Dynamic Braking Control for Train Loading Operations
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Solution Overview
Problem
Traditional train braking systems experience delays in brake application propagation, leading to uneven braking and increased in-train forces during loading and unloading operations, which can cause coupler wear and inefficiencies.
Innovation Solution
A dynamic braking control system that allows for independent braking profiles to be set for groups of vehicles, enabling synchronized movement and reduced in-train forces by varying braking effort among vehicles, even when communication with the lead locomotive is disrupted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional pneumatic braking system is used, then the system structure is simple, but the brake application propagation time is long (up to two minutes or more) and braking is uneven
Solution Approach 1:
The patent replaces the traditional mechanical pneumatic braking system with an electronically controlled braking system. Each vehicle is equipped with a processor that receives braking commands and controls brake actuators independently, eliminating the need for pneumatic valves and air reservoirs to propagate braking signals. This electronic substitution dramatically reduces brake application propagation time from minutes to seconds while maintaining system functionality.
Solution Approach 2:
The patent divides the train braking system into independent vehicle-level control units. Each vehicle has its own processor that can independently receive and execute braking commands, rather than relying on a centralized pneumatic signal propagation system. This segmentation allows simultaneous brake application across all vehicles, improving propagation speed while distributing system complexity across multiple independent units.
2Object-affected harmful factors
If brakes of all rail cars are controlled to the same percentage of braking (S-4200 standard), then in-train forces are reduced, but coupler wear increases during loading and unloading operations due to uneven braking
Solution Approach 1:
The patent implements local quality by allowing different vehicles or groups of vehicles to have different braking percentages tailored to their specific operational needs. During loading and unloading operations, vehicles can be assigned customized braking profiles that optimize for minimal coupler wear rather than uniform braking. This localized control enables productivity improvement while managing harmful factors through vehicle-specific parameter adjustment.
Solution Approach 2:
The patent introduces dynamic braking control where braking percentages can be adjusted in real-time based on operational conditions. During loading and unloading, the system can dynamically modify braking forces on individual vehicles or groups to minimize coupler wear while maintaining operational efficiency. This dynamic adjustment capability allows the system to adapt braking characteristics to specific task requirements rather than applying static uniform braking.
3Ease of operation
If indexed or stepped movement is used during loading/unloading operations, then movement control is achieved, but undesirable levels of in-train forces and wear on couplers are produced
Solution Approach 1:
The patent changes the braking parameter from fixed indexed/stepped movement control to continuous dynamic braking percentage adjustment. By allowing braking force to be varied continuously rather than in discrete steps, the system can smooth out in-train forces during loading and unloading operations. This parameter change enables precise control of movement while minimizing harmful forces and coupler wear through optimized braking profiles.
Data Source
AI summary
Disclosed is a method, system, and computer readable medium including program instructions for controlling the braking of one or more vehicles in a vehicle system positioned for unloading/loading of cargo. The vehicle system includes a designated head-end and a tail-end and each of the one or more vehicles is equipped with an electronic braking system in communication with a central control via a communication network spanning across the vehicle system. A dynamic unloading/loading braking profile can be set on at least one electronic braking system on at least one vehicle. During unloading/loading of the cargo from one or more vehicles in the vehicle system, the braking on at least one of the vehicles in the vehicle system is controlled via the dynamic unloading/loading braking profile.