Train Brake Control Device Reducing Valve Frequency
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Solution Overview
Problem
Conventional train brake systems face challenges in maintaining consistent brake force due to fluctuations in electric brake force, leading to increased operation frequency of electromagnetic valves in air brake devices, which shortens their lifespan.
Innovation Solution
A brake control device and method that acquire and adjust necessary brake forces for each car, compensating for electric brake force fluctuations by distributing air brake force, thereby reducing the operation frequency of electromagnetic valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If air brake force is distributed to all cars to compensate for electric brake force fluctuations, then brake force consistency is improved, but electromagnetic valve operation frequency increases and lifespan decreases
Solution Approach 1:
The train composition is segmented into motor cars and trailer cars with different brake force distribution strategies. Motor cars receive air brake force only when electric brake force is insufficient, while trailer cars receive air brake force to supplement any shortfall from weighted distribution. This segmentation allows the system to maintain brake force consistency while reducing overall electromagnetic valve operations.
Solution Approach 2:
Instead of distributing air brake force to all cars to fully compensate for every fluctuation in electric brake force, the system applies partial compensation only when necessary. Air brake force is supplied only when the detected electric brake force is less than the necessary brake force, avoiding excessive valve operations for minor fluctuations.
2Measurement precision
If electromagnetic valves are operated frequently to maintain brake force during electric brake fluctuations, then brake control precision is improved, but valve lifespan is shortened
Solution Approach 1:
The brake control device continuously detects the actual electric brake force generated by motor cars and compares it with the necessary brake force. Based on this feedback, the system determines whether air brake force supplementation is needed, enabling precise brake control while avoiding unnecessary valve operations that would reduce lifespan.
3Reliability
If air brake force is distributed to motor cars when electric brake force is insufficient, then brake force adequacy is improved, but system complexity increases
Solution Approach 1:
Different quality of brake force control is applied to different car types based on their specific characteristics. Motor cars, which have electric brakes, receive air brake force only when needed to supplement insufficient electric brake force. Trailer cars, which rely entirely on air brakes, receive air brake force distributed according to weighted distribution. This local quality approach ensures brake force adequacy while simplifying control logic for each car type.
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 solution extends the lifespan of electromagnetic valves by reducing their operation frequency, ensuring consistent brake performance and reducing errors associated with simultaneous valve operation.
Implementation Method 1
An air brake device supplies air to or exhausts air from the brake cylinder by magnetizing or demagnetizing electromagnetic control valves
Implementation Method 2
A friction brake device generates the brake force by pressing a brake shoe against a disc or drum mounted on a wheel or axle
Data Source
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AI summary
The present invention reduces the operation frequency of electromagnetic valves in an air brake device of a train containing a motor car. A necessary brake force acquisition unit (12) acquires the necessary brake force necessary for each car or flatcar of a train containing a motor car. An electric brake force detection unit (11) detects an electric brake force of the entire composition of the train. A brake force adjustment unit (13) distributes the air brake force so that fluctuations in the electric brake force are compensated for by the air brake force of one car or flatcar, in an operating period of one deceleration of the train or from running to stopping. A brake force command unit (14) sends a command to an air brake control device (2) for the value distributed by the brake force adjustment unit (13). The air brake control device (2) controls the air brake of the car in accordance with the value commanded.