Air Compressor Load Control for Train Brake Test Venting

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Solution Overview

Problem

The current practice of carrying air during train car brake tests results in costly energy consumption, increased compressor maintenance, and reduced compressor lifespan due to the venting of compressed air to atmosphere until all hoses are coupled.

Innovation Solution

An air compressor load control device that automatically adjusts the air pressure based on sensed conditions, switching between full pressure, regulated pressure, and no air supply to optimize energy efficiency and reduce unnecessary compressor load.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If compressed air is vented to atmosphere during brake testing, then the inspector can quickly identify train-line obstructions and leaks, but power consumption increases and compressor lifespan is reduced

Engineering Contradiction:

Improvebrake testing reliabilityVSAvoidcompressor power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically switches between full pressure mode and venting mode based on real-time detection of train-line conditions. When obstructions or leaks are detected, the system automatically adjusts air flow to maintain testing capability while minimizing energy waste during normal operation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses sensors to continuously monitor air pressure and flow conditions in the train-line, providing feedback to the control system. This feedback enables automatic adjustment of compressor operation to match actual system needs, preventing unnecessary energy consumption while maintaining brake testing reliability.

Inventive Principle:

Principle #23Feedback

2Reliability

If the compressor runs at full load for extended periods, then air supply is maintained, but maintenance requirements increase and compressor life is shortened

Engineering Contradiction:

Improveair supply reliabilityVSAvoidcompressor lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The system implements periodic monitoring of air pressure and flow conditions, switching between full load operation and reduced load operation based on detected needs. This periodic assessment allows the compressor to operate at full capacity only when necessary, reducing overall wear and extending lifespan while maintaining reliable air supply.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system changes operational parameters of the compressor based on real-time conditions, adjusting pressure and flow rates to match actual demand. By varying these parameters rather than maintaining constant full-load operation, the system reduces mechanical stress on the compressor while ensuring adequate air supply for brake testing.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If air is continuously supplied to detect obstructions, then leak identification is improved, but energy waste increases

Engineering Contradiction:

Improveleak detection precisionVSAvoidcompressed air energy loss

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The system performs preliminary detection of train-line conditions using controlled air flow before initiating full brake testing. This preliminary action allows the system to identify obvious obstructions or leaks early, enabling subsequent energy-efficient operation while maintaining the ability to detect issues.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies partial air flow rather than full pressure continuously, using just enough air to maintain monitoring capability and detect leaks. This partial action approach reduces energy loss while preserving the system's ability to identify train-line obstructions and leaks when they occur.

Inventive Principle:

Principle #16Partial or excessive action

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 system minimizes energy consumption and extends compressor lifespan by automatically adjusting the air compressor load based on whether the system is open or closed, thereby reducing venting to atmosphere and associated costs.

Implementation Method 1

the sensor is configured to sense an air pressure at the supply air outlet

Methodology Applied

Scientific EffectPressure sensing:

Implementation Method 2

the regulator regulates down the air pressure of air at the supply air outlet to a pre-set reduced air pressure

Methodology Applied

Scientific EffectPressure regulation:

Data Source

PatentUS12304441B2Air compressor load management system and method including an air compressor load control device

Publication Date: 2025.05.20 AIR PROD & SERVICES INC

AI summary

An air compressor load management device. The air compressor load management device may include a supply air inlet; a first valve; a controller; a sensor; a regulator; a second valve; a supply air outlet; and a sensing line, wherein the sensor is configured to sense an air pressure at the supply air outlet, and wherein depending on the sensed air pressure at the supply air outlet the sensor signals the controller to cause the first valve to one of send air received from the supply air inlet to the regulator, send air received from the supply air inlet directly to the second valve via the full pressure air line, or to not send any air.