.
Implementation Method 1
a pressure of the train pipe is controlled, through a main blast pipe, according to the brake request and a relationship between the real-time pressure of the train pipe and the target pressure of the train pipe
Implementation Method 2
A solenoid valve of the PBCU is controlled to operate to generate precontrol pressure of pneumatic brake
Data Source
AI summary
A system for controlling centralized brake of vehicles, comprising: a pressure collection device for collecting the pressure of a main blast pipe and a train pipe control device. The pressure signal output end of the pressure collection device is connected to the pressure signal input end of the train pipe control device; the brake signal input end of the train pipe control device is connected to the brake signal output end of a brake controller; the train pipe control device is pneumatically connected to the main blast pipe and a train pipe separately by means of an air channel. By means of the solution, the installation space of a trailer is reduced, and the costs are lowered. In addition, the change in the pressure of the train pipe is controlled by an automatic brake control system, the train can operate after being connected to an automatically air-braked coach, according to a brake request output by the brake controller and the detection of the real-time pressure of the train pipe, the change in the pressure of the train pipe is controlled, and a five-line control signal is used, so that flexible marshalling can be implemented.