Variable Output Cylinder for Consistent Railcar Braking Force
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Solution Overview
Problem
Conventional railcar brake assemblies face challenges in maintaining a precise range of piston travel to ensure consistent braking force, which is difficult and costly to achieve, leading to inefficiencies and increased maintenance needs.
Innovation Solution
The implementation of a variable output cylinder system utilizing a one-way cylinder concept with a pliable membrane and a spring mechanism, where air pressure and cross-sectional area ratios control piston rod extension, allowing for adjustable braking force by varying the cross-sectional area as the piston rod traverses, thereby maintaining consistent braking force across the full stroke.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional brake assemblies use fixed piston travel ranges to ensure consistent braking force, then braking performance is maintained, but manufacturing precision and maintenance costs increase
Solution Approach 1:
The patent applies the dynamics principle by making the piston rod extension variable rather than fixed. The variable output cylinder allows the piston rod to extend different distances based on operational needs, while the cross-sectional area of the piston changes during stroke to maintain consistent braking force. This dynamic adjustment eliminates the need for precise fixed travel limits.
Solution Approach 2:
The patent changes the parameter of cross-sectional area during piston stroke. As the piston rod extends, the cross-sectional area of the piston decreases, which compensates for the increased travel distance and maintains consistent braking force. This parameter change allows broader service travel limits without sacrificing braking consistency.
2Reliability
If conventional brake assemblies reduce piston travel range to maintain consistent braking force, then braking performance is improved, but maintenance frequency increases
Solution Approach 1:
The variable output cylinder dynamically adjusts the piston rod extension distance based on the cross-sectional area changes during stroke. This allows the system to accommodate larger piston travel ranges while maintaining consistent braking force, thereby reducing maintenance frequency and improving productivity.
3Power
If conventional brake assemblies use larger piston travel to increase braking force, then braking power is improved, but braking force consistency deteriorates
Solution Approach 1:
The patent changes the cross-sectional area parameter during piston stroke to compensate for increased travel distance. As the piston extends further to increase braking power, the cross-sectional area decreases proportionally, maintaining consistent braking force throughout the stroke and resolving the contradiction between power and consistency.
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
This solution enables increased acceptable service travel limits for the piston rod, reducing maintenance costs and improving braking performance by maintaining consistent braking force throughout the full stroke, eliminating the need for precise piston travel adjustments.
Implementation Method 1
a spring mechanism, where air pressure and cross-sectional area ratios control piston rod extension
Implementation Method 2
air pressure and cross-sectional area ratios control piston rod extension
Implementation Method 3
allowing for adjustable braking force by varying the cross-sectional area as the piston rod traverses
Data Source
AI summary
A variable output cylinder system includes a housing forming an inner cavity, the housing having a centerline co-axially extending through center of the inner cavity, and a first section secured to a second section, the first section having a sidewall the tapers outwardly relative to the centerline and relative to an opening passing through a thickness of the first section; a piston rod extending through and slidingly engaged with the opening; a piston head rigidly attached to an end of the piston rod; a pliable membrane fixedly secured to an outer surface of the piston head, the pliable membrane forming a sealed chamber within the second section, the pliably membrane forming an area disposed between the of the first section and an outer surface of the piston head; and a second opening extending through a thickness of the second section and configured to provide passage to the sealed chamber. The area disposed between the first section and the outer surface of the piston head increases in size as the piston traverses away from the opening of the first section.