Rail Vehicle Engine Control via Brake Valve Position Sensor
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Solution Overview
Problem
Older locomotives without integrated electronic air brake systems cannot automatically determine and relay their operational status, limiting their ability to implement efficient automatic engine start/stop operations, which reduces fuel efficiency and increases emissions.
Innovation Solution
A control system that includes a mechanically-adjustable valve and position sensor onboard a rail vehicle, allowing the controller to set and adjust the operational status of the vehicle based on the valve's position, enabling automatic engine shutdown and restart operations, even in the absence of integrated electronic braking systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If integrated electronic air brake systems are installed to enable automatic operational status determination, then automatic engine start/stop operations can be implemented, but device complexity and cost increase
Solution Approach 1:
The patent introduces a mediator device that couples the existing mechanical brake system to the electronic control system. This intermediary component translates mechanical brake valve positions into electronic signals that the controller can process, enabling automatic engine control without requiring a complete electronic braking system replacement.
Solution Approach 2:
The patent creates an electronic copy or representation of the mechanical brake system's operational status through sensors and signal generation. By copying the mechanical valve position information into an electronic format, the system enables digital processing and automatic control decisions without modifying the original mechanical braking infrastructure.
2Loss of energy
If integrated electronic air brake systems are installed to relay operational status automatically, then fuel efficiency improves through AESS operations, but manufacturing cost increases
Solution Approach 1:
The patent makes the engine control dynamic by enabling automatic adjustment based on real-time operational status signals from the brake system. The controller dynamically decides when to start or stop the engine based on current brake valve positions and train operational conditions, optimizing fuel efficiency without requiring static pre-programmed solutions.
Solution Approach 2:
The patent implements a feedback loop where the controller continuously monitors brake system operational status through electronic signals and adjusts engine operations accordingly. This closed-loop feedback mechanism enables automatic engine shutdown during periods when braking is active and automatic restart when braking is released, improving fuel efficiency through continuous optimization.
3Device complexity
If mechanical brake systems are used without electronic integration, then device complexity remains low, but automatic engine start/stop operations cannot be implemented
Solution Approach 1:
The patent makes the mechanical brake system multi-functional by enabling it to serve both its primary braking function and a secondary information-sensing function. The same mechanical valve that controls braking also generates electronic signals about operational status, allowing the system to perform dual roles without adding separate sensing infrastructure.
Solution Approach 2:
The patent substitutes mechanical status indication with electronic signal generation. Instead of relying solely on mechanical linkages and physical indicators to communicate brake system status, the system uses electronic sensors and signals to transmit operational information to the controller, enabling automated decision-making while preserving the mechanical braking mechanism.
Data Source
AI summary
A control system for a vehicle system includes a mechanically-adjustable valve having a plurality of positions, a position sensor, and a controller. The mechanically-adjustable valve is configured to be disposed onboard a rail vehicle that is coupled to at least one other rail vehicle in a consist. The position sensor is configured to be disposed in the rail vehicle to monitor a current position of the mechanically-adjustable valve. The position sensor is configured to generate an output signal that represents the current position of the mechanically-adjustable valve. The controller is configured to be communicatively coupled to the position sensor and to receive the output signal of the position sensor. The controller is configured to set an operational status of the rail vehicle in the consist based on the output signal and to adjust automatic engine shutdown and restart operations of the rail vehicle based on the operational status.