Automatic Main Air Pressure Adjustment for Rail Vehicle Brake Valves
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing driver's brake valves in rail vehicle trains require manual adjustment of main air line pressures, which can be forgotten, leading to incomplete brake release during overloading, and existing solutions are not suitable for all train configurations or require extensive integration.
Innovation Solution
A valve device controlled by the main air line pressure and pilot pressure, which automatically adjusts the relay valve's control side with compressed air from a pressure medium tank, ensuring automatic adjustment during braking processes, and can be easily integrated into conventional brake valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of main air line pressures is required, then the driver can control brake pressure, but the adjustment process can be forgotten leading to incomplete brake release
Solution Approach 1:
The system automatically detects overloading conditions through pressure sensors and triggers the adjustment process without driver intervention. The control unit monitors main air line pressure and autonomously activates the adjustment valve when overloading is detected, eliminating the need for manual adjustment and preventing forgotten operations.
Solution Approach 2:
The system continuously monitors main air line pressure through sensors and provides feedback to the control unit. When pressure exceeds predetermined thresholds indicating overloading, the control unit receives this feedback and automatically initiates the adjustment process, creating a closed-loop control system that ensures reliable brake release.
2Adaptability or versatility
If adjustment valves are integrated into each control valve, then fixed train units can be adjusted, but the solution is not suitable for all train configurations
Solution Approach 1:
The adjustment device is designed as a universal system that can be integrated into existing driver's brake valves across different train configurations. The control unit and adjustment valve work with the existing relay valve structure, making the system adaptable to various train types without requiring complete system redesign or extensive integration into each control valve.
Solution Approach 2:
The system separates the adjustment function into a standalone module with control unit, pressure sensors, and adjustment valve that can be independently integrated into existing brake systems. This segmentation allows the solution to be adapted to different train configurations without requiring integration into each individual control valve throughout the train.
3Reliability
If automatic adjustment is implemented, then reliability improves, but the device complexity increases
Solution Approach 1:
The control unit automatically detects overloading conditions and triggers the adjustment process without requiring additional complex control systems or driver intervention. The system uses existing pressure sensors and a simple control logic that monitors pressure thresholds and autonomously activates the adjustment valve, maintaining reliability while minimizing added complexity.
Solution Approach 2:
The control unit acts as an intermediary between the pressure sensors and the adjustment valve, using simple pressure threshold comparison logic to trigger adjustment. This intermediary layer adds minimal complexity while ensuring reliable automatic adjustment by mediating between sensor input and valve actuation through straightforward control algorithms.
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
Ensures reliable and automatic adjustment of main air line pressures, preventing incomplete brake release due to overloading and simplifying the integration process for various train configurations.
Implementation Method 1
a pressure medium tank (Z1) for the temporary storage of compressed air, with which a control side (Z) of a relay valve can be acted upon
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The device (1) has a pressure medium reservoir (Z1) for temporary storage of compressed air. A control side (Z) of a relay valve of a driver brake valve (D) is subjected with the compressed air for adjusting process by the operation of a manual control part. A valve device (SV1) is controlled by the pressure of a main air supply (HL), and subjects the control side of the relay valve from the reservoir. The valve device comprises a 2/2-way valve (SV2) and a pressure switch solenoid valve combination controlled by pilot pressure (Cv) or brake pressure (C) against the operation of a spring unit.