Rail Vehicle Brake System Emergency Mode Switching
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Solution Overview
Problem
Existing rail vehicle braking systems require operator intervention and additional electrical connections during emergency operations, complicating the process of rescuing a rail vehicle by transferring it to a safe section of track.
Innovation Solution
A braking system with a first emergency brake control valve and changeover valve configuration that automatically switches between service and emergency modes, releasing or blocking emergency braking flow paths without the need for operator actions or additional electrical connections, utilizing pneumatic connections and pressure converters to control compressed air flow paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If operator intervention and additional electrical connections are used during emergency operations, then the braking system can be controlled, but the complexity of the rescue operation increases and additional electrical infrastructure is required
Solution Approach 1:
The patent extracts the electrical control dependency from the emergency braking operation by introducing a purely pneumatic control mechanism. The emergency line and changeover valve means enable emergency braking to be initiated and controlled through pneumatic pressure signals alone, removing the need for electrical connections during rescue operations.
Solution Approach 2:
The emergency line acts as a pneumatic intermediary that transmits control signals between the emergency brake control valve means and the changeover valve means. This pneumatic mediator replaces electrical signaling, enabling communication and control without electrical infrastructure during emergency operations.
2Productivity
If manual operator actions are required in all cars during emergency operations, then precise control can be achieved, but the time and complexity of rescue operations increases
Solution Approach 1:
The braking system performs self-service during emergency operations by automatically switching between service braking and emergency braking modes through the pneumatic changeover valve means. The system self-regulates the braking force application based on pneumatic pressure signals without requiring continuous manual intervention in each car, enabling faster rescue operations.
Solution Approach 2:
The changeover valve means is pre-configured with pneumatic control connections that automatically activate emergency braking functions when pneumatic pressure is applied to the emergency line. This preliminary setup eliminates the need for operators to manually reconfigure or intervene in each car during emergency rescue operations.
3Adaptability or versatility
If the emergency line is kept pressureless during service operation, then service braking control is maintained, but the system requires additional changeover valve means increasing complexity
Solution Approach 1:
The changeover valve means serves multiple functions: it controls the transition between service braking and emergency braking modes, manages pneumatic pressure distribution, and enables automatic emergency response. This multi-functional design consolidates several control functions into a single valve mechanism, reducing overall system complexity despite the dual-mode requirement.
Solution Approach 2:
The system dynamically switches between service and emergency braking modes through the changeover valve means响应 to pneumatic pressure changes in the emergency line. The valve automatically adjusts its position based on the pressure state, enabling adaptive braking control without requiring complex manual switching mechanisms in each car.
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
Enables automatic emergency operation of the braking system, allowing a rail vehicle to be safely transferred without operator intervention or additional electrical connections, ensuring efficient and reliable emergency braking and parking brake control.
Implementation Method 1
an emergency control valve means, which has a pneumatic control connection connected to the emergency line
Implementation Method 2
a first changeover valve means, the pneumatic control port of which is connected to the emergency line, so that the first changeover valve means is held in a first position during service operation and in a second position during emergency operation
Data Source
Figure 1
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AI summary
The invention relates to a brake system (6), comprising a first emergency brake control valve means (34a), a first emergency brake flow path (NBa), which is operatively connected to at least one first compressed-air brake cylinder (12), for compressed air controlled by the first emergency brake control valve means (34a), an emergency line (NL), and a first switch-over valve means (38a), the pneumatic control connection (38a4) of which is connected to the emergency line (NL). The emergency line (NL) is kept at zero pressure (ND = 0) during a service operation of the brake system (6), and during an emergency operation of the brake system (6), a pressure (ND≠0) is applied to the emergency line (NL) such that during the service operation, the first switch-over valve means (38a) is kept in a first position, and during an emergency operation, the first switch-over valve means is kept in a second position. In order to improve the emergency operation of the brake system, the first switch-over valve means (38a) is designed such that in the first position of the first switch-over valve means, the first emergency brake flow path (NBa) is cleared and a first emergency flow path (NFa) is blocked to compressed air controlled by an emergency control valve means (37), and in the second position of the first switch-over valve means, the first emergency flow path (NBa) is blocked and the first emergency flow path (NFa) is cleared. The invention further relates to a rail vehicle (1) having such a brake system (6), and to a method for operating a brake system (6).