Train Suspension Control via Triangular Air Spring Valves
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Solution Overview
Problem
Current air spring suspension control modes in trains, such as two-point and four-point control modes, fail to effectively prevent side-rolling and ensure consistent force distribution across bogies and carriages, leading to instability and reduced adaptability to track curves.
Innovation Solution
A method and system using three height adjusting valves forming a triangular structure to control the pressure of air spring groups, ensuring that the center of gravity aligns with the train baseplate, and air springs are divided into three independent groups to maintain consistent internal pressure and force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two-point control mode is used to simplify the control system, then device complexity is reduced, but side-rolling resistance is insufficient requiring additional torsion bars
Solution Approach 1:
The air spring suspension system is segmented into three independent control zones corresponding to three bogies, with each bogie having its own height adjusting valve. This segmentation allows independent pressure control of each bogie's air springs, enabling the system to prevent side-rolling through differential pressure control without requiring additional torsion bars, thus resolving the contradiction between simplified control and side-rolling resistance.
Solution Approach 2:
The system changes the pressure parameter of air springs in each bogie independently through three separate height adjusting valves. By dynamically adjusting the air pressure in each bogie's air springs based on load distribution and side-rolling conditions, the system achieves both simplified control architecture and effective side-rolling prevention, eliminating the need for mechanical torsion bars.
2Reliability
If four-point control mode is used to improve side-rolling resistance, then stability is improved, but bogie modules move independently causing inconsistent force distribution
Solution Approach 1:
The system merges the control functions of multiple air springs within each bogie by connecting them to a common height adjusting valve. This merging ensures that all air springs in a bogie maintain consistent internal pressure, preventing independent movement of bogie modules and ensuring uniform force distribution across the carriage and bogie interface, while still providing adequate side-rolling resistance through the three-bogie configuration.
3Reliability
If three-point control mode with two sets of height adjusting mechanisms is used, then side-rolling is prevented, but structure becomes complex with redundant mechanisms
Solution Approach 1:
The system extracts and eliminates the redundant height adjusting mechanism from the three-point control mode. Instead of using two sets of height adjusting mechanisms, the invention uses a single height adjusting valve per bogie that directly controls the air pressure of all air springs in that bogie. This extraction of redundancy maintains side-rolling prevention capability while significantly simplifying the overall control structure.
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 approach stabilizes the train by preventing side-rolling and ensuring consistent force distribution, improving the train's adaptability to track curves and enhancing safety and reliability.
Implementation Method 1
air springs compress a lot, while in the area where the passengers are scarce, the air springs compress less
Implementation Method 2
Air is supplied to or exhausted from the air spring through a pipeline 3, so as to keep the train body in a stable state
Data Source
AI summary
A method for train suspension control by means of multiple air springs includes: receiving a vehicle load pressure; and controlling height adjustment valves according to the vehicle load pressure to adjust the pressure of a first air spring set, a second air spring set and/or a third air spring set. Three height adjustment valves are provided, and the three height adjustment valves form a triangular structure. Each of the first air spring set, the second air spring set and the third air spring set comprises a plurality of individual air springs, and all the individual air springs in each of the air spring sets are correspondingly connected to the same height adjustment valve. A system for train suspension control by means of multiple air springs and a train are further provided.