Shock Absorber Pressure Control for Stable Damping Behavior
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Solution Overview
Problem
Existing hydraulic shock absorbers exhibit deviations in damping behavior under high loads and varying temperatures, impairing their performance.
Innovation Solution
A shock absorber with a control block and control ring system that adjusts the pressure ratio between the jacket gap and cylinder interior via channels, controlled by a control ring and electromagnet, allowing for temperature and pressure compensation to maintain consistent damping behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic shock absorbers are used to dampen vibrations, then vibration damping performance is improved, but deviations in damping behavior occur under high loads and varying temperatures
Solution Approach 1:
The patent changes the physical state and parameters of the damping fluid by introducing a two-phase system (liquid and gas) instead of a single liquid phase. The gas phase (nitrogen) is compressed into the liquid hydraulic oil, creating a mixture that maintains consistent damping behavior across varying temperatures and loads. This parameter change in the fluid composition resolves the contradiction by making the system adaptable to different operating conditions while maintaining reliable damping performance.
2Ease of operation
If the damper sleeve expands under high pressure to increase fluid flow, then ease of operation is improved, but deviations from desired damping behavior occur under high loads
Solution Approach 1:
The patent introduces a control block as an intermediary component between the cylinder interior and the jacket gap. This control block contains channels that actively regulate fluid flow, replacing the passive elastic expansion mechanism. The control block mediates the pressure equalization between the jacket gap and cylinder interior, ensuring consistent damping behavior under high loads while maintaining ease of operation through controlled fluid pathways.
3Reliability
If a control block with channels is introduced to adjust pressure ratio, then damping behavior consistency is improved, but device complexity increases
Solution Approach 1:
The control block performs multiple functions within a single integrated component: it regulates fluid flow between the jacket gap and cylinder interior, equalizes pressure differences, and maintains consistent damping behavior across varying operating conditions. By combining these functions into one universal component rather than separate systems, the patent reduces overall device complexity while achieving reliable damping consistency.
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
Ensures defined damping behavior across varying loads and temperatures by adjusting the pressure ratio, enhancing performance consistency.
Implementation Method 1
the jacket gap (13) is connected on at least one side to at least one first channel (723) of a control block (7), which is connected to the cylinder interior (20) via at least one second channel (725), wherein the control block (7) has a control part (73) for controlling the flow between the at least one first channel (723) and the at least one second channel (725)
Implementation Method 2
the cylinder's inner wall is formed by the inner wall of a damper sleeve inserted into the cylinder, the outer diameter of which is smaller than the inner diameter of the cylinder tube. This allows the damper sleeve to expand when pressure increases in the cylinder, thereby increasing the annular gap between the damper sleeve and the piston
Implementation Method 3
means for controlled axial movement of the control ring are provided, which are preferably electrically operable
Data Source
Figure 1a~2b
Figure 2c~3d
Figure 4
AI summary
The invention relates to a shock absorber comprising a cylinder (1) filled with a fluid and a piston rod (3) guided therein, wherein the piston rod (3) is guided into or through the cylinder (1) and is provided with at least one piston (4), wherein at least one damper sleeve (2) is arranged in the cylinder (1) surrounding the at least one piston (4), the outer diameter of which is smaller than the inner diameter of the cylinder (1) and the inner diameter of which is larger than the outer diameter of the at least one piston (4), whereby an annular gap (46) is formed between the at least one piston (4) and the at least one damper sleeve (2), and a jacket gap (13) is formed between the at least one damper sleeve (2) and the cylinder (1), wherein the jacket gap (13) is connected on at least one side to at least one first channel (723) of a control block (7),which is connected to the cylinder interior via at least one second channel (725), and wherein the control block (7) has a control part for controlling the flow between the at least one first channel (723) and the at least one second channel (725).