Movable Valve Base for Air Spring Damping
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Solution Overview
Problem
Existing damper valves for air springs in vehicle suspensions face challenges in providing high damping performance with large switching cross sections while maintaining a robust, cost-effective, and leak-resistant design, especially when dealing with varying pressure and movement amplitudes.
Innovation Solution
A path-controlled passive damper valve with a movable valve base that adjusts based on pressure, allowing for a larger amount of damping medium to be compensated and preventing premature closure until pressure equalization is complete, featuring a valve base that can be axially moved and connected to the valve housing via a friction surface for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional damper valve design is used, then the structure is simple and cost-effective, but the damping performance is insufficient for large movement amplitudes
Solution Approach 1:
The valve base is designed to be movable relative to the valve body, allowing the valve opening area to dynamically adjust based on pressure differential. This dynamic adjustment enables the valve to provide high damping performance for large movement amplitudes while maintaining a relatively simple overall structure.
Solution Approach 2:
The valve opening area is changed as a parameter by moving the valve base axially. The position of the valve base changes the effective opening area of the valve, allowing the damping characteristic to be adjusted based on operating conditions without complex control mechanisms.
2Reliability
If a larger valve body cross section is used, then more damping medium can be compensated, but material costs and leakage increase
Solution Approach 1:
Instead of using a consistently large valve body cross-section, the invention uses a movable valve base that dynamically adjusts the effective opening area. This allows sufficient damping medium compensation when needed while maintaining a smaller overall valve body size, reducing material costs and potential leakage paths.
3Speed
If the valve closes early, then the response time is fast, but pressure equalization is incomplete
Solution Approach 1:
The valve closing pressure differential threshold is changed as a parameter by the movable valve base. The valve base moves in response to pressure differential, allowing the valve to remain open longer for complete pressure equalization while still providing fast response when the pressure differential exceeds the threshold.
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 solution achieves high damping performance with a reduced valve body cross section, lowering material costs and leakage, while ensuring reliable operation across varying pressure and movement conditions.
Implementation Method 1
a valve base (213) which is connected to the valve housing (212) and the valve body (214) and can be adjusted as a function of the pressure
Implementation Method 2
The valve base can be axially movable, in particular movable along the longitudinal axis of the damper valve
Data Source
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AI summary
The invention relates to a damping valve (211) for damping a relative movement between a first mass and a second mass, having the following features: a valve housing (212) with a housing wall which has valve openings, said valve housing being designed to be connected to the first mass; a valve element (214) which has through-openings and is arranged within the valve housing in a movable manner between a first deflection position and a second deflection position, wherein the through-openings are arranged such that the valve openings are closed by the valve element when the valve element is deflected into the first or the second deflection position, and the valve openings and the through-openings at least partly overlap when the valve element is located in an intermediate position between the first and the second deflection position; a securing element (218; 918) which is connected to the valve element; and a coupling element (216) which has a first end that is connected to the securing element (218) in a slidable manner and which has a second end that is designed to be connected to the second mass (202, 204) solely by pressing. The damping valve (211) has a valve base (213) which is connected to the valve housing (212) and the valve element (214), and the valve base (213) can be adjusted on the basis of pressure. The invention further relates to an air spring for damping a relative movement between a first mass (802) and a second mass (202).