Rail Vehicle Air Spring Valve Mounting for Precise Height Control
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Solution Overview
Problem
Existing rail vehicle air spring control systems misinterpret relative movements between the car body and chassis as suspension processes, leading to incorrect height adjustments and increased air consumption, due to the lack of precise differentiation between actual suspension and other movements like rolling and pitching.
Innovation Solution
The air spring linkage is mounted in the middle of a torsion bar connected to both the body and chassis, with the air spring valve pivoting about the chassis' transverse axis, decoupling non-suspension movements and using a roll adapter that can be designed as a potentiometer to convert rotational movements into translational measurements for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the air spring linkage is used to detect relative movements between car body and chassis, then height regulation can be performed, but non-suspension movements (rolling, pitching) are misinterpreted as suspension processes leading to incorrect height adjustments and increased air consumption
Solution Approach 1:
The system separates suspension detection from rolling/pitching detection by using two independent detection paths: the air spring linkage detects only vertical suspension movements, while separate rolling and pitching sensors detect rotational movements. This segmentation prevents misinterpretation of non-suspension movements and reduces unnecessary air consumption for height adjustment.
Solution Approach 2:
The control unit acts as an intermediary that receives signals from both the air spring linkage and the rolling/pitching sensors. It processes these signals to distinguish between actual suspension needs and body movements, enabling accurate height control while preventing false triggering of air spring adjustment.
2Loss of energy
If electronic switching means are added to control air flow and reduce misinterpretation of movements, then air consumption can be reduced, but device complexity increases
Solution Approach 1:
The patent replaces complex electronic switching means with a simplified mechanical detection system. The air spring linkage is designed to detect only vertical compression and extension movements, inherently filtering out rolling and pitching movements through its mechanical configuration. This mechanical solution is simpler than electronic flow control switching means while achieving the same goal of reducing false air consumption.
3Reliability
If complex parameter-based control systems are used to differentiate vehicle states, then height regulation accuracy can be improved, but technical complexity increases
Solution Approach 1:
The patent extracts and isolates the specific function of detecting vertical suspension movements from the air spring linkage, separating it from the detection of rolling and pitching movements. This extraction allows the system to focus on height control using simple mechanical detection without requiring complex parameter-based control systems to differentiate between various vehicle states.
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 provides precise height control with low air consumption and minimal technical complexity, ensuring robustness by direct mechanical decoupling and eliminating the need for complex parameter-based control systems, while allowing adjustable nominal distances and accurate angle/path measurements for informed air spring control.
Implementation Method 1
The air spring linkage is mounted in the middle of a torsion bar of a tank system, which is connected to the body and to the chassis, so that it can pivot about a transverse axis of the chassis
Implementation Method 2
the roll adapter that can be designed as a potentiometer to convert rotational movements into translational measurements for precise control
Data Source
Figure 1
AI summary
The invention relates to an air spring control arrangement for a rail vehicle with at least one car body and at least one bogie. The air spring control arrangement comprises at least one air spring valve (1) and at least one air spring linkage (2). To create advantageous design conditions, it is proposed that the at least one air spring valve (1) be mounted on the at least one bogie and be connected to the car body at least via the at least one air spring linkage (2) in such a way that relative movements between the at least one car body and the at least one bogie are transmitted from the at least one air spring linkage (2) to the at least one air spring valve (1), which can be clearly attributed to suspension processes between the at least one car body and the at least one bogie.This results in particularly precise height control of at least one air spring of the rail vehicle and low air consumption.