Multi-Column Hydraulic Damping Chock Stiffness Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hydraulic chocks with a single resonant column of fluid are inadequate in providing sufficient damping and filtering capabilities, particularly in managing vibrations caused by engine modes, which impact vehicle comfort and performance.
Innovation Solution
A hydraulic damping chock with multiple columns of fluid, where each column is connected to a common main inflation chamber and specific clean inflation chambers, allowing for varying inflation stiffness ratios to enhance filtering and damping capacities, including higher maximum loss factors over a wider frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single resonant column of fluid is used in conventional hydraulic chocks, then the device complexity is reduced, but the filtering and damping capacities are insufficient
Solution Approach 1:
The patent divides the single hydraulic column into multiple parallel columns (at least two), each with its own compensation chamber. This segmentation increases the filtering and damping capacities by providing multiple fluid pathways that can independently manage different vibration frequencies, while maintaining a relatively simple overall structure.
2Reliability
If multiple columns of fluid with varying inflation stiffness ratios are used, then the filtering and damping capacities are enhanced, but the device complexity increases
Solution Approach 1:
The patent applies local quality by giving each compensation chamber a different inflation stiffness (Kmi) relative to the main chamber (Kg), creating varying stiffness ratios across the parallel columns. This allows each column to be optimized for specific frequency ranges, enhancing overall filtering capacity while maintaining a modular design that manages complexity.
3Reliability
If multiple columns of fluid with varying inflation stiffness ratios are used, then the loss factor is increased over a wider frequency band, but the manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes parameter changes by varying the inflation stiffness ratios (Kmi/Kg) across different compensation chambers. This allows the system to achieve high loss factors over wide frequency bands by adjusting the stiffness parameters of individual chambers, providing design flexibility that can accommodate manufacturing tolerances while maintaining performance.
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 multi-column configuration increases the wedge's filtering and damping capabilities, effectively controlling perceivable vibrations in vehicles by managing different natural suspension modes, thereby improving comfort and reducing vibrations.
Implementation Method 1
hydraulic damping chock comprising: at least two columns of fluid, each column having one end placed in communication with a first hydraulic working chamber capable of hydraulic inflation
Implementation Method 2
at least one of the proper inflation chambers has an inflation stiffness of the order of magnitude of the inflation stiffness of the main inflation chamber
Implementation Method 3
each column having one end placed in communication with a first hydraulic working chamber capable of hydraulic inflation
Implementation Method 4
the other end of each column of fluid being placed in communication with a second hydraulic compensation chamber specific to each column of fluid
Data Source
Figure 1~3
Figure 4~6
Figure 7~8b
AI summary
The invention relates to a hydraulic damping shim (10) which includes: at least two columns of fluid (13.1-13.N); each column (13.1-13.N) having one end placed in communication with a first hydraulic working chamber (15) capable of hydraulic inflation, referred to as main inflation chamber, said main inflation chamber (15) being common to all the fluid columns (13.1-13.N); the other end of each fluid column (13.1-13.N) being placed in communication with a second hydraulic compensation chamber (16.1) specific to each fluid column, said second chambers, referred to as specific inflation chambers (16.1), being likewise capable of hydraulic inflation, at least one of the specific inflation chambers (16.1) having an inflation stiffness (Kmi) of the order of magnitude of the inflation stiffness (Kg) of the main inflation chamber (15) or greater than the inflation stiffness (Kg) of the main inflation chamber (15).