Automatic Locomotive Brake Bail Off Controller
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Solution Overview
Problem
Locomotive operators face distraction and increased workload due to the need to perform two simultaneous operations to apply train brakes and bail off locomotive brakes, which can lead to errors in decision-making during train braking events.
Innovation Solution
A controller is programmed to automatically send a bail off command to the locomotive braking system, releasing a predetermined amount of pressure from the locomotive brake cylinders, thereby reducing the operator's manual input requirements during train braking events, and can be integrated with conventional train braking systems to enable automatic bail off operations based on predefined conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the locomotive operator manually performs both brake application and bail off operations, then the train brakes can be applied and locomotive brakes bailed off, but the operator's workload increases and attention is distracted from other critical decisions
Solution Approach 1:
The system enables self-service automation where the controller automatically performs the bail off operation based on detected brake application events, eliminating the need for manual operator intervention. The controller monitors brake pipe pressure changes and autonomously commands the brake cylinder to release pressure, allowing the system to service itself without human input.
Solution Approach 2:
The invention extracts the bail off function from the manual operator controls and relocates it to an automated controller system. By separating this specific function from general operator responsibilities, the system removes the distracting manual operation while preserving the essential safety function through automated execution.
2Reliability
If the operator focuses on multiple simultaneous operations, then comprehensive control is maintained, but the risk of errors increases due to divided attention
Solution Approach 1:
The controller serves as an intermediary between the brake application input and the bail off execution. It receives the operator's brake application command, processes the information by detecting pressure changes, and automatically generates the appropriate bail off response, mediating the control process to eliminate manual intervention errors.
Solution Approach 2:
The system implements feedback by continuously monitoring brake pipe pressure changes and using this information to trigger automated bail off actions. The controller detects the brake application event through pressure sensing and automatically responds with the appropriate bail off command, creating a closed-loop control system that reduces errors.
3Productivity
If manual bail off is required for every brake application, then precise control is maintained, but the time required for operations increases
Solution Approach 1:
The system performs preliminary programming of the bail off logic in the controller, so that when a brake application occurs, the automated response is already prepared and can be executed immediately. The controller is pre-configured with the decision logic that automatically triggers bail off based on detected brake events, eliminating the time required for manual decision-making and execution.
Data Source
AI summary
A system for automatically performing a bail off of the locomotive brakes in response to certain train braking operations without the need for the train operator to manually bail off the locomotive brakes. The system includes a controller that is programmed to determine when an appropriate train braking operation has been requested and to issue commands to the locomotive braking system to cause the locomotive brake cylinder to be reduced to zero pressure or a predetermined minimum pressure. The controller is also programmed to determine when an automatic bail off should be inhibited and/or cancelled depending on ongoing train conditions.