Controllable Vibration Damper With Single Valve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibration dampers with 2-tube configurations require two control valves, while those following the uniflow principle are typically constructed as 3-tube configurations with a single unidirectional control valve, lacking the simplicity of a single control valve in 2-tube designs.
Innovation Solution
A vibration damper with a 2-tube configuration utilizing a single damping valve and a gas volume separated from the low-pressure region, allowing for a radially slender construction and adjustable damping characteristics through a controllable valve unit, enabling different damping settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a 2-tube configuration vibration damper uses two control valves to handle compression and rebound stages, then the damping control is achieved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the damping function into compression and rebound stages, with each stage handled by a dedicated control valve. This allows independent optimization of damping characteristics for each stroke direction, achieving versatile damping control while maintaining a relatively simple 2-tube configuration structure.
2Device complexity
If a vibration damper follows the uniflow principle with a single unidirectional control valve, then the device complexity is reduced, but the adaptability for different damping stages is limited
Solution Approach 1:
The patent extracts the rebound-stage damping function from the compression-stage damping function by providing separate control valves for each stage. This allows the uniflow principle to be applied to compression damping while adding specific control for rebound damping, achieving versatile damping control without significantly increasing overall device complexity.
3Device complexity
If a 3-tube configuration is used to implement the uniflow principle with a single control valve, then the radial space is increased, but the device complexity and space requirements increase
Solution Approach 1:
The patent applies the nested doll principle by placing the inner tube containing the compression control valve inside the outer tube housing. This nested 2-tube configuration allows both compression and rebound damping control functions to be integrated in a compact radial space, avoiding the need for a third external cylinder tube while maintaining configuration simplicity.
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 a simplified 2-tube configuration with adjustable damping characteristics, eliminating the need for a third cylinder tube and providing a compact, versatile vibration damper that functions according to the uniflow principle with a single control valve.
Implementation Method 1
a damper housing tube (12), which is at least partially filled with damping medium, and a damping valve (14) for damping force control
Implementation Method 2
a gas volume (42) held in the tubular damper housing (12)
Data Source
AI summary
A controllable vibration damper includes a damping force control system, having a damper housing tube. The damper is at least partially filled with a damping medium. A damping valve for damping force control is arranged on and fluidly connected to the damper housing tube. The damper housing tube has an inner tube, which is inserted into the tubular damper housing via a bottom valve element. The vibration damper has a piston rod, which can be moved longitudinally in the inner tube and has a working piston.